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再生微粉制备地聚合物稳定碎石基层性能研究
作者：刘聪，卢祎苗，吴正光，王彤，孙海峰
（扬州大学 建筑科学与工程学院，江苏 扬州 225127）
摘要：以废弃建筑垃圾破碎再生过程中产生的再生微粉为原料制备地聚合物，得出再生微粉为原料的地聚合物配合比，对再生微粉地聚合物所制备稳定碎石基层材料适用性进行研究。结果表明：再生微粉地聚合物最佳配比为m（再生微粉）∶m（矿渣粉）=50∶50，6%NaOH、6%Na2SiO3复合激发，水固比为0.4。采用碱激发再生微粉制备地聚合物替代水泥，推荐使用30%再生骨料替代天然骨料，与水泥稳定材料相比能够有效降低基层材料的失水敏感性，提高材料的收缩性能。再生微粉地聚合物稳定碎石完全可以应用于施工，在公路改扩建工程中循环应用具有较好前景。
关键词：再生微粉；地聚合物；稳定再生碎石；收缩性能；水稳定性
中图分类号：TU472 文献标识码：A 文章编号：1001-702X（2020）07-0041-05
Experimental study on properties of geopolymer stabilized macadam base materials prepared by recycled micropowder
LIU Cong，LU Yimiao，WU Zhengguang，WANG Tong，SUN Haifeng
（College of Civil Science and Engineering，Yangzhou University，Yangzhou 225127，China）
Abstract：The recycled micropowder produced during the process of crushing and recycling waste construction is used as raw material to prepare the polymer，and the optimum ratio of the polymer of the recycled micropowder is obtained，then the applicability of the polymer stabilized macadam base material with recycled micropowder is studied. The results show that the optimum ratio of polymer with recycled micropowder is m（recycled micropowder）∶m（slag powder）=50∶50，NaOH dosage is 6%，Na2SiO3 dosage is 6%，water-solid ratio is 0.4. Replacing cement with recycled micropowder polymer，it is recommended to use 30% recycled aggregate instead of natural aggregate. Compared with cement stabilized material，it can effectively reduce the water loss sensitivity of the base material and improve the shrinkage performance of the material. The polymer stabilized macadam with recycled micropowder can be applied to construction. This material has good prospects for cyclic application in highway reconstruction and expansion projects.
Key words：recycled micropowder，geopolymer，stabilized reclaimed macadam，shrinkage property，water stability