PFCY沙土固结材料的结构与性能

The property and structure of PFCY sandy soil consolidation material

以水溶性聚合物、农作物秸秆、工业固体废弃物和水泥为主要原料制备PFCY沙土固结材料,研究了PFCY的微观结构特征和力学性能,以及各组分之间的作用机理,并分析了PFCY强度体系的形成过程。研究结果表明,在水灰比为0.4,聚丙烯酰胺掺量为1%,麦秸纤维掺量为2%时,PFCY的抗折强度提高了24.7%,聚丙烯酰胺、麦秸纤维和无机胶凝材料能够均匀分布在PFCY体系中,聚丙烯酰胺以丝状和网络状形态存在,材料内部颗粒之间的粘结得到增强,麦秸纤维与硬化水泥浆体界面结构有所改善。

PFCY sandy soil consolidation material was prepared by water-soluble polymer,crop straw,industrial solid waste and cement,and the microstructure characteristics,mechanical properties and mechanism between components of PFCY were studied.Moreover,the formation process of strength system was analyzed.The results show that,the flexural strength of PFCY was increased by 24.7%,when water-cement ratio is 0.4,the mixing amount of polyacrylamide is 1%,the mixing amount of straw fiber is 2%.The polyacrylamide,straw fiber and inorganic gelling material can disperse evenly in PFCY and polyacrylamide exists in the form of filamentous and network.Meanwhile,the bond between particles in PFCY can be enhanced,and the interface between straw fiber and hardened cement pastes can be improved.