Microstructure and mechanism analysis of cement-based capillary crystalline waterproofing material
ZHANG Yiteng
YANG Jinchao
ZHAO Weixia
SHEN Chunmiao
CAI Xinan
ZUO Lian
Abstract：Influence of cement-based capillary crystalline waterproofing(CCCW) material on impermeability of concrete was in-vestigated in this work. The microstructure in different depth and phase composition of hardened cement paste coated with CCCW was analyzed using SEM,EDS and XRD,to explore the mechanism how CCCW coating can make effect on impermeability of con-crete. The results show that the 28 d impermeability pressure of the concrete coated with CCCW could be improved to 250 percent of basic concrete. SEM observation and EDS analysis indicates that active components from CCCW coating infiltrated into cement paste and reacted with cement compounds to form needlelike columnar ettringite crystal and lamellar single sulfur aluminate hy-drate crystal. The products filled and blocked pores and cracks to make concrete denser and more impermeable. Moreover,the re-sults of XRD display that active components reacted with cement compounds to form insoluble calcium carbonate crystal and hy-drated calcium silicate crystal.
Keywords：cement-based capillary crystalline waterproofing materialimpermeabilitymicrostructuremechanism analysiscrystal
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 68-70 )