Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Investigation of Microstructure of Dredging Sand Mixing Cement Specimens to Interpret Reduction of Permeability
Cement is widely utilized to mix with soft clays to improve their properties such as strength, stiffness, and permeability. The characteristics of soils mixing cement (soilcrete) depend on the change of soilcrete microstructure. However, the microstructure of soilcrete has still limit data. This paper investigated the variation of soilcrete microstructure with time using scanning electron microscopy (SEM). The two identical soilcrete specimens were made from dredging sand taken in the Mekong Delta, Vietnam, mixing the OPC cement at a content of 300 kg/m3 for the permeability and SEM tests. The results indicate that the permeability of soilcrete (ks) was lower 1,000 times than that of the unmixed sand. ks decreases with the curing time of 120 days. The soilcrete microstructure was denser than that of the untreated sand sample due to the cement-water-soil chemical reactions forming cementitious products and causing reduction of ks with the curing time.
Investigation of Microstructure of Dredging Sand Mixing Cement Specimens to Interpret Reduction of Permeability
Cement is widely utilized to mix with soft clays to improve their properties such as strength, stiffness, and permeability. The characteristics of soils mixing cement (soilcrete) depend on the change of soilcrete microstructure. However, the microstructure of soilcrete has still limit data. This paper investigated the variation of soilcrete microstructure with time using scanning electron microscopy (SEM). The two identical soilcrete specimens were made from dredging sand taken in the Mekong Delta, Vietnam, mixing the OPC cement at a content of 300 kg/m3 for the permeability and SEM tests. The results indicate that the permeability of soilcrete (ks) was lower 1,000 times than that of the unmixed sand. ks decreases with the curing time of 120 days. The soilcrete microstructure was denser than that of the untreated sand sample due to the cement-water-soil chemical reactions forming cementitious products and causing reduction of ks with the curing time.
Investigation of Microstructure of Dredging Sand Mixing Cement Specimens to Interpret Reduction of Permeability
Luong, Bich T. (Autor:in) / Tran-Nguyen, Hoang-Hung (Autor:in)
Geo-Congress 2022 ; 2022 ; Charlotte, North Carolina
Geo-Congress 2022 ; 157-166
17.03.2022
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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