Concrete with Highly Active Rice Husk Ash

武汉理工大学学报-材料科学版(英文版), 2004, 19(3): 74-77.

^1, , ^2, , ^3, , ^4, , ^5, , ^6,

1.Hachinohe Institute of Technology(Japan);Guangxi University

2.Guangxi University

3.South China University of Technology

4.South China University of Technology

5.Guangxi University

6.Hachinohe Institute of Technology(Japan)

基金项目: 国家高技术研究发展计划(863计划)(2002AA3350) 中南大学校科研和教改项目(D6580)

Concrete with Highly Active Rice Husk Ash

Keywords： rice husk ash

The overall aim was to investigate the effect of highly active rice husk ash (RHA) produced by an industrial furnace on some properties of concrete. The strength, pore volume and pore distribution of concrete and the Ca(OH)2 content in concrete were investigated by JIS A 1108 (Method of test for compressive strength of concrete), a mercury instrument porosimeter, and the thermogravimetric analysis, respectively. The results show that,with RHA replacement of cement,the compressive strength of concrete is increased evidently;the average pore radius of concrete is greatly decreased, especially the portion of the pores greater than 20nm in radius is decreased while the amount of smaller pores is increased, and the more the RHA replacement, the less the amount of Ca(OH)2 in concrete. The latter two results are the main reasons for the strength enhancement of concrete.

参考文献

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Concrete with Highly Active Rice Husk Ash

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