Improving the technical properties of recycled aggregates for road construction
Original version
Adomako, S. (2023). Improving the technical properties of recycled aggregates for road construction [Doctoral dissertation]. University of Agder.Abstract
Sustainable construction, operation and maintenance of road infrastructure are currently of high priority in Norway. The development of the highway standards and specifications (e.g., N200) plays an important role, so that optimized use of recycled excavation materials and crushed concrete is achieved in the sub-base and base layers. Generally, factors that hinder the use of EM include geological complexity (i.e., composition of mechanically weak rocks), the absence of declaration policies, and a standard framework to characterize the testing frequency of general properties. Considering their application in permitted quantities in the base layer, it is expected that compliance with the mechanical performance, that is, Los Angeles (LA) and micro-Deval (MD) and other geometric properties designed for conventional materials will be met. In addition, given the related geological complexity, it is essential to identify the effects of chemical and mineralogical features, as this may enhance the opportunity to classify geological variations and optimize the performance by mixing the masses with other materials. In this study, the first approach involved the identification of knowledge gaps pertaining to the relationship between the local geology and the mechanical performance (LA and MD) of the aggregates.
Has parts
Paper I: Adomako, S., Engelsen, C. J., Thorstensen, R. T. & Barbieri, D. M. (2021). Review of the Relationship between Aggregates Geology and Los Angeles and Micro-Deval Tests. Bulletin of Engineering Geology and the Environment, 80, 1963-1980. Published version. https://doi.org/10.1007/s10064-020-02097-y. Full text is available in AURA as a separate file: https://hdl.handle.net/11250/2835919.Paper II: Adomako, S., Engelsen, C. J., Danner, T., Thorstensen, R. T. & Barbieri, D. M. (2022). Recycled aggregates derived from excavation materials-Mechanical performance and identification of weak minerals. Bulletin of Engineering Geology and the Environment, 81, 1-12. Published version: https://doi.org/10.1007/s10064-022-02817-6. Full text is available in AURA as a separate file: https://hdl.handle.net/11250/3012527.
Paper III: Adomako, S., Engelsen, C. J., Thorstensen, R. T. & Barbieri, D. M. (2022). Repeated Load Triaxial Testing of Recycled Excavation Materials Blended with Recycled Phyllite Materials, Materials, 15(2), 1-15. Published version: https://doi.org/10.3390/ma15020621. Full text is available in AURA as a separate file: https://hdl.handle.net/11250/2986355.
Paper IV: Adomako, S., Engelsen, C. J., Døssland, L.T., Danner, T. & Thorstensen, R. T. (2023). Technical and environmental properties of recycled aggregates produced from concrete sludge and excavation materials, Case Studies in Construction Materials, 19, 1-11. Published version: https://doi.org/10.1016/j.cscm.2023.e02498. Full text is available in AURA as a separate file: https://hdl.handle.net/11250/3093071.