216results about How to "Fast hardening" patented technology

The invention provides a cement-based composite material for powder-bonding three-dimensional (3D) printing. The material is prepared from the following components in parts by weight: 1 part of cement, 0-5 parts of sand, 0-5 parts of a mineral admixture, 0-0.2 part of an expanding agent, 0-0.2 part of a toughening agent, 0-0.2 part of mineral pigment, 0.1-0.5 part of water, 0-0.25 part of polymer emulsion, 0.001-0.05 part of an additive and 0-0.03 part of fibers, wherein the cement is selected from one or a mixture of more in silicate cements, sulphoaluminate cement, high belite sulphoaluminate cement, aluminate cement, fluoroaluminate cement, aluminosilicate cement, phosphate cement or magnesium oxide cement; the additive is selected from one or a mixture of more in a water reducing agent, an early strength agent or a coagulating regulating agent. After being contacted with water, the cement-based composite material can be hardened, thus not needing a great deal of polymer adhesive; the cement-based composite material is rapid and controllable in hardening speed; the cement-based composite material is small in deformation in the hardening process, thus being suitable for a powder-bonding 3D printing technology. The invention also provides a method for carrying out powder-bonding 3D printing by using the cement-based composite material.

The invention relates to the preservative coating technology, in particular to a water-based two-pack polyurethane preservative coating and a preparation method thereof. The water-based two-pack polyurethane preservative coating comprises two parts, namely paint vehicle and curing agent, wherein the paint vehicle is prepared from water-based hydroxylated acrylic dispersion, modified resin, pigment, filler, additive and water, the curing agent part comprises hydrophilic aliphatic isocyanate, dodecyl ester and propylene glycol methyl ether acetate. When using the coating of the invention, the weight ratio of the paint vehicle to the curing agent is 74-85:15-26 and the coating can solve the defects of the existing preservative coating.

The present invention provides an inorganic foaming thermal-insulation mortar and a preparation method thereof, and belongs to the technical field of building material preparation. The thermal-insulation mortar comprises a cementing material, expanded perlite particles, a macromolecule polymer, a coagulant, an early strength agent, a physical foaming agent, a chemical foaming agent hydrogen peroxide, a chemical foaming agent foaming catalyst, a hydrophobic agent, reinforced short fibers and water. According to the present invention, the inorganic foaming thermal-insulation mortar can be directly coated on the wall and the roof requiring the thermal-insulation treatment, the thickness of the inorganic thermal-insulation mortar layer can be adjusted within 10-100 mm, screeding finishing construction is performed before the cementing material is subjected to final setting, and hardening is performed to obtain the inorganic thermal-insulation mortar layer with characteristics of good durability, good water resistance and good heat insulation, wherein the inorganic thermal-insulation mortar layer never sheds, and has the same service life as the building being subjected to thermal-insulation by the inorganic thermal-insulation mortar layer; and the raw material cost is low, and significant economic benefits and environmental benefits are provided.

The invention relates to an inorganic composite heat insulation material, which is prepared from the following raw materials in part by weight: 100 parts of common silicate cement, 10 to 30 parts of quick hardening sulfate aluminum cement, 10 to 30 parts of gypsum powder, 10 to 40 parts of admixture, 20 to 40 parts of mineral fiber, 150 to 200 parts of vitrified micro bubbles, 4 to 8 parts of re-dispersible latex powder, 2 to 4 parts of cellulose ether, 0.1 to 0.3 part of starch ether, 0.2 to 1.0 part of water reducing agent, 0.2 to 0.6 part of retarder, 1 to 3 parts of early strength agent, 0.5 to 3 parts of water repellent, and 0.02 to 0.06 part of air entraining agent. The raw materials are mixed uniformly to prepare dry powder, and the dry powder and water are mixed in a weight ratio of 1: (0.8-1.2) and stirred to form slurry for use. The inorganic composite heat insulation material has good workability, quick strength development, high construction efficiency, good adhesive property, low drying shrinkage, heat insulation, hydrophobic property, fire resistance and durability.

The invention provides a spray-coating sealing material for coal rock mass, belonging to the technical field of organic/inorganic compound materials. The spray-coating sealing material for the coal rock mass is a complex of high-molecular emulsion and high-flame-retardant powder materials, without any toxic and harmful substances, free of springback for construction, safe and environmental protective. When sprayed at vertical surfaces and top surfaces, the material does not flow and sag, and is good in overall effect. After curing, the coating has advantages of strong adhesion stress, high tensile strength, large tensile deformation, and excellent sealing performance. The material can be used for surface protection of the coal rock mass, air leakage prevention, gas leakage prevention, and rapid surface protection and moistureproof treatment after tunneling of swelling rock.

The invention discloses preparation of coated sand by the use of a phosphate inorganic binder and a molding method thereof. Preparation of the coated sand comprises the following steps: uniformly mixing the phosphate inorganic binder and quartz sand; heating and drying to a semi-dry state; adding calcium stearate with the granularity being 600 meshes and uniformly mixing; and drying and cooling so as to obtain the phosphate inorganic binder coated sand which is in a dry arenaceous state. During molding of the coated sand, the coated sand undergoes hydration only by high temperature steam, the binder is dissolved, sand grains are connected, and finally hot-air is blown for drying and curing molding. The hardening speed is fast. During preparation and curing molding of the coated sand, smell or any harmful gas or substance is not generated. The sand mould has low gas-forming property, is harmless to the health of workers, causes no pollution to the environment and is energy-saving and environmentally friendly. The coated sand provided by the invention has characteristics of high strength, high temperature resistance, low gas evolution, no curing agent required for molding and good storage stability.

The invention discloses geopolymer foamed light aggregate concrete. The material is composed of slag-fly ash composite micro powder, an alkali activator, inorganic super-light aggregate, high-molecular polymer powder, inorganic staple fibers, a hydrogen peroxide chemical foaming agent, a foaming catalyst, an inorganic porous carrier and a foam stabilizer. The method for preparing the geopolymer foamed light aggregate concrete comprises the following steps: mixing and manufacturing various components according to a certain ratio. The problems that the strength of the conventional cement-based foam concrete material is greatly decreased when used for high-temperature insulation and foams and bubbles difficultly grow due to too fast setting of slag-based geopolymer foamed cement and the like can be effectively solved. Therefore, the durability of the foamed light aggregate geopolymer concrete layer is obviously improved, and the light aggregate concrete can be used for promoting energy-saving insulation of low-temperature and normal-pressure building envelopes, decreasing the dead weight of walls and reducing CO2 emission, contributes to improving ecological and economic benefits and is extremely convenient in construction. The construction cost and material cost can be greatly reduced.

The invention belongs to the technical field of building materials and specifically discloses binary system quick-drying thick-layer cement self-leveling mortar. The binary system quick-drying thick-layer cement self-leveling mortar is mainly composed of the following ingredients (by weight): 25-30% of ordinary Portland cement, 5-8% of sulfoaluminate cement, 1.5-3% of calcium oxide, 2-5% of fine sinking beads and 40-45% of dried river sand of 12-140 meshes, etc. According to the binary system quick-drying thick-layer cement self-leveling mortar, one-time construction thickness reaches 50 mm, existing ground artificial plaster can be directly replaced, construction speed is fast, construction period is greatly shortened, and flatness is high. After construction, the ground can be directly coated with floor paint, and wooden floorboards and PVC boards can be paved or large-sized flat bricks can be directly paved by the use of a glue for tiles by a thin-layer full adhesion method.

The invention belongs to the field of inorganic binders for casting, and particularly discloses a high-modulus inorganic binder. The high-modulus inorganic binder comprises the following materials, by weight, 5-25 parts of anionic surfactants, 1-75 parts of flow promoting agents, 10-25 parts of accelerative activators, 5 parts of curing agents, 30 parts of nano silicon oxide, 20 parts of nano zinc oxide, 20 parts of hydrogenated starch, 10 parts of phosphate and 5 parts of carbonate. With the adoption of the high-modulus inorganic binder, the liquidity, the moisture resistance, the strength, a hardening rate, the collapsibility and the like of inorganic binder bonded sand can be improved effectively.

The invention discloses an environment-friendly and efficient UV paint spraying line. The environment-friendly and efficient UV paint spraying line comprises an electric control cabinet, a first motor, an automatic dust removing device, a preheating device, a UV primer paint spraying device, a first tunnel, a UV finish paint spraying device, a second tunnel, a UV curing device, a material driving belt, a second motor and a material storing box; and the first motor, the automatic dust removing device, the preheating device, the UV primer paint spraying device, the first tunnel, the UV finish paint spraying device, the second tunnel, the UV curing device and the second motor are electrically connected with the electric control cabinet, the material driving belt is arranged between the first motor and the second motor, and the automatic dust removing device, the preheating device, the UV primer paint spraying device, the first tunnel, the UV finish paint spraying device, the second tunnel and the UV curing device are sequentially arranged from left to right and connected through the material driving belt. According to the environment-friendly and efficient UV paint spraying line and a technology thereof, UV paint is sprayed to a workpiece, and then a product which is high in surface hardness, wear resistance and glossiness is obtained.

The invention provides a non-fired material. The non-fired material comprises, by weight, 63-75 parts of coal gasification coarse slag, 15-25 parts of cement and 10-12 parts of quartz sands; and a mass ratio of the coal gasification coarse slag to the cement is (4-5):1 or (2-2.52):1. Compared with materials in the prior art, the non-fired material has the following advantages: the coal gasification coarse slag, cement and quartz sands are mixed according to a certain ratio, the quartz sands are used to supplement glass in the coal gasification coarse slag, and the cement is used to improve theactivity of the coal gasification coarse slag, so the hardening speed of the non-fired material is accelerated, and the strength of the non-fired material is increased.

The invention relates to a binding agent, a preparation method and a grinding wheel, and belongs to the technical field of abrasives and grinding tools. The binding agent is mainly prepared from the following raw materials by mass percent: 70% to 85% of gypsum, 1% to 12% of glass fiber powder and 8% to 18% of clay. According to the binding agent, the raw materials coact with each other in a limited dosage proportion range, so that a compound high-temperature sintered product has relatively high strength, proper hardness and good plasticity; during preparation of the grinding wheel, the binding agent is mixed with water according to a suitable proportion, the forming speed is high, sintering is not carried out in the follow-up steps, and only natural drying or accelerated drying is required; sintering is not required, and the hardening speed is high, so that various problems like cracking and foaming occurring in traditional ceramic bond sintering are avoided; the binding agent is applicable to grinding wheels for low-speed and high-precision grinding, and the prepared grinding wheel is sharp and is high in grinding efficiency; the binding agent is applicable to various abrasives, the holding force for the abrasives is good, and the binding agent has universality; and the raw materials of the binding agent are easy to obtain, the cost is low, and the binding agent is applicable to large-scale industrial production.

The invention relates to a construction method using modified collapsible loess as roadbed filler and is designed for realizing roadbed filling by using modified loess. The construction method using the modified collapsible loess as the roadbed filler comprises construction survey and setting out, feeding, primary leveling, cement spreading, mechanical mixing, secondary leveling, roller compactionand compaction degree detection, wherein the filler is cement-incorporated loess, in which the cement is incorporated into the loess in an admixing method, and the admixture content is 4%, 5% or 6%.According to the invention, special treatment measures are taken on collapsible loess that could not be used in the past, to make the collapsible loess to be used as the roadbed filler, thus the organic combination of farmland, ecological protection and sustainable development of waste recycling is realized, and the construction method is of great significance to the treatment of roadbed engineering in loess areas.