Differential scanning calorimetry evaluation of autoclaved cement based building materials made with construction and demolition waste

被引:24
|
作者
Klimesch, DS [1 ]
Ray, A [1 ]
Guerbois, JP [1 ]
机构
[1] Univ Technol Sydney, Dept Chem Mat & Forens Sci, Sydney, NSW, Australia
关键词
autoclaving; DSC; tobermorite; construction and demolition waste; mullite;
D O I
10.1016/S0040-6031(02)00058-8
中图分类号
O414.1 [热力学];
学科分类号
摘要
The effect of adding finely ground construction and demolition (C&D) waste fines, containing a significant amount of clay-brick, to mixtures of Portland cement and quartz sand autoclaved at 180 degreesC was investigated by DSC. The incorporation of up to 41.25 mass% C&D waste fines enhanced the formation of aluminium-substituted tobermorite indicating that the mullite in the clay-brick fines is reactive under autoclaving conditions and supplied the aluminium required for the formation of this critical phase. C&D waste fine additions in excess of 41.25 mass% promoted the formation of aluminium-substituted C-S-H, over aluminium-substituted tobermorite. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:195 / 198
页数:4
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