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Koleksiyondaki öğeler
- MakaleYalnız künye2020Scopus SJRQ1Evaluating occupational health and safety service quality by SERVQUAL: a field survey study
Demir, Pelin; Gul, Muhammet; Guneri, Ali Fuat
The adverse impact of occupational accidents and occupational diseases on the society have recently increased a lot since the industrial-oriented society is getting more and more widespread. Although attempts regarding occupational health and safety (OHS) increase in Turkey, they are still at an inadequate level. OHS experts prepare employees for a healthy and safer working environment, so that work accidents can be eliminated and employees can be healthy psychologically and physically. At the same time, the worksites can be prevented from being financially damaged and productivity can be improved. The aim of this study is to measure OHS service quality by the evaluations of OHS experts from various sectors and workplaces. In this way, the OHS performance is measured, the difference between perceptions and expectations of the OHS experts is determined and deficiencies are revealed. In the study, the OHS activities are examined in five dimensions using the SERVQUAL scale; tangibility, reliability, responsiveness, assurance and empathy. The questionnaire is carried out using a Likert-type five-point scale among 81 OHS experts from different sectors. In conclusion, SERVQUAL analysis is introduced as a useful tool for employers to better understand what they need to know about OHS services.
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İncele - MakaleYalnız künye2020Scopus SJRQ3A study of endohelminthes in some fish species caught between Kumlutarla-Gemici regions of Karakaya Dam Lake
Gun, A.; Dorucu, M.
AtıfScopus2WoS2İncele - MakaleAçık Erişim2021Scopus SJRQ2The usage of Ohmic heating in milk evaporation and evaluation of electrical conductivity and performance analysis
Ariç Sürme, Seda; Sabancı, Serdal
Ohmic heating is based on the principle of heating by passing an alternating current through the product between two electrodes and is an increasingly current electrical heating technique in food applications. The main purpose of the present study is to evaporate milk (cow's milk) from 7.85 kg-water/kg-dry matter (DM) content to approximately 3 kg-water/kg-DM content under atmospheric conditions in different voltage gradients and to examine the electrical conductivity (EC) value during the evaporation process. Also, performance evaluation was determined and compared with the traditional method. It was determined that the total process time in the Ohmic heating assisted evaporation (OHAE) process was 31–92.5 min, while in the traditional evaporation process, the total process time was 41.10 ± 2.1 min. The EC value was 0.43–1.89, 0.44–1.89, and 0.44–1.92 S/m for 7, 9, and 11 V/cm, respectively. In the OHAE process, it was determined that as the voltage gradient increased, the energy and exergy efficiency increased. The lowest energy and exergy efficiency values were obtained in the traditional method. In general, OHAE can be applied to milk, and it was a highly efficient process. Practical applications: Ohmic heating is one of the current electrical heating techniques studied in many areas by researchers. In this study, the change in electrical conductivity and performance values during the milk evaporation process was examined and compared with the traditional method. The OHAE process was more efficient than the traditional method in terms of both energy and exergy efficiency. It is thought that this evaluation will contribute as a data source for both industry and pilot-scale designs. Besides, it will contribute data to the literature with the exergy analysis that is limited in the Ohmic heating process. As a result, a concentrated milk sample with high yield and approximately 3 kg water/kg DM content was obtained.
AtıfScopus21WoS16OpenAlex20İncele - MakaleAçık Erişim2021Scopus SJRQ2Intercultural awareness, communication, and empathy skills in nurses and midwives working in provinces with mass migration
Gümüşsoy, Süreyya; Dal, Nursel Alp; Beydağ, Kerime Derya; Toker, Eylem
Purpose: The study was to evaluate the intercultural awareness, communication, and empathy skills of midwives and nurses (n = 479). Design and Methods: The descriptive study data were collected using the Communication-Skills-Scale (CSS), the Basic-Empathy-Scale (BES), and the Intercultural-Awareness-Scale (IAS). Findings: The total average scores of the CSS, BES, and IAS were found to be 100.07 ± 13.03, 70.70 ± 13.99, and 83.51 ± 14.24, respectively. There was a statistically significant difference between age, education, position, experience and the BES and IAS; gender, providing care for Syrian patients and the CSS and BES; marital status and the BES (P %3C.05). Practice Implications: Nurses and midwives have important responsibilities in terms of protecting and improving the health of migrant women.
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İncele - MakaleAçık Erişim2022Scopus SJRQ2A statistical overview to the chromosome characteristics of some Centaurea L. taxa distributed in the Eastern Anatolia (Turkey)
Açar, Mikail; Taşar, Neslihan
This study performed statistical analyses based on chromosome micromor-phology of 18 Centaurea taxa, two of which are endemic. ANOVA, Correlation analy-sis, Discriminant analysis and Cluster analysis were performed to determine the relationships between taxa based on chromosomal features. In addition, according to the data obtained from these analyses, the relationships between taxa and sections were tried to be interpreted. As a result of the analyses, the taxa C. drabifolia Sm. floccosa (Boiss.) Wagenitz & Greuter, C. kotschyi (Boiss. & Heldr.) Hayek var. floccosa (Boiss.) Wagenitz and C. behen L. and C. polypodiifolia Boiss pseudobehen (Boiss.) Wagen-itz were located close to each other. These taxa are located in the same sections in the morphological classification. Besides, in the Discriminant analysis, the taxa of Acrocen-tron, Microlophus, Cheirolepis sections were closely located compared to all other taxa. However, results were not seen to cover all taxa of the sections. This study revealed various chromosomal characteristics of some Centaurea taxa distributed in the Eastern Anatolia. It also performed statistical analyses on these data. While determining the relationships between taxa according to chromosomal characteristics, comparing chromosomal formulas and indices collectively and evaluating the relationships was found to be relatively consistent with morphological classification.
AtıfScopus3WoS3OpenAlex3İncele - MakaleYayıncıda açık erişim2023Scopus SJRQ3Vitamin content and MDA levels of certain white grape varieties from different altitudes in Turkey
Akbaba, Emel; Aydın, Sevinç; Sanyürek, Nesrin Karaca; Çakır, Atilla; Erişir, Figen Erdem
Grapevine (Vitis vinifera L.) is regarded as one of the world’s most important fruit crops in terms of acreage and commercial worth. Grapes are used to make not only wine but also fresh fruit, dried fruit, and juice. The quality of grapes or wine is significantly affected by environmental factors such as altitude, soil type, and climate. In this study, the 5 white grape varieties (Ağın beyazı, Tahannebi, Kabarcık, Şilfoni, and Besni) grown at different altitudes (800 m, 1000 m and 1200 m) in Turkey were investigated for their vitamin, and phytosterol concentrations as well as lipid peroxidation content. Şilfoni grape harvested at 800 m was found to possess the lowest lipid peroxidation content. High altitudes, were found to reduce lipid peroxidation contents in the Ağın beyazı, Tahannebi, and Kabarcık strains. The highest stigmasterol (98.34 μg/g), and beta-sitosterol (86.90 μg/g) concentrations were found within Şilfoni grape variety harvested at 800 m. The highest vitamin D-2 and D-3 levels were found in Ağın beyazı (1.39 μg/g) and Kabarcık (4.13 μg/g) grape varieties, both harvested at 1200 m. Kabarcık grape, however, revealed the highest concentrations of R-tocopherol (63.09 μg/g) and alpha-tocopherol (24.13 μg/g) at 1200 m within the samples. The highest vitamin K-2 level was determined within the Tahannebi grape (15.44 μg/g) from 1200 m. It was observed that the vitamin and phytosterol concentrations of white grape varieties tended to increase, while the lipid peroxidation values tended to decrease at high altitudes, especially at 1200 m. This study also exhibited a strong relationship among Vitamin D3, R-tocopherol, and alpha-tocopherol in the studied white grape cultivars.
AtıfScopus5WoS5OpenAlex3İncele - MakaleAçık Erişim2022Scopus SJRQ3The Effectiveness Of Trigger Point Treatment In Chronic Pelvic Pain; A Pilot Randomised Controlled Trial; [Wirksamkeit der Triggerpunkt-Therapie bei chronischen Unterbauchschmerzen – eine randomisierte kontrollierte Pilotstudie]
Atas, Kubra; Mutlu, Ebru Kaya; Yasa, Cenk; Ugurlucan, Funda Gungor
Objective To investigate the effectiveness of ischemic compression and low-level laser therapy methods combined with exercise on the myofascial trigger points in women with Chronic Pelvic Pain and to determine which method is more effective. Methods It was a parallel designed, single-blind pilot randomized clinical trial. Patients were recruited at physiotherapy laboratory of the Istanbul University from September 2017 to June 2019. Twenty-eight women patients with Chronic Pelvic Pain were included into the trial. Patients were randomized into two groups. Group 1 received ischemic compression and Group 2 received low-level laser therapy twice a week for 6 weeks. Both groups received the same standard exercise program. Pain, range of motion, pelvic floor symptom severity, quality of life, satisfaction, anxiety, and depression were assessed after 6 weeks, and 1-year follow up. Results Following the treatment, significant differences were observed within both group subjects in pain, range of motion, symptom severity, quality of life, and anxiety-depression (p < 0.05). This significant improvement in pain, symptom severity, symptoms related quality of life and pain subgroup of Short Form 36, continued after 1-year follow up (p < 0.05). In comparison between group, Group 1 have more significant improvement than Group 2 in terms of symptoms related quality of life (p < 0.05). Conclusion Both methods have shown efficacy and can be used safely in chronic pelvic pain patients. Because it is more effective on symptoms related quality of life, the ıschemic compression method may be preferred for primary use.
AtıfScopus1WoS1OpenAlex2İncele - MakaleYalnız künye2021Scopus SJRQ1Assessment of Seismic Behavior Factor of Code-Designed Steel–Concrete Composite Buildings
Etli, Serkan; Güneyisi, Esra Mete
In this study, the seismic behavior factor of steel–concrete composite buildings was examined. For this purpose, 5-, 10-, 15- and 20-story composite moment-resisting frame (CMRF) buildings having concrete-filled steel tube columns and composite beams were designed at medium ductility (DCM) and high ductility (DCH) levels as per the regulations of Eurocode 8. Examined DCM structures were designed for a PGA of 0.2 g while DCH structures were designed for a PGA of 0.4 g. SeismoStruct software was utilized in the design and performance assessment of the case study structures. Nonlinear static pushover and incremental dynamic analyses were used. In the pushover analysis, the uniform and triangular load distributions were adopted while 12 earthquake ground motions were employed in the dynamic analysis. The effect of ductility levels and number of stories on the seismic behavior of CMRFs was studied using the results of the nonlinear analysis. To this, the variation in the lateral response, global yielding value, code-based behavior factor and component, and dynamic behavior factor were presented for CMRF structures with DCM and DCH. It was observed that the behavior factor of all CMRFs exhibited well above the design assumptions, especially DCM class CMRFs.
AtıfScopus16WoS11OpenAlex34İncele - MakaleYalnız künye2021Scopus SJRQ2Effect of graphene reinforcement on hybrid bioceramic coating deposited on the produced porous Ti64 alloys
Aslan, N.; Aksakal, B.
Porous-Ti64 alloys (P-Ti64), produced at various porosities by hot-pressing technique with the help of Mg spacer, were coated by hybrid-Graphene Oxide (rGO) reinforced-hydroxyapatite (HAp), using the sol–gel method. The synthesized rGO powder was used in reinforcing HAp by the Modified Hummers method having 30 µm particle size and nano (nm) scale layer thickness. Hybrid coatings were executed on Ti64 substrates in four different groups as single-HAp, HAp reinforced with 0.5 wt%, 1.0 wt% and 1.5 wt% rGO for three different porosities (41, 52, and 64%) were characterized by FT-IR, Raman, XRD and SEM. The average 21 µm coating film thicknesses were obtained and desirably, the only superficial pores of the substrates were closed by coating material rather than the inner connected open pores. It was also shown that 0.5 wt% and 1.0 wt% rGO reinforcements into HAp prevented crack formation on the Ti64 surfaces, whereas 1.5 wt% rGo reinforcement and single-HAp coatings caused. The highest adhesion strength values were achieved at low porosities (41–52%) and of 0.5–1.0 wt% rGO reinforcements through the adhesion tests.
AtıfScopus14WoS12OpenAlex20İncele - MakaleAçık Erişim2022Scopus SJRQ2Effect of chlorpyrifos on some biochemical changes in Cyprinus carpio: the protective effect of ellagic acid
Mişe Yonar, Serpil; Yonar, Muhammet Enis; Ural, Mevlüt Şener; Pala, Ayşegül
In this study, ameliorative effects of ellagic acid (EA) on oxidative stress induced by chlorpyrifos (CPF) in carp, Cyprinus carpio, were investigated. Fish were divided into six groups: C (no treatment), EA (100 mg kg fish−1), CPF-1 (0.040 mg L−1), CPF-2 (0.080 mg L−1), CPF-1 + EA, and CPF-2 + EA. CPF and EA were applied simultaneously for 14 days and, at the end of the study, liver, kidney, and gill samples were collected from fish. On the taken tissue samples, malondialdehyde (MDA) level and some antioxidant enzyme (superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), and glutathione-S-transferase (GST)) activities were evaluated. The results demonstrated statistically significant increases in the MDA levels of the CPF-1 and CPF-2 groups. On the other hand, the MDA levels were significantly decreased by EA administration. Also, CPF exposure caused statistically significant increases in the SOD and GST activities and statistically significant decreases in the CAT and GPx activities. However, treatment with EA reversed negative alterations in the SOD, CAT, GPx, and GST activities. Therefore, the results of this study results showed that simultaneous treatment with EA alleviates CPF-induced oxidative stress in fish.
AtıfScopus8WoS10OpenAlex10İncele - MakaleAçık Erişim2021Scopus SJRQ3A BAYESIAN NETWORK-BASED APPROACH FOR FAILURE ANALYSIS IN WEAPON INDUSTRY
Yucesan, Melih; Gul, Muhammet; Guneri, Ali Fuat
Gun and rifle manufacturing contain various failures in the process of CNC machining, material supply, research & development, infrastructure and, operator. Due to these failures, the enterprise is exposed to great economic losses and a decrease in competition in the global market. In addition, failures in production cause events that seriously threaten human health. Failure analysis can increase safety by determining the cause of potential errors and taking measures for identified errors in the life cycle of the products. Therefore, this study employs a Bayesian Network (BN)-based modeling approach for capturing dependency among the basic events and obtaining top event probability. Firstly, a fault tree analysis (FTA) diagram is constructed, since its target is to pinpoint how basic event failures result in a top event (system) failure by an AND/OR logical gate. While, AND logical gate should take place in both cases, it is sufficient to realize one of the states in the OR logical gate. Then, a BN-based on fault tree transformation is applied. A case study in a leading weapon factory that produces various types of guns and rifles in the Black Sea region of Turkey is performed. For the application viewpoint, appropriate control measures can be taken into account to decrease the number of failed products based on the performed failure analysis.
AtıfScopus6WoS5OpenAlex7İncele - MakaleYalnız künye2023Scopus SJRQ1Understanding Suicides through the Processes of Bereaved Relatives: A Phenomenological Study : Understanding Suicides
Karatay, Gülnaz; Gürarslan Baş, Nazan
This phenomenological study aimed to deeply understand the perceptions, experiences, and coping mechanisms of families who have experienced completed suicide in the pre- and post-suicide periods. In this scope, in-depth interviews were conducted with a family member who had experienced completed suicide. Colaizzi’s analysis method was used for data analysis. The main theme of the pre-suicide process included sub-themes of traumatic experiences, unmanageable genetic inheritance, and alcoholism; the main theme of the approaching period included sub-themes of clear signals and accelerators; the main theme of the post-suicide process included sub-themes of difficulty in creating meaning, stigma and guilt, and unmet support needs; the main theme of perceptions of preventability included the sub-theme not everyone who is sick has to die and ultimately.
AtıfScopus1WoS1OpenAlex1İncele - MakaleYalnız künye2022Scopus SJRQ1Dynamic response model and equivalent solution method of large-diameter buried energy transportation pipeline under moving load
Xu, Qian; Yang, Gang; Li, Zhuorui; Zou, Zhenwei; Zheng, Qiang; Zhong, Liqiong; Chen, Xingli; Akkurt, Nevzat; Du, Yanping; Xiong, Yaxuan
Long-distance energy pipeline pass under roads, subjecting them to repeated stress and posing pipeline safety problems. To simulate the effects of vehicles driving over energy transmission pipeline, this paper examines large-caliber buried pipelines in the suburbs. In this study, a mechanical action model of vehicle-soil-pipeline (VSP) interactions to transform the process of a vehicle driving into the dynamic process of a load changing with time in the specified area was created. The VSP model was used to analyze the influence of moving load and position on the structural characteristics of the pipeline section. An equivalent solution method with high precision and high calculation efficiency was proposed. The results showed that as the loading position approaches the pipeline or the load increases, the stress value at the top of the pipeline gradually exceeded the stress value at the bottom of the pipeline and became the area with the maximum stress value. The minimum stress location also changed from the lower half near the pipeline bottom (Point D-135°) to the upper half near the pipeline top (Point B-45°or Point H-315°). Using the polynomial fitting method, the stress values of the maximum points were equivalently converted. Under the premise of considering pipeline safety, the most suitable functional relationship for the moving load equivalent model was obtained.
AtıfScopus16OpenAlex13İncele - MakaleAçık Erişim2022Scopus SJRQ1Graphene reinforced hybrid-bioceramic coatings on porous-Ti6Al4V for biomedical applications: morphology, corrosion resistance, and cell viability
Aslan, N.; Aksakal, B.; Dikici, B.; Sinirlioglu, Z.A.
The effect of Hydroxyapatite (HA)-based coatings reinforced with reduced graphene oxide (rGO) on porous-Ti6Al4V (P-Ti6Al4V) alloys in terms of electrochemical corrosion and cell viability for potential biomedical applications was investigated in this study. The scaffold-porous surfaces of P-Ti6Al4V were coated by the biocomposite structure of HA and reduced graphene oxide (rGO) at various porosity rates (40, 50, and 60%) by using the sol–gel dip-coating method. The results of 0.5, 1.0, and 1.5 wt% rGO-HA coatings were compared to coatings that contained only HA (free-rGO). Raman spectroscopy, X-ray diffractometer, and scanning electron microscopy were used for structural and morphological characterizations. The coatings in vitro corrosion susceptibilities were tested in simulated body fluid at 37 °C. Compared to free-rGO coatings, the results showed that rGO reinforcements phases reduced the corrosion rate of the scaffolds. The corrosion rate increased as the porosity content of the scaffolds increased. In vitro cell viability tests revealed that samples of 0.5 and 1.0 wt% rGO-HA coating groups performed better than the control and 1.5 wt% rGO-HA samples. Graphical abstract: [Figure not available: see fulltext.]
AtıfScopus8WoS7OpenAlex6İncele - MakaleAçık Erişim2021Scopus SJRQ1Attitudes of Married Muslim Women Regarding Family Planning Methods During the COVID-19 Pandemic in Western Turkey
Dal, Nursel Alp; Beydağ, Kerime Derya
COVID-19 had negative effects upon family planning. Women cannot visit healthcare facilities because of a fear of curfew-related sanctions or exposure to COVID-19. It is seen that religious beliefs are influential especially in terms of family planning method preference and having abortions. This study was conducted to determine the attitudes of married Muslim women regarding family planning methods during the COVID-19 pandemic period. The descriptive and cross-sectional study was conducted with 611 married Muslim women who presented to the family planning outpatient clinic of a public hospital in Western Turkey between 1 September 2020 and 1 March 2021. The mean Family Planning Attitude Scale score of the women was found to be 137.53 ± 27.11. It was observed that, as the mean age of the women increased, their family planning attitudes were more positive, and as their number of pregnancies, abortions and living children increased, their attitudes were more negative (p < 0.05). Women do not want to get pregnant during the pandemic process. This is because the effects of COVID-19 on both themselves and the baby to be born are not known, which worries women. Therefore, in order to transform positive attitudes regarding family planning into behavior, it is recommended to provide effective training and consultancy services during the pandemic period.
AtıfScopus5WoS4OpenAlex11İncele - MakaleAçık Erişim2022Characterization and dye adsorption effectiveness of activated carbon synthesized from olive pomace
Deniz, Fatma; Başgöz, Öyküm; Güler, Ömer; Mazmanci, Mehmet Ali
Studies, about products obtained from agricultural wastes, have increased within the scope of zero waste studies. The olive pomace is produced as a result of olive oil production. In the present study, activated carbon was synthesized using the olive pomace taken from the olive pomace processing plant operating with a three-phase process. The synthesized activated carbon characterization was performed using Scanning Electron Microscope (SEM), Fourier-Transform Infrared Spectroscopy (FT-IR), Brunauer – Emmett – Teller (BET), and X-Ray Crystallography (XRD) devices. Olive pomace activated carbon (OPAC) was used for the adsorption of dye from an aqueous solution. The adsorption efficiency of the OPAC was investigated. The initial pH value of dye solution (6–9), the amount of activated carbon (0.5 and 1.0 g/L), and initial dye concentration (600–1200 mg/L) were optimized. Also, adsorption kinetic and isotherm calculations were evaluated. The optimum parameters were found as the original pH value (pH=8) of dye solutions, OPAC amount of 1.0 g/L and the initial concentration of 1000 mg/L. The Langmuir isotherm model and the pseudo-second-order kinetic model were found as the most suitable models. It can be said that the synthesized material can be used at dye removing from wastewater.
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İncele - MakaleAçık Erişim2023Scopus SJRQ3Investigation of issues affecting thermal comfort in water system underfloor heating applications of buildings with Bayesian networks
Erkol, Samet; Yücesan, Melih; Gül, Muhammet; Güneri, Ali Fuat
Thermal comfort is related to the stability of the ambient temperature. Constant changes in ambient temperature appear as a situation that negatively affects comfort. The selected building systems must be arranged to maintain this stability for the continuity of thermal comfort. In this study, issues affecting thermal comfort in water system underfloor heating applications of buildings are handled and analyzed using the Bayesian Network modeling methodology. Visual examples of the problems encountered in field applications are also given. Three different scenarios are tested with the constructed Bayesian Network model. In the first scenario, assumed that mechanical project failures were prevented. In this case, it was observed that the failure rate decreased by about 5%. In the second scenario, assumed that mechanical application failures are prevented along with mechanical project failures. The failure rate decreased by 11% compared to the first situation. The third scenario assumed that the mechanical project preparation phase was concluded without any problems, the mechanical project was implemented without any failures, and the mechanical system was commissioned without any problems. In the last scenario, the failure rate decreased by 14% compared to the first case, and the probability of not providing thermal comfort remained at 2%. As a result of these three scenarios, the possibility of not providing thermal comfort in the underfloor heating system is detailed and interpreted.
- DüzeltmeYalnız künye2021Scopus SJRQ1Corrigendum to “Influence of partial sodium replacement on proximate composition, physical and sensory quality of marinated anchovy (Engraulis encrasicolus)” [LWT 137 (2021) (February 2021) 110476] (LWT (2021) 137, (S002364382031464X), (10.1016/j.lwt.2020.110476))
Erol, Nida Demirtas; Erdem, Ömer Alper; Cakli, Sukran
The authors regret Arzu Burcu Yavuz who is one of the authors of our article requested to withdraw her name from our article titled “Influence of Partial Sodium Replacement on Proximate Composition, Physical and Sensory Quality of Marinated Anchovy (Engraulis encrasicolus).” As the other authors of the article, we agree with this request and have removed Dr. Burcu from this article. The updated authorship is as listed above. The authors would like to apologise for any inconvenience caused.
AtıfScopus1İncele - MakaleAçık Erişim2022Scopus SJRQ2Assessment of heavy metal accumulations and health risk potentials in tomatoes grown in the discharge area of a municipal wastewater treatment plant
Arslan Topal, E. Işıl; Topal, Murat; Öbek, Erdal
Some heavy metals were detected in organs of the tomatoes grown in the discharge area of effluents of a municipal wastewater treatment plant. Also, the health risk potentials of heavy metals in the tomatoes consumed by human were investigated. The highest concentrations for Cu, Ni, Cr, Mn and Pb were followed the order of root>leaf>stem>fruit. When the bioconcentration factors values calculated for bioconcentration of metals from effluent to stem and root were examined, the highest values were determined for Cu. When translocation factors values are examined, the highest translocation from root to leaf was determined for Cd. The highest translocation from stem to leaf was determined for Pb. The estimated total exposure dose for male, female and children was listed as Zn>Mn>Cu>Cr>Ni>Pb>Cd. In terms of dietary, we can list the non-carcinogenic risks of heavy metals as children> female> male. The highest carcinogenic risk was calculated for Cr via dietary intake.
AtıfScopus17WoS18OpenAlex20İncele - MakaleYalnız künye2022Scopus SJRQ1Experimental and material characterization of composites, including waste iron and marble powder
Gülmez, Nihan
Due to its fine particle size, waste marble slurry originating in cutting and processing units mixes into the air after drying, causing environmental and health problems in nearby areas. On the other hand, large amounts of iron particles are generated as metalworking industry waste, affecting the environmental system. In this study, 0%, 10%, and 20% marble powder (instead of cement) and iron particles (instead of fine aggregate) were used in mixtures, and the composites produced were subjected to two different curing periods: 7 and 28 days. The physical, mechanical, microstructural, and thermal properties of the fresh and hardened composites were ascertained via bulk density, consistency, porosity, water absorption, capillary water absorption, strength tests, particle size distribution, X-ray diffraction (XRF), X-ray fluorescence (XRF), scanning electron microscopy and energy dispersive spectroscopy (SEM–EDS), and thermogravimetric analyses (TGA). The results revealed that minimum water absorption (8.5%) and porosity (19.8%) values were achieved in 28-day composites produced with 10% marble–20% iron wastes among all composites. Thus, iron particles substituted for natural aggregates were mainly responsible for the increase in mechanical performance. A maximum flexural strength of 5.9 MPa and a compressive strength of 26.7 MPa were observed in 28-day composites containing 0% marble–20% iron wastes. Furthermore, capillary water absorption tended to decrease with the substitution of 10% marble powder.
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