Tianjin Daxue Xuebao (Ziran Kexue yu Gongcheng Jishu Ban)/ Journal of Tianjin University Science and Technology ISSN (Online): 0493-2137 E-Publication: Online Open Access Vol:54 Issue:09:2021 DOI 10.17605/OSF.IO/MK4SU Sep 2021 | 153 STRENGTHENING OF REINFORCED CONCRETE SLABS USING BASALT TEXTILE REINFORCED MORTAR (BTRM) Ayman Shamseldein * , Fareed Elgabbas, Mohamed Kohail, Hany Elshafie * Corresponding author Structural Engineering Department, Faculty of Engineering, Ain Shams University, Egypt. ABSTRACT There is a considerable number of existing reinforced concrete structures worldwide which are not meet the current design standards because of inadequate design and/or construction or need for structural upgrading. Inadequate performance of this type of structures are a major concern from a public safety standpoint. This paper presents an experimental research program aimed at evaluating a retrofitting technique that utilizes high strength, lightweight, corrosion resistance advanced composites for retrofitting of existing reinforced concrete slabs. The proposed technique consists of applying basalt textile reinforced mortar to increase the stiffness and flexural strength of concrete slabs. A total of seven full scale reinforced concrete slabs were constructed and tested under four points loading. An increase of 177% to 266% in slabs’ flexural strength were achieved using basalt textile reinforced mortar depending on the amount of the textiles. This study clearly demonstrated the effectiveness of the proposed technique in retrofitting reinforced concrete buildings. Keywords: Tensile properties, basalt, textile reinforced mortar, BTRM. 1. Introduction There have been major advancements in composite materials used for the repair, retrofit, and reconstruction of civil infrastructure in the last thirty years. A composite system is made of two or more materials with different properties that, when combined, form a material with properties that are superior to those of its components. A matrix and a reinforcing fiber are commonly used in composites. To improve the safety and sustainability of civil structures, composite materials for structural applications have been produced. There will come a period in the life of a building when it needs to be repaired or demolished. Due to cost and inconvenience, the latter is usually the least appealing choice. Among the several composite systems used, especially for the repair of reinforced concrete, fabric-reinforced cementitious matrix (TRM) and fiber-reinforced polymer (FRP) have presented promising research and are considered viable strengthening as alternatives to traditional strengthening techniques such as steel sections and concrete jackets. FRP is comprised of fibers embedded into a polymeric resin matrix. The great success of FRP composites is determined by their high tensile strength, high strength-to-weight ratio (lightweight), and non-corrosive properties [1]. The use of FRP in the repair industry has grown in popularity as a result of numerous studies performed and published to better understand the properties of FRP systems and their best applications. Despite its many benefits, FRP has some drawbacks: Lack of
STRENGTHENING OF REINFORCED CONCRETE SLABS USING BASALT TEXTILE REINFORCED MORTAR (BTRM)
May 07, 2023
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