Abstract
At the end of their service life, concrete members can be demolished and reused as alternative constituents in the production of new concrete mixtures. This process leads to producing a sustainable construction material often referred to as Recycled Aggregates Concrete (RAC), in which ordinary aggregates are (partially or totally) replaced by Recycled Concrete Aggregates (RCAs). However, due to the intrinsic characteristics of RCAs (i.e., higher porosity in comparison with ordinary aggregates) the definition of reliable relationships, capable of predicting the relevant properties of RACs, is still considered an open issue. Moreover, in last years, the scientific community mainly focused on understanding the mechanical behavior of RAC at hardened state and only few studies addressed the properties at the fresh state.
The present paper investigates the influence of RCAs on the resulting rheological behavior of RACs. In fact, the higher porosity of aggregates generally modifies the actual amount of free water, which controls the resulting workability, according to the well-known Lyse’s rule. Moreover, the initial moisture condition of aggregates is a further aspect to be duly taken into account. Therefore, this study is mainly intended at extending to RAC some conceptual tools, such as the aforementioned Lyse’s rule and the simplified Bingham model, whose application is well-established for ordinary concrete mixture. With this aim, several experimental tests were performed (i.e., slump and rheometer test) in order to investigate the effect of various aspects and parameters, such as the processing procedures of RCAs, the actual aggregate replacement ratio and the initial moisture condition of coarse recycled aggregates.
Finally, it is worth highlighting that this work results from the SUPERCONCRETE Project (H2020-MSCA-RISE-2014 – n. 645704), funded by the European Union as part of the H2020 Programme.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsReferences
Amer, A.A.M., Ezziane, K., Bougara, A.: Rheological and mechanical behavior of concrete made with pre-saturated and dried recycled concrete aggregates. Constr. Build. Mater. 123, 300–308 (2016)
Belin, P., Habert, G., Thiery, M., Roussel, N.: Cement paste content and water absorption of recycled concrete coarse aggregates. Mater. Struct. 47(9), 1451–1465 (2014)
de Brito, J., Saikia, N.: Recycled Aggregate in Concrete: Use of Industrial. Construction and Demolition Waste. Springer Science & Business Media, London (2012)
de Larrard, F.: Concrete Mixture Proportioning: A Scientific Approach. CRC Press, Boca Raton (1999)
Koenders, E.A., Pepe, M., Martinelli, E.: Compressive strength and hydration processes of concrete with recycled aggregates. Cem. Concr. Res. 56, 203–212 (2014)
NBR 5733: High early strength Portland cement – Specification. ABNT (1991)
Pellegrino, C., Faleschini, F.: Sustainability Improvements in the Concrete Industry: Use of Recycled Materials for Structural Concrete Production. Springer, Cham (2016)
Pepe, M.: A Conceptual Model for Designing Recycled Aggregate Concrete for Structural Applications. Springer, Cham (2015)
Pepe, M., Toledo Filho, R.D., Koenders, E.A., Martinelli, E.: Alternative processing procedures for recycled aggregates in structural concrete. Constr. Build. Mater. 69, 124–132 (2014)
Pepe, M., Toledo Filho, R.D., Koenders, E.A., Martinelli, E.: A novel mix design methodology for recycled aggregate concrete. Constr. Build. Mater. 122, 362–372 (2016)
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2018 Springer International Publishing AG
About this paper
Cite this paper
Amario, M., Pepe, M., Martinelli, E., Toledo Filho, R.D. (2018). Rheological Behavior at Fresh State of Structural Recycled Aggregate Concrete. In: Hordijk, D., Luković, M. (eds) High Tech Concrete: Where Technology and Engineering Meet. Springer, Cham. https://doi.org/10.1007/978-3-319-59471-2_27
Download citation
DOI: https://doi.org/10.1007/978-3-319-59471-2_27
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-59470-5
Online ISBN: 978-3-319-59471-2
eBook Packages: EngineeringEngineering (R0)