A Comparative Study of Concretes Containing Crushed Limestone Sand and Natural Sand

Yeol Choi, Jae-Hyuk Choi

Department of Architecture, Chosun University, Gwangju, Korea.
School of Architecture & Civil Eng., Kyungpook National University, Daegu, Korea.

DOI: 10.4236/ojce.2013.31003                

Abstract

This paper describes the effects of high temperatures on the strength characteristic of crushed limestone sand concrete (CLSC). To compare, natural (river) sand concrete (NSC) and CLSC specimens were exposed to the three different high temperatures. Visual color-change and weight loss were also carefully examined through the tests. The test results indicated that the decreasing rate of compressive strength of CLSC after exposure to high temperature is slightly lower than that of NSC while the splitting tensile strength of CLSC indicated a very similar rate compared to NSC. Therefore, the strength variations of crushed limestone sand concrete after exposal to high temperature can be similarly treated as that of the natural sand concrete. Also it can be seen that the CLSC can use 0.5 power law equation to represent the relationship between compressive and splitting tensile strength before and after exposal to high temperature.

Keywords

NSC; CLSC; High-Temperature; Fine Aggregate; Compressive Strength

Conflicts of Interest

The authors declare no conflicts of interest.

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