Water absorption characteristics of cement-based materials based on the chemical reaction

•Capillary permeation was the main force in the early stage of water absorption of cement-based materials.•Absorption mass fraction was increased with the water absorption time and finally reached to a certain content.•Hydrolysis was not merely occurred in the process of water absorption. With the d...

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Bibliographic Details
Published inConstruction & building materials Vol. 220; pp. 607 - 614
Main Authors Wang, Xuebing, Sun, Mingjun, Guo, Shengbo
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 30.09.2019
Subjects
Absorption
Cement hydrolysis
Cement-based materials
Mathematical model
Underground water
Absorption
Mathematical model
Cement-based materials
Underground water
Cement hydrolysis
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Summary:•Capillary permeation was the main force in the early stage of water absorption of cement-based materials.•Absorption mass fraction was increased with the water absorption time and finally reached to a certain content.•Hydrolysis was not merely occurred in the process of water absorption. With the development of urban infrastructure, subway and other underground projects are gradually being constructed in various cities. The influence of water absorption on surface of cement-based materials has therefore become more and more important. A mathematical model and the relative experiment of water absorption in cement mortar were investigated. The results showed that the change of radius of pore was decreased and absorption mass fraction was increased with the increased of absorption time. The possibility and direction of reaction during this process were studied, and the result showed that hydrolysis was not merely occurred in this process.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2019.06.064