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Strength of Coarse-Grained Soil Stabilized by Poly (Vinyl Alcohol) Solution and Silica Fume under Wet-Dry Cycles.
Zhao, Zhewei; Li, Wenwei; Shi, Haiping; Li, Zhongyao; Li, Jiahuan; Zhao, Cheng; Wang, Peiqing.
Afiliação
  • Zhao Z; Water Conservancy Civil Engineering College, Tibet Agriculture and Animal Husbandry University, Linzhi 860000, China.
  • Li W; Tibet Construction Water Conservancy and Electric Power Engineering Technology Research Center, Linzhi 860000, China.
  • Shi H; Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China.
  • Li Z; Water Conservancy Civil Engineering College, Tibet Agriculture and Animal Husbandry University, Linzhi 860000, China.
  • Li J; Tibet Construction Water Conservancy and Electric Power Engineering Technology Research Center, Linzhi 860000, China.
  • Zhao C; Water Conservancy Civil Engineering College, Tibet Agriculture and Animal Husbandry University, Linzhi 860000, China.
  • Wang P; Tibet Construction Water Conservancy and Electric Power Engineering Technology Research Center, Linzhi 860000, China.
Polymers (Basel) ; 14(17)2022 Aug 29.
Article em En | MEDLINE | ID: mdl-36080628
To investigate an environmentally benign stabilizer for coarse-grained soil in southeast Tibet, poly (vinyl alcohol) (PVA) and silica fume were used to improve the geotechnical properties of coarse-grained soil. Unconfined compressive strength (UCS) and wet-dry cycle tests were conducted on prepared samples to evaluate the effect of the additive content and curing age on the strength and durability of coarse-grained soil. The results reveal that the UCS of the samples increased with the additive content of PVA solution and the curing age. The optimal value for the additive content of PVA solution and the curing age is 12% and 7 days, respectively. With the optimal PVA solution content, the PVA solution combined with silica fume stabilizer exhibited better reinforcement compared with pristine PVA. The UCS of the samples stabilized by PVA solution and silica fume increased depending on the curing age, and plateaued after 14 days. Samples with 12% PVA solution and 6% silica fume achieved a satisfactory UCS of 1543.17 kPa after curing for 28 days. As the number of wet-dry cycles increased, the UCS of the samples stabilized by the PVA solution and silica fume exhibited an upward trend during the first three wet-dry cycles, owing to the filling of pores by the gel produced by the silica fume, but began to decline as the number of wet-dry cycles increased. All samples retained a high UCS value after 10 wet-dry cycles compared with the samples that were not subjected to wet-dry cycles.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Polymers (Basel) Ano de publicação: 2022 Tipo de documento: Article País de afiliação: China

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Polymers (Basel) Ano de publicação: 2022 Tipo de documento: Article País de afiliação: China