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Title |
A Study on Properties of Concrete Made of Natural and Crushed Sand in High Temperatures
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Keywords |
자연모래 ; 부순모래 ; 고온 ; 중량손실 ; 잔존강도 natural sand ; crushed sand ; high temperature ; mass loss ; residual strength |
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Abstract |
The main object of this paper is to investigate the effects of high temperatures on the physical and mechanical properties of natural sand concrete(NSC) and crushed sand concrete(CSC). Test samples were exposed to high temperature ranging from 200°C to 800°C. After exposure, various tests were conducted. Color image analysis and weight losses were determined and compressive strength test and splitting tensile strength test were conducted. The results indicated that weight losses increased as exposure temperature increased with comparable decreasing rate. The results also showed that compressive strength and splitting tensile strength and modulus of elasticity decreased as exposure temperature increased. The results also showed that residual compressive strength of NSC decreased more drastically than that of CSC at 200°C and 400°C. Residual splitting tensile strength of NSC decreased more than that of CSC at 200°C, while NSC and CSC showed comparable residual strength ratio at 800°C.
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