Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Cracking Healing Evaluation of HMA Using Indirect Tensile Stiffness Modulus Test
Crack healing is characterised by the recovery of stiffness in asphalt concrete after a period of rest. Micro damage occurs in asphalt pavement layers when there is continuous reduction in its stiffness modulus, which causes the formation of micro-cracks. This paper presents an evaluation into the healing potential of coarse and fine dense-graded asphalt mixes. The binders investigated were Modified Bitumen (MB) and two types of Trinidad Lake Asphalt (TLA) having penetration values of 60/70, 60/75 and 40/55 respectively. Evaluation of asphalt healing through the Indirect Tensile Stiffness Modulus (ITSM) were done, before cracking, after cracking and after healing periods of 1, 4 and 8 hrs at healing temperatures of 35 °C and 60 °C. Greater healing was exhibited in TLA-60/75 fine graded mixes at the lower temperature of 35 °C, while greater healing was seen in the MB-60/70 fine grade mixes at 60 °C, however, for the TLA coarse mixes greater healing was observed at 60 °C. TLA-60/75 specimens showed increased healing for greater rest periods while MB-60/70 and TLA-40/55 mixes varied with rest periods. The reduction of micro-damage in a pavement, greatly defers the propagation of macro cracks, extends serviceability, reduces maintenance costs and increases the sustainability of the pavement.
Cracking Healing Evaluation of HMA Using Indirect Tensile Stiffness Modulus Test
Crack healing is characterised by the recovery of stiffness in asphalt concrete after a period of rest. Micro damage occurs in asphalt pavement layers when there is continuous reduction in its stiffness modulus, which causes the formation of micro-cracks. This paper presents an evaluation into the healing potential of coarse and fine dense-graded asphalt mixes. The binders investigated were Modified Bitumen (MB) and two types of Trinidad Lake Asphalt (TLA) having penetration values of 60/70, 60/75 and 40/55 respectively. Evaluation of asphalt healing through the Indirect Tensile Stiffness Modulus (ITSM) were done, before cracking, after cracking and after healing periods of 1, 4 and 8 hrs at healing temperatures of 35 °C and 60 °C. Greater healing was exhibited in TLA-60/75 fine graded mixes at the lower temperature of 35 °C, while greater healing was seen in the MB-60/70 fine grade mixes at 60 °C, however, for the TLA coarse mixes greater healing was observed at 60 °C. TLA-60/75 specimens showed increased healing for greater rest periods while MB-60/70 and TLA-40/55 mixes varied with rest periods. The reduction of micro-damage in a pavement, greatly defers the propagation of macro cracks, extends serviceability, reduces maintenance costs and increases the sustainability of the pavement.
Cracking Healing Evaluation of HMA Using Indirect Tensile Stiffness Modulus Test
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) / Leon, Lee P. (Autor:in)
RILEM International Symposium on Bituminous Materials ; 2020 ; Lyon, France
Proceedings of the RILEM International Symposium on Bituminous Materials ; Kapitel: 64 ; 505-511
RILEM Bookseries ; 27
26.09.2021
7 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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