e-ISSN: 2582-5208 International Research Journal of Modernization in Engineering Technology and Science Volume:03/Issue:02/February-2021
Impact Factor- 5.354
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EXPLORATORY STUDY OF CONCRETE MIXED WITH SUPER ABSORBENT POLYMER Ishanya Joshi*1, Ankit Dane*2, Anshul Pandey*3 *123Assistant
Professor, Civil Engineering Department, Indore Institute of Science & Technology, India.
ABSTRACT Curing of concrete is necessary to maintain adequate moisture content in concrete during its early stages to develop the ideal properties. However, curing is not always achievable and often ignored many times. Therefore, the need to develop self-curing agents attracted several researchers. The addition of superabsorbent polymer in concrete has presented to have many positive effects on the properties of concrete in its both fresh and hardened properties. The main role of SAP is that it can contribute water to concrete by providing an an internal water source. This inner water source acts as an inner curing agent after the final setting of concrete. At the same time the SAP releases water at reasonably slower rate at the fresh concrete stage. The study focuses on the use of an optimum amount of Sodium Polyacrylate as a superabsorbent polymer (SAP) in PPC based cement concrete. It was observed that compressive strength of M15 grade concrete was significantly higher than M20 grade concrete, and best result was obtained at 0.5% SAP. Keywords: Self Curing Agent, Concrete Grade, SAP, Compressive Strength.
I. INTRODUCTION Curing means maintaining the proper moisture conditions to promote ideal hydration of cement just after placing. Practically complete curing is not at all achievable many times because of non-availability of good quality water and also due to practical difficulties. Many researches are concerned to identify effective selfcuring agent. Therefore, many researchers are attracted towards recognize the self-curing delegate such as polyvinyl alcohol, polyvinyl acetate etc. This agent which decreases the stress at the surface of water and also minimizes vaporation of water from concrete paste thus it will improve capability of water to retain on concrete. Therefore it was found that sap may be used as self-curing delegate to the concrete. In the new millennium, concrete incorporating self-curing agent in conventional cement concrete paste and attempt was done to optimize the content of sap for desirable results in form of consistency, workability and strength in compression. Hence an effort was made to use sap as a self-curing delegate. OBJECTIVE OF STUDY 1) Analysis of various effect of sap as additive in concrete. 2) Investigation on the optimal dosage of sap for different water to binder ratio. 3) Effect of super absorbent polymer in wet and harden properties of internal self-curing concrete. 4) To know about progression of heat at various stages of hydration process by using temperature sensors. 5) Study on microstructure in cement- concrete with the use scanning electron microscopic images for different dosages of sap. 6) To detect the porosity of self-cured concrete by conducting test of water absorption.
II. SELF CURING AGENT Superabsorbent polymers (also known as SAP) is an odourless, grainy white powder having the capability to suck and keep hold of extremely huge quantity of a liquid relative to their own weight. They also have a high molecular mass, cross-linked polyelectrolyte that can soak up more than 300 times the mass of water or any other liquid. These superabsorbent polymers are widely used as a liquid absorbent in disposable hygiene products, such as baby diapers, female hygiene products, and other medicinal products. In previous years, cellulosic or fiber-based products were used as water absorbing materials. For this, the options were cotton, sponge, tissue paper. However the water absorbent capability of materials is only up to 11 times their weight, the majority of which is lost under modest pressure. www.irjmets.com
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