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Volume 8
Issue 11
10.3390/app8112149
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Article

Investigation of the Use of Recycled Concrete Aggregates Originating from a Single Ready-Mix Concrete Plant

by
Eleftherios Anastasiou
*,
Michail Papachristoforou
,
Dimitrios Anesiadis
,
Konstantinos Zafeiridis
and
Eirini-Chrysanthi Tsardaka
Laboratory of Building Materials, Department of Civil Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
*
Author to whom correspondence should be addressed.
Appl. Sci. 2018, 8(11), 2149; https://doi.org/10.3390/app8112149
Submission received: 2 October 2018 / Revised: 26 October 2018 / Accepted: 31 October 2018 / Published: 3 November 2018
(This article belongs to the Special Issue New Trends in Recycled Aggregate Concrete)
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Abstract

The waste produced from ready-mixed concrete (RMC) industries poses an environmental challenge regarding recycling. Three different waste products form RMC plants were investigated for use as recycled aggregates in construction applications. Crushed hardened concrete from test specimens of at least 40 MPa compressive strength (HR) and crushed hardened concrete from returned concrete (CR) were tested for their suitability as concrete aggregates and then used as fine and coarse aggregate in new concrete mixtures. In addition, cement sludge fines (CSF) originating from the washing of concrete trucks were tested for their properties as filler for construction applications. Then, CSF was used at 10% and 20% replacement rates as a cement replacement for mortar production and as an additive for soil stabilization. The results show that, although there is some reduction in the properties of the resulting concrete, both HR and CR can be considered good-quality recycled aggregates, especially when the coarse fraction is used. Furthermore, HR performs considerably better than CR both as coarse and as fine aggregate. CSF seems to be a fine material with good properties as a filler, provided that it is properly crushed and sieved through a 75 μm sieve.
Keywords: ready-mixed concrete; recycled concrete aggregates; returned concrete; concrete sludge fines; soil stabilization ready-mixed concrete; recycled concrete aggregates; returned concrete; concrete sludge fines; soil stabilization

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MDPI and ACS Style

Anastasiou, E.; Papachristoforou, M.; Anesiadis, D.; Zafeiridis, K.; Tsardaka, E.-C. Investigation of the Use of Recycled Concrete Aggregates Originating from a Single Ready-Mix Concrete Plant. Appl. Sci. 2018, 8, 2149. https://doi.org/10.3390/app8112149

AMA Style

Anastasiou E, Papachristoforou M, Anesiadis D, Zafeiridis K, Tsardaka E-C. Investigation of the Use of Recycled Concrete Aggregates Originating from a Single Ready-Mix Concrete Plant. Applied Sciences. 2018; 8(11):2149. https://doi.org/10.3390/app8112149

Chicago/Turabian Style

Anastasiou, Eleftherios, Michail Papachristoforou, Dimitrios Anesiadis, Konstantinos Zafeiridis, and Eirini-Chrysanthi Tsardaka. 2018. "Investigation of the Use of Recycled Concrete Aggregates Originating from a Single Ready-Mix Concrete Plant" Applied Sciences 8, no. 11: 2149. https://doi.org/10.3390/app8112149

APA Style

Anastasiou, E., Papachristoforou, M., Anesiadis, D., Zafeiridis, K., & Tsardaka, E.-C. (2018). Investigation of the Use of Recycled Concrete Aggregates Originating from a Single Ready-Mix Concrete Plant. Applied Sciences, 8(11), 2149. https://doi.org/10.3390/app8112149

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