氯氧镁水泥混凝土路面力学性能研究

Study on Mechanical Property of Pavement Built with Magnesium Oxychloride Cement Concrete

氯氧镁水泥混凝土是用氯氧镁水泥作为胶凝材料,砂、石作集料,再加入一定比例改性剂,经搅拌而得的混凝土。利用镁水泥混凝土修筑示范路面,通过回弹仪、X-Ray衍射仪(XRD)、扫描电子显微镜(SEM)检测路面的抗压强度、相组成和微观结构进行其力学性能研究。结果表明,修筑示范路面早期抗压强度增加很快,3 d就能通车,后期基本保持稳定。修筑路面的主要相组成为5·1·8相,不随路面使用时间的延长而变化,且其具有针状结构。

Magnesium Oxychloride Cement （MOC） concrete roadway has been obtained by the chemical reaction of magnesia, magnesium chloride and water incorporated with stone. The compressive strength, microstrueture and phase composition of MOC pavement were examined by rebound apparatus, X - ray diffraction （XRD） and scanning electron microscope （SEM）. The results show that MOC roadway has high compressive strength which meets the requirement of traffic in 3 days, and stays stable over time. The major hydration product is 5·1·8 phase with a needlelike shape in the MOC roadway.