EXPERIMENTAL AND PRACTICAL EXPERIENCE WITH ALTERNATIVE HYDRAULIC BINDERS MAINLY IN ASPHALT PAVEMENT COLD RECYCLING

Author(s): Jan Valentin, Zuzana Čížková, Jan Suda
Paper category: Proceedings
Book title: IV International Conference Progress of Recycling in the Built Environment
Editor(s): Isabel M. Martins, Carina Ulsen, Yury Villagran
ISBN:
e-ISBN: Isabel M. Martins, Carina Ulsen, Yury Villagran
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 266-273
Total Pages: 08
Language : English

Abstract: Recycling of asphalt pavements is a technical approach which is used and continuously
developed in road construction and rehabilitation for more than 40 years. Cold recycling,
especially if done in-situ, is an effective solution for rehabilitating mainly rural roads of medium
to low traffic intensities. It can be used either for turning unbound layers to bound structural
layers with improved performance or to overall improve bearing capacity and durability of the
pavement structure. During cold recycling usually old asphalt layers together with cement
bound base layers or granular base materials are milled and mixed with bituminous binders or
cement (or often even both) to form a new structural layer.
In the research done by the Czech Technical University in Prague continuously for more than
7 years the attention has been paid to evaluate and develop alternative hydraulic binders where
waste materials or by-products can be used and usually the traditional cement can be replaced.
These alternative hydraulic or alkali activated binders are based on fly ash, blast furnace slag
or selected particle ranges of recyclable concrete (<2mm). Findings from experimental studies
including traditional empirical as well as more advanced performance-based tests are
summarized in this paper. Further, experience from a trial section where activated fly-ash from
fluidized bed was used as substitute in cold recycled mixture will be shortly discussed as well.

Online publication : 2018
Publication type : full_text
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