A manufacturing method is a method of manufacturing a composite material molded article containing acicular hydroxyapatite. This manufacturing method comprises: a preparation step of mixing at least a calcium phosphate compound including -tricalcium phosphate, a calcium compound containing no phosphorus, cellulose nanofibers, and an aqueous solvent consisting of water and/or a hydrophilic solvent to obtain a mixture; a molding step of forming a molded article by using the mixture; a drying step of drying the molded article; and a synthesis step of performing synthesis treatment of the molded article after drying.

The corrosion-preventing additive for reinforced concrete is a concrete additive for preventing corrosion of steel rebars in steel-reinforced concrete. The corrosion-preventing additive is a solution with an organic solvent, the solute being either gallic acid (3,4,5-trihydroxybenzoic acid), at least one ester of gallic acid, or combinations thereof. The weight-to-volume concentration of the solute to the organic solvent may be between 1% and 10% w/v. Reinforced concrete may be made using the corrosion-preventing additive by mixing the corrosion-preventing additive with a conventional concrete mixture (i.e., a mixture of an aggregate, water, and cement), with at least one steel rebar being embedded in the mixture, similar to conventional steel rebar reinforced concrete. The concentration of the corrosion-preventing additive with respect to the cement of the mixture may be between 0.0125 wt % and 1.0 wt %.

The corrosion-preventing additive for reinforced concrete is a concrete additive for preventing corrosion of steel rebars in steel-reinforced concrete. The corrosion-preventing additive is a solution with an organic solvent, the solute being either gallic acid (3,4,5-trihydroxybenzoic acid), at least one ester of gallic acid, or combinations thereof. The weight-to-volume concentration of the solute to the organic solvent may be between 1% and 10% w/v. Reinforced concrete may be made using the corrosion-preventing additive by mixing the corrosion-preventing additive with a conventional concrete mixture (i.e., a mixture of an aggregate, water, and cement), with at least one steel rebar being embedded in the mixture, similar to conventional steel rebar reinforced concrete. The concentration of the corrosion-preventing additive with respect to the cement of the mixture may be between 0.0125 wt % and 1.0 wt %.

Hydraulic binder reducing formulation, agent or additive for cementitious compositions, cementitious compositions containing same, and method of preparing the same. The binder reducing formulation comprises carbon nanotubes, preferably functionalized carbon nanotubes, most preferably carboxylic acid functionalized multi-wall carbon nanotubes. The binder reducing formulation may also comprise one or more of silane, glycerol, nanosilica and a surfactant. The cementitious compositions including the binder reducing formulation achieve strength values equal to or greater than strength values achieved with similar or identical cementitious compositions but devoid of the binder reducing composition.

A composition including: a first component A, includes: between 68 and 99.9 wt.-% of an aqueous dispersion of at least one polymer, the aqueous dispersion including the polymer with an amount of between 20 and 90 wt.-%; between 0 and 2 wt.-% of a nonionic or ionic dispersing agent; a second component B, includes: between 10 and 30 wt.-% of a nonionic, non-aqueous liquid carrier, between 0 and 20 wt.-% of calcium sulfate, between 10 and 89.9 wt.-% of at least one hydraulic binder, between 0 and 10 wt.-% of a thixotropy agent; wherein both components A and B are prepared and stored separately and mixed directly before application; and with the proviso that the first component A furthermore includes: between 0.1 and 15 wt.-% of a monovalent metal salt, and the second component B furthermore comprises: between 0.1 and 25 wt.-% of a polyamine.

A sealant is provided which is a curable resin external emulsion having a fluid internal phase comprising a curable material which expands during, after or before it cures. The resin external phase is, for example, an epoxy resin which may shrink as it cures. The internal phase is captured within micelles to provide discrete internal phase portions supported in an out resin matrix.

The invention concerns the use as a fluxant agent of at least one compound with the formula (I)

R.sup.1XRYR.sup.2(I) where: R.sup.1 and R.sup.2, which can be identical or different, are hydrocarbon chains, linear or branched, at C.sub.2-C.sub.11; each of X and Y, which can be identical or different, is an O(CO) group; (CO)O; NR(CO), where R represents a hydrocarbon atom or an alkyl radical at C.sub.1-C.sub.4, or (CO)NR, where R represents a hydrocarbon atom or an alkyl radical at C.sub.1-C.sub.4, the R group is a divalent hydrocarbon chain, at C.sub.1-C.sub.10, linear or branched, and possibly interrupted by one or more oxygen atom(s)
in a composition including a hydrocarbon binder for the preparation of the bituminous product based on solid mineral particles in contact with the said hydrocarbon binder, where the said compound of formula (I) is present in the said composition when the said composition is brought into contact with the said solid mineral particles.

An additive for a hydraulic composition, comprising flaky carbon and an organic compound containing a hydrophilic group and a hydrophobic group with a high affinity for carbon is capable of efficiently improving the strength of a hydraulic composition.

An additive for a hydraulic composition, comprising flaky carbon and an organic compound containing a hydrophilic group and a hydrophobic group with a high affinity for carbon is capable of efficiently improving the strength of a hydraulic composition.

A method for stabilizing a wellbore includes introducing a hardening agent into the wellbore, mixing the hardening agent with a carrier fluid in the wellbore to produce a wellbore stabilizing fluid, and treating a wellbore wall of the wellbore by contacting the wellbore stabilizing fluid to a surface of the wellbore wall for at least 48 hours. A wellbore stabilizing fluid includes a hardening agent and a carrier fluid. The hardening agent is selected from one of 10 to 100 g/L of the calcium hydroxide nanocrystals, 5 to 99.9% by volume of tetraethyl orthosilicate (TEOS), and 10 to 50 g/L of zinc sulfate. A stabilized wellbore includes a wellbore having a wellbore wall treated with a wellbore stabilizing fluid comprising a hardening agent. The Young's modulus of the treated wellbore wall is at least 5% higher than a Young's modulus of a non-treated wellbore wall.