There is a global need to preserve our environment and conserve our scarce natural resources for future generations. Concrete is the second most used material in the world after water. In addition, the construction sector produces a very huge amount of waste often deposited in storage facilities.

The recovery of this waste is becoming a major environmental issue. Reusing it in the form of aggregates for the manufacture of new concrete would not only preserve natural resources, but also limit pollution from landfills. The work of this paper presented here aims to improve the understanding of the behavior of recycled aggregate concrete.

For this fact, percentages between 5% and 20% of construction waste were introduced into the concrete replacing the sand. The Scanning Electron Microscopy (SEM) with EDS, the X-Ray Diffraction and X-Ray Fluorescence Microscopy of concrete with 0-20 wt% of recycled aggregate has been studied.

The results of X-ray fluorescence (XRF) analyses showed an abundance of calcium oxide and silicate (Quartz) which indicates a chemical composition similar to that of natural sand. The results of X-ray diffraction (XRD) analyses indicated the presence of calcite, portlandite and some minor peaks in the recycled aggregates, for SEM it was found that by the addition of 20% still the enrichment of the material in the chemical composition.

In this work, recycled aggregate was used as a direct replacement for natural sand in the production of concrete. Test results indicated that up to 20% of recycled aggregates had no effect on the main constituents of concrete.

concrete, recycled aggregate, recycling concrete to concrete, chemical analysis, circular economy.

Received: October 30, 2020; Accepted: December 12, 2020; Published: January 22, 2021

How to cite this article: Sara Belarouf, Abdelkrim Moufakkir, Abderrahim Samaouali, Hubert Rahier and Kamal Gueraoui, Chemical-mineralogical characterization of concrete with recycled concrete aggregates, JP Journal of Heat and Mass Transfer 22(1) (2021), 35-53. DOI: 10.17654/HM022010035

This Open Access Article is Licensed under Creative Commons Attribution 4.0 International License

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