Utilization of miscanthus combustion ash as internal curing agent in cement-based materials: Effect on autogenous shrinkage

被引：12
|
作者：
Lv, Yang [1 ,2 ]
Ye, Guang [2 ,3 ]
De Schutter, Geert [2 ]
机构：
[1] Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Hubei, Peoples R China
[2] Univ Ghent, Dept Struct Engn, Magnet Lab Concrete Res, Technol Pk,Zwijinaarde 904, B-9052 Ghent, Belgium
[3] Delft Univ Technol, Fac Civil Engn & Geosci, NL-2600 GA Delft, Netherlands
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2019年 / 207卷
关键词：
Biomass ash; Autogenous shrinkage; Self-desiccation; Mitigation; RICE-HUSK ASH; POZZOLANIC ACTIVITY; BAGASSE ASH; PERFORMANCE; CONCRETE; PASTE;
D O I：
10.1016/j.conbuildmat.2019.02.167
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The present study aims to evaluate the characterization of combustion ash of miscanthus and its possible application for self-desiccation and autogenous shrinkage mitigation in cement-based materials. Comprehensive tests were performed on the sealed samples to evaluate the behavior of self-desiccation and autogenous shrinkage of low water/binder ratio (0.25) cement pastes blended with miscanthus ash (MA). The lab-generated MA is featured by high content of amorphous silica and porous structure. Its porous structure with pore size distribution mainly within the range of 30-50 nm in diameter makes it a potential internal curing agent for self-desiccation and autogenous shrinkage mitigation. Incorporation of 20% by weight MA into cement paste shows high efficiency in self-desiccation mitigation, contributing to the significantly reduced autogenous shrinkage. Decreasing the mean particle size from 20.43 mu m to 6.67 mu m lowers the self-desiccation mitigation efficiency of biomass ash MA in the blended cement pastes. (C) 2019 Published by Elsevier Ltd.
引用
收藏
页码：585 / 591
页数：7
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