Young’s modulus and Poisson’s ratio of concrete at high temperatures: Experimental investigations

Bahr, Oliver; Schaumann, Peter; Bollen, B.; Bracke, J.

doi:10.1016/j.matdes.2012.07.070

Cited by 76 publications

(45 citation statements)

References 7 publications

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“…Also, due to the flat surface of the specimens, transverse strains were measurable. This measurement allows Poisson relations to be investigated, which to date have been noted as entirely inconclusive or lacking in literature [13,54]. Therefore this section provides novel discussion to these modelling parameters offering significant insights.…”

Section: Insights Into Modelling At-elevated Temperature Mechanical Pmentioning

confidence: 99%

Fire Performance of Sustainable Recycled Concrete Aggregates: Mechanical Properties at Elevated Temperatures and Current Research Needs

et al. 2015

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The materials used for the construction of buildings are changing. There are now many sustainability drivers for developing novel green construction materials. An emerging material used for building construction is concrete with conventional coarse aggregates substituted as recycled concrete aggregates (RCA). This is a form of sustainable concrete. A finite number of buildings (>10) with this material have been constructed in North America, Europe and Asia. However; to help facilitate wide spread use and development of sustainable concrete with RCA, there is purpose in considering this material's at-elevated temperature (in-fire) mechanical properties. To date, this topic has seen limited research attention as it is difficult to study. The study herein considered the mechanical properties of conventional and sustainable concrete with RCA. The only difference between the conventional and the sustainable concrete mixes was the mass proportion of a conventional natural coarse aggregate, Limestone, which had been substituted with coarse RCA (at replacement proportions of 0%, 30% and 100%). Both the ambient and elevated temperature mechanical properties were considered with compressive mechanical tests using an innovative optical technology for strain measurement. Based on the analysis performed, a proportional decrease in retained strength and elasticity of concrete at-elevated temperature with increasing RCA content was observed. For example both mechanical properties showed a 0.2% decrease in retained value for every 1% RCA increase at 500°C. In addition the modelling parameter of Poisson ratio appeared to be influenced by the heat imposed and the aggregate type contained within the concrete. For example at 500°C, this parameter showed an 73% increase for concrete samples with only Limestone aggregate and a 15% decrease for samples with only RCA (of mixed origin primarily Siliceous). This paper concludes with highlighting current knowledge gaps and research needs that when addressed could help improve the facilitation of using sustainable concrete's with RCA in construction of buildings.

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Section: Insights Into Modelling At-elevated Temperature Mechanical Pmentioning

confidence: 99%

Fire Performance of Sustainable Recycled Concrete Aggregates: Mechanical Properties at Elevated Temperatures and Current Research Needs

et al. 2015

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“…In case of fire or severe nuclear accident, concrete is subjected to elevated temperature that induces dramatic physical and chemical changes, leading to material deterioration: strength and stiffness decrease [2], cracking, and in certain circumstances spalling can occur [3]. Up to now, the effect of high temperatures on NSC and HSC has been studied extensively.…”

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confidence: 99%

Mechanical and physicochemical properties of ferro-siliceous concrete subjected to elevated temperatures

Chu

Jiang

Sun

et al. 2016

Construction and Building Materials

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“…Even though these static testing methods are usually used for CSM characterization, there are several problems in doing so. First of all, the results quality depends on the rate of loading, deformation effects and stress level at which elastic properties are determined [6]. Cement stabilized materials are porous so the applied forces during the compressive strength test crush the material and change its porosity even at lower rates of stress then the prescribed 30% of r u .…”

Section: Static Modulus Of Elasticity According To En 13286-43mentioning

confidence: 99%

Characterization of hydraulically bound base materials through digital image correlation

Barišić

Dokšanović

Draganić

2015

Construction and Building Materials

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Young’s modulus and Poisson’s ratio of concrete at high temperatures: Experimental investigations

Cited by 76 publications

References 7 publications

Fire Performance of Sustainable Recycled Concrete Aggregates: Mechanical Properties at Elevated Temperatures and Current Research Needs

Fire Performance of Sustainable Recycled Concrete Aggregates: Mechanical Properties at Elevated Temperatures and Current Research Needs

Mechanical and physicochemical properties of ferro-siliceous concrete subjected to elevated temperatures

Characterization of hydraulically bound base materials through digital image correlation

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