Comparative Study on Water Aging of Rubber Asphalt and TOR Rubber Asphat

Wu, Meiping; Shi, Shanshan; Jiang, Dean

doi:10.4028/www.scientific.net/amm.178-181.1383

Cited by 6 publications

(3 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some researchers have indicated that the n-alkanes and n-alkylbenzenes have the highest propensity to penetrate into the CR particles [38]. The viscosities of TRB and TMRB were greater than that of RB because TOR increased the swelling effect in bitumen effectively [46]. The volume of CR particles increased with full swelling, and the light component of bitumen entered into the CR particles, which changed the composition of bitumen.…”

Section: Resultsmentioning

confidence: 99%

A Study on Physical and Rheological Properties of Rubberized Bitumen Modified by Different Methods

et al. 2019

View full text Add to dashboard Cite

Crumb rubber (CR) manufactured from waste tires used in bitumen could improve bitumen performance and reduce environmental pollution. In this work, three different modification methods, pretreatment of the CR particles (microwave activation), warm mix additive (Sasobit), and trans-polyoctenamer (TOR) were used to improve the compatibility of CR with bitumen. Moreover, two other specimens, Sasobit and microwave activated and TOR and microwave activation were fabricated, and their performance was investigated. The softening point, elastic recovery, force ductility, rotational viscosity, temperature sweep, frequency sweep, and multiple stress creep and recovery (MSCR) tests were measured to evaluate the physical and rheological properties of rubberized bitumen. The results showed that TOR improved the physical properties of rubberized bitumen significantly but had a negative effect on the viscosity. Sasobit decreased the viscosity of rubberized bitumen considerably and improved the physical properties of rubberized bitumen moderately. Microwave treatment on CR had a negative effect on the high temperature performance and elastic recoverability of rubberized bitumen, however, attributing to the degradation and devulcanization effect of microwave on CR, the viscosity of rubberized bitumen was improved. From the results of composite modification, the influence of TOR on the performance of rubberized bitumen was more obvious than that of the microwave activation treatment. Moreover, the influence of Sasobit on its performance was less than that of the microwave activation treatment.

show abstract

Section: Resultsmentioning

confidence: 99%

A Study on Physical and Rheological Properties of Rubberized Bitumen Modified by Different Methods

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The second method is the chemical method. Trans-polyoctenamer (TOR) has been used to connect WR with asphalt [31,32]. It revealed that the addition of TOR improved the compatibility of WR in asphalt by the cross-linking action of sulfides between WR and asphaltenes in asphalt.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Storage Stability and Rheological Properties of Asphalt Modified by Activated Waste Rubber Powder

Liu¹,

Wang³

et al. 2021

Materials

View full text Add to dashboard Cite

Segregation of waste crumb rubber powder (WR) modified asphalt binders the large-scale application of WR in asphalt. The method of microwave activation combined with chemical activation (KMWR) was proposed to improve storage stability and rheological properties of WR modified asphalt in this work. Storage stability and rheological properties of virgin asphalt, MWR modified asphalt, and KMWR modified asphalt were comparatively studied by the standard segregation test, bending beam rheometer (BBR) test, and dynamic shear rheometer (DSR) test. The effect of composite activation on waste rubber powder particles was studied by Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), and Brunauer–Emmett–Teller (BET) tests. The main results showed that after the physical and chemical composite activation, the storage stability of waste rubber powder modified asphalt was significantly improved, WR modified asphalt had better crack resistance, better rutting resistance, and better fatigue performance. After physical and chemical activation, WR was desulfurized, and a large number of active groups was grafted on the WR particles.

show abstract

“…Cross-linking agents, such as Trans-polyoctenamer (TOR), a double bond chemical, have been introduced into AR as additives. The primary purpose of this group of additives is the improvement of both the workability and mechanical properties of the AR mixture [6][7][8][9][10][11]. For example, Plemons [6] investigated the effect of the addition of 0.5% TOR by weight of asphalt on AR performance grading.…”

Section: Introductionmentioning

confidence: 99%