33results about How to "Excellent resistance to chloride ion penetration" patented technology

The invention provides a marine ultra-high performance concrete and a preparation method thereof, comprising the following raw materials in parts by weight: 450-650 parts of cement, 50-200 parts of silica fume, 5-50 parts of nano-silica, and 100-200 parts of mineral powder 100-200 parts of fly ash, 1000-1300 parts of sand, 35-200 parts of steel fiber, 0.5-3.0 parts of polypropylene fiber, 1-10 parts of hydration heat inhibitor, 20-45 parts of admixture and 180 parts of water ‑220 copies. Compared with the prior art, it has good fluidity and fluidity retention ability, and lower slump loss. Moreover, it has low early hydration heat and good crack resistance; it also has excellent mechanical properties and high compressive strength. In addition, the ultra-high-performance marine concrete of the present invention has high compactness, excellent resistance to chloride ion penetration, and good durability in marine environments, so it has broad market prospects.

The invention discloses a kind of reinforced concrete anticorrosive paint in marine engineering and preparation method, comprising prime paint and surface paint, wherein the prime paint is composed of post agent of prime paint and curing agent of prime paint and the surface paint comprises post agent and curing agent of surface paint. The preparation method comprises: preparation technique of prime paint and preparation technique of surface paint, wherein the preparation technique of prime paint is composed of preparation technique of post agent of prime paint and preparation technique of curing agent of prime paint and the preparation technique of surface paint comprises preparation techniques of post agent and curing agent of surface paint. The invention can provide long anticorrosion to steel and concrete structure which is difficult to be kept for a long time in bad environment such as ocean, with excellent oil resistant and anti-chemicals performance, and good cathodic protectioncompatibility performance. The paint can be solidified and dried to form film in water with stronger ornament property.

High-strength wear-resisting mortar is characterized by being prepared from, by mass, 5.0-10.0% of superfine wear-resisting composite micro-powder (micro-sphere), 0.08-0.10% of steel-plastic fiber, 0.10-0.16% of additive, 1.3-2.7% of polymer gelatine powder, 69-74% of fine aggregate and 13.75% of cement through technological combination.The technological process mainly comprises the steps of material drying, pre-dispersion, fiber dispersion and vacuum sealed storage.The high-strength wear-resisting mortar has the excellent bonding property, cracking resistance, freezing resistance, seepage resistance, corrosion resistance, chloride penetration resistance and aging resistance of polymer cement mortar, and also has ultrahigh strength, scour-grind resistance, cracking resistance and gas etching resistance.

The invention discloses an underwater-curing long-acting anticorrosive coating for marine steel structures, and a preparation method thereof. The coating comprises a component A and a component B according to a weight ratio of 1.5:1 to 3:1; the component A comprises, by weight, 20-50 parts of phenolic modified epoxy resin, 3-8 parts of an active diluent, 25-55 parts of a filler, 0.2-1 part of a thixotropic agent, 0.3-1 part of a wetting dispersant, 0.3-0.8 part of an antifoaming agent and 0.3-1 part of a coupling agent; and the component B comprises, by weight, 20-70 parts of a curing agent Iand 30-80 parts of a curing agent II. A paint film produced by using the coating can be fast cured in a wet and even water environment, contains no solvents, has no pollution to the environment, and has good application properties. The coating has the advantages of excellent water curing and underwater curing performances, excellent corrosion resistance, excellent chloride ion permeation resistance, excellent adhesion, and excellent impact resistance.

The invention discloses a kind of reinforced concrete anticorrosive paint in marine engineering and preparation method, comprising prime paint, intermediate layer paint, surface paint, wherein the prime paint is composed of post agent of prime paint and curing agent of prime paint, the intermediate layer paint comprises post agent of intermediate layer and curing agent of intermediate layer, and the surface paint comprises post agent and curing agent of surface paint. The preparation method comprises: preparation technique of prime paint, preparation technique of intermediate layer paint andpreparation technique of surface paint, wherein the preparation technique of prime paint is composed of preparation technique of post agent of prime paint and preparation technique of curing agent ofprime paint, the preparation technique of intermediate layer paint comprises preparation technique of post agent of intermediate layer and preparation technique of curing agent of intermediate layer,and the preparation technique of surface paint comprises preparation techniques of post agent and curing agent of surface paint. The invention can provide long anticorrosion to steel and concrete structure which is difficult to be kept for a long time in bad environment such as ocean. The paint can be solidified and dried to form film in water with stronger ornament property.

The invention discloses granite stone powder concrete having strength grade not more than C40 and a preparation method of the granite stone powder concrete. The granite stone powder concrete is mainly prepared from a cementing material, water, sand, gravels and an admixture, wherein the cementing material is a mixture of cement and granite stone powder or a mixture of cement, mineral powder and granite stone powder, and the admixture is a water reducing agent. The granite stone powder concrete has early crack resistance, chloride penetration resistance and carbonation resistance, which are superior to those of the traditional concrete under a condition of meeting the strength requirement.