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Feasibility Study of Transforming Excavated Clayey Soil into ‘Sand-Like’ Material
https://orcid.org/http://orcid.org/0000-0001-5243-2049
In order to upcycle clayey soil, which generally has poor strength properties, it was proposed to transform them into a more useable ‘sand-like’ material using sintering technology in this feasibility study. A muffle furnace was adopted to heat the clayey soil at different sintering schedules. The results showed that the well sintered ‘sand-like’ pallets had a friction angle (about 34–37°) in the same range as a typical medium dense sand. The sintered product’s permeability was found to be in the order of 1 × 10−3 m/s, which is similar to the gravel-sand mixtures category. The maximum dry unit weight and optimum moisture content in compaction behaviour were slightly lower than a typical silty sand-gravel. Mineralogy check and soil fabric check using X-ray diffraction (XRD) and scanning electron microscopy (SEM) showed that the kaolinite (weak mineral) had been transformed into metakaolinite (stronger mineral) in the ‘sand-like’ material. The sintered product was almost irreversible through the acid and saltwater dissolvability test. All the findings confirmed that it is feasible to produce “sand-like” material from excavated clayey soil through sintering technology.
Feasibility Study of Transforming Excavated Clayey Soil into ‘Sand-Like’ Material
https://orcid.org/http://orcid.org/0000-0001-5243-2049
In order to upcycle clayey soil, which generally has poor strength properties, it was proposed to transform them into a more useable ‘sand-like’ material using sintering technology in this feasibility study. A muffle furnace was adopted to heat the clayey soil at different sintering schedules. The results showed that the well sintered ‘sand-like’ pallets had a friction angle (about 34–37°) in the same range as a typical medium dense sand. The sintered product’s permeability was found to be in the order of 1 × 10−3 m/s, which is similar to the gravel-sand mixtures category. The maximum dry unit weight and optimum moisture content in compaction behaviour were slightly lower than a typical silty sand-gravel. Mineralogy check and soil fabric check using X-ray diffraction (XRD) and scanning electron microscopy (SEM) showed that the kaolinite (weak mineral) had been transformed into metakaolinite (stronger mineral) in the ‘sand-like’ material. The sintered product was almost irreversible through the acid and saltwater dissolvability test. All the findings confirmed that it is feasible to produce “sand-like” material from excavated clayey soil through sintering technology.
Feasibility Study of Transforming Excavated Clayey Soil into ‘Sand-Like’ Material
https://orcid.org/http://orcid.org/0000-0001-5243-2049
In order to upcycle clayey soil, which generally has poor strength properties, it was proposed to transform them into a more useable ‘sand-like’ material using sintering technology in this feasibility study. A muffle furnace was adopted to heat the clayey soil at different sintering schedules. The results showed that the well sintered ‘sand-like’ pallets had a friction angle (about 34–37°) in the same range as a typical medium dense sand. The sintered product’s permeability was found to be in the order of 1 × 10−3 m/s, which is similar to the gravel-sand mixtures category. The maximum dry unit weight and optimum moisture content in compaction behaviour were slightly lower than a typical silty sand-gravel. Mineralogy check and soil fabric check using X-ray diffraction (XRD) and scanning electron microscopy (SEM) showed that the kaolinite (weak mineral) had been transformed into metakaolinite (stronger mineral) in the ‘sand-like’ material. The sintered product was almost irreversible through the acid and saltwater dissolvability test. All the findings confirmed that it is feasible to produce “sand-like” material from excavated clayey soil through sintering technology.
Feasibility Study of Transforming Excavated Clayey Soil into ‘Sand-Like’ Material
Lecture Notes in Civil Engineering
Atalar, Cavit (editor) / Çinicioğlu, Feyza (editor) / Koh, Juan-Wei (author) / Subramanian, Sathyamoorthy (author) / Chew, Soon-Hoe (author) / Tan, Yeow-Chong (author) / Teo, Cheng-Soon (author) / Koh, Meng-Yang Charmaine (author) / Foo, Hui-Bin Grace (author) / Cheung, Ting-Hong Hadley (author)
International Conference on New Developments in Soil Mechanics and Geotechnical Engineering ; 2022 ; Nicosia, Cyprus
5th International Conference on New Developments in Soil Mechanics and Geotechnical Engineering ; Chapter: 44 ; 453-462
2023-03-13
10 pages
Article/Chapter (Book)
Electronic Resource
English
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