Optimisation and Partial Replacement of natural sand by Copper Slag with steel fibres as reinforcement
Author(s):
G.VIJAYA RAJU, M.RamaKrishna, D.Satyanarayana
Keywords:
Copper Slag, Fine Aggregate Replacement, Waste Plastic, Compressive Strength, Split Tensile Strength, Flexural Strength, Eco-friendly.
Abstract
Alternative to river sand, which is a common form of fine aggregate in preparation of concrete have been in demand due to large scale depletion of river bed and increasing cost of river sand. Many non-conventional resources such as Stone Dust, Carbonate Sand, Fly Ash, Copper Slag etc. with larger percentage of Silica (SiO2) have been tried out as an alternative to river sand as fine aggregate in preparation of concrete. Several studies have shown promising result in terms of strength properties of concrete by using copper slag as a partial replacement of river sand, along with fibrous material because Concrete is a brittle material when subjected to normal stresses and impact loads, where tensile strength is relatively low compared to compressive strength. This can be improved by addition of fibrous material. The geometric size and modulus of fibers are the main factors influence the mechanical performance of fiber reinforced concrete. The optimum percentage of replacement of cement by copper slag is 40% and the maximum Compressive Strength obtained is 40.85, 49.23 & 53.25 N/mm2 for 28 days,56 days & 90 days respectively .It is also observed that 40% replacement level and at 1% addition of steel fibers the maximum compressive strength obtained increases at 6.9% for 28-days,9.6% for 56 days and 6.45% for 90 days when compared with conventional concrete. The optimum split tensile strength of concrete mix is obtained at 40% replacement of fine aggregate with copper slag at 1% addition of steel fiber i.e., there is high percentage increase in strength of 37.5%, 48.73%, 45.18% for 28-days, 56-days and 90-days respectively. The maximum flexural strength of concrete mix is obtained at 40% replacement of fine aggregate with copper slag at 1% addition of steel fiber i.e., there is high percentage increase in strength of 54%, 51.70%,46.08% for 28-days, 56-days and 90-days respectively.
Article Details
Unique Paper ID: 144615

Publication Volume & Issue: Volume 4, Issue 1

Page(s): 195 - 203
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