Influence of Different Modifiers on Bonding Strength and Rheological Performance of Bitumen Emulsion

Pan, Changluan; Liang, Deqiang; Mo, Liantong; Riara, Martin M.; Lin, Juntao

doi:10.3390/ma12152414

Cited by 15 publications

(3 citation statements)

References 21 publications

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“…The content of bitumen in asphalt granulate is 4.63% of the mass of the mineral part. At present, a rather great interest of researches of cold reclaimed mixes is riveted to modifiers based on epoxy resins [17][18][19][20][21][22][23][24][25][26] and styrene-acrylates [27][28][29][30][31][32].…”

Section: Initial Materials and Experimental Compositions Accepted Formentioning

confidence: 99%

Fatigue resistance of modified cold reclaimed mixes with 100% content of recycled asphalt pavement (RAP)

Zankavich¹,

Khroustalev

Veranko³

et al. 2020

SN Appl. Sci.

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This study is devoted to finding a solution to an important problem of increasing the accuracy of assessing the fatigue stability of composites based on recycled asphalt concrete. Another problem for solving was a selecting optimal and effective ways to improve their physical-mechanical properties during modification by polymers. For experimental work, a new indicator reflecting the strength of elastic structural bonds and the specific number of viscoplastic bonds was used as a criterion for fatigue stability of bituminous-cement composites. As shown by the results of the research, fatigue (cyclic) stability has an increasing trend with the growth of these parameters. As a result of processing data from experimental studies of the structural characteristics of composites, a comparative analysis of the effectiveness of modification of cold recycled mixes by styrene acrylate and epoxy resin was performed. It was established that the composites modified with styrene acrylates have a higher relaxation ability, which is reflected in the increase in the number of cycles to failure when testing for cyclic stability. It is also noted that with an increase in the content of epoxy resin in the composition of mixes, the increase in stiffness occurs much more strongly in comparison with an increase in their relaxation ability. At the same time, the efficiency of modification of cold recycled mixes with epoxy resins is significantly increased with the preliminary preparation of asphalt granulate (RAP), for example, during its plasticization with soy epoxidized oil. This work also allowed us to outline some areas of development of the methodological foundations for assessing the cyclic and fatigue stability of composites based on cold recycled mixes. Keywords Fatigue resistance • Recycled asphalt pavement (RAP) • Modified cold reclaimed mixes • Styrene-acrylic water dispersion • Water dispersion of epoxy resin • Epoxidized soybean oil * Vitali Zankavich,

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Section: Initial Materials and Experimental Compositions Accepted Formentioning

confidence: 99%

Fatigue resistance of modified cold reclaimed mixes with 100% content of recycled asphalt pavement (RAP)

Zankavich¹,

Khroustalev

Veranko³

et al. 2020

SN Appl. Sci.

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“…As machine-made sand content increases, the mechanical properties of CRME are also enhanced [8]. The contact angles and adhesive energy between the aggregates and asphalt significantly impact the water stability and fatigue performance of CRME [9], and the emulsified asphalt type has an appreciable effect on the adhesion between aggregates in a mixture [10]. In addition, intergranular mode fracture is the most common failure of mixtures for the weakness of the asphalt-aggregate interface [11].…”

Section: Introductionmentioning

confidence: 99%

Effect of Fine Aggregate Gradation on Macro and Micro Properties of Cold Recycling Mixture Using Emulsified Asphalt

Zhang

et al. 2022

Coatings

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In order to explore the influence of fine aggregate on the macro and micro properties of cold recycling mixture using emulsified asphalt (CRME), mechanical and microscopic property tests were carried out. The indirect tensile strength (ITS), unconfined compressive strength (UCS) and triaxial shear strength of different fine aggregate gradation was measured for analyzing the effects of fine aggregate on the mechanical strength, triaxial shear resistance and fracture energy of CRME. Meanwhile, the surface morphologies and air voids distribution of different CRME were observed by scanning electron microscopy (SEM) and X-ray computed tomography (X-ray CT). The results show that fine aggregate has a significant effect on the mechanical strength and shear resistance of CRME. With the same water and asphalt content, the fracture energy and failure strain of the mixture with less fine aggregate (G3-2) decreased by 16.2% and 18.2%, respectively. The less content of powder there was, the fewer cement hydration products there were due to some cement being coated by emulsified asphalt and the “cement hydration products fiber” length being shorter. Approximately 70% of the AFt hydration products in the G3-2 mixture were in the range of 1–4 μm, while those in the G1 mixture were in the range of 4–8 μm. With the increase in filler content, the number of air voids in the volume range of 0.5 mm3 ≤ V < 5 mm3 in CRME decreased, and the number of air voids in the volume range of V < 0.5 mm3 significantly increased, while the equivalent radius of air voids decreased slightly with the increase in filler content.

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“…erefore, it has been widely used in different pavement applications, such as tack coat, chip-sealing, microsurfacing, and cold asphalt mixtures. During the past decades, AE is becoming a viable alternative to hot-mix asphalt, which makes asphalt pavements more economic, less polluting, lower energy consumption, and longer construction season [2,3]. However, confronted with the severe distress and deteriorates of pavement that caused by the recent significant increase in traffic volume and tire pressure, higher requirements of AE have been raised by modern engineering in aspects like sufficient strength and thermal stability at high temperature, necessary flexibility and plasticity at low temperature, adequate antiaging ability during service, and high adhesion strength to aggregates and surfaces of structures [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Performance Assessment of Asphalt Emulsion Modified by the Fabricated SBS Latex

Liang

Gao

et al. 2020

Advances in Civil Engineering

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Polymer modified asphalt emulsion (PMAE) has recently been proven to be one of the most effective methods to overcome the common distress of asphalt surface treatments, such as abrasion, rutting, ravelling, and poor durability. Because of the limited research studies about the preparation of PMAE using SBS latex, a new method to prepare SBS latex was developed and the feasibility of using it in preparing SBS latex modified asphalt emulsion (SBS-LMAE) was verified in this study. The optimized swelling parameters for linear SBS solutions were swelling 24 h at the temperature of 50°C with the toluene/SBS (T/S) mass ratios of 2.5 : 1 to 2.0 : 1 which was determined according to the analysis of viscosity and Tyndall effect. After that, the SBS latex with favorable dispersivity and stability was successfully fabricated with the T/S ratio of 2.0 : 1. At last, the well-specified SBS-LMAE was prepared using the fabricated latex and tested for its conventional performances and microstructure. The results show that the SBS-LMAE samples all meet the main requirements of PMAE for microsurfacing and possess appropriate uniformity and stability.

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Influence of Different Modifiers on Bonding Strength and Rheological Performance of Bitumen Emulsion

Cited by 15 publications

References 21 publications

Fatigue resistance of modified cold reclaimed mixes with 100% content of recycled asphalt pavement (RAP)

Fatigue resistance of modified cold reclaimed mixes with 100% content of recycled asphalt pavement (RAP)

Effect of Fine Aggregate Gradation on Macro and Micro Properties of Cold Recycling Mixture Using Emulsified Asphalt

Preparation and Performance Assessment of Asphalt Emulsion Modified by the Fabricated SBS Latex

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