Technology for unbound road base/top layers with high reclimed asphalt pavement content satabilization using fly ash and Portland cement

Viktors Haritonovs, Pēteris Šķēls

Description of the Technology

20 cm thick stabilized road surface layer construction hes to be performed by using cold recycling method in following stages - The following actions were performed: (I) preparation of existing top layer before construction of new stabilized layer; (II) delivery of new materials (RAP and dolomite aggregate); (III) distribution of materials according to layer composition in each full scale test section; (IV) distribution of min 1.5% of total mixture mass cement and max 20% of fly ash ; (V) cold recycling; (VI) surface profiling and roller compaction; (VII) top coating with bitumen.

      

      

Applications

For stabilization of unbound road base and top layer.

Advantages

Partial cement replacement allows achieve significant financial savings by maintaining and even improving the performance properties of the unbound road construction layers, as well as having positive impact on environment by reducing CO₂ emissions from cement production.

Keywords

stabilzation,recycling,road base layer,road top layer,fly ash