The Experts below are selected from a list of 264 Experts worldwide ranked by ideXlab platform
Saad Issa Sarsam - One of the best experts on this subject based on the ideXlab platform.
-
Influence of Recycling Agent on Surface Free Energy of Asphalt Cement
Journal of Traffic and Transportation Engineering, 2019Co-Authors: Saad Issa Sarsam, Rana Khalid HamdanAbstract:Reliable surface free energy characterization is required in order to implement the suitable recycling agent into aged Asphalt. One proven method to estimate Asphalt surface free energy is to calculate it using contact angles measured with various liquids. The efficiency of recycling agent in terms of its impact on rheology and surface free energy of Asphalt Cement is vital in the decision of recycling aged Asphalt concrete. In this investigation, Asphalt Cement of penetration grade 40-50 was subjected to aging using the thin film oven test. The aged and the control Asphalt Cement samples have been digested with various percentages of two type of polymer recycling agents (Polyethylene and crumb rubber). Recycled and control Asphalt Cement specimens were subjected to physical and rheological properties determination, while the surface free energy was determined using Wilhelmy plate and Sessile drop methods. It was observed that the surface free energy decreases after aging, while it increases after digestion with polymers. Digestion of aged Asphalt Cement with polyethylene was able to retain the original surface free energy of Asphalt Cement before aging, while a higher percentage of 1.5 polyethylene has improved the surface free energy beyond the requirements. Digestion of aged Asphalt Cement with crumb rubber was able to increase the surface free energy of Asphalt Cement by one-fold of that before aging when Wilhelmy plate method was implemented, while a higher percentage of 1.0 of crumb rubber has improved the surface free energy beyond the requirements.
-
Influence of Blending Technique on Surface Free Energy of Modified Asphalt Cement
2018Co-Authors: Saad Issa Sarsam, Mustafa Kamal AbdulhussainAbstract:Abstract The processing technique of modified Asphalt Cement in the laboratory is adopted by heating the Asphalt Cement in an oven to the required mixing temperature; then the additive is added and mixed for a target mixing time. It was felt that such technique allows more volatiles to evaporate and required high mixing temperature. In this work, Asphalt Cement of 44 penetration grade was gained from Dora refinery, south west of Baghdad; the Asphalt Cement had experienced physical and rheological properties determination. Asphalt Cement was then digested with varying percentages of two types of modifiers, Carbon Black (5, 10, and 15%) and Sulfur (3, 5, 7, and 10%), by weight of Asphalt. Since the preparation method of modified Asphalt Cement has a great influence on its quality, two blending techniques have been implemented; the traditional oven heating and stirring, and blending inside the cooking pressure vessel. The surface free energy component of the prepared Asphalt Cement mixtures was measured using the Wilhelmy plate and sessile drop methods. The aim of this work is to assess how surface free energy characteristics and the blending techniques alter the properties of modified Asphalt Cement. For comparison, the surface free energy characteristics of the unmodified bitumen were also determined. Based on the result obtained, it was concluded that pressure vessel blending is more appropriate for enhancing the required homogeneity in the blending process. The pressure vessel technique exhibits higher surface free energy of 7.4 and 13.2% for carbon black and sulfur additives respectively with sessile drop method. Wilhelmy plate method shows that the surface free energy is lower by 6.3% and higher by 10% for carbon black and sulfur respectively when the pressure vessel technique was implemented as compared to oven heating technique. Keywords: Modified Asphalt Cement, Wilhelmy plate, sessile drop, surface free energy, pressure vessel, blending Cite this Article Saad Issa Sarsam, Mustafa Kamal Abdulhussain. Influence of Blending Technique on Surface Free Energy of Modified Asphalt Cement. Trends in Transport Engineering and Applications . 2018; 5(1): 22–31p.
-
Assessing Rheological Behavior of Modified Paving Asphalt Cement
American Journal of Civil and Structural Engineering, 2014Co-Authors: Saad Issa Sarsam, Ibtihal Mouiad LaftaAbstract:The Asphalt Cement is produced as by-product from oil industry in Iraq; the Asphalt must practice further processing to control the percentage of its different ingredients so that it will be suitable for paving process. If such processing is not conducted, then another alternative of modifying the Asphalt Cement properties with additives could be implemented. The objective of this work is to prepare different types of modified Asphalt Cement using locally available additives, and subjecting the prepared modified Asphalt Cement to testing procedures usually adopted for Asphalt Cement, and evaluates the suitability of modified Asphalt Cement for paving process requirements. An attempt was made to prepare the modified Asphalt Cement for pavement construction in the laboratory by digesting each of the two penetration grade Asphalt Cement (40-50 and 60-70)with sulfur, fly ash, fumed silica, crumb rubber and Phospho gypsum. Three different percentages of each of the above mentioned additives have been tried using continuous stirring and heating at 150- 160 o C for 30 minutes .The prepared modified Asphalt specimens were subjected to physical properties determination; such as (Cone penetration, Softening point, Resilience, Cold bond adhesion) to investigate its quality. Rheological properties such as Creep stiffness, Penetration index, Stiffness modulus and Penetration viscosity number were also investigated and compared. It was concluded that Sulfur additive provides the lowest creep stiffness at all of the loading periods and for both Asphalt grades, while crumb rubber additive shows the highest creep stiffness. The softer Asphalt 60-70 experience increases in the magnitude of m-60 by 84 percent when compared to harder Asphalt of 40-50. Sulfur, Phospho gypsum, and fly ash increase the temperature susceptibility of both grades of Asphalt Cement, while Rubber and sulfur, improved the elastic properties of both grades of Asphalt.
-
Effect of Nano Materials on Asphalt Cement Properties
International Journal of Scientific Research in Knowledge, 2013Co-Authors: Saad Issa SarsamAbstract:The mechanical and rheological behavior of Asphalt Cement depends to a great extent on structural elements and phenomena which are effective on a micro- and Nano-scale. In this work, efforts have been made to digest Asphalt Cement with two types of Nano materials, and study the possibilities of improving mechanical, rheological, and physical properties of this important group of composite construction materials. The investigated materials are Silica fumes and fly ash. A comprehensive testing program has been set to study the possibility of digesting penetration grades Asphalt Cement (40-50), obtained from Dorah refinery-Baghdad, with different percentages of such materials. The impact has been measured through monitoring the changes in penetration, softening point, ductility, and rheological characteristics.
-
Improving Asphalt Cement Properties by Digestion with Nano Materials
Research and Application of Material, 2013Co-Authors: Saad Issa SarsamAbstract:The mechanical and rheological behavior of Asphalt Cement depends to a great extent on structural elements and phenomena which are effective on a micro- and Nano-scale. In this work, efforts have been made to digest Asphalt Cement with two types of Nano materials, and study the possibilities of improving mechanical, rheological, and physical properties of this important group of composite construction materials. The investigated materials are Silica fumes and fly ash. A comprehensive testing program has been set to study the possibility of digesting penetration grades Asphalt Cement (40-50), obtained from Dorah refinery-Baghdad, with different percentages of such materials. The impact has been measured through monitoring the changes in penetration, softening point, ductility, and rheological characteristics.
A Mahrez - One of the best experts on this subject based on the ideXlab platform.
-
Utilization of waste plastic in stone mastic Asphalt
2010Co-Authors: Ahmadinia, Zargar, Maaz Rehan, A MahrezAbstract:Stone mastic Asphalt (SMA) is a hot mixture Asphalt that contains high filler content and typically contains a polymer in the Asphalt Cement, or fibre (cellulose or mineral) in the mixture to prevent drainage of the Asphalt Cement. The productive use of waste material and reuse of waste represents a means of alleviating some of the problems of solid waste management. This study investigates the use of waste plastic bottles in stone mastic Asphalt to improve and enhance pavement performance. Various percentages of waste plastic were blended in the mixtures. The dry blending method was used for the preparation of samples. Unmodified and modified mixtures were subjected to mechanical tests. This paper shows that there is a serious need for more research to evaluate polymer modified Asphalt mixtures. (a) For the covering entry of this conference, please see ITRD abstract no. E219487.
-
Utilization of waste plastic in stone mastic Asphalt
2010Co-Authors: Ahmadinia, Zargar, Maaz Rehan, A MahrezAbstract:Stone mastic Asphalt (SMA) is a hot mixture Asphalt that contains high filler content and typically contains a polymer in the Asphalt Cement, or fibre (cellulose or mineral) in the mixture to prevent drainage of the Asphalt Cement. The productive use of waste material and reuse of waste represents a means of alleviating some of the problems of solid waste management. This study investigates the use of waste plastic bottles in stone mastic Asphalt to improve and enhance pavement performance. Various percentages of waste plastic were blended in the mixtures. The dry blending method was used for the preparation of samples. Unmodified and modified mixtures were subjected to mechanical tests. This paper shows that there is a serious need for more research to evaluate polymer modified Asphalt mixtures. (a) For the covering entry of this conference, please see ITRD abstract no. E219487.
Ahmadinia - One of the best experts on this subject based on the ideXlab platform.
-
Utilization of waste plastic in stone mastic Asphalt
2010Co-Authors: Ahmadinia, Zargar, Maaz Rehan, A MahrezAbstract:Stone mastic Asphalt (SMA) is a hot mixture Asphalt that contains high filler content and typically contains a polymer in the Asphalt Cement, or fibre (cellulose or mineral) in the mixture to prevent drainage of the Asphalt Cement. The productive use of waste material and reuse of waste represents a means of alleviating some of the problems of solid waste management. This study investigates the use of waste plastic bottles in stone mastic Asphalt to improve and enhance pavement performance. Various percentages of waste plastic were blended in the mixtures. The dry blending method was used for the preparation of samples. Unmodified and modified mixtures were subjected to mechanical tests. This paper shows that there is a serious need for more research to evaluate polymer modified Asphalt mixtures. (a) For the covering entry of this conference, please see ITRD abstract no. E219487.
-
Utilization of waste plastic in stone mastic Asphalt
2010Co-Authors: Ahmadinia, Zargar, Maaz Rehan, A MahrezAbstract:Stone mastic Asphalt (SMA) is a hot mixture Asphalt that contains high filler content and typically contains a polymer in the Asphalt Cement, or fibre (cellulose or mineral) in the mixture to prevent drainage of the Asphalt Cement. The productive use of waste material and reuse of waste represents a means of alleviating some of the problems of solid waste management. This study investigates the use of waste plastic bottles in stone mastic Asphalt to improve and enhance pavement performance. Various percentages of waste plastic were blended in the mixtures. The dry blending method was used for the preparation of samples. Unmodified and modified mixtures were subjected to mechanical tests. This paper shows that there is a serious need for more research to evaluate polymer modified Asphalt mixtures. (a) For the covering entry of this conference, please see ITRD abstract no. E219487.
Ag Juristovski - One of the best experts on this subject based on the ideXlab platform.
-
Physical Properties of Tall Oil Pitch Modified Asphalt Cement Binders
Physical Properties of Asphalt Cement Binders, 1995Co-Authors: Ra Johnson, Ag JuristovskiAbstract:In recent years, significant advances in Asphalt modifications have been achieved, particularly in the field of polymer modified Asphalt Cement binders. Concurrently, environmental concerns and recycling processes are becoming a part of our everyday life. Tall oil pitch (TOP) is a by-product of the kraft process in the pulp and paper industry. The company's research and development team has conducted development programs and intensive testing of physical properties of tall oil pitch modified Asphalt Cement binders. Obtained results show that tall oil pitch strongly influences the rheological properties of Asphalt Cement. These blends have higher penetration, lower viscosity, and are more temperature susceptible than original Asphalt Cement. Blends also have excellent wetting properties of aggregate.
Taisir S. Khedaywi - One of the best experts on this subject based on the ideXlab platform.
-
Study on utilising waste toner in Asphalt Cement
Road Materials and Pavement Design, 2014Co-Authors: Taisir S. KhedaywiAbstract:Every year, large quantities of waste toner come from either the manufacturing processes or from copying machines and laser printers. This material causes environmental pollution as well as costly disposal problems. In this research, an attempt to partially overcome these problems was made through using this waste in Asphalt concrete mixtures in flexible pavement of road surfaces. The main objective of this research was to study the effect of waste toner on the properties of the Asphalt Cement. An Asphalt Cement of a 60/70 penetration grade was used in this study. The waste toner was added to the Asphalt Cement at five contents (0%, 5%, 10%, 15% and 20% by volume of the Asphalt Cement). Tests including penetration, ductility, specific gravity, softening point, flash point, fire point and rotational viscosity were carried out on each of the prepared binders. The test results were analysed to determine the effect of the waste toner content on the measured properties of the Asphalt Cement. Tests results show...
-
Laboratory study on solidification/stabilization of unwanted medications using Asphalt as a binder
Journal of Material Cycles and Waste Management, 2013Co-Authors: Mohammad A. T. Alsheyab, Taisir S. Khedaywi, Mohammad S. ElayanAbstract:The rise in discarded or unwanted medications (UMs) is becoming an issue of great concern, as it has the potential to harm the components of the environment where it is discarded: particularly air, water and soil. To combat this problem, many researchers have investigated the best approach for the collection and proper disposal of UMs. This paper intends to elaborate upon a safe solution for treating this waste, specifically through a process of solidification/stabilization (S/S) that involves mixing UMs with Asphalt Cement and Asphalt concrete mixtures. Volumes of 5, 10, 15 and 20 % of a mixture of UMs were mixed with Asphalt Cement and the analyzed properties of the mixture of UMs–Asphalt included: softening point, ductility, penetration, flash and fire points, specific gravity and rotational viscosity. Marshal stability, flow, air voids, unit weight, voids in mineral aggregate (VMA) and voids filled with binder (VFB) of Asphalt concrete mixture were also investigated. Results showed that this approach of S/S is a promising method for dual achievements to solve an environmental problem and to use the waste for road construction.
-
effect of electric arc furnace dust eafd on properties of Asphalt Cement mixture
Resources Conservation and Recycling, 2013Co-Authors: Mohammad A. T. Alsheyab, Taisir S. KhedaywiAbstract:Abstract Electric arc furnace dust (EAFD) is one of the by-products of steelmaking industry which has been classified as hazardous due to containing some heavy metals such as Zinc, Cobalt, Copper, Lead or Cadmium. This research aims at solving the problem of this hazardous waste by solidification/stabilization through mixing it with Asphalt Cement to be used for road construction. EAFD was used as an additive to the Asphalt concrete mixtures with five percentages (0%, 5%, 10%, 15% and 20%) by volume of binder. Penetration, ductility, specific gravity, softening point, flash point, fire point and rotational viscosity were analyzed. It was found that while the penetration and ductility were decreasing with the increase of EAFD concentration in the binder, specific gravity, softening point, flash point, fire point and rotational viscosity were increasing. Finally it has been concluded that the results are promising for dual achievement (1) to solve an environmental problem and (2) to use the EAFD for road construction.
