Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Evaluation of Long Term Performance of High Modulus Bituminous Mixes
Recent studies on flexible pavements signify that it may be advantageous to use High Modulus Bituminous Mixes (HiMB) in bituminous base layer to enhance the life of pavement. HiMB mixes are produced with hard grade bitumen and designed at lower air voids to incorporate high bitumen content. Hard grade bitumen is usually produced in refineries by propane-de asphalting (PDA) method or air blowing technique. An alternative method of producing HiMB mixes is by using Reclaimed Asphalt Pavement (RAP) material as it consists of aged bitumen which is stiff in nature. Bituminous mix was prepared with viscosity grade (VG) 40 bitumen is blended with 33% RAP to target the HiMB mix prepared using PDA pitch that results in equivalent resilient modulus (Mr) and fatigue life. It is important to understand effect of addition of aged bitumen on long term performance of the mix. The present study focuses on the evaluation of laboratory long term aged properties of HiMB mixes produced by both PDA pitch and VG 40 blended with 33% RAP using Dense Bituminous Macadam (DBM-II) aggregate gradation. HiMB mixes were subjected to long term aging and evaluated for mechanical properties and performance. The results of Indirect Tensile Strength, resilient modulus and fatigue performance reveal that the mix prepared using PDA pitch is more susceptible to brittle failure in long term aged condition.
Evaluation of Long Term Performance of High Modulus Bituminous Mixes
Recent studies on flexible pavements signify that it may be advantageous to use High Modulus Bituminous Mixes (HiMB) in bituminous base layer to enhance the life of pavement. HiMB mixes are produced with hard grade bitumen and designed at lower air voids to incorporate high bitumen content. Hard grade bitumen is usually produced in refineries by propane-de asphalting (PDA) method or air blowing technique. An alternative method of producing HiMB mixes is by using Reclaimed Asphalt Pavement (RAP) material as it consists of aged bitumen which is stiff in nature. Bituminous mix was prepared with viscosity grade (VG) 40 bitumen is blended with 33% RAP to target the HiMB mix prepared using PDA pitch that results in equivalent resilient modulus (Mr) and fatigue life. It is important to understand effect of addition of aged bitumen on long term performance of the mix. The present study focuses on the evaluation of laboratory long term aged properties of HiMB mixes produced by both PDA pitch and VG 40 blended with 33% RAP using Dense Bituminous Macadam (DBM-II) aggregate gradation. HiMB mixes were subjected to long term aging and evaluated for mechanical properties and performance. The results of Indirect Tensile Strength, resilient modulus and fatigue performance reveal that the mix prepared using PDA pitch is more susceptible to brittle failure in long term aged condition.
Evaluation of Long Term Performance of High Modulus Bituminous Mixes
RILEM Bookseries
Di Benedetto, Hervé (Herausgeber:in) / Baaj, Hassan (Herausgeber:in) / Chailleux, Emmanuel (Herausgeber:in) / Tebaldi, Gabriele (Herausgeber:in) / Sauzéat, Cédric (Herausgeber:in) / Mangiafico, Salvatore (Herausgeber:in) / Anil Kumar, B. (Autor:in) / Kesharwani, Ashish (Autor:in) / Goli, Arun Kumar (Autor:in) / Amaranatha Reddy, M. (Autor:in)
RILEM International Symposium on Bituminous Materials ; 2020 ; Lyon, France
Proceedings of the RILEM International Symposium on Bituminous Materials ; Kapitel: 103 ; 811-817
RILEM Bookseries ; 27
26.09.2021
7 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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