Effect of water-to-binder ratio on the chloride resistivity of type 1 cement concrete with Rice Husk Ash (RHA), exposed to seawater, using colorimetric method.

Date

4-2013

Degree

Bachelor of Science in Civil Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Joseph M. Caburnay

Committee Member

Eliseo V. Ana Richelle G. Zafra

Abstract

ESTEBAN, KRISTOFFER JOHN RAMO College of Engineering and Agro-Industrial Technology, University of the Philippines Los Banos. April 2013. Effect of Water-to-binder Ratio on the Chloride Resistivity of Type I Cement Concrete with Rice Husk Ash (RHA) Exposed to Seawater Using Colorimetric Method.

Major Adviser: Engr. Joseph M. Cabumay

This study investigated the effect of varying water-to-binder ratio (w/b) on the chloride resistivity of Type I cement concrete with the addition of crystalline rice husk ash (RHA). The RHA is used as partial cement replacement. The experiments were carried out in actual marine environment. Four different water-binder ratios were considered (0.65, 0.60, 0.55, 030), curing duration (28 days) and submersion period (60 days) were held constant for all the mix designs. A constant percent replacement of 20% was used for all cement mixes. Chloride penetration depths were measured using AgNO3- based colorimetric test. It was found out that at 28 days curing, the penetration depth in concrete specimens, with or without RHA content, decreased with decreasing w/b. However, differences in values were regarded as insignificant which renders the w/b as not having extensive effect on the chloride penetration resistance of concrete at a submersion period of 60 days. The study also concluded that for low curing periods, with the incorporation of 20% RHA into the mix, the aim of reducing the amount of cement to be used without compromising the performance is not realized.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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