Experimental Study on Developing High Strength Concrete Mixes as per Indian Standard 10262: 2019

Abstract

The high strength concrete (HSC) is a special type of concrete, whereas it can resist loads more than that normal strength concrete (NSC) and also, it can increase the speed of construction, early removal of formwork provides early strength and better performance, when compared to NSC. In present study attempts to develop M70 grade HSC mixes using IS 10262:2019. Number of trials for HSC mixes were experimented utilizing marginal materials viz. Ground Granulated Blast Slag (GGBS) and Alccofine as filler. The GGBS content, water content and fine to coarse aggregate ratio were maintained; restricting the maximum size of coarse aggregates restricted to 20 mm. The percentage of alccofines (0% to 12%) and GGBS (20%) replace by weight of cement is kept constants for all the mixes. The water content is also kept constant by varying the water to cement ratio accordingly with replacement of alccofines for cement. The fresh properties (slump test) and hardened properties tests compression strength test, split tensile strength test, flexural strength test) on HSC mixes were carried out as per IS codes. The test result shows that the HSC mixes can be developed by using IS 10262:2019 for given grade of concrete and these developed mixes satisfied both the fresh and hardened properties as per codal provisions. And also results shows that 10% alccofines replacement shows the better workability and strength, when compare to 12% replacement with constant GGBS.