Knowledge tank

Sie interessieren sich für Trends und Innovationen am Markt? Hier finden Sie informative Übersichten und technische Beiträge. Bitte besuchen Sie bald wieder diese Seite, die wir regelmäßig aktualisieren.

Technische Beiträge

Forderungen nach CO2-armer Technologie werden lauter

Quer durch Europa werden Tätigkeiten mehr und mehr eingeschränkt, die im Verdacht stehen zum Klimawandel beizutragen. Zielvorgaben der Europäischen Union sollen den Energieverbrauch und den Emissionsausstoß senken und die verstärkte Nutzung erneuerbarer Energien fördern. Industriesektoren einzelner europäischer Staaten werden durch gesetzliche Regelungen oder andere Fördermaßnahmen dazu angehalten, ihre CO2-Bilanz zu minimieren – der Straßenbau bildet da keine Ausnahme.

Mehr erfahren Forderungen nach CO2-armer Technologie werden lauter

Die Umwelt profitiert von Niedrigtemperatur-Asphalt

Drei neue besonders umweltfreundliche Straßenbaustoffe werden in Europa immer populärer. Ein Kaltasphalt namens Tayset setzt sich in Schottland durch, der warme Belag „Green Asphalt“ findet in Schweden breite Verwendung und ein halbwarmer Baustoff – LT-Asfalt – profitiert von neuen Umweltgesetzen in den Niederlanden.

Mehr erfahren Die Umwelt profitiert von Niedrigtemperatur-Asphalt

Erhaltung von Belägen mit Oberflächenbehandlungen

Die Erhaltung von Belägen durch den rechtzeitigen Einsatz von Oberflächenbehandlungen ist eine besonders attraktive Möglichkeit für Straßenbauträger, ihr Straßennetz auf kostengünstigste Art und Weise instand zu halten. Europa steht vor einer Periode, die von zurückgehenden Steuereinnahmen und einer strikteren CO2-Gesetzgebung zur Bekämpfung des Klimawandels gekennzeichnet ist. Der Beitrag zeigt, wie Oberflächenbehandlungen zur Erhaltung von Belägen selbst unter widrigsten klimatischen Bedingungen beitragen können. Und dies zu relativ geringen Kosten und mit minimaler Umweltbelastung.

Mehr erfahren Erhaltung von Belägen mit Oberflächenbehandlungen

Reflexionsrisse in Belägen mit komplexen Produkten verhindern

Mehrkomponentenlösungen im Asphaltbau können das Auftreten von Reflexionsrissen vermeiden, wie sie manchmal bei Straßenbefestigungen in Mischbauweise, d.h. Belägen mit Betontragschichten und Asphaltüberbauungen, auftreten. Dieser Beitrag untersucht, wie diesen Rissbildungen begegnet wird und damit die Gebrauchseigenschaften von Asphaltbelägen verbessert werden.

Mehr erfahren Reflexionsrisse in Belägen mit komplexen Produkten verhindern

EME-Asphalt + PmB = Bruchfestigkeit

Hochpolymermodifizierte Asphaltbeläge optimieren die Erhaltung der Schnellstraßen in England

Mehr erfahren EME-Asphalt + PmB = Bruchfestigkeit

Scientific papers

Evaluation of Test Sections with Polymer Modified Bitumens

It was found that PMBs, particularly SBS modified, demonstrate better rheological properties as compared to unmodified bitumens, even after several years in the field.

Mehr erfahren Evaluation of Test Sections with Polymer Modified Bitumens

Durability of polymer modified binders in asphalt pavements

Increases in traffic density and axle loading in combination with a pressure to reduce material costs has created high performance requirements for asphalt pavements.

Mehr erfahren Durability of polymer modified binders in asphalt pavements

Reducing the temperature

Some of the greatest sustainable developments in the mastic asphalt industry have occurred in Germany, and a new paper presented by the Nynas Competence Centre Antwerp has assessed these developments over the past 15 years.

Mehr erfahren Reducing the temperature

Contributing to sustainability

A paper presented by the Nynas Competence Centre Antwerp examines how bitumen producers such as Nynas can contribute, through specific products and solutions, to the three pillars of sustainability: economic, ecological and social interests.

Mehr erfahren Contributing to sustainability

New test for rutting evaluated

A new Multiple Stress Creep Recovery Test (MSCRT) has been introduced as a fast and user-friendly bitumen specification test for rutting. A Nynas study analysed whether this MSCRT relates to rutting and how the test can identify the presence of a polymer network in a bituminous binder.

Mehr erfahren New test for rutting evaluated

Bringing new life to fatigue tests

Asphalt mixture fatigue tests are widely used but are time consuming and expensive. Alternatively, binder fatigue tests might be an effective preliminary evaluation of material for mixture fatigue life testing. An interlaboratory test was performed to investigate the repeatability as well as the reproducibility of binder fatigue tests.

Mehr erfahren Bringing new life to fatigue tests

Reading between the layers

Assessment of interlayer bonding is of primary importance but research is needed to better harmonise test methods. In this study, 14 laboratories from 11 countries participated in an interlaboratory test to compare the different test procedures for assessing the interlayer bonding properties of asphalt pavement.

Mehr erfahren Reading between the layers

Differential Scanning Calorimetry applied to bitumen: Results of the RILEM NBM TG1 Round Robin test.

The application of Differential Scanning Calorimetry (DSC) has been proven useful in characterizing bituminous binders, distillates and crude oils. In this paper, results of the round robin test, organized by the Rilem TC 231 Nanotechnology-based Bituminous Materials (NBM) TG1 group are reported.

Mehr erfahren Differential Scanning Calorimetry applied to bitumen: Results of the RILEM NBM TG1 Round Robin test.

The Multiple Stress Creep Recovery Test: A Detailed Analysis of Repeatability and Reproducibility

The Multiple Stress Creep Recovery Test (MSCR) was recently introduced to evaluate bituminous binders at high service temperatures, in particular to evaluate the stress or loading resistance

Mehr erfahren The Multiple Stress Creep Recovery Test: A Detailed Analysis of Repeatability and Reproducibility

Aging of Bituminous Films

As binder aging plays a significant role in the durability and performance of asphalt pavements, it is important to understand and quantify the effects of aging.

Mehr erfahren Aging of Bituminous Films

Aging Characteristics of Polymer Modified Binders in Porous Asphalt Pavements

This paper deals with the aging characteristics of SBS polymer modified binders in porous asphalt pavements. Field cores were taken from test roads of different ages and structurally analyzed using X-ray tomography. Binders were extracted from the upper and under layers of the field-aged cores and characterized using gel permeation chromatography, Fourier transform infrared spectroscopy, dynamic shear rheometer, as well as conventional penetration test. The chemical and mechanical characterization was also carried out on the binders recovered from loose mixes, and on the binders aged in laboratory by RTFOT and PAV.

Mehr erfahren Aging Characteristics of Polymer Modified Binders in Porous Asphalt Pavements

SBS Modified Bitumens: Does Their Morphology and Storage Stability Influence Asphalt Mix Performance?

This paper studies the influence of morphology and storage stability of polymer modified binders on the mechanical performance of asphalt mixes, in particular permanent deformation and fatigue characteristics. Four 70/100 pen bitumens of different crude origins and a linear SBS were selected to prepare polymer modified binders (PmBs). The binders showed differences in morphology, storage stability and in phase separation diagram; their rheological properties were found to be strongly morphology-related.

Mehr erfahren SBS Modified Bitumens: Does Their Morphology and Storage Stability Influence Asphalt Mix Performance?

Rheological Characterization of Polymer Modified Bitumens

Various polymer modified bitumens (PmBs) were prepared and characterized using a dynamic shear rheometer and a bending beam rheometer. PmBs differ considerably in viscoelastic properties depending on base bitumen, and polymer type and content. The rheology of PmBs is strongly related to the morphology, and is also affected by sample preparation.

Mehr erfahren Rheological Characterization of Polymer Modified Bitumens

Compositional and Structural Characterization of Waxes Isolated from Bitumens

Waxes isolated from different bitumens were investigated with respect to their chemical compositions and structural characteristics. Isolation of waxes was performed using a distillation method (European standard EN 12606-1) and a method based on size exclusion chromatography.

Mehr erfahren Compositional and Structural Characterization of Waxes Isolated from Bitumens

Effect of Bitumen Wax on Asphalt Mixture Performance

This paper mainly deals with waxes which are naturally present in bitumens, and does not include synthetic waxes that sometimes are proposed as bitumen additives. The main objectives were to study the rheological effect of bitumen waxes and the impact of waxy bitumens on asphalt mixture performance, such as rutting, low temperature cracking, and water sensitivity.

Mehr erfahren Effect of Bitumen Wax on Asphalt Mixture Performance

A New Test Method for Determination of Wax Content in Crude Oils, Residues and Bitumens

A new method for determining wax content in petroleum materials is developed. It is based on thin layer chromatography with flame ionization detection (TLC-FID) and involves two-step development with two solvents.

Mehr erfahren A New Test Method for Determination of Wax Content in Crude Oils, Residues and Bitumens

Evaluation of binder recovery methods and the influence on the properties of polymer modified bitumen

In hot mix asphalt, binder extraction in combination with a recovery method is commonly used to evaluate the properties of a binder embedded in an existing pavement structure. In some countries, like Germany, specifications on the softening point and elastic recovery are legally required on polymer modified binders (PmBs), after recovery from a pavement.

Mehr erfahren Evaluation of binder recovery methods and the influence on the properties of polymer modified bitumen

Ageing of bituminous binders - laboratory tests and field data

A comprehensive literature study on road durability has indicated that the aging susceptibility of bituminous binders in surface layer is a key parameter determining the life time of an asphalt pavement.

Mehr erfahren Ageing of bituminous binders - laboratory tests and field data

A simple test method for determination of waxes in crude oils and bitumens

Bitumen containing natural waxes and their effect on asphalt performance has been debated for many years. The objective of this paper is to develop a simple method for determining waxes in bitumens and in crude oils.

Mehr erfahren A simple test method for determination of waxes in crude oils and bitumens

A laboratory study on the use of waxes to reduce paving temperatures

There is considerable interest in the possibilities of producing and paving asphalt at reduced temperature. A reduction of the temperature generates a significant reduction in energy consumption, emissions and fumes. Also health and safety conditions for the road workers are improved.

Mehr erfahren A laboratory study on the use of waxes to reduce paving temperatures

Effect of Ageing on Bitumen Chemistry and Rheology

Effect of ageing on bitumen chemistry and rheology was studied. Seven bitumens were aged according to the thin film oven test (TFOT) and the rolling thin film oven test (RTFOT). The binders were characterised using infrared spectroscopy, chromatography and dynamic mechanical analysis.

Mehr erfahren Effect of Ageing on Bitumen Chemistry and Rheology