Investigation on behavior of chloride penetration depth in type 1Pcement concrete with crystalline rice husk ash

Date

2012

Degree

Bachelor of Science in Civil Engineering

Major Course

Major in Agricultural Power and Machinery Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

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Abstract

This study investigated the behavior of the chloride penetration depth of concrete, a key durability parameter, of concrete mixes with the addition of crystalline rice husk ash (RHA). The durability of reinforced and prestressed concrete structures is thus highly dependent on the resistance of concrete to chloride penetration-highchloride resistivity indicates high durability of concrete. Chloride penetration tets were done on concrete samples cntaining 10% and 15% RHA (by mass of total binding material) and results were compared with a control mix containing 100% Type IP Portland cement. Chloride penetration depths were determined by using colorimetrictest after the concrete samples were cured for 7 and 28 days. It was found out that at 28 days curing period, chloride penetration depth of 15% RHA concretes was relatively equal with the control concrete. Also at 28 days curing period, higher contents of RHA resulted in higher chloride resistoivity as compared yto 7 days cured specimens. This improved chloride resistivity maybe attributed to the development of the aggregate-cement interface, called interfacial transition zone, of the concrete pore structure due to the pozzolanic reation of crystalline RHA.Since crystalline RHA is a slow reacting material a highly developed concrete pore structure can only achieved with longer curing period (e.g.28 days).

Language

English

LC Subject

Concrete--Analysis, Concrete--Chemical resistance

Location

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

Call Number

LG 993.5 2012 E63 C36

Document Type

Thesis

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