Can supervise: YES
Moghaddam, F, Sirivivatnanon, V & Vessalas, K 2019, 'The effect of fly ash fineness on heat of hydration, microstructure, flow and compressive strength of blended cement pastes', Case Studies in Construction Materials, vol. 10.View/Download from: Publisher's site
© 2019 In this paper, an experimental study on the effect of fly ash fineness on the heat of hydration, microstructure, flow and compressive strength of blended cement pastes was carried out and evaluated against control cement paste. Fly ashes with different fineness: classified fly ash, run-of-station fly ash and grounded run-of-station fly ash; with a median particle size of 17.4, 11.3 and 5.7 m, respectively, from the same power station source in Australia were used to partially replace Portland cement at 20% and 40% by weight of cement using a fixed water-to-binder ratio of 0.40. Results of this study showed that the cumulative heat of hydration of blended cement paste decreased as fly ash content in blended cement paste was increased. For a given cement replacement level, blended cement paste containing finer fly ash released more heat of hydration when compared to coarser fly ash. Moreover, increasing the fineness of fly ash resulted in a higher consumption of calcium hydroxide at 7 and 28 days reflecting pozzolanic reactivity and, thus, a denser microstructure than blended pastes containing coarser fly ash as revealed by the X-ray diffraction (XRD), scanning electron microscopy (SEM) and compressive strength results. In addition, the incorporation of fly ash in the blended pastes led to the introduction of an additional hydration peak in the heat evolution curve possibly due to the late activation of fly ash by calcium hydroxide renewing the C 3 A reaction and converting ettringite to monosulfate. The flow of the freshly blended cement pastes was also found to improve slightly with increasing fineness of the fly ash. In addition, the hardened blended cement pastes containing 20% ground run-of-station fly ash showed comparable compressive strength with the control cement pastes at both 7 and 28 days mainly due to the higher fineness of the ground run-of-station fly ash and increased reactivity compared to coarser grade fly ash.
Tapas, M, Vessalas, K, Thomas, P, Sirivivatnanon, V & Brenner, J 2018, 'Effect of Limestone Content in Cement on Alkali-Silica Reaction Using Accelerated Mortar Bar Test', Concrete in Australia, vol. 44, no. 2, pp. 41-47.View/Download from: UTS OPUS
Erkmen, RE, Gowripalan, N & Sirivivatnanon, V 2017, 'Elasto-plastic damage modelling of beams and columns with mechanical degradation', Computers and Concrete, vol. 19, no. 3, pp. 315-323.View/Download from: UTS OPUS or Publisher's site
© 2017 Techno-Press, Ltd. Within the context of continuum mechanics, inelastic behaviours of constitutive responses are usually modelled by using phenomenological approaches. Elasto-plastic damage modelling is extensively used for concrete material in the case of progressive strength and stiffness deterioration. In this paper, a review of the main features of elasto-plastic damage modelling is presented for uniaxial stress-strain relationship. It has been reported in literature that the influence of Alkali-Silica Reaction (ASR) can lead to severe degradations in the modulus of elasticity and compression strength of the concrete material. In order to incorporate the effects of ASR related degradation, in this paper the constitutive model of concrete is based on the coupled damage-plasticity approach where degradation in concrete properties can be captured by adjusting the yield and damage criteria as well as the hardening moduli related parameters within the model. These parameters are adjusted according to results of concrete behaviour from the literature. The effect of ASR on the dynamic behaviour of a beam and a column are illustrated under moving load and cyclic load cases.
Mohammadreza Hassani, E, Vessalas, K, Sirivivatnanon, V & Baweja, D 2017, 'Influence of permeability-reducing admixtures on water penetration in concrete', ACI Materials Journal, vol. 114, no. 6, pp. 911-922.View/Download from: UTS OPUS or Publisher's site
Copyright © 2017, American Concrete Institute. All rights reserved. An experimental investigation was carried out on concrete into the effectiveness of integral permeability-reducing admixtures as possible alternatives to the traditional external waterproofers. The efficiency of hydrophobic water repellents and crystalline pore blockers were evaluated in concretes incorporating fixed water-cementitious materials ratio (w/cm) and different cementitious material types covering OPC, fly ash, and granulated blast-furnace slag. Three different test methods were employed to evaluate the water penetration resistance of concrete. To isolate the benefits that are achieved by varying the mixture design parameters, statistical factorial analysis of variances was carried out to discover the significance of each variable. Results indicated that the effect of w/cm and cementitious material is more pronounced compared to the addition of permeability-reducing admixtures. It was also demonstrated that the admixtures can be effective in reducing water penetration; however, their effect is varied in different mixtures. Caution must be exercised when using such admixtures in different concrete mixtures.
Sirivivatnanon, V, Mohammadi, J & South, W 2016, 'Reliability of new Australian test methods in predicting alkali silica reaction of field concrete', CONSTRUCTION AND BUILDING MATERIALS, vol. 126, pp. 868-874.View/Download from: UTS OPUS or Publisher's site
Foster, SJ, Stewart, MG, Loo, M, Ahammed, M & Sirivivatnanon, V 2016, 'Calibration of Australian Standard AS3600 Concrete Structures: part I statistical analysis of material properties and model error', AUSTRALIAN JOURNAL OF STRUCTURAL ENGINEERING, vol. 17, no. 4, pp. 242-253.View/Download from: UTS OPUS or Publisher's site
Stewart, MG, Foster, S, Ahammed, M & Sirivivatnanon, V 2016, 'Calibration of Australian Standard AS3600 concrete structures part II: reliability indices and changes to capacity reduction factors', AUSTRALIAN JOURNAL OF STRUCTURAL ENGINEERING, vol. 17, no. 4, pp. 254-266.View/Download from: UTS OPUS or Publisher's site
Sirivivatnanon, V, Thomas, WA & Waye, K 2012, 'Determination of free chlorides in aggregates and concrete', Australian Journal of Structural Engineering, vol. 12, no. 2, pp. 151-158.
Chlorides exist as either "bound" or "free" chloride in concrete. It is well recognised that it is the free chloride that contributes to steel depassivation and subsequent corrosion in concrete. In measuring the amount of chlorides in aggregates and concrete, both "water-soluble" and "acid-soluble (total) chloride" test methods have been used. The aggressiveness of the extractive techniques determines the type and amount of chlorides. This was investigated in terms of the type of extracting agent and degree of fractured surface of the materials. It was found that the use of boiling water on materials passing 850-micron sieve offered a well balanced measure of the free chloride contents in aggregate. The findings were also confirmed valid in testing hardened concrete. © Institution of Engineers, Australia 2012.
De Silva, P, Bucea, L & Sirivivatnanon, V 2009, 'Chemical, microstructural and strength development of calcium and magnesium carbonate binders', CEMENT AND CONCRETE RESEARCH, vol. 39, no. 5, pp. 460-465.View/Download from: Publisher's site
Chindaprasirt, P, Rukzon, S & Sirivivatnanon, V 2008, 'Resistance to chloride penetration of blended Portland cement mortar containing palm oil fuel ash, rice husk ash and fly ash', CONSTRUCTION AND BUILDING MATERIALS, vol. 22, no. 5, pp. 932-938.View/Download from: Publisher's site
Quick, GW & Sirivivatnanon, V 2008, 'Predicting iron staining of siderite-bearing microsyenites intended for dimension stone use', CONSTRUCTION AND BUILDING MATERIALS, vol. 22, no. 3, pp. 257-263.View/Download from: Publisher's site
Khatri, RP, Quick, GW & Sirivivatnanon, V 2008, 'Durability of concrete containing siderite-bearing microsyenite and trachyte aggregates', CEMENT & CONCRETE COMPOSITES, vol. 30, no. 4, pp. 307-315.View/Download from: Publisher's site
Chindaprasirt, P, Rukzon, S & Sirivivatnanon, V 2008, 'Effect of carbon dioxide on chloride penetration and chloride ion diffusion coefficient of blended Portland cement mortar', CONSTRUCTION AND BUILDING MATERIALS, vol. 22, no. 8, pp. 1701-1707.View/Download from: Publisher's site
De Silva, P, Sagoe-Crenstil, K & Sirivivatnanon, V 2007, 'Kinetics of geopolymerization: Role of Al2O3 and SiO2', CEMENT AND CONCRETE RESEARCH, vol. 37, no. 4, pp. 512-518.View/Download from: Publisher's site
De Silva, P, Bucea, L, Sirivivatnanon, V & Moorehead, DR 2007, 'Carbonate binders by "cold sintering" of calcium carbonate', JOURNAL OF MATERIALS SCIENCE, vol. 42, no. 16, pp. 6792-6797.View/Download from: Publisher's site
Chindaprasirt, P, Chareerat, T & Sirivivatnanon, V 2007, 'Workability and strength of coarse high calcium fly ash geopolymer', CEMENT & CONCRETE COMPOSITES, vol. 29, no. 3, pp. 224-229.View/Download from: Publisher's site
Chindaprasirt, P, Chotithanorm, C, Cao, HT & Sirivivatnanon, V 2007, 'Influence of fly ash fineness on the chloride penetration of concrete', CONSTRUCTION AND BUILDING MATERIALS, vol. 21, no. 2, pp. 356-361.View/Download from: Publisher's site
Sirivivatnanon, V, Castel, A, Francois, R, Li, CQ & Zheng, JJ 2007, 'Propagation of reinforcement corrosion in concrete and its effects on structural deterioration - Discussion', MAGAZINE OF CONCRETE RESEARCH, vol. 59, no. 2, pp. 151-154.
De Silva, P, Bucea, L, Moorehead, DR & Sirivivatnanon, V 2006, 'Carbonate binders: Reaction kinetics, strength and microstructure', CEMENT & CONCRETE COMPOSITES, vol. 28, no. 7, pp. 613-620.View/Download from: Publisher's site
McGhie, S, Cox, J, Bucea, L & Sirivivatnanon, V 2005, 'Urban salinity site investigations for greenfield developments', Australian Geomechanics Journal, vol. 40, no. 4, pp. 23-26.
Khatri, RP, Sirivivatnanon, V & Heeley, P 2004, 'Critical polarization resistance in service life determination', CEMENT AND CONCRETE RESEARCH, vol. 34, no. 5, pp. 829-837.View/Download from: Publisher's site
Chindaprasirt, P, Homwuttiwong, S & Sirivivatnanon, V 2004, 'Influence of fly ash fineness on strength, drying shrinkage and sulfate resistance of blended cement mortar', CEMENT AND CONCRETE RESEARCH, vol. 34, no. 7, pp. 1087-1092.View/Download from: Publisher's site
Khatri, RP & Sirivivatnanon, V 2004, 'Characteristic service life for concrete exposed to marine environments', CEMENT AND CONCRETE RESEARCH, vol. 34, no. 5, pp. 745-752.View/Download from: Publisher's site
Baweja, D, Roper, H & Sirivivatnanon, V 2003, 'Improved electrochemical determinations of chloride-induced steel corrosion in concrete', ACI MATERIALS JOURNAL, vol. 100, no. 3, pp. 228-238.
Lim, CC, Gowripalan, N & Sirivivatnanon, V 2000, 'Microcracking and chloride permeability of concrete under uniaxial compression', CEMENT & CONCRETE COMPOSITES, vol. 22, no. 5, pp. 353-360.View/Download from: Publisher's site
Baweja, D, Roper, H & Sirivivatnanon, V 1999, 'Chloride-induced steel corrosion in concrete: part 2 - Gravimetric and electrochemical comparisons', ACI MATERIALS JOURNAL, vol. 96, no. 3, pp. 306-313.
Baweja, D, Roper, H & Sirivivatnanon, V 1999, 'Specification of concrete for marine environments: A fresh approach', ACI MATERIALS JOURNAL, vol. 96, no. 4, pp. 462-470.
Baweja, D, Roper, H & Sirivivatnanon, V 1998, 'Chloride-induced steel corrosion in concrete: Part 1 - Corrosion rates, corrosion activity, and attack areas', ACI MATERIALS JOURNAL, vol. 95, no. 3, pp. 207-217.
Khatri, RP, Sirivivatnanon, V & Yu, LK 1997, 'Effect of curing on water permeability of concretes prepared with normal Portland cement and with slag and silica fume', MAGAZINE OF CONCRETE RESEARCH, vol. 49, no. 180, pp. 167-172.View/Download from: Publisher's site
Khatri, RP & Sirivivatnanon, V 1997, 'Methods for the determination of water permeability of concrete', ACI MATERIALS JOURNAL, vol. 94, no. 3, pp. 257-261.
KHATRI, RP, SIRIVIVATNANON, V & GROSS, W 1995, 'EFFECT OF DIFFERENT SUPPLEMENTARY CEMENTITIOUS MATERIALS ON MECHANICAL-PROPERTIES OF HIGH-PERFORMANCE CONCRETE', CEMENT AND CONCRETE RESEARCH, vol. 25, no. 1, pp. 209-220.View/Download from: Publisher's site
CAO, HT, BUCEA, L & SIRIVIVATNANON, V 1994, 'INFLUENCE OF BINDER TYPE ON ANODIC-DISSOLUTION OF STEEL EMBEDDED IN CEMENT PASTES', CEMENT AND CONCRETE RESEARCH, vol. 24, no. 2, pp. 203-213.View/Download from: Publisher's site
Dynamic polarization techniques were used to estimate the corrosion rates of steel embedded in cement paste made with different binder systems. A corrosion model is proposed. The corrosion rates were determined by employing the Evans diagrams constructed from cathodic polarization curve of steel embedded in chloride free cement paste and anodic polarization curve of steel embedded in cement pastes containing chloride. Within the limitations of the adopted experimental conditions and sample configuration, the preliminary results indicate that corrosion rates of steel embedded in blended cement pastes generally fall within the range shown by steel embedded in portland cement pastes. © 1993.
BAWEJA, D, ROPER, H & SIRIVIVATNANON, V 1993, 'RELATIONSHIPS BETWEEN ANODIC POLARIZATION AND CORROSION OF STEEL IN CONCRETE', CEMENT AND CONCRETE RESEARCH, vol. 23, no. 6, pp. 1418-1430.View/Download from: Publisher's site
Baweja, D, Munn, RL, Roper, H & Sirivivatnanon, V 1992, 'Situ assessments of long-term performance of plain and blended cement concretes', Transactions of the Institution of Engineers, Australia. Civil engineering, vol. CE34, no. 2, pp. 115-127.
Between 1987 and 1990, selected elements from ten individual structures from within four facilities were examined to assess the long-term performance of concretes used. Structural members examined encompassed slabs on grade, suspended slabs and wharf elements. Individual concretes forming the selected structures had binders of normal portland cement, portland cement with fly ash or ternary systems of fly ash, ground granulated blast furnace slag and portland cement. Slag aggregates were used in certain of the concretes. Interest focused on the long-term in-service durability of the concretes. Conclusions were drawn with respect to the performance of the concretes.
Sirivivatnanon, V & Cao, HT 1991, 'Quality assurance of concrete structures analysis of in-situ concrete cover', Transactions of the Institution of Engineers, Australia. Civil engineering, vol. CE33, no. 2, pp. 111-118.
This paper presents a brief review of durability problems in reinforced concrete structures caused by lack of sufficient concrete cover and a statistical concept to analyse and to quantify in-situ concrete cover in buildings. The use of non-destructive procedures to measure the cover in building elements under construction is discussed. Cover data of a large number of buildings in Australia and Japan were analysed. It was found that the Levels of Confidence (LOC) for achieving minimum concrete cover for durability were poor, with less than 50 per cent of the structures achieving a 90% LOC. The use of the non-destructive technique of cover measurement and the statistical concept to quantify the in-situ cover as a quality auditing tool are described. The effectiveness of such a tool, coupled with a series of corrective measures implemented during the construction, to improve the LOC is demonstrated using an example of projects in Singapore. With improvements in design detailing, selection of suitable spacers and good installation practice, it is suggested that an LOC of 90% could be achieved and should be specified. These, together with the correct choice of the concrete type, cover thickness and good concreting practice, could prove to be the most economical way of achieving the design service life of concrete structures.
COOK, DJ & SIRIVIVATNANON, V 1978, 'INFLUENCE OF PREMIX POLYMER ADDITIVES ON DEFORMATION-BEHAVIOR OF CONCRETE', CEMENT AND CONCRETE RESEARCH, vol. 8, no. 3, pp. 369-380.View/Download from: Publisher's site
COOK, DJ & SIRIVIVATNANON, V 1978, 'INFLUENCE OF PREMIX POLYMER ADDITIVES ON DEFORMATION-BEHAVIOR OF CONCRETE - REPLY', CEMENT AND CONCRETE RESEARCH, vol. 8, no. 6, pp. 779-780.View/Download from: Publisher's site
COOK, DJ, MORGAN, DR, SIRIVIVATNANON, V & CHAPLIN, RP 1977, 'RAMACHANDRAN,VS AND SEREDAS,PJ DISCUSSION ON DIFFERENTIAL THERMAL-ANALYSIS OF PREMIX POLYMER CEMENT MATERIALS - REPLY', CEMENT AND CONCRETE RESEARCH, vol. 7, no. 3, pp. 357-358.View/Download from: Publisher's site
Cook, DJ, Morgan, DR, Sirivivatnanon, V & Chaplin, RP 1976, 'Differential thermal analysis of premix polymer cement materials', Cement and Concrete Research, vol. 6, no. 6, pp. 757-764.View/Download from: Publisher's site
In this paper, the use of DTA thermograms, to examine the interaction between premix polymer systems and hydrating cement, are described. The thermograms indicate that the polymerisation method (i.e., thermal or irradiation) has little effect on the nature of the hydration products. It was also observed that polystyrene, polyvinyl acetate, polymethyl methacrylate and polyester-styrene, as premix components, react with the hydrating cement. Polystyrene and polyisoprene have no effect on the calcium hydroxide endotherm while polyacrylonitrile and polymethyl methacrylate have a slight effect. Polyvinyl acetate and polyester-styrene markedly reduce the calcium hydroxide endotherm and reduce the maturity of the paste. © 1976.
Studies to determine the influence of mixtures of monomers (and subsequently copolymers) on the behaviour of premix copolymer cement materials are described in this paper. Five system viz styreneacrylonitrile, styrene-vinyl acetate, methyl methacrylate - vinyl acetate, butyl methacrylate - methyl methacrylate and butyl acrylate - methyl methcrylate, were investigated. Setting time and hydration studies were carried out on premix cement pastes while compressive strength tests were carried out on premix mortars, to determine the influence of monomer volume, surfactants and polymerisation method. The results indicated, as has most of the work on premix systems, that the influence of the copolymers was to increase setting time, decrease the degree of hydration as measured by percentage of chemically combined water and decrease strength relative to that of specimens continuously moist cured. © 1976.
Vu, TH, Gowripalan, N, De Silva, P, Sirivivatnanon, V & Kidd, P 2018, 'CARBONATION AND CHLORIDE INDUCED STEEL CORROSION RELATED ASPECTS IN FLY ASH/SLAG BASED GEOPOLYMERS - A CRITICAL REVIEW', International fib Congress, Melbourne, Australia.View/Download from: UTS OPUS
Butcher, R & Sirivivatnanon, V 2018, 'The effect particle shape and grading of manufactured sands on the plastic and hardened properties of concrete', International Federation for Structural Concrete 5th International fib Congress 2018, Melbourne.View/Download from: UTS OPUS
Nsiah-Baafi, E, Vessalas, K, Thomas, P & Sirivivatnanon, V 2018, 'Mitigating Alkali Silica Reactions in the Absence of SCMs: A Review of Empirical Studies', The International Federation for Structural Concrete 5th International fib Congress, Melbourne.View/Download from: UTS OPUS
Sanchez Roboredo, C, Thomas, P, Vessalas, K & Sirivivatnanon, V 2018, 'Advantages of Using High Alkali Cements and Industrial Waste Materials in Prevention of Alkali-silica Reaction in Concrete', Advancing Materials and Manufacturing CAMS2018 conference, University of Wollongong.View/Download from: UTS OPUS
Mckinley, MAX, Sirivivatnanon, VUTE & Hogan, C 2017, 'Effects of mix constituents on embodied energy indices of cement mortars.', 28th Biennial National Conference of the Concrete Institute of Australia, Adelaide.
Sirivivatnanon, V, Khabbaz, H & Ayton, G 2017, ''Performance-based Specification of sand for skid resistance of concrete pavements', ASCP 4th Concrete Pavement Conference, 2017.', ASCP 4th Concrete Pavement Conference, 2017.View/Download from: UTS OPUS
Tapas, M, Vessalas, K, Thomas, P & Sirivivatnanon, V 2018, 'Role of Supplementary Cementitious Material Composition in its Efficacy to Mitigate Alkali-Silica Reaction', Concrete 2017 Advances in Materials and Structures, Adelaide, Australia.View/Download from: UTS OPUS
Thomas, P, Ha Hau, WF, Vessalas, K, Sirivivatnanon, V & South, W 2017, 'Assessment of Test Methods for ASR Aggregate Reactivity', Concrete 2017 Advances in Materials and Structures, Adelaide, Australia.View/Download from: UTS OPUS
The paper reports on the initial stages of a study into the use of phase analysis using typical laboratory techniques; thermogravimetric analysis (TG), infrared spectroscopy (FTIR) and x-ray diffraction (XRD) to investigate the alkali silica reaction (ASR) with a view to classifying the relative reactivity of aggregates. Phase analysis of ground aggregates reacted under AS1141.60.1 accelerated mortar bar test (AMBT) conditions in the presence of calcium hydroxide (CH) are reported for aggregates that have been identified as non-reactive, slowly-reactive and reactive according to the AMBT test. Results of the phase analysis correlated the AMBT classifications. The reactivity of the aggregates was also compared to the reactivity of a quartz flour of similar particle size distribution which was found to be less reactive than the reactive and slowly reactive aggregates. The reactivity of the quartz flour and the reactive and slowly reactive aggregate was attributed to the highly reactive conditions used.
Khamchin Moghaddam, F, Sri Ravindrarajah, R & Sirivivatnanon, V 2015, 'PROPERTIES OF METAKAOLIN CONCRETE – A REVIEW', International Conference on Sustainable Structural Concrete, La Plata, Argentina.View/Download from: UTS OPUS
The use of cement supplementary materials in structural concrete is widely accepted by the construction industry for technical, economical and environmental reasons. Metakaolin (MK), produced by calcining kaolinite at high temperature is suitable for concrete production due to its pozzolanic property. This paper reviews the some of the research published on effects of using MK on engineering properties of structural concrete as a cement replacement material. The review shows that the use of relatively finer MK to partially replace cement reduces the consistency of concrete and enhanced the strengths, deformational and durability properties of concrete. MK is most effective in enhancing compressive strength (particularly at early ages) compared to other strengths and modulus of elasticity was least improved. Drying shrinkage and creep of MK concretes are lower than those for the control concrete. The high pozzolanic reactivity of MK with calcium hydroxide contributes to both porosity reduction and pore-structure refinement in the pastes and concrete. As the consequence, the durability of concrete is improved through increased resistance to chloride penetration and controlled expansion, due to alkali-silica reaction and sodium sulphate attack.
South, W, Thomas, T & Sirivivatnanon, V 2015, 'Acid-Soluble and Water-Soluble Chloride – Testing Proficiency and Specification', Proceedings of 27th Biennial National Conference of the Concrete Institute of Australia in conjunction with the 69th RILEM Week, Concrete Institute of Australia - Biennial Conference, Concrete Institute of Australia, Melbourne.View/Download from: UTS OPUS
The importance of limiting the chloride ion content in concrete has always been recognised and
specified in structural concrete specifications. The Australian Standard test method for acid-soluble
chloride has been revised and published as AS 1012.20.1- 2015. At the same time, a newly developed
water-soluble chloride test method has been published as a parallel Australian Standard AS 1012.20.2-
2015. The paper reviews and reports the proficiency of the two test methods and the relationship between
acid- and water-soluble chloride based on research and proficiency testing programs conducted by
Cement Concrete and Aggregates Australia (CCAA). Performance limits specified in international
concrete standards are reviewed and recommended to be specified in relevant Australian standards and
Pospischil, D, Sirivivatnanon, V, Sivathasan, U & Cheney, K 2015, 'Effectiveness of Traditional and Alternative Supplementary Cementitious Materials in Mitigating Alkali-Silica Reactivity', Proceedings of 27th Biennial National Conference of the Concrete Institute of Australia in conjunction with the 69th RILEM Week, Concrete Institute of Australia - Biennial Conference, Concrete Institute of Australia, Melbourne.View/Download from: UTS OPUS
With occasional disruptions in the supply of quality fly ash, and the global move towards sustainable means of power generation, it is timely for the Australian construction industry to examine the use of alternative Supplementary Cementitious Materials (SCM's) in various concrete applications. In this study, Metakaolin, Ground Granulated Blast Furnace Slag and Fly Ash were used to partially replace traditional Portland cement in mortar mixtures. The influence of these SCM's on the workability and early age strength development of mortars was examined, along with their effectiveness in mitigating the alkali-silica reactivity (ASR) of aggregates, which was evaluated using the new Australian Standard AS1141.60.1 (1) for the Accelerated Mortar Bar Test (AMBT). Both the type and dosage of the two SCM's were studied
Bornstein, B, Hocking, D, Bacolod, J & Sirivivatnanon, V 2015, 'The Use of Reaction Kinetics in Classifying Alkali Silica Reactivity Potential of Aggregates', Proceedings of the concrete 2015 conference: 27th biennial national conference of the concrete institute of Australia in conjunction with the 69th RILEM week conference, Concrete Institute of Australia - Biennial Conference, Concrete Institute of Australia, Melbourne, pp. 704-711.View/Download from: UTS OPUS
The Australian Standard accelerated mortar bar test (AMBT) method, AS 1141.60.1, adopts the expansion limits at two exposure periods to classify the alkali silica reactivity (ASR) of aggregate. This was a first step toward the use of 'reaction kinetics' or 'rate of reaction' to detect and classify alkali silica reactivity. The AS 1141.60.2 concrete prism test (CPT), on the other hand, uses a single expansion limit at one year to classify ASR. This paper examines the validity of the use of reaction kinetics, evaluated from the AMBT expansion data, to gauge and classify the reactivity. This may enable a better quantification of the degrees of reactivity and a more fundamental approach to ASR mitigation
Salek, S, Samali, B, Sirivivatnanon, V & Adam, G 2015, 'Development of an Acid Resistant Concrete', Proceedings of the 27th Biennial National Conference of the Concrete Institute of Australia in conjunction with the 69th RILEM Week, Concrete Institute of Australia - Biennial Conference, Concrete Institute of Australia, Melbourne, pp. 727-734.View/Download from: UTS OPUS
Modern infrastructures are designed for long service life and are increasing being built in more aggressive greenfield and brownfield areas. Sulfate, acid-sulfate and acid resistant concrete are engineering solution to these challenges in infrastructures without the need for additional protective membrane associated with conventional concrete. This paper presents an experimental investigation on mechanical properties of concretes made from a new acid-resistant mortar and a conventional concrete, and corresponding reinforced concrete beams, subjected to accelerated acidic environments in UTS laboratory. Concrete properties including compressive strength, modulus of elasticity, mod ulus of rupture, indirect tensile and drying shrinkage were examined. The load carrying capacity of companion reinforced concrete beams were determined. The specimens were tested before and after periods of exposure to sulphuric acid solution with the concentration of 7% and changes of their properties were evaluated. The results enable an understanding of the mechanism of acid attack and the benefit of the use of acid resistant concrete. On the other hand, the effect of acid attack on reinforced concrete beams is highly dependent on the design of the reinforced concrete beams and to a less extent on the acid resistant property of the concrete.
Rocker, P, Mohammadi, J, Sirivivatnanon, V & South, W 2015, 'Linking New Australian Alkali Silica Reactivity Tests to World-Wide Performance Data', Proceedings of the Biennial National Conference of the Concrete Institute of Australia in conjunction with the 69th RILEM Week, Concrete Institute of Australia - Biennial Conference, Concrete Institute of Australia, Melbourne, pp. 502-513.View/Download from: UTS OPUS
The long awaited Australian Standard test methods to detect alkali-silica reactivity (ASR) of aggregates: AS 1141.60.1 accelerated mortar bar test (AMBT) and AS 1141.60.2 concrete prism test (CPT); were published in September 2014. Both test methods were adopted correspondently from the ASTM 1260 and ASTM C1294 test methods but with different performance limits leading to a new class of slowly reactive aggregates. This paper reviews international and Australian research which supported these new performance limits. It also reviews and examines the value of these testing methods in predicting the ASR of aggregates in field-exposed large concrete blocks and a limited number of concrete structures. The outcomes may lead to a consideration of the hierarchy of these two test methods
Sirivivatnanon, V, South, W & Whitaker, C 2015, 'Merits and challenges of increasing limestone addition in cement used in concrete pavement construction', ASCP 2015 Concrete Pavements Conference, Coffs Harbour, Australia.
Portland cement has undergone much change in recent decades to cater for rapid construction cycles, longer design life and environmental pressure. Increased fineness, the advent of Portland blended cements incorporating one or more supplementary cementitious materials (SCMs), and reduced clinker content via mineral addition have been the key technological solutions to meet these demands. This paper examines how Portland cement with optimum limestone addition (designated Type GP in Australia) can be economically used to meet critical performance requirements, both in fresh and hardened state, in concrete pavement construction. Both Australian and international research and field data will be evaluated with respect to compliance to local Road Authorities specifications and service life. Recent field experience and challenges in placing these concretes using concrete paving machine will be discussed
Dumitru, I, Song, T, Bornstein, B & Sirivivatnanon, V 2013, 'Constraints in using manufactured sands in concrete pavements in Australia', Sustainable Construction Materials and Technologies.
© 2013 Sustainable Construction Materials and Technologies. All rights reserved. This paper documents some of the constraints in utilising larger proportions of manufactured sands in concrete pavements. These constraints, are caused mainly, by the current level of knowledge regarding the impact of manufactured sands on skid and abrasion resistance of concrete pavements. Due to shortages of natural sands, along the east coast of Australia in particular, and the need to fully utilise fines produced in quarry operations, progress has been made in utilising blends of manufactured sands and natural sands in concrete pavements. The paper presents a brief review of literature on this subject in USA, France and United Kingdom. It also, briefly, documents work recently carried out in Australia by CCAA (Cement Concrete & Aggregates Australia), referring to the skid and abrasion resistance of concrete pavements using manufactured sands. The paper concludes that, there is no relationship between free silica content and skid resistance. With regard to the abrasion resistance, it is rather the curing conditions and compressive strength that are more important in achieving good results.
Tan, EL, Thomas, C & Sirivivatnanon, V 2013, 'Finite element modelling of nonlinear behaviour of headed stud shear connectors in foamed and lightweight aggregate concrete', International Conference on Advances in Experimental Structural Engineering.
© 2013 Earthquake Engineering Research Institute. All rights reserved. Composite steel-concrete construction is used widely due to its ability to utilise the concrete's compressive strength and steel's tensile strength to increase the span to depth ratio, reduced deflections and higher stiffness ratio than traditional steel or reinforced concrete construction. This effectiveness is depended heavily on the shear connectors to transfer shear forces and prevent separation of both components. The introduction of lightweight system further reduces the dead load of the structures which are beneficial to the construction. However, there is limited research available regarding the application of lightweight concrete in composite steel-concrete construction. The aim of this paper is to investigate the structural behaviours of headed shear stud connectors in foamed and lightweight aggregate concrete in terms of their ultimate loads, stiffness and ductility using a finite element model. Their load-slip relationships were produced and compared with normal concrete. From the comparison, the stiffness of stud connectors in foamed and lightweight aggregate concrete was lower than those in normal concrete. The ductility of stud connectors varied depending on the types of concrete used. Most importantly, the ultimate shear capacity of stud connectors performed within 10% for both foamed and lightweight aggregate concrete as compared to normal concrete.
Lim, CC, Gowripalan, N & Sirivivatnanon, V 2006, 'Predicting chloride content profile in concrete using a concrete mix design parameter', Concrete Repair, Rehabilitation and Retrofitting - Proceedings of the International Conference on Concrete Repair, Rehabilitation and Retrofitting, ICCRRR 2005, pp. 125-127.
Many service life prediction models for concrete require information from existing structure, for example, chloride concentration value at a known depth in concrete and the period of chloride exposure before a prediction can be made. Those models are useful when dealing with service life of existing concrete structures. In the case of designing a new concrete structure for service life, the prediction may be hindered because the required field information is not available at the time of design. Hence, a model which can give an estimate of the service life of a structure at the design stage is necessary. In the present study, a chloride concentration prediction model based on a concrete mix design parameter is proposed. The model is developed based on results of chloride immersion tests conducted in a controlled laboratory environment. The model is verified using data obtained from the present study and from the literature. The model can reasonably predict the chloride concentration profile in Ordinary Portland Cement (OPC) concretes having a water to cement ratio between 0.40 and 0.67. © 2006 Taylor & Francis Group, London.
Sirivivatnanon, V & Cao, HT 1999, 'An engineered model for service life of marine concrete structures', DURABILITY OF BUILDING MATERIALS AND COMPONENTS 8, VOLS 1-4, PROCEEDINGS, pp. 94-103.
Sirivivatnanon, V & Khatri, RP 1999, 'Characterising chloride penetration resistance of concrete', DURABILITY OF BUILDING MATERIALS AND COMPONENTS 8, VOLS 1-4, PROCEEDINGS, pp. 386-398.
BAWEJA, D., SIRIVIVATNANON, V., GROSS, W. & LAURIE, G. 1994, 'High-performance Australian concretes for marine applications', HIGH-PERFORMANCE CONCRETE - PROCEEDINGS, ACI INTERNATIONAL CONFERENCE, pp. 363-377.
BAWEJA, D, ROPER, H, GUIRGUIS, S & SIRIVIVATNANON, V 1993, 'MEASUREMENT OF CORROSION OF STEEL REINFORCEMENT UNDER HIGH CHLORIDE CONDITIONS', FLY ASH, SILICA FUME, SLAG, AND NATURAL POZZOLANS IN CONCRETE, VOLS 1 AND 2, pp. 1543-1563.
Nelson, P, Sirivivatnanon, V & Khatri, R 1992, 'Development of high volume fly ash concrete for pavements', Proceedings - Conference of the Australian Road Research Board, pp. 37-47.
This paper describes the development of high volume fly ash (HVFA) concrete for pavements. Concretes with fly ash content (40% and above by weight of the total binder fractions) were designed for structural grades. The workability, mechanical and long-term volume stability properties were evaluated. It was found that HVFA concrete with characteristic compressive strength up to 50 MPa could be designed having fresh concrete properties similar to plain cement concrete with the exception of setting times. For concretes of similar strength grades, it was found that the flexural strength and elastic modulus properties of HVFA concretes were similar to plain cement concretes. HVFA concretes were found to have a 15-20% lower drying shrinkage at 56 days than companion plain cement concretes. These reductions increased to 15-25% at 91 days. The setting times were increased by one to six hours depending on the type of cement and percentage of fly ash used. The concretes also developed considerable strength after 24 hours to withstand loading from normal construction activities. Trial production and placing of these concretes for apron slabs and road pavements was carried out at the Pacific Power's Mount River Piper Station. It ws found that HVFA concrete could be produced and placed successfully through normal concreting practices including pumping. Long term performance of these concretes are being monitored.
SIRIVIVATNANON, V & CAO, HT 1991, 'THE NEED FOR AND A METHOD TO CONTROL CONCRETE COVER', QUALITY CONTROL OF CONCRETE STRUCTURES, pp. 237-246.