Kemal Armagan | Karamanoglu Mehmetbey University (original) (raw)
Papers by Kemal Armagan
Lecture notes in civil engineering, 2020
Mechanistic-Empirical Pavement Design Method (MEPDM) determines the necessary pavement thickness ... more Mechanistic-Empirical Pavement Design Method (MEPDM) determines the necessary pavement thickness for given design inputs and deformations in pavement by combining the parameters of mechanical modeling and observations of pavement performance through the pavement design life. To examine various distresses including cracking, rutting and roughness in MEPDM, pavement dynamic modulus (E*) which is a function of age, temperature, rate of loading, and mixture properties, such as aggregate air voids, gradation, binder stiffness and binder content needs to be determined. For this, there are three levels of analysis in MEPDM. In Level 3, there is no need for laboratory tests, and there are prediction models to assign the dynamic modulus. These models can implement time-dependent analysis of pavement. In this study, statistical climate data analysis of 20 years including 1995–2014 period of Isparta province was examined. Then, the prediction models were used to determine the dynamic modulus master curves of Isparta state highways, and these master curves were compared.
Journal of Innovative Transportation, Jul 15, 2021
Information In pavement design and analysis processes among mechanistic-empirical pavement design... more Information In pavement design and analysis processes among mechanistic-empirical pavement design method, defining the Dynamic Elasticity Modulus(E*) of asphalt layers are very important. In analysis processes, predicting the deteriorations and E* requires some special devices and a lot of time. To simplify this process different prediction models and different approaches have been developed to predict E*. These prediction approaches prepared with huge amount of input data gathered both from construction site and laboratory tests to predict the binder and the volumetric properties of the HMA. In this paper four prediction equations have been applied to predict E* and compared the results with each other. The infrastructure model has chosen as an existing highway section with known HMA material properties. The analyses have done for five different temperatures (10⁰F, 40⁰F, 70⁰F, 100⁰F and 130⁰F) by using two different frequency values (4Hz and 10 Hz). The aim of this research study is doing a comparative assessment of four widely used E* prediction models. Results have shown a large bias between compared E*prediction results due to temperature, frequency, and material properties. Higher Frequency and newest models have shown higher E* values.
Springer eBooks, 2020
In this study, the usability of expanded glass (EG) in hot-mix asphalt (HMA) as the fine material... more In this study, the usability of expanded glass (EG) in hot-mix asphalt (HMA) as the fine material is investigated. Firstly, standard tests on the EG have been done to determine the basic properties. Next, optimum binder content and aggregate gradation are determined in accordance with Superpave volumetric mix design. The EG is substituted into the HMA as a fine aggregate (in accordance with the original size) in four different rates (25, 50, 75 and 100%). Optimum binder content for each EG ratio is determined. The Superpave gyratory compactor is used for the compaction of the specimens. Prepared specimens have been tested for the indirect tensile strength and tensile strength ratio.
Journal of Innovative Transportation, Jul 15, 2020
• Hyperloop as the fifth mode • New transportation opportunities are still undiscovered • High ve... more • Hyperloop as the fifth mode • New transportation opportunities are still undiscovered • High velocities in transportation
Construction and Building Materials, 2020
h i g h l i g h t s Waste rose pulp has been reused after pyrolysis process. Mixing and compactio... more h i g h l i g h t s Waste rose pulp has been reused after pyrolysis process. Mixing and compaction temperature are reduced up to 8°C. Neat bitumen ratio is decreased up to 2.4%. Strength value is increased up to 4.1%.
European Journal of Science and Technology, 2019
Öz Titreşimler yani; ses dalgaları, belirli bir süre içinde belirli sayıda tekrar eden dalgalardı... more Öz Titreşimler yani; ses dalgaları, belirli bir süre içinde belirli sayıda tekrar eden dalgalardır. Ses dalgalarından farkı, sesin hava yoluyla iletilmesidir, titreşim ise vücudun katı kısımlarını kullanır. Titreşimler, operatörlerin el ve kollarına ve hatta tüm yapılarına bina operasyonlarında kullanılan makine ve ekipmanlardan geçer. Titreşimler birçok rahatsızlığa neden olur. Özellikle inşaat sektöründe, yüksek frekanslı titreşim yayıcı makina ve ekipmanlarda çalışan işçilerde ciddi sağlık sorunları gözlenmektedir. Bu sağlık sorunlarından en yaygın olanı orta ve uzun vadede ciddi mesleki ve bazı sağlık sorunlarına neden olan titreşimli bir sendromdur. Titreşim sendromu hastaları özellikle inşaat işlerinde fonksiyonel, sosyal ve psikolojik sakatlık yaşarlar. Bu nedenle, bu mesleklerin sigortaları ve amortismanları diğer çalışanlardan farklı olmalıdır. Bu çalışmada inşaat işçilerinin titreşim sendromu risk sınıflamaları yapılmıştır. Sıkı kavanoz açma zorluğu, el kavrama zayıflığı ve parmak rengi değişiklikleri çalışanların genel sorunları arasında öne çıkmaktadır. Ankete göre parmak soğukluğu ve parmak uyuşukluğu daha az ortaya çıkmaktadır. Bu sonuca göre gerekli önlemler ve yasal mevzuat önerileri sunuldu. Titreşime maruz kalan inşaat işçilerinin emeklilik yaşı için Taguchi metoduna dayalı bir optimizasyon yapıldı. İnşaat işçilerinin çalışma sürelerinin analiz sonuçlarına göre yeniden incelenmesi gerektiği sonucuna varılmıştır. İlgili mevzuat, her meslek için önerilen emeklilik yaşı uyarınca güncel tutulabilir.
European Journal of Science and Technology, 2019
Özet Yollar, sosyal faydalarla birlikte, bir toplumda ekonomik kalkınmaya ve büyümeye katkıda bul... more Özet Yollar, sosyal faydalarla birlikte, bir toplumda ekonomik kalkınmaya ve büyümeye katkıda bulunmada önemli bir rol oynar. Bu nedenle, bir ülkenin gelişmesinde hayati rolü bulunmaktadır. Dünyada karayolu uzunluğu 16,3 milyon Km olsa da her ülkeye bağlı olarak, yeni inşaat ve bakım ihtiyacı her zaman bir zorunluluktur. Öte yandan, küresel değişimler, asfalt endüstrisinin muaf olmadığı, sürdürülebilirlik çerçevesi içinde faaliyet göstermesi için tüm sektörleri baskı altında tutuyor. Bu nedenle karar vericiler atmosferi, insan sağlığını ve rahatlığını korumak için günlük düzenlemeler yapıyorlar. Bu koşullar altında, hükümetler ve akademisyenleri de içeren karayolu endüstrisinin tüm paydaşları, teknik iyileştirmeler ile düşük maliyetli, çevre ve insan sağlığı çözümleri arasındaki dengeyi sağlayarak, korumayı teşvik eden yeni teknikler ve materyaller aramaktadır. Herhangi bir "doğru" ürün, üretim, teknik, tesis, fon kullanımının değeri, bu bağlamda her paydaş için giderek daha önemli hale gelmektedir. Bu çalışmada yol kaplamalarındaki yeni teknolojik gelişmeler dikkate alınarak, sürdürülebilirlik bakımından değerlendirilmiştir.
Challenge Journal of Concrete Research Letters, 2019
The purpose of this paper is to investigate the benefits of using steel slag as an additive in Ro... more The purpose of this paper is to investigate the benefits of using steel slag as an additive in Roller Compacted Concrete (RCC) which is a promising material can be used in streets, local roads, residential streets, high-volume roads, industrial access roads, airports...etc. The mechanical performances of steel scrap added reinforced cementitious composites produced with an industrial punch scrap. In specimen mixtures two types of scraps with diameters of 5 mm and 7 mm were used. The additive was mixed with 1%, 1.5% and 2% ratios by weight. Due to the results of the study, it was obtained that flexural strength properties of the specimens have increased up to 11%. In addition, freeze thaw effect of the specimens was investigated and found that 2% percent of scrap usage was given the best results.
Journal of Innovative Transportation, Dec 15, 2022
Information Transportation has a very wide effects either economic or social on human life. Milli... more Information Transportation has a very wide effects either economic or social on human life. Millions of people are also working directly or indirectly for this industry. So, it is a mandatory for governments to evaluate their aspects on transportation construction, management, control and maintenance by increasing mobility. Also new technological developments and researches caused some changes in the expectations at many fields by new design and management approaches. The European Commission have supported some researches within Horizon 2020 program for new innovations to develop a highly efficient and effective cross modal transportation. In this paper recent developments at FOX (Forever Open Infrastructure Across all Transport Modes) program seeks to develop general methods for all transport modes and FOR (Forever Open Roads) program have reviewed. There are also benefits of FOR program that developed by Forum of European National Highway Research Laboratories (FEHRL) have mentioned and the outcome elements as automated, autonomous and resilient roads of the program have described.
Information In pavement design and analysis processes among mechanistic-empirical pavement design... more Information In pavement design and analysis processes among mechanistic-empirical pavement design method, defining the Dynamic Elasticity Modulus(E*) of asphalt layers are very important. In analysis processes, predicting the deteriorations and E* requires some special devices and a lot of time. To simplify this process different prediction models and different approaches have been developed to predict E*. These prediction approaches prepared with huge amount of input data gathered both from construction site and laboratory tests to predict the binder and the volumetric properties of the HMA. In this paper four prediction equations have been applied to predict E* and compared the results with each other. The infrastructure model has chosen as an existing highway section with known HMA material properties. The analyses have done for five different temperatures (10⁰F, 40⁰F, 70⁰F, 100⁰F and 130⁰F) by using two different frequency values (4Hz and 10 Hz). The aim of this research study is doing a comparative assessment of four widely used E* prediction models. Results have shown a large bias between compared E*prediction results due to temperature, frequency, and material properties. Higher Frequency and newest models have shown higher E* values.
In this study, the usability of garnet in hot mix asphalt (HMA) as the filler material is investi... more In this study, the usability of garnet in hot mix asphalt (HMA) as the filler material is investigated. Therefore, the garnet material is sieved through 75 µm. Obtained garnet dust is substituted into hot mix asphalt (HMA) mixture as filler material in four different rates (25, 50, 75 and 100%). Optimum binder rates and the gradation are determined in accordance with the Superpave volumetric mix design procedure. After the determination of optimum binder rate for each different garnet rate, the mixtures have compacted using Superpave gyratory compactor. Indirect tensile strength values and the tensile strength ratios have been obtained in accordance with AASHTO T 283 test procedure.
Lecture Notes in Civil Engineering
Mechanistic-Empirical Pavement Design Method (MEPDM) determines the necessary pavement thickness ... more Mechanistic-Empirical Pavement Design Method (MEPDM) determines the necessary pavement thickness for given design inputs and deformations in pavement by combining the parameters of mechanical modeling and observations of pavement performance through the pavement design life. To examine various distresses including cracking, rutting and roughness in MEPDM, pavement dynamic modulus (E*) which is a function of age, temperature, rate of loading, and mixture properties, such as aggregate air voids, gradation, binder stiffness and binder content needs to be determined. For this, there are three levels of analysis in MEPDM. In Level 3, there is no need for laboratory tests, and there are prediction models to assign the dynamic modulus. These models can implement time-dependent analysis of pavement. In this study, statistical climate data analysis of 20 years including 1995–2014 period of Isparta province was examined. Then, the prediction models were used to determine the dynamic modulus master curves of Isparta state highways, and these master curves were compared.
In this study, the usability of expanded glass (EG) in hot-mix asphalt (HMA) as the fine material... more In this study, the usability of expanded glass (EG) in hot-mix asphalt (HMA) as the fine material is investigated. Firstly, standard tests on the EG have been done to determine the basic properties. Next, optimum binder content and aggregate gradation are determined in accordance with Superpave volumetric mix design. The EG is substituted into the HMA as a fine aggregate (in accordance with the original size) in four different rates (25, 50, 75 and 100%). Optimum binder content for each EG ratio is determined. The Superpave gyratory compactor is used for the compaction of the specimens. Prepared specimens have been tested for the indirect tensile strength and tensile strength ratio.
Road and Rail Infrastructure V
The number of heavy vehicles on traffic and traffic volume are extremely increasing nowadays. Con... more The number of heavy vehicles on traffic and traffic volume are extremely increasing nowadays. Consequently, maintenance costs are increasing too. So, durability becomes necessary in asphalt pavement design and construction. For this purpose, asphalt industry partners are investigating innovative technologies and additives for Hot Mix Asphalt (HMA) Pavements. In this study, the utility of Polyamide 6.6, which is a synthetically produced flexible and highly thermoplastic material that have good mechanical and physical properties in terms within the nylon species, was investigated in HMA as a fiber. For examining the test results, specimens were prepared in four different proportions including reference specimens. Volumetric mix design was used to determine the optimum bitumen content. Then Indirect Tensile Strength (ITS) Test was applied to HMA specimens. The aim of this research was to identify the usability of Polyamide 6.6 in HMA mixtures as a fiber, and the engineering properties ...
Concrete is a widely used material all over the world. Conventional concrete production contains ... more Concrete is a widely used material all over the world. Conventional concrete production contains water, cement, coarse and fine aggregate. Concrete production process has many developments owing to needs on building industry. These developments in concrete are generally classified as high strength, ductility, impermeability. In conventional concrete, optimization of concrete strength is easy with linear and nonlinear regression models. However, the contribution of admixtures in concrete such as super plasticizer, glass powder and all kind of fiber make complicate to predict compressive strength. In this study, the effect of glass powder (GP), super plasticizer and spread diameter effect on the compressive strength optimization of GP added concrete mixes. %10, 15 and 20 of (% wt.) GP was added into the concrete mixes by weight of cement. Concrete compressive strength results were obtained for 80 different mixes. These results were used to optimize the compressive strength of specimen...
Lecture notes in civil engineering, 2020
Mechanistic-Empirical Pavement Design Method (MEPDM) determines the necessary pavement thickness ... more Mechanistic-Empirical Pavement Design Method (MEPDM) determines the necessary pavement thickness for given design inputs and deformations in pavement by combining the parameters of mechanical modeling and observations of pavement performance through the pavement design life. To examine various distresses including cracking, rutting and roughness in MEPDM, pavement dynamic modulus (E*) which is a function of age, temperature, rate of loading, and mixture properties, such as aggregate air voids, gradation, binder stiffness and binder content needs to be determined. For this, there are three levels of analysis in MEPDM. In Level 3, there is no need for laboratory tests, and there are prediction models to assign the dynamic modulus. These models can implement time-dependent analysis of pavement. In this study, statistical climate data analysis of 20 years including 1995–2014 period of Isparta province was examined. Then, the prediction models were used to determine the dynamic modulus master curves of Isparta state highways, and these master curves were compared.
Journal of Innovative Transportation, Jul 15, 2021
Information In pavement design and analysis processes among mechanistic-empirical pavement design... more Information In pavement design and analysis processes among mechanistic-empirical pavement design method, defining the Dynamic Elasticity Modulus(E*) of asphalt layers are very important. In analysis processes, predicting the deteriorations and E* requires some special devices and a lot of time. To simplify this process different prediction models and different approaches have been developed to predict E*. These prediction approaches prepared with huge amount of input data gathered both from construction site and laboratory tests to predict the binder and the volumetric properties of the HMA. In this paper four prediction equations have been applied to predict E* and compared the results with each other. The infrastructure model has chosen as an existing highway section with known HMA material properties. The analyses have done for five different temperatures (10⁰F, 40⁰F, 70⁰F, 100⁰F and 130⁰F) by using two different frequency values (4Hz and 10 Hz). The aim of this research study is doing a comparative assessment of four widely used E* prediction models. Results have shown a large bias between compared E*prediction results due to temperature, frequency, and material properties. Higher Frequency and newest models have shown higher E* values.
Springer eBooks, 2020
In this study, the usability of expanded glass (EG) in hot-mix asphalt (HMA) as the fine material... more In this study, the usability of expanded glass (EG) in hot-mix asphalt (HMA) as the fine material is investigated. Firstly, standard tests on the EG have been done to determine the basic properties. Next, optimum binder content and aggregate gradation are determined in accordance with Superpave volumetric mix design. The EG is substituted into the HMA as a fine aggregate (in accordance with the original size) in four different rates (25, 50, 75 and 100%). Optimum binder content for each EG ratio is determined. The Superpave gyratory compactor is used for the compaction of the specimens. Prepared specimens have been tested for the indirect tensile strength and tensile strength ratio.
Journal of Innovative Transportation, Jul 15, 2020
• Hyperloop as the fifth mode • New transportation opportunities are still undiscovered • High ve... more • Hyperloop as the fifth mode • New transportation opportunities are still undiscovered • High velocities in transportation
Construction and Building Materials, 2020
h i g h l i g h t s Waste rose pulp has been reused after pyrolysis process. Mixing and compactio... more h i g h l i g h t s Waste rose pulp has been reused after pyrolysis process. Mixing and compaction temperature are reduced up to 8°C. Neat bitumen ratio is decreased up to 2.4%. Strength value is increased up to 4.1%.
European Journal of Science and Technology, 2019
Öz Titreşimler yani; ses dalgaları, belirli bir süre içinde belirli sayıda tekrar eden dalgalardı... more Öz Titreşimler yani; ses dalgaları, belirli bir süre içinde belirli sayıda tekrar eden dalgalardır. Ses dalgalarından farkı, sesin hava yoluyla iletilmesidir, titreşim ise vücudun katı kısımlarını kullanır. Titreşimler, operatörlerin el ve kollarına ve hatta tüm yapılarına bina operasyonlarında kullanılan makine ve ekipmanlardan geçer. Titreşimler birçok rahatsızlığa neden olur. Özellikle inşaat sektöründe, yüksek frekanslı titreşim yayıcı makina ve ekipmanlarda çalışan işçilerde ciddi sağlık sorunları gözlenmektedir. Bu sağlık sorunlarından en yaygın olanı orta ve uzun vadede ciddi mesleki ve bazı sağlık sorunlarına neden olan titreşimli bir sendromdur. Titreşim sendromu hastaları özellikle inşaat işlerinde fonksiyonel, sosyal ve psikolojik sakatlık yaşarlar. Bu nedenle, bu mesleklerin sigortaları ve amortismanları diğer çalışanlardan farklı olmalıdır. Bu çalışmada inşaat işçilerinin titreşim sendromu risk sınıflamaları yapılmıştır. Sıkı kavanoz açma zorluğu, el kavrama zayıflığı ve parmak rengi değişiklikleri çalışanların genel sorunları arasında öne çıkmaktadır. Ankete göre parmak soğukluğu ve parmak uyuşukluğu daha az ortaya çıkmaktadır. Bu sonuca göre gerekli önlemler ve yasal mevzuat önerileri sunuldu. Titreşime maruz kalan inşaat işçilerinin emeklilik yaşı için Taguchi metoduna dayalı bir optimizasyon yapıldı. İnşaat işçilerinin çalışma sürelerinin analiz sonuçlarına göre yeniden incelenmesi gerektiği sonucuna varılmıştır. İlgili mevzuat, her meslek için önerilen emeklilik yaşı uyarınca güncel tutulabilir.
European Journal of Science and Technology, 2019
Özet Yollar, sosyal faydalarla birlikte, bir toplumda ekonomik kalkınmaya ve büyümeye katkıda bul... more Özet Yollar, sosyal faydalarla birlikte, bir toplumda ekonomik kalkınmaya ve büyümeye katkıda bulunmada önemli bir rol oynar. Bu nedenle, bir ülkenin gelişmesinde hayati rolü bulunmaktadır. Dünyada karayolu uzunluğu 16,3 milyon Km olsa da her ülkeye bağlı olarak, yeni inşaat ve bakım ihtiyacı her zaman bir zorunluluktur. Öte yandan, küresel değişimler, asfalt endüstrisinin muaf olmadığı, sürdürülebilirlik çerçevesi içinde faaliyet göstermesi için tüm sektörleri baskı altında tutuyor. Bu nedenle karar vericiler atmosferi, insan sağlığını ve rahatlığını korumak için günlük düzenlemeler yapıyorlar. Bu koşullar altında, hükümetler ve akademisyenleri de içeren karayolu endüstrisinin tüm paydaşları, teknik iyileştirmeler ile düşük maliyetli, çevre ve insan sağlığı çözümleri arasındaki dengeyi sağlayarak, korumayı teşvik eden yeni teknikler ve materyaller aramaktadır. Herhangi bir "doğru" ürün, üretim, teknik, tesis, fon kullanımının değeri, bu bağlamda her paydaş için giderek daha önemli hale gelmektedir. Bu çalışmada yol kaplamalarındaki yeni teknolojik gelişmeler dikkate alınarak, sürdürülebilirlik bakımından değerlendirilmiştir.
Challenge Journal of Concrete Research Letters, 2019
The purpose of this paper is to investigate the benefits of using steel slag as an additive in Ro... more The purpose of this paper is to investigate the benefits of using steel slag as an additive in Roller Compacted Concrete (RCC) which is a promising material can be used in streets, local roads, residential streets, high-volume roads, industrial access roads, airports...etc. The mechanical performances of steel scrap added reinforced cementitious composites produced with an industrial punch scrap. In specimen mixtures two types of scraps with diameters of 5 mm and 7 mm were used. The additive was mixed with 1%, 1.5% and 2% ratios by weight. Due to the results of the study, it was obtained that flexural strength properties of the specimens have increased up to 11%. In addition, freeze thaw effect of the specimens was investigated and found that 2% percent of scrap usage was given the best results.
Journal of Innovative Transportation, Dec 15, 2022
Information Transportation has a very wide effects either economic or social on human life. Milli... more Information Transportation has a very wide effects either economic or social on human life. Millions of people are also working directly or indirectly for this industry. So, it is a mandatory for governments to evaluate their aspects on transportation construction, management, control and maintenance by increasing mobility. Also new technological developments and researches caused some changes in the expectations at many fields by new design and management approaches. The European Commission have supported some researches within Horizon 2020 program for new innovations to develop a highly efficient and effective cross modal transportation. In this paper recent developments at FOX (Forever Open Infrastructure Across all Transport Modes) program seeks to develop general methods for all transport modes and FOR (Forever Open Roads) program have reviewed. There are also benefits of FOR program that developed by Forum of European National Highway Research Laboratories (FEHRL) have mentioned and the outcome elements as automated, autonomous and resilient roads of the program have described.
Information In pavement design and analysis processes among mechanistic-empirical pavement design... more Information In pavement design and analysis processes among mechanistic-empirical pavement design method, defining the Dynamic Elasticity Modulus(E*) of asphalt layers are very important. In analysis processes, predicting the deteriorations and E* requires some special devices and a lot of time. To simplify this process different prediction models and different approaches have been developed to predict E*. These prediction approaches prepared with huge amount of input data gathered both from construction site and laboratory tests to predict the binder and the volumetric properties of the HMA. In this paper four prediction equations have been applied to predict E* and compared the results with each other. The infrastructure model has chosen as an existing highway section with known HMA material properties. The analyses have done for five different temperatures (10⁰F, 40⁰F, 70⁰F, 100⁰F and 130⁰F) by using two different frequency values (4Hz and 10 Hz). The aim of this research study is doing a comparative assessment of four widely used E* prediction models. Results have shown a large bias between compared E*prediction results due to temperature, frequency, and material properties. Higher Frequency and newest models have shown higher E* values.
In this study, the usability of garnet in hot mix asphalt (HMA) as the filler material is investi... more In this study, the usability of garnet in hot mix asphalt (HMA) as the filler material is investigated. Therefore, the garnet material is sieved through 75 µm. Obtained garnet dust is substituted into hot mix asphalt (HMA) mixture as filler material in four different rates (25, 50, 75 and 100%). Optimum binder rates and the gradation are determined in accordance with the Superpave volumetric mix design procedure. After the determination of optimum binder rate for each different garnet rate, the mixtures have compacted using Superpave gyratory compactor. Indirect tensile strength values and the tensile strength ratios have been obtained in accordance with AASHTO T 283 test procedure.
Lecture Notes in Civil Engineering
Mechanistic-Empirical Pavement Design Method (MEPDM) determines the necessary pavement thickness ... more Mechanistic-Empirical Pavement Design Method (MEPDM) determines the necessary pavement thickness for given design inputs and deformations in pavement by combining the parameters of mechanical modeling and observations of pavement performance through the pavement design life. To examine various distresses including cracking, rutting and roughness in MEPDM, pavement dynamic modulus (E*) which is a function of age, temperature, rate of loading, and mixture properties, such as aggregate air voids, gradation, binder stiffness and binder content needs to be determined. For this, there are three levels of analysis in MEPDM. In Level 3, there is no need for laboratory tests, and there are prediction models to assign the dynamic modulus. These models can implement time-dependent analysis of pavement. In this study, statistical climate data analysis of 20 years including 1995–2014 period of Isparta province was examined. Then, the prediction models were used to determine the dynamic modulus master curves of Isparta state highways, and these master curves were compared.
In this study, the usability of expanded glass (EG) in hot-mix asphalt (HMA) as the fine material... more In this study, the usability of expanded glass (EG) in hot-mix asphalt (HMA) as the fine material is investigated. Firstly, standard tests on the EG have been done to determine the basic properties. Next, optimum binder content and aggregate gradation are determined in accordance with Superpave volumetric mix design. The EG is substituted into the HMA as a fine aggregate (in accordance with the original size) in four different rates (25, 50, 75 and 100%). Optimum binder content for each EG ratio is determined. The Superpave gyratory compactor is used for the compaction of the specimens. Prepared specimens have been tested for the indirect tensile strength and tensile strength ratio.
Road and Rail Infrastructure V
The number of heavy vehicles on traffic and traffic volume are extremely increasing nowadays. Con... more The number of heavy vehicles on traffic and traffic volume are extremely increasing nowadays. Consequently, maintenance costs are increasing too. So, durability becomes necessary in asphalt pavement design and construction. For this purpose, asphalt industry partners are investigating innovative technologies and additives for Hot Mix Asphalt (HMA) Pavements. In this study, the utility of Polyamide 6.6, which is a synthetically produced flexible and highly thermoplastic material that have good mechanical and physical properties in terms within the nylon species, was investigated in HMA as a fiber. For examining the test results, specimens were prepared in four different proportions including reference specimens. Volumetric mix design was used to determine the optimum bitumen content. Then Indirect Tensile Strength (ITS) Test was applied to HMA specimens. The aim of this research was to identify the usability of Polyamide 6.6 in HMA mixtures as a fiber, and the engineering properties ...
Concrete is a widely used material all over the world. Conventional concrete production contains ... more Concrete is a widely used material all over the world. Conventional concrete production contains water, cement, coarse and fine aggregate. Concrete production process has many developments owing to needs on building industry. These developments in concrete are generally classified as high strength, ductility, impermeability. In conventional concrete, optimization of concrete strength is easy with linear and nonlinear regression models. However, the contribution of admixtures in concrete such as super plasticizer, glass powder and all kind of fiber make complicate to predict compressive strength. In this study, the effect of glass powder (GP), super plasticizer and spread diameter effect on the compressive strength optimization of GP added concrete mixes. %10, 15 and 20 of (% wt.) GP was added into the concrete mixes by weight of cement. Concrete compressive strength results were obtained for 80 different mixes. These results were used to optimize the compressive strength of specimen...