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Öğe Affeden Yol Tasarımı ve Kaza Kara Noktalarının İyileştirilmesi; Düzce Örnek Durum İncelemesi(2023) Serin, Sercan; Önal, Yakup; Kayadelen, Cafer; Mutlu, Muhammet FatihBu noktada, trafik kazalarının neden ve sonuçlarını değiştirmek, olası insan ölümlerinin önüne geçmek, daha konforlu seyir güvenliğini sağlamak amacı, özellikle trafik kazalarının sık gerçekleştiği ülkemiz karayolu kesimlerinde olağan bir durum teşkil etmekle birlikte; yapılan çalışma da, ülkemiz gündemine 2013 yılında Karayolları Genel Müdürlüğü tarafından getirilen ve halen uygulama konusunda aksaklıkları bulunan affeden yol kavramı irdelenmiştir. Aynı tip kazaların sık gerçekleştiği kara yolu kesimlerinde incelemeler yapılmış, bu karayolu kesimlerinin nasıl affeden yol olabileceği üzerinde durulmuştur. Doğru ve planlı bir yol tasarımı veya iyileştirmesi, kaza oranlarının büyük ölçüde azalmasına doğrudan katkıda bulunacaktır. Bu kapsamda Karayolları Genel Müdürlüğü tarafından belirlenen, 2016 yılı içerisinde iyileştirilmesi gereken 2 kaza kara noktası ve kaza kara noktası olma potansiyeline sahip 1 nokta belirlenmiştir. Toplam üç karayolu kesimi üzerinde affedici yol tasarım özellikleri göz önünde bulundurularak yerinde incelemeler yapılmış, tavsiyelerde bulunulmuştur.Öğe Comparison of the effect of basalt and glass fibers on the fracture energy of asphalt mixes using semi-circular bending test(Elsevier Sci Ltd, 2023) Serin, Sercan; Onal, Yakup; Emiroglu, Mehmet; Demir, ErenThis paper has focused on the effect of basalt and glass fibers in HMA in terms of crack formation and damage mechanisms. The experimental study was carried out under two stages; i) defining optimum fiber lengths and rates based on Marshall Stability performances using three different fiber lengths (4 mm, 12.5 mm, 22.5 mm) and three different fiber rates (0.75%, 1.00% and 1.5% by weight), ii) examining of fracture tests by using the op-timum fiber values (4 mm fiber length and 0.50%, 0.75%, 1.00% fiber content by weight) obtained from the first stage. Fracture energy characteristics of HMA mixtures were examined via Semi-Circular Bending (SCB) test. A total of 24 SCB test specimens from 6 different series, B-0.50, B-0.75, B-1.00, G-0.50, G-0.75, and G-1.00, were used in the experiments. Experimental results were discussed based on some basic physical properties, fracture energy (Gf), dissipated energy (DE), flexibility index (FI), and crack resistance index (CRI) values of HMA mixtures. When 0.50% basalt fiber is utilized in asphalt mixtures, the maximum peak load and Gf value are achieved. Moreover, using 1.00% basalt and 0.75% glass fiber in asphalt mixtures yielded the highest values of FI and CRI, respectively. Nevertheless, when 1.00% glass and 0.75% basalt fiber were added to asphalt mixtures, the minimum values of FI and CRI were obtained, respectively.Öğe Determining amount of bituminous effects on asphalt concrete strength with artificial intelligence and statistical analysis methods(2011) Serin, Sercan; Morova, Nihat; Terzi, Serdal; Sargın, ŞebnemIn this study, an experimental study has been conducted to determine compressive strength of asphalt concrete. The scope of study by preparing 45 Marshall samples Marshall stability experiment was conducted and compressive strength of asphalt concrete was determined. Compressive strength of asphalt concrete as depending on bituminous amount prediction models were developed by using obtained experiment results. Compressive strength of asphalt concrete values as depending on bituminous amount have been estimated on prediction models developed with regression analyses and Artificial Neural Network (ANN) Methods. Results obtained from models were compared with experiment results. Prediction performances of developed models were evaluated as compared. As a result it was determined that possible to estimate the compressive strength of asphalt concrete as depending on bituminous amount with developed ANN model and that ANN model was more successful than regression model for estimating the compressive strength of asphalt concrete. © 2011 IEEE.Öğe Doğal Kenevir Lifi Kullanımının Asfalt Beton Karışımlara Etkisi(2018) Serin, Sercan; Macit, Mustafa Erdal; Çınar, Eren Can; Çelik, SerkanGünümüzde çeşitli bitkilerin lifli kısımları doğaya atık malzeme olarak terkedilmektedir. Diğer taraftanaraştırmacılar da bu atık malzemelerin yapı malzemesi olarak kullanılabilirliğini araştırmaktadır. Bu çalışmada,doğrudan trafik etkilerine maruz kalan bitümlü sıcak karışım tabakasında meydana gelen gerilmeleri karşılamakiçin kenevir liflerinin kullanılabilirliği araştırılmıştır. Bu amaçla, ilk olarak seçilen üstyapı tipine göre karışımaait agrega tane dağılımı belirlenmiştir. Daha sonra Asfalt Enstitüsü MS-2 Marshall test metodu kullanılarakdeney numuneleri üretilmiş (15 adet) ve karışımın optimum bitüm içeriğini belirlemek için deneyler yapılmıştır.Çalışmanın ikinci aşamasında ise, doğal lif olan kenevir, karışıma altı farklı oranlarda dâhil edilmiştir (%0.05,%0.075, %0.1, %0.125, %0.25). Hazırlanan tüm numunelerin fiziksel ve bazı mekanik özellikleri belirlenmiş vegrafiklerle değerlendirilmiştir. Sonuçlar, kenevir liflerinin, bitümlü sıcak karışımların mekanik özelliklerinigeliştirdiğini göstermiştir. % 0.10 kenevir lifi kullanımının, bitümlü sıcak karışımların Marshall Stabilitesini %40.183 oranında artırdığı tespit edilmiştir.Öğe EFFECTS OF FREEZING AND THAWING CYCLES ON THE ENGINEERING PROPERTIES OF SOILS(Springer, 2015) Özgan, Ercan; Serin, Sercan; Ertürk, S.; Vural, İsaIn this study, particular engineering characteristics of soil exposed to freezing and thawing cycles were investigated. Low plasticity clay (CL) soil samples (classified according to the USCS soil classification system) were sampled in situ, and some basic properties of these soil samples were investigated by performing sieve analyses, hydrometer tests, specific gravity tests, and liquid, plastic, and shrinkage limits tests. The same tests were also conducted after freezing and thawing cycles. Additionally, scanning electron microscope (SEM) tests to determine the microstructures of the soil samples and energy dispersive X-ray-EDX tests to determine the chemical compositions of the samples were performed. Finally, triaxial compression tests were conducted before and after the freezing and thawing cycles to determine the strength parameters of the soil samples. The experimental results show that the physical and mechanical properties of the soil changed significantly after the freezing and thawing cycles.Öğe Effects of Freezing and Thawing on the Consolidation Settlement of Soils(Springer, 2015) Özgan, Ercan; Serin, Sercan; Ertürk, S.; Vural, İsaThe effects of freezing and thawing on consolidation parameters and other properties of soil were investigated experimentally. Samples of soils were collected in-situ and characterized in the laboratory. Index properties of soil samples were determined by conducting sieve analyses, hydrometer tests, specific gravity tests, and liquid limit, plastic limit, and shrinkage limit tests before and after 30 freezing-thawing cycles. Microstructure and elemental composition of the soil samples were determined by scanning electron microscope (SEM) and energy dispersive X-ray (EDX) analysis, respectively. To determine the effects of freezing thawing onto the consolidation parameters of soil, consolidation tests were conducted on the samples before and after the freezing-thawing cycles. After 30 freezing-thawing cycles, consolidation settlements increased by about 23%.Öğe Estimation of specific gravity with penetration and penetration index parameters by artificial neural network(International University of Sarajevo, 2017) Serin, Sercan; Karahançer, Şebnem; Erişkin, Ekinhan; Morova, Nihat; Saltan, Mehmet; Terzi, SerdalSpecific Gravity of the bitumen changes according to the ambient temperature. Different specific gravity values can be calculated at different temperature. Estimating models like Artificial Neural Network - ANN could be very useful to obtain the specific gravity value uniform. Specific gravity values obtained from Long-Term Pavement Performance - LTPP were estimated with artificial neural networks. Penetration and Penetration Index of binder were used for estimating the specific gravity of the bitumen. As a result, ANN get 84% of R2 between obtained and estimated values.Öğe Evaluation of rice husk ash as filler in hot mix asphalt concrete(Elsevier Sci Ltd, 2013) Sargın, Şebnem; Saltan, Mehmet; Morova, Nihat; Serin, Sercan; Terzi, SerdalIn the study, it was investigated to use the rice husk ash (RHA) in the hot mix asphalt as mineral filler. For this purpose, four different serial asphalt concrete samples were produced using limestone (LS) in different proportions (4%, 5%, 6%, and 7%) as mineral filler. The amount of optimum bitumen and the value of Marshall Stability (MS) were determined with MS test for the samples. Choosing the series of asphalt having 5% filler which has given the highest stability RHA was changed with LS filler in the rate of 25%, 50%, 75%, and 100%. After that MS test was conducted on the produced samples and the results were evaluated. As a result, it has come in view that RHA can be used as mineral filler in the asphalt concrete. (C) 2013 Elsevier Ltd. All rights reserved.Öğe Investigation of certain engineering characteristics of asphalt concrete exposed to freeze-thaw cycles(Elsevier Science Bv, 2013) Özgan, Ercan; Serin, SercanIn this study the effects of freeze and thaw cycles on asphalt concrete materials are investigated for binder and wearing surface coats, separately, and for different freeze and thaw cycles. Asphalt concrete (AC) was produced in a laboratory environment, and tests were conducted. Different specimens were prepared with different binders and wearing course based on the calculated pre-optimum bitumen amount, and the optimum bitumen amount was experimentally determined for each layer. According to the value determined for amount of bitumen, 15 AC specimens were prepared for each layer, for a total of 30 specimens. The prepared specimens were exposed to freeze and thaw cycles for 6, 12, 18, and 24 days. Before and after each cycle, the voids ratios filled with asphalt (V-f), void ratio (V-h), and the voids ratios inside mineral aggregate (V-MA) parameters; ultrasonic velocity; and Marshall Stability (MS) values were experimentally determined for each specimen. The results obtained for reference specimens were compared against the values experimentally obtained from the specimens that were exposed to the freeze-thaw effect for 6, 12, 18, and 24 days. (C) 2012 Elsevier B.V. All rights reserved.Öğe Investigation of the fracture energy of hot mixtures asphalt incorporating metallic wastes via semi-circular bending test(Elsevier Sci Ltd, 2021) Serin, Sercan; Emiroglu, Mehmet; Gonul, Veysel EkremIn the study, metallic wastes were evaluated in order to reduce environmental impacts and to contribute fracture energy of HMA mixtures. In this context, aluminum chips and iron powders were included in the mixtures at 0.50%, 1.00%, and 1.50% (by weight of mixtures), and the effect of HMA mixtures on fracture energy was investigated by Semi-Circular Bending (SCB) test. Experiments were performed on a total of 28 SCB test specimens from 7 different series including reference, Al-0.50, Al-1.00, Al-1.50, Fe-0.50, Fe-1.00, Fe-1.50. Basic physical properties, dissipated energy (DE), fracture energy (G(f)), flexibility index (FI), and crack resistance index (CRI) values of HMA specimens were measured and compared. Based on test results, carrying load capacity and G(f) values of the mixtures were increased in the use of waste iron powders. A decrease in G(f) and peak load values were obtained while increasing the aluminum chips ratios. However, with the use of 0.5% waste aluminum chips were contributed G(f), peak load, CRI, and FI values compared by the reference sample. It is concluded that both aluminum chips and iron powders contributed to fracture energy of HMA mixtures. (C) 2021 Elsevier Ltd. All rights reserved.Öğe Investigation of usability of steel fibers in asphalt concrete mixtures(Elsevier Sci Ltd, 2012) Serin, Sercan; Morova, Nihat; Saltan, Mehmet; Terzi, SerdalIn this study, the usability of steel fibers in order to bear the stresses occurring at the surface layer of pavement, which are directly subjected to the traffic effects, was investigated. In this context, specimens were produced and tested under Marshall Stability Test, and the optimum bitumen content value for the aggregates sample to be used was determined. Results showed that based on the determined value for the optimum bitumen content (5.5%), three specimens for each of a series of different fiber rates (0%, 0.25%, 0.50%, 0.75%, 1.0%, 1.5%, 2.0%, 2.5%) were prepared and the optimum value for fiber rate that results in the best stability value was determined as 0.75%. As a result, steel fiber additions can be used in binder course of flexible pavement because of its positive stability impact. Crown Copyright (C) 2012 Published by Elsevier Ltd. All rights reserved.Öğe Marshall Stability Estimating Using Artificial Neural Network with Polyparaphenylene Terephtalamide Fibre Rate(Ieee, 2016) Karahançer, Şebnem; Çapalı, Buket; Erişkin, Ekinhan; Morova, Nihat; Serin, Sercan; Saltan, Mehmet; Küçükçapraz, Dicle ÖzdemirDue to the complex behaviour of asphalt pavement materials under various loading conditions, pavement structure, and environmental conditions, accurately predicting stability of asphalt pavement is difficult. To predict, it is required to find the mathematical relation between the input and output data by an accurate and simple method. In recent years, artificial neural networks (ANNs) have been used to model the properties and behaviour of materials, and to find complex relations between different properties in many fields of civil engineering applications, because of their ability to learn and to adapt. In the present study, laboratory data are obtained from an experimental study that was used to develop an ANN model. For predicting the Marshall Stability value of mixture using ANN models, an appropriate selection of input parameters (neurons) is essential. There are four nodes in the input layer corresponding to four variables: Polyparaphenylene Terephtalamide fibre (PTF) rate, binder rate, flow, volume of the specimen. The result indicates that the proposed model can be applied in predicting Marshall Stability of asphalt mixtures. The model is further applied to evaluate the effect of different rates of Polyparaphenylene Terephtalamide on Marshall Stability.Öğe Modeling Marshall stability of light asphalt concretes fabricated using expanded clay aggregate with artificial neural networks(2012) Morova, Nihat; Karahançer, Şebnem Sargın; Terzi, Serdal; Saltan, Mehmet; Serin, SercanIn this study, an Artificial Neural Network (ANN) model has been developed to estimate Marshall Stability (MS) of lightweight asphalt concrete containing expanded clay. In the model, amount of bitumen (%), transition speed of ultrasound (?s), unit weight (gr/cm 3) were used as inputs and Marshall Stability (kg) was used as output. Developed ANN model results and the experimental results were compared and good relationship was found. © 2012 IEEE.Öğe Multi-faceted investigation and modeling of compaction parameters for road construction(Pergamon-Elsevier Science Ltd, 2015) Özgan, Ercan; Serin, Sercan; Vural, İsaCompaction parameters for road construction were multi-faceted investigated and modeled in this study. For this aim, aggregate samples were randomly taken from D-100/11 highway section in Duzce. Standard Procter tests, sieve analysis, unit weight in natural state (gamma(n)), unit weight in dry state (gamma(d)), water content (w), physical and mechanical properties of aggregate samples were determined by conducting experiments in laboratory. By using SPSS software programme statistical analyses were performed on the experimental test results. Different prediction models were developed for the prediction of maximum gamma(d) based on the compaction parameters and the particle diameter of aggregates. For the maximum gamma(d) the correlation coefficient was found perfect level between developed prediction model and the current compaction test results. In order to determine gamma(d), gamma(n) and w of compacted aggregate samples in field, different prediction models were also developed based on the penetration test results. As a result, the entire relationship between compaction parameters and particle diameter of aggregates were detailed determined and it was also seen that the developed prediction models can be easy used for the prediction of the compaction test parameters. (C) 2015 ISTVS. Published by Elsevier Ltd. All rights reserved.Öğe Multi-faceted investigation into the effects of hot-mix asphalt parameters on Marshall Stability(Elsevier Sci Ltd, 2013) Özgan, Ercan; Serin, Sercan; Kap, TuncayIn the present study, the effect on Marshall Stability (MS) of hot-mix asphalt (HMA) parameters which are the particle diameters of aggregates, quantity of bitumen in the HMA, different environmental temperatures and the exposure times was closely investigated. To this end, a total of 60 Asphalt Core Samples (ACSs) was taken from different sections in the city of Duzce. In the laboratory, MS tests and extraction tests were conducted by using trichloroethylene and an extraction test device. Sieve analyses were carried out on each core sample's aggregates to determine the particle diameters. Also, some of the physical and mechanical properties of aggregates were determined. For the multi-faceted investigation of the effect of HMA parameters on MS, statistical analyses were performed. Within this scope, correlation coefficients have been determined between the MS and HMA parameters, and different prediction models have been developed based on the HMA parameters for MS by using Multi Linear Regression Analysis. As a result, it was determined that some particle diameters of aggregates (0.56 mm, 1 mm, 0.18 mm, etc.) and the quantity of bitumen with 0.43 correlation coefficient increased the MS, the other particle diameter of aggregates (19 mm, 8 mm, 9.5 mm, etc.) and the environmental temperature with -0.83 correlation coefficient decreased the Marshall Stability. (C) 2012 Elsevier Ltd. All rights reserved.Öğe Multi-faceted investigation of the effect of de-icer chemicals on the engineering properties of asphalt concrete(Elsevier Science Bv, 2013) Özgan, Ercan; Serin, Sercan; Gerengi, Hüsnü; Arslan, İlhanCertain engineering properties of asphalt concrete (AC) exposed to pure water and different salt concentrations were investigated both statistically and experimentally with destructive and non-destructive methods. According to the technical specifications of the General Directorate for Turkish Highways, AC samples for wearing layer were produced in laboratory conditions. Corrosive environments were created with pure water and using 1, 3, and 4 M sodium chloride (NaCl), and 1 M calcium chloride (CaCl2). The numbers of 7 AC samples were prepared as reference sample, and 7 AC samples were also prepared for each corrosive environment, so that the number of total prepared AC samples is 42. Certain physical properties of the entire AC samples including reference samples were investigated before the corrosive process. After determining the physical properties of the reference AC samples, Marshall stability (MS) tests were performed and the flow values of the samples were measured at the same time. The other AC samples, except for the reference AC samples, were exposed to these corrosive environments. After completing the experimental test procedure, the obtained data were compared with the references data of the AC samples for each corrosive environment. According to the results of the experimental test; the most important effects on the MS of the AC samples occurred in pure water environment with 15.47% MS lost. The other corrosive environment affects 4 M NaCl with 13.70% MS lost, 3 M NaCl with 11.22%, and 1 M NaCl with 10.28%, respectively. The least effect on the MS of the AC samples occurred in the 1 M CaCl2 with 1.42% MS lost. The relationships between the physical and mechanical properties of the entire AC samples were investigated in detail and the meaningfulness of the entire relationships was determined by using statistical methods for each de-icer material. (C) 2012 Elsevier B.V. All rights reserved.Öğe Planning maintenance works on pavements through ant colony optimization(Springer, 2014) Terzi, Serdal; Serin, SercanPavements constructed for the purpose of meeting the demand of highways which were emerged with the improving technological developments increased. And consequently, more resources were demanded to be directed to pavement maintenance and rehabilitation. Hereby, the concept of pavement management emerged. Although project-level analyses were found adequate previously, network-level evaluations were needed in order to do detailed planning as a result of resource allocation and transfer problems that were emerged later. Therefore, pavement management system has become compulsory for all pavements to be controlled together. In this framework, programming is needed in order to schedule maintenance-rehabilitation and develop costs with respect to budget. In the study carried out, a mode was developed in order to program the routine network maintenance activities in terms of Pavement Maintenance and Management Systems, and it was concluded that this problem can be solved through ant colony, using Visual Basic.Öğe Prediction of the marshall stability of reinforced asphalt concrete with steel fiber using fuzzy logic(Ios Press, 2014) Serin, Sercan; Morova, Nihat; Saltan, Mehmet; Terzi, Serdal; Karaşahin, MustafaIn this study, Marshall Stability (MS) of steel fiber reinforced asphalt concrete has been predicted using steel fiber rate (0%, 0.25%, 0.50%, 0.75%, 1.0%, 1.5%, 2.0% and 2.5%), bitumen content (5%, 5.5% and 6.0%) and unit weights (2,465- 2,515 (gr/cm(3))) by Fuzzy Logic (FL). Results have shown that developed FL model has a strong potential for predicting the MS of asphalt concrete without performing any experimental studies.Öğe Ultrasonik Yöntem İle Asfalt Betonlarda Kontrollü Çentik İle Çatlak Analizi(2018) Serin, SercanBu çalışmada, asfalt betonu kaplamalarda ultrases geçiş hızı test cihazı kullanılarakçatlak derinliği tahmini yapılmıştır. Testler, dolaylı okuma yöntemi kullanılarakgerçekleştirilmiştir. Deneysel işlemlerde kontrollü çatlak oluşumunu elde etmekamacıyla, numunelere elmas testere yardımıyla farklı derinliklerde çentikleraçılmıştır. Böylece çentiksiz ve 5, 10, 15, 20 cm derinliklerde çentikli numunegrupları oluşturulmuştur. Deneysel veriler kullanılarak literatürde bulunan veçatlak tahmininde kullanılan ampirik formüle ek olarak, bu çalışmada malzemeninfiziksel özelliklerinin analize dahil edildiği yeni istatistiksel modeller geliştirilmiştir.Geliştirilen bu modeller ile sonuçlar, çentiksiz numunelerin analize dahil edildiği vedahil edilmediği olmak üzere iki ayrı grupta incelenmiştir. Böylece, her iki modeldegerçek değerler ile tahmin edilen değerler arasındaki determinasyon katsayıları(R2) sırasıyla 0,95 ve 0,91 olarak elde edilmiştir. Sonuç olarak, asfalt betonukaplamalarda çatlak derinliğinin önerilen model ile başarılı bir şekilde tahminedilebileceği tespit edilmiştir.Öğe Utility of polyparaphenylene terephtalamide fiber in hot mix asphalt as a fiber(Elsevier Sci Ltd, 2016) Morova, Nihat; Serin, Sercan; Terzi, Serdal; Saltan, Mehmet; Küçükçapraz, D. Özdemir; Karahançer, Şebnem Sargın; Erişkin, EkinhanIn this study, utility of polyparaphenylene terephtalamide (PT) was investigated in hot mix asphalt as a fiber. For this aim samples were prepared with limestone aggregate at different proportions. Marshall Stability test was applied and optimum bitumen content was determined. In the second stage of the study, new samples were prepared using different polyparaphenylene terephtalamide fiber (PTF) rates of 0.25%, 0.50%, 0.75%, 1.00%, 1.50%, 2.00% based on optimum bitumen content. When examining test results, samples which prepared using 0.25% PTF rate gave highest Marshall Stability result. At the final stage of the study, different bitumen contents (4.15%, 4.65% and 5.15%) were conducted for the best fiber rate (0.25%) and close to this result (0.50% and 0.75%). Thus, the effect of bitumen content on determined fiber rate at the second stage of the study was investigated. Also Indirect Tensile (IDT) Strength Test was performed on hot mix asphalt (HMA) samples preparing at 0.25%, 0.50% and 0.75% fiber rates and moisture sensitivities were determined. All results showed that, the best fiber rate was 0.25% and determined optimum bitumen content remain constant with the fiber additive for the reference samples. Besides, some sample groups which prepared using different PTF rates proved the specification limits and it was said that; PTF can be used in asphalt concrete as a fiber additive. (c) 2015 Elsevier Ltd. All rights reserved.