X-ray micro-tomography investigation of the foaming process in the system of waste glass-silica mud-MnO2

被引:20
作者
Ducman, V. [1 ]
Korat, L. [1 ]
Legat, A. [1 ]
Mirtic, B. [2 ]
机构
[1] ZAG Ljubljana, Ljubljana 1000, Slovenia
[2] NTF, Ljubljana 1000, Slovenia
关键词
Lightweight aggregate; Porosity; X-ray micro-tomography (mu-CT); SEWAGE-SLUDGE; LIGHTWEIGHT;
D O I
10.1016/j.matchar.2013.10.021
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In case of foamed lightweight aggregates (LWAs), porosity is introduced by the addition of a foaming agent to the glassy matrix, which degasses at an elevated temperature, so that the resulting gases remain trapped inside the glassy structure. The efficiency of action of MnO2 as a foaming agent in waste glass and waste glass/silica mud systems was studied. Samples were fired at different temperatures and with different dwelling times at a certain temperature, and the development of porosity was investigated by means of X-ray micro-tomography. It was found that, with the prolongation in dwelling times, the number of pores decreased, while, on the other hand, the volume of these pores increased, and that the addition of silica mud increases the foaming temperature and slows down the foaming process. (C) 2013 Elsevier Inc. All rights reserved.
引用
收藏
页码:316 / 321
页数:6
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