Provided herein are methods and compositions utilizing one or more cementitious replacement materials, one or more alkaline activating materials, and, optionally one or more bonding materials and/or one or more setting time enhancer materials.

The present invention relates to a descending type ceramic 3D printer comprising a rack, the middle part of the rack is provided with a charging block sealed with the four sides thereof, the lower part of the charging block is connected with a lifting device for printing, the lifting device for printing is mounted on the lifting mounting block arranged at the lower part of the rack, the upper left side of the rack is provided with a scraping device cooperating with the material in the charging block, the upper right side thereof is provided with a mounting rack, the mounting rack is provided with a light spot emission device and a light transmission block that cooperate with each other, and the mounting rack is further provided with a discharging device; the present invention aims to provide a descending type ceramic 3D printer in which the light transmission block and the light spot emission device are arranged above the charging block so that the charging block are descended gradually to realize the printing of the product, and when printing and feeding of each part finishes, the scraping device will scratch it flat, greatly guarantying the flatness of each printing, and ensuring the performance of the joint portions, thereby improving the quality of the product.

The present invention relates to a descending type ceramic 3D printer comprising a rack, the middle part of the rack is provided with a charging block sealed with the four sides thereof, the lower part of the charging block is connected with a lifting device for printing, the lifting device for printing is mounted on the lifting mounting block arranged at the lower part of the rack, the upper left side of the rack is provided with a scraping device cooperating with the material in the charging block, the upper right side thereof is provided with a mounting rack, the mounting rack is provided with a light spot emission device and a light transmission block that cooperate with each other, and the mounting rack is further provided with a discharging device; the present invention aims to provide a descending type ceramic 3D printer in which the light transmission block and the light spot emission device are arranged above the charging block so that the charging block are descended gradually to realize the printing of the product, and when printing and feeding of each part finishes, the scraping device will scratch it flat, greatly guarantying the flatness of each printing, and ensuring the performance of the joint portions, thereby improving the quality of the product.

A mixing-extruding head apparatus for a three-dimensional (3D) printer for building residential houses and other objects, which enables printing of right-angled corners, the apparatus comprising a container for mixing mortar, the container comprising a funnel (1), a two-part helix (6) inside the container for mixing the mortar for building said objects, wherein the two-part helix (6) is installed on a main axis (2) inside the funnel (1) and the helix (6) comprises an inner metal part (6a) and an outer rubber part (6b), and wherein the helix (6) has at least one thread (turn), and an exit nozzle (14). The bottom part of the exit nozzle (14) is on each of its sides equipped with one of four blades (17), which are controlled by a servo-pneumatic system with computer-controlled commands for building the objects, wherein each of the blades is connected to a piston moved by a pneumatic cylinder; wherein all four pneumatic cylinders are connected with four electromagnetic valves, which generate pneumatic signals.

Disclosed is a block press and associated process, for dynamically forming a block mold, to produce a masonry block. In some embodiments, the block mold includes a plurality of mold elements, such as a lower impact plate, an upper impact plate, and a plurality of side plates, and can further include one or more block cores. In operation, one or more of the mold elements are moved to dynamically forming a block mold, which is then filled with product formula. The product formula is then compressed, to form a masonry block. One or more of the mold elements are then released, such as to release pressure on the formed masonry block, and to allow removal of the formed masonry block from the block press, wherein the formed masonry block can be moved to a curing area, and the block press can reform the block mold for subsequent production.

Disclosed is a block press and associated process, for dynamically forming a block mold, to produce a masonry block. In some embodiments, the block mold includes a plurality of mold elements, such as a lower impact plate, an upper impact plate, and a plurality of side plates, and can further include one or more block cores. In operation, one or more of the mold elements are moved to dynamically forming a block mold, which is then filled with product formula. The product formula is then compressed, to form a masonry block. One or more of the mold elements are then released, such as to release pressure on the formed masonry block, and to allow removal of the formed masonry block from the block press, wherein the formed masonry block can be moved to a curing area, and the block press can reform the block mold for subsequent production.

The present invention relates to a concrete containing a binding blend of Portland cement and calcium sulphoaluminate-based cement; the use of the concrete for implementing under-rail railway foundations, as well as a method for the production of the concrete.

There is provided apparatus (301) for mixing contents of a receptacle, the apparatus comprising a rotary shaft (302) equipped at a proximal end with a connection for removable attachment to a means of providing rotation. The rotary shaft has a mixing element (303) fixedly connected at a distal end of the shaft opposite to said proximal end. The mixing element comprises at least two arms (304) at the distal most end of the shaft, a corkscrew neck (306) on the shaft and a collar (305) on the shaft positioned in between the at least two arms and the corkscrew neck. The at least two arms are configured in a first partially-open resting position and are moveable to a second fully-open operative position. The mixing element further comprises a blade (307) positioned across the shaft more proximally than the corkscrew neck.

There is provided apparatus (301) for mixing contents of a receptacle, the apparatus comprising a rotary shaft (302) equipped at a proximal end with a connection for removable attachment to a means of providing rotation. The rotary shaft has a mixing element (303) fixedly connected at a distal end of the shaft opposite to said proximal end. The mixing element comprises at least two arms (304) at the distal most end of the shaft, a corkscrew neck (306) on the shaft and a collar (305) on the shaft positioned in between the at least two arms and the corkscrew neck. The at least two arms are configured in a first partially-open resting position and are moveable to a second fully-open operative position. The mixing element further comprises a blade (307) positioned across the shaft more proximally than the corkscrew neck.

A device for producing a concrete includes a cement premixer for mixing a cement suspension, the cement premixer having an ultrasonic probe for preparing a cement suspension, a crystallization tank arrangement with the first crystallization tank, for increasing the early strengths of the concrete, and a concrete mixer for producing a concrete mixture from the premixed cement suspension, in particular with the addition of aggregates.