International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 05 | May -2017
p-ISSN: 2395-0072
www.irjet.net
Comparative Study on Strength Parameters of Concrete on Addition of Saw Dust Ash and Polypropylene Fibres Gibi Miriyam Mathew1, Anju. V2 1P.G.
Student, Department of Civil Engineering, Sree Narayana Institute of Technology, Adoor, Kerala, India Professor, Department of Civil Engineering, Sree Narayana Institute of Technology, Adoor, Kerala, India
2Assistant
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Abstract – Rapid increase in construction activities has resulted in shortage of conventional construction materials. The production of portland cement is not only costly and energy intensive, but it also produces large amounts of carbon emissions. The production of one ton of portland cement produces approximately one ton of CO2 in the atmosphere. In today’s situation concrete needs special combinations of performance and uniformity requirements that cannot be always achieved by using conventional constituents and normal mixing. Concrete is weak in tension, has limited ductility and little resistance to cracking. This has necessitated research into alternative materials of construction. The effective housing techniques deal with reduction in cost of construction as well as providing strength to buildings. This provided the motivation for exploring the benefits of saw dust ash (SDA) as a replacement material and the addition of polypropylene fibres. Sawdust is one of the major underutilized by-products from saw milling operations. The implementation of waste sawdust can not only decrease environmental damage, but also can save the concrete materials. Saw dust ash can be used as a light weight concrete that has already received attention over the past years. To strengthen the SDA concrete and making it more durable polypropylene fibre is being added. Polypropylene is a synthetic hydrocarbon polymer, the fiber of which is made using extrusion processes by hot drawing the material through a die. In this project cement has been partially replaced with SDA by its weight such as 2.5%, 5%, 7.5%, 10% and 12.5% in M25 grade concrete along with polypropylene fibres. Results showed that maximum increase in the compressive strength observed was 7.5% and split tensile strength observed was 10% with the replacement of SDA along with 1.2% of polypropylene fibres. Key Words: Saw dust ash (SDA), Polypropylene fibres, Light weight concrete, Hydrocarbon polymer, Workability, Compressive strength, Tensile strength.
1. INTRODUCTION The rapid development of construction industry has increased the consumption of cement. But the production of cement involves the depletion of natural resources and greenhouse-gas emissions. Also production cost of cement is increasing day by day. Thus, there is a need to search for alternative materials to cement for use in the construction. Concrete is the most popular building material in the world. © 2017, IRJET
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Concrete is known to be the most wide spread structural material due to its quality to shape up in various geometrical configurations. It is an assemblage of cement, fine and coarse aggregates and water. Over 300 million tones of industrial wastes are being produced per annum by various industrial and agricultural processes. These materials possess problems of disposal, health hazards and aesthetic problems. The rapid development of construction industry has increased the consumption of cement. But the production of cement involves the depletion of natural resources and greenhouse-gas emissions. Also production cost of cement is increasing day by day. Thus, there is a need to search for alternative materials to cement for use in the construction. The advances in concrete technology have paved way to make the best use of the locally available materials by judicious mix proportioning and proper workmanship, so as to result in a concrete satisfying the performance requirements. Cement industry contributes extensively in the emission of CO2. It also consumes high levels of energy resources in cement production. By replacing cement with a waste material, such as saw dust, the cement and cement industry together can meet the demand in construction industry and also can help in reducing the environmental pollution. Saw dust is very common due to the availability of saw mills in almost every township in the country. It is one of the major underutilized by-products from saw milling operations. Saw dust ash (SDA) can be used as a constituent of light weight concrete. This idea has already received attention over the past years. The utilization of waste saw dust can not only decrease environmental damage, but also can save the concrete materials. Concrete made with Portland cement has certain characteristics: it is relatively strong in· compression but weak in tension and tends to be brittle. These two weaknesses have limited its use. Another fundamental weakness of concrete is that cracks start to form as soon as concrete is placed and before it has properly hardened. These cracks are major cause of weakness in concrete particularly in large onsite applications leading to subsequent fracture and failure and general lack of durability. The weakness in tension can be overcome by the use of conventional rod reinforcement and to some extent by the inclusion of a sufficient volume of certain fibers. To
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