废弃疏浚沙土固化利用研究

doi:10.3969/j.issn.1674-0696.2020.12.18

摘要/Abstract

摘要： 综述了废弃疏浚沙土资源化利用的现状，总结了国内外化学固化法、高温烧结法及物理脱水法等3种疏浚沙土固化处理法的应用情况。研究发现：疏浚沙土资源化利用最主要的方向是制备砖、陶粒，以及工程回填料和混凝土细骨料。指出存在问题：疏浚沙土砖强度发展缓慢、易开裂；疏浚沙土陶粒混凝土拌和过程中易出现浮浆、泌水；疏浚沙土回填材料在实际工程中的用量有待研究；疏浚沙土混凝土细骨料脱水处理问题有待解决。提出建议：疏浚沙土可作为主要原材料制备重量轻、抗裂性能好且收缩率低的水泥基材料，以替代传统的混凝土应用于航道整治工程、堤岸护坡工程。

关键词: 航道工程, 疏浚沙土, 固化处理法, 资源化利用

Abstract: The present situation of resource utilization of waste dredged sand and soil was summarized, and three kinds of solidification method of dredged sand and soil at home and abroad, that is chemical solidification method, high temperature sintering method and physical dewatering method were summarized. The research shows that the main direction of resource utilization of dredged sand and soil is to prepare brick and ceramsite, engineering backfill and concrete fine aggregate. The existing problems are that the strength of brick develops slowly and is easy to crack, and laitance and bleeding are easy to appear in the mixing process of ceramsite concrete; as a kind of backfill material, its dosage in the actual project needs to be studied; as the concrete fine aggregate, the dehydration problem needs to be solved. It is suggested that the dredged sand and soil can be used as the main raw material to prepare cement-based materials with light weight, good crack resistance and low shrinkage, so as to replace the traditional concrete in waterway regulation engineering and embankment slope protection engineering.

Key words: waterway engineering, dredge sand and soil, solidification method, resource utilization

中图分类号:

江朝华1,3，李智成1,3，方佳敏2，李函1,3. 废弃疏浚沙土固化利用研究[J]. 重庆交通大学学报（自然科学版）, 2020, 39(12): 111-116.

JIANG Chaohua1,3，LI Zhicheng1,3，FANG Jiamin2，LI Han1,3. Solidification Utilization of Waste Dredge Sand and Soil[J]. Journal of Chongqing Jiaotong University(Natural Science), 2020, 39(12): 111-116.

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