- Title
- Overview of the swelling problem in relation to injection of expanding resin in expansive soils
- Creator
- Buzzi, Olivier P.; Fityus, Stephen G.; Sloan, Scott W.
- Relation
- 4th Asia Pacific Conference on Unsaturated Soils (Unsat 2009). Unsaturated Soils: Experimental Studies in Unsaturated Soils and Expansive Soils: Proceedings of the 4th Asia Pacific Conference on Unsaturated Soils, Volume 1 (Newcastle, N.S.W. 23-25 Novermber, 2009) p. 471-476
- Publisher
- CRC Press
- Resource Type
- conference paper
- Date
- 2010
- Description
- Injection of expansive polyurethane resin can be used to remediate differential settlements issues. The resin is injected incrementally under the structure to achieve a desired foundation level, forming a composite resin-clay material. This solution is not well documented in the literature and some questions arise on the long term performance of the solution. As injection is usually carried out in a settled soil mass which is dry and dessicated, re-hydration of the soil after injection might lead to swelling of the leveled foundation and overlifting of the structure. Experimental research undertaken is presented here to investigate this re-hydration issue and to determine if there is a risk of over-lifting in the long term. In situ and laboratory testing was undertaken in order to investigate the most fundamental aspects of the problems. The study includes in situ injection of resin, study of resin propagation in the soil mass, influence of resin on the hydraulic conductivity of the soil mass and large scale swelling tests. The results suggest that, even though the resin can not prevent the re-hydration of the soil mass, the risk of over lifting in the long term is limited.
- Subject
- polyurethane resin; resin injection; building foundations; soil re-hydration; swelling
- Identifier
- http://hdl.handle.net/1959.13/933666
- Identifier
- uon:11684
- Identifier
- ISBN:9780415877176
- Language
- eng
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