There is disclosed a paving member comprising: a body having a base configured to be supported on a ground surface and a surface configured to support traffic thereon, the body comprising a combination of aggregate and cement mixed at a ratio of 5:1 such that the body is permeable to water to facilitate collection of water therein and delivery of said water to said ground surface.

Apparatus, systems, and methods for applying plaster compositions to block substrates to yield a product having the appearance of cut stone. An example apparatus includes: a manifold; a mold connected to the manifold with a channel to receive the block substrate; a delivery hose connected to a top of the manifold to deliver plaster composition to the manifold for application to the block substrate; a pressure release hose connected to the manifold; and a vibrating mechanism connected to the mold. A system further includes a conveyor that moves block substrates through the mold. An example method includes: wetting a surface of a block substrate; moving the block substrate through an application apparatus as described, applying a layer of plaster composition to a surface of the block substrate, vibrating the mold and block substrate during application of the plaster composition, and allowing the plaster composition to harden.

An extruder apparatus for the extrusion of a strand of building material for 3D printing of a structural part includes an extruder nozzle and at least one cover element. The extruder nozzle has a discharge opening for the discharge of the strand of building material out of the extruder apparatus. The at least one cover element is designed to cover at least a part of the discharge opening such that an opening cross section of at least one uncovered part of the discharge opening specifies a strand cross section of the discharged strand of building material.

An apparatus for automatically extruding and forming a finished concrete channel in a drainage ditch. The apparatus includes a frame having support rails for positioning the apparatus over a drainage ditch. A concrete-receiving hopper is attached to the frame for delivering received concrete into the ditch to be shaped into a channel form. A mold having a projection to define a concrete surface of the channel is positioned beneath a top portion of the frame and configured to be received in a hollow mating portion of a laterally-reciprocating piston to shape the received concrete. A lever driver drives the reciprocating piston through a mechanically-linked motor. A vibrator cooperates with the concrete-receiving hopper to urge received concrete into the ditch to be shaped by the mold.

Apparatus, systems, and methods for applying plaster compositions to block substrates to yield a product having the appearance of cut stone. An example apparatus includes: a manifold; a mold connected to the manifold with a channel to receive the block substrate; a delivery hose connected to a top of the manifold to deliver plaster composition to the manifold for application to the block substrate; a pressure release hose connected to the manifold; and a vibrating mechanism connected to the mold. A system further includes a conveyor that moves block substrates through the mold. An example method includes: wetting a surface of a block substrate; moving the block substrate through an application apparatus as described, applying a layer of plaster composition to a surface of the block substrate, vibrating the mold and block substrate during application of the plaster composition, and allowing the plaster composition to harden.

Apparatus, systems, and methods for applying plaster compositions to block substrates to yield a product having the appearance of cut stone. An example apparatus includes: a manifold; a mold connected to the manifold with a channel to receive the block substrate; a delivery hose connected to a top of the manifold to deliver plaster composition to the manifold for application to the block substrate; a pressure release hose connected to the manifold; and a vibrating mechanism connected to the mold. A system further includes a conveyor that moves block substrates through the mold. An example method includes: wetting a surface of a block substrate; moving the block substrate through an application apparatus as described, applying a layer of plaster composition to a surface of the block substrate, vibrating the mold and block substrate during application of the plaster composition, and allowing the plaster composition to harden.

An apparatus for automatically extruding and forming a finished concrete channel in a drainage ditch. The apparatus includes a frame having support rails for positioning the apparatus over a drainage ditch. A concrete-receiving hopper is attached to the frame for delivering received concrete into the ditch to be shaped into a channel form. A mold having a projection to define a concrete surface of the channel is positioned beneath a top portion of the frame and configured to be received in a hollow mating portion of a laterally-reciprocating piston to shape the received concrete. A lever driver drives the reciprocating piston through a mechanically-linked motor. A vibrator cooperates with the concrete-receiving hopper to urge received concrete into the ditch to be shaped by the mold.