Effect of water-cement ratio on corrosion of steel bars in type I and type IP cement mortars subjected to accelerated short- term technique using weight loss analysis

Date

10-2012

Degree

Bachelor of Science in Civil Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Zafra, Richelle G.

Committee Member

Caburnay, Joseph M.

Abstract

Corrosion of reinforcing bars is detrimental to structures because it degrades the durability of structures. Presence of chloride ions can cause corrosion of these bars. In this study, the effect of water-to-cement ratio on the corrosion performance of steel in Type I and Type IP cement mortars was evaluated by subjecting the steel bar specimens to five cycles of accelerated short-term technique (cyclic wetting and drying conditions) in sodium chloride solution. Gravimetric weight loss analysis was used to measure the corrosion rate of embedded bars. The effect of water-cement ratios of 0.50, 0.55 and 0.60 at 28 day curing period was investigated. It was found that the effect of water-cement ratio on the corrosion rate is insignificant using one-way ANOVA both for bars in Type I and Type IP because of the short time that the mortar specimens were subjected to the accelerated short-term technique. In comparing the effect of cement type on the corrosion rate, two-way ANOVA shows that a Type I cement mortar offers a better environment in preventing the corrosion of reinforced bars because of the early development of its microstructure as compared to Type IP cement.

Language

English

Location

UPLB College of Engineering and Agro-Industrial Technology

Call Number

Thesis

Document Type

Thesis

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