Umudike Journal of Engineering and Technology

Michael Okpara University of Agriculture, Umudike


COMPARATIVE ANALYSIS OF COMPRESSIVE STRENGTH OF CONCRETE MADE FROM VARIOUS SIZES OF COARSE AGGREGATES

Ozioko, H. O.
Department of Civil Engineering Michael Okpara University of Agriculture Umudike, Nigeria

Mbadike, E. M.
Department of Civil Engineering Michael Okpara University of Agriculture Umudike, Nigeria



ABSTRACT

The main aim of this study is to carryout comparative analysis of concrete strength made from various sizes of crushed coarse aggregate. In doing so, the suitability of these aggregate sizes as good concrete materials was evaluated. The samples of the crushed coarse aggregate used are; 25mm, 18.75mm, 12.5mm, 9.38mm and quarry dust. Other materials used are river sand as fine aggregate, Ordinary Portland cement and potable water. The mix ratio used was 1:2:4 while the tests carried out are Sieve analysis, Relative density, Absorption capacity, workability and compressive strength test. The results of the study shows that the strength of concrete made from different sizes of aggregate vary. The 12.5mm aggregates size achieved the highest strength of 33.93N/mm after 28 days of curing while the quarry dust has the least strength of 18.37N/mm. It was also observed that as the aggregate size increases, segregation in concrete increases, while homogeneity and absorption capacity decreases. However while the strength of the concrete cubes increases with the curing days in all samples. Finally, it is recommended to use aggregate size of 12.5mm for concrete when a high strength and high velocity concrete is required.



Keywords: Concrete, Coarse, Aggregate, Compressive Strength and Absorption


View: 172 | Download: 1

Published
Wednesday, December 28, 2016

Issue
Vol. 2 No. 2, DEC 2016

Article Section
GENERAL

The contents of the articles are the sole opinion of the author(s) and not of UJET.


Open Access
Umudike Journal of Engineering and Technology makes abstracts and full texts of all articles published freely available to everyone immediately after publication thereby enabling the accessibility of research articles by the global community without hindrance through the internet.

Indexing and Abstracting
We are index in Google Scholar