Effect of curing period on the electrical resistivity of Type I and Type IP cement concrete with volcanic pumice as coarse aggregate.

Date

10-2012

Degree

Bachelor of Science in Civil Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Polinag, Jason A.

Committee Member

Ana , Eliseo V. Jr.

Abstract

The study investigates the electrical resistivity, a key durability parameter, of concrete with volcanic pumice (VP) as coarse aggregate. Electrical resistivity is the resistance of a material against electric current. High electrical resistivity indicates high durability. Direct current (DC) electrical resistivity test was used on concrete samples with varying curing period (7, 28, 56 and 90 days) and cement type (Type I and Type IP) while maintaining the water to binder (w/b) ratio of 0.5. Concrete specimens were exposed to 3% Sodium Chloride (NaCl) solution in order to test its resistance to transport chloride ions which are corrosion agents. The electrical resistivity and chloride penetration depths of the VP concrete specimens, after 30 days and 60 days in 3% NaCl Solution exposure, were also measured. It was found that electrical resistivity of VP concrete increases as the curing period increases. Also, it was observed that Type IP VP concrete exhibited higher electrical resistivity all throughout the study compared to Type I VP concrete. The study also showed that electrical resistivity has inverse relationship with chloride penetration depths - the higher the electrical resistivity, the lower the chloride penetration depth.

Language

English

Location

UPLB College of Engineering and Agro-Industrial Technology

Call Number

Thesis

Document Type

Thesis

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