Fly ash as low cost and environmentally friendly filler and its effect on the properties of mix asphalt

Woszuk, Agnieszka; Bandura, Lidia; Franus, Wojciech

doi:10.1016/j.jclepro.2019.06.353

Cited by 108 publications

(29 citation statements)

References 48 publications

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“…Its alkalinity and hydrophobicity also promote a strong bond with asphalt due to its acidic nature. Hence, mastics composed of red mud offer a satisfactory resistance against moisture permeation and had good active-passive adhesions [40].…”

Section: General Analysis Of the Resultsmentioning

confidence: 99%

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The Influence of Alternative Fillers on the Adhesive Properties of Mastics Fabricated with Red Mud

et al. 2020

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The adhesion between bitumen and aggregates strongly influences the lifetime of pavements. To improve adhesiveness, the road construction industry has been using additives to alter the interfacial energy and improve the affinity of materials in the presence of water. However, the water sensitivity varies according to the mixture design, since the interaction may occur differently depending on the materials chosen. As the use of alternative materials is increasing in road constructions, further analysis of its affinity with aggregates and bitumen is necessary. In that sense, this study evaluates the adhesion performance of mastics mixed with traditional fillers, such as limestone and dolomite, and residues, such as fly ash and red mud. To assess possible interactions with the red mud, the fillers are mixed in distinct percentages and tested for adhesiveness, wettability, penetration, and softening point. The results show the importance of hydrophilicity, asphalt viscosity, and physical–chemical properties to define adhesive interactions.

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Section: General Analysis Of the Resultsmentioning

confidence: 99%

“…The percentage of SiO 2 (>50%) did not worsen the water resistance. Woszuk et al [40] reported that a higher content of unburnt carbon in the fly ash provides higher hydrophobicity, reducing the water sensibility. Indeed, the fly ash obtained good hydrophobic results that indicate a strong bonding with bitumen.…”

Section: General Analysis Of the Resultsmentioning

confidence: 99%

The Influence of Alternative Fillers on the Adhesive Properties of Mastics Fabricated with Red Mud

et al. 2020

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“…The calcium filler-which is obtained by grinding limestone to the required grain size (0.063 mm in Europe and 0.075 mm in the US)-is used most commonly. Other materials that can be applied to asphalt mix as fillers include fly ash [10] coal waste powder [11], brick dust [12], sewage-sludge ash [13] glass powder [14] and others. Zeolites are also among the materials that are used as an additive to mix asphalt and partially replace the filler.…”

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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“…Moreover, the application of fly ash as the alternative mineral filler in asphalt mixtures was also studied, showing that the asphalt mixtures with fly ash present better rutting resistance and higher resilient modulus. [13,14].After the cement grout is poured into the asphalt mixture, the pavement performance of the SFPM is affected by the bond strength of the cement-asphalt interface. Poor contact at the interface results in insufficient strength and poor deformation.…”

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confidence: 99%

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confidence: 99%

High-Performance Semi-Flexible Pavement Coating Material with the Microscopic Interface Optimization

Jiang

Xue

et al. 2020

Coatings

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This paper aims to optimize the asphalt-mortar interface characteristics of semi-flexible pavement coating material (SFPCM), three types of the interface modifiers, namely the silane coupling agent, carboxylated styrene-butadiene latex, and cationic emulsified asphalt, are selected to add into the cement mortar to optimize the asphalt-mortar interface. The microscopic characteristics of the asphalt-mortar interface and the macroscopic pavement performance of the SFPCM after the interface optimization are investigated to reveal the effect of interface modifiers and determine the best formula. Results show that: (1) The dry shrinkage of the cement mortar is increased with the increased dosage of the interface modifiers, while the strength is decreased accordingly; (2) the optimum dosages of the silane coupling agent, carboxylated styrene butadiene latex, and cationic emulsified asphalt are 0.5%, 10%, and 5%, respectively; (3) the microscopic asphalt-mortar interface characteristics of the SFPCM with different interface modifiers have significant differences; (4) the SFPCM with the cationic emulsified asphalt presents the best pavement performance, particularly the high-temperature stability. These results can be attributed to improve the pavement properties of SFPCM.

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Fly ash as low cost and environmentally friendly filler and its effect on the properties of mix asphalt

Cited by 108 publications

References 48 publications

The Influence of Alternative Fillers on the Adhesive Properties of Mastics Fabricated with Red Mud

The Influence of Alternative Fillers on the Adhesive Properties of Mastics Fabricated with Red Mud

Application of Zeolite Tuffs as Mineral Filler in Warm Mix Asphalt

High-Performance Semi-Flexible Pavement Coating Material with the Microscopic Interface Optimization

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