Chemically modified bitumens with improved adhesion to aggregate
Journal Title: Roads and Bridges - Drogi i Mosty - Year 2015, Vol 14, Issue 4
Abstract
Durability of asphalt pavements is dependent on the use of high-quality road binders. Good bitumen should exhibit adequate viscoelastic properties, resistance to ageing and good adhesion to mineral aggregates. In order to improve bitumen properties the modification of binder is used. For over 15 years, mainly in the USA, polyphosphoric (PPA) modifier is used, which improves viscoelastic properties of the binder and its adhesion to aggregate. The paper presents the extensive research results of adhesion of binders modified with polyphosphoric additive and SBS polymer, as well as the research results of water resistance of asphalt mixtures comprising these binders. In order to evaluate the adhesion test results a new computer image analysis, developed by the author at Warsaw University of Technology, was used. Computer analysis may constitute an alternative to inaccurate visual method. It is shown that there is a possibility to significantly improve binder adhesion to the aggregate as a result of bitumen modification with both SBS polymer and polyphosphoric (PPA) additive.
Authors and Affiliations
Michał Sarnowski
Keywords
Related Articles
- EP ID EP76655
- DOI 10.7409/rabdim.015.020
- Views 133
- Downloads 0
Carbonation of concretes containing calcareous fly ashes
The purpose of this research was to determine the carbonation depths in concrete containing calcareous fly ash. Eleven concrete mixes with the same water-binder ratio [i]w[/i]/[i]b[/i] and with different amounts of calca...
Wiadukt żelbetowy z początków XX wieku – analiza mikrostruktury stuletniego betonu
W artykule opisano historię wiaduktu Kolei Kaliskiej, a także stan zachowania konstrukcji. Omówiono aktualny stan jakości betonu z wiaduktu sklepionego parabolicznego Drogi Żelaznej Warszawsko-Kaliskiej – najprawdopodobn...
Steel plate curvatures of soil-steel structures during construction and exploitation
The paper analyses the deformation of cir- cumferential bands of shells made of corrugated metal sheets in soil-steel structures. A change of curvature in the crown of a shell is assumed as a measure of deformation. In t...
Ellipse offset curves in the formation of turbo-roundabouts
Various curves are used for shaping the geometry of roads and a curve applied the most often is the circular arc. Clothoid, spiral, ellipse, sets of curves shaped with polynomial functions and other similar curves are al...
Investigation of the new weight in motion system
Validation of a new methodology of loads identification generated by the traveling vehicles on the road surface is presented. The proposed approach is based on the concept of monitoring of strain development in a deforma...