Effect of curing period on the electrical resistivity of type I and type IP cement mortar.

Date

2012

Degree

Bachelor of Science in Civil Engineering

Restrictions

Restricted: Not available to the general public. Access is available only after consultation with author/thesis adviser and only to those bound by the confidentiality agreement.

Abstract

This study investigated the electrical resistivity of Type I and Type IP cement mortars as a measure of its durability. Electrical resistivity of cement-based materials is its ability to resist electron transport within its microstructure. Good resistivity indicates good resistance to chemical attack such as chloride. One key factor which effects resistivity is curing period. The effect of different curing periods were investigated on Type I and Type IP mortars with w/c ratio of 0.55 and sand-to-cement ratio of 1:3 cured at 7, 28 and 56 days. After curing specimens were exposed to chloride solution. Results show that combining Type IP cement with curing of 56 days exhibit the highest and significant electrical resistivity after chloride exposure, which can be attributed to the pozzolanic reaction proceeding in this cement type. Moreover, chloride penetration depths were measured and its relation to electrical resistivity was investigated, which showed that Type I cement mortar and curing of 7 days display the weakest resistance to chloride attack. Hence, pozzolanic reaction and longer curing time are key factors to better electrical resistivity and stronger resistance to chloride attack. It is inferred that electrical resistivity and chloride resistance have inverse correlation.

Language

English

Location

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

Call Number

LG 993.5 2012 E63 A74

Document Type

Thesis

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