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ABSTRACT
Electromagnetic shielding has become more important in recent years as a result of increased electromagnetic environment pollution, its long-term health effects and information security in buildings. Therefore, the studies on building materials that can prevent electromagnetic emission have caused great attention. Additionally, accurate measurements of electrical characteristics properties of materials can provide scientists and engineers with valuable information to properly incorporate the material into its intended application for more solid designs or to monitor a manufacturing process for improved quality control. This paper mainly focused on the progress and prospective future of cementitious building materials by using waste metallic chips as a constituent for the purpose of electromagnetic shielding, wave absorbing activities and electrical properties of materials. For this purpose, natural sand was replaced in volume provided from different industrial areas in the production of cementitious composite, and these materials were examined to determine their electromagnetic shielding, absorbing capabilities and dielectrical constants. As a result, although reference sample has almost 7 dB shielding efficiency, sample having iron chips (60%) has 18 dB shielding efficiency which is known as good shielding material property value.
Acknowledgements
This study was supported by Akdeniz University Scientific Research Supporting Unit (BAP), and measurements were carried out at Near Field Antenna Laboratory at Akdeniz University Industrial Based Microwave Research and Application Center (EMUMAM)granted by State Planning Organization (2007K120530-DPT).
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No potential conflict of interest was reported by the authors.
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Notes on contributors
Mehmet Cakir
Mehmet Cakir was born in Burdur, Turkey, in 1984. He received the engineering degree from Akdeniz University. He is a research assistant at Bayburt University. His research interests include electromagnetic compatibility, wave propagations and dielectric constant.
Niyazi Ugur Kockal
Niyazi Ugur Kockal is an academician of Department of Civil Engineering in Akdeniz University. He received his PhD degree in construction materials from Bogazici University. His research areas include cement-based materials with different properties; cementless mixtures (geopolymers); ceramic tiles and bricks and investigation of the usage areas of waste materials in the production of building materials.
Sukru Ozen
Sukru Ozen was born in Antalya, Turkey, in 1971. He received the engineering degree from the University of Yıldız Technical and PhD degree from the University of Sakarya, Turkey, in 1992 and 2003, respectively. He is a professor of electrical engineering at the University of Akdeniz. Since 1998, he has been engaged in studies on the biological effects of electromagnetic fields, including studies on mechanisms of interaction and biomedical applications. His research interests also include electromagnetic compatibility, wave propagations, numerical methods, applied electromagnetic and biomedical engineering problems.
Atalay Kocakusak
Atalay Kocakusak got his Bs degree in Electrical Engineering from Akdeniz University (Antalya), Turkey, in 2014. He has been with RF design group since 2010. He joined EMC test groups at Industrial and Medical Applications Microwave Center (EMUMAM) located in Akdeniz University Campus in 2014 (after he received his Bs. EE) and he is responsible for EMC test facilities. His research interests are dielectric measurements, EMC tests including RF and conducted emissions and locating systems based on WiFi systems.
Selcuk Helhel
Selcuk Helhel started his career with Goltas Cement Factory as a control engineer developing PLC codes in AEG Modicon S5 platform for factory Line-2 modernization project. By January 1994, he joined Space Technologies Department (to UEKAE in 1996) at TUBITAK as a researcher and spent 5 years on radio telescope design, EMC platforms and facilities, military and civil based EMC tests including MIL-STD 461-462 and some industrial projects between 1993 and 1998. He got training about EMC measurement techniques and EMC perspectives in circuit design at University of Missouri Rolla (USA, 1997). Between 1998 and 2002, he got industrial experience about GSM RF planning and optimization at TURKCELL, MOTOROLA, NEXTEL, AT&T, LUCENT Technologies, Saudi Telecom, AVEA and ERICSSON as an RF Planning and Optimization Expert. He was with MOTOROLA as a regional manager between 2000 and 2001. He founded a RF planning company named Ant Neptune Telecommunication Limited and managed international projects between 2001 and 2003. In 2003, he turned back to academic studies at S. Demirel University (Turkey) as a lecturer. He held a position of vice director at BAUM. He was with Dublin City University (Ireland, in 2004 and 2005) for his PhD studies, and he was with University of New Mexico (USA) as a fellow researcher in 2006. He has been a member of Akdeniz University as an assistant professor at Electrical and Electronics Engineering Department since 2006 and as an associate professor in the same department since 2012. He has also been a director of Industrial and Medical Application Microwave Research Center (EMUMAM), since 2008. During the time period of 2010 and 2014, he held a position of vice manager at TUBITAK National Observatory. He was a member of Board of Directors of Antalya Technopark between 2008 and 2012. His research interests are microwave propagation, radar systems, EMC, EMI, WiMAX and WiMAX based video transmission, backbone and capacity planning for telecommunication systems, optical polarimeters and communication. Project management, total quality management and university-industry relations are his professional interests.