Autogenous healing mechanism of cement-based materials  

作　　者：Desheng LI Hao ZHENG Kang GU Lei LANG Shang SHI Bing CHEN 

机构地区：[1]Department of Civil Engineering,School of Science,Nanjing University of Science and Technology,Nanjing,210094,China [2]School of Transportation Science and Engineering,Harbin Institute of Technology,Harbin,150090,China [3]State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai,200240,China [4]State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Wuhan,430071,China

出　　处：《Frontiers of Structural and Civil Engineering》2023年第6期948-963,共16页结构与土木工程前沿（英文版）

基　　金：This research project was supported by the Fundamental Research Funds for the Central Universities(No.AUGA5710012122).

摘　　要：Autogenous self-healing is the innate and fundamental repair capability of cement-based materials for healing cracks.Many researchers have investigated factors that influence autogenous healing.However,systematic research on the autogenous healing mechanism of cement-based materials is lacking.The healing process mainly involves a chemical process,including further hydration of unhydrated cement and carbonation of calcium oxide and calcium hydroxide.Hence,the autogenous healing process is influenced by the material constituents of the cement composite and the ambient environment.In this study,different factors influencing the healing process of cement-based materials were investigated.Scanning electron microscopy and optical microscopy were used to examine the autogenous healing mechanism,and the maximum healing capacity was assessed.Furthermore,detailed theoretical analysis and quantitative detection of autogenous healing were conducted.This study provides a valuable reference for developing an improved healing technique for cement-based composites.

关 键 词：autogenous healing cement-based materials healing mechanism aggregation effect 

分 类 号：TU5[建筑科学—建筑技术科学]