scholarly journals Experimental characterization of storage stability of crumb rubber modified bitumen with warm-mix additives

2020 ◽  
Vol 249 ◽  
pp. 118840 ◽  
Author(s):  
Haopeng Wang ◽  
Xueyan Liu ◽  
Sandra Erkens ◽  
Athanasios Skarpas
Keyword(s):  
Storage Stability ◽  
Crumb Rubber ◽  
Experimental Characterization ◽  
Modified Bitumen ◽  
Warm Mix Additives

Rheological Findings on Storage Stability for Chemically Dispersed Crumb Rubber Modified Bitumen

2021 ◽  
Vol 305 ◽  
pp. 124768
Author(s):  
Naeem Aziz Memon ◽  
Nur Izzi Md. Yusoff ◽  
Syed Faraz Jafri ◽  
Khawaja Sheeraz
Keyword(s):  
Storage Stability ◽  
Crumb Rubber ◽  
Modified Bitumen

scholarly journals Fatigue performance of long-term aged crumb rubber modified bitumen containing warm-mix additives

2020 ◽  
Vol 239 ◽  
pp. 117824 ◽  
Author(s):  
Haopeng Wang ◽  
Xueyan Liu ◽  
Martin van de Ven ◽  
Guoyang Lu ◽  
Sandra Erkens ◽  
...  
Keyword(s):  
Crumb Rubber ◽  
Fatigue Performance ◽  
Modified Bitumen ◽  
Warm Mix Additives

scholarly journals Non-Newtonian Behaviors of Crumb Rubber-Modified Bituminous Binders

2018 ◽  
Vol 8 (10) ◽  
pp. 1760 ◽  
Author(s):  
Haopeng Wang ◽  
Xueyan Liu ◽  
Panos Apostolidis ◽  
Tom Scarpas
Keyword(s):  
Shear Thinning ◽  
Crumb Rubber ◽  
Shear Loading ◽  
Modified Bitumen ◽  
Zero Shear Viscosity ◽  
Shear Rates ◽  
Rate Dependent ◽  
Correlation Degree ◽  
Warm Mix Additives ◽  
Bituminous Binders

Crumb rubber-modified bitumen (CRMB) has been utilized in the asphalt paving industry for decades due to its various benefits. The complex interaction between bitumen and crumb rubber as well as the addition of warm-mix additives makes the typical laws of Newtonian fluids insufficient to describe the behaviors of highly modified bituminous binders. To systematically explore the non-Newtonian behaviors of CRMB, a dynamic shear rheometer was utilized to apply shear loading on the samples at various temperatures and shear rates. Results show that the viscosity of different binders are highly temperature- and shear rate-dependent, while highly modified binders exhibit more obvious shear-thinning behaviors at certain temperatures. With the help of zero shear viscosity and yield stress, the shear-thinning behaviors of non-Newtonian binders can be sufficiently characterized. The Arrhenius equation is invalid to describe viscosity-temperature characteristics of bitumen in the non-Newtonian region. A second-order polynomial function was proposed to characterize the viscosity-temperature dependence with a high correlation degree.

Improved Storage Stability of Crumb Rubber Modified Bitumen using Long Chain Amines

2017 ◽  
Vol V6 (08) ◽  
Author(s):  
Mr. Chandra Sekhar Mohanta ◽  
Dr. Veena Yadav ◽  
Dr. N S Raman ◽  
Dr. R P Badoni ◽  
Keyword(s):  
Storage Stability ◽  
Crumb Rubber ◽  
Modified Bitumen ◽  
Long Chain

scholarly journals Modification of Asphalt Rubber with Nanoclay towards Enhanced Storage Stability

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2093 ◽  
Author(s):  
Jiangmiao Yu ◽  
Zhibin Ren ◽  
Huayang Yu ◽  
Duanyi Wang ◽  
Shekhovtsova Svetlana ◽  
...  
Keyword(s):  
Storage Stability ◽  
Middle Layer ◽  
Crumb Rubber ◽  
Fatigue Properties ◽  
X Ray Diffraction ◽  
Modified Bitumen ◽  
Obvious Effect ◽  
Performance Grade ◽  
Asphalt Rubber ◽  
The Difference

Asphalt rubber (AR), which is prepared by blending crumb rubber and bitumen, provides various advantages, including superior rutting resistance, lower road-tire noise and longer service life. However, contractors have expressed concerns regarding its poor storage stability, which in turn limits its wider application. This study aims to address the storage stability concern by incorporating nano-montmorillonite (nanoclay). Three types of nanoclay were dispersed into hot AR binder by high shear blending. The rheological properties of nanoclay-crumb rubber modifier (CRM)-modified bitumen were evaluated through Superpave performance grade (PG) tests and the storage stability was characterized by measuring the difference in softening points or complex moduli at the top and bottom portions of binders after lab-simulated storage. X-ray diffraction (XRD) evaluation was conducted to observe the variation of nanoclay layer gap distance for mechanism investigation. It was found that all selected nanoclays had insignificant effects on workability, rutting and fatigue properties. The layered nanoclay transformed to intercalated or exfoliated structures after interaction with bitumen fractions, providing superior storage stability. Among the three selected nanoclays, pure montmorillonite with Na+ inorganic group, which has an intermediate hydrophilic property and middle layer gap, showed the most obvious effect on enhancing the storage stability of AR.

scholarly journals Characterization of Bitumen Modified with Pyrolytic Carbon Black from Scrap Tires

2019 ◽  
Vol 11 (6) ◽  
pp. 1631 ◽  
Author(s):  
Haopeng Wang ◽  
Guoyang Lu ◽  
Shuyin Feng ◽  
Xiaobo Wen ◽  
Jun Yang
Keyword(s):  
High Temperature ◽  
Carbon Black ◽  
Rheological Properties ◽  
Storage Stability ◽  
Pyrolytic Carbon ◽  
Scrap Tire ◽  
Modified Bitumen ◽  
Laboratory Test Results ◽  
Aging Resistance

Pyrolytic carbon black (CBp) from scrap tire pyrolysis is a potential modifier for the bitumen industry. Binders containing different contents of CBp were prepared and experimentally investigated to examine the effects of CBp on the electrical and thermal conductivity, conventional physical properties, rheological properties, high-temperature antirutting performance, aging resistance, and storage stability. Laboratory test results indicated that the incorporation of CBp effectively improves the electrothermal properties, rheological properties, high-temperature rutting resistance, and aging resistance. It also increases the viscosity and decreases the storage stability of bitumen. The study confirms that CBp-modified bitumen with proper selection of content can be a multifunctional paving material.

Rheological Characteristics of Epoxidized Natural Rubber Modified Bitumen

2014 ◽  
Vol 505-506 ◽  
pp. 174-179 ◽  
Author(s):  
Ramez A. Al-Mansob ◽  
Amiruddin Ismail ◽  
Nur Izzi Md Yusoff ◽  
Che Husna Azhari ◽  
Mohamed Rehan Karim ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Storage Stability ◽  
Asphalt Mixture ◽  
Epoxidized Natural Rubber ◽  
Rheological Characteristics ◽  
Polymer Modification ◽  
Modified Bitumen ◽  
Modified Binders ◽  
Temperature Susceptibility

Polymer modified bitumens have tended to be the most popular among the various types of modified binders that are available worldwide. Polymer modification significantly alters the rheological characteristics of the binder, thereby requiring the use of fundamental rheological testing methods to provide an indication of the performance of the binder and subsequently the asphalt mixture. In this paper the characterization of bitumen modified with epoxidized natural rubber (ENR) was done with four percentages of ENR content. The effects of the modifier on the conventional properties, storage stability and rheological properties were investigated. The results indicated that storage stability of ENR modified bitumens (ENRMB) were mainly dependent on the ENR content. ENR reduced the temperature susceptibility. The degree of the improvement generally increased with ENR content up to 9%.

Sign in / Sign up

Export Citation Format

Share Document