Influence of the surface roughness of crushed natural aggregates on the microhardness of the interfacial transition zone of concrete with mineral admixtures and polymer latex

被引：61
作者：
Qudoos, Abdul [1 ]
Atta-ur-Rehman [1 ]
Kim, Hong Gi [1 ]
Ryou, Jae-Suk [2 ]
机构：
[1] Civil & Environm Engn Dept, Room 415,Jaesung Civil Engn Bldg,222 Wangsimni Ro, Seoul, South Korea
[2] Civil & Environm Engn Dept, Room 404,Jaesung Civil Engn Bldg,222 Wangsimni Ro, Seoul, South Korea
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2018年 / 168卷
关键词：
Surface roughness; Interfacial transition zone; Microstructure; Supplementary cementitious materials; Polymers; SEM-EDS; SILICA FUME; CEMENT PASTE; FLY-ASH; ITZ; STRENGTH; MICROSTRUCTURE; MACROLEVEL; METAKAOLIN; MORTARS; MICRO;
D O I：
10.1016/j.conbuildmat.2018.02.205
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Aggregate surface roughness has a significant effect on the interfacial transition zone of concrete. For this study, concrete specimens were prepared from five crushed natural coarse aggregates with varying surface roughnesses obtained from five different sources. The influence of polymer latex and mineral admixtures such as metakaolin, silica fume, slag, and fly ash were also studied. The effect of surface roughness on the interfacial transition zone was characterized by microhardness testing. The microhardness test results were validated via energy-dispersive X-ray spectroscopy (EDS) and scanning electron microscopy (SEM) analysis. The results showed that surface roughness has a prominent effect on microhardness of the transition zone and the effect significantly increases with the addition of cementitious materials. Polymer latex showed a slight influence on the microhardness while the effect of cementitious materials was found to be profoundly increased. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码：946 / 957
页数：12
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