Bloating mechanism in lightweight aggregates: Effect of processing variables and properties of the vitreous phase

被引：27

作者：

Molinari, Chiara ^{[1
]}

Zanelli, Chiara ^{[1
]}

Guarini, Guia ^{[1
]}

Dondi, Michele ^{[1
]}

机构：

[1] CNR ISTEC, Ist Sci & Tecnol Mat Ceram, Via Granarolo 64, Faenza, Italy

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2020年 / 261卷

关键词：

Lightweight aggregates; Glass Scraps; Waste management; Bloating; Scale-up; THERMAL-CONDUCTIVITY; GLASS-CERAMICS; PARTICLE-SIZE; WASTE GLASS; FOAM-GLASS; CALCIUM-CARBONATE; SURFACE-TENSION; VISCOSITY; BEHAVIOR; MICROSTRUCTURE;

D O I：

10.1016/j.conbuildmat.2020.119980

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The firing behaviour of five waste glasses was studied to define key parameters able to predict bloating performances in industrial lightweight aggregates production. Bloating was investigated by hot-stage microscopy and laboratory kiln experiments, also with SiC as expanding agent. In-situ and ex-situ results were contrasted to shed light on the scale up process. Both macro- and microstructure of aggregates are related to the melt properties and crystallization phenomena. A phenomenological model for SiC-induced expansion was proposed. The glass chemical composition controls melt viscosity and kinetics of expansion, while the increase of aggregate size fosters the extent of bloating. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页数：12

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