International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 07 Issue: 10 | Oct 2020 www.irjet.net p-ISSN: 2395-0072 © 2020, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 602 Evaluation of Mechanical Properties of Basalt Fiber Reinforced Lightweight Concrete P Bharath 1 , R Shanthi Vengadeshwari 2 1 Student, Dept. of Civil Engineering, Dayananda Sagar College of Engineering, Bengaluru-560078 2 Associate Professor, Dept, of Civil Engineering, Dayananda Sagar College of Engineering, Bengaluru-560078 ---------------------------------------------------------------------***---------------------------------------------------------------------- Abstract - Lightweight aggregate concrete has a lot of brilliant properties such as light weight, high strength, heat preservation, heat insulation, fire proof, antifreeze, earthquake, and is unaffected to chemical corrosion. But light aggregate concrete is easy to generate craze, bigger brittleness. We are supposed to boost toughness of lightweight aggregate concrete and find the key technologies of high performance lightweight aggregate concrete. This can be attained by adding fibers (basalt fibers) to light weight aggregate concrete. The influence of basalt fiber on the strength of lightweight aggregate concrete was systematically studied. The experimental results show that the basalt fiber lightweight aggregate concrete has a flexural strength increased by 62%, the compressive strength is improved by 10% and the toughness is increased by 36% compared with that of the non-fiber. Key Words: Lightweight aggregate concrete; fibre lightweight Concrete; Basalt Fibre; fibre Reinforcement; 1. INTRODUCTION 1.1 Lightweight Aggregate and fibres Lightweight aggregate concrete with light, heat insulation, heat insulation, fire and seismic and many other advantages, has become the amount of ordinary concrete after the new building materials. But high-strength lightweight aggregate concrete is still a prominent flaw, that is, the material brittle, that is, its tensile, bending, impact resistance and toughness and other poor performance. Therefore, how to enhance the toughness of lightweight aggregate concrete is the key to the development of high performance lightweight aggregate concrete. As the fiber has a good toughening, cracking, anti- wear properties, the chopped fiber used in mortar and concrete, the fiber through the bridge cracks can improve the cement matrix toughness, tensile strength, and bending strength, so that the inherent brittleness problem of cement concrete products has been greatly improved. 1.2 Basalt Fibre Basalt fiber is parallel to carbon fiber and fiberglass, but basalt has better mechanical properties than fiberglass and is lower in cost than carbon fiber. It is used as a fireproof textile in the aerospace and automotive industries and can also be used as a composite to produce a wide range of products. 2. TESTS ON MATERIALS Table -1: Comparison between regular coarse aggregate and cinder. Property Coarse Aggregate Cinder Specific gravity 2.75 2.05 Fineness modulus 4.6 2.82 Water absorption (%) 0.5 1.3 Maximum nominal size 20mm 20mm Table -2: Tests on coarse aggregate Sl.No PROPERTIES VALUES 1 TYPE CRUSHED 2 WATER ABSORPTION ABOUT 0.1% 3 FINENESS MODULUS 7.35 4 IMPACT VALUE 26.28% 5 SPECFIC GRAVITY 2.58 6 ANGULARITY NUMBER 3 7 AGGREGATE CRUSHING VALUE 25.07%