Experimental study on sand solidification with microbial cement

2019 2nd International Conference of Green Buildings and Environmental Management

生态环境科学

Fengling, Ma^1^2 ; Rong, Li^1^2 ; Yao, Xu^1^2 ; Saojiang, Wang^1^2 ; Mingdian, Fang^2

State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, BeiJing

100038, China^1

Key Laboratory of Construction and Safety of Water Project, Ministry of Water Resources, Beijing

100038, China^2

关键词: Complex construction;    Experimental conditions;    Fine powders;    ITS applications;    Molding methods;    Particle diameters;    Strength tests;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/310/4/042049/pdf
DOI  :  10.1088/1755-1315/310/4/042049

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Selecting four types of sand with different ranges of particle diameter, the strength tests of sand solidification with microbial cement are carried out in this paper. With experimental conditions in this paper, most of the strengths of solidified sand with microbial cement are in the range of 1.2∼2.7MPa. Particle gradation is an important factor that affects the solidification of microbial cement. And the perfusion method is more suitable for the sand with appropriate porosity and good connectivity which is easy to be perfused, but not for clay and sludge. The stirring molding method is more suitable for clay and sludge which have much content of fine powder. The strength of solidified sand is related to the direction of perfusion; and the strength of its upper part is higher than that of the lower part. Compared with other solidification materials, the solidified sand with microbial cement has no obvious advantages, due to its low strength, many limitations as well as complex construction technology; dnd its application field needs further study and exploration.