Adhesion Promoters in Bituminous Road Materials: A Review

Rossi, Cesare Oliviero; Teltayev, Bagdat; Angelico, Ruggero

doi:10.3390/app7050524

Cited by 55 publications

(23 citation statements)

References 45 publications

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“…Bitumen comprises complex micelles of asphaltenes with a weak chemical affinity for aggregate, whereas the aggregate is characterized by a strong affinity for water [37]. Indeed, the granite aggregate used in this research naturally has a lower affinity for bitumen and requires anti-stripping additives to improve its bonding properties.…”

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

et al. 2020

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“…Active adhesion promoters are known to have surface active agents that react with silica surfaces even in the presence of water. These additives are popularly used with warm mix asphalt (WMA) to promote aggregate-bitumen adhesion in the presence of moisture [51]. As can be observed from Figure 9, while TSR values for VA mix progressively dropped, those of RA gradually rose to peak at the OBEC.…”

Section: Moisture Susceptibilitymentioning

confidence: 98%

Laboratory Mix Design of Cold Bitumen Emulsion Mixtures Incorporating Reclaimed Asphalt and Virgin Aggregates

Chelelgo¹,

Gariy

Shitote

2018

Buildings

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Bitumen emulsion asphalts, especially those incorporating marginal and secondary aggregates, are energy efficient, environment friendly, and sustainable alternatives to hot-mix asphalts. This study set out to compare engineering properties of a bitumen emulsion asphalt composed entirely of virgin aggregates with another composed of 55% reclaimed asphalt and 45% virgin aggregates. The aggregates were bound with a slow setting cationic bitumen emulsion composed of 65% base bitumen and 35% water. Marshall specimens molded at varying pre-mix water and bitumen emulsion contents were cured in molds for 24 h before being de-molded and cured for a further 72 h at 40 • C. Dry densities, porosities, and indirect tensile strengths for the cured specimens were determined in dry and soaked states. Virgin aggregate mix, at an optimum binder content of 6.1%, had a tensile strength ratio of 1.3 with corresponding air voids and moisture absorption values of 10.1% and 0.92%, respectively. Similarly, reclaimed asphalt mix at an optimum binder content of 6.2% had a tensile strength ratio of 1.03, with corresponding air voids and moisture absorption values of 7.9% and 0.38%, respectively. Compared to virgin mix, reclaimed asphalt mix had lower air voids and lower moisture absorption values with the overall benefit of enhanced resistance to moisture damage. ultimate engineering properties upon completion of batching, strength gain in cold asphalts proceed at rates dependent on breaking of the emulsion and evaporation of the resultant water. They behave like improved granular materials in the early stages of their lives but eventually attain properties similar to those of hot-mix asphalts once all the moisture is lost through curing [2][3][4].Compared to hot-mix asphalts, cold asphalts are energy efficient, cheaper, and environmentally friendly, but have the downsides of requiring longer curing times, having high air-void contents, and low early-life strengths [5]. Further, environmental and monetary savings accrue when marginal and secondary aggregates, like recycled asphalts, are used in cold-asphalt mixtures. In their study, Kandhal and Mallick [6] estimated cost savings of between 14% and 34% when recycled asphalt aggregates varying between 20% and 50% by mass of total mix were used in conjunction with virgin aggregates. In another study by Thanaya [7], energy savings of up to 40% were realized when bitumen emulsions were used in place of penetration grade bitumen in asphalt production. A study by Oke et al. [8] estimated savings of between 40% and 60% when cold reclaimed asphalt pavement mixtures were used in place of hot-mix asphalt.Currently, there is no universally accepted laboratory asphalt mix design procedure for cold asphalt mixtures, rather a myriad of procedures have been developed by countries and agencies to suit their local conditions and needs [9][10][11][12][13]. In the United States, Asphalt Institute, Chevron Inc., U.S. Navy, and the states of Oregon, Pennsylvania, Indiana, California, Texas, and New Mexico [14...

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“…To reduce or avoid stripping, bituminous binder can be modified with adhesion promoters. The function of these synthetic compounds or those from natural resources is based on disruption of intermolecular interactions between water and aggregate surface [6].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Adhesion Between Bituminous Binder and Mineral Aggregate Using Digital Image Analysis

Trejbal¹,

Valentová²,

Horová³

2019

APP

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Asphalt mixtures often fail due to a low adhesion of bituminous binder to mineral aggregate, which leads to surface coarse damages like potholes and fatigue cracking. To avoid this phenomenon, different types of adhesion promoters may be admixed into bituminous binder but a new question about their effectiveness arises. This paper presents two semi-automatic methods, which reliably replace the subjective assessment. Both of them use a digital image of asphalt mixtures as an input. The first is based on a gray level thresholding, while the second one on an entropy-based image segmentation. Asphalt mixtures composed from Zbraslav aggregate (fraction 8–16 mm), paving grade bitumen 50/70 and several types of adhesion promoters were made and subjected to the adhesion assessment. It was shown that aggregate grains coated by binder was equal to ca. 83–88% in the case of reference binder, while that was increased by ca. 10–13% if whatever adhesion promoters were used.

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Adhesion Promoters in Bituminous Road Materials: A Review

Cited by 55 publications

References 45 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

Laboratory Mix Design of Cold Bitumen Emulsion Mixtures Incorporating Reclaimed Asphalt and Virgin Aggregates

Assessment of Adhesion Between Bituminous Binder and Mineral Aggregate Using Digital Image Analysis

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