International Journal of Excellence Innovation and Development ||Volume 2, Issue 1, Jan. 2019||Page No. 025-028||
Mechanical Characteristics of Eco-friendly Concrete Using GGBS and Manufactured Sand P. Karthigai Balan Assistant professor, Department of Civil Engineering, Saranathan College of Engineering, Tiruchirappalli, Tamilnadu, India
Abstract––This paper describes the properties of concrete with partially replacing the M-Sand for fine aggregate and GGBS for Cement. M25 grade of concrete was used for this project. M sand was partially replaced about 0%, 25%, 30%, 35%, 40% and 50%% in the weight of fine aggregate. GGBS was partially replaced constantly about 10% in the weight of cement. The compressive strength and flexural strength of the concretes were tested and compared with the strength of the conventional concrete at the curing ages of 7, 14 and 28 days of curing. Test results show that the maximum strength was attained at 40% replacement of M sand. So the optimum replacement of M sand is 40% in the weight of fine aggregate. Further increase in the percentage of M sand reduces the strength of concrete than the conventional concrete. Keywords––Eco-friendly concrete, GGBS, M-sand, Strength
INTRODUCTION Concrete is prepared by mixing various constituents like cement, aggregate, water, etc. Which are economically available. Concrete is a composite material composed of granular like coarse aggregate embossed in a matrix and bound together with cement or binder which fills the space between the particles and glues them together. Almost three quarters of the concrete is composed of concrete. To meet the global demand of concrete in future, it is becoming a more challenging task to find suitable alternate to natural aggregate for preparing concrete. Therefore in India the use of alternate sources for natural aggregate is becoming increasingly important. GGBS is a co product of iron making industry. The use of blast furnace slag aggregate in concrete by replacing natural aggregate is most promising concept because its impact strength is more than the natural aggregate. Steel slag aggregate are already being used as aggregate in asphalt paving road mixes due to their mechanical strength. The cheapest and easiest alternate to natural sand is manufactured sand by crushing rocks or stones in desire sizes and trade by suitable methods. Sand produced by such means is known as manufactured/crusher/artificial sand.
LITERATURE REVIEW Nimitha Vijayaragavan and A S Wayal The cheapest and easiest alternative to natural sand is manufactured sand produced by such a means is known as manufactured crusher or artificial sand. The paper presents the result of experimental investigation of www.ijeid.com
partial and full replacement natural sand by manufactured sand. The main aim of the paper is to compare the compressive strength and workability of concrete with manufactured sand and natural sand in various proportions. M. Adams Joe, A. Maria Rajesh, P. Brightson, M. Premanand The natural river sand was the cheapest resource of sand. Compared to the river sand M-sand have a better quality with more bonding strength. From the experiments results it is concluded that the M-sand can be used as a replacement for fine aggregate. It is found that 50% replacement of fine aggregate by M-sand give maximum result in strength and durability aspects than the conventional concrete. K.G. Hiraskar and Chetan Patil Blast furnace slag is a by product and using it as aggregate in concrete will might prove an economical and eco friendly solution in local region. The demand for aggregate is increasing rapidly and so as the demand of concrete. The results shows that it has properties similar to natural aggregates and it would not cause any harm if incorporated into concrete. There is no negative effects.
EXPERIMENTAL INVESTIGATION Cement Cement is the most important constituent of concrete, it forms the binding, medium for the discrete ingredients made out of naturally occurring raw materials and sometimes blended or inter ground with industrial wastes. Cement comes in various type and chemical compaction. For our project we have used OPC 53 grade.
Sl. No 1 2 3 4
Table 1: Physical properties of cement Property Values Standard Obtained Value Initial setting time (min) 48 >30 Final setting time(min) 240 <600 Fineness 3.5 <10 Specific gravity 3.07 -
Fine aggregate Locally available river sand having bulk density of 1.71 kg/m3. Specific gravity of 2.65 and fineness of 5.24.
MANUFACTURED SAND M-sand used as partial &full replacement for river sand having bulk density of 1.75 kg/m3. Specific gravity of 2.73 and fineness of 5.24.
{IJEID © 2019} All Rights Reserved
Page | 25