Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/223105
Title: EVALUATION OF PARTIAL REPLACEMENT OF FINE AGGREGATE WITH CRABSHELLS IN CONCRETE
Authors: NG JUAT TENG
Keywords: Building
B. Sc. (Project and Facilities Management)
Seah Hsiu Min Eugene
Concrete
Crab shells
Fine aggregates
Issue Date: 17-Jan-2012
Citation: NG JUAT TENG (2012-01-17). EVALUATION OF PARTIAL REPLACEMENT OF FINE AGGREGATE WITH CRABSHELLS IN CONCRETE. ScholarBank@NUS Repository.
Abstract: This paper investigates the suitability of partially substituting fine aggregates in concrete with crab shells. The aim is to determine if the mechanical properties of the new concrete mixes can meet the standards for concrete set by the American Society for Testing of Materials (ASTM) and the Singapore Standards (SS), or surpass the performance of the control mix. This study was motivated by the works of Yang, Yi & Leem (2005), who researched on the possibilities of substituting sand with oyster shells in Korea. Experiments with sand substitution from 0 to 40% have established that 10% sand substituted concrete had the highest compressive strength, indicating the best overall quality. The relative density of crab shells is approximately half of sand, which can affect the absorption ratio and water-cement ratio. It is therefore recommended to mix in crab shells per volume instead. It was also found that the crab shells had negligible potential alkali-carbonate reactivity and insignificant chloride content. Overall, crab shell seems promising as a sand substitute. However, more extensive experiments would have to be conducted under more rigorous conditions, and for a longer period of time to give people greater confidence in this new substitute.
URI: https://scholarbank.nus.edu.sg/handle/10635/223105
Appears in Collections:Bachelor's Theses

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
Ng Juat Teng 2011-2012.pdf1.43 MBAdobe PDF

RESTRICTED

NoneLog In

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.