An assembly of concrete structural elements includes a first and a second concrete lower column, and a first and a second column capitals are supported on respective upper ends of the respective first and second lower columns. At least one inverted beam is extended between the first and second column capitals. At least one lower flat surface of the inverted beam is positioned on respective edges of the first and second column capitals.

An assembly of concrete structural elements includes a first and a second concrete lower column, and a first and a second column capitals are supported on respective upper ends of the respective first and second lower columns. At least one inverted beam is extended between the first and second column capitals. At least one lower flat surface of the inverted beam is positioned on respective edges of the first and second column capitals.

The present invention relates to improved concrete elements, particularly to self-prestressed, high-performance concrete elements (SP-HPC elements); to cementitious compositions suitable, for producing such concrete elements; to methods of manufacturing such concrete elements and such cementitious compositions; to the use of specific components in concrete elements and cementitious mixtures. The compositions and elements described herein comprise an effective amount of expansive agents in combination with superabsorbent polymers (SAP) and shrinkage reducing admixtures (SRA), and optional further components as defined in the claims. The present invention further provides for improved tendons, suitable for SP-HPC elements.

The present invention relates to improved concrete elements, particularly to self-prestressed, high-performance concrete elements (SP-HPC elements); to cementitious compositions suitable, for producing such concrete elements; to methods of manufacturing such concrete elements and such cementitious compositions; to the use of specific components in concrete elements and cementitious mixtures. The compositions and elements described herein comprise an effective amount of expansive agents in combination with superabsorbent polymers (SAP) and shrinkage reducing admixtures (SRA), and optional further components as defined in the claims. The present invention further provides for improved tendons, suitable for SP-HPC elements.

System and method allows a component to attach to a pre-cast, pre-stressed concrete structure. The system includes a first attachment part, a pre-cast, pre-stressed concrete member and first and second reinforcing members. A first body of a first attachment part has a first concrete structure facing side and a first plurality of attachment members. The pre-cast, pre-stressed concrete member is formed from uncured cement. At least a portion of the attachment members are embedded within the pre-cast, pre-stressed concrete member. The first reinforcing member is placed under a first tension load and the second reinforcing member is placed under a second tension load. The pre-cast, pre-stressed concrete member is formed from uncured cement poured about at least a portion of the first and second reinforcing members while the first and second reinforcing members are under stress.

The present invention concerns a concrete strip, the strip comprising conventional concrete and a combined reinforcement of both post-tension steel strands and fibers, said post-tension steel strandshaving a diameter ranging from 5 mm to 20 mm, having a tensile strength higher than 1700 MPa, said fibers being either steel fibers and being present in a dosage ranging from 5 kg/m.sup.3 to 90 kg/m.sup.3 or being non-steel fibers and being present in a dosage ranging from 0.6 kg/m.sup.3 to 25 kg/m.sup.3, whereby the strip has a thickness, whereby further the length of the strip is according to the formula:length of the strip>30strip thickness.

A structural element for constructions comprising a structure (2) made of concrete and/or geopolymer and/or alkali activated material and at least one strip (3) made of a fibre-resin composite.

Such strip surrounds at least part of said structure (2), compressing it. The strip also at least partly surmounts an external surface (20) of said structure (2).

The present invention relates to a precast concrete member using a PC member, which comprises a prefabricated plate and fixing channels, and is used as a linear member for a column which is an axial force member, as a planar member for a wall which is an axial force member, or as a linear member for a beam or a girder which is a flexural member. A preferred embodiment of the present invention provides a premade precast concrete member having a PC body formed at a predetermined length and multiple steel reinforcements embedded within the PC body along the longitudinal direction, the precast concrete member comprising: a plate assembly in which a pair of board-like plates having a pair of coupling holes formed to be penetrated at a regular interval are formed so as to be spaced apart from each other and to face each other, or two pairs of board-like plates are spaced apart from each other so as to face each other, with one end of each thereof being embedded into one or both longitudinal ends of the PC body, and the other ends thereof protruding, wherein the plate assembly comprises a connecting member of which a part embedded into the PC body of the plate is welded to one side of the steel reinforcement, and both ends are respectively bolt-coupled to the coupling holes of a pair of plates so as to connect a part embedded into the PC body of a pair of facing plates; and fixing channels which comprise a U-shaped channel having an opening formed on the top thereof and multiple anchor bodies coupled to the rear surface of the U-shaped channel, the opening of the U-shaped channel comprising a rib which is formed to be bent inwardly, wherein at least two rows of fixing channels are embedded at regular intervals into one side surface of the width direction of the PC body or into at least one pair of corresponding surfaces of the width direction of the PC body.

The present invention relates to a precast concrete member using a PC member, which comprises a prefabricated plate and fixing channels, and is used as a linear member for a column which is an axial force member, as a planar member for a wall which is an axial force member, or as a linear member for a beam or a girder which is a flexural member. A preferred embodiment of the present invention provides a premade precast concrete member having a PC body formed at a predetermined length and multiple steel reinforcements embedded within the PC body along the longitudinal direction, the precast concrete member comprising: a plate assembly in which a pair of board-like plates having a pair of coupling holes formed to be penetrated at a regular interval are formed so as to be spaced apart from each other and to face each other, or two pairs of board-like plates are spaced apart from each other so as to face each other, with one end of each thereof being embedded into one or both longitudinal ends of the PC body, and the other ends thereof protruding, wherein the plate assembly comprises a connecting member of which a part embedded into the PC body of the plate is welded to one side of the steel reinforcement, and both ends are respectively bolt-coupled to the coupling holes of a pair of plates so as to connect a part embedded into the PC body of a pair of facing plates; and fixing channels which comprise a U-shaped channel having an opening formed on the top thereof and multiple anchor bodies coupled to the rear surface of the U-shaped channel, the opening of the U-shaped channel comprising a rib which is formed to be bent inwardly, wherein at least two rows of fixing channels are embedded at regular intervals into one side surface of the width direction of the PC body or into at least one pair of corresponding surfaces of the width direction of the PC body.

A concrete structural element is provided that includes a concrete matrix; a steel reinforcing structure embedded in said matrix; at least first and second attitude sensors at a distance from one another in a direction, embedded in said matrix and fixed to said reinforcing structure; and a processing circuit configured to recover attitude measurements supplied by each attitude sensor and configured to compute a deformation of said structural element relative to said direction as a function of the attitude measurements recovered.