Disclosed is a sand aerated concrete panel pre-embedded with a wire box and a wire conduit and its preparation method. The concrete panel includes a sand aerated concrete panel, a steel bar mesh cage, a wire box and a wire conduit. The steel bar mesh cage includes a plurality of longitudinal main steel bars, a plurality of transverse auxiliary steel bars and a plurality of connecting iron pieces; the wire box and the wire conduit are fixed on the steel bar mesh cage; and the steel bar mesh cage, the wire box and the wire conduit are poured in the sand aerated concrete panel. The disclosure solves the problems of complicated procedures, high cost, environmental pollution caused by dust and noise in the prior art, avoids the potential quality hazards of the panels and wall structures caused by on-site slotting, reduces labor force, intensity and cost.

A concrete mat apparatus, includes a plurality of elongated concrete members, each member being aligned with and next to another concrete member. Each of the concrete members has an upper generally flat surface, a lower generally flat surface, and a plurality of inclined surfaces that each extend away from an upper or lower surface. Reinforcement extends from a first end portion of each concrete member to a second end portion thereof, the reinforcement including a plurality of longitudinally extending reinforcement bars and a plurality of encircling tie bars at spaced apart intervals. Cabling connects each of the elongated concrete members to another of the elongated concrete members. The upper inclined surfaces of one of the elongated concrete members forms a plane with the lower inclined surface of an adjacent elongated concrete member. A plurality of loops are provided along opposed edges of the mat.

Method and apparatus for casting prefabricated concrete products with a substantially horizontal slipform casting process, where the concrete mass is fed in at least one feeding stage to a slipform casting mold compacting and defining the product to be cast, wherein at least one part is embedded in the concrete mass after the at least one concrete mass feeding stage and before the final compaction of the upper surface of the product to be cast.

A concrete mat apparatus, includes a plurality of elongated concrete members, each member being aligned with and next to another concrete member. Each of the concrete members has an upper generally flat surface, a lower generally flat surface, and a plurality of inclined surfaces that each extend away from an upper or lower surface. Reinforcement extends from a first end portion of each concrete member to a second end portion thereof, the reinforcement including a plurality of longitudinally extending reinforcement bars and a plurality of encircling tie bars at spaced apart intervals. Cabling connects each of the elongated concrete members to another of the elongated concrete members. The combination of elongated concrete members has a width and a length that is at least twice as long as the width. The upper inclined surfaces of one of the elongated concrete members forms a plane with the lower inclined surface of an adjacent elongated concrete member. A plurality of loops are provided along opposed edges of the mat, each loop formed by a portion of the cabling. The loops can be spaced between about one and three feet (30.5 and 91.4 cm) apart.

Rebar, also referred to as reinforcing bar, is typically used to reinforce concrete to improve the tensile strength of elements made of concrete when constructing buildings, factories, bridges, nuclear power plants and other structures. There is a method of constructing an array (711) of rebars, the method comprising: automatically positioning a plurality of rebar such that they are spaced apart from one another to form an array (711); using an array interval spacing means (709) to maintain the spatial relationship of the rebar in the array; releasing the array from the array interval spacing means such that the array is placed in a target location and orientation for casting into concrete; and removing the array interval spacing means.

A construction method for a spatial aggregate reinforced 3D printed concrete structure, includes: selecting a structural member, performing mechanical analysis, and determining a basic dosage and a printing and weaving process of an implanted reinforcement, determining a type, positioning and dosage of a spatial aggregate, preparing 3D printing materials, editing an electromagnetic signal and positioning push program according to the selected positioning and dosage of the spatial rigid aggregate, the 3D printing material is extruded along the printing and weaving process and the spatial rigid aggregate is evenly scattered, and realizing the connection between spatial aggregates and the connection between the spatial aggregates and the reinforcements, a spatial aggregate reinforced 3D printed concrete structure is formed after layer-by-layer construction, superimposed and hardened, or after segmented printing, component nodes are connected through lap design of preset tenon and mortise and reinforcement.

Devices and methods for forming voids or cavities in concrete such that reinforcing bars can be used to connect different pours of concrete, the devices including an insert having a base and an elongate member extending from the base, and the method including coupling the insert to formwork, pouring concrete into the formwork, which surrounds the insert, allowing the concrete to partially cure, such that it retains its shape, removing the formwork and insert to form a void in the partially cured concrete, inserting a reinforcing bar into the void, applying adhesive to adhere the reinforcing bar to the concrete, and pouring concrete around the reinforcing bar, such that the reinforcing bar joins the two pours of concrete together via the void and adhesive.

The present disclosure relates to a precast base. The precast base comprises a precast concrete body, a plurality of corrugated steel pipes, and a lifting part. The precast concrete body comprises a top surface, a bottom surface opposite to the top surface, and a plurality of mounting holes, each of which penetrates from the top surface to the bottom surface of the precast concrete body. The plurality of corrugated steel pipes are respectively embedded in the plurality of mounting holes. The lifting part is embedded in the top surface of the precast concrete body and is close to the center of the top surface.

A wall assembly for a building structure, uses (i) an inner shell cast in a first mold to define a first panel of concrete having a plurality of stiffener members embedded in the concrete so as to be at least partly exposed at the inner side of the panel, and (ii) an outer shell cast in a second mold to define a second panel of concrete having a plurality of stiffener members embedded in the concrete so as to be at least partly exposed at the inner side of the panel. The inner shell and the outer shell are mechanically coupled after casting to define a mold cavity between the inner sides of the panels. Field concrete can be cast into the mold cavity between the inner and outer shells once the wall assembly is mounted on site into position within the building structure.