Title:
Mechanical Performances of Concrete Produced with Desert Sand After Elevated Temperature
Author(s):
Haifeng Liu, Xiaolong Chen, Jialing Che, Ning Liu, Minghu Zhang
Publication:
IJCSM
Volume:
14
Issue:
Appears on pages(s):
Keywords:
concrete, desert sand, prismatic compressive strength, cubic compressive strength, elasticity modulus
DOI:
10.1186/s40069-020-00402-3
Date:
7/30/2020
Abstract:
Currently, fre in building is one of the most serious disasters. With the increase of basic construction items in western
China, ordinary medium sand resource no longer met with the need of engineering. Compressive strength experiments of concrete produced with desert sand after elevated temperature were carried out in this paper. The efects of
desert sand replacement rate (DSRR), temperature and cooling regime on the mechanical performances of concrete
produced with desert sand were analyzed. XRD and SEM experiments were also conducted to study the microstructure of concrete produced with desert sand after elevated temperature. Experimental results showed that the cubic
compressive strength of concrete produced with desert sand increased frstly, and then declined with temperature.
Whereas, the prismatic compressive strength and elasticity modulus of concrete produced with desert sand under
static compression declined with temperature. With the enhancement of DSRR, the elasticity modulus under static
compression, cubic compressive strength and prismatic compressive strength of concrete produced with desert sand
after elevated temperature increased frstly, and then declined, the maximum value of which was reached when DSRR
amounted to 40%. Regression models were established to predict the mechanical performances of concrete produced with desert sand after elevated temperature, which were in good agreement with experimental results.