A study on the applicability of replacing G.I. wires with plastic cable ties in structural members

Date of Publication

2013

Document Type

Bachelor's Thesis

Degree Name

Bachelor of Science in Civil Engineering

Subject Categories

Civil Engineering

College

Gokongwei College of Engineering

Department/Unit

Civil Engineering

Thesis Adviser

Bernardo A. Lejano

Defense Panel Chair

Jonathan R. Dungca

Defense Panel Member

Lessandro Estelito O. Garciano

Alden Paul D. Balili

Abstract/Summary

Reinforced concrete has been a popular choice in the construction of structures these days because of its improved compressive and tensile strength compared to other structural members. Basically, this is plain concrete but with a steel bar assembly established inside, and G.I. wires are used to hold the assembly in place.

However, this is a traditional procedure in assembling the steel bar fortification, and for a non-skilled worker, tying a G.I. wire on a single joint can be tedious and time-consuming, much more if he were to tie every single joint. It takes experience and technique to master the art of G.I. wire tying. This study is about replacing these with commercial plastic cable ties without sacrificing the structural integrity of the reinforced concrete column. The researchers would have to determine the overall strength of the reinforced concrete column used with plastic cable ties, substituting the traditional G.I. wires. Also, an evaluation will be done in which a sample used with plastic cable ties and G.I. wires will be compared, based on strength and tying speed.

Since there is no direct test for tie strength determination in reinforcing steel, the researchers modified the Standard test method for pullout strength of hardened concrete (ASTM C900) in order to get an approximate tie strength. The reinforced concrete members will also be tested based on the Standard Compression Test (ASTM C39). To achieve this, the researchers hereby prepared 60 samples of reinforced concrete 32 tied with plastic cable tie, 16 tied with GI wire, 8 standard pull out specimen, and 4 samples without any steel to be tested with compression test. These samples will be placed into the UTM (Universal Testing Machine) to be subjected with a test associated with the sample.

From these tests, the researchers will be able to procure the tensile strength of the modified sample through the pull out test. A theoretical pull out strength will be solved using a devised formula from the standard pull out test. From there, these two values will be subtracted in order to get the tensile strength of the tie. These same procedures in obtaining the output will be done with the rest of the samples, in which these will be compared to be able to spot key differences between the use of G.I. wires and plastic cable ties, with the aid of statistics, to be able to make a suitable conclusion.

Abstract Format

html

Language

English

Format

Print

Accession Number

TU19886

Shelf Location

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

Physical Description

xi, 94 leaves : illustrations (some colored) ; 28 cm.

Keywords

Electric wire; Electric cables; Reinforced concrete; Wire rope

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