橡胶颗粒水泥稳定砂砾基层施工工艺研究被引量：3

Study on Construction Technology of Rubber Particle Cement Stabilized Sand-gravel Base

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摘要为验证橡胶颗粒水泥稳定砂砾基层的工程适用性,基于室内试验,确定橡胶颗粒水泥稳定砂砾基层材料施工配比。针对橡胶颗粒水泥稳定砂砾基层材料特点,明确橡胶颗粒水泥稳定砂砾基层施工工艺。在此基础上,铺筑橡胶颗粒水泥稳定砂砾基层试验段,评价橡胶颗粒水泥稳定砂砾基层施工质量,分析橡胶颗粒水泥稳定砂砾基层防拱胀开裂机理。结果表明,橡胶颗粒水泥稳定砂砾相较普通水泥稳定砂砾其最佳含水率增长0.4%、最大干密度降低0.011 g/cm^(3);预拌工艺保证了橡胶颗粒分布均匀性,交互式碾压工艺确保了橡胶颗粒水泥稳定基层施工压实效率;试验段压实度达到98.04%,7 d无侧限抗压强度为3.6 MPa,均符合规范要求。橡胶颗粒掺加后水泥稳定砂砾应变差值较掺加前降低19%,有效提高了水泥稳定砂砾基层防拱胀抗开裂性能。 In order to verify the engineering applicability of rubber particle cement stabilized sand-gravel base,based on indoor tests,the construction ratio of rubber particle cement stabilized sand-gravel base materials was determined.According to the characteristics of rubber particle cement stabilized sand-gravel base material,the construction technology was defined.On this basis,the rubber particle cement stabilized sand-gravel base test section was paved to evaluate the construction quality and analyze the anti arch expansion and cracking mechanism of rubber particle cement stabilized sand-gravel base.The results show that the optimal moisture content of rubber particle cement stabilized sand-gravel base increases by 0.4%and the maximum dry density decreases by 0.011 g/cm^(3) compared with that of ordinary cement stabilized sand-gravel base.The ready-mixing process ensures the uniform distribution of rubber particle,the interactive rolling process ensures the compaction efficiency.The compactness of the test section reaches 98.04%,and the 7 d unconfined compressive strength is 3.6 MPa,which meets the requirements of the specification.Adding rubber particles results in the decrease of the strain difference of cement stabilized sand-gravel base with a reduction of 19 percent,which effectively improves the anti-arching expansion and anti-cracking performance of cement stabilized sand-gravel base.

作者伍川姜维强刘思拓王朝辉王国成马镇东周晓蕾 WU Chuan;JIANG Weiqiang;LIU Situo;WANG Chaohui;WANG Guocheng;MA Zhendong;ZHOU Xiaolei(China Railway City Development and Investment Group Co.,Ltd.,Chengdu 610000,China;China Railway Beijing Engineering Bureau Group First Engineering Co.,Ltd.,Xi′an 710199,China;School of Highway,Chang′an University,Xi′an 710064,China)

机构地区中铁城市发展投资集团有限公司中铁北京工程局集团第一工程有限公司长安大学公路学院

出处《交通科技》 2022年第4期34-38,共5页 Transportation Science & Technology

关键词道路工程橡胶颗粒水泥稳定砂砾基层施工工艺拱胀开裂 road engineering rubber particle cement stabilized sand-gravel base construction technology arching expansion and cracking

分类号 U416.1 [交通运输工程—道路与铁道工程]