International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 02 | Feb -2017
p-ISSN: 2395-0072
www.irjet.net
Strength and geotechnical characterization of copper slag as partial replacement of fine aggregate Charumol.S1 1PG
Student, Dept. of civil Engineering, Coimbatore institute of technology, Tamilnadu, India
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Abstract - Copper slag is a obtained as a by-product during
environment. Silica sand which represents the most popular blasting medium and concrete fine currently in use poses serious health risks when inhaled. It may also contribute to pollution and other environmental concerns. Copper slag has high strength to weight ratio, making it an effective option in concrete or as a fill material under the roadway.
the smelting and refining process. While drawing metal out of copper ore refineries produce a large volume of non-metallic dust, soot and rock. Collectively these materials makes up slag, which can be used for a surprising number of applications in the building and industrial fields. By the addition of slag, selfweight of the concrete is increased thereby density is increased. Experimental program has done to investigate the effect of using copper slag as a partial replacement of fine aggregate. For this work M20 grade concrete was used and test were conducted for various proportions with sand of 0%, 20%, 40%, & 60% in concrete. The results of compression and split tensile strength test indicated that the strength of concrete increases with respect to the percentage of slag added by weight of fine aggregate up to 40% of addition. The recommended percentage replacement of sand by copper slag is 40%. The compressive strength decreases slightly for above 40% addition of slag. However compared to ordinary sand as fine aggregate the compressive strength value is still greater. From the permeability test conducted it has been observed that the value of permeability is less when compared with that of sand.
Table -1 : Sieve analysis results of fine aggregate, coarse aggregate and copper slag
Key Words:
Copper slag, Chemical composition, Compressive strength, Split tensile strength, Permeability etc.
1. INTRODUCTION Copper slag is an abrasive blasting grid made of granulated slag from metal smelting process also called as iron silicate. While drawing metal out of copper ore refineries produce a large volume of non-metallic dust, soot and rock. Collectively these materials makes up slag, which can be used for a surprising number of applications in the building and industrial fields. Copper slag has gained popularity in the building industry for use as a fill material. Due to its high strength /weight ratio copper slag can be used as a best alternative to sand. Unlike many other fill materials, copper slag poses relatively little threat to the environment. This means it can be used to build up the earth to support road, buildings or other surfaces. The slag serves as a fine or binding agent which helps hold the larger gravel particles within the concrete together. When used in this manner the slag helps to improve the properties of concrete and also serves as a form of recycling. One of the primary advantage of copper slag is the low risk it poses to health and the
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Coarse aggregate Cumulative %retained
Fine aggregate Cumulative %retained
Copper slag Cumulative %retained
20.00
0.7
0
0
16.00
4.15
0
0
12.50
15.85
0
0
10.00
48.75
0
0
4.75
97.25
1.17
0.20
2.36
100
5.68
4.75
1.18
100
28.14
50.65
.600
100
57.07
88.25
.300
100
95.39
96.15
.150
100
98.68
98.00
Fineness modulus
5.32
2.87
3.38
IS sieve
Table -2 : Physical properties SL NO
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PROPERTIES
ANALYSIS
1
Hardness, Mohr’s circle
2
Specific gravity
3
Electric conductivity
4.8ms/m
4
Chloride content
<0.0002
5
Particle size
0.2 mm up to 3 mm
6
Granular size
Angular, sharp edges, multi-faced
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