Volume :

3

Issue :

1

Abstract :

High performance concrete appears to be a better choice for a strong and durable structure. In this project, investigations were carried out on strength properties such as compressive strength, split tensile strength and flexural strength of M75 grade of HPC mixes with different replacement levels such as 10%, 20%, and 30% of foundry sand with fine aggregate and 10%, 20%, 30% and replacing cement by mineral admixtures such as fly ash and ground granulated blast furnace slag by adopting water-binder ratio of 0.3. Conplast SP430 is based on Sulphonated Napthalene Polymers can be used as a super plasticiser for better workability for high performance concrete. The HPC mix, grade M75 concrete is designed as per ACI 211.4R-08 “Guide for selecting proportions for high strength concrete with Pozzolana Portland cement and other cementitious materials”. Mechanical characteristics like Compressive strength, Split-tensile strength, Flexural strength were examined. The result of these investigations demonstrates the strength characteristics of foundry sand based concrete mixes. Based on the results obtained, the replacement of 30% foundry sand with 3% of super plasticiser which superior strength characteristics was arrived. The details of the investigations along with the results are presented in this report.