Evaluation of Dynamic Elastic Modulus of Roller Compacted Concrete Containing GGBS and M-Sand

Vol. 6  Issue 1
Year: 2016
Issue: Dec-Feb
Title: Evaluation of Dynamic Elastic Modulus of Roller Compacted Concrete Containing GGBS and M-Sand
Author Name: S. Krishna Rao, P. Sravana and T. Chandrasekhar Rao
Synopsis:

Use of industrial by-products such as Ground Granulated Blast furnace Slag (GGBS) as one of the raw materials in Roller Compacted Concrete Pavement (RCCP) is appropriate to deal with the sustainability of concrete and industrial growth. The present experimental investigation assesses the potential of GGBS in roller compacted concrete for pavement applications. The fine aggregate used in the investigation was Manufactured sand (M-sand) in place of natural river sand. The Ultrasonic Pulse Velocities (UPV) was determined at various ages varying from 1 day to 90 days of curing. The GGBS is used as partial replacement of Cement at the range varying from 10% to 60% by weight. The UPV of GGBS Roller Compacted Concrete Pavement (GRCCP) was lower for all mixtures at 1 day when compared to control mix concrete. However as the age of concrete increases the Ultrasonic pulse velocities were appreciably improved for all the mixes. Empirical relationships between strength, UPV and Dynamic Elastic Modulus were proposed. A new model is proposed to determine the Dynamic Elastic Modulus of GRCC.