Early age volume change of cement asphalt mortar in the presence of aluminum powder

被引：57

作者：

Wang, Fazhou ^{[1
]}

Liu, Zhichao ^{[1
]}

Hu, Shuguang ^{[1
]}

机构：

[1] Wuhan Univ Technol, Minist Educ, Key Lab Silicate Mat Sci & Engn, Wuhan 430070, Peoples R China

来源：

MATERIALS AND STRUCTURES | 2010年 / 43卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Cement asphalt mortar; Volume change; Aluminum powder; Temperature;

D O I：

10.1617/s11527-009-9505-z

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Cement asphalt mortar (CA mortar) is a highly flowable grouting material used in the slab track structure. CA mortar is required to possess a volume expansion rate of 1.0-3.0% after 24 h to guarantee a desired filling effect. This is achieved by the incorporation of aluminum powder (AP). The article investigates the volume change of CA mortar under various AP dosages, temperatures and asphalt emulsion/cement ratio (A/C). Results indicate that when AP is absent, volume shrinkage of 1.8-3.0% is noted at temperatures of 10-30A degrees C; upon the addition of 0.013-0.021% AP, CA mortar undergoes slight volume shrinkage before 4 h, and then keeps expanding until about 24 h after which volume expansion slows down gradually; the expansion rate of CA mortar is greater, the lower the temperature is, and also the higher A/C is.

引用

页码：493 / 498

页数：6

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