Abstract: Calcium silicate-based cements and concretes are disclosed, which result in concrete compositions that have an increased durability. A cement product includes a plurality of particles of a carbonatable calcium silicate cement and a hydrophobic organic acid, or a salt thereof, or a silane, or a polysiloxane.

Abstract: Calcium silicate-based cements and concretes are disclosed, which result in concrete compositions that have an increased durability. A cement product includes a plurality of particles of a carbonatable calcium silicate cement and a hydrophobic organic acid, or a salt thereof, or a silane, or a polysiloxane.

Abstract: An electronic bracelet for displaying an interactive digital content to be projected onto a zone of an arm, includes an emitter of a light beam in a non-visible frequency band forming a light sheet designed to cover a first zone of an arm; a projector projecting an image over a second zone, the first zone substantially overlapping with the second zone; a first detector acquiring an image of the second zone; a computer determining at least one position of at least one interaction point of the light beam by analysing a trace of the image acquired by the first detector.

Abstract: A projection device for displaying interactive digital content intended to be projected onto a surface, the projection device including a projection housing including a part forming a support pedestal, the projection housing including: an emitter for emitting a light beam in a non-visible frequency band, forming a light sheet that is intended to cover a first zone of a surface; a projector for projecting an image onto a second zone; a first detector for capturing an image of the second zone; and a computer for determining at least one position of at least one interaction point of the light beam by analysis of a trace of the image acquired by the first detector.