INFLUENCE OF THE USE OF RECYCLED PRECAST DEBRIS IN THE MECHANICAL PROPERTIES OF CONCRETE

Author(s): Viviana Letelier, Ester Tarela, Rodrigo Osses, Juan Pablo Cádenas and Giacomo Moriconi
Book Title: III Progress of Recycling in the Built Environment
Editor: I. Martins, C. Ulsen and S. C. Angulo
e-ISBN: 978-2-35158-158-2
Publisher: RILEM Publications SARL
Publication year: 2015
Pages: 9-14
Total Pages: 8
Language: English

Abstract: In this investigation, concrete slabs from a building demolition are used, not only to replace natural coarse aggregates but also as recycled cement substitution, in the aim of reusing the most rejected material as possible optimizing its behavior. The effect of four parameters related to both replacements is quantified and compared to find the most efficient combination. The variables analyzed are: the percentage of recycled coarse aggregates replacing the natural ones, the percentage of recycled cement replacing the natural one, the maximum size of the recycled cement particles, and the temperature of rehydration of the recycled cement. The goal is to establish the participation rate of these parameters in the results, obtaining not only what combination returns the specimen with best mechanical behavior, but also which of the variables is the one that plays the most important role in the variation of the properties of the final material. The variable with the highest participation rate is the amount of recycled coarse aggregates. As expected, the material suffers a significant decrease in its compressive strength as the percentage of recycled aggregates increases. The size of the replaced cement particles also plays an important role in this result.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00