International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 11 | Nov 2024
p-ISSN: 2395-0072
www.irjet.net
Experimental Examination of Self-curing Concrete Combined with Polyethylene glycol-400 as a Self-curing agent Mayank Singh1, Bhoj Ram Sahu2 1Mtech Scholar, Department of Civil Engineering, Bharti Vishwavidyalaya Durg (Chhattisgarh), 2Assistant Professor, Department of Civil Engineering, Bharti Vishwavidyalaya Durg (Chhattisgarh
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Abstract - Concrete, the world's second most used
capacity. Self-curing compounds can be created from watersoluble polymers, unlike conventional concrete, which requires external curing for strength. The polymers establish hydrogen bonds with water molecules, lowering their chemical potential and vapor pressure, so slowing evaporation from the surface. Proper hydration is critical for meeting durability requirements in cement concrete projects.
building material, is known for its great compressive, tensile, and flexural strength. Self-curing concrete is an alternative to immersion that avoids water limitations. This study investigates the effects of adding polyethylene glycol-400 to an M-30 grade concrete mix during internal curing. This approach is utilized when outdoor curing is not an option, such as in places with restricted water supply or human access. Self-curing is critical for developing concrete's pore structure and microstructure, whereas water curing is required to prevent unwanted qualities. The study's goal is to discover the best amount of polyethylene glycol-400 as a 0%, 0.5%, 1%, and 1.5% for self-curing, resulting in highquality curing.
1.3 Process and Mechanism of self-curing or internal curing: The process of releasing water from an exposed surface due to the presence of hydrogen and oxygen is known as self-curing or internal curing. This method slows the chemical reaction and reduces the pace of concrete evaporation. The oxygen in the atmosphere combines with the hydrogen to make water. Moisture evaporates from an exposed surface due to chemical changes, resulting in cement hydration and shrinkage. This leaves empty holes and reduces relative humidity, allowing the cement paste to self-desiccate and form microcracks and capillary pores. Selfcuring inhibits self-desiccation while maintaining relative humidity. Maintaining the moisture content is critical because cement hydration becomes ineffective when relative humidity goes below 80%.
Keywords: Slump cone test, PEG-400 self-curing agent, compares the compressive, tensile, and flexural strength selfcuring concrete, regular concrete.
1. INTRODUCTION Concrete constructions require adequate curing to meet performance and durability standards. Conventional curing requires exterior curing after mixing, putting, and finishing, whereas self-curing or internal curing adds moisture for effective cement hydration. Concrete is the most extensively used building material due to its low cost, strength, and durability. It is suitable for bridges, highways, and infrastructure. Concrete's versatility and strength make it ideal for a variety of construction applications. New admixtures can increase the workability and strength of concrete.
2.0 LITRATURE REVIEW:
1.1 Curing: the process of controlling moisture transfer from concrete during cement hydration. It can be done during the production process or after the concrete has been laid. Curing time is critical for concrete strength and durability since it takes days or weeks to hydrate. Temperature management is also important in curing because it affects the cement's hydration rate. The basic purpose of curing is to keep the moisture content of the concrete constant while reinforcing it.
1.2 Self-curing and its necessity: Self-curing is a way of increasing concrete's water capacity while decreasing water loss as compared to normal concrete. PEG-400 is utilized to do this since it minimizes water loss while increasing water
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Singh G et al. (2021) discovered that increasing the dose of the self-curing chemical PEG-400 increases the workability and performance of M30 grade concrete, resulting in greater compressive, split tensile, and flexural strengths. Azhagarsamy and Sundaraman's 2016 study on the strength and durability of M20 grade concrete using water-soluble polyethylene glycol (PEG 400) as a self-curing agent discovered that self-curing concrete had an average increase of 12.73% in compressive strength and 13.31% in split tensile strength, indicating superior performance over conventional concrete. Tyagi's 2015 study looked at the usage of PEG-400 in concrete at various quantities (0.5-2%). The study examined M25 and M40 grades of OPC cement in accordance with IS 12269-1987. The optimum values for M40 grade were 0.5% and 1% for M25 grade PEG-400, enhancing concrete strength and durability.
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