Study on the improvement of water resistance and water absorption of magnesium oxychloride cement using long-chain organosilane-nonionic surfactants

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.