Strength of concrete chopped Glass Fibers Tiles and effect of Glass Fiber

Abstract

In this project we use the M-20 grade concrete designed as per IS 10262. finding the effects of the flexural strength, tensile strength and also the compressive strength. The aggregates which is used in this design was 20mm in size. To study of compressive strength, flexural strength and tensile strength we cast the 6 cubes, 6 prism and 6 cylinders and tested it after the application of GFRC in the form of cement concrete tiles and in this process no special techniques was used for casting of tiles. The tiles thickness was 20mm and aggregate maximum size was 8mm. The water cement ratio was consistent and the some admixture content was varied from 8-1.5% to maintain slump in between 50mm-100mm. The mix proportion was 1:1.78:2.66. the short fibers size were 30mm and the glass fibers were alkali resistant. We carried out the effect of this short fiber on the compressive strength and also on water absorption. We cast six full size tiles 400mm*400mm*20mm and tested and result recorded.

Introduction

I. INTRODUCTION

 Concrete is the one of the most important building and the use of this material is increasing day by day in the entire world. The main reason of its most using is that it is cheap and easily availability. How ever it has some disadvantages just like brittleness and the poor resistance to crack opening. It have very low tensile strength and it also brittle material so therefore fibers are used for increasing tensile strength and for decreasing the brittleness. Till now variors experiments are have been done on fresh concrete as same as on hard concrete. But the basic material remains same and superplasticizers, admixture, are used for the increase and decrease the setting time and getting the workability and higher compressive strength.

Fibres which are applied for structural concretes are classified according to their material

As Steel fibres, Alkali resistant Glass fibres (AR), Synthetic fibres, Carbon, pitch and polyacrylonitrile (PAN) fibres.

II. APPLICATIONS

The main area of FRC applications are as follows

1. Runway, Aircraft Parking and Pavements
2. Tunnel lining and slope stabilization
3. Blast Resistant structures
4. Thin Shell, Walls, Pipes, and Manholes
5. Dams and Hydraulic Structure
6. Different Applications include machine tool and instrument frames, lightingpoles,water and oil tanks and concrete repairs. 

III. ADVANTAGES AND DISADVANTAGES OF USING GLASS FIBERS IN CONCRETE

A. Advantages

1. Lighter weight
2. High flexural strength, high strength to weight ratio.
3. Toughness: GFRC doesn't crack easily-it can be cut without chipping.

B. Disadvantages

1. Durability:  According to ACI 544.1R-96, State of the Art Report on Fiber Reinforced Concrete, "The strength of fully-aged GFRC composites will decrease to about 40 percent of the initial strength prior to aging." Durability can be increased through the use of low alkaline cements and pozzolans.
2. GFRC as a material, however, is much more expensive than conventional concrete on a pound-for-pound basis.

IV. PRESENT INVESTIGATION

The main purpose of the research is to findout the tensile strength, compressive strngth and flexural strength and other properties of GFRC. This study carried out on M20 grade concrete with 30mm size of glass fibers and content of fiber is varied from 0% - 0.3% of total weight of concrete. For study of this three properties no admixture was used.

The glass fiber effect on concrete tiles was studied that fiber content varied 0% - 0.7% of total weight of concrete.  This tiles are used at various places because its heavy duty tiles aand also use for practical purpose.

V. RESULTS

A. Compressive Strength of Concrete (in N/mm2)

The 28 days compressive strength was studied and the values of 3 samples studied are shown in the tabular form. Table 2 shows the data of 28 days compressive strength obtained. Table 2 gives the 28 days compressive strength of concrete with maximum nominal size of aggregates 20mm.The 28 days compressive strength was also plotted Fig3 by taking the average of this three values overall an increase in the compressive strength was observed with addition of fibers.

Just lie Compressive strength test we did the

1. Split Tensile strength Test
2. Flexural Tensile strength Test
3. Water absorption of concrete Test

And  come on the conclusion.

Conclusion

The impact of short discrete glass fibres on the compressive, split tensile, and flexural strengths of concrete was investigated in this experimental programme. Additionally, the impact of glass fibres on cement and vibration-produced concrete tiles is investigated. Compressive strength, wet transverse strength, and water absorption are the three parameters examined. With an increase in fibre concentration, the concrete mix becomes harsher and less workable, necessitating the application of an additive. However, proper workability could not be achieved even after administering dosages of admixture as high as 1.5%, and some segregation was seen. As a result, increasing the fibre content above 0.7% was not practicable. The various observation based on the experimental result are as follows: 1) The presence of short discrete glass fibres with a fibre content in the range of 0.1% to 0.3% by weight of concrete had no effect on the compressive strength of concrete without additives. 2) The insertion of glass fibres boosts the concrete\'s split tensile strength. 3) The stress carrying capacity of concrete may rise in flexure because the flexural strength of concrete improves with an increase in fibre content. 4) The addition of fibres has been proven to boost the wet transverse strength of tiles. 5) As the fibre content of the concrete increases, so does its water absorption. 6) The presence of increasing amounts of fibres had a negative impact on the compressive strength of concrete with admixture, which remained unaffected up to 0.4% fibre content.

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Copyright

Copyright © 2022 Khushboo Darbar, Prof. Kavita Golkhade. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.