The purpose of the present application is to provide a fiber composite for reinforcing concrete, the fiber composite providing a specific number of twists so as to have pull-out resistance in concrete, being capable of serving as a concrete reinforcement since hydrophilic compound, which can bind to concrete by hydrogen bonding, is coated on concrete and the fiber composite, maintaining the shape of fibers when mixed into concrete, reducing a rebound rate during shotcrete placing, and maintaining linearity within concrete.

An epoxy grout composition for marine repairs contains: a liquid epoxy resin comprising up to 15 wt. % benzyl alcohol and having a viscosity of 220 to 1100 cps; a liquid hardener comprising up to 25% benzyl alcohol and having a viscosity of 50 to 85 cps and, wherein the total benzyl alcohol content of the combined resin and hardener ranges from 1 to 12 wt. %; and preferably, a particulate inorganic filler comprising 10 to 50 wt. % of particles under 150 μm and 50 to 90 wt. % of particles between 150 μm and 1.18 mm. The composition is particularly suitable for placement in the annular space between a marine structure and a fiberglass composite jacket. The composition may be provided in kit form, with premeasured containers of resin, hardener, and filler. A related method is also disclosed.

A system and method for applying a construction material is provided. The method may include mixing blast furnace slag material, geopolymer material, alkali-based powder, and sand at a mixing device to generate a non-Portland cement-based material. The method may also include transporting the non-Portland cement-based material from the mixing device, through a conduit to a nozzle and combining the transported non-Portland cement-based material with water at the nozzle to generate a partially liquefied non-Portland cement-based material. The method may further include pneumatically applying the partially liquefied non-Portland cement-based material to a surface.

A method for sealing of surfaces comprising the steps of: (a) supplying a first grouting composition; (b) introducing a second component to said first grouting composition to form a third grouting composition; and (c) forming a sealing barrier on a surface from said third grouting composition.

Described herein are compositions comprising hemp, minerals, and water. Such compositions may be used in construction, building materials, insulation, etc. Such compositions may be sprayed, poured, cast, molded, etc.

A method for the manufacture of foamed plaster utilizing a mixture of powdered casting plaster, powdered limestone and hemp fibre. The mixture is fed into a Venturi apparatus (40) under the influence of gravity. Compressed air may be supplied to the Venturi apparatus (40) through an inlet pipe (41) causing air and solid particles to be sucked into the Venturi apparatus (40). The elongated tube is provided with an inlet nozzle arranged to receive a mixture of water mixed with detergent agents. Further, the tube (50) is provided with an inlet nozzle (56) arranged to receive compressed air such that the elongated tube (50) delivers the mixture to a mixing and spray head (60) so as to feed the resulting mixture to a moulding means.

A spin caster for spraying a surfacing material upon an interior surface of a vessel includes a spin head configured to rotate about an axis, the spin head including an input port, and a supply line coupled to the input port and configured to convey a first material to the spin head and a second material to the spin head. The supply line comprises a first channel configured to convey the first material to the spin head and a second, different channel configured to convey the second material to the spin head.

The invention involves an exposed aggregate architectural coating to be applied to existing concrete structures. The invention includes a method of preparing and roughening an existing concrete structure surface, mixing the components of the exposed aggregate architectural coating, applying the coating to the existing concrete structure, spreading the coating to a thickness of one-fourth of an inch or thinner, using a trowel, gauge rake, or other method to smoothen the coating, allowing the coating to cure, applying a surface retarder once the exposed aggregate architectural coating has stiffened, allowing the surface retarder to cure for twenty-four hours, and washing the surface with a pressure-washer to remove the surface retarder, then “acid-washing” the surface to remove residue and create a desired texture. The resulting applied exposed aggregate architectural coating will have an exposed aggregate finish that is durable and suitable for high vehicular and pedestrian traffic areas.

A system and method for applying a construction material is provided. The method may include mixing blast furnace slag material, geopolymer material, alkali-based powder, and sand at a batching and mixing device to generate a non-Portland cement-based material. The method may also include transporting the non-Portland cement-based material from the mixing device, through a conduit to a nozzle and combining the transported non-Portland cement-based material with liquid at the nozzle to generate a partially liquefied non-Portland cement-based material. The method may further include pneumatically applying the partially liquefied non-Portland cement-based material to a surface.

A cementitious protective coating material including a mixture of water, one or more of silicon dioxide/sodium silica pozzolans, anhydrous or hydrous sodium or potassium metasilicate; a rheology enhancing admixture; sodium tetraborate, sodium citrate dihydrate, citric acid, or boric acid; and a micro-fiber.