Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Evaluation of Warm Mix Asphalt Produced from Iraqi Materials
Warm mix asphalts (WMAs) have gained a widespread popularity as they have reduced emissions due to lower production temperature compared to that of traditional hot mix asphalt (HMA). In Iraq, such asphalt mixture is completely new while no project of WMA has constructed in the field so far although there is a huge demand to either re-construct or construct new highways. One of the considerations that should be taken into account in this regard is to get the advantages of installing WMA in Iraq. The aim of this study is to produce a warm mix asphalt using foaming additive, Zeolite, in both types natural and synthetic. The production temperatures of WMAs were at three levels 140, 130 and 120 °C while the traditional HMA was produced at 160 °C. This study includes producing HMA and WMAs from Iraqi materials, where one binder grade (40/50 pen) from one sources, it is Durah with one type of aggregate, limestone. Hydrated lime was also used as anti-stripping additive to study its effect on improving moisture damage of WMA produced at lower temperature. To study those properties, two techniques were used Marshall properties and Indirect Tensile test. The results showed there is no significant difference between the performances of WMAs compared to that of HMA taking in account level of reduction in the production temperature compared to that of traditional hot mix asphalt. Furthermore, the result of Indirect Tensile Strength ITS has shown the enhancement in moisture susceptibility of warm mix when hydrated lime was used.
Evaluation of Warm Mix Asphalt Produced from Iraqi Materials
Warm mix asphalts (WMAs) have gained a widespread popularity as they have reduced emissions due to lower production temperature compared to that of traditional hot mix asphalt (HMA). In Iraq, such asphalt mixture is completely new while no project of WMA has constructed in the field so far although there is a huge demand to either re-construct or construct new highways. One of the considerations that should be taken into account in this regard is to get the advantages of installing WMA in Iraq. The aim of this study is to produce a warm mix asphalt using foaming additive, Zeolite, in both types natural and synthetic. The production temperatures of WMAs were at three levels 140, 130 and 120 °C while the traditional HMA was produced at 160 °C. This study includes producing HMA and WMAs from Iraqi materials, where one binder grade (40/50 pen) from one sources, it is Durah with one type of aggregate, limestone. Hydrated lime was also used as anti-stripping additive to study its effect on improving moisture damage of WMA produced at lower temperature. To study those properties, two techniques were used Marshall properties and Indirect Tensile test. The results showed there is no significant difference between the performances of WMAs compared to that of HMA taking in account level of reduction in the production temperature compared to that of traditional hot mix asphalt. Furthermore, the result of Indirect Tensile Strength ITS has shown the enhancement in moisture susceptibility of warm mix when hydrated lime was used.
Evaluation of Warm Mix Asphalt Produced from Iraqi Materials
Lecture Notes in Civil Engineering
Raab, Christiane (Herausgeber:in) / Mahdi, Noor J. (Autor:in) / Abd, Duraid M. (Autor:in) / Ahmed, Taher M. (Autor:in)
20.06.2020
10 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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