Ulubeyli, Gulden Cagin | Artir, Recep

Conference Object | 2015 | WORLD CONFERENCE ON TECHNOLOGY, INNOVATION AND ENTREPRENEURSHIP , pp.2191 - 2198

Blast furnace slag is a by-product from blast furnaces which is used to produce iron. Blast furnace slag has been used extensively as a successful replacement material for Portland cement in concrete materials to improve durability, produce high strength and high performance concrete, and brings environmental and economic benefits together, such as resource conservation and energy savings. Construction wastes define as relatively clean and heterogeneous building materials which are generated from various construction activities. Among them, ceramic, brick, and marble wastes can be included. These kinds of wastes can be used successf . . .ully as replacement materials in the cement mortar or concrete mixing. The use of alternative aggregate is a natural step towards solving part of the depletion of natural aggregate, and the alternative aggregate processed from waste materials which would appear to be an even more sensible solution. Recycled aggregates, such as ceramic, brick, and marble wastes, in the blast furnace slag concrete have been investigated in the limited number of studies to date. In the literature, use of these wastes in the concrete produced by blast furnace slag, as replacement materials in cement have not found adequate attention. Therefore, in the present study, the effects of ceramic, brick, and marble wastes used as fine/coarse aggregates on the properties of blast furnace slag investigated. Thus, the contribution of these wastes on the sustainability of blast furnace slag concrete was presented in a detailed manner. Consequently, construction waste aggregates and blast furnace slag can be used to improve the mechanical properties, workability, and chemical resistance of the conventional concrete mixtures. Since the construction waste and blast furnace slag wastes are available in vast amounts in Turkey, it is economically and environmentally suitable to use these materials as aggregates in the production of more durable concrete mixtures. (C) 2015 Published by Elsevier Ltd Daha fazlası Daha az

Sahin, Selim | Ulubeyli, Serdar | Kazaza, Aynur

Conference Object | 2015 | WORLD CONFERENCE ON TECHNOLOGY, INNOVATION AND ENTREPRENEURSHIP , pp.2298 - 2305

Crisis management is a process that includes catching and evaluating crisis signals and needs to take and implement necessary precautions in order to overcome a crisis with a minimal damage. Detecting the early warning signals of a crisis contributes firms to hinder the occurrence of the crisis and to survive without huge financial losses. Other factors that contribute construction firms to survive with zero defect can be listed as follows: (i) catching indirect signals before a crisis, (ii) developing proactive methods to defend themselves against the crisis by means of these signals, (iii) taking the crisis under control, (iv) tak . . .ing required measures after the crisis for the recovery of the firm, and lastly (v) recording the lessons learned from the crisis. Construction firms that can successfully manage a crisis can quit it with a minimum loss and can expand their market shares after the crisis. In other words, firms that can escape from a crisis with zero or minimum damage may strategically have competitive advantages over existing rivals. Considering all these issues, this study describes the concept of crisis management in terms of the construction industry and introduces related objectives and characteristics. In addition, both innovative crisis management approaches and the corresponding process were discussed in detail from the perspective of construction companies. In fact, this is a virgin area in the construction management literature and thus can contribute to the creative and innovative management of companies under potential crises in micro and macro levels. Consequently, this study attempts to reveal how construction firms can manage crises better and turn to their former positions in the short term through innovation-based means. (C) 2015 The Authors. Published by Elsevier Ltd Daha fazlası Daha az

Ulubeyli, Gulden Cagin | Artir, Recep

Conference Object | 2015 | WORLD CONFERENCE ON TECHNOLOGY, INNOVATION AND ENTREPRENEURSHIP , pp.2181 - 2190

World Conference on Technology, Innovation and Entrepreneurship -- MAY 28-30, 2015 -- Istanbul, TURKEY WOS: 000380509900265