Year-end Sale % OFF 
Abstract
The deterioration of soil-cement in a saline environment leads to a reduction in strength and an increase in permeability. Effective methods of determining the deteriorated layer permeability coefficient of soil-cement are currently lacking. A laboratory test method for measuring the permeability coefficient of the deteriorated layer was proposed using the modified permeability coefficient testing apparatus. According to the proposed method, the permeability coefficient of the deteriorated layer could be obtained after testing the permeability coefficient of the soil-cement specimen in acuring room and testing the equivalent permeability coefficient and deterioration depth of the soil-cement specimen in a deteriorated environment. Using the marine dredger fill from Jiaozhou Bay as a case study, the deteriorated layer permeability coefficients of soil-cements with different cement contents were tested. It turned out that the permeability of the deteriorated layer increases with age. At the beginning of the curing age, higher cement content led to a smaller permeability coefficient of the deteriorated layer of soil-cement. As the curing age increased, the deteriorated layer permeability coefficient of the soil-cement with higher cement content increased. The evolution of the permeability coefficient of a deteriorated layer with age can be formulated as the Logistic function. This study provides support for anti-permeability designs of soil-cement structures in saline environments.
Highlights
A soil-cement mixture is proportionally mixed and evenly stirred with cement, soil, water, and admixtures
Based on Darcy’s law, this study proposed a novel laboratory test method to find the deteriorated layer permeability coefficient of soil-cement and modified the existing test apparatus
It is indicated that as curing age increases, the growth rate of the deterioration depth of soil-cement specimens gradually decreases, while at the same curing age, deterioration depth increases with an increase in cement content
Summary
A soil-cement mixture is proportionally mixed and evenly stirred with cement, soil, water, and admixtures. In some cases, such as landfills, coastal sedimentary soils, and marine dredger fills, the ground water and ground soil are highly corrosive. Soil-cement in a corrosive environment for a long time period will inevitably deteriorate. This deterioration significantly reduces strength and increases the permeability coefficient, which has adverse effects on strength properties and service life. Terashi et al first proposed the concept of soil-cement deterioration and found that the deterioration decreased the effective diameter of the soil-cement pile [3]. Hayashi investigated properties of the treated soil columns constructed by the dry method of deep mixing (DJM)about 17 years ago
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
