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The Influence Of Compactive Effort On The Desiccation - Induced Volumetric Shrinkage Of Compacted Bagasse Ash Treated Foundry Sand As Hydraulic Barrier Material

Submitted2015-08-06
Last Update2015-10-10
TitleThe Influence Of Compactive Effort On The Desiccation - Induced Volumetric Shrinkage Of Compacted Bagasse Ash Treated Foundry Sand As Hydraulic Barrier Material
Author(s)Author #1
Author title:
Name: Kolawole Osinubi
Org: Department of Civil Engineering, Ahmadu Bello University, Zaria 810001, Nigeria
Country:
Email: kosinubi@yahoo.com

Author #2
Author title:
Name: George Moses
Org: Department of Civil Engineering, Nigerian Defense Academy, P.M.B. 2109, Kaduna, Nigeria
Country:
Email: doveeagle4al@yahoo.com

Other Author(s)
Contact AuthorAuthor #1
Alt Email: kosinubi@yahoo.com
Telephone:
KeywordsBagasse ash, Compaction, Volumetric shrinkage strain
AbstractLaboratory tests were conducted to assess the effect of compactive effort on the desiccation-induced volumetric shrinkage strain of compacted waste foundry sand treated with up to 8% bagasse ash (a pozzolana) by dry weight of foundry sand for use as a hydraulic barrier material in waste containment applications. The compative energy levels of reduced British standard light (RBSL), British standard light (BSL), West African standard or �intermediate� (WAS) and British standard heavy (BSH) efforts were utilized at molding water contents of 2% dry of optimum, 0% optimum moisture content and 2% and 4% wet of optimum. A compaction plane of acceptable values for volumetric shrinkage strain (VSS) based on the regulatory value ≤ 4% was used to assess the effect of compactive effort on desiccation-induced shrinkage of bagasse ash treated foundry sand. Higher compactive effort generally recorded less volumetric shrinkage strain values. Generally, VSS values increased with higher molding water content and increased with higher initial degree of saturation for all compactive efforts. However, at 6% and 8% bagasse ash treatment levels, higher compactive effort, did not result in lower VSS values, especially at WAS and BSH compactive efforts. This can be attributed to the lack of sufficient water at higher compactive efforts to meet the hydration demands at higher treatment levels.
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