Study on the permanent deformation of HR rubber powder composite modified asphalt mixture based on dynamic creep test

2016 ◽  
pp. 453-461
Author(s):  
Zhengguang Wu ◽  
Ruyang Lu ◽  
Dongyan Cai ◽  
Peng Xiao
Keyword(s):  
Creep Test ◽  
Permanent Deformation ◽  
Asphalt Mixture ◽  
Powder Composite ◽  
Rubber Powder ◽  
Modified Asphalt ◽  
Dynamic Creep

Evaluation of Permanent Deformation of BRA Modified Asphalt Paving Mixtures Based on Dynamic Creep Test Analysis

2016 ◽  
Vol 16 ◽  
pp. 69-81 ◽  
Author(s):  
Muhammad Karami ◽  
Ainalem Nega ◽  
Ahdyeh Mosadegh ◽  
Hamid Nikraz
Keyword(s):  
Creep Test ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Modified Asphalt ◽  
Nominal Size ◽  
Dynamic Creep ◽  
Asphalt Paving ◽  
Modified Binder

The main objective this study is to evaluate the permanent deformation of buton rock asphalt (BRA) modified asphalt paving mixtures using dynamic creep test so that long term deformation behavior of asphalt mixtures can be characterized. The dynamic creep test was conducted on unmodified and BRA modified asphalt mixture using UTM25 machine. Asphalt cement of C170 from a regional supplier in Western Australia was used as the base asphalt binder for unmodified asphalt mixture; and BRA modified asphalt mixtures were made by substituting the base asphalt with 10, 20, and 30% (by weight of total asphalt binder) natural binder continuing granular BRA modified binder. The granular (pellets) BRA modified binder with a diameter of 7-10 mm was produced and extracted according the Australia Standard. Crushed granite was taken from a local quarry of the region; and dense graded for both unmodified and BRA modified asphalt mixture with the nominal size of 10 mm was used. The results of this analysis showed that BRA modified had a good performance as compared with unmodified asphalt mixtures, and increase in the content modified binder to 10%, 20%, and 30% resulted in decrease of the total permanent strain.

scholarly journals MECHANICAL PERFORMANCE OF ASPHALT MIXTURE CONTAINING CUP LUMP RUBBER

2019 ◽  
Vol 81 (6) ◽  
Author(s):  
Norfazira Mohd Azahar ◽  
Norhidayah Abdul Hassan ◽  
Ramadhansyah Putra Jaya ◽  
Hasanan Md. Nor ◽  
Mohd Khairul Idham Mohd Satar ◽  
...  
Keyword(s):  
Mechanical Performance ◽  
Resilient Modulus ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Modified Asphalt ◽  
Dynamic Creep ◽  
Aging Conditions ◽  
Public Work Department ◽  
Indirect Tensile

The use of cup lump rubber as an additive in asphalt binder has recently become the main interest of the paving industry. The innovation helps to increase the natural rubber consumption and stabilize the rubber price. This study evaluates the mechanical performance of cup lump rubber modified asphalt (CMA) mixture in terms of resilient modulus, dynamic creep and indirect tensile strength under aging conditions. The CMA mixture was prepared using dense-graded Marshall-designed mix and the observed behavior was compared with that of conventional mixture. From the results, both mixtures passed the volumetric properties as accordance to Malaysian Public Work Department (PWD) specification. The addition of cup lump rubber provides better resistance against permanent deformation through the enhanced properties of resilient modulus and dynamic creep. Furthermore, the resilient modulus of CMA mixture performed better under aging conditions.  

scholarly journals Research on the Influence of Nanocarbon/Copolymer SBS/Rubber Powder Composite Modification on the Properties of Asphalt and Mixtures

2020 ◽  
Vol 2020 ◽  
pp. 1-16
Author(s):  
Wenhui Zhao ◽  
Xiangbing Xie ◽  
Guanghui Li ◽  
Jiuguang Geng ◽  
Meng Bao ◽  
...  
Keyword(s):  
Low Temperature ◽  
Asphalt Mixture ◽  
Temperature Stability ◽  
Powder Composite ◽  
High Temperature Stability ◽  
Rubber Powder ◽  
Modified Asphalt ◽  
Modification Process ◽  
Low Temperature Cracking ◽  
Surface Modified

To expand the application range of modified asphalt and mixtures and effectively reduce the aggregation of nanomaterials in asphalt, nanocarbon/styrene butadiene styrene (SBS)/rubber powder composite-modified asphalt is proposed. This paper presents a laboratory study on the performance of nanocarbon/copolymer SBS/rubber powder composite-modified asphalt, and nanocarbon particles modified by titanate coupling agents as modifiers are selected. The nanocarbon/copolymer SBS/rubber powder composite-modified asphalt was prepared by a high-speed shearing method. The physical properties and rheological performance were assessed using ductility tests, softening point tests, penetration tests, dynamic shear rheometer (DSR) tests, and bending beam rheometer (BBR) tests. Furthermore, the mixture properties, including the high-temperature stability, low-temperature cracking resistance, moisture stability, and freeze-thaw splitting, were evaluated in the laboratory. The micromorphology of the base asphalt and composite-modified asphalt was examined by scanning electron microscopy (SEM), and the reactions between the modifiers and AH-70 base asphalt were studied by Fourier transform infrared spectroscopy (FTIR). The results reveal that the surface-modified nanocarbon and rubber powder additives substantially increased the softening point and penetration index of the base asphalt, with little obvious influence on the low-temperature performance. In addition, when nanocarbon/copolymer SBS/rubber powder composite-modified asphalt was used, the high-temperature stability and low-temperature cracking resistance of the nanocarbon/copolymer SBS/rubber powder composite-modified asphalt mixture were approximately 1.3 times those of the nanocarbon/rubber powder asphalt mixture. In terms of the micromorphology and reaction, the addition of the nanocarbon can increase the compatibility between the base asphalt and rubber powder, and then the addition of copolymer SBS can improve the structure of nanocarbon (after surface modification)/rubber powder-modified asphalt to form a stable network. Moreover, the physical reaction plays the dominant role in the modification process for the rubber powder and base asphalt, and chemical reactions occur in the modification process for the surface-modified nanocarbon and base asphalt.

scholarly journals Evaluating the Effect of Hydrophobic Nanosilica on the Viscoelasticity Property of Asphalt and Asphalt Mixture

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2328 ◽  
Author(s):  
Wei Guo ◽  
Xuedong Guo ◽  
Mengyuan Chang ◽  
Wenting Dai
Keyword(s):  
Physical Properties ◽  
Creep Test ◽  
Performance Test ◽  
Asphalt Mixture ◽  
Lower Sensitivity ◽  
Modified Asphalt ◽  
Static Creep ◽  
Dynamic Creep ◽  
The Impact ◽  
Sem Test

Viscoelasticity property of bitumen is closely related to the service life of bituminous pavement. This paper evaluated the impact of one of the most efficient and widely used nanomaterials in various industries called hydrophobic nanosilica on the viscoelasticity property of bitumen and asphalt mixture. In this paper, three hydrophobic nanosilica modified bitumens and asphalt mixtures were researched by conventional physical properties test, SEM test, FTIR test, DSC test, DSR test, static creep test and dynamic creep test. The results showed that the introduction of hydrophobic nanosilica could strengthen the viscosity of asphalt more effectively and had better dispersion than hydrophilic nanosilica in asphalt. From conventional physical properties test and rheological performance test, hydrophobic nanosilica could weaken the temperature susceptibility of bitumen observably. From DSR test, hydrophobic nanosilica modified asphalt had a lower sensitivity and dependence on temperature and frequency than hydrophilic nanosilica modified asphalt. The Cole–Cole diagrams indicated that hydrophobic nanosilica exhibited good compatibility with asphalt compared with hydrophilic nanosilica. Newly formed chemical bonds were found in the hydrophobic nanosilica modified asphalt and its mixture with stone according to SEM test, FTIR test, and DSC test, which is the biggest difference from the modification mechanism of hydrophilic nanosilica modified asphalt. Through static and dynamic creep test, it found that the addition of hydrophobic nanosilica can significantly reduce the creep strain at the same temperature.

The Preparation Technology and Performance Study of SBS and Rubber Powder Composite Modified Asphalt

2013 ◽  
Vol 361-363 ◽  
pp. 1617-1620 ◽  
Author(s):  
Li Liu ◽  
Zhao Hui Liu ◽  
Sheng Li
Keyword(s):  
Softening Point ◽  
Elastic Recovery ◽  
Powder Composite ◽  
Performance Study ◽  
Preparation Technology ◽  
Rubber Powder ◽  
Modified Asphalt ◽  
And Performance

Taking SBS and rubber powder as modifier, adopting the dosage of 4%, 5%, and 6% of SBS while 2%, 4%, 6% of rubber powder to prepare composite modified asphalt, studied the preparation technology of composite modified asphalt, analyzed the trend of ductility, penetration, softening point and elastic recovery. The results show a certain SBS dosage, with the increase of the rubber powder, ductility decrease while softening point and elastic recovery increase, penetration decrease first and then rise. It can provide reference for the preparation technology and performance study of composite modified asphalt.

scholarly journals Road performance of tourmaline/rubber powder modified asphalt mixture

2019 ◽  
Vol 304 ◽  
pp. 052129
Author(s):  
Hao Fu ◽  
Qian Chen ◽  
Zhi Song ◽  
Xudang Xiao ◽  
Zhentong Fan
Keyword(s):  
Asphalt Mixture ◽  
Rubber Powder ◽  
Modified Asphalt ◽  
Road Performance
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