Understanding the relationship between the segregation of concrete and coarse aggregate density and size

被引：48

作者：

Navarrete, Ivan ^{[1
]}

Lopez, Mauricio ^{[1
,2
]}

机构：

[1] Pontificia Univ Catolica Chile, Dept Construct Engn & Management, Sch Engn, Vicuna Mackenna 4860,Casilla 306,Correo 22, Santiago, Chile

[2] Pontificia Univ Catolica Chile, Ctr Sustainable Urban Dev CEDEUS, Santiago, Chile

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2017年 / 149卷

关键词：

Fresh concrete; Vibration; Aggregate size; Aggregate density; Segregation rate; Image analysis; Stereology; RHEOLOGICAL PROPERTIES; LIGHTWEIGHT AGGREGATE; VIBRATION; STABILITY;

D O I：

10.1016/j.conbuildmat.2017.05.185

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Segregation of aggregate, which ultimately influences the strength and durability of concrete, is one of the major problems during construction. Two factors and their effects on the segregation of fresh concrete under vibration were studied. Based on the statistical analysis of the experimental results, it was concluded that the observed rate of segregation is an intrinsic property of concrete and is independent of the vibration time applied. The segregation tendency of a concrete mixture is mainly explained by the interaction between the specific surface of coarse aggregate and the difference in density between the aggregate and mortar phase rather than by each individual factor independently. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：741 / 748

页数：8

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