Effects of accelerator-water reducer admixture on performance of cemented paste backfill

被引：37
|
作者：
Liu, Yin [1 ]
Li, Hao [1 ]
Wang, Kai [1 ]
Wu, Haifeng [1 ]
Cui, Boqiang [1 ]
机构：
[1] Shandong Univ Sci & Technol, Coll Min & Safety Engn, 579 West Qiangang Rd, Qingdao 266590, Shandong, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2020年 / 242卷
关键词：
CPB; Accelerator; Water reducer ettringite; Calcium-silicate-hydrate; COMPRESSIVE STRENGTH; SUPERPLASTICIZER; MICROSTRUCTURE; HYDRATION; ADSORPTION;
D O I：
10.1016/j.conbuildmat.2020.118187
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
In this study, the effects of using an accelerator-water reducer admixture on the working performance of cemented paste backfill (CPB) were studied experimentally. Specifically, Na2SO4 was mixed with one of two different water reducers, namely, a polycarboxylate-based superplasticizer (PCS) and a naphthalene-based superplasticizer (NS). The effects of complex mixing were evaluated through macroscopic and microscopic tests. The results showed that, using an admixture of 0.5% Na2SO4 with 0.2% PCS or 0.5% Na2SO4 with 0.5% NS for preparing the CPB results in low cement consumption, good fluidity, short setting time, high water-reduction rate, and high UCS. (C) 2020 Elsevier Ltd. All rights reserved.
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页数：10
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