Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Rheological Properties and Rutting Characterization of Natural Rubber Modified Bitumen
From the early nineties, Thailand has been the world's largest producer and exporter of natural rubber latex (NRL). However, the current unbalances in demand/supply has led to a sharp reduction of NRL prices, which has required the Thailand government to boost NRL prices by encouraging domestic consumption and promoting its use as an alternative material for road infrastructure applications. Aiming at selecting and optimizing a suitable percentage of natural rubber latex able to improve the rheological and rutting resistance performance characteristics of natural rubber modified bitumen (NRMB), this research assesses the application of high ammonia concentrated natural rubber latex, which incorporates 60% Dry Rubber Content (DRC) and 40% water by total weight. This NRL was used as a modifier of AC60/70 bitumen at 0, 3, 5, 8% of DRC concentrations. The experimental programme comprised two stages that assessed: (1) the rheological properties by means of the Dynamic Shear Rheometer (DSR) test; and (2) the rutting performance through the Multiple Stress Creep Recovery (MSCR) test. The results indicated that NR increased the complex modulus and reduced phase angle at high temperature, while also providing significant improvement in the rutting resistance. Altogether, the main laboratory results proved that NR latex containing 8% of DRC to be the optimum NR dosage that induces improvements on the rheological properties and rutting performance of NRMB blends.
Rheological Properties and Rutting Characterization of Natural Rubber Modified Bitumen
From the early nineties, Thailand has been the world's largest producer and exporter of natural rubber latex (NRL). However, the current unbalances in demand/supply has led to a sharp reduction of NRL prices, which has required the Thailand government to boost NRL prices by encouraging domestic consumption and promoting its use as an alternative material for road infrastructure applications. Aiming at selecting and optimizing a suitable percentage of natural rubber latex able to improve the rheological and rutting resistance performance characteristics of natural rubber modified bitumen (NRMB), this research assesses the application of high ammonia concentrated natural rubber latex, which incorporates 60% Dry Rubber Content (DRC) and 40% water by total weight. This NRL was used as a modifier of AC60/70 bitumen at 0, 3, 5, 8% of DRC concentrations. The experimental programme comprised two stages that assessed: (1) the rheological properties by means of the Dynamic Shear Rheometer (DSR) test; and (2) the rutting performance through the Multiple Stress Creep Recovery (MSCR) test. The results indicated that NR increased the complex modulus and reduced phase angle at high temperature, while also providing significant improvement in the rutting resistance. Altogether, the main laboratory results proved that NR latex containing 8% of DRC to be the optimum NR dosage that induces improvements on the rheological properties and rutting performance of NRMB blends.
Rheological Properties and Rutting Characterization of Natural Rubber Modified Bitumen
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) / Wititanapanit, Jarurat (Autor:in) / Carvajal-Munoz, Juan S. (Autor:in) / Bamrungwong, Chakree (Autor:in) / Airey, Gordon (Autor:in)
RILEM International Symposium on Bituminous Materials ; 2020 ; Lyon, France
Proceedings of the RILEM International Symposium on Bituminous Materials ; Kapitel: 202 ; 1595-1602
RILEM Bookseries ; 27
26.09.2021
8 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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