Investigating influence of mineral filler at asphalt mixture and mastic scales

Diab, Aboelkasim; Enieb, Mahmoud

doi:10.1016/j.ijprt.2017.10.008

Cited by 70 publications

(26 citation statements)

References 23 publications

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“…According to Superpave method of mix design, the maximum amount of filler (particles smaller than 0.075mm) to be used in an asphalt concrete is 10% by weight of aggregate [22]. In addition to limiting the maximum amount of filler incorporated into asphalt concrete, the current design standard requires incorporation of mineral filler be limited to a ratio in a range of 0.6-1.2 by mass of filler to bitumen [23], [24], and, simultaneously, the gradation of the overall aggregate (including fillers) must fall within the specification limits [25]. For producing ECAC, Wu, et al, [2] maintained a bitumen-to-filler ratio of around 1:1 and their asphalt concrete specimens were composed of 6.5-7.5% bitumen, 7.4% of fillers (consisting of 4 limestone powder and conductive fillers) and 85.6% basalt aggregates.…”

Section: Specimen Fabricationmentioning

confidence: 99%

Electrically-conductive asphalt mastic: Temperature dependence and heating efficiency

et al. 2018

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Asphalt mastic, a pitch-matrix composite, consists of bitumen and mineral fillers (very fine aggregates), that fills the voids created by coarser aggregates in asphalt concrete. In this study, asphalt mastic was modified with carbon fiber (CF) and graphite powder (GP) to produce single-phase (containing only CF) and two-phase (containing both CF and GP) electrically-conductive asphalt mastic (ECAM) for anti-icing and deicing applications. Volume resistivities of ECAMs were measured at two different temperatures and the influence of temperature on electrical conductivity was evaluated, revealing that reduction in temperature enhances the ECAM's electrical conductivity. After analyzing the volume resistivity data for both single-phase and twophase ECAM specimens, heat generation efficiency of single-phase ECAM was investigated at a conductive material dosage slightly higher than the optimum. The heat generation efficiency was evaluated at a belowfreezing temperature by performing active infrared thermography (IRT). Based on the active IRT analysis results, it was found that single-phase ECAM at the selected CF content is capable of generating enough heat for melting ice and snow or preventing accumulation of snow and formation of ice.

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Section: Specimen Fabricationmentioning

confidence: 99%

Electrically-conductive asphalt mastic: Temperature dependence and heating efficiency

et al. 2018

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“…Aggregates interlock to form a supporting skeletal structure in an asphalt mixture. Fillers are mixed with asphalt into a mastic that fills in the skeletal voids, which is the key to ensuring the cohesion of the mixture [5,6]. Kollmann et al [7] used a cohesive zone model to simulate the initiation and propagation of microcracks in an asphalt mixture in an indirect tensile test.…”

Section: Introductionmentioning

confidence: 99%

Experimental Evaluation of the Influence of Aggregate Strength on the Flexural Cracking Behavior of Epoxy Asphalt Mixtures

Wei

et al. 2020

Materials

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The flexural cracking resistance of an asphalt concrete mixture used in a steel bridge deck pavement needs to be higher than that of one used in ordinary pavement. In this study, mechanical experimental tests were used to evaluate the influence of the aggregate strength on the flexural cracking behavior of epoxy asphalt concrete (EAC). The aggregate fracture area of beam cross sections was quantitatively analyzed by digital image processing, and crack propagation in the mixture was analyzed using fracture mechanics theory. The bending test results showed that the EAC containing high-strength aggregates exhibited the highest flexural cracking resistance among all of the aggregate mixtures under the same conditions. The use of high-strength aggregates led to a reduction in the aggregate fracture area, thereby improving the flexural cracking resistance of the mixture. The aggregate strength had a significant influence on the flexural cracking propagation behavior of the mixture. Fatigue test results at strain-controlled levels of 600–1200 με and 15 °C showed that the aggregate strength had no evident influence on the fatigue properties of the EAC. It is recommended that high-strength aggregates are used to increase the fracture resistance of aggregates and the flexural crack resistance of EACs.

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“…In addition to mineral aggregates in the asphalt mixture, the filler is one of the major components of the asphalt mixture, which constitutes from a few to several percent. The filler and asphalt mixed together form the so-called asphalt mastic, the properties of which significantly affect the adhesion of mineral aggregates and asphalt as well as the performance of final asphalt mix [3][4][5]. The use of the right type and amount of filler improves the asphalt pavement properties such as stability, durability or even skid resistance.…”

Section: Introductionmentioning

confidence: 99%

Application of Zeolite Tuffs as Mineral Filler in Warm Mix Asphalt

2019

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Zeolite materials are used in the warm mix asphalt technology as an asphalt foaming additive, which partially replaces the filler. This article analyzes the influence of the zeolite and other fillers addition on the properties of mastic asphalt. In the research, 35/50 penetration grade asphalt and three types of fillers were used: lime filler (L), zeolite tuff (clinoptilolite) (C), hydrated lime (H) and their mixed combinations (C:L in 1:1 and 1:3 proportions as well as C:L:H in 2:2:1 ratio). The characteristics of the materials included: chemical analysis, phase composition and particle size distribution. The following properties were determined on the asphalt mastic samples: penetration, softening point, penetration index, dynamic viscosity and stiffening measured by softening point increase. It was found that clinoptilolite could partially replace the traditional lime filler, without a negative impact on the asphalt mastic properties. Additionally, the hydrated lime inclusion should have a positive effect on the frost resistance of an asphalt mix.

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Investigating influence of mineral filler at asphalt mixture and mastic scales

Cited by 70 publications

References 23 publications

Electrically-conductive asphalt mastic: Temperature dependence and heating efficiency

Electrically-conductive asphalt mastic: Temperature dependence and heating efficiency

Experimental Evaluation of the Influence of Aggregate Strength on the Flexural Cracking Behavior of Epoxy Asphalt Mixtures

Application of Zeolite Tuffs as Mineral Filler in Warm Mix Asphalt

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