Abstract: Disclosed is a cement or a refractory concrete composition, including, by weight, as compared to its total weight at least: (a) from 20% to 70% of at least one aluminum organic acid, (b) from 3% to 20% of at least one deflocculant chosen from a carboxylic acid polymer, a carboxylic acid, a salt thereof, or one of their combinations, and, (c) from 7% to 44% of at least one mineral oxide. Also disclosed is the use of such an adjuvant to improve the drying time of a refractory concrete composition or to improve the permeability of a refractory concrete composition, as well as a cement composition and to a refractory concrete composition, each including such an adjuvant.

Abstract: A safety device allowing the detachable connection between a canopy of a parachute and a parachute harness including a series of rings, harness ring, primary ring and secondary ring allowing the reduction of the traction exerted by the parachutist on the harness ring in order to release the canopy. The releasing ring advantageously presents a dimension in one direction greater with respect to any other dimension in any other direction.

Abstract: A safety device allowing the detachable connection between a canopy of a parachute and a parachute harness, including a series of rings, harness ring, primary ring and secondary ring, allowing the reduction of the traction exerted by the parachutist on the harness ring in order to release the canopy. The releasing ring advantageously presents a dimension in one direction greater with respect to any other dimension in any other direction.