EXPERIMENTAL STUDY ON PRODUCTION OF HIGH PERFORMANCE CONCRETE BY USING QUARRY DUST AS FINE AGGREGATE AND RECYLED AGGREGATE AS COARSE AGGREGATE

Abstract

Concrete is the most widely used construction material all over the world in view of its strength, high mould ability, and structural stability. Aggregate is an essential concrete material that takes up 65%-80% of concert’s volume. Natural aggregate (NA) and River sand (RS) are essential ingredients in the making of the concrete and are used extensively in its preparation. Exploring new sources of aggregate was initiated by the rise in plea and lessening in supply of aggregate for the making of concrete. There is now special need to search new substitute materials to use instead of RS in order to prevent extreme river erosion due to lessening in the sources of natural sand. Demolition and construction waste (CDW) are dumped in landfills in developing nations, creating environmental, social, and economic crisis. Consequently, in order to preserve natural resources, reduce the quantity of demolition waste that needs to be landfilled, stop excessive river erosion, and produce new hybrid polymers (HPC), quarry dust (QD) and recycled aggregates (RA) can be utilized in place of RS and NA in the production of concrete. Therefore, this study focused on RA and QD and their feasibility in the production of HPC. Mix design procedure has been created for M50 grade concrete with usage of super plasticizer. The study examined, the physical properties of QD and RA, slump of fresh concrete, mechanical property and durability of HPC, and microstructural analysis of hardened concrete. The compressive strength of concrete for PB2 (5% RA and 5% QD), PB3 (5%RA and 10%QD), PB4 (5%RA and 15% QD), PB5 (5% RA and 20% QD) and PB9 (15% RA and 20%QD) showed slight improvement on the 28th day. Also tensile and flexural strength tests showed the same improvements at 28 days. The water absorption and sulfate attack have significant improvement for combined replacement of QD up to 20% and RA up to10%. Microstructural tests including X-ray diffraction (XRD) and Scanning Electron microscopy (SEM) analysis shows improved performance for replacement of QD 20% and RA up to 10%. Therefore, the optimum amount of replacement is 20% QD and 10% RA, which gives comparable properties to the control mix.