Proceeding of

MPGI National Multi Conference 2012

(MPGINMC2012)

National Conference

on

Innovative Approaches in Civil Engineering

A Special Issue of

Indian Research Transaction

(ISSN:2250-0804)

Chief Convener

Dr. Rajiv Dharaskar

Director, MPGI Integrated Campus, Nanded

Convener

Dr. Mrs Sadhana Chidrawar

Dean, School of Engineering, MPGI Integrated Campus, Nanded

Editor

Prof. K. H. Walse

M.S.India

 
 

   
   
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
IRT ISSN: 2250-0804 (Online) >> ISBN: 978-81-906467-0-8    
Title:

Strength Assessment of RCC Beams Subjected To Corrosion

Author:
Anand Kumar B.G
 

Citation

Anand Kumar B.G, "Strength Assessment of RCC Beams Subjected To Corrosion", IRT Proceeding on national conference on Innovative Approaches in Civil Engineering, 7-8 April, 2012, published by Indian research transaction, India


Abstract

The damage assessment of civil structural members is one of the most important and recently emerging fields in engineering. Deterioration of a structure may occur due to a host of factors such as poor workmanship, improper maintenance, atmospheric effects, accidents, natural calamities. Certain causes like environmental effects, natural calamities can not be controlled. Therefore, durability of concrete structures especially those exposed to aggressive environments is of great concern. In spite of many deterioration causes and factors have been investigated in turn corrosion of steel reinforcement was found to be one of the major deterioration problems. Thus, an Engineer may need to examine the state of reinforcement in structures for a number of reasons including assessment for change of use or exposure, routine maintenance, or investigating signs of distress. In turn, there is a requirement for a method that can determine simply, accurately and non-destructively not only whether corrosion of reinforcement is taking place but also its intensity and the rate of damage. The main aim of this paper is to assess and evaluate the corrosion condition of reinforced concrete beams by using Non-destructive test (NDT) methods such as Half-cell potential test, Rebound hammer test, and Ultrasonic pulse velocity test. Also another thrust of this pilot program is to establish a correlation between Rebound hammer number, and Ultrasonic pulse velocity variation versus concrete strength for different degree of corrosion in turn to interpret the effectiveness of degree of corrosion on NDT values as well as concrete compressive strength. For that a total of six reinforced concrete beams (150x150x1000) mm were considered. An impressed current was applied to beams with different degree of corrosion (5%, &10%) in order to accelerate steel corrosion. Mean while electrochemical measurements were carried out to obtain open circuit potential. Finally the results show that the Linear regression analysis is the best fit for the compressive strength prediction relationship by using Rebound hammer and Ultrasonic pulse velocity test at compression as well as tension side of reinforced concrete beam with different degree of corrosion (5%, &10% ).


Keywords Corrosion, Electrochemical test, Ultrasonic pulse velocity test, Rebound hammer test, , Regression analysis

References  
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2012 Indian Research Transaction

Published by Research Publications, India