A rebar anchoring system and method are provided. The system includes: a rebar, with an external thread formed on the periphery of at least one end; an anchoring head, with a first perforation and a second perforation disposed respectively at both ends extending axially into the anchoring head and communicating with each other, the inner sides of the first and second perforations being formed respectively with a first internal thread matching with the external thread of the rebar and a second internal thread, and the anchoring head being mounted on the end of the rebar through the first internal thread and the external thread of the rebar; and a bolt, having a screw rod matching with the second internal thread, the screw rod being locked into the second perforation of the anchoring head, and the end of the screw rod pressing against the end of the rebar.

A method for producing a partially contoured, fiber-reinforced plastic profile includes providing a plurality of first reinforcing fibers. The first reinforcing fibers are combined to produce a uni-, bi-, or tridirectional fiber bundle. The fiber bundle is impregnated with a first plastic matrix. The impregnated fiber bundle is supplied to a unit for at least partial shaping or for at least partial shaping and at least partial curing of the first plastic matrix to produce a fiber-reinforced plastic base element. Second reinforcing fibers are provided for at least partial application to the fiber-reinforced plastic base element. The fiber-reinforced plastic base element is provided with the second reinforcing fibers for at least partial fiber-reinforced profiling and/or shaping to produce an at least partially contoured, fiber-reinforced plastic strand and the at least partially contoured, fiber-reinforced plastic strand is cut to produce an at least partially contoured, fiber-reinforced plastic profile.

A method for producing a partially contoured, fiber-reinforced plastic profile includes providing a plurality of first reinforcing fibers. The first reinforcing fibers are combined to produce a uni-, bi-, or tridirectional fiber bundle. The fiber bundle is impregnated with a first plastic matrix. The impregnated fiber bundle is supplied to a unit for at least partial shaping or for at least partial shaping and at least partial curing of the first plastic matrix to produce a fiber-reinforced plastic base element. Second reinforcing fibers are provided for at least partial application to the fiber-reinforced plastic base element. The fiber-reinforced plastic base element is provided with the second reinforcing fibers for at least partial fiber-reinforced profiling and/or shaping to produce an at least partially contoured, fiber-reinforced plastic strand and the at least partially contoured, fiber-reinforced plastic strand is cut to produce an at least partially contoured, fiber-reinforced plastic profile.

A thermal insulation structure comprises a thermal insulation unit provided between a floor slab and a balcony slab. Tension rebars are formed in parallel in the floor slab and the balcony slab, but are not in the thermal insulation unit. Connection tension rebars which are parallel with each other pass through the thermal insulation unit and connect the tension rebars in the floor slab and the balcony slab. Shear rebars are formed inside the thermal insulation unit to connect and support the connection tension rebars. Auxiliary shear rebars horizontally connect the shear rebars to reinforce support.

A twisted helically-shaped member (15) in the form of a twisted tie, twisted fastener, twisted wire or twisted rod; said twisted helically-shaped member (15) having an axial core (12) and a plurality of helical threads (13H) extending along the axial core (12); and wherein a variation in lead measurements along the length of at least one helical thread (13H), is less than a variation in pitch measurements along the lengths of the helical threads (13H); wherein the axial core (12) has a transverse cross-sectional area comprising two-fifths or less of the transverse circumscribed cross-sectional area of the helical threads (13H).

A twisted helically-shaped member (15) in the form of a twisted tie, twisted fastener, twisted wire or twisted rod; said twisted helically-shaped member (15) having an axial core (12) and a plurality of helical threads (13H) extending along the axial core (12); and wherein a variation in lead measurements along the length of at least one helical thread (13H), is less than a variation in pitch measurements along the lengths of the helical threads (13H); wherein the axial core (12) has a transverse cross-sectional area comprising two-fifths or less of the transverse circumscribed cross-sectional area of the helical threads (13H).

The present invention relates to an anti-cracking assembly structure for door and window corner wall and anti-cracking component thereof. The anti-cracking components of the anti-cracking assembly structure for door and window corner wall has a plurality of protruding ribs and grooves formed at intervals on a surface thereof. The protruding ribs and grooves are arc-shaped and arranged in parallel to each other. When the reinforced concrete wall is subjected to an external force and stress is generated at the corner of the door and window frames, the stress can be guided along the arc-shaped protruding ribs and arc-shaped grooves on the surface of anti-cracking component to change the transmission direction of the force at the stress end, so as to transmit and disperse the stress to the peripheral side more quickly. Accordingly, it can more effectively prevent the occurrence of 45-degree shear cracks at the corners.

A concrete construction (100) made by 3D concrete printing that contains: two or more layers (102, 106) of cementitious material extruded one above the other, and at least one elongated steel element (104) reinforcing at least one of the layers (102, 106). The elongated steel element (104) has an elastic and plastic elongation at break that exceeds 4%. The high elongation of the elongated steel element gives an increased ductility to the concrete structure (100).

A thermal insulation structure comprises a thermal insulation unit provided between a floor slab and a balcony slab. Tension rebars are formed in parallel in the floor slab and the balcony slab, but are not in the thermal insulation unit. Connection tension rebars which are parallel with each other pass through the thermal insulation unit and connect the tension rebars in the floor slab and the balcony slab. Shear rebars are formed inside the thermal insulation unit to connect and support the connection tension rebars. Auxiliary shear rebars horizontally connect the shear rebars to reinforce support.

A twisted helically-shaped member (15) in the form of a twisted tie, twisted fastener, twisted wire or twisted rod; said twisted helically-shaped member (15) having an axial core (12) and a plurality of helical threads (13H) extending along the axial core (12); and wherein a variation in lead measurements along the length of at least one helical thread (13H), is less than a variation in pitch measurements along the lengths of the helical threads (13H); wherein the axial core (12) has a transverse cross-sectional area comprising two-fifths or less of the transverse circumscribed cross-sectional area of the helical threads (13H).