The concrete dilution process assumes a remarkable role in the construction of solid microstructure and pore structure. The idea of self-comfort is to reduce the water dissipation of the concrete and thus increase the water holding limit of the solid compared to normal cement. An unwise restoration can reduce the quality of the cement without too much stretching. It was found that the water soluble polymers used as additives in solid effects, the dilution quality characteristics of hard cement take a prominent role in the construction of a compact solid structure and thus improve its rigidity and workmanship. The quality of compression does not decrease with the use of SAP in self-healing concretes. The excision flexibility with SAP is not reduced in self-curing concrete. SAP can be used up to 0.6% of the bond weight without changing the different quality of the cement

CHANDRA SEKHAR REDDY, N

SRUJANA, P.

English

International Journal of Innovative Technology and Research (IJITR)

N Chandra Sekhar Reddy* et al.  (IJITR) INTERNATIONAL JOURNAL OF INNOVATIVE TECHNOLOGY AND RESEARCH Volume No.8, Issue No.6, October – November 2020, 9726-9728.  2320 –5547 @ 2013-2020 http://www.ijitr.com All rights Reserved. Page | 9726 Study On Strength And Stress Strain Behaviour Of Self Curing Concrete  N CHANDRA SEKHAR REDDY M.Tech Student, Dept of Civil, Priyadarshini Institute of Technology and Management, Pulladigunta, Guntur, A.P, India P.SRUJANA Assistant Professor, Dept of Civil, Priyadarshini Institute of Technology and Management, Pulladigunta, Guntur, A.P, India Abstract: The concrete dilution process assumes a remarkable role in the construction of solid microstructure and pore structure. The idea of self-comfort is to reduce the water dissipation of the concrete and thus increase the water holding limit of the solid compared to normal cement. An unwise restoration can reduce the quality of the cement without too much stretching. It was found that the water soluble polymers used as additives in solid effects, the dilution quality characteristics of hard cement take a prominent role in the construction of a compact solid structure and thus improve its rigidity and workmanship. The quality of compression does not decrease with the use of SAP in self-healing concretes. The excision flexibility with SAP is not reduced in self-curing concrete. SAP can be used up to 0.6% of the bond weight without changing the different quality of the cement. Keywords: Concrete; Curing; Evaporation; Water Soluble Polymers; Superabsorbent Polymer (SAP);   INTRODUCTION: It is important to ensure proper handling of concrete structures that meet the required performance and stability requirements. In traditional construction, it is achieved by external treatment, which is applied after mixing, maintenance and finishing. Internal curing is a very promising technology that can provide additional moisture to concrete for more effective wetting and self-destruction of cement [1]. Internal treatment means starting with a special treatment agent that provides additional moisture. At present, there are two main methods available for internal treatment of concrete. The first method uses porous saturated light aggregate to supply the internal water source (Eldblue) for each, and the chemical shrinkage consumed during the hydration of the cement can replace the water [2]. The second method uses superabsorbent polymers (SAP), because these particles are made of concrete that can absorb water in large quantities during mixing and can cause free water to contain large signals, and also during the hydration of the cement, it prevents extinction. For optimal performance, the internal treatment agent must have a high water absorption capacity and a high water absorption rate. Self-curing mixture that occurs when availability indicates additional internal hydration of the aqueous cement that is not part of the water. Traditionally, concrete treatment methods that do not leak from the surface of the water under such conditions are considered to be cured from the inside out. In contrast, internal treatment deposits (light-saturated soft amalgam, superabsorbent polymers, or saturated wood fibers) are often referred to as "internal treatment" as self-curing. Internal treatment refers to the process by which the hydration of the cement is due to the availability of additional internal water that is not part of the mixed water [3]. Most of these disadvantages are due to a lack of proper investigation into the conditions in the area, although many of the problems are currently being reduced through the use of better additives. First, more quality control is needed to maintain the required special properties. High-energy concrete must consistently meet high performance standards to be effective. Second, you need to carefully select the material. Use high-quality materials. These materials can cost more than low-quality materials. Third, the acceptable pressure design discourages the use of high energy concrete. The use of load factor and resistance design is a solution when using high strength concrete [4]. Fourth, a minimum coverage in the reinforcement or the minimum thicknesses of the members can limit the maximum gain. Fifth, the prestige power available to the member may be insufficient to obtain maximum power. RELATED STUDY: The superabsorbent polymer is used as a self-hardening agent. M40 concrete grade is certified for research. It shows that water retention in concrete mixes incorporating a self-curing factor is higher compared to conventional concrete mixes where weight loss is encountered over time. The optimal dose is the addition of 0.3% of SAP leading to a significant increase in mechanical strength (compressive strength and breaking strength d). The desired strength test results were obtained using polyethylene glycol as a self-treating agent. From the results of the workability tests, it was found that the self-treatment agent improves workability [5]. From the results of compressive strength, it was found that self-curing concrete gave more strength than concrete treated with conventional methods. It has been discovered N Chandra Sekhar Reddy* et al.  (IJITR) INTERNATIONAL JOURNAL OF INNOVATIVE TECHNOLOGY AND RESEARCH Volume No.8, Issue No.6, October – November 2020, 9726-9728.  2320 –5547 @ 2013-2020 http://www.ijitr.com All rights Reserved. Page | 9727 that self-curing can be achieved in high-strength concrete and there is a marked increase in the strength of self-cured high-strength concrete compared to conventionally cured high-strength concrete. SAP will absorb water and form large impurities, which basically consist of nothing but free water. This leads to water retention, that is, the formation of large water-filled pores in fresh concrete. Therefore, the pore structure is effectively designed to control self-drying. In their work, self-dehydration and water retention are described and discussed [6]. The description is based on a reinterpretation of the Bowers model of hydrating cement paste phase distribution. Internal processing may increase during the first day of high-level automatic expansion and the risk of cracking in concrete structures increases greatly as it develops in flexibility and gradually by progressive compression deformations, which pull on the force. To start later, tensile strength allows this to progress. METHODOLOGY AND MATERIALS: The objective of the exploratory program was to examine the quality of the self-curing concrete using a superabsorbent polymer (SAP) in the natural aggregates of M20, M30 and M40 review of the compression quality, and there is a behavior of push stress. The program consists of launching and testing a total of 54 solid shapes (12 by width) of 150 x 150 x 150 mm in size, 54 rooms (18 by width) of 150 x 300 mm in size. Among these 54 3D shapes and 54 cylinders, 6 3D squares and 6 drums relate to typical restoration concrete with 0% SAP, 6 cubes and 6 compartments compared to self-supporting concrete with 0.2% SAP, 6 shapes 3D and 6 rooms of self-restored concrete with 0.4% SAP, 6 3D boxes, 6 rooms in front of self-restored concrete with 0.6% SAP, 6 3D forms, 6 rooms in front of self-restored concrete with 0, 8% SAP, 6 3D squares and 6 barrels compared to SAP 1.0% self-contained concrete. Each of 54 solid forms and 104 barrels compare the quality of the dilution over 28 days. Superabsorbent Polymer: Superabsorbent polymer is a high-atom puffed polymer containing sets of solid hydrophilic polymers, e.g., carboxyl, hydroxyl, etc., and a certain level of cross-linking. And to maintain a very large volume of liquid for its own mass and can take up to 500 times its weight in pure water and drain the water used under pressure.  TABLE 3.1: Chemical Properties of Super Absorbent Polymer EXPERIMENTAL ANALYSIS: Place the test hitch under the needle bearing bar. Precisely lower the needle while keeping in mind the end goal of reaching the surface of the concrete glue and draining quickly, allowing it to infiltrate the test box. Repeat the method until the needle stops penetrating the test box to a point of 5.0 ± 0.5 mm estimated from the mold base. Day and age slips between times, water is added to concrete and time, the needle does not penetrate the test obstacle by an estimated 5.0 ± 0.5 mm from the base of the figure, and it is the time of the core set. Replace the old needle with the annulus needle. The concrete must be considered finally set when the needle, after placing the needle gently on the surface of the test obstacle, creates a connection in it, while the connection does not. The period between adding water to the joint and the time the needle makes contact on the surface of the test box, while the conduction is not made, is the last setting time. The split hardness results are shown in Table 4.1 for the M40 revision concrete for the different ratio self-curing concrete listed in SAP. Graphically, split elasticity results for M40 revision concrete for a different ratio of self-recovering concrete included from SAP. Cleavage toughness does not decrease with the use of SAP in self-curing concrete. SAP ductile split test will be extended without restoring normal cement contrast and dilution for 28 days.  Table 4.1: strain behaviour self curing concrete for M20 grade concrete.  Fig 4.1. Graphical representation of Stress-strain behaviour for M20 grade Concrete CONCLUSION: SAP can be used as a restorative agent for self-supporting concrete. SAP can be used up to 0.6% of the bond weight without changing the different N Chandra Sekhar Reddy* et al.  (IJITR) INTERNATIONAL JOURNAL OF INNOVATIVE TECHNOLOGY AND RESEARCH Volume No.8, Issue No.6, October – November 2020, 9726-9728.  2320 –5547 @ 2013-2020 http://www.ijitr.com All rights Reserved. Page | 9728 cement quality. The hydric maintenance of the solid mixtures that are bonded to the self-recovery actuator is higher than that of normal cement, there is a slight increase in stress with increases in SAP doses.    REFERENCES: [1]  Sona K , Irin Mary Martin. Evaluation on Self Curing and Durability of Concrete Using Super Absorbent Polymer. International Journal of Research in Advent Technology June 2015, ISSN: 2321-9637.  [2]  Stella Evangeline. Self Curing Concrete and Its Inherentproperties. IJERA, ISSN : 2248- 9622, August 2014, pp.66-71.  [3]  Putturu Manoj Kumar , K.V.S Gopala Krishna Sastry. Strength Characteristics of Self Curing Concrete With Different Self Curing Agents. IJIRSET Sept 2016, ISSN : 2319- 8753. [4]  Huajian Li , Fali Huang, Guanzhi Cheng, Yongjiang Xie, Yanbin Tan, Linxiang Li, Zhonglai Yi. Effect of granite dust on mechanical and some durability properties of manufactured sand concrete. Construction and BuildingMaterials 109 (2016) 41–46.  [5]  Vijaya.B, Senthil selvan.S, felix kala.T, R. Annadurai. Experimental investigations on strength characteristics of concrete using manufactured sand. IJIRST jan 2015 IISN:249- 6010.  [6]  Shibin c. Haroon, v. Sreevidya, r. Venkatasubramani. Strength studies on self curing High Performance Fibre Reinforced Concrete (HPFRC). International Journal of Advanced Structures and Geotechnical Engineering ISSN 2319- 5347. Vol. 04, No. 03. 

Study On Strength And Stress Strain Behaviour Of Self Curing Concrete

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Study On Strength And Stress Strain Behaviour Of Self Curing Concrete

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