Internal structure evolution of asphalt mixtures during freeze–thaw cycles

Xu, Huining; Guo, Wei; Tan, Yiqiu

doi:10.1016/j.matdes.2015.07.073

Cited by 143 publications

(55 citation statements)

References 29 publications

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“…Air voids of CRSMA, CRDSMA, and CRSSMA are all below 7% after 10 times of F-T actions. Air voids increase with the increasing of F-T cycles, which agrees with the result obtained by Xu et al [49]. Air void of CRSMA increases from 4.26% to 6.71% after 10 times of F-T cycles compared with that without F-T effect.…”

Section: Air Voidssupporting

confidence: 91%

“…The reasons lie in that stiffness modulus is used to evaluate the bearing capacity of mixtures. Formation of microcrack under F-T action changes the internal structure and weakens its integrity of asphalt mixture [49], which reduces the bearing capacity. With the increasing of F-T cycles, the influence of internal damage is more obvious.…”

Section: Itsm Resultsmentioning

confidence: 99%

“…It increases from 4.08% to 6.35% for CRDSMA and 4.09% to 6.01% for CRSSMA. The reasons lie in that F-T cycles can lead to not only expansion of existing voids but also formation of new voids [49]. Furthermore, air voids of CRSMA are generally larger than CRDSMA or CRSSMA, while air voids of CRSSMA are the lowest.…”

Section: Air Voidsmentioning

confidence: 99%

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Effects of Diatomite and SBS on Freeze-Thaw Resistance of Crumb Rubber Modified Asphalt Mixture

Wei

Jiao

2017

Advances in Materials Science and Engineering

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Asphalt mixture is susceptible to moisture damage under the effect of freeze-thaw (F-T) cycles. In this paper, crumb rubber (CR) was used to modify stone mastic asphalt (SMA) and the effects of diatomite and styrene butadiene styrene (SBS) on antifreezing performances of crumb rubber modified SMA (CRSMA) were investigated. Regression analysis and modified grey model (MGM) were used to construct the prediction models for properties of modified mixtures. CRSMA, CR and diatomite modified SMA (CRDSMA), and CR and SBS modified SMA (CRSSMA) were prepared in laboratory, respectively. Process of F-T cycles was designed. Air void, indirect tensile strength (ITS), and indirect tensile stiffness modulus (ITSM) were measured to evaluate the antifreezing performances of CRSMA, CRDSMA, and CRSSMA. Results indicate that air voids increase with the increasing of F-T cycles. ITS and ITSM all decrease with the increasing of F-T cycles. The addition of diatomite and SBS can reduce the air void and improve the ITS and ITSM of CRSMA. CRSSMA presents the lowest air void, highest tensile strength, and largest stiffness modulus, which reveals that CRSSMA has the best F-T resistance among three different kinds of mixtures. Moreover, MGM (1, 2) models present more favorable accuracy in prediction of air void and ITS compared with regression ones.

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Section: Air Voidssupporting

confidence: 91%

Section: Itsm Resultsmentioning

confidence: 99%

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Effects of Diatomite and SBS on Freeze-Thaw Resistance of Crumb Rubber Modified Asphalt Mixture

Wei

Jiao

2017

Advances in Materials Science and Engineering

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“…With the high air void content (18%-22%), OGFC offers safety advantages in terms of high skid resistance and no splash or spray in addition to its benefits in noise reduction and water runoff quality enhancement [3][4][5][6]. Despite of the functionality benefits of OGFC, engineering practices have found that the application of OGFC faces three challenges during the service life of pavement, including clogging of air voids [7,8], raveling [9][10][11], and freezing-induced damage in winter [12,13]. These problems apparently reduce pavement durability and affect the functional benefits of OGFC.…”

Section: Introductionmentioning

confidence: 99%

Interface Shear Performance between Porous Polyurethane Mixture and Asphalt Sublayer

et al. 2018

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This paper aims to study interface shear performance between porous polyurethane mixture (PPM) and asphalt mixture with different adhesive materials. Polyurethane, epoxy resin, and SBS (styrene-butadiene-styrene) modified asphalt were selected as adhesive materials to fabricate composite specimens. The interface shear strength and shear fatigue life of composite specimen was measured using inclined shear test. The research results emphasizes that it is necessary to apply adhesive material to the interface between PPM and asphalt mixture, since the untreated interface shear strength is smaller than the ones between two asphalt mixtures. The interface shear strength is affected by the thickness of adhesive layer, temperature, and freezing-thaw condition. In general, the greatest interface shear strength was achieved by using epoxy resin followed by polyurethane and then SBS modified asphalt at 25 • C as the adhesive layer thickness is the same. However, the interface shear strengths of composite specimen with three adhesive materials are similar to each other at high and low temperatures (60 • C and −18 • C) or after freezing-thaw cycles. On the other hand, the composite specimen with epoxy resin as adhesive material has the longest fatigue life; while the SBS modified asphalt has the least fatigue life at 25 • C. The research findings can help select the appropriate adhesive materials and increase the durability and service life of pavement when PPM is used as road surface layer for safety and noise reduction.

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“…Nian performed the freeze-thaw aging test and carried out Fourier transform infrared spectroscopy quantitative to analyze the compositions and rheological properties of asphalt mixture in cold regions [27]. Xu et al studied the internal evolution and analyzed the pore distribution changes and permeability of asphalt mixture during a freeze-thaw cycle with X-ray tomography [28,29]. Wang et al analyzed the pore structure of semi-rigid base materials under freeze-thaw cycles with X-ray tomography [30].…”

Section: Introductionmentioning

confidence: 99%

Pavement Performance Investigation of Nano-TiO2/CaCO3 and Basalt Fiber Composite Modified Asphalt Mixture under Freeze‒Thaw Cycles

Gong

Tian

et al. 2018

Applied Sciences

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The objective of this research is to evaluate the pavement performance degradation of nano-TiO 2 /CaCO 3 and basalt fiber composite modified asphalt mixtures under freeze-thaw cycles. The freeze-thaw resistance of composite modified asphalt mixture was studied by measuring the mesoscopic void volume, stability, indirect tensile stiffness modulus, splitting strength, uniaxial compression static, and dynamic creep rate. The equal-pitch gray prediction model GM (1,3) was also established to predict the pavement performance of the asphalt mixture. It was concluded that the high-and low-temperature performance and water stability of nano-TiO 2 /CaCO 3 and basalt fiber composite modified asphalt mixture were better than those of an ordinary asphalt mixture before and after freeze-thaw cycles. The test results of uniaxial compressive static and dynamic creep after freeze-thaw cycles showed that the high-temperature stability of the nano-TiO 2 /CaCO 3 and basalt fiber composite modified asphalt mixture after freeze-thaw was obviously improved compared with an ordinary asphalt mixture. adhesion between the asphalt binder and sensitive aggregate against moisture damage [4]. Nano-TiO 2 is a commonly used nanomodified material. Shafabakhsh et al. found that nano-TiO 2 could effectively improve the viscosity, anti-rutting, and anti-fatigue properties of asphalt mixture [5]. Sadeghnejad et al. used nanomaterials to modify SMA and the test results showed that nano-TiO 2 could improve the anti-rutting ability and splitting strength ratio and prolong the service life of an asphalt mixture [6]. Nazari et al. evaluated the microstructure and chemical properties of nanocomposite modified asphalt by X-ray and scanning electron microscopy. It was found that the addition of nanomaterials improved the fatigue resistance of asphalt mixture [7].There are many kinds of fiber modifiers used in asphalt mixtures in recent years, such as polyester fiber, lignin fiber, carbon fiber, glass fiber, basalt fiber, etc. Different fiber modifiers have their own advantages and disadvantages. The low-temperature crack resistance of asphalt mixture is the main problem in the frozen region of northeast China. Compared with other fibers, basalt fiber is a mineral fiber that is abundant and easy to obtain in northeast China. Also, it will not cause environmental pollution. Basalt fiber has some advantages in terms of modifying road performance of asphalt mixtures. Zheng studied the pavement performances of basalt fiber, lignin fiber, and polyester fiber modified asphalt mixtures and found that the performance of the basalt fiber modified asphalt mixture was superior to that of the others [8,9]. Morova et al. studied the usability of basalt fibers in order to bear the stresses occurring at the surface layer of pavement and the optimum value of the fiber ratio leading to the optimum stability value was determined [10]. Chen found that basalt fiber, at the optimal fiber content, could improve the water stability and high-temperature stability of the asphalt mi...

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Internal structure evolution of asphalt mixtures during freeze–thaw cycles

Cited by 143 publications

References 29 publications

Effects of Diatomite and SBS on Freeze-Thaw Resistance of Crumb Rubber Modified Asphalt Mixture

Effects of Diatomite and SBS on Freeze-Thaw Resistance of Crumb Rubber Modified Asphalt Mixture

Interface Shear Performance between Porous Polyurethane Mixture and Asphalt Sublayer

Pavement Performance Investigation of Nano-TiO2/CaCO3 and Basalt Fiber Composite Modified Asphalt Mixture under Freeze‒Thaw Cycles

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