Unified assessment of mass loss behaviors in soluble, biodegradable, and internally erodible geomaterials  

作　　者：Yuliang Guo Budi Zhao Xiaoqing Pi Xunchang Fei 

机构地区：[1]School of Civil and Environmental Engineering,Nanyang Technological University,50 Nanyang Avenue,639798,Singapore [2]Residues and Resource Reclamation Centre,Nanyang Environment and Water Research Institute,1 Cleantech Loop,637141,Singapore [3]School of Civil Engineering,University College Dublin,Richview Newstead Belfield,Dublin,4,Ireland

出　　处：《Journal of Rock Mechanics and Geotechnical Engineering》2025年第2期1120-1133,共14页岩石力学与岩土工程学报(英文)

基　　金：Nanyang Technological University(NTU,Singapore)and Nanyang Environment and Water Research Institute for the financial support and scholarships of this research.

摘　　要：Dissolution of soluble soil,biodegradation of municipal solid waste(MSW),and internal erosion of gap-graded soil are typical mass loss processes of geomaterials,which result in various engineering problems.These three processes are conceptually analogous and examined by a unified assessment of their behaviors considering the initial properties of geomaterials and testing conditions.This study collected additional data from twelve soil dissolution tests and five long-term MSW biodegradation tests.We then established a comprehensive mass loss behavior dataset based on the available studies and the supplementary data obtained from this study.In addition to the flow-reactive fraction,two initial volumetric properties are also critical,which are void ratio before mass loss(esolid,0)and inert-to-reactive size ratio.A characteristic parameter(Λ),describing the ratio between the change in voids volume and the change in flow-reactive solids volume,is correlated with the strain and change in esolid.The volumetric and structural changes of all the flow-reactive geomaterials are categorized into Λ=−1 for pseudo-stable,−1≤Λ<0 for collapsible,0≤Λ<esolid,0 for hyper-collapsible,and Λ≥esolid,0 for readily densified.A three-dimensional plot constructed by the three critical initial properties is divided into eight zones based on the differentΛvalues,which correspond to distinct mass loss behaviors.The a priori Λ estimation and corresponding zonation for a wide variety of flow-reactive geomaterials is shown to be beneficial for research and practice.

关 键 词：Laboratory tests Soluble soil Municipal solid waste Particle-scale behavior Fabric/structure of soils 

分 类 号：X70[环境科学与工程—环境工程]