International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 04 | Apr -2017
p-ISSN: 2395-0072
www.irjet.net
Strength characteristics of different types of manufactured sand in cement mortar Manu A S1, Swapnagowda R2 1Assistant 2Post
Professor, Civil Engg, BNM Institute of Technology, Bangalore, India.
graduation student, Civil Engg, UVCE college of Engineering, Bangalore, India.
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Abstract:This paper reports the results of experimental
sulphides form matte phase due to low tendency to form the anion complexes. Silica is added directly for the most complete isolation of copper in the matte which occurs at near saturation concentration with SiO2. The slag structure is stabilized with the addition of lime and alumina. The molten slag is discharged from the furnace at 1000–1300° C. When liquid slag is cooled slowly, it forms a dense, hard crystalline product, while as quick solidification by pouring molten slag into water gives granulated amorphous slag. Crushed Granite Sand (CGS) is manufactured by crushing stone making use of the cone crusher. Due to the use of this technology the sand particles can be shaped similar to that of the naturally available fine aggregate.
studies on the use of different types of manufactured sand in cement mortar. Copper Slag (CS) is a by-product obtained during the matte smelting and refining of copper and Crushed Granite Sand (CGS) obtained from vertical cone crusher are considered. CS and CGS as a sand substitute in cement mortar is considered for present work. In this present work, cement mortar mix 1:3 and the replacement of Natural Sand (NS) by CS and CGS at various percentages is considered at a constant water cement ratio of 0.5. The strength characteristics of different types of manufactured sand are studied. The manufactured sand exhibited better strength due to good bond characterises. From this study, it is observed that the manufactured sand is a good alternative for the natural river sand in mortar, In spite of this, manufactured sand is quite economical. In addition, workability and durability studies are necessary for making concrete conclusions.
Significant research work has been reported in the field making of cement mortar or concrete using industrial by products as ingredients. Meenakshi and Ilangovan [1] investigated that the replacement of natural sand by copper slag(CS) and ferrous slag(FS) yielded higher compressive strength of concrete compared to that of the reference mix. Also, they concluded that at higher levels of replacements (100%) there was a slight bleeding tendency and it is recommended that up to 80% of CS and FS can be used as replacement of sand. The studies show that total replacement of sand by CS and FS is not advisable. Khalifa et al. [2] conducted experimental work by using copper slag as fine aggregate in cement mortar and concrete. From the results, they concluded that copper slag can be used as alternative for natural sand. Mahzuz et al [3] investigated that the use of stone powder in concrete and mortar as an alternative for natural sand and they concluded that use of sand stone instead of NS in concrete increases the compressive strength by 15%. Kanmalai et al [4] conducted an experimental work on mechanical properties of high performance concrete incorporating granite powder as fine aggregate and they concluded that granite powder can be utilised partially as a fine aggregate in cement mortar for making high performance concrete.
Key words: Copper Slag (CS), Crushed Granite Sand (CGS), Compressive strength.
1. INTRODUCTION Copper slag is a by-product obtained during the matte smelting and refining of copper. Major constituents of a smelting charge are sulphides and oxides of iron and copper. The charge also contains oxides such as SiO2, Al2O3, CaO and MgO, which are either present in the original concentrate or added as flux. It is iron, copper, sulphur, oxygen and their oxides which largely control the chemistry and the physical constitution of the smelting system. A further important factor is, the oxidation/reduction potential of the gases which are used to heat and melt the charge. As a result of this process, copper-rich matte (sulphides) and copper slag (oxides) are formed as two separate liquid phases. The addition of silica during smelting process forms strongly bonded silicate anions by combining with the oxides. This reaction produces copper slag phase, whereas
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