TITLE:
A Comparative Study of Concretes Containing Crushed Limestone Sand and Natural Sand
AUTHORS:
Yeol Choi, Jae-Hyuk Choi
KEYWORDS:
NSC; CLSC; High-Temperature; Fine Aggregate; Compressive Strength
JOURNAL NAME:
Open Journal of Civil Engineering,
Vol.3 No.1,
March
29,
2013
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.