What is disclosed is a cellulose-based product and a method for producing the aggregate admix product that includes the steps of thoroughly hydrating cellulose fibers, mixing clay and mineral particulates with a liquid to produce an emulsion, adding the emulsion to the hydrated cellulose fibers, and thoroughly impregnating the cellulose fibers with components from the emulsion and producing an aggregate admix product. The aggregate admix product is combined with cement and a liquid to create a cementitious product that can be directly sprayed onto building structures.

Described are compositions and methods for controlled strength development in a hydratable cementitious material, and more particularly to the use of polymerizable monomer components, which are initiated and activated by a redox pair which are mixed in controlled fashion, for enhancing non-hydration strength within the matrix of the plastic hydratable cementitious material before setting of the cementitious material begins. Exemplary applications include minimizing pressures on formwork for high fluid ready-mix applications, enhancing support and bonding properties for integrated concrete slab work and other sequential applications, or facilitating speedy 3D printing applications, among other unique possibilities.

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.

An accelerator for mineral binder compositions, especially for mortars or concrete, including: aluminium sulfate, at least one pozzolane, optionally at least one defoamer, and water. The accelerator is particularly useful for shotcrete, in the field of free-forming construction, or for additive manufacturing.

A method for the refurbishment of porous construction materials and a composition including Portland cement, calcined clay, and optionally aggregate to be used in the method for the refurbishment of porous construction materials. The method includes the steps of mixing water and a composition C, the composition C including, a) 100 mass parts of Portland Cement, b) 1-18 mass parts, preferably 1-10 mass parts, more preferably 1-7.5 mass parts, still more preferably 1-6 mass parts, especially 1-5 mass parts of calcined clay, c) optionally 10-250 mass parts of aggregates, applying the mixture thus obtained to a porous construction material, and optionally hardening the applied mixture.

A concrete product set by pouring a concrete slurry which includes a concrete mixture; a lithium-coated colloidal silica admixture; and optionally, at least one reinforcing fiber selected from the group of fibers. As the poured concrete slurry cures, the poured slurry hardens into a composite material product, and the concrete product defines capillary structures that at least in part fill with lithium-coated silica and lime. In another exemplary embodiment, wherein optional graphene oxide is used in the concrete slurry, the surrounding aggregate and cement is embedded with graphene oxide flakes. In another exemplary embodiment, the present invention is directed to a process for placing a jointless and/or fiberless slab. The process includes the steps of preparing a concrete slurry; pouring the concrete slurry onto substrate; and allowing the concrete slurry to cure. In another exemplary embodiment, the present invention is directed to the product itself.

A microfibrous shotcrete mixture which is used in mining applications, in highway, railway, subway tunnels, as excavation support element slope applications. The microfibrous shotcrete mixture provides a decreased amount of rebound. The objective of the present invention is to increase cohesion significantly and reduce the rebound amount in shotcrete up to four times by establishing a bridge between concrete particles by means of the special structure of the developed microfiber.

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 mixture for a thermal insulating plaster, especially a mixture for a thermal insulating plaster that contains aqueous solution of silicate, which contains 78 to 90 volume percent of hollow glass microspheres, 5 to 17 volume percent of aqueous solution of potassium silicate, 0.1 volume percent of water-glass-binder stabilizer, 1.5 to 5 volume percent of styrene-acrylate dispersion, 0.4 to 3 volume percent of aqueous colloidal solution of silver, 0.2 to 2.4 volume percent of tensides as an aerating agent, and 0.5 to 7 volume percent of water.

A shotcrete composition comprising a) a cementitious binder; b) an ettringite formation controller comprising (i) a glyoxylic acid condensate and/or a glyoxylic acid adduct; and c) an alkali-free, aluminum-based shotcrete accelerator. The invention further relates to a process comprising providing a cementitious composition comprising a) a cementitious binder, and b) an ettringite formation controller comprising (i) a glyoxylic acid condensate and/or a glyoxylic acid adduct; admixing an alkali-free, aluminum-based shotcrete accelerator to the cementitious composition to obtain a shotcrete composition; and applying the shotcrete composition onto a surface to obtain a shotcrete structure and allowing the shotcrete structure to harden. The invention also relates to a hardened shotcrete structure obtained by this process.