International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 04 Issue: 07 | July -2017
p-ISSN: 2395-0072
www.irjet.net
Experimental Investigation on Self Compacting Concrete by Introducing Fly Ash with Varied Size of Aggregate Vishnukanth1, Ravi Tilaganji2 1M.Tech
Student, construction Technology, Department of Civil Engineering, Jain College of Engineering Belagavi, Karnataka, India 2Assistant Professor, Department of Civil Engineering, Jain College of Engineering, Belagavi, Karnataka, India ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - Self-compacting concrete is a most preferred
type of concrete, due to its complete flow ability without using vibrating tools. It is easily feasible for any shape and size of the formwork. Self-compacting concrete is one of the green technics for avoiding sound effect on construction site. The fly ash will be very helpful to reduction of natural resources for manufacturing cement and also very little effect in production of carbon emission gases. The mix design is made according to IS 10262:2009. In this study, 10mm coarse aggregate is replaced by 20mm at a percentages of 10%, 20%, 30%, 40%, 50% and cement by 30% of Fly ash. The rodded density and voids ratio of 20mm with 10mm coarse aggregate are obtained. The aggregate mix ratio has been kept with 60% of coarse aggregate and 40% of fine aggregate. The fresh state properties are conducted for Inverted slump flow test, Inverted T50cm slump flow test, Vfunnel test, V-funnel at T5 minutes, L-box test and Orimet test, all the tests results are acceptable up to 50% of 10mm coarse aggregate replacement by 20mm Coarse aggregate, except for the V-funnel at T5 minutes test at 0% CASCC and Orimet test at 50%CASCC. The hardened state properties tests are conducted after curing of 7days, 14days, and 28days. The results obtained in the hardened state for Compressive strength and Split tensile strength at 30% replacement of 10mm coarse aggregates by 20mm are giving optimum results. Key Words: SCC (Self Compacting Concrete), Compressive Strength, Split Tensile Strength, Cement, Fly Ash, CA (Coarse Aggregate).
1. INTRODUCTION 1.1 General: There is a rapid development in concrete technology in the past three to four decades due to enhancement in its strength and durability as well as various other properties which were developed earlier as use of steel reinforcement, reinforced cement concrete, and pre-stressed concrete. A concrete which totally gets compacted by itself covering the required size and shape of elements is defined as Self Compacting concrete. Self-Compacting concrete was first Š 2017, IRJET
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discovered in early 1980’s in Japan and since, then it was adopted all over the world as it is having high time efficient process, requires less labours, consumes less energy and gives a smooth finishing surface. In India Self-compacting concrete is not utilized much, as people are not aware about it and also its reimbursements. Once people get attentive about its replacement for a conventional concrete, it may be used at high pace in coming years for projects under taken by National and International construction companies. The construction industries are slowing down with the use of conventional concrete in recent years and have switched for construction of green buildings, so as to make efficient usefulness of naturally available materials and other resources which are energy efficient, sustainable, improve performance of the building reducing impact on the environment. Fly ash is the byproduct of coal combustion which is used as replacement of cement as sustainable or green product. India is more relied on non-renewable energy like thermal energy, which largely uses coal for producing electricity. The fly ash obtained as byproduct is taken to larger area for disposal purpose which pollutes air, water can be utilized as green material which gives an added strength and properties to the concrete structures.
1.2 Self Compacting Concrete: This concrete is a most preferred type of a concrete, due to its complete flow ability without using vibrating tools. It is easily feasible for any shape and size of the formwork, thus concrete is infilled with a very congested narrow space reinforcement with penetrated due to its self-compacting nature. Hence, homogeneity is achieved without segregation and bleeding which prevents honeycombing in the future.It reduces noise level as we deny the use of vibrating tools during the construction work, the better working environment. SCC has a greater advantage over the other type of concrete because it provides minimum percentage of voids and also provides smooth surfaces, greater workability and reduces the labors. SCC provides ease in providing and dismantling of the formworks. It easily feasible with different size of coarse aggregates and without effecting the flowing ability, provides the design flexibility to the designer with the help of guidelines. Superior quality control, durability is achieved and also construction speed. ISO 9001:2008 Certified Journal
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