11/7/2014 Civil Engineering Horizon - Water quality effect on concrete strength by Ayininuola -Construction materials

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WATER QUALITY EFFECT ON CONCRETE COMPRESSIVE STRENGTH: OGUNPA STREAM WATER CASE STUDY

Gbenga Matthew Ayininuola

Department of Civil Engineering University of Ibadan, Ibadanayigbenga@yahoo.com or gm.ayininuola@mail.ui.edu.ng

+2348056131662Abstract

The study centred on the effect of water quality on concrete compressive strength development with Ogunpa streamwater as a case study. Two concrete mixes 1:1:2 and 1:1.5:3 with water / cement ratio of 0.6 were investigated. Watersamples from two sections of Ogunpa stream and University of Ibadan Water Treatment Plant (potable water) were used tocast 288 concrete cubes. The cured cubes were crushed on day 7, 14, 21, 28, 56 and 84 for compressive strengthestimation. The chemical constituents of the water samples were determined in the laboratory. The results showed that thecompressive strength of concrete cubes made with potable water increased with days while those of Ogunpa stream declinedafter 14 day of concreting. The chemical analyses revealed that Ogunpa stream contained high concentrations of sodium Na,potassium K, chloride Cl-, and carbonate CO3- amongst others which led to concrete strength reduction. Consequently,proper water analysis should be encouraged before choosing water for concrete work.

Keyword: water analyses, potable water, stream water, compressive strength, concrete mixes, concrete cubes

Abstract Introduction Methodology Result Discussion Conclusions References Date of publication of this paper: 16 November, 2009

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