Abstract: IS 456:2000 is the most influential and used code in India which plays a leading role related to concrete and reinforced concrete in many areas such as education, design, production, construction etc. Continuous research focuses on gaps in knowledge and the research findings renovate or alter existing codal provisions or add new provisions to raise the role of concrete industry to a higher level of performance. The general environment to which the concrete will be exposed is classified into five levels of severity, that is mild, moderate, severe, very severe and extreme in increasing degree of severity as per Cl 8.2.2.1 of IS 456:2000. A test programme was initiated to investigate the validity of the specified clause of code relative to durability. Of the five environmental exposure conditions, the first two exposure conditions namely mild and moderate cases are taken for investigation. The code specifies that if the detailing of reinforcement is as per code, the currently stipulated increased covers would not adversely affect the crack width development and ensures the durability of concrete. The reported test results show that mere adoption of detailing of steel reinforcement as specified in the code, ensuring durability, relative to crack growth is not totally valid.
Keywords: Crack width, concrete cover, durability, RC slabs.
Title: Experimental Study on the Increased Cover Specifications in IS 456:2000 and the Resulting Crack Width Implications in RC Slabs for Mild and Moderate Exposure
Author: Dr. D. Sree Ramachandra Murty, Durga Venkatesh Reddy
International Journal of Civil and Structural Engineering Research
ISSN 2348-7607 (Online)
Research Publish Journals
