Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Dogan, Akar(5)
- Kismet, Yilmaz(5)
- Cemalgil, Selim(4)
- Etli, Serkan(4)
- Wagner, Manfred H.(4)
- Guler, Omer(3)
- Yön, Merve Şahin(3)
- ALMisned, Ghada(2)
- Akgül, Melek(2)
- Akkurt, Nevzat(2)
- Aslan, Naim(2)
- Bahceci, Ersin(2)
- Chen, Xingli(2)
- Gul, Ali Oktay(2)
- Gönen, Tahir(2)
- Kısmet, Y.(2)
- Kısmet, Yılmaz(2)
- Onat, Onur(2)
- Qiang, Yujie(2)
- Taşgın, Yahya(2)
- Tekin, H.O.(2)
- Xiong, Yaxuan(2)
- Xu, Qian(2)
- Yang, Gang(2)
- Yilmaz, Mehmet(2)
- Zheng, Qiang(2)
- Zhong, Liqiong(2)
- Zou, Zhenwei(2)
- Acikgoz, Abuzer(1)
- Agar, Salih(1)
- Akpolat, Mustafa(1)
- Aksakal, B.(1)
- Aksakal, Bunyamin(1)
- Aktas, Bulent(1)
- Albayrak, M. Gokhan(1)
- Arman, Yusuf(1)
- Arslan, Furkan(1)
- Arıkan, Volkan(1)
- Askin, Ali(1)
- Aydoğmuş, Ercan(1)
Yayınlar
- MakaleYalnız künye2018Scopus SJRQ2Curing effect on mortar properties produced with styrene-butadiene rubber
Cemalgil, Selim; Etli, Serkan; Onat, Onur
This paper presents an experimentally investigation pertinent to the mechanical properties of rubberized mortar (RM) with styrene-butadiene rubber (SBR). The SBR were used with constant water-to-cement ratio of 0.485 and two different volume proportion of SBR particles were utilized as aggregates. One types of SBR particles with fineness modulus of 4.951 were utilized 0%, 10%, and 20% of aggregate volume. Effectiveness of SBR replacement ratio, curing and aging effect on the compressive strength, flexural strengths as well as load-displacement. Compressive and flexural strength of concrete were investigated at the end of 28-days and 56-days age. Obtained results demonstrated that utilization of SBR reduced the flexural strength of SBR mortar at the earlier curing age while SBR increased. Moreover, mechanical properties of mortar mentioned above were significantly affected by the water cure timing with an increasing proportion of the replacement level of SBR.
AtıfScopus11WoS11OpenAlex13
İncele - MakaleYalnız künye2017Scopus SJRQ3Enhancing the potential of employing thermosetting powder recyclates as filler in LLDPE by structural modifications
Kismet, Yilmaz; Wagner, Manfred H.
Potential of using powder coating recyclates as filler material for polyethylene compounds was investigated. Due to their strong adhesion to the metal surface during compounding at extrusion temperatures higher than 100 degrees C, the coating powder recyclates were chemically modified to facilitate its processing by extrusion and injection molding at higher temperatures. For this purpose, the coating powder recyclates were first hydrolyzed with addition of an alcohol as swelling agent. The deactivated recyclates were mixed at different ratios with the matrix polymer, a linear low-density polyethylene (LLDPE). The mixtures obtained were then compounded by extrusion and subsequently injection molded to plates to produce specimens for testing. The resulting samples were characterized mechanically by tensile, bending, and impact strength tests. In summary, the powder coatings recyclates can be processed as filler for thermoplastic material, without any adhesion problems up to 160 degrees C and 180 degrees C in the extruder and in the injection molding machine, respectively.
AtıfWoS12OpenAlex13İncele - MakaleYalnız künye2017Scopus SJRQ3Synthesis and characterization of Bioglass-based bone grafts with Gelatine substitution for biomedical applications
Aksakal, B.; Demirel, M.
Background: Syntesizing alternative bone graft materials are important in biomedical applications. Their morphology, mechanical properties and cell viability plays an important role in tissue engineering. OBJECTIVE: Bioglass (B) based bone grafts with Gelatin (G) substitution were syntesized via the sol-gel method and were compared with various Gelatin and Bioglass concentrations (wt%). METHODS: Syntesized bone grafts were characterized by Scanning Electron Microscopy (SEM) and X-ray diffraction (XRD) to show the structural and morphological changes of the fabricated B-based bone grafts. RESULTS: It was demonstrated that the concentration of pore size increased with increasing amounts of Gelatin in wt%. The biograft-B40G20 produced the highest flexture strength and hardness. Increasing the pore size caused a decrease in hardness and flexture stress of B-based biografts. CONCLUSIONS: Cell viability tests were conducted on the fabricated biografts and it was shown that the cell viability increased in fabricated B-based bone grafts.
AtıfScopus1WoS1OpenAlex1
İncele - MakaleAçık Erişim2017Scopus SJRQ1Change of mechanical properties of powder recyclate reinforced polyolefin based on gamma radiation
Kismet, Yilmaz
In this study, the changes observed in the mechanical properties of standard test specimens that were produced with powder coating reinforced polyolefin (polyethylene and polypropylene) due to gamma radiation were examined. Matrix material of these specimens included low density polyethylene and polypropylene and 5%, 10%, 20%, 30%, 40% and 50% electrostatic powder coating waste by weight, and the samples were exposed to 44 kGry gamma-radiation for twenty four hours. Mechanical tests applied to the specimens after radiation demonstrated that the physical bonding mechanism between matrix material and filler material was reinforced. In the mechanical tests, tensile strength, three-point bending strength, and Izod impact strength of the samples were investigated and the results were compared to the results obtained in the mechanical tests when they were not radiated. Thus, the effects of gamma radiation on the mechanical properties of the filler material, and the electrostatic powder coating reinforced polyethylene and polypropylene were determined. Furthermore, section images of the radiated samples were taken with a scanning electron microscope and compared to the section images of irradiated samples to observe the physical bonding mechanism.
AtıfScopus12WoS12OpenAlex15İncele - MakaleAçık Erişim2016Scopus SJRQ2Performance evaluation of crumb rubber and paraffin modified stone mastic asphalt
Kök, Baha Vural; Yilmaz, Mehmet; Akpolat, Mustafa
Recently, crumb rubber (CR) obtained from waste tires and Fischer-Tropsch paraffin are mostly used in bitumen modification to improve the performance of bituminous mixtures. Each of these additives affects the different properties of mixtures. There are limited studies in the literature about the combined usage of additive in the same mixture to utilize the different characteristics. In this study, the stability, stiffness, fatigue resistance, permanent deformation resistance, and moisture susceptibility characteristics of the stone mastic asphalt prepared with the bitumen modified with CR and paraffin were examined and compared with the control mixture. It was determined that CR-modified mixtures showed significantly more elastic characteristics. The mixture in which the 10% CR and 3% paraffin were used together gave better results in terms of moisture susceptibility and fatigue resistance when compared with the control mixture. It was determined that the use of paraffin together with CR contributed to the improved performance, and was in accordance with the CR in terms of mechanical characteristics of stone mastic asphalt.
AtıfWoS12OpenAlex13İncele - MakaleYalnız künye2014Scopus SJRQ2PRODUCTION OF MATRICES WITH MOLYBDENUM AS AN ALTERNATIVE TO MATRICES WITH COBALT IN DIAMOND CUTTING TOOLS
Çelik, Ertugrul; Islak, Serkan; Ilkiliç, Cumali
This study is about the production of new matrices that are an alternative to cobalt matrices in diamond cutting tools. Thus, Fe, Cu, Al2O3 and Mo were used as the matrix components. The mass fractions of 1 %, 2 % and 3 % Mo were added to the matrix. The production of matrices was performed in a fully automatic hot-pressing machine under 35 MPa of pressure, at a sintering temperature of 850 degrees C, with a dwell period 4 min. The microstructures and phase compositions of the matrices were established with a scanning electron microscope (SEM-EDS) and an X-ray diffractometer (XRD). The hardness and bending strength of the segments were determined. The transverse rupture strength (TRS) of the segments was determined using the three-point bending test. The results revealed that Mo increased the bending strength and hardness of the segments.
AtıfWoS4İncele - MakaleYalnız künye2010Scopus SJRQ2INFLUENCE OF CURING CONDITIONS AND AGGREGATE TYPE ON MECHANICAL PROPERTIES OF SELF COMPACTING LIGHTWEIGHT CONCRETE
Gönen, Tahir; Yazicioglu, Salih
Lightweight concrete has important advantages, especially in terms of earthquakes. Besides, the production of lightweight concrete with lightweight aggregate is a problem, because workability of lightweight concrete is difficult. If self compaction property can be added to the lightweight concrete, this negativity can be removed. In this study, mechanical properties of self compacting lightweight concrete (SCLWC) containing expanded perlite and pumice aggregates were investigated. Moreover, mechanical properties of self compacting (SCC) and lightweight (LC) concrete were investigated by being compared with SCLWC. Powder phase of self compacting lightweight concrete was consisted of CEM I 42.5 N cement type and C class fly ash. Pumice and expanded perlite aggregates were used in aggregate phase. Compressive strength and flexural tensile strength at 7, 28 and 90 days were determined on specimens were cured in water and air at the same ages. Obtained test results showed that SCLWC of 50 MPa compressive strength at 28 days can be produced by the use of lightweight aggregate and this concrete was not effect to curing condition as much as conventional concrete.
AtıfWoS1İncele