Method and apparatus for the preparation, placement, and compacting of components of fibrous concrete and mixtures thereof

A method for the preparation, placement, and compacting of fibrous concrete material components laid onto an object comprising the steps of:

• proving an apparatus having a plurality of capacities arranged in a predetermined sequence, a transportation means, and a dispensing means for unloading said fibrous concrete material components onto said object, said dispensing means consisting of a first rotor, a second rotor, and a third rotor, said first rotor and said second rotor being installed in an upper level, said third rotor being installed in a lower level;
• loading said capacities with predetermined loose material components;
• unloading dosed quantities of said loose material components in a predetermined sequence onto said transportation means thus forming a sandwich of said loose material components moved by said transportation means;
• unloading said sandwich onto said first rotor;
• converting said sandwich into a diverging flow directed onto said object with a predetermined direction and with a predetermined angle of scattering of said loose material components of said flow, said angle of scattering having different sectors, said loose material components having predetermined density distributions in said sectors;
• controlling speed of said loose material components and said density distributions in said different sectors of said angle of scattering during said conversion step;
• and
• reorienting said loose material components, said density distributions in said sectors, and controlling the direction of said loose material components within said angle of scattering;
• directing said diverging flow onto said object;
• and
• moving said apparatus and said object with respect to each other.

An apparatus for the preparation, placement, and compacting of components of fibrous concrete laid onto an object comprising:

• a rigid frame which can be installed above said object;
• a plurality of capacities for receiving a plurality of fibrous concrete components, said capacities being arranged in a predetermined sequence, said capacities having means for unloading dosed quantities of said fibrous concrete components;
• transportation means located under said capacities for receiving said dosed quantities, said transportation means having an unloading end and moving said plurality of fibrous concrete components in a predetermined direction;
• an additional capacity for receiving an additional fibrous concrete component, said additional capacity having means for dosed unloading of said additional fibrous concrete component;
• a dispensing means for laying and compacting a flow of said fibrous concrete components onto said object while said dispensing means and said object are moved with respect to each other, said dispensing means being located under said unloading end of said transportation means, said dispensing means having an upper level and a lower level comprising:
• a first body of rotation having an outer diameter;
• a second body of rotation having an outer diameter;
• a third body of rotation having an outer diameter, said first body of rotation and said second body of rotation being located in said upper level, said third body of rotation being located in said lower level, said outer diameter of said first body of rotation being equal to said outer diameter of said third body of rotation, said outer diameters of said first body of rotation and said third body of rotation being greater than said outer diameter of said second body of rotation, said first body of rotation having means for catching, holding, transporting, and throwing said fibrous concrete components onto said object and partially onto said second body of rotation, said second body of rotation having means for catching, holding, transporting, and throwing said fibrous concrete components onto said object, said third body of rotation having means for catching, holding, transporting, and throwing a part of said fibrous concrete components onto said object, said additional capacity having means for dosed periodic supply of said additional fibrous concrete component onto said first body of rotation, said third body of rotation having a first extreme position where said third body of rotation interferes with said flow, a second extreme position where said third body of rotation is beyond the limits of said flow, and means for moving and installing said third body of rotation between said first extreme position and second extreme position, said plurality of capacities is four and comprises a first hopper, a second hopper, a third hopper, and a fourth hopper, said plurality of fibrous concrete components comprising short fibers contained in said first hopper, course aggregate contained in said second hopper, long fibers contained in said third hopper, and a cement mortar contained in said fourth hopper, said first hopper, said second hopper, said third hopper, and said fourth hopper being arranged sequentially in the direction opposite to said predetermined direction.

A method for the preparation, placement, and compacting of fibrous concrete material components laid onto an object comprising the steps of:

• proving an apparatus having a plurality of capacities arranged in a predetermined sequence, a transportation means, and a dispensing means for unloading said fibrous concrete material components onto said object, said dispensing means consisting of a first rotor, a second rotor, and a third rotor, said first rotor and said second rotor being installed in an upper level, said third rotor being installed in a lower level;
• loading said capacities with predetermined loose material components;
• unloading dosed quantities of said loose material components in a predetermined sequence onto said transportation means thus forming a sandwich of said loose material components moved by said transportation means;
• unloading said sandwich onto said first rotor;
• converting said sandwich into a diverging flow directed onto said object with a predetermined direction and with a predetermined angle of scattering of said loose material components of said flow, said angle of scattering having different sectors, said loose material components having predetermined density distributions in said sectors;
• controlling speed of said loose material components and said density distributions in said different sectors of said angle of scattering during said conversion step;
• and
• reorienting said loose material components, said density distributions in said secors and changing the movement of said loose material components within said angle of scattering;
• directing said diverging flow onto said object;
• moving said apparatus and said object with respect to each other;
• said method producing on said object a compacted layer of fibrous concrete material with following contents by mass of the fiber components:
• 50 to 80% in the first direction which is a direction of laying the material components;
• 35 to 15% in the second direction which is a transverse direction perpendicular to said first direction;
• and 15 to 5% in the direction perpendicular to a plane which contains said first direction and said second direction, said transportation means comprising a conveyor.