The present invention relates to a method and system for producing concrete products by casting method by means of casting moulds assembled from corresponding outer and inner moulds, having a program-controlled, automated circulation system having a hardening area 420, a program-controlled, automated manufacturing area 100 and a conveying unit 200. The system also has a manually operable mould assembly unit having mould assembly stations M1 to M4 for manually assisted assembly of a casting mould from corresponding outer and inner moulds, wherein the conveying unit comprises a supply conveying section 222 set up to supply a casting mould assembled in the manually operable mould assembly unit to the automated circulation system under program control.

The present invention relates to a method and system for producing concrete products by casting method by means of casting moulds assembled from corresponding outer and inner moulds, having a program-controlled, automated circulation system having a hardening area 420, a program-controlled, automated manufacturing area 100 and a conveying unit 200. The system also has a manually operable mould assembly unit having mould assembly stations M1 to M4 for manually assisted assembly of a casting mould from corresponding outer and inner moulds, wherein the conveying unit comprises a supply conveying section 222 set up to supply a casting mould assembled in the manually operable mould assembly unit to the automated circulation system under program control.

A lightweight aggregate-based non-steam-cured high-performance pipe culvert and a preparation method thereof. The lightweight aggregate-based non-steam-cured high-performance pipe culvert is prepared from a raw material including the following components by mass per unit volume: 300-450 kg/m.sup.3 of a low-carbon sulfur-aluminum-ferric cementitious material; 800-920 kg/m.sup.3 of a solid waste-based lightweight aggregate; 300-550 kg/m.sup.3 of a solid waste-based artificial sand; 0-100 kg/m.sup.3 of a mineral admixture; 0-50 kg/m.sup.3 of an auxiliary material; and 110-160 kg/m.sup.3 of water; and the lightweight aggregate-based non-steam-cured high-performance pipe culvert further includes a water reducer and a retarder. The lightweight aggregate-based non-steam-cured high-performance pipe culvert of the present invention can be demolded within 4 hours during forming, with short demolding time and no need for steam curing, resulting in a low production cost and high production efficiency. The obtained product has high strength, good impermeability and durability, and can utilize solid waste in a high proportion.

A lightweight aggregate-based non-steam-cured high-performance pipe culvert and a preparation method thereof. The lightweight aggregate-based non-steam-cured high-performance pipe culvert is prepared from a raw material including the following components by mass per unit volume: 300-450 kg/m.sup.3 of a low-carbon sulfur-aluminum-ferric cementitious material; 800-920 kg/m.sup.3 of a solid waste-based lightweight aggregate; 300-550 kg/m.sup.3 of a solid waste-based artificial sand; 0-100 kg/m.sup.3 of a mineral admixture; 0-50 kg/m.sup.3 of an auxiliary material; and 110-160 kg/m.sup.3 of water; and the lightweight aggregate-based non-steam-cured high-performance pipe culvert further includes a water reducer and a retarder. The lightweight aggregate-based non-steam-cured high-performance pipe culvert of the present invention can be demolded within 4 hours during forming, with short demolding time and no need for steam curing, resulting in a low production cost and high production efficiency. The obtained product has high strength, good impermeability and durability, and can utilize solid waste in a high proportion.

The present disclosure provides a precast column and a method for manufacturing the same, in which the precast column includes a base, a main structure, multiple main reinforcing bars and a concrete structure. The base includes multiple couplers disposed on a bottom mold and multiple stirrups surrounding the multiple couplers. One side of the main structure is connected to the base, and the main structure includes a hollow tube disposed inside the main structure. The multiple main reinforcing bars pass through the main structure, one end of each of which is connected to the corresponding one of the multiple couplers. The concrete structure covers the base, the main structure and the multiple main reinforcing bars.

The present disclosure provides a precast column and a method for manufacturing the same, in which the precast column includes a base, a main structure, multiple main reinforcing bars and a concrete structure. The base includes multiple couplers disposed on a bottom mold and multiple stirrups surrounding the multiple couplers. One side of the main structure is connected to the base, and the main structure includes a hollow tube disposed inside the main structure. The multiple main reinforcing bars pass through the main structure, one end of each of which is connected to the corresponding one of the multiple couplers. The concrete structure covers the base, the main structure and the multiple main reinforcing bars.