EFFECT OF CHEMICAL ADMIXTURES ON MECHANICAL PPROPERTIES OF ROLLER COMPACTED CONCRETE

S.Krishna Rao, Y.Mohan Sai Kiran

Abstract: This paper presents the experimental work carried out in order to evaluate the mechanical properties of roller compacted concrete mixtures in which a chemical admixture like super plasticizer is added in different dosages. The dosage percentages namely 0.5%, 0.75% and 1% by weight of cement have been added to RCC. Tests we performed to determine workability when RCC is in fresh state and mechanical properties when RCC is in hardened state. Workability like compaction factor test, vee bee test and slump test were conducted. Strength tests like compression strength, modulus of rupture and split tensile strength at 3days, 7days and 28days. Experimental investigation revealed that significant increases in strengths were observed in RCC with increase in super plasticizer dosage addition. Also workability of concrete was increased with increase in SP dosage

Keywords: Roller Compacted Concrete Pavement, Vee Bee Time, Modulus of Rupture, Super Plasticizer

DOI: https://doi.org/10.15623/ijret.2015.0413011