The present invention relates to a building waterproofing kit-of-parts comprising A) an aqueous first composition, containing ao) water, a1) a ketone solvent and a2) a carboxylic acid and a3) an alkylalkoxysilane and/or a4) an aminoalkylalkoxysilane, and B) a second composition, containing b1) an alkylalkoxysilane and b2) a hydrocarbon solvent as well as b3) an alcohol solvent and/or b4) an ester solvent and/or b5) a ketone solvent. The invention further relates to the use of the kit-of-parts for the waterproofing of buildings and the elimination of moisture damage in buildings. The invention also relates to a liquid building waterproofing agent, obtained by blending the aforementioned compositions A) and B). Furthermore, the invention relates to an aqueous composition, containing 3.0 to 8.0% by weight of the ketone solvent a1), 0.1 to 1.2% by weight of the aminoalkylalkoxysilane a4), 0.1 to 1.2% by weight of the alkylalkoxysilane a3). 0.01 to 0.75% by weight of the carboxylic acid a2) and/or 88.85 to 96.79% by weight of water, and to the use thereof as a concentrate for the production of the composition A).

The present invention relates to a building waterproofing kit-of-parts comprising A) an aqueous first composition, containing ao) water, a1) a ketone solvent and a2) a carboxylic acid and a3) an alkylalkoxysilane and/or a4) an aminoalkylalkoxysilane, and B) a second composition, containing b1) an alkylalkoxysilane and b2) a hydrocarbon solvent as well as b3) an alcohol solvent and/or b4) an ester solvent and/or b5) a ketone solvent. The invention further relates to the use of the kit-of-parts for the waterproofing of buildings and the elimination of moisture damage in buildings. The invention also relates to a liquid building waterproofing agent, obtained by blending the aforementioned compositions A) and B). Furthermore, the invention relates to an aqueous composition, containing 3.0 to 8.0% by weight of the ketone solvent a1), 0.1 to 1.2% by weight of the aminoalkylalkoxysilane a4), 0.1 to 1.2% by weight of the alkylalkoxysilane a3). 0.01 to 0.75% by weight of the carboxylic acid a2) and/or 88.85 to 96.79% by weight of water, and to the use thereof as a concentrate for the production of the composition A).

Compositions and methods are presented that selectively dissolve calcium from a variety of cementitious materials without dissolving or otherwise degrading calcium silica hydrate (CSH). Preferably, contemplated compositions comprise guanidine bisulfate hydrochloride, which can be prepared from a reaction of urea, hydrochloric acid, and sulfamic acid. Therefore, it is especially contemplated that the compositions contemplated herein are particularly suitable to clean or otherwise condition surfaces of cured concrete, Portland cement-based material, or an aggregate containing CSH.

Compositions and methods are presented that selectively dissolve calcium from a variety of cementitious materials without dissolving or otherwise degrading calcium silica hydrate (CSH). Preferably, contemplated compositions comprise guanidine bisulfate hydrochloride, which can be prepared from a reaction of urea, hydrochloric acid, and sulfamic acid. Therefore, it is especially contemplated that the compositions contemplated herein are particularly suitable to clean or otherwise condition surfaces of cured concrete, Portland cement-based material, or an aggregate containing CSH.

A system and a method are provided for inhibiting pyrrhotite-caused damage to concrete structures. The system includes at least one concrete structure, a quantity of migratory corrosion-inhibiting solution, a quantity of concrete reinforcing solution, and a water sealing substance. The concrete structure can be any structure where the concrete aggregate contains pyrrhotite. The quantity of migratory corrosion-inhibiting solution is applied to the concrete structure to prevent further oxidation of pyrrhotite within the concrete structure. The quantity of concrete reinforcing solution is applied to the concrete structure to lower the porosity of the concrete structure and strengthen the overall integrity of the concrete structure. The water sealing substance is applied to the concrete structure to repel water from the concrete structure preventing any further chemical reactions with the pyrrhotite.

A system and a method are provided for inhibiting pyrrhotite-caused damage to concrete structures. The system includes at least one concrete structure, a quantity of migratory corrosion-inhibiting solution, a quantity of concrete reinforcing solution, and a water sealing substance. The concrete structure can be any structure where the concrete aggregate contains pyrrhotite. The quantity of migratory corrosion-inhibiting solution is applied to the concrete structure to prevent further oxidation of pyrrhotite within the concrete structure. The quantity of concrete reinforcing solution is applied to the concrete structure to lower the porosity of the concrete structure and strengthen the overall integrity of the concrete structure. The water sealing substance is applied to the concrete structure to repel water from the concrete structure preventing any further chemical reactions with the pyrrhotite.

Provided is a concrete hardener composition. The concrete hardener composition includes a sodium silicate compound, an acid compound and a balance amount of solvent. The sodium silicate compound includes sodium silicate or a mixture of sodium silicate and sodium methylsilicate. The acid compound includes acetic acid, glycolic acid, ethylenediaminetetraacetic acid, tartaric acid, nitric acid, boric acid or a combination thereof. The solvent includes water or a mixed solution of water and polyol. Based on the total weight of the concrete hardener composition, the content of silicon is between 5 wt % and 15 wt %, and the content of the acid compound is between 2 wt % and 30 wt %.

Provided is a concrete hardener composition. The concrete hardener composition includes a sodium silicate compound, an acid compound and a balance amount of solvent. The sodium silicate compound includes sodium silicate or a mixture of sodium silicate and sodium methylsilicate. The acid compound includes acetic acid, glycolic acid, ethylenediaminetetraacetic acid, tartaric acid, nitric acid, boric acid or a combination thereof. The solvent includes water or a mixed solution of water and polyol. Based on the total weight of the concrete hardener composition, the content of silicon is between 5 wt % and 15 wt %, and the content of the acid compound is between 2 wt % and 30 wt %.

A method of producing a CMC having a smooth surface includes forming a fiber preform; rigidizing the preform with an interphase coating; infiltrating a ceramic slurry into the preform to form a green body; conducting secondary operations on the green body; applying a slurry-based layer onto a portion of the green body; and infiltrating the green body with a molten silicon or silicon alloy, such that the CMC exhibits a smooth surface. The application of the slurry-based surface layer onto the green body includes placing the green body into a tool fixture having upper and lower components, such that a gap is present between the green body and at least one of the upper and lower components; and delivering a surface layer slurry into at least one gap, such that the surface layer slurry forms the slurry-based layer on at least a portion of the green body.

A method of producing a CMC having a smooth surface includes forming a fiber preform; rigidizing the preform with an interphase coating; infiltrating a ceramic slurry into the preform to form a green body; conducting secondary operations on the green body; applying a slurry-based layer onto a portion of the green body; and infiltrating the green body with a molten silicon or silicon alloy, such that the CMC exhibits a smooth surface. The application of the slurry-based surface layer onto the green body includes placing the green body into a tool fixture having upper and lower components, such that a gap is present between the green body and at least one of the upper and lower components; and delivering a surface layer slurry into at least one gap, such that the surface layer slurry forms the slurry-based layer on at least a portion of the green body.