Provided is a low-temperature-curable cross-section repair material which can be cured in a short period of time, even in extremely low temperature environments of −25° C., and which exhibits excellent workability and strength development. Also provided is a cross-section repairing method using the same. The low-temperature-curable cross-section repair material is characterized by: comprising 100 parts by of a radical polymerizable resin composition (A), 0.1-10 parts by of a hydroxyl group-containing aromatic tertiary amine (C-1), 0.1-10 parts by of an organic peroxide (D), and 1.0-500 parts by of an inorganic filler (E); and the radical polymerizable resin composition (A) comprising at least one type of radical polymerizable resin (A-1) selected from the group consisting of vinyl ester resins, urethane (meth)acrylate resins and polyester (meth)acrylate resins, and a radical polymerizable unsaturated monomer (A-2) having at least two or more (meth)acryloyl groups per molecule thereof.

A radical-polymerizable resin composition comprising one or more metal-containing compounds (A) selected from a metal soap (A1) and a β-diketone skeleton-containing metal complex (A2); one or more thiol compounds (B) selected from a secondary thiol compound (B1) and a tertiary thiol compound (B2); and a radical-polymerizable compound (C) can stably cure under a dry condition, in water and in seawater and further on a wet substrate. The radical-polymerizable resin composition is useful as a repairing material for inorganic structure, a radical-polymerizable coating composition, a concrete spall preventing curable material, a reinforcing fiber-containing composite material, etc.

A hydraulic composition includes in relative parts by mass with respect to first Portland cement: 100 parts of a first Portland cement the particles of which have a D50 between 10 and 25 μm; from 25 to 76 parts of a second Portland cement the particles of which have a D50 between 0.5 and 6 μm; from 85 to 200 parts of sand; water; the water content being such that the hydraulic composition includes from 170 to 250 kg of water per cubic metre of hydraulic composition; the volume distribution of particle size of the first Portland cement and of the second Portland cement being further such that the ratio D50 of the first Portland cement/D50 of the second Portland cement is greater than 2.

The invention relates to a method for obtaining a mineral substance from a base comprising mineral matter, the method comprising obtaining the base comprising a predetermined quantity of the mineral matter synthesised by a living structure or a portion of the latter, characterised in that obtaining the base comprises providing the living structure and providing at least one lactic acid microorganism suitable for symbiosis with the living structure for the synthesis of the mineral matter of the mineral substance. The invention also relates to a mineralising composition comprising a living structure, a lactic acid microorganism, a nutritive substance; the mineral substance used in the method; and the use of a combination of a living structure and a lactic acid microorganism in symbiosis with each other as a mineralising agent in a self-regenerating material.

A concrete and asphalt repair coating formulation includes a cement component and an aggregate component. The cement component includes a calcium sulfoaluminate cement and a Portland cement. The aggregate component includes coarse aggregates between 125-500 microns in diameter and fine aggregates between 5-62.5 microns in diameter.

A preparation method for a concrete additive for a maritime work environment includes: S1, compounding a volcanic ash material containing aluminum oxide and lime in proportion, loading a mixture into a sugar coating machine, and spraying a proper amount of alcohol, to prepare spherical particles; S2, adding the spherical particles in S1 and cement into the sugar coating machine, uniformly spraying deionized water in a rotating process, and coating surface layers of the spherical particles with a layer of cement for maintenance; and S3, placing the maintained particles in S2 into a hydrophobic emulsion, and coating the surface layers of the particles with a layer of hydrophobic emulsion, to obtain a concrete additive.

The present invention is the production method of ready injection material which aims to develop natural hydraulic lime in nano size by using a single raw material.

A packaged additive for preparing a cementitious composition comprises a water-soluble paper container and at least one non-liquid additive packaged within the water-soluble paper container. A kit for preparing a hardenable cementitious composition comprises the packaged additive and a separate packaged base cementitious material. Also disclosed is a method for preparing a hardenable cementitious composition using the packaged additive and separate base cementitious material components of the kit, and a method for repairing a flaw in a cementitious structure using the hardenable cementitious composition prepared with the packaged additive and the separate base cementitious material.

A chemical storage tank assembly for storing sulfuric compounds includes a plurality of bricks that is each comprised of basalt. In this way each of the bricks can resist ingress of sulfuric compounds into the bricks. The plurality of bricks are arranged to define a floor, a plurality of walls and a roof of a storage tank to contain sulfuric compounds. A grout is positioned between each of the bricks for binding the bricks together to define the storage tank. Additionally, the grout is comprised of calcium silicate to resist the ingress of sulfuric compounds into the grout.

A two-component system for forming adhesive bonds or for chemical anchoring comprises a curable binder component A and an activator component B. The component A comprises: A-1) an inhibited hydraulic binder selected from among calcium aluminate cement, calcium sulfoaluminate cement and mixtures thereof; the component B comprises: B-1) a curing activator. At least one of the components A and/or B comprises: V-1) an organic binder; and V-2) a filler having a Mohs hardness of at least 5. The system is an aqueous system which is unproblematical from a health point of view. It is easy to process and quickly attains high strengths.