International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 11 Issue: 06 | Jun 2024
www.irjet.net
p-ISSN: 2395-0072
Use of PEG-400 as a Self-Curing Agent For M-30 Grade of Concrete. Abhijeet Yadav1, Mr. Jonty Choudhary2, Mr. Pravek Sahu3 1Research Scholor, M. Tech. (Structural Engg.) 2Assistant Professor, Department of Civil Engineering, 3Assistant Professor, Department of Civil Engineering,
Jhada Sirha Government Engineering College, Jagdalpur Chhattisgarh ---------------------------------------------------------------------***-------------------------------------------------------------------Abstract - Concrete is the most utilized building material 1.2 Self-curing: worldwide, after water. It is well-known for having strong compressive and tensile properties. Concrete curing contributes to its durability; therefore, in order to prevent water shortages, we propose the idea of self-curing concrete as an alternative to immersion. This study aims to determine the impact of adding polyethylene glycol-400 as an additive to concrete with a weight percentage of 1% for M30 grade concrete mix. We choose internal curing where external curing is not possible, such as in places with limited water supplies or when human access is restricted. A significant factor in the development of the concrete's microstructure and pore structure is internal curing, often known as self-curing.
Concrete can be internally cured, also known as selfcuring, to introduce more moisture for improved cement hydration and decreased self-desiccation. With the use of PEG-400, concrete's water loss is reduced and its water capacity is increased as compared to regular concrete. Because the concrete is mixed and placed correctly, typical concrete gains its strength through external curing. In order for concrete construction to have adequate strength and longevity, curing is necessary. 1.3 Mechanism of Internal Curing Concrete: Because of the disparity in chemical potentials, moisture evaporation from an exposed surface occurs continuously. When cement hydrates, chemical shrinkage takes place, resulting in the creation of empty holes and a drop in relative humidity. This causes the cement paste to selfdesiccate and lose its moisture content, which results in the formation of microcracks and capillary pores, the weak areas in the matrix.
Key Words: conventional concrete, Self-curing concrete Self-Curing agent PEG-400, Compressive strength, Tensile strength.
1.INTRODUCTION Concrete is the most common building material due to its strength and durability, making it a low-cost option. It may be bent and sized to form highways, bridges, and other infrastructure. Concrete is extremely durable, tough, and hard. The most versatile material is suitable for any form of building project. The bulk of civil engineering structures use concrete as their primary engineering material. Its low cost, high durability, and convenience of on-site fabrication contribute to its popularity as a basic building material in construction. Concrete, like other engineering materials, must be developed for strength, durability, and workability. introduction of new generation admixtures. Higher grades of concrete with good workability are achievable.
In order to prevent self-desiccation and preserve relative humidity, self-curing is employed. free energy that exists between the liquid and vapor phases. The content and characteristics of the self-curing agents, such as water absorption, pore structure, grain size distribution, and mechanical properties, are closely linked to the performance of the self-curing concrete system. Significant autogenous deformation and (early-age) cracking may occur when this water is not easily accessible. Empty pores are produced in the cement paste as a result of the chemical shrinkage that takes place during cement hydration. This shrinkage and reduction in internal relative humidity may result in early-age cracking.
1.1 Curing:
Initially, self-curing was suggested as a way to deal with the self-desiccation of the concrete. The mechanism by which tiny inclusions scattered throughout concrete retain water during mixing and up to setting time then release it after cement hydration is known as self-curing. Maintaining the moisture content of concrete is essential because cement hydration loses effectiveness when relative humidity falls below 80%. Insufficient water availability during concrete curing can
Curing is primarily intended to maintain the moisture content of the concrete by avoiding its loss of moisture while it is strengthening. Controlling the pace and amount of moisture movement in concrete during cement hydration is known as curing.
© 2024, IRJET
|
Impact Factor value: 8.226
|
ISO 9001:2008 Certified Journal
|
Page 480