International Journal of Advances in Engineering and Management (IJAEM) Volume 3, Issue 12 Dec 2021, pp: 862-865 www.ijaem.net ISSN: 2395-5252 DOI: 10.35629/5252-0312862865 Impact Factor value 7.429 | ISO 9001: 2008 Certified Journal Page 862 Impact Energy Assessment on Rubber-Tyre Concrete using different Methods on Two- Weibull Parameters A.O. Ibrahim 1 , F.O. Adeyemi 2 , Y. K. Umar 3 , M. Bello 4 and M. Usman 5 1,4 Department of Civil engineering, Faculty of Engineering andTechnology,University of IlorinUniversity of Ilorin, Ilorin, Nigeria 3 Department of Architecture, Faculty of Environmental Sciences,Federal University B/Kebbi, Nigeria 2 Department of Civil engineering, Faculty of Engineering and Technology, Ajayi Crowther University, Oyo, Nigeria 5 Department of Building, Faculty of Environmental Sciences, Kebbi State University of Science and Technology, Aliero, Nigeria --------------------------------------------------------------------------------------------------------------------------------------- Submitted: 01-12-2021 Revised: 11-12-2021 Accepted: 14-12-2021 --------------------------------------------------------------------------------------------------------------------------------------- ABSTRACT In this study, an attempt was made to investigate the effect of fire on impact resistance of tyre-rubber concrete (TRC), subjected to drop weight test in accordance with the procedure suggested by ACI committee 544. For this, three samples were prepared from each series of mix containing tyre fibres of 10 mm width and length in various proportions viz., 0%, 2.5%, 5.0% and 7.5%, with a water cement ratio of 0.55. The results obtained were statistically investigated using Weibull Distribution. The Weibull parameters were determined by three estimation approaches; EPM (Energy Pattern Method), Probability Density Function (PDF) and Method of Moment (MOM). Analysis suggested that the three methods are more effective in estimating the weibull parameters. Though there are less differences. Therefore, designers can choose impact strength design value based on the required reliability. Keywords: tyre-rubber concrete, fire, impact resistance, weibull parameter, EPM, PDF, MOM I. INTRODUCTION AND CONCEPT 1.1 Introduction Disposal of waste tyres has become a global problem(Hanbing et al.,2016). In many countries, burying the waste tyres is a common disposal method, which shortens the service life of the burial ground and causes a very serious threat to ecology. Therefore, effectively reusing waste tyres is an urgent and important issue for saving energy and protecting the environment. Concrete is an essential material in construction(Romeekadevi,2016). The increasing demand of concrete has impacted on the environment ecological balance. Also, the cost of the convectional aggregate is soaring higher. This has led to research for an alternative in the use of natural organic materials, industrial by-products (tyre) in producing lightweight concrete with higher impact energy. Impact energy of a concrete is the amount of energy absorbed by a concrete when struck by a hard impactor which depends on the contact zone and the impactor. Bai et al., (2018) observed that many researchers have obtained a lot of research results with the development of fire science theory, which focused on research of heating process of fire district and temperature distribution within the reinforcement and concrete under fire. After fire, the problem concerned by people is the safety of buildings, which is to evaluate the damage of structural component, propose economic reinforcement scheme of repair or removal, reinstate as soon as possible and reduce economic loss. Murali et al. (2014), investigated the impact resistance of fiber reinforced concrete (FRC), subjected to drop weight test in accordance