Understanding the effect of porosity on the mechanical and thermal performance of glass foam lightweight aggregates and the influence of production factors

被引：44

作者：

Arriagada, Cristina ^{[1
]}

Navarrete, Ivan ^{[1
]}

Lopez, Mauricio ^{[1
,2
]}

机构：

[1] Pontificia Univ Catolica Chile, Sch Engn, Dept Construct Engn & Management, 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 | 2019年 / 228卷

关键词：

Porosity; Porous aggregates; Lightweight concrete; Mechanical strength; Thermal conductivity; Glass foam; CONCRETE; CONDUCTIVITY; STRENGTH; SIZE;

D O I：

10.1016/j.conbuildmat.2019.116746

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The presence of lightweight aggregates (LWAs) in concrete reduces the density and thermal conductivity of concrete at the expense of its mechanical strength. This research quantifies the influences of the pore structure, characterized using micro computed tomography (mu-CT), on the thermal and mechanical performance of 38 types of LWAs made with glass foam from recycled glass. A higher porosity and smaller pore size distribution allow the achievement of higher mechanical strength and lower thermal conductivity. Such a pore structure can be obtained by reducing the size of the particles of the foaming agent and by increasing the temperature of the expansion process. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页数：12

共 42 条

[1] Thermal-resistant lightweight concrete with polyethylene beads as coarse aggregates [J].