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- W2023437524 abstract "This article presents the results of an experimental campaign on the influence of replacing natural aggregate with mixed recycled aggregate (MRA) in the mix design of non-structural concrete. Mixed recycled aggregates are those that come from construction and demolition waste treatment and include concrete waste, unbound aggregates and ceramic products as their predominant components. Specifically, a mix design suitable for manufacturing low-strength blinding concrete (15 MPa), medium-strength blinding/backfill concrete (25 MPa) and non-structural concrete for high-resistance precast elements (65 MPa) is proposed. According to the properties of mixed recycled aggregates, the conclusion drawn is that it is feasible to substitute about 40% of coarse aggregate in such a way that the resulting coarse aggregate mix complies with all the regulatory requirements analysed. The higher absorption capacity of mixed recycled aggregates means that special precautions in the mix design are required, since consistency may be affected. In a hardened state, the compressive, tensile and flexural strength properties decrease when the proportion of MRA increases. This decrease is proportionately higher when the concrete’s average compressive strength increases. At 90 days, the reduction in average compressive strength is less than 15% for replacements around 20% of the coarse aggregate." @default.
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- W2023437524 date "2012-02-01" @default.
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- W2023437524 title "Influence of the amount of mixed recycled aggregates on the properties of concrete for non-structural use" @default.
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- W2023437524 doi "https://doi.org/10.1016/j.conbuildmat.2011.06.073" @default.
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