Effect of rice husk ash fineness on porosity and hydration reaction of blended cement paste

被引：82

作者：

Xu, Weiting ^{[1
]}

Lo, Yiu Tommy ^{[2
]}

Ouyang, Dong ^{[3
]}

Memon, Sharzim Ali ^{[2
]}

Xing, Feng ^{[1
]}

Wang, Weilun ^{[1
]}

Yuan, Xiongzhou ^{[1
]}

机构：

[1] Shenzhen Univ, Coll Civil Engn, Guangdong Prov Key Lab Durabil Marine Civil Engn, Shenzhen, Peoples R China

[2] City Univ Hong Kong, Dept Architectural & Civil Engn, Hong Kong, Hong Kong, Peoples R China

[3] Jinan Univ, Coll Sci & Engn, Dept Mech & Civil Engn, Guangzhou, Guangdong, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2015年 / 89卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Rice husk ash; Grinding fineness; Hydration reaction; Porosity; FLY-ASH; CONCRETE; STRENGTH; RESISTANCE; ADDITIONS;

D O I：

10.1016/j.conbuildmat.2015.04.030

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

An experimental investigation on the effect of grinding fineness of rice husk ash (RHA) on the mechanical, hydration and porosity properties of RHA blended paste was launched. Locally produced RHA with six different grinding durations of 5, 10, 30, 60, 90 and 120 min corresponding to mean particle size of 8.61, 8.15, 5.45, 6.25, 638 and 6.95 mu m, respectively, were used in this study. The physical and chemical properties of the ground RHAs were determined and results show that variations in chemical composition of RHAs with different grinding fineness are small. The pastes with water binder ration of 0.4 and cement substitution of 10% by ground RHAs were tested. Comparisons between pastes with SF, and control paste (only with ordinary Portland cement) were also presented. Mechanical properties, hydration reaction and porosity of paste were investigated by compressive strength, thermogravimetric analysis (TGA) and environment scanning electron microscope (ESEM) plus Image Pro Plus software analysis, respectively. Results show that incorporation of 30-min grinding RHA exhibits a strong, high hydration and low porosity paste due to the better dispersion, filling effect and pozzolanic activity. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：90 / 101

页数：12

共 28 条

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