Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 306, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2021.124872
Keywords
Magnesium Oxychloride Cement (MOC); Hydrophobic; Compressive strength; Mass water absorption; Softening coefficient
Categories
Funding
- National Natural Science Foundation of China [21571024]
- Major Special Science and Technology Projects in Qinghai Province [2018-NN-152]
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By adding HDTMS and P123, a hydrophobic MOC material with high compressive strength and low water absorption rate can be prepared.
In this study, hexadecyltrimethoxysilane (HDTMS) and polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (P123) were added to magnesium oxychloride cement (MOC). Using the amphiphilicity of P123 to weaken the effect of HDTMS on the hydration reaction of MOC, the entire hydrophobic MOC material was prepared. Compared with the blank sample, the compressive strength can reach its 63% after 28 days. The softening coefficient can reach 0.90 and the mass water absorption is only 7.3% after 28 days of immersing.
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