Experimental mix design approach of reactive powder concrete to recognize compressive strength through non-destructive test

Abstract

Rapid industrialization in concrete industry dominates the infrastructural development globally. Where, the crowded places, old structures, monuments gets maintain and rehabilitate to strengthen then we use high grade concrete. For this purpose we use reactive powder concrete and without destroying the structure know its strength parameters. This investigation mainly focus on mix proportion of different ingredients of reactive powder concrete and check the freshly prepared specimen for non destructive test as per codal provision. Ultrasonic pulse velocity test gives the idea about the uniformity of material, dense particle and homogeneity. Higher the pulse velocity or wavelength which passes through specimen higher is the compression strength. In this examination specimen were prepared from silica fumes, silica sand and steel fiber to achieve the durability. Here, RPC M30 and RPC M60 cubes were prepared and tested after 3, 7, 14, 28 and 90days. The specimen was cured and age by accelerated curing and conventional curing to see increment in compression strength. The accelerated curing temperature was kept 600C with relative humidity 60% and conventional curing at 250C i.e. on room temperature ±20C. In reactive powder concrete there is a less cement use because of silica fume which was again by product of SiO2 i.e. silicon dioxide. This is resulting into less significant greenhouse effects to improve sustainable development goal. This paper gives sufficient idea about the wavelength and its characteristics. Uses of silica sand in study of RPC and structural changes occur in compression strength. In this paper linear relationship was establish with the help of regression analysis for compactness of material and studying the wavelength. The R2 value is ranges 0.8 to 0.99 means the relationship was good and material is homogeneous. Plasticizer and water cement ratio plays an important role in case of workability and cement binder ratio.