Aging Resistance of Silica Fume/Styrene-Butadiene-Styrene Composite-Modified Asphalt

Zhu, Jingrong; Xu, Wenyuan

doi:10.3390/ma14216536

Cited by 3 publications

(1 citation statement)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this work, carbonyl and butadiene functional groups were mainly analyzed. The former was used to characterize the oxidation degree of the asphalt binders, and the latter was used to characterize the degradation of the polymer [ 14 , 15 ]. Figure 4 shows the infrared spectrum contrast map of four kinds of unaged asphalt binder.…”

Section: Resultsmentioning

confidence: 99%

Investigation of the Properties of High-Viscosity Modified Asphalt Binder under Hygrothermal Environments

Xing,

Li,

Zhou

et al. 2024

Materials

View full text Add to dashboard Cite

High-viscosity modified asphalt binder (HVMA) is used widely as a polymer-modified binder in porous asphalt pavement because it can improve the cohesiveness of the asphalt mixture. However, because of the high voidage in the mixture, HVMA is vulnerable to aging induced by temperature, oxygen, water, sunlight, and other climatic conditions, which degrades the performance of pavement. The properties of asphalt binder are affected adversely by the effects of hygrothermal environments in megathermal and rainy areas. Therefore, it is essential to study the aging characteristics of HVMA under the influence of hygrothermal environments to promote its application as a high-viscosity modifier. A hygrothermal cycle aging test (HCAT) was designed to simulate the aging of HVMA when rainwater was kept inside of the pavement after rainfall in megathermal areas. One kind of base bitumen and three kinds of HVMA (referred to as SBS, A, and B, respectively) were selected in this study. Short-term aging tests, hygrothermal cycling aging tests, and long-term aging tests were performed on the base bitumen and three kinds of modified asphalt binder. Fourier-transform infrared spectroscopy (FTIR), thermo-gravimetric analysis (TGA), and dynamic shear rheological (DSR) tests were used to evaluate the properties of the binders on the micro and macro scales. By comparing the index variations of the four binders before and after aging, the effects of the hygrothermal environment on the properties of HVMA were studied. It was found that the effects of the hygrothermal environment expedited the decomposition of the polymer and the formation of carbonyl groups compared with the TFOT and PAV test, which TGA confirmed further. Moreover, the thermal stability of the samples was improved after HCAT. In addition, the master curves of the complex modulus showed that hygrothermal cycles made the high-temperature rutting resistance of asphalt binder increase significantly. All of the results above verified that the effect of hygrothermal cycling could accelerate the aging of HVMA and shorten its service life.

show abstract

Section: Resultsmentioning

confidence: 99%

Investigation of the Properties of High-Viscosity Modified Asphalt Binder under Hygrothermal Environments

Xing,

Li,

Zhou

et al. 2024

Materials

View full text Add to dashboard Cite

show abstract

Modification effects of nanosilica on asphalt binders: A review

Dai,

Liang,

et al. 2023

Nanotechnology Reviews

View full text Add to dashboard Cite

Nanosilica (NS) may be obtained as a by-product in several industrial processes and is associated with high availability and affordability among other nanoadditives. NS has been used for asphalt modification, and improvement in high-temperature performance and several other physical properties has been reported. However, due to the wide varieties and intrinsic variability of asphalt materials, concerns have been raised about the reproducibility of some conclusions, and therefore, a review was conducted. According to the results, NS additives with a purity of over 99% were usually used for modification and the specific surface area was over 100 m2/g, leading to the superior absorption of asphalt and thus improvement in rutting resistance of the mixtures. Due to a lack of guidance for the blending procedures, inconsistency exists among studies in the shear speed, blending duration, and temperature, leading to possible excessive blending and unnecessary energy and time consumption. Rises in NS concentration would cause higher softening point and rotational viscosity, and therefore elevated temperatures for mixing and paving, but penetration would be reduced. According to rheological evaluations, with the rise of NS concentration, the rutting parameter would increase, indicating an improvement in the high-temperature performance, but the low-temperature performance may deteriorate.

show abstract

Qualitative Evaluation for Asphalt Binder Modified with SBS Polymer

Al-Nawasir,

Al-Humeidawi

2023

Tikrit j. eng. sci.

View full text Add to dashboard Cite

Solutions for safer, more durable infrastructure are required in light of increasing traffic and severe weather in Iraq. The most significant road conservation and maintenance challenges are the pavement's low resistance to dynamic loads and short service life. As a result, vast sums of money are spent annually to enhance the road service capacities in Iraq. Thermoplastic electrometric polymers for bitumen modification create long-lasting, cost-effective roadways. This study aims to determine how the mechanical properties of neat asphalt binder change when styrene butadiene styrene (SBS) is added as a modifier. The current research investigates adding three percentages of SBS (3, 5, and 7% of the weight of bitumen). Both neat and polymer-modified bitumen (PMB) were subjected to a series of physical laboratory and Superpave tests, including a dynamic shear rheometer tester (DSR) and a storage stability test. In addition, a chemical analysis test was conducted to identify any change in the neat binder chemical composition due to the addition of SBS polymer. The results indicated that 5% of SBS polymer was the optimum addition percentage to the local asphalt in Iraq. Additionally, it reduced the susceptibility of bitumen to temperature changes and enhanced its characteristics in all laboratory tests. The obtained PMB significantly improved rutting and fatigue factors compared to the neat asphalt binder. Based on the DSR tester and the storage stability test, the ratio of 5% SBS met the requirements of class PG76-10, used in the central and southern governorates of Iraq. Using SBS polymer on the surface course in Iraq reduces road damage due to the scorching summer sun, reduces the likelihood of rutting and fatigue cracking, and works well in hot regions, resulting in roads that last longer, provide comfortable riding, and require less maintenance.

show abstract

Aging Resistance of Silica Fume/Styrene-Butadiene-Styrene Composite-Modified Asphalt

Cited by 3 publications

References 22 publications

Investigation of the Properties of High-Viscosity Modified Asphalt Binder under Hygrothermal Environments

Investigation of the Properties of High-Viscosity Modified Asphalt Binder under Hygrothermal Environments

Modification effects of nanosilica on asphalt binders: A review

Qualitative Evaluation for Asphalt Binder Modified with SBS Polymer

Contact Info

Product

Resources

About