磷酸盐水泥界面过渡区研究

发布时间：2018-09-05 07:23

【摘要】：磷酸镁水泥(MPC)是一种新型胶凝材料,常用作快速修补材料,并取得了良好的效果,但关于磷酸镁水泥的界面过渡区的研究目前却十分缺乏。采用XRD、SEM以及EDX等方法对磷酸镁水泥与抛光大理石界面处的物相、微观形貌进行了分析,同时也对界面过渡区的各元素分布进行了测试,对磷酸镁水泥的界面过渡区进行了分析。实验结果表明,磷酸镁水泥在界面处与内部的水化产物晶体生长状况均良好,界面过渡区晶体生长状况与内部差别不大,在加水拌合1h后有大量生长状况良好的水化产物晶体形成,随着龄期的增加,晶体会逐渐增大、增多,晶粒形状也会发生一定变化,结合EDX分析界面过渡区元素变化情况可知,在界面处有大量的Mg及P元素分布,但在距离界面70μm后分布才有一定规律。
[Abstract]:Magnesium phosphate cement (MPC) is a new type of cementing material, which is often used as a fast repair material and has achieved good results. However, the research on the interfacial transition zone of magnesium phosphate cement is very scarce at present. The microstructure and microstructure of the interface between magnesium phosphate cement and polished marble were analyzed by means of XRD,SEM and EDX. At the same time, the distribution of elements in the transition zone of the interface was tested, and the transition zone of the interface of magnesium phosphate cement was analyzed. The experimental results show that the crystal growth condition of hydration product of magnesium phosphate cement at the interface and inside is good, and the crystal growth state in the interfacial transition zone is not different from that in the inner part. After mixing with water for 1 h, a large number of hydration product crystals with good growth condition were formed. With the increase of age, the crystal would gradually increase and increase, and the grain shape would also change to a certain extent. According to the analysis of the elements in the transition zone of the interface by EDX, it can be seen that the change of the elements in the transition zone of the interface is obvious. A large number of Mg and P elements are distributed at the interface, but only after 70 渭 m from the interface.
【作者单位】：西南科技大学四川省非金属复合与功能材料重点实验室;表面物理与化学重点实验室;
【基金】：国家重点基础研究发展计划子课题(2012CB722707) 西南科技大学博士基金(12ZX7130)
【分类号】：TU528

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