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Study on the Improvement of Waterproof Performance of Historical Silt Sites with Silicone Waterproofing Agent

Li, Xingang ; Ma, Qingwen ; Ji, Yufu ; Cheng, Kaidi ; Sun, Zhuoliang

Coatings (Basel), 2022-08, Vol.12 (8), p.1162 [Periódico revisado por pares]

Basel: MDPI AG

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Título:
Study on the Improvement of Waterproof Performance of Historical Silt Sites with Silicone Waterproofing Agent
Autor: Li, Xingang ; Ma, Qingwen ; Ji, Yufu ; Cheng, Kaidi ; Sun, Zhuoliang
Assuntos: Analysis ; Chemical properties ; China ; Concrete ; Construction ; Contact angle ; Environmental aspects ; Excavations (Archaeology) ; Experiments ; Flooding ; Historic sites ; Laboratories ; Permeability ; Physical properties ; Pore size ; Protection and preservation ; Scanning electron microscopy ; Silicones ; Silt ; Sodium ; Soil compaction ; Soil improvement ; Soils ; Water absorption ; Water damage ; Water levels ; Waterproofing ; Wetting
É parte de: Coatings (Basel), 2022-08, Vol.12 (8), p.1162
Descrição: Silt has the characteristics of obvious capillary water effect and strong water sensitivity. The flooding of the Yellow River caused the water level in Kaifeng to be high, and the damage of capillary water to the silt site of Kaifeng Zhouqiao site is increasing day by day. In order to improve the waterproof performance of the site soil, three kinds of silicone waterproof materials were selected, and the site soil was improved by internal mixing. The improvement effects of different materials were compared through the capillary water rise test, and the contact angle of the modified soil with the optimal ratio was measured. Microscopic tests were conducted to evaluate its wetting properties and reveal the mechanism of action of the modified materials. The results show that the three kinds of silicone waterproofing agents can improve the waterproofing effect of soil, among which 0.5% sodium methylsilicate modified soil has the most significant waterproofing effect; its capillary water absorption inhibition effect can reach 98.34%, and the contact angle is 137.06. The surface of the modified soil is hydrophobic after the addition of sodium methylsilicate. An evenly distributed waterproof film is thus formed on the surface of the soil particles, which changes the contact mode between the soil particles and strengthens the connection between the soil particles, so that the proportion of large pores decreased. The proportion of mesopores and small pores increased, which made the soil sample more compact. These results explain the improvement of the waterproof performance of the soil sample.
Editor: Basel: MDPI AG
Idioma: Inglês

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Study on the Improvement of Waterproof Performance of Historical Silt Sites with Silicone Waterproofing Agent

Li, Xingang ; Ma, Qingwen ; Ji, Yufu ; Cheng, Kaidi ; Sun, Zhuoliang

Basel: MDPI AG

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