Preparation and Properties of Wood Tar-based Rejuvenated Asphalt
Open Access
- 2 March 2020
- Vol. 13 (5), 1123
- https://doi.org/10.3390/ma13051123
Abstract
In order to explore the applicability of the rejuvenated asphalt with wood tar as the main raw material, the orthogonal test was used to determine the optimal ratio of wood tar-based rejuvenator. The physical properties, rheological properties and components of matrix asphalt, aged asphalt, wood tar-based rejuvenated asphalt and commercial RA-102# rejuvenated asphalt were tested and compared. The results show that the optimal ratio of wood tar-based rejuvenator is 15wt% wood tar, 0.3wt% biomass fiber, 5wt% plasticizer, 0.3wt% compatibilizer, and 1wt% stabilizer of the mass of aged asphalt. Wood tar-based rejuvenator can restore the physical properties of the aged asphalt to meet the specification requirements. The synergistic effect of biomass fiber and plasticizer make the wood tar-based rejuvenated asphalt has good resistance to accumulated permanent deformation, but its low-temperature cracking resistance needs to be further improved. During the rejuvenation process of aged asphalt, the colloidal state changes from gel-state to sol-state, characterizing that the viscosity of asphalt decreased and the fluidity increased. Wood tar-based rejuvenator can react with aged asphalt to weaken the vibration strength of carbonyl and sulfoxide groups, so as to realize the recovery of service performance. Wood tar-based rejuvenator has better environmental protection and applicability, which is worthy of further study and promotion.Funding Information
- China Postdoctoral Science Foundation (2018M633003)
This publication has 66 references indexed in Scilit:
- Waste cooking oil as an asphalt rejuvenator: A state-of-the-art reviewConstruction and Building Materials, 2019
- Productions and applications of bio-asphalts – A reviewConstruction and Building Materials, 2018
- Damage characteristics of waste engine oil bottom rejuvenated asphalt binder in the non-linear range and its microstructureConstruction and Building Materials, 2018
- Impact of rejuvenators on aging properties of bitumenConstruction and Building Materials, 2015
- Determining optimum rejuvenator dose for asphalt recycling based on Superpave performance grade specificationsConstruction and Building Materials, 2014
- Life cycle assessment of hot mix asphalt and zeolite-based warm mix asphalt with reclaimed asphalt pavementResources, Conservation and Recycling, 2013
- Preparation of capsules containing rejuvenators for their use in asphalt concreteJournal of Hazardous Materials, 2010
- Investigation of chemical transformations by NMR and GPC during the laboratory aging of Arabian asphaltFuel, 1999
- Oxygen Uptake As Correlated to Carbonyl Growth in Aged Asphalts and Asphalt Corbett FractionsIndustrial & Engineering Chemistry Research, 1998
- Behaviour of recycled asphalt pavements at low temperaturesCanadian Journal of Civil Engineering, 1991