文献类型：期刊文献

英文题名：Creep analysis of concrete containing rice husk ash

作者：He, Zhi-hai[1,2];Li, Long-yuan[2];Du, Shi-gui[1]

机构：[1]Shaoxing Univ, Coll Civil Engn, Shaoxing 312000, Peoples R China;[2]Univ Plymouth, Sch Marine Sci & Engn, Plymouth PL4 8AA, Devon, England

年份：2017

卷号：80

起止页码：190

外文期刊名：CEMENT & CONCRETE COMPOSITES

收录：SCI-EXPANDED(收录号：WOS:000403123000018)、、EI(收录号：20171303499296)、Scopus(收录号：2-s2.0-85016018370)、WOS

基金：The authors would like to acknowledge the National Natural Science Foundation of China (Grant No. 41427802 and 51602198) and the Shaoxing University Scientific Research Project (Grant No. 20145030) for their financial support to the work present in this paper.

语种：英文

外文关键词：Concrete; Rice husk ash; Compressive strength; Elastic modulus; Creep

外文摘要：This paper presents an experimental study on the mechanical properties of concrete added with rice husk ash (RHA) as a supplementary cementitious material. The compressive strength, modulus of elasticity and creep were obtained experimentally from specimens with different RHA contents (0%, 10%, 15% and 20% of binder). The results show that the addition of RHA in concrete can improve both the compressive strength and modulus of elasticity and reduce the creep of concrete. The examination of pore micro-structure of hardened concrete using both the mercury intrusion porosimetry and scanning electron microscope techniques demonstrates that RHA particles can react with calcium hydroxide originated from cement hydration to produce additional C-S-H, which can fill voids and large pores and thus reduces the porosity related to capillary pores and voids. In addition, the release of absorbed water, which is retained in the small pores of RHA particles at early days, can improve cement hydration and thus reduce the porosity related to gel pores. (C) 2017 Elsevier Ltd. All rights reserved.