摘要Different samples of eolian sand were treated to study the sand-fixing effect of microbial-induced mineralization after mixing fly ash with eolian sand. The effects of blending fly ash on microbial-induced mineralization and sand fixation were investigated by measuring permeability, water retention, surface strength, and wind erosion resistance. After three times of microbial-induced mineralization treatment with 30% fly ash, the permeability coefficient decreased by 79.4%, the cumulative evaporation decreased by 26.5%, the surface strength increased by 19.9%, and the wind erosion rate decreased by 21.2%. The yield of calcium carbonate was negatively correlated with wind erosion rate and positively correlated with surface strength. In conclusion, mixing fly ash is more practical than simply using microbial-induced mineralization to fix sand, which can considerably reduce the permeability and improve the water retention, surface strength, and wind erosion resistance of the solidified layer of aeolian sand.
Abstract：Different samples of eolian sand were treated to study the sand-fixing effect of microbial-induced mineralization after mixing fly ash with eolian sand. The effects of blending fly ash on microbial-induced mineralization and sand fixation were investigated by measuring permeability, water retention, surface strength, and wind erosion resistance. After three times of microbial-induced mineralization treatment with 30% fly ash, the permeability coefficient decreased by 79.4%, the cumulative evaporation decreased by 26.5%, the surface strength increased by 19.9%, and the wind erosion rate decreased by 21.2%. The yield of calcium carbonate was negatively correlated with wind erosion rate and positively correlated with surface strength. In conclusion, mixing fly ash is more practical than simply using microbial-induced mineralization to fix sand, which can considerably reduce the permeability and improve the water retention, surface strength, and wind erosion resistance of the solidified layer of aeolian sand.
张表志. Effects of Fly Ash on Sand Fixation with Microbial-induced Carbonate[J]. Journal of Highway and Transportation Research and Development, 2020, 14(2): 51-56.
ZHANG Biao-zhi. Effects of Fly Ash on Sand Fixation with Microbial-induced Carbonate. Journal of Highway and Transportation Research and Development, 2020, 14(2): 51-56.
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2020, Vol. 14 
