Wood Fly Ash Stabilized Road Base Layers with High Recycled Asphalt Pavement Content
2021
Pēteris Šķēls, Viktors Haritonovs, Edvards PAvlovskis

Wood fly ash stabilised road base layers with high recycled asphalt pavements content was studied both at the laboratory and in-situ. The original recipe was chosen based on an actual stabilised pavement base layer design with cement CEM II/B-T 42.5R but optimised using wood fly ash. The existing road base layer from gravel was mixed with dolomite aggregate and recycled asphalt pavement, adding cement and wood fly ash at different proportions. The mixture was compacted at optimal water content according to the Standard Proctor test and further conditioned. Resistance to freezing and thawing of hydraulically bound mixtures was checked after 28 days of conditioning. Even 50 cycles of freezing and thawing were used. Test results indicated wood fly ash as an effective alternative to the typically used cement for road base stabilisation, including recycled asphalt pavement material. Three hydraulically bound mixtures were chosen for test sections in the pilot project. The project includes five different sections with three different hydraulic binder recipes. The performance of each section was evaluated


Keywords
fly ash, hydraulically bound mixtures, stabilisation, recycled asphalt
DOI
10.7250/bjrbe.2021-16.520
Hyperlink
https://bjrbe-journals.rtu.lv/article/view/bjrbe.2021-16.520

Šķēls, P., Haritonovs, V., Pavlovskis, E. Wood Fly Ash Stabilized Road Base Layers with High Recycled Asphalt Pavement Content. The Baltic Journal of Road and Bridge Engineering, 2021, Vol. 16, No. 2, pp. 1-15. ISSN 1822-427X. e-ISSN 1822-4288. Available from: doi:10.7250/bjrbe.2021-16.520

Publication language
English (en)
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