摘要(Abstract)：
以丁苯乳液(SBR)和废弃橡胶粉作为改性组分,研究它们对水泥基材料流变性、力学性能和微观结构的影响。结果表明:SBR能明显增大水泥净浆的流动度并使其表观黏度减小,改善硬化浆体的微观结构,提高硬化浆体的抗折强度和韧性;橡胶粉对硬化水泥浆体的抗压强度有不利影响,但能填充水泥石中的孔隙,提高其韧性;SBR-橡胶粉复合改性时,SBR在水泥颗粒表面成膜,限制熟料矿物的水化,使水化加速期的持续时间延长,水化产物生成量减少,但聚合物膜与水化产物及橡胶粉颗粒形成相互交织的空间网络结构,使浆体更加密实,显著提高水泥浆体的力学性能。
关键词(KeyWords)： 丁苯乳液;橡胶粉;聚合物改性水泥基材料;水化;微观结构
基金项目(Foundation): 国家自然科学基金项目(51778269);; 济南大学科研基金项目(XKY1602)
作者(Author): 毕梦迪,赵德强,白贤圣,杨海波,孙海龙,张秀芝
DOI: 10.13349/j.cnki.jdxbn.2020.03.003
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