期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 107, 期 -, 页码 95-102出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2015.12.013
关键词
Alkali activated cement; Fly-ash based cement; Micromechanics; Mechanical properties; Nanoindentation
资金
- Khon Kaen University
- Thailand Research Fund (TRF) under the TRD Senior Research Scholar [RTA5780004]
This paper presents mechanical and micromechanical properties of alkali activated fly-ash cement (AAFA) based on statistical analysis with nano-indentation test. Mix proportions of AAFA are designed using Taguchi's approach. Four variables viz, silica fume (SF), sand to cementitious material ratio (sic), liquid to solid ratio (1/s) and superplasticiser (SP) content were the parameters tested. Indentation elastic modulus, hardness and packing density are studied. The results show that the increase in sand has the greatest contribution to the increase in density. For compressive strength, normal paste without SF, sand and SP with Vs of 0.6 gives the highest strength and the increase in SF significantly contributes to the adverse effect on compressive strength. For the indentation data, the analysis using deconvolution technique confirms the four phases of reaction products of AAFA. The main phase is sodium aluminosilicate hydrate (N-A-S-H), which is over 40% of the volume fraction. The microporomechanics of AAFA paste and mortar also demonstrate the relationships between the N-A-S-H volume fraction and strength; and activation degree and strength. (c) 2015 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据