Mechanical Properties of Engineered Cementitious Composites Prepared with Sand in Ulanbuh Desert

Abstract

Abstract: Engineered cementitious composites (ECC) were completely replaced by Ulanbuh desert sand from Inner Mongolia to conduct a comprehensive study on the mechanical properties of its compressive strength, tensile strength, shear strength and flexural strength. The sand-binder ratio was set as the variable. X-ray diffraction (XRD) was employed in this study to analyze the composition of the desert sand, and scanning electron microscope (SEM) was used to observe the cross section of fiber after the tensile test. The results show that the compressive strength, tensile strength, shear strength and flexural strength of the ECC prepared with desert sand are similar to the ECC prepared with microsilica sand, and the ductility of desert sand ECC is about half of microsilica sand. Except for the shear strength, all of other properties of desert sand ECC are improved with the increase of sand-binder ratio. The ductility of desert sand ECC designed with optimized mix proportion reaches the level of the microsilica sand ECC.

Key words: engineered cementitious composite (ECC), aggregate, desert sand, mechanical property, cementitious material, multiple cracking

CLC Number:

TU528.58

LI Zuo, YAO Qiyao, ZHU Shengyan, GUO Xinhua, PENG Linxin, TENG Xiaodan, LUO Yuejing. Mechanical Properties of Engineered Cementitious Composites Prepared with Sand in Ulanbuh Desert[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(4): 1103-1115.

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