USE OF A FRACTION OBTAINED FROM USED CONCRETE AS SAND FOR THE PREPARATION OF CONCRETE OR MORTAR

The present invention relates to the use of a fraction having a particle size d10 greater than or equal to 150 µm, said fraction having a loss on ignition ranging from 3% to 30% and comprising: - from 20% to 80% of SiO2 ; - from 5% to 40% of CaO; - from 1% to 15% of Al2O3; and - from 0.5% to 4% of F...

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Bibliographic Details
Main Authors JACOB, Yvan-Pierre, POILLOT, Julien, GUILLEMIN, Hervé
Format Patent
LanguageEnglish
French
Published 09.02.2023
Subjects
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
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Summary:The present invention relates to the use of a fraction having a particle size d10 greater than or equal to 150 µm, said fraction having a loss on ignition ranging from 3% to 30% and comprising: - from 20% to 80% of SiO2 ; - from 5% to 40% of CaO; - from 1% to 15% of Al2O3; and - from 0.5% to 4% of Fe2O3; as sand for the preparation of concrete or mortar. La présente invention a pour objet l'utilisation d'une fraction dont la granulométrie d10 est supérieure ou égale à 150 µm, ladite fraction présentant une perte au feu variant de 3% à 30% et comprenant : - de 20% à 80% de SiO2 ; - de 5% à 40% de CaO; - de 1% à 15% d'Al2O3; et - de 0,5% à 4% de Fe2O3; comme sable pour la préparation de béton ou de mortier.
Bibliography:Application Number: WO2022FR51533