标题：Experimental study and field application of calcium sulfoaluminate cement for rapid repair of concrete pavements
作者：Guan Yanhua;Gao Ying;Sun Renjuan;Won Moon C;Ge Zhi
作者机构：[Guan, Y] Department of Transportation Engineering, School of Civil Engineering, Shandong University, Jinan, 250061, China;[ Gao, Y] Department of Tra 更多
通讯作者地址：[Sun, RJ]Shandong Univ, Sch Civil Engn, Dept Transportat Engn, Jinan 250061, Shandong, Peoples R China.
关键词：Calcium Sulfoaluminate (CSA) cement;Type Ⅲ cement;coefficient of thermal expansion (CTE);shrinkage;rapid repair
摘要：The fast-track repair of deteriorated concrete pavement requires materials that can be placed,cured,and opened to the traffic in a short period.Type Ⅲ cement and Calcium Sulfoaluminate (CSA) cement are the most commonly used fast-setting hydraulic cement (FSHC).In this study,the properties of Type Ⅲ and CSA cement concrete,including compressive strength,coefficient of thermal expansion (CTE) and shrinkage were evaluated.The test results indicate that compressive strength of FSHC concrete increased rapidly at the early age.CSA cement concrete had higher early-age and long term strength.The shrinkage of CSA cement concrete was lower than that of Type Ⅲ cement concrete.Both CSA and Type Ⅲ cement concrete had similar CTE values.Based on the laboratory results,the CSA cement was selected as the partial-depth rapid repair material for a distressed continuously reinforced concrete pavement.The data collected during and after the repair show that the CSA cement concrete had good short-term and long-term performances and,therefore,was suitable for the rapid repair of concrete pavement.