Effects of limestone fines on water film thickness, paste film thickness and performance of mortar

被引：81
作者：
Kwan, A. K. H. [1 ]
McKinley, M. [1 ]
机构：
[1] Univ Hong Kong, Dept Civil Engn, Hong Kong, Hong Kong, Peoples R China
来源：
POWDER TECHNOLOGY | 2014年 / 261卷
关键词：
Filler; Limestone fines; Mortar; Packing density; Paste film thickness; Water film thickness; PARTICLE-SIZE DISTRIBUTION; SOLID-SURFACE AREA; PACKING DENSITY; EXCESS WATER; CEMENT; RHEOLOGY; FILLER; CONCRETE; SAND; FLOW;
D O I：
10.1016/j.powtec.2014.04.027
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The addition of limestone fines (LF) to mortar or concrete can improve the performance of the mortar or concrete. However, the effects of adding LF appear to be dependent on the water content and paste volume, and thus it is not easy to comprehend how LF actually works. Herein, it is postulated that the effects of LF are caused by the corresponding changes in water film thickness (WFT) and paste film thickness (PFT). To study the effects of LF, a series of mortar mixes with different paste volumes and LF contents have been tested for their packing density, flowability, cohesiveness and strength. From the packing density results, the WFT and PFT of the mortar mixes were calculated and the measured properties of the mortar mixes were correlated to the WFT and PFT. It was found that the WFT and PFT are the major factors governing the performance of mortar and the effects of LF are caused by the decrease in WFT and the increase in PFT due to the addition of LF. (C) 2014 Elsevier B.V. All rights reserved.
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页码：33 / 41
页数：9
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