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An Experimental Study on Flexural Tensile Strength and Bond Strength Between Concrete-to-Concrete  

Yang, In-Hwan (군산대학교 토목공학과)
Yoo, Sung-Won (우석대학교 토목환경공학과)
Seo, Jung-In (우석대학교 토목환경공학과)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.13, no.3, 2009 , pp. 155-163 More about this Journal
Abstract
The purpose of this paper is to investigate the bond strength between old and new concrete as well as flexural tensile strength of concrete. To achieve this purpose, a comprehensive experimental program has been set up and strength tests using a series of specimens have been carried out. The present study represents that the flexural bond strength between old and new concrete is much smaller than that of flexural tensile strength. The ratio of bond strength to flexural tensile strength ranged through 15~27%. It is seen that concrete-to-concrete bond strength has been affected by curing condition. Also, test results of tensile strength show that recommendation by ACI 363 committee is estimated to be more realistic than another recommendations for predicting tensile strength of concrete.
Keywords
Bond strength; Flexural tensile strength; New concrete; Old concrete;
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