期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 161, 期 -, 页码 282-291出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2017.11.034
关键词
Cement-based grouts; Fly ash; Bentonite; Superplasticizer; Water glass; Fresh-state property; Mechanical property; Microstructure
资金
- National Basic Research Development Program of China (973 Program) [2013CB036001]
- national key research and development plan [2016YFC0801604, 2017YFC0703100]
- National Natural Science Foundation of China [51309146, 51709158]
- Major Basic Project of Shandong Provincial Natural Science Foundation of China [ZR2017ZC0734]
- Fundamental Research Funds of Shandong University [2016GN027]
To ensure desirable flowability, enough penetrability and less leaching of grouting materials in geotechnical engineering, the ASTM Type I Portland cement (PC), class F fly ash (FA), bentonite (B), superplasticizer (SP) and water glass were designed to improve properties of grouting materials in different aspects. The fresh-state properties i.e. flowability, spreading ability, bleeding and setting time; mechanical properties i.e. flexural strength and compressive strength; and microstructures of the cement-based grouts were investigated. The water/solid (WAS) ratio is selected as 1.0, the amounts of FA, bentonite and SP by mass of PC were 0-40%, 0-15% and 0.7%, respectively. The volume ratios of cement-based suspensions and water glass were selected as 1:1, 2:1 and 3:1. The results show that the FA and 0.7% SP enhance the flowability and spreading ability of fresh grouts, and the bentonite can enhance the stability. The effects of various FA, B, SP and water glass contents on flexural strengths of grouts are different. The class F FA, B and 0.7% SP reduce the compressive strength of hardened grouts. The performance of cement-based grouts with 20-30% class F FA, 0-5% bentonite, 0.7% SP and volume ratios of 2:1-3:1 can satisfy the requirements of high performance, environmental friendliness and low costs in geotechnical and underground engineering. (C) 2017 Published by Elsevier Ltd.
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