IS 10262:2009 CONCRETE MIX PROPORTIONING – GUIDELINES DATA FOR MIX PROPORTIONING Grade designation; Type of cement Maximum nominal size of aggregate Minimum cement content Maximum water-cement ratio Workability Exposure condition as per table 4 and table 5 of IS 456 Maximum temperature of concrete at the time of placing Method of transporting and placing Early age strength requirement, if required Types of aggregate Maximum cement content Whether admixture shall or shall not be used and the type of admixture and the condition of use. 1. Target Strength of Mix Proportioning f ck ’ = f ck + 1.65s Where ; f ck ’ = Target mean compressive strength at 28 days in N/mm 2 f ck = Characteristic compressive strength at 28 days in N/mm 2 and s = Sta...