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- W4380930057 abstract "Calcareous sands are important building materials in ocean engineering. In order to ensure the stability of the island under the actions of wave and current, the marine calcareous sand was reinforced by two eco-friendly methods (Microbial and Enzyme induced carbonate precipitation, MICP and EICP). The concentrations of calcium and bacteria, shear wave velocity, global hydraulic conductivity, penetration resistance and microscopic characteristics of each test were evaluated systematically. The normalised shear wave velocity in EICP treated samples were smaller than those of MICP treated sand, but the response of EICP was faster at the same duration. The global hydraulic conductivity exhibited different degrees (46% of MICP and 28% of EICP) of exponential reductions with the increase of the time in dry environment. It exhibited less degrees (33% of MICP and 18% of EICP) of liner reductions in underwater environment. The cementation products of MICP in calcareous sand were mainly spherical calcium carbonate in both dry and underwater environments, and rhombohedral calcium carbonate also appeared in dry environment, leading to higher penetration resistance in P1-M than P2-M. For EICP-treated calcareous sands, calcium carbonate crystals in dry environment were mainly rhombic, and loose eggshell-like morphologies were formed in underwater environment. MICP was more suitable than EICP for the reinforcement of marine calcareous sands in underwater environments." @default.
- W4380930057 created "2023-06-17" @default.
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- W4380930057 date "2023-09-01" @default.
- W4380930057 modified "2023-10-18" @default.
- W4380930057 title "Experimental study on the reaction process and engineering characteristics of marine calcareous sand reinforced by eco-friendly methods" @default.
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- W4380930057 doi "https://doi.org/10.1016/j.apor.2023.103641" @default.
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