摘要
为解决塑料憎水表面所导致的塑料砂浆抗压强度较低的问题,本文利用废弃聚丙烯(PP)塑料的热塑性,通过热焊接工艺将硅灰焊接于PP表面,制备硅灰@塑料颗粒复合颗粒(SF@PP),并对复合颗粒的亲水性和火山灰活性进行测试.结果表明,硅灰热焊接改性显著改善了 PP的亲水性并提高了其火山灰活性,促进了水化产物的界面沉积,界面密实度提升.相应地,塑料砂浆的孔隙率明显降低,抗压强度显著提升,提升幅度为26.07％～31.04％.研究结果有利于高效利用废弃塑料,并为高性能塑料砂浆的制备提供依据.
Abstract
In order to address the issue of reduced compressive strength in plastic mortar caused by the hydrophobic nature of plastic,this study utilizes the thermoplasticity of discarded polypropylene(PP)plastic to prepare silica fume@plastic particle composite particles(SF@PP)by welding silica fume on the surface of PP through the thermal welding process and tests the hydrophilicity and volcanic ash activity of the composite particles.The results indicate that the modified plastic through silica fume heat welding improves the hydrophilicity of PP and enhances its volcanic ash activity,promoting the deposition of hydration products at the interface and increasing the compactness of the interface.Consequently,the porosity of the plastic mortar is significantly reduced,and the compressive strength is significantly increased by 26.07％to 31.04％.The results of the study are conducive to the efficient utilization of waste plastics and provide a basis for the preparation of high-performance plastic mortar.
基金项目
国家自然科学基金(52008003)
安徽理工大学高层次引进人才科研启动资金项目(2022yjrc27)
安徽省高等学校自然科学研究项目(2023AH051171)
安徽省住房城乡建设科学技术计划(2022-YF071)
国家科技期刊平台
NSTL
万方数据