ANFIS ve Bulanık Mantık Yöntemlerinin Köpük Bitümün Genleşme Oranı ve Yarılanma Süresi Parametreleri Tahmininde Kullanılabilirliğinin Araştırılması

Teknolojik gelişmeler sayesinde asfalt üretim sıcaklıkları düşürülerek sıcak karışımlara benzer performanslı karışımlar elde edilebilmektedir. Sıcak karışım asfaltların malzemelerinin yani agrega ve bitümün yüksek sıcaklıklarda ısıtılması nedeniyle yarattıkları olumsuz çevresel etkiler, üretim maliyetlerinde meydana gelen sürekli artış ve hammadde kaynaklarındaki azalma nedenleriyle asfalt üretim sıcaklıklarının düşürülmesi eğilimi ve malzemelerin geri kazanımının popülerliği giderek artmaktadır.Köpük bitüm ve geri kazanılmış/doğal agrega kullanılarak uygulanan köpük bitümle geri kazanım yöntemi, çevresel ve ekonomik olarak avantajları olan bir yöntemdir. Köpük bitümle uygun bir karışım hazırlayabilmek için ilk aşama, karışımda kullanılacak bitümün en ideal köpürme özelliklerinin (genleşme oranı ve yarılanma süresi) doğru şekilde belirlenebilmesidir. Bu nedenle çalışmada, farklı asfalt çimentolarının köpürme özellikleri deneysel olarak belirlenmiştir. Ayrıca deneylerde kullanılan bitümlerin köpürme özellikleri Bulanık Mantık ve ANFIS yöntemleri kullanılarak modellenmiş ve sonuçlar deneysel olarak elde edilen verilerle kıyaslanmıştır.Elde edilen veriler ışığında kullanılan tüm bitümlerin farklı köpürtme su yüzdeleri için kullanımlarının literatürde önerilen minimum köpürme özelliklerini sağladığı ve kullanılan tahminleme yöntemlerinin benzer sonuçlarla deneysel verileri desteklediği sonucuna ulaşılmıştır

The investigation of polyamide fiber as an additive in hma

5th International Conference on Road and Rail Infrastructure (CETRA)-- MAY 17-19, 2018 -- Zadar, CROATIAWOS:000518218300049The 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 of the specimens with Polyamide 6.6 fiber.Univ Zagreb, Univ Zagreb, Fac Civil Engn, Dept Transportat Engn, Croatian Acad Engn, Minist Sci & Educ, Minist Sea, Transport & Infrastructure, Minist Construct & Phys Planning, Int Road Federat, Forum European Natl Highway Res Labs, Geobrugg AG, Monterra d o o, Siemens d d, Beton Lucko d o o, Nin Saltwork

Bitumen expanding using bio-oil product of rose pulp's pyrolysis process

WOS:000535925900030Within the study, the usability of rose pulp, which is the common waste of many industrial products produced by using rose, was examined as bitumen modification material. In order to investigate this possibility and potential benefits, waste rose pulp was subjected to the pyrolysis process to obtain the biochar, bio-oil and biogas. Since it has a viscous liquid form, the bio-oil product has been selected to modify the bitumen for this study. Supplied wet rose pulp was first dried until the water content decreases to around 10%. Afterwards, the dried rose pulp subjected to pyrolysis process for one hour at 450 degrees C after 30 min heating period. Used neat bitumen's grade was PG 64-22. Bio-oil product has been mixed 2 and 4% by weight into the bitumen at 160 degrees C for 30 min. After the modification process, bitumen performance tests have been done. Because of the analysis, it was concluded that modification did not change the bitumen grade, reduced the mixing and compaction temperature up to 8 degrees C and so saving energy. In addition, the modification increases the optimum bitumen ratio up to 5%, strength value up to 4.1%, tensile strength ratio (TSR) value up to 2.3%, and the wheel tracking depth up to 95.2% but still remains within the Hamburg wheel tracking test specification limits. (C) 2020 Elsevier Ltd. All rights reserved

Usability of hemp fiber in dense graded hot mix asphalt mixture

5th International Conference on Road and Rail Infrastructure (CETRA)-- MAY 17-19, 2018 -- Zadar, CROATIAWOS:000518218300052The usage of fibers as an additive to reinforce the paving material have a long history like decades in the World. In stone matrix, open graded or porous mixtures, these fibers were commonly used to increase the adhesion between aggregate and binder and this property was usable in asphalt mixture for preventing the drain down of binder. Also, fibers were used for improving crack resistance and increasing stability in dense graded asphalt mixtures too. As, the aphalt is generally acknowledged as a strong material for compression loads and weak for tension loads. In theory, fibers that have high tensile strength can reduce the stresses relatively to weak asphalt mixtures by transferring the stresses for increasing the tensile strength of the mixture. For investigating the efficiency of the fibers there have been many types and forms of fibers used either experimentally or routinely in asphalt mixtures. These investigations leaded researchers to the plant-based fibers like woody (such as jute, flax, straw, and hemp), leaves and seeds. For this aim the usability of hemp fiber examined in this study. 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 (IDT) Strength Test was applied to HMA specimens.Univ Zagreb, Univ Zagreb, Fac Civil Engn, Dept Transportat Engn, Croatian Acad Engn, Minist Sci & Educ, Minist Sea, Transport & Infrastructure, Minist Construct & Phys Planning, Int Road Federat, Forum European Natl Highway Res Labs, Geobrugg AG, Monterra d o o, Siemens d d, Beton Lucko d o o, Nin Saltwork

Estimation of specific gravity with penetration and penetration index parameters by artificial neural network

Specific 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

Marshall Stability Estimating Using Artificial Neural Network with Polyparaphenylene Terephtalamide Fibre Rate

International Symposium on Innovations in Intelligent Systems and Applications (INISTA) -- AUG 02-05, 2016 -- Sinaia, ROMANIASaltan, Mehmet/0000-0001-6221-4918; terzi, serdal/0000-0002-4776-824X; Eriskin, Ekinhan/0000-0002-0087-0933; Eriskin, Ekinhan/0000-0002-0087-0933; Karahancer, Sebnem/0000-0001-7734-2365WOS: 000386824000029Due 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.IEEE, IDS Res Grp, Fac Automat Comp & Elect, Dept Comp & Informat Technol, Fac Econ & Business Adm, Dept Stat & Business Informat, Fac Math & Nat Sci, Dept Informat, Univ Craiov

Utility of polyparaphenylene terephtalamide fiber in hot mix asphalt as a fiber

Eriskin, Ekinhan/0000-0002-0087-0933; Eriskin, Ekinhan/0000-0002-0087-0933; Saltan, Mehmet/0000-0001-6221-4918; Karahancer, Sebnem/0000-0001-7734-2365; terzi, serdal/0000-0002-4776-824XWOS: 000370308000009In 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