Effects of Admixtures on the Properties of Corn Cob Ash Cement Concrete

Raheem, Akeem Ayinde and Oyebisi, S.O and AKINTAYO, Stephen Oluyemi and OYENIRAN, Mutiu Iyiola (2010) Effects of Admixtures on the Properties of Corn Cob Ash Cement Concrete. Leonardo Electronic Journal of Practices and Technologies, 16. pp. 13-20. ISSN 1583-1078

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Abstract

The study investigated the effects of admixtures on the properties of corn cob ash (CCA) cement concrete. The workability and compressive strength of CCA cement concrete incorporated with accelerator, plasticizer and water reducing and retarding were carried out. The dosage of admixture incorporated was: 0.124litre per 15.55kg of cementitious material based on the recommendation by BS EN 934-2.The results revealed that admixtures generally improve the workability of corn cob ash cement concrete. The compressive strength obtained at 28th day for concrete without admixture (The Control) was 29.82N/mm2, while for concrete with accelerator, plasticizer, and water reducing and retarding it was 32.80 N/mm2, 38.51 N/mm2 and 34.09 N/mm2 respectively. These results showed that CCA cement concrete incorporated with accelerator achieved greater strength at early ages. With plasticizer, it achieved very high strength at both young and old ages; while with water reducing and retarding it achieved greater strength at old ages alone.

Item Type:	Article
Uncontrolled Keywords:	Admixtures; Corn cob ash (CCA); Workability; Compressive strength.
Subjects:	T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Faculty of Engineering, Science and Mathematics > School of Civil Engineering and the Environment
Depositing User:	Mrs Hannah Akinwumi
Date Deposited:	02 Oct 2018 11:15
Last Modified:	02 Oct 2018 11:15
URI:	http://eprints.covenantuniversity.edu.ng/id/eprint/11952

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