The effect of temperature on the compressive strength of concrete

Malhotra, H.L.

doi:10.1680/macr.1956.8.23.85

Cited by 197 publications

(54 citation statements)

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“…[7][8][9] The data used in these provisions are based on the results of research carried out by Kodur & Sultan, Lie and Sullivan et al, which was carried out by unstressed test and unstressed residual strength test methods. [11][12][13][14][15][16][17][18] These non-stressed test methods are mainly used to consider sufficient safety ratio, but the actual structure has design load, so depending on the loading conditions, thermal behavior of concrete may differ. Thus, interests in thermal properties of ordinary and high strength concrete by load condition are increasing, and by researchers such as Hetz, Phan and Anderberg, results of research on transient creep occurring under the loading condition are reported.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of light weight concrete at elevated temperature

Kim

Choe

Yoon

et al. 2015

Int. J. Precis. Eng. Manuf.

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This study provides an experimental investigation on the mechanical properties of concrete with thermal expansion at elevated temperatures. To understand the mechanical properties at elevated temperature, normal and light weight concrete of 60 MPa grade was exposed to temperature range 20 (room temperature) to 700ºC under 0.0 f cu (compressive strength of concrete at room temperature, f cu ), 0.2 f cu , 0.4 f cu load conditions and compressive strength, elastic modulus, thermal strain and creep at target temperature were inspected. Experimental results show that light weight concrete has higher compressive strength, although the strength of normal weight concrete degenerated more sharply than the light weight concrete at elevated temperature. Moreover, the thermal strain (0.0 f cu , unstressed) and total strain (0.2 and 0.4 f cu , stressed) of normal weight concrete was higher than that of light weight concrete. The result of creep test was shown similar tendency between normal weight concrete and light weight concrete less than 300ºC. Matrix damage induced by the thermal expansion of the aggregate significantly influenced on the mechanical properties degradation of concrete at high temperature.

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Section: Introductionmentioning

confidence: 99%

Mechanical properties of light weight concrete at elevated temperature

Kim

Choe

Yoon

et al. 2015

Int. J. Precis. Eng. Manuf.

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show abstract

“…(1) the specimens described in (a) above exhibited the highest strength, followed by specimens described in (b) then those described in (c) [17][18][19][20][21][22][23][24], (2) the apparent beneficial effect of compressive loading on the hot strength was due to the delay of micro-crack development and due to densification of the cement paste [17,18,31,32] (3) varying the amount of pre-load and the concrete compressive strength at room temperature did not significantly affect the results for the stressed specimens [20,24].…”

Section: Introductionmentioning

confidence: 96%

“…Several studies [17][18][19][20][21][22][23][24][25][26][27][28][29][30] have been conducted on the effect of elevated temperature on concrete strength which showed that that the general trend of the compressive strength decreases as the temperature is increased. For this purpose different scenarios were addressed with the specimens being tested using one or more of the following three combinations of heating and loading: (a) stressed during heating and tested at high temperature, (b) unstressed during heating and tested at high temperature, and (c) unstressed during heating and tested after cooling (i.e.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study of the behaviour of heat-damaged RC circular columns confined with CFRP fabric

Al-Kamaki

Al-Mahaidi

Bennetts

2015

Composite Structures

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“…[3]. Malhotra [4] highlighted the role of agg:c on the performance. It is also worth mentioning that the rate of change in properties are related to the heating rate that in turn is related to the way the heat is applied, test conditions, and the geometry of the concrete element(s).…”

Section: Introductionmentioning

confidence: 99%

Factors affecting the resistance of cementitious materials at high temperatures and medium[0] heating rates

2006

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The resistance of mortars made of dolomite and quartz aggregate with and without polypropylene fibers has been studied at a nominal heating rate of 30 • C/min from room temperature up to 1000 • C. It is demonstrated that the key parameters that affect the performance of plain mortars are volume instability, phase transformation, aggregate dissociation, and permeability. Experimental results point at the major role of aggregate type on mass loss, porosity, volume instability, microstructure, cracking pattern, and mechanical properties. Three thermal zones are identified; low (up to about 300 • C), intermediate (about 300 to 600 • C), and high (>600 • C). It is shown that in the low thermal zone, the mechanical properties are about the same or better than those at room temperature. The intermediate thermal zone is characterized by a moderate decline of mechanical properties, whereas a rapid decline is registered in the high thermal zone.Explosive spalling due to pressure built-up of volatiles took place at temperatures over 200 • C. Addition of polypropylene fibers prevents spalling due to the occurrence of porous and permeable interface between the fibers and the matrix rather than fiber shrinkage or melting.Résumé La résistance des mortiers produits par l´agrégat de dolomie et quartz avec et sans fibres polypropylènes aétéétudiéeà la proportion du chauffage 30 • C/min jusqu´à 1000 • C. Les paramètres essentiels influençant la résistence des mortiers simples sont : instabilité du volume, transformation de la phase, dissociation de l´agrégat et perméabilité. Les résultats expérimentaux révèlent l´influence importante du type de lágrégat sur la perte de poids, sur la poreusité, l´instabilité du volume, la microstructure, la fissure de la surface et les propriétés mécaniques. Trois zones thermiques ontété identifiées; basse (jusqu´à environ 300 • C), moyenne (environ 300 • C jusqu´à 600 • C) et haute (>600 • C). Il estévident que les propriétés mécaniques dans la zone thermique basse sont les mêmes sinon meilleures que celles de la température de chambre et la zone thermique moyenne est characterisée par une chute modérée des propriétés mécaniques et la chute rapide est enregistrée dans la zone thermique haute.La destruction explosive causée par la croissance de la pression des gaz s´est effectuée aux températures audessus de 200 • C. Des fibres polypropylènes empêchent la destruction explosive causée plutôt par l´occurrence de la jonction poreuse et perméable entre les fibres et la matrice que par la contraction ou la fonte des fibres.

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The effect of temperature on the compressive strength of concrete

Cited by 197 publications

References 0 publications

Mechanical properties of light weight concrete at elevated temperature

Mechanical properties of light weight concrete at elevated temperature

Experimental and numerical study of the behaviour of heat-damaged RC circular columns confined with CFRP fabric

Factors affecting the resistance of cementitious materials at high temperatures and medium[0] heating rates

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