Open AccessExperimental study on freeze-thaw resistance of modified magnesium oxychloride cement foam concrete
Author(s) -
Dongqing Zhong,
Shuguang Wang,
Guangzheng Yu,
Luming Wang,
Koubao Feng
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1885/3/032009
Subject(s) - materials science , magnesium , cement , spall , microstructure , composite material , frost (temperature) , composite number , compressive strength , foaming agent , metallurgy , porosity
Magnesium oxychloride cement foam concrete specimenswere prepared by applying the inorganic-organic composite modification method to improve the water resistance of magnesium oxychloride cement and using the composite protein foaming agent for the purpose of foaming. Then, freeze-thaw cycle test was performed to examinethe frost resistance property of the specimens under the designed mix proportion. The experimental results show that: after 20 freeze-thaw cycles, neither macro-cracks nor hollow spalling are observed on the surface of the specimen, the strength loss rate is only 12%, and the compressive strength remains at a relatively high level of 1.46 MPa. Meanwhile, the microstructure of the specimen before and after the freeze-thaw experiment was analyzed through SEM test, and the failure mechanism during the freeze-thaw process was explained.