Application of Biological Glue–Clay Composite Substrate in Slope Ecological Restoration
Author:
Zhu Xufen1, Zheng Jiaqiang1, Gao Yuliang2, Xue Jian2, Hu Guochang3, Che Wenyue1, Song Zezhuo14ORCID, Liu Jin1ORCID, Huang Tingwei1, Wu Peng1
Affiliation:
1. School of Earth Sciences and Engineering, Hohai University, Nanjing 210098, China 2. Jiangsu Institute of Geology and Minerals Investigation, Jiangsu Geological Bureau, Nanjing 210000, China 3. Jiangsu Shanshui Ecological Environment Construction Engineering Co., Ltd., Nanjing 210018, China 4. School of Engineering, Royal Melbourne Institute of Technology, Melbourne, VIC 3001, Australia
Abstract
Given the issues of soil cracking, poor water retention during drought, and erosion damage caused by rainfall, we conducted an in-depth study on the water retention properties, cracking resistance, and scouring resistance of biogel-amended clay using evaporation cracking and scouring tests. The hydrophysical properties and cohesive aggregation mechanism of biogel-amended clay were explored, and the results showed that the incorporation of biogel improved the water retention, cracking resistance, and scour resistance of the clay samples. With an increase in the biogel content, the biogel mucous membrane inside the samples improved the cohesion between soil particles, reduced the generation and development of cracks, and improved the cracking resistance. There was no significant cracking of the samples after the biogel content reached 0.3%, which changed the migration of water in the sample, prevented water evaporation, and improved the water retention of the clay samples. Biofilm can change the migration of water in the sample, prevent some evaporation, and reduce the evaporation rate. To a certain extent, it can enhance the water retention capacity of the sample. Enhanced biofilm content significantly reduced scouring in the process of rainfall and runoff erosion of the sample, and biofilm content of 0.2% significantly reduced the surface of the specimen damaged by erosion. The hydrophysical properties of the composite-adhesive-amended clay samples were significantly improved compared with those of the single-bioadhesive-amended clay samples.
Funder
Scientific Research Project of Geological and Mineral. Exploration Bureau of Jiangsu Province National Natural Science Foundation of China Jiangsu Funding Program for Excellent Postdoctoral Talent
Subject
Polymers and Plastics,General Chemistry
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