Experimental investigation on the interactions of PVA and quicklime in the soil for earthen sites

• Autorzy: Zhang Qiyong , Yu Xiaoniu , Chen Wenwu

Identyfikatory

DOI

10.1007/s43452-023-00689-5

• Języki publikacji: EN

Abstrakty

EN

Earthen sites (i.e., ancient earthen buildings) with important historical, cultural, artistic, social, and scientific value have been seriously damaged. Soil treatment with chemical additives can decrease the degradation rate of earthen sites. In the past, polyvinyl alcohol (PVA) and quicklime as chemical additives were studied separately for the protection of earthen sites. In arid and semi-arid northwest China, the early strength of the lime-treated soil may be insufficient due to an inappropriate reaction environment, and the PVA as the additive can quickly increase the soil strength. However, calcium carbonate has been proven to not be decomposed for hundreds of years, while there is still a lack of experimental evidence to show that the PVA cannot be decomposed in decades. The PVA and lime as the additives show the potential to make up for the defects each other. Therefore, the physical and mechanical properties of the PVA and lime composite soil are analysed, and the microscopic properties of the composite soil are discussed in this study. The results show that the addition of the PVA decreases water vapour permeability and pore size, which causes a delay in the carbonization reaction of lime, but it acts as a cementing agent to improve soil strength before the lime appropriately reacts. The addition of quicklime can decrease the hydrophobicity of the PVA-treated soil. The mixing of these two materials is conducive to the colour control of the sample. For the composite soil applied to earthen sites in northwest China, the optimal ratio is 10% lime and 1.0% PVA.

Słowa kluczowe

EN

earthen site; polyvinyl alcohol; quicklime; water vapour permeability

PL

alkohol; wapno palone; para wodna

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2023
• Tom: Vol. 23, no. 3
• Strony: art. no. e153, 2023
• Opis fizyczny: Bibliogr. 54 poz., rys., wykr.

Twórcy

autor

Zhang Qiyong

• College of Engineering and Technology, Southwest University, Chongqing 400715, China

autor

Yu Xiaoniu

• Jiangsu Key Laboratory of Construction Materials, Southeast University, Nanjing 211189, China
• School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore

autor

Chen Wenwu

• College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024)