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Enhancement of engineering characteristics of peaty clay due to mixing with cement

Show simple item record Saputhantiri, DR Kulathilaka, SAS 2017-02-28T05:57:52Z 2017-02-28T05:57:52Z
dc.description.abstract Thick layers of soft peaty clay encountered in recent infrastructure development projects in Sri Lanka had been improved mainly by different techniques of pre-consolidation. Alternatively, if peaty clay is mixed in situ with a binder, such as cement, apozzolonic reaction can be induced causing a fundamental change in microstructure. Greater improvement of strength and stiffness would be achieved more rapidly than with pre-consolidation. Samples of peaty clay obtained from the Southern Transport Development Project were mixed with 15% and 20% of cement by wet weight and the mix was allowed to harden. A surcharge was applied by a special loading arrangement to simulate the overburden pressure under which it will harden in the field. Improvements achieved in strength and stiffness of treated peat were assessed by conducting consolidation tests and unconsolidated undrained triaxial shear tests. The results indicated that significant improvements were achieved in the undrained shear strength and primary and secondary consolidation characteristics. Improvements achieved in secondary consolidation ,characteristics were more significant. Micrographs obtained through Scanning Electron Microscopes (SEM) illustrated the micro structural changes taken place in the peaty clay due to mixing with peat. en_US
dc.language.iso en en_US
dc.subject Peaty clay, Consolidation, en_US
dc.title Enhancement of engineering characteristics of peaty clay due to mixing with cement en_US
dc.type Conference-Abstract en_US
dc.identifier.faculty Engineering en_US
dc.identifier.department Department of Civil Engineering en_US
dc.identifier.year 2011 en_US
dc.identifier.journal Annual Transactions of IESL : The Institution of Engineers, Sri Lanka
dc.identifier.pgnos pp. 118 - 126 en_US

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