同济大学学报（自然科学版）2011，Vol.39Issue(10)：1517-1523,7.DOI:10.3969/j.issn.0253-374x.2011.10.019
工程水泥基复合材料自愈合过程与产物
Self-healing Processes and Products of Engineered Cementitious Composites Materials
摘要
Abstract
The growth processes of self-healing products on 15 μm,30 /μm,and 50 μm cracks as well as on fiber surfaces were displayed by means of ESEM. The chemical characterizations of healing products were reported by applying many advanced research technologies such as EDS, TEM, XRD and FTIR. These results suggest that further hydration of cementitious materials and the formation of C-S-Hgel and CaCO3 crystals are the main reasons for the self-healing phenomena. C-S-H is the main self-healing product for crack widths of 15 fim,and C-S-H and CaCO3 are the main self-healing products for crack widths of 30 μm. Self-healing products couldn' t fill in the crack widths of 50 μm within observation period. At the micro-level, cracks below 30 μm in width can be almost totally healed. Meanwhile, PVA fibers with hydrophilic nature in ECC provide nucleation sites for healing products that may aid in the self-healing of ECC.关键词
工程水泥基复合材料/自愈合/过程/产物Key words
engineered cementitious composites(ECC)/ self-healing/ process/ product分类
建筑与水利引用本文复制引用
阚黎黎,施惠生,瞿广飞,宁平..工程水泥基复合材料自愈合过程与产物[J].同济大学学报（自然科学版）,2011,39(10):1517-1523,7.基金项目
美国国家自然科学基金(CMMI 0700219) （CMMI 0700219）
