Investigation on chloride resistance of type 1 and IP cement mortars in submerged exposure condition using chloride ion concentration test

Date

2011

Degree

Bachelor of Science in Civil Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Eliseo V. Ana, Jr.

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Abstract

This study investigated the chloride resistance of Type I and Type IP cement mortars in submerged condition using chloride ion concentration test. Cylindrical mortar specimens (100mm x 200mm) were prepared using different water-cement ratios (0.55, 0.60, and 0.65) and different curing periods (7 and 28 days). The specimens were exposed to chloride attack by submersion to 3% sodium chloride (NaCl) solution for 30 and 60 days. At the end of the exposure, the chloride concentration at 0-25mm and 26-50mm depths were measured by titration with 0.1 M AgNO3 solution.

Results show that Type IP cement mortars have lower chloride concentration than Type I cement mortars. This result was further enhanced by using longer curing period. Pozzolanic reaction that occurred in Type IP cement mortars with longer curing period lead to the formation of calcium silicate hydrate (CSH) that eventually increased the resistance of the specimens against chloride attack. Lastly, lower water-cement ratios lead to lower chloride concentration for both Type I and IP cement mortar specimens which is consistent with the results from past related studies.

Language

English

LC Subject

Concrete materials, Concrete construction--Testing

Location

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

Call Number

LG 993.5 2011 E63 G66

Document Type

Thesis

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