EFFECT OF BENTONITE CONTENT ON THE PHYSICAL, MECHANICAL, AND WATERPROOFING PROPERTIES OF SAND–BENTONITE MIXTURES.
DOI:
https://doi.org/10.5281/zenodo.22091135Abstract
The article evaluates the effect of the bentonite content in sand–bentonite waterproofing mixtures on their physical-
mechanical and waterproofing properties based on laboratory studies. During the experiments, mixtures of different
compositions were prepared based on sodium bentonite clay and construction sand, and their chemical composition,
granulometric characteristics, maximum dry density, optimum moisture content, plasticity characteristics, free swelling
degree, and swelling pressure were determined. The results showed that an increase in the bentonite content in the mixture
significantly increased plasticity, water-retention capacity, free swelling degree, and swelling pressure. At the same
time, it was substantiated that an increase in the bentonite content improved the waterproofing properties of the mixture,
resulting in a decrease in the coefficient of filtration. The research results are of practical importance for the design of
sand–bentonite waterproofing barriers and the selection of an optimal composition for protecting underground structures
from moisture.
Keywords
bentonite clay, construction sand, sand–bentonite mixture, waterproofing, hydraulic conductivity, filtration, swelling degree, swelling pressure, plasticity, underground structuresReferences
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