STRUCTURAL STRENGTHENING OF DAMAGED （结构加固受损）.pdfVIP

STRUCTURAL STRENGTHENING OF DAMAGED R.C.C. STRUCTURES WITH POLYMER MODIFIED CONCRETE Suresh Chandra Pattanaik PhD student, KIIT University, Bhubaneswar and Team Head (Advanced Diagnostic Laboratory), Dr Fixit Institute of Structural Protection and Rehabilitation, C/O-Pidilite Industries Limited, Mumbai (Paper published in proceedings of WSRR09 (Workshop 2009 on Rehabilitation and Retrofitting of Structures) held at Indian Institute of Technology, Mumbai from 28th to th 30 August,2009) Abstract: In an aggressive environment like Mumbai polymer modified concrete is very much suitable for repair and rehabilitation of damaged RCC structures because of its excellent moisture resistance properties high early strength .Not only it strengthens the RCC structural members but also makes a highly durable repair. Though FRP has become more effective for retrofitting but polymer modified concrete is being widely used for cost effective. This paper focuses on some of the important properties and step by step approach for structural strengthening of damaged concrete structures with polymer modified concrete. 1.0 Introduction The repair and rehabilitation of damaged concrete structures is quite often in a highly aggressive environment like Mumbai associated with high level of pollution, high humidity through out the year, high rain fall along with higher level of chloride contents in the atmosphere. Ageing of the structure and persistent use after the design life of the structure also leads to deterioration of the structures. There are various products available for repair and rehabilitation but polymer modified concrete is most cost effective for improving the high early compressive strength, tensile and flexural strength and reducing the brittle nature. Polymer-modified concrete particularly latex modified concrete such as styren-butadine, acrylic latex, polyvinyl acetate, and ethylene v