固化吹填泥砂混合物的力学性能与微观结构分析  

Analysis of Mechanical Properties and Microstructure of Solidified Hydraulic Fill Silt and Sand

作　　者：李悦[1] 李学辉 李战国[1] 

机构地区：[1]北京工业大学城市与工程安全减灾省部共建教育部重点实验室,北京100124 [2]保利(北京)房地产开发有限公司,北京100120

出　　处：《北京工业大学学报》2013年第6期881-885,共5页Journal of Beijing University of Technology

基　　金：国家自然科学基金资助项目(51008007);北京市属高等学校人才强教计划资助项目(00400054RA002)

摘　　要：中国沿海地区吹填造地过程中产生大量低成本的淤泥和吹填砂.同时,此类地区建设公路中却需要大量高成本水泥稳定碎石等建筑材料.针对此类问题,本文采用不同类型的固化剂固化淤泥和吹填砂混合物替代传统公路修筑材料,研究了固化后泥砂混合物的无侧限抗压强度及其微观结构.结果表明:相对于水泥固化剂,本项目研发的固化剂可大幅度提高固化泥砂混合物的强度;其机理是新型固化剂可形成更多的胶凝和膨胀性产物,其中有机化合物可通过聚合反应形成有机分子链,包裹泥砂混合物颗粒,密实土体结构.A large amount of cheap hydraulic fill silt and sand in coastal land reclamation project will be generated, meanwhile, the road construction project in this region needed a large number of expensive building materials such as cement stabilized crushed stone. In view of these problems, different stabilized mixtures of hydraulic fill silt and sand were used to replace the traditional construction materials; and the unconfined compressive strength and microstructure of stabilized soil were studied. Results show that compared to the cement stabilizer, stabilizer developed in this project can significantly increase the strength of stabilized silt and sand mixture. The solidification mechanism is that the new stabilizers can produce more gel and expansive hydrated products, and the organic compounds in stabilizers can form organic molecules by polymerization process, which can wrap the particles of silt and sand resulting in the soil structure being compacted.

关 键 词：吹填泥砂 固化剂 微观结构 固化机理 

分 类 号：TU528.042[建筑科学—建筑技术科学]