Sharada Polusani. International Journal of Engineering Research and Applications www.ijera.com ISSN: 2248-9622, Vol. 10, Issue 7, (Series-III) July 2020, pp. 10-14 www.ijera.com DOI: 10.9790/9622-1007031014 10 | Page Effect of corrosion in different types of blended concrete Effect of corrosion in different types of blended concrete Sharada Polusani* *(Department of Civil Engineering, Mahatma Gandhi Institute of Technology, Hyderabad ABSTRACT Reinforced concrete is widely used for various types of structures. The corrosion of reinforcement decreases the strength and the service life of the structures. Reinforced concrete structures constructed in areas with chloride, sulphate and floride content are affected by corrosion. The aim of the study is to determine the effect of chloride induced corrosion on compressive strength of various types of blended concrete. For the experimental investigation blended concrete partially replaced with 10% metakaolin and Fly Ash 10%, 20%,30%, 40%,concrete blended with 10% metakaolin and10%, 20%, 30%, 40% GGBS , concrete blended with 10% metakaolin and 5%, 10%, 15%, 20% Rice Husk Ash are studied. The different concrete cube specimens are corroded in an accelerated corrosion setup. The compressive strength reduction and corresponding degree of corrosion are determined. Keywords: accelerated corrosion, compressive strength, fly ash, GGBS,Metakaolin, Rice Husk Ash --------------------------------------------------------------------------------------------------------------------------------------- Date of Submission: 20-06-2020 Date of Acceptance: 07-07-2020 --------------------------------------------------------------------------------------------------------------------------------------- I. INTRODUCTION Reinforced concrete is widely used in construction due to its low cost and easy availability.It is extensively used in the construction of buildings, airports, bridges, harbours, tunnels etc. Reinforced concrete structures in aggressive environments undergo deterioration and loses its long-term performance, reliability and durability. The aggressive environment can be due to chloride attack or carbonation attack. Chloride ions usually comes from marine environment, usage of de-icing salts in colder regions, usage of chloride contaminated aggregates or usage of chloride contaminated water in mixing of concrete. Improper or negligence in consideration of corrosion prone environments in design leave the structure prone to corrosion attack from the initial stage itself. Even though the corrosion occurs over a long period of time, but it still drastically affects the useful service life and functionality of the structure and sometimes it even leads to the failure of the structure. The increased maintenance and repair costs of corroded structures is also a serious concern. Metakaolin ,Fly ash, ground granulated blast furnace slag and Rice Husk Ash are said to have durable properties. In this paper the chloride induced corrosion and its effect on the compressive strength of ordinary concrete, concrete partially replaced with a constant replacement of Metakaolin in all the mixes with Fly ash in 10%, 20%, 30% and 40%,concrete partially replaced with GGBFS in 10%, 20%, 30% and 40%.and concrete partially replaced with Rice Husk Ash in 5%,10%, 15%, and 20%. II. EXPERIMENTAL PROGRAM 2.1 Materials The ordinary portland cement (Ultra Tech) of 53 grade conforming to IS 12269: 2013 .The properties of cement are given in Table I. River sand corresponding to zone I conforming to IS 383 is used. To prepare the cube specimen for corrosion Sodium Chloride powder of 99.5% chlorine content is used. Hydrochloric acid of acidity35-37% is used to prepare reagent for cleaning the corroded specimen to clean the corroded specimen. Table 1 gives the properties of materials used for experimental program. RESEARCH ARTICLE OPEN ACCESS