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    EXPERIMENTAL EVALUATION OF HYBRID BARRIER SYSTEM FILLED WITH WASTE MATERIALS
    (2021-08) Ali, Zagros Othman
    Barrier systems are one of the main factors to diminish fatal traffic accidents. Research in the literature focused on developing concrete, steel and only few timber barriers but the aesthetic and environmental effects of such barriers were neglected or not discussed extensively. Waste material management has been a big deal of the world with the technological and industrial development. This study presents a novel approach to hybrid barriers produced with timber, and waste materials (slag and tire). Therefore, the aim of the study is to contribute to highway safety aesthetically, economically, and environmentally. In this regard, pendulum experiments were conducted to observe the performance of the proposed hybrid barrier type considering EN 1317 standard. Hybrid barriers filled with sand and slag had similar results with A-class ASI index and W6 class working width and successfully passed the limits however the hybrid barrier filled with tire did not be able to meet the requirements. The hybrid barriers can be offered as an aesthetic and pleasant alternative to conventional barrier types, especially in scenic, mountainous, rural and historical places. This study is thought to contribute reducing environmental pollution by using recyclable materials and to diminish the cost of conventional timber barriers. Additionally, the outcomes of this study will encourage the utilization of various waste materials in future studies.
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    Experimental performance evaluation of an innovative hybrid barrier system filled with waste materials
    (Elsevier Sci Ltd, 2022) Yumrutas, Halil Ibrahim; Ali, Zagros Othman
    Roadside barriers have been one of the main contributors to reducing fatal traffic accident severities. There is limited knowledge about the potential for using natural/waste materials for roadside barrier applications. This paper aims to develop a novel hybrid roadside barrier type by using timber and waste materials (slag and tire) together and to observe the performance. In this regard, pendulum crash tests were conducted and deformation, working width, and severity performance of each hybrid barrier type were evaluated following EN 1317 road restraint systems standard. Experimental results revealed that hybrid barriers produced with waste materials can be alternative to conventional barriers. They can be recommended to place, especially in scenic, mountainous, and historical roadsides due to their aesthetic design and environmentally friendly features. This is the first step towards enhancing innovative hybrid barriers and will serve as the basis for the next step, full-scale crash tests. Outcomes of this study will encourage the utilization of different waste materials in the production of roadside barriers in future studies and contribute to the diversification of utilization areas of waste materials.