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Asphalt Cement

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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, 2019
    Co-Authors: Saad Issa Sarsam, Rana Khalid Hamdan

    Abstract:

    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
    , 2018
    Co-Authors: Saad Issa Sarsam, Mustafa Kamal Abdulhussain

    Abstract:

    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, 2014
    Co-Authors: Saad Issa Sarsam, Ibtihal Mouiad Lafta

    Abstract:

    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.

A Mahrez – One of the best experts on this subject based on the ideXlab platform.

  • Utilization of waste plastic in stone mastic Asphalt
    , 2010
    Co-Authors: Ahmadinia, Zargar, Maaz Rehan, A Mahrez

    Abstract:

    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
    , 2010
    Co-Authors: Ahmadinia, Zargar, Maaz Rehan, A Mahrez

    Abstract:

    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
    , 2010
    Co-Authors: Ahmadinia, Zargar, Maaz Rehan, A Mahrez

    Abstract:

    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
    , 2010
    Co-Authors: Ahmadinia, Zargar, Maaz Rehan, A Mahrez

    Abstract:

    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.