Influence of High-Temperature Volatilization on Performance of Bituminous Binder

Cui, Pei Qiang; Zhang, Hong Hua; Wu, Shao Peng

doi:10.4028/www.scientific.net/kem.599.164

Cited by 6 publications

(4 citation statements)

References 4 publications

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“…It is greatly influenced by the quality of the bituminous mix which in turn is directly related to proper selection of materials including aggregates and bitumen. However, there are other factors that impact of the properties of bituminous mixes as well such as the temperature and duration at which the asphalt mixes are mixed, placed and compacted [4]. These factors are related to bitumen ageing which is normally determined by how much its physical and chemical characteristics change.…”

Section: Generalmentioning

confidence: 99%

“…Bitumen quality is critical in producing a good mix since it coats and binds the aggregates together to produce a homogenous mix. Its properties are highly dependent on temperature because bitumen softens at high temperature resulting in permanent deformation while it stiffens and becomes brittle under low temperature resulting in cracking [4,5]. Bitumen therefore play a pivotal role in the deterioration of asphalt mixes and is directly responsible for most pavements defects such as rutting and fatigue cracking.…”

Section: Generalmentioning

confidence: 99%

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Effect of Inappropriate Binder Grade Selection on Initiation of Asphalt Pavement Cracking

Bangi

Kakoto²

2020

Sustainability

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This paper is aimed at assessing in-service asphalt pavement cracking in order to fully understand its causes as well as reviewing the possible impact of implementing a new mix design method on failures observed. Field and laboratory investigations were conducted as well as a review of design and construction records. Substitution of a Performance Grade (PG) binder with straight run pen grade binder without performing independent Superpave PG verification tests greatly contributed to cracking. A 20/30 pen grade binder which was utilised had already undergone some change in its properties since its manufacture and therefore did not provide the required workability and crack resistance that it would otherwise have been expected to provide. Target mixing and compaction temperature ranges during construction were higher than those recommended confirming that the binder used had already undergone a change in its physical and chemical characteristics between the time of its manufacture and use. Additionally, a lapse in quality control and assurance during asphalt production and laying resulted in a highly voided wearing course which exacerbated the situation.

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Section: Generalmentioning

confidence: 99%

Section: Generalmentioning

confidence: 99%

Effect of Inappropriate Binder Grade Selection on Initiation of Asphalt Pavement Cracking

Bangi

Kakoto²

2020

Sustainability

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“…Os resultados indicaram que o aumento do envelhecimento resultou no acréscimo da rigidez e da estabilidade Marshall, juntamente com a redução dos valores de deformação. Registra-se ainda, os trabalhos de LOLLY (2013) [23] e CUI et al (2014) [24]. O primeiro autor examinou o impacto da exposição do ligante asfáltico a altas temperaturas ao longo do tempo.…”

Section: Módulo Complexo |E*| De Misturas Asfálticas E O Efeito Do Enunclassified

Estudo viscoelástico de misturas asfálticas frescas e envelhecidas com agregado sinterizado de argila calcinada

et al. 2020

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RESUMO Os revestimentos asfálticos dos pavimentos flexíveis, em função do ligante betuminoso presente em sua composição, possuem comportamento mecânico dependente de vários fatores, dentre eles: processo de compactação, temperatura e taxa de aplicação de carregamento. Várias são as reações passíveis de ocorrerem nos principais constituintes dessas formulações asfálticas, dentre estas, pode-se citar a oxidação, endurecimento físico e perda de voláteis. No caso do ligante asfáltico, o envelhecimento aumenta a viscosidade, associada a uma diminuição da penetração e alguma perda de suas características aglutinantes. Em particular, o aumento de consistência confere maior dureza com o tempo. No trabalho em pauta, estudou-se o comportamento mecânico de misturas asfálticas confeccionadas com Agregado Sinterizado de Argila Calcinada (ASAC), por meio de ensaios dinâmicos de flexão a quatro pontos. Determinou-se experimentalmente o efeito do processo de compactação dos corpos de prova prismáticos, bem como a influência do envelhecimento do ligante asfáltico no módulo dinâmico |E*| da mistura. Constatou-se queda de até 81,1% no valor do módulo complexo, frente às solicitações de temperatura e frequência selecionadas. Os resultados experimentais foram analisados à luz do modelo de Euler-Bernoulli generalizado para materiais viscoelásticos com carregamento dinâmico representativo do ensaio de flexão a quatro pontos. Salienta-se a compatibilidade do modelo teórico para as duas composições estudadas (fresca e envelhecida), face ao ajuste alcançado, representado pelos coeficientes de determinação (R²) resultantes.

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“…Significant changes in dynamic modules develop during the first few hours of exposure to elevated temperatures, leading to a rise in the short-term ageing of the binder. In their survey, analyse properties of two bitumens during their volatilisation at high temperatures [25]. The results indicate that the mass content of bituminous binder decreases as a result of its exposure to high temperatures.…”

Section: Volatilisationmentioning

confidence: 99%

Starenje vrućih asfaltnih mješavina

2016

JCE

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An overview of current surveys related to the ageing of placed hot mix asphalt and asphalt pavement courses is presented in the paper. Asphalt ageing occurs as a result of external and internal factors. Internal factors include bitumen content in the mixture, thickness of bitumen layer enveloping aggregate grains, air void content, and properties of aggregates and binders. All factors affecting the ageing process of binders and asphalt mixtures are described in detail, including also some of the existing models that are presently used to predict ageing of produced and placed asphalt. Starenje vrućih asfaltnih mješavina U radu je dan pregled dosadašnjih istraživanja vezano za starenje proizvedenih vrućih asfaltnih mješavina i izvedenog asfaltnog sloja. Starenje asfalta događa se uslijed djelovanja vanjskih i unutarnjih čimbenika. Unutarnji čimbenici podrazumijevaju udio bitumena u mješavini, debljinu sloja bitumena oko zrna agregata, volumni udio šupljina te svojstva agregata i veziva. Detaljno su opisani svi utjecajni čimbenici na proces starenja veziva i asfaltnih mješavina te dio prisutnih modela koji se u današnje vrijeme koriste za predviđanje starenja proizvedenog i ugrađenog asfalta.Ključne riječi: starenje veziva, starenje asfaltne mješavine, isparavanje, oksidacija, modeli za predviđanje starenja Übersichtsarbeit Ivica Androjić

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Influence of High-Temperature Volatilization on Performance of Bituminous Binder

Cited by 6 publications

References 4 publications

Effect of Inappropriate Binder Grade Selection on Initiation of Asphalt Pavement Cracking

Effect of Inappropriate Binder Grade Selection on Initiation of Asphalt Pavement Cracking

Estudo viscoelástico de misturas asfálticas frescas e envelhecidas com agregado sinterizado de argila calcinada

Starenje vrućih asfaltnih mješavina

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