The effects of fire on compressive and tensile strength of natural fiber-reinforced concrete

Date of Publication

2014

Document Type

Bachelor's Thesis

Degree Name

Bachelor of Science in Civil Engineering with Specialization in Structural Engineering

Subject Categories

Civil Engineering

College

Gokongwei College of Engineering

Department/Unit

Civil Engineering

Thesis Adviser

Bernardo A. Lejano

Defense Panel Chair

Andres Winston C. Oreta

Defense Panel Member

Richard De Jesus
Jonathan Dungca

Abstract/Summary

The study investigates on natural fiber reinforced concrete (NFRC) and its effects when exposed to fire. Three natural fibers are considered in this study, and these are abaca, coir, and rice husk fibers. Two types of fiber content percentage were used to observe the trend of possible strength increase and reduction due to fire exposure. The optimal values in terms of volume fraction were determined from previous studies for each fiber (0.5 for abaca, 1.0 for coir, 1.5 for rice husk). To evaluate the performance of NFRCs, the performance of plain concrete is used as reference. Compressive strength and splitting tensile strength were determined for the NFRC and plain concrete specimens. Paired-sample T-test statistical analysis was used to determine the significance in terms of increase and reduction in strength of the NFRCs with respect to the plain concrete. The optimal value for abaca fiber displayed the greatest tensile strength before exposure to fire (3.362 MPa). It was then determined that the optimal value for coir fiber displayed the greatest increase in compressive and tensile strength (27.08 MPa and 3.29 MPa, respectively) among the three fibers just before it was exposed to fire. However, it also displayed the greatest decrease in tensile strength after it was exposed to fire. The optimal value for rice husk fiber displayed the greatest decrease in compressive strength after exposure to fire, displaying a 19.65% decrease.

Abstract Format

html

Language

English

Format

Print

Accession Number

TU18720

Shelf Location

Archives, The Learning Commons, 12F, Henry Sy Sr. Hall

Physical Description

vii, 98 leaves : illustrations (some colored) ; 28 cm.

Keywords

Fiber-reinforced concrete; Concrete slabs--Standards; Concrete panels--Standards

Embargo Period

12-6-2021

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