Open AccessImpact of Drying and Wetting Cycles on Vegetation Cement-soil Physical and Mechanical Properties
Author(s) -
Xudong Hu,
Jiazhen Gao,
Mingtao Zhang,
Songtao Peng,
Wei Xu,
Chenyuan Wang
Publication year - 2021
Publication title -
nature, environment and pollution technology/nature, environment and pollution technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.154
H-Index - 11
eISSN - 2395-3454
pISSN - 0972-6268
DOI - 10.46488/nept.2021.v20i04.021
Subject(s) - wetting , cohesion (chemistry) , shrinkage , water content , cement , geotechnical engineering , moisture , vegetation (pathology) , materials science , substrate (aquarium) , environmental science , stage (stratigraphy) , soil science , composite material , geology , chemistry , medicine , oceanography , organic chemistry , pathology , paleontology
The physical and mechanical properties of the ecological slope protection substrate will be affected by long-term variation of the meteorological condition, resulting in the stability of the substrate being reduced. So an artificial substrate of vegetation cement-soil was selected as the research object to prepare specimens with the different initial moisture content of 13%, 19%, 25%, 31%, 37%, and 43%. And a series of tests are conducted to investigate the evolution of the physical and mechanical properties under drying-wetting cycling conditions. Typical results of the vegetation cement-soil evolution can be divided into three stages: cement hydration stage, shrinkage stage, and stabilization stage. In terms of different initial moisture content, the shrinkage cracks number, cracks length, crack width, and cracks surface area are increased first and then stabilize with the increase of the number of drying-wetting cycles. In contrast, the cohesion and internal friction angle of the vegetation cement-soil is reduced with the increase of the number of cycles. Comprehensive analysis shows that the initial moisture content of vegetation cement soil ranges from 25% to 31% is the optimal choice to ensure substrate stability in production practice.