A self-reinforced masonry block comprises a main body having opposed substantially parallel stacking surfaces and at least one tubular cell defined therethrough from one stacking surface to the other. At least one confining reinforcement is embedded in the main body to surrounding a corresponding cell. Each confining reinforcement extends substantially entirely along the longitudinal length of its corresponding cell and terminates inwardly of the stacking surfaces. The self-reinforced masonry blocks may be used in construction of a grout-filled, vertically reinforced masonry block wall, with the self-reinforced masonry blocks being used for those portions of the wall where the grouted cells are prone to crushing due to high levels of compressive stress, and conventional unreinforced masonry blocks being used for other portions of the wall. A method for making the self-reinforced masonry blocks is also described.

A self-reinforced masonry block comprises a main body having opposed substantially parallel stacking surfaces and at least one tubular cell defined therethrough from one stacking surface to the other. At least one confining reinforcement is embedded in the main body to surrounding a corresponding cell. Each confining reinforcement extends substantially entirely along the longitudinal length of its corresponding cell and terminates inwardly of the stacking surfaces. The self-reinforced masonry blocks may be used in construction of a grout-filled, vertically reinforced masonry block wall, with the self-reinforced masonry blocks being used for those portions of the wall where the grouted cells are prone to crushing due to high levels of compressive stress, and conventional unreinforced masonry blocks being used for other portions of the wall. A method for making the self-reinforced masonry blocks is also described.

A seismic steel tubular column with internal local restraint and filled with high strengthen compound concrete containing normal-strength demolished concrete lumps, and a construction process. The seismic column includes a steel tube (1), high-strength fresh concrete (2), normal-strength demolished concrete lumps (3), horizontal stirrups (4), and longitudinal erection bars (5). The horizontal stirrups (4) are arranged at upper and lower ends inside the steel tube (1). The high-strength fresh concrete (2) is poured and the normal-strength demolished concrete lumps (3) are put alternately inside the steel tube (1). A compressive strength of the high-strength fresh concrete (2) is 30˜90 MPa greater than that of the normal-strength demolished concrete lumps (3).

A seismic steel tubular column with internal local restraint and filled with high strengthen compound concrete containing normal-strength demolished concrete lumps, and a construction process. The seismic column includes a steel tube (1), high-strength fresh concrete (2), normal-strength demolished concrete lumps (3), horizontal stirrups (4), and longitudinal erection bars (5). The horizontal stirrups (4) are arranged at upper and lower ends inside the steel tube (1). The high-strength fresh concrete (2) is poured and the normal-strength demolished concrete lumps (3) are put alternately inside the steel tube (1). A compressive strength of the high-strength fresh concrete (2) is 30˜90 MPa greater than that of the normal-strength demolished concrete lumps (3).

The present disclosure relates to the technical field of solid waste recycling and fabricated buildings, and provides a solid waste large-mixing-amount concrete prefabricated laminated slab and a preparation method thereof. The solid waste large-mixing-amount concrete prefabricated laminated slab provided by the present disclosure comprises a prefabricated layer and a laminated layer. Transverse grooves and longitudinal grooves are formed in the surface of the prefabricated layer. During application, the grooves can be used for erecting pipelines, the contact area of the prefabricated layer and the laminated layer can also be increased, the combined effect of new concrete and old concrete is improved, the integrity of a floor slab is enhanced, and the effect of improving the overall stress capacity of the floor slab is achieved.

The present disclosure relates to the technical field of solid waste recycling and fabricated buildings, and provides a solid waste large-mixing-amount concrete prefabricated laminated slab and a preparation method thereof. The solid waste large-mixing-amount concrete prefabricated laminated slab provided by the present disclosure comprises a prefabricated layer and a laminated layer. Transverse grooves and longitudinal grooves are formed in the surface of the prefabricated layer. During application, the grooves can be used for erecting pipelines, the contact area of the prefabricated layer and the laminated layer can also be increased, the combined effect of new concrete and old concrete is improved, the integrity of a floor slab is enhanced, and the effect of improving the overall stress capacity of the floor slab is achieved.

A cement-based artificial stone plate includes a cement-based plate body; and a metal mesh being embedded in the cement-based plate body; wherein the metal mesh is arranged with at least one fixing member, the fixing member defines a screw hole along its axis, and the screw hole of the fixing member is exposed on back of the cement-based plate body, and back of the plate body is provided with regular or irregular protrusions, between any two protrusions forms a groove, and bottom of each groove is close to the metal mesh.

A cement-based artificial stone plate includes a cement-based plate body; and a metal mesh being embedded in the cement-based plate body; wherein the metal mesh is arranged with at least one fixing member, the fixing member defines a screw hole along its axis, and the screw hole of the fixing member is exposed on back of the cement-based plate body, and back of the plate body is provided with regular or irregular protrusions, between any two protrusions forms a groove, and bottom of each groove is close to the metal mesh.

An Advanced Additive Construction device to extrude layers of cementitious material consistently and accurately with an anti-clogging method is disclosed. The device introduces low continuous frequency sonic vibrations with frequency range of 20- to 10000 Hz to slow cement or binding agents from curing the mixture inside the extruder and to get rid of air bubbles trapped in the mixture. Buildup of early cured mixtures inside the extruder tract especially in large volume or long period prints result in accumulation of material inside the extruder tract which causes extruder clogging. A shaker plate coupled with four miniature shakers excite the material mixture inside the extruder orthogonal to the inner casing direction. Furthermore, four more miniature shakers equipped with extension rods excite the material mixture inside the extruder orthogonal to the top mount, thereby preventing any cementitious material sticking within the extruder casing and around the central flight auger. Moreover, increasing the print speed and flow rate of the extruder by 60% which results in cutting the print time to more than 70% when counting the elimination of clogging. Also, it allows the extruder to accommodate a wider range of cementitious mixtures without the need to adjust admixtures and setting times especially for mixtures that have a rapid setting rate. The shaker's vibrating system, FIG. 7, functions within the upper chamber of the extruder casing, the upper chamber has the largest diameter as it operates as a flow control reservoir, which has less pressure compared to the lower chamber of the extruder. The vibrating rods and inner wall system prevent cementitious material from sticking to the extruder inner walls and allows smooth continuous flow of material.

An aspect concerns a method (10) of producing a precast building product. The method (10) includes providing a mould (26) to receive a pourable building substance to be cured. The method further includes the steps of pouring the building substance into the mould and allowing the poured building substance to cure inside the mould to form a sold mass body. The method further includes providing a wire-cutting assembly operatively associated with the mould and cutting the solid mass body inside the mould into separate building products.