This invention generally relates to a mixing at least one material with at least one other material within an in-line mixing device. In one example embodiment methods, apparatuses, and systems are described to treat, reuse or otherwise remediate dredged or raw material from bottom sediment or other sources through the mixture of raw material and another material such as a hardening agent into a homogenous material for contamination remediation, use as construction materials or other uses.

A technique facilitates various types of cementing applications, such as a downhole cementing applications along a wellbore. The technique utilizes a mixer having a rigid body and a flexible skirt disposed along at least a portion of the interior of the rigid body. The mixer further comprises a cement blend inlet and a fluid inlet through which cement blend and fluid are introduced into the mixer to form a cement slurry. The flexible skirt is constructed to enable selective deformation, e.g. flexing, during formation of the cement slurry to reduce or prevent the formation of cement slurry caking within the mixer.

A technique facilitates various types of cementing applications, such as a downhole cementing applications along a wellbore. The technique utilizes a mixer having a rigid body and a flexible skirt disposed along at least a portion of the interior of the rigid body. The mixer further comprises a cement blend inlet and a fluid inlet through which cement blend and fluid are introduced into the mixer to form a cement slurry. The flexible skirt is constructed to enable selective deformation, e.g. flexing, during formation of the cement slurry to reduce or prevent the formation of cement slurry caking within the mixer.

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.

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.

A discharge gate for a gypsum slurry mixer is provided, and includes a gate adapter having an inlet opening configured for receiving the slurry, and an outlet opening configured for delivering the slurry to a dispensing device. The gate adapter has two different transitioning cross-sectional geometries at opposite ends. Specifically, the gate adapter includes an inlet section having a quadrilateral inlet opening; an outlet section having a substantially circular outlet opening; and a transition section sandwiched between the inlet and outlet sections.

A system for blending polymers and other chemicals in an aqueous liquid is provided. Static mixers and tubes, preferably in one or more tube bundles, provide a volume sufficient to allow a residence time in the system to hydrate a polymer. Static mixers may be integrated with a tube bundle. The system may be mounted on a portable base such as a trailer. The concentration of polymer and chemicals in water may be controlled by a controller. A variable speed electric pump or a metering valve may be utilized to precisely control the amount of polymers or other chemicals added to the aqueous liquid.

Disclosed is a method and system for blending a foam modifier with foaming agent online, e.g., as may be particularly useful for gypsum or cement slurries. The foam modifier comprises a fatty alcohol that is added to a gypsum or cement slurry that includes foaming agent, such as an alkyl sulfate surfactant. The fatty alcohol can be a C.sub.6-C.sub.16 fatty alcohol in some embodiments. The use of such a foam modifier can be used, for example, to stabilize the foam, reduce waste of foaming agent, improve void size control in the final product, and improve the gypsum board manufacturing process.

The invention relates to a dry mineral binder composition comprising cement and mineral fillers for the manufacture of molded parts by way of 3D printing. The binder composition additionally contains at least one aluminum sulfate-based accelerator, at least one polycarboxylate ether-based super-plasticizer and at least one rheology additive.

According to one or more embodiments of the present invention, modification of concrete within a pumping line is achieved with new designs of inline static mixers allowing passage of concrete material that is primarily of solids in the form of suspended minerals, cement and aggregates, and without benefit of the flow of additional fluid, such as the airflow driving a shotcrete process. According to one or more embodiments of the present invention, modification within a concrete pumping line is essential where unmodified concrete is necessary for purposes of batching or pumping, such as where the modification creates a very rapid set or an extreme thickening. According to one or more embodiments of the present invention, modification, unmodified concrete can be delivered to the point of inline modification at the end of a pumping line, where highly reactive components can then be intermixed. According to one or more embodiments of the present invention, this allows volume production of Roman Concrete or a hot mortar activated with quicklime, facilitates the inclusion of highly reactive shrinkage compensating agents, makes the use of alkali-activated or geopolymer concrete more practical for large-scale production, and makes possible very rapid additive-manufacturing methods with low-cost conventional delivered concrete.