Adhesion in Bitumen-Aggregate-Systems

Grönniger, Jens; Wistuba, Michael P.; Renken, P

doi:10.1080/14680629.2010.9690311

Cited by 45 publications

(20 citation statements)

References 2 publications

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“…The interpretation of the results, however, can vary significantly as the degree of bitumen coverage is estimated by individual operators. More recently, computer-aided techniques were employed to minimise the subjectivity of the rolling bottle test method (Grönniger, Wistuba, & Renken, 2010). Even though imaging techniques were found to be promising for standardising the visual inspection method, further improvements in the protocols are required with respect to the quality of the image and the conditions under which imaging was made (camera position, lighting, etc.).…”

Section: Development Of a New Moisture-conditioning Protocolmentioning

confidence: 99%

Experimental evaluation of long- and short-term moisture damage characteristics of asphalt mixtures

Varveri

Avgerinopoulos

Scarpas

2015

Road Materials and Pavement Design

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Moisture damage susceptibility was evaluated using a conditioning protocol, which comprises two conditioning types, namely bath immersion and pore pressure application. The protocol was used to quantify the effect of long-and short-term moisture damage processes on asphalt mixtures. In addition, computed tomography scanning and image analysis techniques were employed to characterise damage due to pore pressure. Compacted porous asphalt samples, with various aggregate and bitumen types, were conditioned by combinations of water immersion and cyclic pore pressures by means of the moisture-induced sensitivity tester, and subsequently tested using the indirect tensile test. The results indicated that strength degradation due to moisture is influenced by the conditioning regime and time, as well as by aggregate and binder types. Overall, asphalt mixtures with polymer-modified bitumen and sandstone aggregates exhibited the best performance against moisture. Nevertheless, the long-and shortterm moisture damage mechanisms had a diverse effect on mixture degradation. Repeated pore pressures were found to have a significant effect on mixture tensile strength. Image analysis revealed the effect of pore pressures on air voids content and interconnectivity of asphalt mixtures, while visual observations suggested that repeated pore pressures induce damage by opening new flow paths and eroding fine sand and mastic particles.

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Section: Development Of a New Moisture-conditioning Protocolmentioning

confidence: 99%

Experimental evaluation of long- and short-term moisture damage characteristics of asphalt mixtures

Varveri

Avgerinopoulos

Scarpas

2015

Road Materials and Pavement Design

View full text Add to dashboard Cite

show abstract

“…• Laboratory interphase interaction testing: interaction between the two materials is tested in laboratory conditions, which cannot reflect many variable parameters like aggregate shape, surface, and so on (contact angle measurement, Wilhelmy method, etc.) [7][8][9][10][11].…”

Section: ]mentioning

confidence: 99%

“…Stripping rate observation-based methods provide the most indicating results in terms of applicability and reliability. They are therefore most frequented across technical praxis, as summarized by Grönninger et al [9]. However, an evaluation of these methods is based on subjective assessment of at least two evaluators, who estimate a degree of bitumen-coated area on aggregate visually.…”

Section: ]mentioning

confidence: 99%

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

Trejbal¹,

Prošek²,

Valentová³

2018

APP

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This work presents how to assess a rate of adhesion between bituminous binder and mineral aggregate. Asphalt mixtures composed from grade bitumen 50/70, reference or modified with adhesion promoters based on amines, and aggregate (Brant, Zbraslav, Skuteč – 8-16mm) were made and then photographed. Three adhesion assessment approaches were applied: (i) standardized adhesion visual assessment, (ii) gray level thresholding, and (iii) entropy-based image segmentation, both evaluated from digital images. It was shown that adhesion between both Brant and Skuteč and reference binder, expressed as a rate of binder-coated area onto aggregate particles, was equal to ca. 50-70 %, while mixture composed from Zbraslav exhibited ca. 70-80 %. If adhesion promoters were used, these areas increased in all three cases up to 80-90 %. It was shown that results obtained using visual and entropy segmentation analysis were very similar, while these differed in comparison with gray-level thresholding.

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“…Mineral aggregates, especially those containing quartz-based granites, are typical for its affinity for water, much more than for binder. Once the asphalt mixture is exposed to water, this can easily penetrate between the two materials and thus acts as a separation, if binder to aggregate adhesion is too poor [3,4]. Consequently, individual aggregate particles are stripped, i.e., the thin bituminous film is removed from their surface.…”

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 in Bitumen-Aggregate-Systems

Cited by 45 publications

References 2 publications

Experimental evaluation of long- and short-term moisture damage characteristics of asphalt mixtures

Experimental evaluation of long- and short-term moisture damage characteristics of asphalt mixtures

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

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

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