Investigation on the compressive strength of concrete with rice hull ash as partial replacement for cement and ceramic tiles as partial replacement for coarse aggregates

Date

7-2016

Degree

Bachelor of Science in Civil Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Nimfa Maren S. Tabucal

Abstract

The study investigated the effect of rice hull ash (RHA) as partial replacement for cement and ceramic tiles as partial replacement for coarse aggregates on the compressive strength of concrete. The particle size of RHA used was 75μm and at a water-to-cement ratio of 0.5, six percent replacements were made (0%, 5%, 10%, 15%, 20%, and 25% for RHA and 20% for ceramic tiles) each batch having five specimens. After 28 days of curing, the unit weight of concrete became lighter as the percent replacement of RHA increased. The lightest unit weight was at 25% RHA replacement having a value of 2259.53 kg/m³, which was a 10.70% reduction in weight compared with the control mix. The compressive strength of concrete increased for 5% and 10% RHA replacement having values of 24.81 and 24.42 MPa respectively after 28 days of curing with at 5% RHA replacement having the largest increase in compressive strength of about 4.44% from the control mix. At 15% to 25% RHA replacement, the compressive strength decreased with at 25% RHA replacement having the lowest value of 18.06 MPa, which was about 23.97% decrease in strength compared with the control mix. Based on the results, RHA replacements of 5% and 10% produced a signifiant increase in compressive strength while a further increase in RHA content decreases the compressive strength of concrete.

Language

English

Location

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

Call Number

LG 993.5 2016 E63 /M34

Document Type

Thesis

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