Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
235 words
Method of producing concrete in a mobile, automatically controlled concrete station for the production of concrete mixtures, comprising cement, aggregate material of gravel and sand, and water, with or without superplasticizers, characterized in that the aggregate material is added by means of a telescopic sorter device (2) comprising a plurality of collecting cells (3) and that a programmable amount of aggregate material is delivered from preselected cells through automatically controlled trap doors (4) to a weighing drum (6), and from that drum to a mixer drum (7), to which a preselected amount of water is added, and that the consistency of the concrete paste in the mixer drum is determined by directly measuring in said drum the electrostatic voltage drop and the resistance between the ends of the concrete paste, and that the consistency is controlled by adding an additional amount of water, and possibly of superplasticizers by presetting in the computer a nominal value of the amount of water and one or more nominal values (26, 27) of the amount of superplasicizers for said voltage drop value and said resistance value, and by first adding water, until the nominal value of water is reached and after that adding superplasticizers until the nominal values (26, 27) of superplasticizers are reached, said latter values being negative with respect to the nominal value of water, and thereafter discharging the mixed concrete for use at a building site.
Claim 2
Dependent Claim
235 words
Method of producing concrete in a mobile, automatically controlled concrete station for the production of concrete mixtures, comprising cement, aggregate material of gravel and sand, and water, with or without superplasticizers, characterized in that the aggregate material is added by means of a telescopic sorter device (2) comprising a plurality of collecting cells (3) and that a programmable amount of aggregate material is delivered from preselected cells through automatically controlled trap doors (4) to a weighing drum (6), and from that drum to a mixer drum (7), to which a preselected amount of water is added, and that the consistency of the concrete paste in the mixer drum is determined by directly measuring in said drum the electrostatic voltage drop and the resistance between the ends of the concrete paste, and that the consistency is controlled by adding an additional amount of water, and possibly of superplasticizers by presetting in the computer a nominal value of the amount of water and one or more nominal values (26, 27) of the amount of superplasicizers for said voltage drop value and said resistance value, and by first adding water, until the nominal value of water is reached and after that adding superplasticizers until the nominal values (26, 27) of superplasticizers are reached, said latter values being negative with respect to the nominal value of water, and thereafter discharging the mixed concrete for use at a building site.
Claim 3
Dependent Claim
41 words
A method according to claim 1, characterized in that the amount of water added to the mixture of cement and aggregate material is reduced by the amount of moisture water determined by means of moistness detectors (13) in the aggregate material.
Claim 4
Dependent Claim
30 words
A method according to claim 1, characterized in that the amount of aggregate material supplied is corrected with respect to the determined weight of moisture water in the aggregate material.