Compressive Strength Development and Microstructure of Cement-asphalt Mortar  

作　　者：王强 阎培渝 

机构地区：[1]Department of Civil Engineering,Tsinghua University

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2011年第5期998-1003,共6页武汉理工大学学报（材料科学英文版）

基　　金：Funded by National Natural Science Foundation of China (No.50802050);the Key Research and Development Program of Chinese Ministry of Railway (No.2008G031-18-6)

摘　　要：The compressive strength developing process and the microstructure of cement-asphalt mortar （CA mortar） were investigated.The fluidity of CA mortar has a great influence on its strength.The optimum value of spread diameter of slump flow test is in the range of 300 to 400 mm.The compressive strength of CA mortar keeps a relatively high growth rate in 56 days and grows slowly afterwards.The residual water of hydration in CA mortar freezes under minus environmental temperature which can lead to a significant reduction of the strength of CA mortar.Increasing A/C retards asphalt emulsion splitting and thus prolongs the setting process of CA mortar.The hydration products of cement form the major structural framework of hardened CA mortar and asphalt is a weak phase in the framework but improves the viscoelastic behavior of CA mortar.Therefore,asphalt emulsion should be used as much as possible on the condition that essential performance criterions of CA mortar are satisfied.The compressive strength developing process and the microstructure of cement-asphalt mortar （CA mortar） were investigated.The fluidity of CA mortar has a great influence on its strength.The optimum value of spread diameter of slump flow test is in the range of 300 to 400 mm.The compressive strength of CA mortar keeps a relatively high growth rate in 56 days and grows slowly afterwards.The residual water of hydration in CA mortar freezes under minus environmental temperature which can lead to a significant reduction of the strength of CA mortar.Increasing A/C retards asphalt emulsion splitting and thus prolongs the setting process of CA mortar.The hydration products of cement form the major structural framework of hardened CA mortar and asphalt is a weak phase in the framework but improves the viscoelastic behavior of CA mortar.Therefore,asphalt emulsion should be used as much as possible on the condition that essential performance criterions of CA mortar are satisfied.

关 键 词：asphalt emulsion compressive strength CA mortar MICROSTRUCTURE 

分 类 号：TQ172.1[化学工程—水泥工业]