Microstructural evolution of cemented paste backfill: Mercury intrusion porosimetry test results

被引：173

作者：

Ouellet, Serge

Bussiere, Bruno

Aubertin, Michel

Benzaazoua, Mostafa

机构：

[1] Univ Quebec, Quebec City, PQ J9X 5E4, Canada

[2] Ecole Polytech, Montreal, PQ H3C 3A7, Canada

[3] GENIVAR, Quebec City, PQ J9P 5H4, Canada

来源：

CEMENT AND CONCRETE RESEARCH | 2007年 / 37卷 / 12期

基金：

加拿大自然科学与工程研究理事会;

关键词：

cemented paste backfill; microstructure; mercury porosimetry; compressive strength; mine wastes management;

D O I：

10.1016/j.cemconres.2007.08.016

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The microstructural evolution of different cemented paste backfill (CPB) samples made with ground silica was evaluated using mercury intrusion porosimetry (MIP). The influence of three binders (OPC, OPC with fly ash, and OPC with blast furnace slag) and of three types of water (one deionised and two sulphated) on the microstructure was studied over the curing time. Uniaxial compressive strength (UCS) tests were also performed to relate MIP results to the backfill mechanical strength. Among other findings, the MIP analyses indicate that the slag based binder combined with a mixing water having a high sulphate content (of 7549 ppm) showed the highest percentage of fine pores and the highest strength. This behaviour is related to the potential precipitation of sulphate phases in pores, which may contribute to strength enhancement. Based on MIP pore size distributions and UCS results, the authors propose a general relationship applicable for CPB. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：1654 / 1665

页数：12

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