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Heat-Induced Bonding of Sands
Typical cementation-based soil stabilization techniques involve the use of mineral cementing agents (e.g., Portland cement, calcium carbonate). Although strong, these agents are brittle and may dissolve in acidic environments. A novel cementation method is addressed in this work: sand with added polymer fines is heated and cooled. The soil transforms into a bonded (cemented) agglomerate with durable, acid-resistant, and ductile interparticle bonds. Results show that the unconfined compressive strength of polymer-bonded sand is an order of magnitude larger than that of mineral-cemented sand at 2% binder. Post-failure mechanical recovery through heat-induced "healing" of the soil-polymer agglomerate is assessed via small-strain stiffness measurements. The data show 80% stiffness recovery, stable after the first cycle of heat-induced healing.
Heat-Induced Bonding of Sands
Typical cementation-based soil stabilization techniques involve the use of mineral cementing agents (e.g., Portland cement, calcium carbonate). Although strong, these agents are brittle and may dissolve in acidic environments. A novel cementation method is addressed in this work: sand with added polymer fines is heated and cooled. The soil transforms into a bonded (cemented) agglomerate with durable, acid-resistant, and ductile interparticle bonds. Results show that the unconfined compressive strength of polymer-bonded sand is an order of magnitude larger than that of mineral-cemented sand at 2% binder. Post-failure mechanical recovery through heat-induced "healing" of the soil-polymer agglomerate is assessed via small-strain stiffness measurements. The data show 80% stiffness recovery, stable after the first cycle of heat-induced healing.
Heat-Induced Bonding of Sands
Valdes, Julio R. (author) / Cortes, Douglas D. (author)
Geo-Congress 2014 ; 2014 ; Atlanta, Georgia
Geo-Congress 2014 Technical Papers ; 3721-3733
2014-02-24
Conference paper
Electronic Resource
English
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