New Hungarian Mechanistic-Empirical Design Procedure for Asphalt Pavements

Tóth, Csaba; Primusz, Péter

doi:10.7250/bjrbe.2020-15.466

Cited by 8 publications

(7 citation statements)

References 12 publications

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“…It also provides pathways for new and innovative technologies by incorporating the mechanistic properties of newly developed potential materials and technologies. The research work, methodology and outcomes are described in details by Primusz and Toth [20], where the material parameters described in Table 7 were applied for the calculations.…”

Section: Summary Of the Calculations And Practical Application Of The Methodologymentioning

confidence: 99%

Calculating the equivalent temperature for mechanistic pavement design according to the French method for Hungarian climatic conditions

Tóth

Pethő²

2021

Acta Tech. Jaurinensis

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The French pavement design method provides a very comprehensive, probability-based design approach. It also provides a fairly sophisticated method for establishing the equivalent pavement temperature, which has been used worldwide for different applications. The objective was to analyse the applicability of the French method for calculating the equivalent pavement temperature for Hungarian climatic conditions. It considers the thickness of the pavement structure and facilitate pavement temperature distribution. It was found that the French method provides a comprehensive approach and can facilitate variable climatic conditions and pavement temperature distribution while considering the thickness of the pavement structure. This provides fit for purpose solutions and eliminates the overly simplified approach to use a single equivalent pavement temperature for variable climatic and pavement conditions. Real pavement temperature data provided crucial input into the accuracy of the methodology. Asphalt modulus values and asphalt fatigue properties at different temperatures were estimated using an internationally well accepted method. The next focus item of this research work will be to refine the calculations based on asphalt modulus master-curves and fatigue data collected from laboratory testing at different temperatures.

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Section: Summary Of the Calculations And Practical Application Of The Methodologymentioning

confidence: 99%

Calculating the equivalent temperature for mechanistic pavement design according to the French method for Hungarian climatic conditions

Tóth

Pethő²

2021

Acta Tech. Jaurinensis

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“…To perform the calculations, a pavement structure model is needed, where the mechanical performance of each layer is given by its characteristic elasticity modulus (E), Poisson's ratio (), and layer thickness (h). In addition, the degree of inter-layer interaction should be recorded (Tóth et al 2020).…”

Section: Fatigue Resistance Testmentioning

confidence: 99%

“…Bitumen modifikovan gumom [45][46][47][48][49][50][51][52][53][54][55] se u Mađarskoj koristi kao bitumensko vezivo za proizvodnju asfaltne mešavine od 2013. To je nova vrsta gumenog bitumena proizvedena po patentiranoj tehnologiji.…”

Section: Performanse Asfaltnih Mešavina Sa Novim Tipom Bitumena Modifikovanog Gumomunclassified

Performance of asphalt mixtures with a new type of rubber modified bitumen

Almássy

Geiger

Holló

et al. 2021

FACTA U SERIES ARCHI

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The rubber modified bitumen 45/80-55 (RMB 45/80-55) product has been used in Hungary as bituminous binder for asphalt mix production since 2013. It is a new kind of rubber bitumen manufactured using patented technology. Over the past 8 years, it has been used to construct or renovate more than 100 asphalt road sections. Originally RMB 45/80-55 was used to replace paving grade bitumen 50/70 in some road construction projects. However, asphalt laboratory results and road construction experience showed that its quality can also achieve or in terms of some parameters exceed that of asphalt mixtures manufactured with polymer modified bitumen 25/55-65 (PMB 25/55-65). Primarily, its excellent resistance to low temperatures and fatigue are outstanding, in this respect; it surpasses the results of asphalts made with polymer modified bitumen. Its favourable fatigue resistance compensates for its lower stiffness; therefore, favourable results were obtained in the case of track structure design too in comparison with PMB. Considering the road construction benefits of this new type of rubber bitumen, as well as the support of the environmentally friendly recovery of waste tyres and fitting into a circular economy, a wider spread of the RMB product is realistically expected in the future.

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“…Chemical WMA additive is a combination of cationic surfactants and organic additive-based rheology modifier. The additive chemically modifies the bitumen and obtains active adhesion force that improves coating of aggregates with bitumen [18][19][20][21][22][23].…”

Section: Two Bitumen Modifier Types Elastomeric Type -Styrenementioning

confidence: 99%

Investigation of Mixing and Compaction Temperatures of Modified Hot Asphalt and Warm Mix Asphalt

Almusawi

Şengöz

Topal

2020

Period. Polytech. Civil Eng.

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The determination of mixing and compaction temperatures through the Equiviscous method has been defined as the standard method and it is designed for the base bitumen (unmodified bitumen) based on the viscosity measurements. The implementation of the Equiviscous method for the modified bitumen resulted in high mixing and compaction temperatures which may not be required during the construction of the asphalt mixtures. This study aims to investigate several alternative methods proposed in the literature named as high shear rate method, zero shear viscosity method, steady shear flow method, and phase angle method. Besides, the obtained mixing and compaction temperatures results are compared with the standard (equiviscous) method. For this purpose, 50/70 penetration grade bitumen modified with 5 % elastomeric type – Styrene Butadiene Styrene (SBS), and 1.5 % Reactive Elastomeric Terpolymer type – Elvaloy (RET) has been used. The study also aims to measure the applicability of the proposed alternative methods for the warm mix asphalt involving organic and chemical additives. The results have shown that for the polymer modified bitumen, the application of all proposed methods in the literature resulted in lower mixing and compaction temperatures compared to the Equiviscous method. While for the warm mix asphalt, the implementation of the steady shear flow method resulted in lesser temperatures compared to the Equiviscous method.

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New Hungarian Mechanistic-Empirical Design Procedure for Asphalt Pavements

Cited by 8 publications

References 12 publications

Calculating the equivalent temperature for mechanistic pavement design according to the French method for Hungarian climatic conditions

Calculating the equivalent temperature for mechanistic pavement design according to the French method for Hungarian climatic conditions

Performance of asphalt mixtures with a new type of rubber modified bitumen

Investigation of Mixing and Compaction Temperatures of Modified Hot Asphalt and Warm Mix Asphalt

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