Performance evaluation of rubberized and SBS modified porous asphalt mixtures

Shirini, Bahram; Imaninasab, Reza

doi:10.1016/j.conbuildmat.2016.01.006

Cited by 132 publications

(45 citation statements)

References 17 publications

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“…Estudos científicos têm mostrado que a utilização de asfaltos modificados por polímeros propicia uma melhoria na resistência à formação de trilhas de roda e ao trincamento por fadiga, aumento da resistência ao envelhecimento, diminuição da susceptibilidade térmica, melhor característica coesiva e adesiva, elevação do ponto de amolecimento, dentre outros benefícios [9,10].…”

Section: Introductionunclassified

Dosagem de mistura asfáltica com CAP 50/70 modificado com borra de petróleo

2016

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Modificadores de ligantes asfálticos, tais como polímeros, borrachas de pneus moídos, borra oleosa de petróleo, dentre outros, vêm sendo estudados para melhor adequação destes às condições de uso. Contrariamente aos puros, os ligantes modificados apresentam comportamento reológico não-Newtoniano. Por essa razão, a dosagem de mistura asfáltica com ligantes modificados apresenta restrições às metodologias convencionais. Neste estudo, a modificação do ligante asfáltico CAP 50/70 foi realizada utilizando-se 10% e 20%, em massa, de masterbatch’s de borracha de pneus inservíveis com borra de petróleo, na proporção 15/85 (CM1) e 85/15 (CM2), seguindo a Norma DNER – ME 043/95. Os resultados mostraram que é possível dosar misturas asfálticas com o CAP 50/70 modificado com borra de petróleo seguindo-se a metodologia da referida Norma.

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Section: Introductionunclassified

Dosagem de mistura asfáltica com CAP 50/70 modificado com borra de petróleo

2016

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“…At present, traditional rubberized asphalt has the following shortcomings during use: it is easily degraded at high temperatures and cannot be stored for a long time [ 18 , 19 ]. Rubberized asphalt produced on-site is time limited; after a certain point, its performance will be significantly reduced—e.g., in a low construction environment [ 8 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Laboratory Investigation of Rubberized Asphalt Using High-Content Rubber Powder

Wang

et al. 2020

Materials

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Rubberized asphalt (RA) has been successfully applied in road engineering due to its excellent performance; however, the most widely used rubber content is about 20%.To improve the content of waste rubber and ensure its performance, seven rubberized asphalts with different powder content were prepared by high-speed shearing. Firstly, penetration, softening point, and ductility tests were carried out to investigate the conventional physical features of high-content rubberized asphalt (HCRA). Then, the dynamic shear rheometer test (DSR) was conducted to estimate the high-temperature rheological properties. The bending beam rheometer test (BBR) was carried out to evaluate the low-temperature rheological performance. Finally, combined with the macroscopic performance test, the modification mechanism was revealed by the Fourier transform infrared reflection (FTIR) test, and scanning electron microscope (SEM) analysis was used to observe the microscopic appearance before and after aging. The results show that rubberized asphalt has excellent properties in high- and low-temperature conditions, and fatigue resistance is also outstanding compared with neat asphalt. As the crumb rubber content increases, it is evident that the 40% RA performance is the best. The low-temperature properties of HCRA are better than the traditional 20% rubberized asphalt. This study provides a full test foundation for the efficient utilization of HCRA in road engineering.

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“…However, despite all this, the molecular structure will still suffer from the destruction from the outside environment no matter whether SBS exists in bitumen or not, as temperature, ultraviolet radiation and oxygen are major determinants leading to its structural failure [ 9 , 10 , 11 , 12 , 13 ]. Hence, large amounts of waste SBS-modified bitumen will be increasingly produced due to the performance deterioration of SBS after a long period of use [ 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Molecular Structure and Thermal Properties of Thermo-Oxidative Aged SBS in Blends and Their Relations

et al. 2017

Materials

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Tri-block copolymer styrene–butadiene (SBS) is extensively applied in bituminous highway construction due to its high elasticity and excellent weather resistance. With the extension of time, tri-block structural SBS automatically degrades into bi-block structural SB- with some terminal oxygen-containing groups under the comprehensive effects of light, heat, oxygen, etc. In this paper, the effects of aging temperature, aging time and oxygen concentration on the molecular structure of thermo-oxidative aged SBS were mainly investigated using Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS), and the correlation between oxygen-containing groups and thermal properties (TG–DTG) was further discussed. The FTIR and XPS results show that rapid decomposition of SBS will occur with increments of aging temperature, aging time and oxygen concentration, and a large number of oxygen-containing groups such as –OH, C=O, –COOH, etc. will be formed during thermo-oxidative aging. In short-term aging, changes in aging temperature and oxygen concentration have a significant impact on the structural damage of SBS. However, in long-term aging, it has no further effect on the molecular structure of SBS or on increasing oxygen concentration. The TG and DTG results indicate that the concentration of substances with low molecular weight gradually increases with the improvement of the degree of aging of the SBS, while the initial decomposition rate increases at the beginning of thermal weightlessness and the decomposition rate slows down in comparison with neat SBS. From the relation between the XPS and TG results, it can be seen that the initial thermal stability of SBS rapidly reduces as the relative concentration of the oxygen-containing groups accumulates around 3%, while the maximum decomposition temperature slowly decreases when the relative concentration of the oxygen-containing groups is more than 3%, due to the difficult damage to strong bonds on the molecular structure of aged SBS.

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Performance evaluation of rubberized and SBS modified porous asphalt mixtures

Cited by 132 publications

References 17 publications

Dosagem de mistura asfáltica com CAP 50/70 modificado com borra de petróleo

Dosagem de mistura asfáltica com CAP 50/70 modificado com borra de petróleo

Laboratory Investigation of Rubberized Asphalt Using High-Content Rubber Powder

Investigation of Molecular Structure and Thermal Properties of Thermo-Oxidative Aged SBS in Blends and Their Relations

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