Experimental study on freeze-thaw resistance of modified magnesium oxychloride cement foam concrete

Autor:	Yu Gao, Shuguang Wang, Luming Wang, Dongqing Zhong, Koubao Feng
Rok vydání:	2021
Předmět:	Cement History Materials science Magnesium Composite number chemistry.chemical_element Foaming agent engineering.material Microstructure Foam concrete Computer Science Applications Education Compressive strength chemistry engineering Freeze thaw resistance Composite material
Zdroj:	Journal of Physics: Conference Series. 1885:032009
ISSN:	1742-6596 1742-6588
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::925b3db9438872ff20b46b09aee17310 https://doi.org/10.1088/1742-6596/1885/3/032009 Zobrazit plný text záznamu