53 results about "Hydraulic lime" patented technology

The invention relates to high-performance durable natural hydraulic lime mortar for reinforcing and repairing rock and soil buildings and a preparation method thereof and belongs to the field of modified research of building materials and preservation materials of cultural relics. The mortar is prepared by partially replacing a main body cementing material natural hydraulic lime (NHL2) by silica fume and adding a certain amount of isobutyl triethoxy silane. The mortar prepared by the method has the characteristic of being light. The total amount of raw materials required for preparing the mortar in same volume, in particular the dosage of the natural hydraulic lime, is reduced. Both the water absorption and volume shrinkage of the modified mortar are reduced, and the service performance of the mortar is improved. The inner porous structure of the mortar is refined, and the mechanical strength is improved. The mortar can be applied to repairing buildings with higher strength designs. The preparation method improves the freeze-thaw resistance, acid corrosion resistance and salt expansion resistance of the mortar to a great extent, so that the mortar can better exert reinforcing and repairing effects.

The present invention relates to a method for applying, onto a substrate, mortar which contains a hydraulic binder and which is lightened by expansion, said method implementing a pump spray device including a mixing pump, an outlet pipe for said pump, and a spray nozzle attached to the outlet pipe, and including the following steps implemented continuously in the device: a) mixing an aqueous solution, containing a peroxide pore-forming agent, with a composition including at least one hydraulic binder, in the presence of a catalyst for the breakdown of the pore-forming agent, said binder being selected from among, or being a combination of: cement(s), in particular Portland cement; a pozzolan cement mixture optionally including fly ash, blast-furnace slag, silica fumes, and / or natural or calcined or synthetic pozzolans; aluminous cement; sulfoaluminous cement; belite cement; as well as the mixtures thereof, and / or hydraulic lime; and, immediately after, b) continuously spraying the resulting lightened mixture.

The invention discloses a hydrated and carbonized composite hardened cementing material based on steel slag and a preparation method thereof, belongs to the technical field of building materials, and solves the problems of high consumption, high energy consumption, large CO2 emission, low carbonized and hardened body strength and narrow application range in production of natural ore from hydraulic lime / natural hydraulic lime. The hydrated and carbonized composite hardened cementing material based on steel slag comprises the following raw materials: 25-30% of cement clinker, 20-25% of pretreated carbide slag, 1.5-2.0% of industrial byproduct gypsum, 3-5% of bentonite, 0.5-1.0% of a hydrated and carbonized accelerant and the balance of steel slag. The method comprises the following steps: preparing materials, selecting iron, and grinding into powder. The hydration and carbonization composite hardening cementing material based on the steel slag has good hydration hardening performance and carbonization hardening performance, a hardened body shows good mechanical performance in water, air and CO2 atmosphere, and the application field is widened.

The invention relates to a material for reinforcing and repairing stone ruins, and in particular to hydraulic oyster ash for repairing and protecting stone ruins. The hydraulic oyster ash for repairing and protecting stone ruins is obtained by roasting clam shells in a roasting furnace at 1000-1100 DEG C, discharging, then naturally cooling to an environmental temperature, and then crushing to 150 meshes. The hydraulic oyster ash for repairing and protecting stone ruins disclosed by the invention is mainly used for a cementing material for repairing brick stone ruins; the cementing material is obtained by uniformly mixing 150-mesh hydraulic oyster ash for repairing and protecting stone ruins with 100-mesh quartz sand in a mass ratio of 1:1; during use, a slurry material is prepared by uniformly proportioning and stirring the cementing material with water in a mass ratio of 100:50. The chemical composition, mineral constituents and physical mechanical properties of the hydraulic oyster ash for repairing and protecting stone ruins disclosed by the invention are basically similar to those of hydraulic lime NHL-2 for repairing stone ruins, which is introduced in the field of historical relics of China from Germany in recent years, can be used for solving the problems of strength, durability and weather resistance of the reinforced brick stone ruins, and a novel material which is firmly combined with brick stone is provided for repairing damaged brick stone relics.

The invention provides a molded article that uses hydraulic lime and a method for producing same. A molded article having a flexural strength of at least 7.5 N / mm2 and containing hydraulic lime subjected to calcium carbonate crystallization. A method for producing a molded article containing hydraulic lime, the method comprising (a) a step for press molding a mixture containing hydraulic lime andwater at a pressure of at least 5 N / mm2 and (b) a step for submitting the press-molded article yielded by (a) to a carbon dioxide cure.

The invention discloses grease lime and its preparation method. The grease lime is composed of lime and No.3 industrial grease, and the ratio of lime to No.3 industrial grease is 10: 1.2-1.5. The preparation method comprises the following steps: blending hydraulic lime and No.3 industrial grease in proportion, fully and uniformly stirring in a stirrer for 15-20 min to obtain a liquid state without oil balls, diluting with water to proper viscosity, and stirring for about 10 min. The preparation method is simple to operate, and has low requirement on experience of operators. In addition, quality of the product is high.