Performance and Mechanism of Asphalt Modified by Buton-Rock Asphalt and Different Types of Styrene-Butadiene-Rubber

Qu, Fangting; Lv, Songtao; Gao, Junfeng; Liu, Chaochao

doi:10.3390/app10093077

Cited by 17 publications

(10 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A SEM was used to observe the micro-morphology of CEBM cured for 24 h. The 1500×, 3000×, 5000×, and 8000× magnified figures of the sample are shown in Figure 6 . The hydration products of cement mainly include acicular and reticulated hydrated calcium silicate (C-S-H), flaky calcium hydroxide (C-H), and columnar ettringite (C-A-S-H) [ 43 , 44 ]. In Figure 7 a,b, there are many micropores in the CEBM, which are the air voids where water evaporates from the demulsification of emulsified bitumen.…”

Section: Resultsmentioning

confidence: 99%

“…However, it still satisfies the requirement of the Marshall stability of HMA (≥8 kN). The hydration of cement makes use of the free water produced by the demulsification of emulsified bitumen, which accelerates the demulsification of bitumen [16,44]. Emulsified bitumen residues and cement hydration products are the composite binders of the CEBM, which explains why the strength of the mixture increases gradually with the increase of the cement content.…”

Section: Influence Of Cement and Emulsified Bitumen Content On Mechan...mentioning

confidence: 99%

“…Figure 10 shows that the Marshall stability of CEBM increases continuously with the increase of the curing time (0-24 h). In detail, the Marshall stability of CEBM with 8% BCR and 10% cement after 24 h curing is 68.1% and 167.7% higher than that of CEBM after 12 The hydration of cement makes use of the free water produced by the demulsification of emulsified bitumen, which accelerates the demulsification of bitumen [16,44]. Emulsified bitumen residues and cement hydration products are the composite binders of the CEBM, which explains why the strength of the mixture increases gradually with the increase of the cement content.…”

Section: Influence Of Cement and Emulsified Bitumen Content On Mechan...mentioning

confidence: 99%

See 2 more Smart Citations

Research on Design and Performance of Self-Compacting Cement Emulsified Bitumen Mixture (CEBM)

Feng

et al. 2022

Materials

View full text Add to dashboard Cite

To meet the needs of the road industry for maintenance operations, a new cement emulsified bitumen mixture (CEBM) with early-strength, self-compacting, and room-temperature construction characteristics was designed. The strength formation mechanism of CEBM was revealed with a scanning electron microscope (SEM) and the surface free energy (SFE) theory. The mechanical properties and road performance of the CEBM were investigated extensively. The results show that before the demulsification of emulsified bitumen, the SFE of the bitumen–aggregate–water three-phase system was reduced due to the replacement of the bitumen–aggregate interface with water. The adhesion work between the emulsified bitumen and the aggregate is negative, which means the adhesion between the emulsified bitumen and the aggregate will not occur spontaneously due to the existence of water. The liquid emulsified bitumen improves the workability of the mixture and ensures that the mixture can be evenly mixed and self-compacted. After demulsification, the work of adhesion between the residual bitumen and the aggregate is positive, which means residual bitumen and aggregate can bond spontaneously. In addition, the hydration products of cement and aggregate form a skeleton, and the emulsified bitumen film wraps and bonds the cement and aggregate together, creating strength. The emulsified bitumen, cement content, and curing conditions have significant effects on the stability of CEBM. The recommended dosage of emulsified bitumen and cement is 8% and 8–10%, respectively. This material integrates the hardening effect of cement and the viscoelastic performance of bitumen and has good workability, mechanical properties, and road performance. Therefore, the CEBM is technically feasible for application to bitumen pavement.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Influence Of Cement and Emulsified Bitumen Content On Mechan...mentioning

confidence: 99%

Section: Influence Of Cement and Emulsified Bitumen Content On Mechan...mentioning

confidence: 99%

See 1 more Smart Citation

Research on Design and Performance of Self-Compacting Cement Emulsified Bitumen Mixture (CEBM)

Feng

et al. 2022

Materials

View full text Add to dashboard Cite

show abstract

“…However, few studies focused on the applicability of LR materials in road engineering. Fortunately, some researchers successfully employed liquid styrene‐butadiene rubber (LSBR) in road‐pavement systems owing to its desirable plasticity at a low content level 16,17 . Unlike other LRs, the use of LSBRs served as asphalt modifiers have been investigated previously, and remarkable findings have been obtained, which can be used as references for extending the CR‐modified asphalt system.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of liquid rubber content and molecular weight on rheological properties of asphalt

Ma²,

et al. 2021

J of Applied Polymer Sci

View full text Add to dashboard Cite

To evaluate the effect of liquid styrene‐butadiene rubber (LSBR) on the rheological performance of bitumen, LSBRs with molecular weights of 20,000 (LA) and 50,000 g/mol (LB) are blended into the virgin bitumen. The rheological effect regarding LSBR content and the molecular weight of the bitumen was then conducted by dynamic shear rheometer (DSR) test and a bending beam rheometer (BBR) test, respectively. Short‐term and long‐term aging tests were used to simulate the asphalt aging with modification of LSBR, and the variations of asphalts function groups were detected by Fourier Transform Infrared spectroscopy (FT‐IR). Results indicate that LSBR reduces the rutting and ageing resistance of the virgin bitumen. However, the blended LA and LB extensively enhance the crack resistance at low temperatures. Moreover, the LB modifier improves the fatigue performance of the asphalt more evidently, followed by LA, particularly at 2% mixing content (by weight of the virgin). Compared with LA, the added LB causes more deteriorating impact bitumen's rutting resistance, whereas LB increases the crack resistance at low temperatures. Of note, the LB‐modified bitumen exhibits less ageing sensitivity than the LA‐modified bitumen under a short‐term ageing simulation. However, the LA‐modified bitumen is less sensitive to the long‐term ageing test.

show abstract

“…Currently, the crushing of waste tires into rubber powder as a pavement material is a widely accepted treatment technique. Rubber-powder modified cement-based concrete [6,7], asphalt-based concrete [8,9], and polymer concrete [10] have been extensively researched and applied. Epoxy resin concrete is a type of polymer concrete that exhibits excellent characteristics, such as high strength, short curing time, improved durability, and freezing-thawing resistance [11,12].…”

Section: Introductionmentioning

confidence: 99%

Design and Performance of Ultrathin Overlay Epoxy‐Rubber Concrete

Huang

Chen

2021

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

Epoxy-rubber concrete has a big potential to be used for pavement overlays, but there is currently no appropriate epoxy-rubber concrete design method and process. To explore the reasonable mix design process of epoxy-rubber concrete, the ultrathin overlay aggregate gradation and epoxy resin binder with high toughness and durability were selected to carry out the design process investigation of epoxy-rubber concrete. The performance of epoxy-rubber concrete was characterized by vibration compaction, repeated load CBR, porosity, Fort Kentucky, uniaxial compression, bending, rutting, antiskid performance, and noise-reduction performance test. Firstly, the optimum range of the rubber powder replacement rate was determined based on the porosity and deformation characteristics of the aggregate mixture. Then, the amount of epoxy resin binder was further determined based on the porosity and antistripping performance of the epoxy-rubber concrete. Finally, the mechanical properties, road performance, and functions of epoxy-rubber concrete were comprehensively considered to determine the optimum rubber power replacement rate obtaining the composition design of epoxy-rubber concrete. The results showed that adding rubber powder decreased the elastic modulus and plastic deformation of the mineral structure, enhancing the suitability of the mixture for flexible road pavements. However, when the replacement rate increased to a specific range, the rubber particles significantly interfered with the mineral material, worsening the stability of the structure. Therefore, it was preliminarily determined that the reasonable replacement rate of rubber powder was 30–50%. The ultrathin overlay epoxy-rubber concrete exhibited excellent antistripping performance, and its porosity increased with the epoxy resin dosage. The optimum epoxy content was 6.5% at 4.17% porosity. Within the preliminarily determined replacement rate range of rubber particles, as the replacement rate increased, the flexibility, high-temperature stability, antiskid performance, and shock and noise resistance of the mixture increased, but the compressive and flexural tensile strength values decreased. The integrated properties of the ultrathin overlay epoxy-rubber concrete indicated that the best replacement rate of rubber powder was 45%. In this paper, the replacement rate range of the rubber powder was initially determined based on the gradation composition of the mixture, which avoids blind determination of the replacement rate. And the composition of the concrete was obtained comprehensively by the performance and function of the epoxy-rubber concrete, which is reasonable and reliable. The epoxy-rubber concrete design method proposed in this paper can promote the application the epoxy-rubber concrete in pavement overlay engineering.

show abstract

Performance and Mechanism of Asphalt Modified by Buton-Rock Asphalt and Different Types of Styrene-Butadiene-Rubber

Cited by 17 publications

References 39 publications

Research on Design and Performance of Self-Compacting Cement Emulsified Bitumen Mixture (CEBM)

Research on Design and Performance of Self-Compacting Cement Emulsified Bitumen Mixture (CEBM)

Evaluation of liquid rubber content and molecular weight on rheological properties of asphalt

Design and Performance of Ultrathin Overlay Epoxy‐Rubber Concrete

Contact Info

Product

Resources

About