Study on classical and rheological performance of high viscosity modified asphalt for porous asphalt mixture

2020 ◽  
pp. 36-44
Author(s):  
Haiyan Zhang ◽  
Hui Tang ◽  
Bin Xu ◽  
Dongwei Cao ◽  
Bo Yuan ◽  
...  
Keyword(s):  
Asphalt Mixture ◽  
High Viscosity ◽  
Porous Asphalt ◽  
Modified Asphalt ◽  
Rheological Performance

scholarly journals Study on Compatibility and Rheological Properties of High-Viscosity Modified Asphalt Prepared from Low-Grade Asphalt

Materials ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 3776 ◽  
Author(s):  
Mingliang Li ◽  
Feng Zeng ◽  
Ruigang Xu ◽  
Dongwei Cao ◽  
Jun Li
Keyword(s):  
High Temperature ◽  
Asphalt Mixture ◽  
Material Design ◽  
High Viscosity ◽  
Low Grade ◽  
Local Climate ◽  
Porous Asphalt ◽  
Modified Asphalt ◽  
Before And After ◽  
High Temperature Condition

High-viscosity modified asphalt is mainly used as a binder for porous asphalt in China and Japan. In order to meet the demand for using porous asphalt under high temperature condition in Africa, high-viscosity asphalt made from low-grade matrix asphalt, which is commonly used in Africa is investigated. Based on simulation of local climate in Africa, the suitable range of high viscosity additive content for different matrix asphalt was obtained by analyzing dynamic viscosity of the asphalt. Through PG high temperature grading, multi-stress repeated creep, accelerated fatigue, temperature sweep and other tests, changes of high temperature, anti-fatigue and anti-shear indicators before and after modification were compared and analyzed and effects of different matrix asphalt were also studied. Finally, considering engineering requirements, mixing and compaction temperatures of various high-viscosity modified asphalt were determined through study of viscosity-temperature characteristics. This research provides a support for preparation of high-viscosity modified asphalt and porous asphalt mixture by using low grade asphalt. The research achievements can help to guide the material design and application of porous asphalt in Africa and other high temperature areas.

Laboratory Investigation of the Adhesion and Self-Healing Properties of High-Viscosity Modified Asphalt Binders

2020 ◽  
Vol 2674 (1) ◽  
pp. 307-318 ◽  
Author(s):  
Mingjun Hu ◽  
Daquan Sun ◽  
Tong Lu ◽  
Jianmin Ma ◽  
Fan Yu
Keyword(s):  
Water Immersion ◽  
Gel Permeation Chromatography ◽  
High Viscosity ◽  
Healing Time ◽  
Adhesion Property ◽  
Asphalt Binders ◽  
Self Healing ◽  
Porous Asphalt ◽  
Modified Asphalt ◽  
Water Damage

Water damage often occurs on porous asphalt pavement during service life because of the well-developed pore structure. Determining the adhesion and adhesion healing properties of high-viscosity modified asphalt (HVMA) under water condition is beneficial to understand the water damage process of porous asphalt. In this study, the modified binder bond strength test was first conducted to investigate the adhesion property and self-healing behavior of HVMA at different conditions. Then, the surface energy test was carried out to further characterize the differences in adhesion property of HVMA. Moreover, the gel permeation chromatography test and fluorescence microscopic test were used to investigate the influence of chemical composition and polymer morphology on the adhesion property of HVMA. Results show that the presence of water reduces the adhesion property of HVMA. The addition of polymers leads to an increasing adhesion strength and a decreasing self-healing ability of HVMA. The self-healing ability of HVMA improves with the increase of temperature, but also shows a decreased trend when the healing time is long at high-temperature water immersion. The effect of polymers on the adhesion property of asphalt has two aspects. First, the swelling of polymers leads to an increasing content of polar heavy components in HVMA, thus enhancing polarity adsorption between asphalt and aggregate. Moreover, a polymer-centered interfacial diffusion layer can be formed during the adsorption of light components, which increases the overlapping area of structural asphalt between adjacent aggregates. This can also improve the adhesion property at the asphalt–aggregate interface.

scholarly journals REPRODUCTION OF HIGH VISCOSITY MODIFIED ASPHALT & RECLAMATION OF POROUS ASPHALT MIXTURES

2004 ◽  
Vol 9 ◽  
pp. 101-108 ◽  
Author(s):  
Takara OKOCHI ◽  
Satoru HORIGUCHI ◽  
Hiromitsu NAKANISHI ◽  
Teruhiko MARUYAMA
Keyword(s):  
High Viscosity ◽  
Asphalt Mixtures ◽  
Porous Asphalt ◽  
Modified Asphalt

Study on Durability of Granulated Crumb Rubber Asphalt Pavement Based on TPS High-Viscosity Asphalt

2014 ◽  
Vol 587-589 ◽  
pp. 985-989 ◽  
Author(s):  
Yong Shou Yang ◽  
Qiang Dong
Keyword(s):  
Asphalt Pavement ◽  
Water Immersion ◽  
Asphalt Mixture ◽  
Crumb Rubber ◽  
High Viscosity ◽  
Water Stability ◽  
Mineral Aggregate ◽  
Modified Asphalt ◽  
Adhesion Ability ◽  
Sbs Modified Asphalt

In order to improve the durability of granulated crumb rubber asphalt pavement, different amount of TPS modifier are added into granulated crumb rubber asphalt mixture to do tests of water-boiling, water immersion, immersing Marshall, cantabro immersion and some other indoor experiments. Through comparing with base asphalt and SBS modified asphalt, we found that the adhesion ability of asphalt and mineral aggregate and crumb rubber were granulated after adding TPS modifier. The water stability of granulated crumb rubber asphalt mixture is improved. The durability of granulated crumb rubber asphalt mixture has also been improved dramatically. In additions, the optimum mixing volume of TPS for granulated crumb rubber asphalt mixture is 12%; the mixing temperature of asphalt mixture is 185°C.

scholarly journals MODIFIED ASPHALT MIXTURES RESISTANCE TO PERMANENT DEFORMATIONS

2007 ◽  
Vol 13 (4) ◽  
pp. 307-315 ◽  
Author(s):  
Piotr Radziszewski
Keyword(s):  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Test Results ◽  
Short Term ◽  
Porous Asphalt ◽  
Modified Asphalt ◽  
Road Pavement ◽  
In Situ Conditions ◽  
Modified Binders

Permanent deformations, primarily in the form of ruts, are one of the basic asphalt pavement damages impairing its service properties. Application of appropriate asphalt mixtures and binder modification are effective methods for improving asphalt courses resistance. While being manufactured, stored, fitted into a road pavement and during long term service, bitumen binders and asphalt mixtures are subject to continuous unfavourable ageing processes during which pavement courses characteristics change considerably, resistance to permanent deformations being among them. This article presents rut and dynamic creep test results of concrete, SMA (stone mastic asphalt), MNU (thin courses of non‐continuous grain mixtures), Superpave mixture and porous asphalt mixture of two air void content percentages: 15 %, 20 %. Asphalt concrete mixtures, MNU's and porous asphalt mixtures contained elastomer, plastomer and fine rubber modified binders. Samples for laboratory rut tests were made by slab compaction because this method, as the author's previous research had shown, was the closest to ‘in‐situ’ conditions. Resistance to permanent deformations of the examined specimens was evaluated before aging, after technological aging (short term ageing) and after service ageing (long‐term ageing). The test results show that resistance to permanent deformations depends on the kind of asphalt mixture and binder applied. Concrete asphalts with fine rubber modified bitumens and concrete asphalts with 7 % polymer modified binders as well as SMA's and Superpave mixtures with unmodified binders appeared to be most resistant to permanent deformations after a long‐term laboratory ageing. It was proved that the overall evaluation of resistance to permanent deformations could be obtained by rut and creep testing of asphalt mixtures exposed to short‐ and long‐term ageing. Simultaneous determining 4 parameters: maximum rut depth after short‐term ageing, rutting coefficient after operational ageing, stiffness creeping modulus after long‐term ageing and cumulated deformation after short‐term ageing, facilitates full characteristics of modified asphalt mixes designed to be built in the wearing course of a road pavement.

Sign in / Sign up

Export Citation Format

Share Document