Abstract
A new approach to the proportioning of concrete mixtures with recycled aggregate is presented. This procedure requires less cement, which makes it more economical and environmentally attractive. Recent publications, opinions and discrepancies in relation to the durability of recycled concrete, such as freeze-thaw standards, studies of chloride penetration and diffusion, and sulfate attacks, are examined. The removal of gypsum constituents from recycled aggregates during their processing seems indispensable. This can be achieved with jigging machines, in which asymmetrical jig stroke diagrams can be implemented. Another effective technique for reducing gypsum content is selection by means of near infrared spectroscopy. It is discussed if appropriate test methods exist to evaluate the specific characteristics of recycled concrete aggregates with respect to frost durability. The miscellany of recently published papers, with results based in laboratory studies with accelerated tests led to conclusions relatively optimistic about the use of concrete with recycled concrete aggregates in environments with chlorides.
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Vázquez, E. (2013). Recycled Concrete. In: Vázquez, E. (eds) Progress of Recycling in the Built Environment. RILEM State-of-the-Art Reports, vol 8. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-4908-5_4
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DOI: https://doi.org/10.1007/978-94-007-4908-5_4
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