Weathering Types,Mechanism and Protection of Rammed Earth Sites:Progress and Prospect
Liu Huaiyu
Chen Yonggui
Li Jiahui
Zhang Tao
Jiang Yan
Ye Weimin
He Haiping
Abstract：Natural climate makes rammed earth sites develop weathering disease,threatening its stable preservation.In this paper it summarizes the types of weathering diseases of sites,expounds the research progress of the evolution law and mechanism of the diseases,and analyzes the protection and reinforcement methods and applicability.The weathering of the site is affected by physical,chemical and biological processes.The mechanical strength and surface hardness decrease with the weathering process,and the thermal physical parameters of the topsoil and the internal rammed soil are significantly different.The coupling of water,temperature,wind and salt makes the surface of the site tend to form a crust-loose layer,and its pores are double-porosity structure,which makes the water retention mode be different from that of the inner rammed soil.Under the action of the environment,the loose layer produces stress fatigue before the crust,and the crust peeling occurs.All the common protection and reinforcement methods except microbial induced calcite precipitation(MICP)have been applied in engineering.The rammed earth site has been in the unsaturated state for a long time,and most of the existing results focus on the saturated state,which cannot accurately describe the evolution of the hydraulic and mechanical behavior and the pathogenic mechanism of the actual working condition,so it is urgent to further study.
Keywords：rammed earth sitesweatheringnatural environmentsoluble saltcapillaritywater-salt transportationengineering geology
Publication Date：2025-06-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：14( 2284-2297 )