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Öğe Flexural behavior of polymer-based textile-reinforced concrete using basalt fibers(Crc Press-Balkema, 2019) Çomak, Bekir; Soliman, Eslam; Chennareddy, Rahulreddy; Taha, Mahmoud RedaTextile reinforced concrete (TRC) is a class of cementitous composites that entails several advantages compared to traditional reinforced concrete such as lightweight, high tensile strength, design flexibility, and potentially corrosion free. As a result, TRC is suggested in a variety of structural applications including facades, protection panels, bridges, and waterproofing systems. A typical TRC element consists of multiple fiber fabrics embedded in thin cementitous concrete plate. Previous research reported a high potential for debonding between the fiber fabrics and the surrounding cementitous matrix due to poor impregnation and relatively high voids content. Recently, a new class of TRC is introduced by replacing the cementitious matrix by a polymer matrix to overcome the debonding problem. In this paper, textile-reinforced polymer concrete (TRPC) is produced using basalt fiber textile mesh and fine-grained Methyl Methacrylate (MMA) polymer concrete. Four different specimen configurations were produced by incorporating 0, 1, 2, and 3 textile layers in polymer concrete. Three-point bending test was carried out to examine the flexural performance of the TRPC specimens and the flexural strength of the different configurations was compared. In addition, the crack pattern intensity was determined via image processing technique to assess the ductility of TRPC. Comparison between different TRPC configurations reveals that increasing the number of fabric layers significantly improves the flexural behavior of TRPC.Öğe Effects of Surface and Fiber Types on Mechanical Properties of Fiber Reinforced Polymer Bars(Springer International Publishing Ag, 2018) Beycioğlu, Ahmet; Arslan, Mehmet Emin; Seis, Muhammet; Aydın, AbdulkerimIn this study, effects of surface form (sand coated and helical ribbed surface) and fiber types (glass, carbon, aramid and basalt) on tensile strength and elastic modulus of fiber reinforced polymer (FRP) bars were investigated. The results showed that FRP bars with helically wrapped surfaces have higher tensile strength and elastic modulus than those of FRP bars with sand coated surface.Öğe Marshall Stability Estimating Using Artificial Neural Network with Polyparaphenylene Terephtalamide Fibre Rate(Ieee, 2016) Karahançer, Şebnem; Çapalı, Buket; Erişkin, Ekinhan; Morova, Nihat; Serin, Sercan; Saltan, Mehmet; Küçükçapraz, Dicle ÖzdemirDue to the complex behaviour of asphalt pavement materials under various loading conditions, pavement structure, and environmental conditions, accurately predicting stability of asphalt pavement is difficult. To predict, it is required to find the mathematical relation between the input and output data by an accurate and simple method. In recent years, artificial neural networks (ANNs) have been used to model the properties and behaviour of materials, and to find complex relations between different properties in many fields of civil engineering applications, because of their ability to learn and to adapt. In the present study, laboratory data are obtained from an experimental study that was used to develop an ANN model. For predicting the Marshall Stability value of mixture using ANN models, an appropriate selection of input parameters (neurons) is essential. There are four nodes in the input layer corresponding to four variables: Polyparaphenylene Terephtalamide fibre (PTF) rate, binder rate, flow, volume of the specimen. The result indicates that the proposed model can be applied in predicting Marshall Stability of asphalt mixtures. The model is further applied to evaluate the effect of different rates of Polyparaphenylene Terephtalamide on Marshall Stability.Öğe Investigating the Influence of Waste Basalt Powder on Selected Properties of Cement Paste and Mortar(Iop Publishing Ltd, 2017) Dobiszewska, Magdalena; Beycioğlu, AhmetConcrete is the most widely used man-made construction material in civil engineering applications. The consumption of cement and thus concrete, increases day by day along with the growth of urbanization and industrialization and due to new developments in construction technologies, population growing, increasing of living standard. Concrete production consumes much energy and large amounts of natural resources. It causes environmental, energy and economic losses. The most important material in concrete production is cement. Cement industry contributes to production of about 7% of all CO2 generated in the world. Every ton of cement production releases nearly one ton of CO2 to atmosphere. Thus the concrete and cement industry changes the environment appearance and influences it very much. Therefore, it has become very important for construction industry to focus on minimizing the environmental impact, reducing energy consumption and limiting CO2 emission. The need to meet these challenges has spurred an interest in the development of a blended Portland cement in which the amount of clinker is reduced and partially replaced with mineral additives - supplementary cementitious materials (SCMs). Many researchers have studied the possibility of using another mineral powder in mortar and concrete production. The addition of marble dust, basalt powder, granite or limestone powder positively affects some properties of cement mortar and concrete. This paper presents an experimental study on the properties of cement paste and mortar containing basalt powder. The basalt powder is a waste emerged from the preparation of aggregate used in asphalt mixture production. Previous studies have shown that analysed waste used as a fine aggregate replacement, has a beneficial effect on some properties of mortar and concrete, i.e. compressive strength, flexural strength and freeze resistance also. The present study shows the results of the research concerning the modification of cement paste and mortar with basalt powder. The modification consists in that the powder waste was added as partial replacement of cement. Four types of common cement were examined, i. e. CEM I, CEM II/A-S, CEM II/A-V and CEM II/B-V. The percentages of basalt powder in this research are 0%, 1%, 2%, 3%, 4%, 6%, 8% and 10% by mass. Results showed that the addition of basalt powder improved the strength of cement mortar. The use of mineral powder as the partial substitution of cement allows the effective management of industrial waste and improves some properties of cement mortar.
