Effects of warm mix asphalt additives on bonding potential and failure pattern of asphalt-aggregate systems using strength and energy parameters

Habal, Ayyanna; Singh, Dharamveer

doi:10.1080/10298436.2019.1623399

Cited by 37 publications

(7 citation statements)

References 22 publications

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“…The interactions between asphalt and the steel slag aggregate are important in the formation of an asphalt mixture's structure and are directly related to the strength, temperature stability, water stability, and aging speed of an asphalt mixture [1][2][3][4][5]. The interfacial strength between the asphalt and steel slag significantly affects the quality stability of steel slag-asphalt mixtures [6][7][8][9]. The phase structure, interaction, and adhesion properties of asphalt mixtures have been extensively explored using various methods such as kinetics, thermodynamics, and surface physical chemistry [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

The Interfacial Adhesion Performance and Mechanism of a Modified Asphalt–Steel Slag Aggregate

Liu

Zhu

et al. 2020

Materials

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The interfacial adhesion between asphalt and steel slag aggregate is a decisive factor in the formation of an asphalt-steel slag mixture and significantly affects the quality stability of steel slag-asphalt mixtures. In this study, the adhesion between an asphalt and steel slag aggregate, the interfacial microstructure, the adsorption and desorption characteristics, and chemical reactions were, respectively, explored by a PosiTestAT-A adhesion puller, a scanning electron microscope, a net adsorption test, an infrared spectrometer, and a dynamic shear rheometer. The mechanism of adhesion between the asphalt and steel slag aggregate was analyzed from the perspectives of physical adsorption and chemical reactions. The results showed that different factors had different effects on the adhesion of asphalt-steel slag aggregate interface. The freeze-thaw cycle and steel slag aggregate particle size had significant effects on interfacial adhesion, while the asphalt heating temperature, water bath time, and stirring time had relatively weak effects on interfacial adhesion. Compared to a limestone aggregate, the steel slag-asphalt mixture had greater adhesion and better adhesion performance because the pits and textures on the surface of the steel slag aggregate produced a skeleton-like effect that strengthened the phase strength of the asphalt-slag aggregate interface, thereby improving the adhesion and increasing the physical adsorption between the asphalt and steel slag aggregate. In addition, due to the N-H stretching vibrations of the amines and amides, as well as SiO-H stretching vibrations, a chemical reaction occurred between the asphalt and steel slag aggregate, thus improving the adhesion performance between the asphalt and steel slag. Based on the shape of the adsorption isotherm, it was determined that the adsorption type was multi-molecular layer adsorption, indicating that the adhesion between the asphalt and steel slag mainly involved physical adsorption. the asphalt and the aggregate are mainly physical interactions. Using an adhesion test, Podoll [14] proved that the peeling of asphalt occurs at the aggregate interface. Ling [15] carried out an adhesion test with asphalt and stone and analyzed the variations of adhesion with shear rate and temperature tests. Tarrer [16] indicated that when steel slag comes into contact with asphalt, the former has good adhesion characteristics since steel slag is an alkaline aggregate, and asphalt contains acidic groups. By exploring the asphalt-filler adhesion characteristics by infrared spectroscopy, Shin [17] found that asphalt around the filler carries polar functional groups. Xu [18] studied the combustion characteristics of asphalt by combining thermogravimetry with infrared spectroscopy.Other researchers have indicated that the angularity coefficient and fractal dimension of the surface texture of a steel slag aggregate have a linear positive correlation with the phase strength of the asphalt-aggregate interface. The greater the surface roughness of the steel slag a...

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Section: Introductionmentioning

confidence: 99%

The Interfacial Adhesion Performance and Mechanism of a Modified Asphalt–Steel Slag Aggregate

Liu

Zhu

et al. 2020

Materials

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“…When the strain is smaller, the crack resistance of the basalt fiber reinforced mixture is better. This is because, in the AC-13 specimen, the basalt fiber with a diameter of 7 μm has more specific surface area [ 38 , 39 ], and at the same time its number is the largest, and the total contact area with asphalt is the largest. It not only greatly improves the adhesion of the asphalt mortar, but also greatly dissipates the concentrated stress, thereby delaying the speed of crack propagation.…”

Section: Resultsmentioning

confidence: 99%

“…The ANOVA Tukey’s HSD analysis of indicators was carried out based on the conclusions obtained from the above experiments [ 39 ]. In order to ensure the uniformity of the sample conditions, the FI index values (based on the index obtained by the SCB test) of the four kinds of asphalt mixtures were selected to analyze the average crack propagation rate and fracture toughness, respectively.…”

Section: Resultsmentioning

confidence: 99%

Effects of Fiber Diameter on Crack Resistance of Asphalt Mixtures Reinforced by Basalt Fibers Based on Digital Image Correlation Technology

et al. 2021

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It is now more popular to use basalt fibers in the engineering programs to reinforce the crack resistance of asphalt mixtures. However, research concerning the impact of the basalt fiber diameter on the macro performance of AC-13 mixtures is very limited. Therefore, in this paper, basalt fibers with three diameters, including 7, 13 and 25 μm, were selected to research the influences of fiber diameter on the crack resistance of asphalt mixtures. Different types of crack tests, such as the low temperature trabecular bending test (LTTB), the indirect tensile asphalt cracking test (IDEAL-CT), and the semi-circular bend test (SCB), were conducted to reveal the crack resistance of AC-13 mixtures. The entire cracking process was recorded through the digital image correlation (DIC) technique, and the displacement cloud pictures, strain, average crack propagation rate (V) and fracture toughness (FT) indicators were used to evaluate the crack inhibition action of the fiber diameter on the mixture. The results showed that the incorporation of basalt fiber substantially improved the crack resistance, slowed down the increase of the displacement, and delayed the fracture time. Basalt fiber with a diameter of 7 μm presented the best enhancement capability on the crack resistance of the AC-13 mixture. The flexibility index (FI) of the SCB test showed a good correlation with V and FT values of DIC test results, respectively. These findings provide theoretical advice for the popularization and engineering application of basalt fibers in asphalt pavement.

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“…The optimum dosage of Rediset recommended by the literature was 2% of base binder weight for conventional asphalt binder [24][25][26]. Rediset used in this study was incorporated into asphalt 60/70 as control sample namely 0%.…”

Section: Sample Preparationmentioning

confidence: 99%

Physical properties of palm oil boiler ash modified bitumen with Rediset

Akhir

Idiajir

Gungat

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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This study examines the physical properties of a 60/70 penetration grade bitumen modified using warm mix asphalt (WMA) additive, Rediset and palm oil boiler ash (POBA) as a modifier. Modified binders were prepared by adding 2% of Rediset with different POBA contents (3, 5, 7, and 9%) through wet mixing process. Physical properties of modified bituminous binder were obtained from penetration, softening point, rotational viscosity and ductility tests. The addition of 7% POBA in WMA binder has the best characteristics in term of its physical properties. The penetration values, softening point temperatures and ductility characteristics show inconsistent patterns. However, the rotational viscosity of each combination had decreased with the increment of temperature even though the trend was not significantly constant. Penetration index (PI) showed an increment with 3 and 5% and decrement pattern on 7 and 9% as well as penetration viscosity number (PVN) showing an inconsistent decrement with the addition of POBA. From the results, it can be concluded that using POBA in WMA binder for pavement construction is a viable option and can be further investigated.

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Effects of warm mix asphalt additives on bonding potential and failure pattern of asphalt-aggregate systems using strength and energy parameters

Cited by 37 publications

References 22 publications

The Interfacial Adhesion Performance and Mechanism of a Modified Asphalt–Steel Slag Aggregate

The Interfacial Adhesion Performance and Mechanism of a Modified Asphalt–Steel Slag Aggregate

Effects of Fiber Diameter on Crack Resistance of Asphalt Mixtures Reinforced by Basalt Fibers Based on Digital Image Correlation Technology

Physical properties of palm oil boiler ash modified bitumen with Rediset

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