Investigation on chloride penetration of type 1 and type 1P cement concrete with varying curing times submerged in marine environment using colorimetric method.

Date

2-2013

Degree

Bachelor of Science in Civil Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Melvin B. Solomon

Committee Member

Eliseo V. Ana, Jr. Dan Michael A. Sadia

Abstract

The study investigated the chloride penetration resistance of Type I and Type IP cement concretes exposed in marine environment. the effect of curing time was studied if it has significant effect on the chloride penetration depth on concrete. Actual and laboratory marine environment were also compared. In the laboratory simulated conditions, 3% chloride solution was used while the actual marine environment, located in San Luis Batangas. at 3.15% salinity. The chloride penetration depth was obtained using Colorimetric Test. The freshly transversely cut concrete specimen was then sprayed with 0.1 AgNO₃ solution to allow the chloride ions to react in order to have a clear color discoloration . Overall, the Type I cement concrete showed significant higher chloride resistance than the Type IP cement concrete. The better performance showed by the Type I cement concrete against the Type IP cement concrete can be accounted for the lower pozzolanic content of the former than the latter. The curing times were set to 7 and 28 days. The specimens cured by 28 days showed significant higher chloride resistance than that of the specimens cured by 7 days. With longer curing time, the concrete microstructure is developed. The porosity of the cement decreases as curing time increases because of the reaction of calcium content of the cement to the water.

Language

English

Location

UPLB College of Engineering and Agro-Industrial Technology (CEAT)

Call Number

LG 993.5 2013 E63 O78

Document Type

Thesis

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