Experimental Study on Optimization of Consolidation Parameters of Silty Clay Based on Response Surface Methodology: A Case Study on the Protection and Restoration of the Ming and Qing Dynasty Hangzhou Seawall Site

Liang Ye, Zhenyan Chen, Liquan Wu and Baoping Zou ()
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Liang Ye: School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310023, China
Zhenyan Chen: School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310023, China
Liquan Wu: School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310023, China
Baoping Zou: School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310023, China

Sustainability, 2024, vol. 16, issue 18, 1-16

Abstract: The preservation of the ancient seawall site is a focal point and challenge in the protection of historical relics along Hangzhou’s Grand Canal in China. This endeavor holds significant historical and contemporary value in uncovering and perpetuating Hangzhou’s cultural heritage. Researchers investigating the Linping section of the seawall site aimed to address soil site deterioration by selecting environmentally friendly alkali-activated slag cementitious materials and applying the response surface method (RSM) to conduct solidification experiments on the seawall soil. Researchers used the results of unconfined compressive strength tests and microscopic electron microscopy analysis, considering the comprehensive performance of soil solidification mechanisms and mechanical properties, to establish a least-squares regression fitting model to optimize the solidification material process parameters. The experimental results indicate that the optimal mass ratio of lime, gypsum, and slag for achieving the best solidification process parameters for the seawall soil, with a 28-day curing period, is 1:1.9:6.2. This ratio was subsequently applied to the restoration and reconstruction of the seawall site, with parts of the restored seawall exhibited in a museum to promote the sustainable conservation of urban cultural heritage. This study provides theoretical support and practical guidance for the protection and restoration of soil sites.

Keywords: silty clay from the seawall site in Hangzhou; composite solidification agent; response surface methodology; optimization of process parameters; alkali-activated slag cementitious materials (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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