ISSN(Online): 2319-8753 ISSN (Print): 2347-6710 International Journal of Innovative Research in Science, Engineering and Technology (A High Impact Factor, Monthly, Peer Reviewed Journal) Visit: www.ijirset.com Vol. 8, Issue 7, July 2019 Copyright to IJIRSET DOI:10.15680/IJIRSET.2019.0807078 7724 An Experimental Analysis of Sanative Concrete and Its Microscopic Properties J. Sravani [1], D. Nagaraju [2] PG Student (Structural Engineering), Narasarao Peta Engineering College, Narasaraopeta, AP, India [1] Assistant Professor (Civil Engineering), Narasarao Peta Engineering College, Narasaraopeta, AP, India [2] ABSTRACT: Concrete is a mixture of cement, aggregates and water, sometimes admixtures are also added. Cement is the costliest ingredient in concrete. The manufacturing of cement is a huge process in which several tons of carbondioxide is released into the atmosphere. This is a serious problem to the environment to cause pollution. The use of flyash as a partial replacement of cement in concrete is tested as flyash has nearly the same chemical composition as that of cement. Many research works were carried out to study the property of concrete on addition of flyash and the results were noteworthy. Flyash is an industrial waste product, which is formed from the combustion of coal in thermal power plants. Out of the available two types of flyash, Class C flyash is chosen in this experiment as it has the more amount of lime percentage and self cementitious compounds. The experimental work was carried at various percentage replacements of flyash i.e, 0, 5, 10, 15, 20, 25, 30, 35, 40, 50, 60 %. Flyash has the property of late strength formation. So the concrete attains a great amount of strength at 28 days rather than at earlier periods. Due to this property of flyash, concrete behaves as a self healing concrete. Coir is an agricultural waste product, which has proved its use in many applications. The addition of coir into concrete is mainly to increase the tensile strength of concrete. As coir is a fibrous material it has good bonding properties with concrete and helps in crack resistance. Coir in concrete reduces the chance of corrosion occurrence to reinforcement. The specimens of concrete were casted at above mentioned percentages of flyash with constant amount of 0.5% by volume of cement in all the specimens. The concrete was tested for compressive strength and flexural strengths at 28 days. The optimum percentage of flyash and coir which gives the maximum compressive strength and flexural strength is reported. The self healing behaviour of sanative concrete is observed in all the specimens. The use of these waste materials in concrete comparatively reduces the overall cost of the project. KEYWORDS: Flyash, Coir, Compressive strength, Self healing behaviour, Permeability. I. INTRODUCTION Concrete is a brittle material, which has very low tensile strength. As a result, plain concrete members could not resist tensile forces acting on the structures. So concrete members are reinforced with continuous reinforcing bars to withstand tensile stresses and compensate for the lack of ductility and strength. The addition of steel reinforcement significantly increases the strength of concrete and results in concrete with homogenous tensile properties, however the development of micro cracks in concrete structures must be checked. Experiments are carried out to reduce the cost of concrete, which has satisfactorily high strength by using natural waste materials. The use of flyash is introduced as a partial replacement of cement in concrete to lower its cost and to observe the self healing behaviour. The introduction of fibers is generally taken as a solution to develop concrete in view of enhancing its flexural and tensile strength.