By homogeneously mixing a plurality of fluids, when mixing a gas with a liquid, it is possible to mix a large amount of gas into the liquid, so that large bubbles are not generated, and fine bubbles (in some cases, fine bubbles including microbubbles or ultra-fine bubbles) can be mixed into the liquid. A fluid mixing output apparatus of the present disclosure includes a housing and an internal structure accommodated in the housing. The housing is provided with a plurality of fluid supply ports for supplying at least a first fluid and a second fluid and a fluid outlet at its downstream end for outputting a plurality of fluids after mixing the plurality of fluids. The internal structure includes a first portion, a second portion, a third portion, and a fourth portion. The first portion includes a shaft portion and a vane spirally formed to generate a swirling flow in a fluid. The second portion is located downstream from the first portion, and includes a shaft portion and a plurality of protrusions protruding from an outer circumferential surface of the shaft portion. The third portion is located downstream from the second portion, and includes a shaft portion and a vane spirally formed to generate a swirling flow in a fluid. The fourth portion is located downstream from the third portion, and includes a shaft portion and a plurality of protrusions protruding from an outer circumferential surface of the shaft portion. One of the plurality of fluid supply ports of the housing is formed in a portion corresponding to the vane of the third portion, and the second fluid is supplied to the third portion and supplied to the fourth portion as a swirling flow while being mixed with the first fluid.

The invention provides methods and compositions for carbonation of cement mixes using pressurized carbon dioxide delivered to the mix.

The invention provides methods and compositions for carbonation of cement mixes using pressurized carbon dioxide delivered to the mix.

A microfluidic printing nozzle for 3D printing may include a mixing chamber, a first inlet for connecting with a first ink source, the first inlet located at a first end of the mixing chamber, and a second inlet for connecting with a second ink source, the second inlet located at the first end of the mixing chamber. An outlet may be located at a second end of the mixing chamber, and a generally cylindrical impeller may be rotatably disposed in the mixing chamber between the first end and the second end. The cylindrical impeller may include an outer surface, and the outer surface of the impeller includes a groove, a protrusion, or both, to facilitate mixing of fluidic inks flowing from the first end to the second end of the mixing chamber.

The present invention relates to an apparatus for producing rapid-hardening concrete and a method for producing same, the rapid-hardening concrete being produced by intermixing and dissipating air in normal concrete and adding an early-strength admixture thereto. With respect to forming rapid-hardening concrete, mixed concrete is formed by mixing in a large volume of air bubbles to be discarded, along with an early-strength admixture, to already mixed normal concrete, the early-strength admixture getting evenly dispersed therewithin by means of the ball bearing effect of the air bubbles, and when the mixed concrete is discharged, a rapid-hardening concrete is shotcreted while excess air contained in the mixed concrete is dissipated by means of high-performance air, the slump which was raised due to the large amount of air bubbles having been reduced to the slump range for normal concrete.

A tubular admixture piece for receiving in a mixing device for controlled metering in of an adjuvant into a pumpable mixture has at least one sealing element for producing an at least partially fluid-tight connection between the admixture piece and the mixing device wherein the at least one sealing element is designed as an axial seal with respect to a longitudinal axis of the tubular admixture piece. A housing element of a mixing device has at least a sealing support for axial sealing of the admixture piece, and is also configured to exert a force that acts on the admixture piece in the axial direction and/or longitudinal direction of the through-flow opening, such that the axial seal of an admixture piece received at least partially in the through-flow opening can be pressed against the sealing support by the force.

The present disclosure relates to a device for three-dimensional ink deposition from an impeller-driven active mixing microfluidic printing nozzle. The device is configured to receive a material property associated with the plurality of fluids and receive a structure property of the printing nozzle. The device then determines a threshold relation between a rotating speed of an impeller in the nozzle and a volumetric flow rate Q of fluids that flow through the nozzle based on the material property of the plurality of fluids, the structure property of the printing nozzle. Based on the threshold relation, the device then determines an actual volumetric flow rate of the fluids and actual rotation speed of the impeller.

Various embodiments of the invention include a method for combining slurry components to form a solid object. Various particular embodiments include a method including: combining a first slurry component with a second slurry component to form a homogenized slurry, wherein the first slurry component includes: a catalyst, and a vinyl binder, and wherein the second slurry component includes: a siloxane binder, and wherein at least one of the first slurry component and the second slurry component includes a particulate composition; introducing the homogenized slurry into a die; and curing the homogenized slurry in the die to form the solid object.

Various embodiments of the invention include an apparatus for forming an object. Various particular embodiments include an object forming apparatus including: at least two reservoirs for storing material components; a mixing device having an inlet and an outlet, the inlet of the mixing device being fluidly connected to the at least two reservoirs; and a die fluidly connected to the outlet of the mixing device, the die including an object manifold, wherein the mixing device and the die are a single unit detachable from the at least two reservoirs.

A shotcrete nozzle assembly comprising: a tubular body including a body sidewall defining a central passageway extending along a central longitudinal passageway axis, and water dispensing bores extending through the body sidewall and including: first and second sets of water dispensing bores positioned such that outlet openings thereof defined in an inner face of the body sidewall are disposed in a respective one of longitudinally spaced-apart first and second transversal planes extending perpendicularly to the passageway axis, at least some of the water dispensing bores being oriented such that the central bore axes thereof extend in a non-radial direction relative to the passageway axis, and such that an orthogonal projection of the central bore axes of the first and second sets of water dispensing bores onto one of the transversal planes forms first and second projected central bore axes which intersect each other at a first non-zero angle.