International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 03 | Mar -2017
p-ISSN: 2395-0072
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EXPERIMENTAL STUDY ON SELF- CURING CONCRETE K.Nithya1, K.Ranjitha2, P.Kumar3 1, 2 PG
Student, Department of Civil Engineering, PSR Engineering College, Sivakasi, Tamilnadu, India Professor, Department of Civil Engineering, PSR Engineering College, Sivakasi, Tamilnadu, India ---------------------------------------------------------------------***--------------------------------------------------------------------3 Assistant
Abstract - Today concrete is most extensively used construction material due to its good compressive strength and durability. It is expected that the present consumption of concrete in the world is of the order of 10 billion tones every year. The strength and durability of concrete will be fully industrial only if it is cured. Due to the curing of concrete large amount of water is required. To overcome the high consumption of water it is neededto study self-curing concrete. Self-curing is also referred as Internal- Curing. Self-curing concrete is one of the particular concretes in extenuating insufficient curing due to human disregard and also due to scarcity of water in arid areas, inaccessibility of structures in hard terrains and in areas where the presence of fluorides in water will badly affect the characteristics of concrete. The current study involves the use of shrinkage reducing admixtures in concrete which helps in self-curing and helps in better hydration and hence strength. Key Words: Self-Curing concrete, Shrinkage Reducing Admixtures, Hydration, Mechanical properties.
1. INTRODUCTION Self-curing or domestic curing is a technique that can be used to supply additional moisture in concrete for added effective hydration of cement and reduced self-desiccation. It was found that water soluble alcohols can be used as selfcuring agent in concrete. The use of self-curing admixtures is very important from the point of vision that water resources are receiving valuable every day. New developments in curing of concrete are on the prospect as well. In the next century, mechanization of the placement, preservation, and removal of curing mats and covers will advance as performance-based provision compute curing for receiving and payment. In addition, effective sealants and compounds that prevent the loss of water and promote moist curing conditions will be in high demand. Self-curing concrete should become existing in the not-too-distant future. Self-curing concrete is provide to absorb water from wetness from air to realize well hydration of strengthen in concrete. It solve the problem when the quantity of cement hydration is lower due to no curing or inappropriate curing by using a self-curing agent like poly-acrylic acid which has strong ability of fascinating moisture from the thought and providing water essential for curing concrete. M.V.Jagannadha Kumar et al, studied that the optimum dosage of PEG400 for maximum strengths (compressive, tensile and modulus of rupture) was create to be 1% for M20
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and 0.5% for M40 grades of concrete. As proportion of PEG400 enhanced slump increased for both M20 and M40 grades of concrete. Strength of self- curing concrete is on par with conventional concrete. Self-curing concrete is response to many problems faced due to lack of proper curing. A. Aielstein Rozario et al, said that the permeability of concrete decreases with an increase in the replacement of fly ash with cement and in addition of P.E.G dosage. So the penetration of chemicals is decreased with the adding up of PEG and the concrete is safe beside sulphates. The proportion of weight loss of the concrete specimens is also decrease for every grade of concrete. From the results, we know that the selfcuring concrete has the capability to resist the sulphates at hand in the soils and in the sea waters. It can be economical, so it can be adoptable for construction. Stella Evangeline et al, have investigated the Strength Variations in Concrete by Using super absorbent polymer and polyvinyl alcohol as shrinkage reducing admixtures. Polyvinyl alcohol is added in various proportions are 0.03%, 0.06%, 0.12%, 0.24%, 0.48%. It was establish the compressive strength, flexural strength, tensile strength. The maximum compressive strength, flexural strength and tensile strength is establish respectively 33.7 N/mm2, 8.0 N/mm2,4.945N/mm2 for 28 days. This paper presents the results of compressive and flexural strength on concrete containing pond ash as partial replacement of cement and then addition of super absorbent polymer and polyvinyl alcohol. For this work, M30 grade concrete was used and the tests were conducted for various proportions of pond ash of 0-30%. And adding S.A.P of 00.6% and PVA of 0-0.50% in concrete. The results obtained were compared with conventional concrete.
Objectives of the Study: The objective of this study is to experimentally investigate the mechanical properties of self-curing concrete with the addition of shrinkage reducing admixtures. To reduce water quantity in curing periods. To increase the compressive strength of concrete in self-curing method. The scope of the paper is to study the effect of Polyvinyl alcohol on strength characteristics of Self-curing concrete. The Compressive and tensile strength of self-curing Concrete for 7 and 28 days is found out and compared with conventional concrete of similar mix design.
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