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Potential of Natural and Recycled Concrete Aggregate Mixtures for Use in Pavement Structures

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2020
minerals-10-00744.pdf (2.414Mb)
Authors
Đokić, Olivera
Radević, Aleksandar
Zakić, Dimitrije
Đokić, Božidar
Article (Published version)
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Abstract
This study investigates the feasibility of using recycled concrete aggregate (RCA) as a partial substitution of natural aggregate in pavement engineering. Despite RCA’s good properties, such as polishing value and freeze-thaw resistance, its use is limited by low resistance to fragmentation and high-water absorption. This paper parent the experimental results of mineralogical-petrographic and physical-mechanical properties of RCA, natural stone (dolerite) and their combination (RCA content—15%, 30%, 45%, and 60%). The tested granular mixtures showed good resistance to fragmentation and wear (LA 22–27%, MDE 14–15%), as well as satisfactory Polished Stone Value of 55–57, which means they can be used in different layers of pavement structures. According to the obtained testing results, the application of RCA is possible in different flexible and rigid pavement layers and for various traffic loads.
Keywords:
RCA / dolerite / pavement / Polished Stone Value / fragmentation / micro-Deval / petrography / mineralogy / technical requirements
Source:
Minerals, 2020, 10, 744
Publisher:
  • MDPI
Projects:
  • Utilization of by-products and recycled waste materials in concrete composites in the scope of sustainable construction development in Serbia: investigation and environmental assessment of possible applications (RS-36017)
Note:
  • Special Issue: "Minerals and Other Phases in Constructional Geomaterials"

DOI: https://doi.org/10.3390/min10090744

ISSN: 2075-163X

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URI
http://grafar.grf.bg.ac.rs/handle/123456789/2055
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  • Катедра за материјале и конструкције
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