Volume 21 No 2 (2023)
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Strength Characteristics of Glass Fibre Concrete Under Different Types of Curing
Jaison J Memadam ,T.V.S Vara Lakshmi
Concrete is an unavoidable construction material which is very strong in withstanding compressive forces but very weak in holding tensile forces. The addition of fibres in the concrete results in increasing its tensile, compressive, and flexural strength. The inclusion of fibres in the concrete is thus a very popular topic among various researchers. Curing of concrete maintains the water content inside the concrete which enables the hydration reactions that ultimately leads to the strength of the concrete. Improper curing of concrete leads to many strength defects, durability defects, resistance to freezing and thawing, scaling, and abrasion resistance etc. There are different types of glass fibres available in the market among which we are using alkali resistant glass fibres for this research. Normal immersion curing, polythene membrane curing, and calcium chloride integral curing are the types of curing that are followed in this paper. The optimum amount of glass fibre to be added to the concrete is identified by varying the percentages of glass fibre from 0 to 4 % in multiples of 0.5. The best suited colour for polythene membrane sheet curing is identified by comparing the Compressive strengths using white, black, blue, and pink coloured membrane sheets. The optimum amount of calcium chloride to be added to the concrete for the integral curing is also identified by varying the percentages of calcium chloride from 0 to 3 % in the multiples of 0.5. The compressive strength, tensile strength and the flexural strength of the glass fibre concrete is determined after 28 days of curing. The relation between flexural strength and compressive strength of glass fibre concrete is identified using regression analysis.
Glass fibre concrete, Curing, Calcium chloride, Integral curing, Membrane curing, Tensile strength, Flexural strength, Workability.
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