Cost Effectiveness of Replacing Sand with Crushed Granite Fine (CGF) In the Mixed Design of Concrete

Abstract

The economic gain of replacing sand with Crushed Granite Fines in the production of concrete was investigated. Compressive strength and slump tests were performed on fresh and hardened concrete using two nominal mixes of 1:1:2 and 1:1½: 3 with the sand component being partially replaced with Crushed Granite Fines. Compressive strength values above 30 N/mm² and 35 N/mm² were obtained for nominal mixes of 1:1:2 and 1:1½: 3 respectively when sand was partially replaced with 25-37.5% Crushed Granite Fines. Based on the economic analysis of the test results, replacement of sand with 25-37.5% Crushed Granite Fines is recommended for use in concrete production.