摘要
采用2%盐酸溶液、硅烷溶液改性再生细骨料,研究了改性前后再生细骨料的物理性能和胶砂力学性能。研究结果表明,采用两种改性方法均降低了再生细骨料的吸水率、压碎指标,用其成型的水泥胶砂力学性能也均得到明显改善,其28 d的抗折强度趋近于天然细骨料水泥胶砂,硅烷浸泡再生细骨料水泥胶砂为天然细骨料水泥胶砂强度的109%,2%盐酸浸泡再生细骨料水泥胶砂抗压强度为天然细骨料胶砂强度的96%。对比2%盐酸溶液,硅烷浸泡改性再生细骨料效果更为显著。
The recycled fine aggregates were modified with 2% hydrochloric acid solution and silane solution. The physical properties of the recycled fine aggregate before and after the modification and the mechanical properties of the cement mortar were studied. The results of the study show that using two kinds of modification methods can reduce the water absorption and the fragm entation index of the recycled fine aggregate, and the mechanical properties of the modified cement mortar after modified fine aggregate can also be significantly improved. The flexural strength is close to that of natural fine aggregate cement mortar. The compressive strength of recycled fine aggregate cement mortar soaked in silane is 109% of that of natural fine aggregate mortar, compressive strength of reclaimed fine aggregate soaked in 2% hydrochloric acid is 96% of the strength of natural fine aggregate cement mortar. Compared with the 2% hydrochloric acid solution, the silane soaking significantly enhances the effect of regenerating the fine aggregate.
出处
《混凝土与水泥制品》
北大核心
2018年第10期24-27,共4页
China Concrete and Cement Products
基金
国家级大学生创新创业训练计划项目(201710676010)
关键词
再生细骨料
表面改性
物理性能
力学性能
水泥胶砂
Recycled fine aggregates
Surface modification
Physical properties of fine aggregate
Mechanical properties of cement mortar
Cement mortar
