98 results about "Calcium formate" patented technology

The invention belongs to the technical field of nanocrystal nucleus early strength agents, and provides a damp and hot nanocrystal nucleus early strength agent, a tailing solidification filling material and a preparation method and application of the damp and hot nanocrystal nucleus early strength agent and the tailing solidification filling material. The invention discloses a molybdenum ore tailing slurry which is prepared from the following raw materials in parts by weight: 1 part of Portland cement, 4 to 6 parts of molybdenum ore tailings, 0.06 to 0.1 part of zeolite powder, 0.07 to 0.1 part of nanoscale attapulgite powder, 0.06 to 0.1 part of gamma-glycidyl ether oxypropyl trimethoxy silane, 0.03 to 0.1 part of potassium silicate, 0.04 to 0.1 part of sodium hydroxide, 0.06 to 0.1 part of calcium formate, 0.04 to 0.1 part of lithium metaaluminate and 1.25 to 1.75 parts of water. According to the technical scheme, the problem that a filling body prepared from an early strength agent in the prior art is low in early and later strength is solved, and meanwhile, the early strength agent is simple and convenient in preparation mode, low in cost and wide in application range.

The invention discloses a basalt fiber reinforced ceramic tile binder and a preparation method thereof, and belongs to the technical field of ceramic tile binders. The basalt fiber reinforced ceramic tile binder is prepared from the following raw materials in parts by weight: 30 to 35 parts of cement, 40 to 50 parts of quartz sand, 1 to 2 parts of basalt fiber, 5 to 8 parts of calcium formate, 1 to 3 parts of redispersible latex powder, 1 to 1.5 parts of organic silicon modified polyurethane and 0.2 to 0.5 part of cellulose ether. The basalt fiber reinforced ceramic tile binder prepared by the invention has the advantages of relatively low slippage distance, good tensile bonding strength, water resistance, high temperature resistance and freeze thawing resistance stability.

The invention relates to a coal gangue-based temperature control and humidity control material for 3D printing and a preparation method thereof, two wastes of coal gangue and camellia oleifera shells are taken as main raw materials, the purpose of treating wastes with wastes is realized, the concept of circular economy is met, and the cost is low. Rapid hardening is achieved through calcium formate, rheology controllability is achieved through a rheology modifier, and the core problems of the 3D printing material in the aspects of printability and early strength are successfully solved. The functions of temperature control (phase change microcapsules) and humidity regulation (air entraining-fiber porous system) are integrated in a printing material, so that a printed building component becomes an intelligent environment regulator. Due to the addition of the camellia oleifera shell fibers, humidifying is assisted, the reinforcing and toughening effects are achieved, and the integrity and long-term durability of a printed component are improved.

The invention belongs to the technical field of building materials, and provides an early-strength cement-based grouting material and a preparation method thereof.The early-strength cement-based grouting material is prepared from, by weight, 500-600 parts of sulphoaluminate cement, 200-300 parts of Portland cement, 40-100 parts of lithium slag, 1-3 parts of a coagulant, 0.5-1 part of an early strength agent, 5-8 parts of a water reducing agent, 0.5-2.5 parts of a thickening agent, 0.3-0.9 part of a defoaming agent and 260-310 parts of water; the coagulant is sodium metaaluminate and / or potassium metaaluminate; the early strength agent is selected from one or more than two of lithium carbonate, lithium sulfate, calcium formate, calcium acetate, calcium propionate, calcium butyrate and nano silicon dioxide. According to the technical scheme, the problems of poor dispersion resistance and low early strength of a cement-based grouting material in a flowing water environment in the prior art are solved.

This invention discloses a crude calcium formate crystallization system, relating to the field of chemical inorganic salt preparation technology. It includes several reaction vessels, a transfer tank, a purification system, a centrifuge, a concentration system, and a high-level tank. The reaction vessels, transfer tank, centrifuge, filter, and high-level tank are interconnected. Each reaction vessel has a first overflow hole at the top of its side wall. Each reaction vessel is connected to a calcium carbonate supply device and a formic acid supply device. The concentration system includes an evaporation device, a hot air distributor, and a hot air furnace. The purification system includes an overflow tank and a filter press. Each overflow tank has a second overflow hole at the top of its side wall. Each first overflow hole is connected to the overflow tank via an overflow pipe, and each overflow pipe is equipped with an overflow valve. The second overflow hole is connected to the filter press via a pipeline, and the filter press is connected to the evaporation device. The overflow tank is connected to the transfer tank, and a movable sealing plate is provided at the bottom outlet of the overflow tank. This invention can solve the problems of difficult impurity separation, resource waste, high energy consumption, and poor crystallization quality in traditional preparation processes.

The invention belongs to the field of building materials, and particularly relates to an anhydrous gypsum-based terrazzo floor material and a preparation method thereof. The anhydrite-based terrazzo floor material is prepared from the following raw materials: anhydrite, quenched stone, building gypsum, ash calcium, potassium sulfate, calcium formate, a water reducing agent, a defoaming agent, rubber powder and hydroxypropyl methyl cellulose. The invention relates to a building material, which is prepared from the following raw materials in parts by weight: 525 to 550 parts of anhydrite, 350 to 450 parts of quenched stone, 30 to 40 parts of building gypsum, 15 to 20 parts of ash calcium, 4 to 7 parts of potassium sulfate, 0.5 to 0.8 part of potassium acid calcium, 1.5 to 2.0 parts of water reducing agent, 0.4 to 0.6 part of defoaming agent, 0.10 to 0.15 part of hydroxypropyl methyl cellulose and 6 to 8 parts of rubber powder. The anhydrous gypsum-based terrazzo floor material is high in early strength and low in cost compared with a cement-based inorganic terrazzo in a construction period. The development of companies is facilitated, and the product is more competitive in the market.

The present application relates to the technical field of binder, in particular to a kind of anti-layering light super-flexible rock plate binder and preparation method thereof.The anti-layering light super-flexible rock plate binder includes the following raw materials by weight parts:portland cement 25.0-32.0 parts,sulfoaluminate cement 2.4-3.0 parts,heavy calcium 5.0-8.0 parts,ceramsite sand 35.0-60.0 parts,toughness resin sand 5.0-10.0 parts,dry powder anti-layering wetting additive 1.0-2.0 parts,calcium formate 0.5-1.0 parts,suspension stabilizer 0.2-0.5 parts,fumed silica 0.1-0.4 parts,bonding enhancer 0.5-1.0 parts,powder dispersant 0.08-0.2 parts,cellulose ether 0.34-0.4 parts,redispersible emulsion powder 6.0-10.0 parts,starch ether 0.05-0.1 parts,wood fiber 0.4-0.8 parts.The anti-layering light super-flexible rock plate binder has low bulk density and dry density, in addition, it also has the characteristics of high bonding strength, low elastic modulus and good flexible anti-cracking performance.

The invention discloses a material for improving impervious and self-healing functions of concrete and a preparation method of the material. The material is prepared from 8-10 parts of polypropylene fibers, 30-35 parts of a magnesium expansion material, 30-35 parts of an active low-carbon cementing material, 10-15 parts of a mineral admixture active exciting agent, 3-5 parts of sodium carbonate, 1-2 parts of calcium formate, 3-5 parts of a catalyst and 1-2 parts of a penetration enhancer. The polypropylene fiber is monofilament or reticular modified polypropylene fiber, the length is 6-19mm, and the diameter is 18-48; the active low-carbon cementing material is one or more of granulated blast furnace slag micro powder or I-grade fly ash; the catalyst is an aluminate compound and is used for accelerating the reaction process of active substances, calcium ions and water. The water penetration resistance of the concrete is remarkably improved by exciting the activity of the active low-carbon cementing material in the concrete, pores and cracks in the concrete can be effectively filled, and the self-repairing and healing capacity of the concrete is improved.

The invention relates to the technical field of chemical production, and provides a gypsum-based inorganic cementing material and a preparation method and application thereof.The gypsum-based inorganic cementing material is prepared from, by mass, 30%-50% of anhydrous gypsum, 20%-30% of semi-hydrated gypsum, 5%-10% of quick lime and 5%-30% of aluminum sulfate or alums, and the sum of the mass percentages of all the components is 100%. Calcium formate or calcium nitrate accounts for 5-10%, copperas accounts for 0-10%, and sodium metaaluminate accounts for 0-10%. According to the gypsum-based inorganic cementing material as well as the preparation method and the application thereof provided by the technical scheme, the core technical bottleneck of environmental problems caused by massive stockpiling of industrial byproduct gypsum and poor water resistance of products is effectively solved, and high-added-value resource utilization of the industrial byproduct gypsum is realized.

The invention relates to a method for creating an excavation on a construction site and subsequently backfilling it using the excavated soil obtained during the creation process, containing 1 to 15 wt.% organic matter, wherein the excavated soil is mixed with limestone flour, an activator selected from calcium formate, calcium acetate and / or calcium aluminate, water and a hydraulic binder to obtain a temporarily flowable, self-compacting backfill material (ZFSV), wherein the amount of activator is adjusted to the proportion of organic matter in the excavated soil.

The present invention provides an early strength material comprising calcium formate powder, wherein, in the volume cumulative particle size distribution of the calcium formate powder determined by laser diffraction scattering method, 90% of the particles have a particle size (D90) of less than 1200 μm.

The invention discloses an anti-freezing flexible fire preventing and extinguishing spraying material for the surface of a strip mine coal seam and a preparation method thereof.The anti-freezing flexible fire preventing and extinguishing spraying material for the surface of the strip mine coal seam is prepared from a component A, a component B and a component C. The component A is prepared from, by mass, 16-25% of styrene-acrylic emulsion, 0.2% of 702 antioxidant and the balance water; the component B comprises 4-15% of polyvinyl alcohol, 3-5% of polyacrylamide, 1-3% of magnesium chloride and the balance of water; and the component C comprises 50-60% of Portland cement, 20-25% of fly ash, 10% of calcium formate, 4% of sodium carboxymethyl cellulose and 1% of ammonium polyphosphate. The spraying material disclosed by the invention is good in ductility, the elongation rate exceeds 30%, and the spraying material has a very good sealing and oxygen isolating effect on the open-pit mine step slope exposed coal seam, so that a film with cohesiveness and flexibility is formed.

The invention discloses a preparation method of a rapidly-solidified micro-expansion mining filling material and a continuous filling process, and relates to the technical field of filling materials. The preparation method comprises the following steps: mixing cement, gypsum, an early strength agent, an accelerator, an expanding agent, calcium formate, sodium gluconate and polypropylene fibers to obtain a mixed dry material; mixing the mixed dry material with water to obtain slurry; foam generated by foaming liquid through foaming is introduced into the slurry, and foam concrete slurry is obtained; and molding and curing the foam concrete slurry to obtain the filling material for the rapid-solidification micro-expansion mine. The quick-setting micro-expansion mining filling material prepared by the invention has excellent water resistance and mechanical properties. In addition, due to the filling effect of the foam and the expansion effect of the expanding agent, the prepared rapid-setting micro-expansion mining filling material further has low density, the demand quantity of the filling material during filling can be reduced, and then the filling cost is reduced.

The invention relates to a high-molecular polymer cement coating for roof waterproofing and a preparation method of the high-molecular polymer cement coating, and belongs to the technical field of waterproof coatings. Wherein the polymer emulsion is prepared from the following raw materials in parts by weight: 40 to 55 parts of acrylate emulsion, 2 to 4 parts of carbon black, 5 to 10 parts of 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 8 to 16 parts of modified fiber and 20 to 35 parts of deionized water; the cement paste is prepared from the following raw materials: 60-75 parts of Portland cement, 10-20 parts of quartz powder, 5-12 parts of ground calcium carbonate, 4-8 parts of cellulose ether, 1-3 parts of calcium formate, 2-6 parts of polycarboxylic acid and 30-35 parts of tap water. The high-molecular polymer cement coating has extremely high tensile strength, impact resistance and cracking resistance, the polymer emulsion and the cement paste are mixed to form an interpenetrating network structure, the high-molecular polymer cement coating has flexibility and weather resistance of an organic polymer and strength and durability of inorganic cement, and the mechanical property, durability and construction performance of the high-molecular polymer cement coating are improved.

This invention discloses a calcium formate drying device, a calcium formate production device, and their operating method, belonging to the field of calcium formate production technology. The calcium formate drying device includes a hot air duct and a normal temperature air duct, both equipped with cyclone separators. A screening device is connected to the outlet of the first cyclone separator, and the screening device is connected to the normal temperature air duct. The calcium formate production device includes a reaction system, a transfer tank, a centrifuge, a mother liquor system, a drying system, and a hot air system. The operating method of the calcium formate production device includes feeding calcium carbonate powder and formic acid into each reaction vessel for mixing and reaction; the reacted material is temporarily stored in the transfer tank, then pumped into the centrifuge for solid-liquid separation; the separated solid calcium formate is dried by the drying system; the separated mother liquor, after impurity removal, is partially reused in the reaction vessel, and the remainder is evaporated in an evaporation vessel. This invention features continuous production, thorough impurity removal, and good energy-saving effects.

The invention discloses a method for preparing cement by using modified lithium slag composite multi-source solid waste, and belongs to the technical field of building materials and solid waste resource utilization. The core of the method is that the lithium slag is subjected to'targeted curing-gradient excitation 'modification: firstly, an aluminum salt solution is adopted for pretreatment, and soluble lithium ions are specifically cured to eliminate the hydration inhibition effect of the soluble lithium ions; then co-grinding with calcined magnesium oxide, and adding sodium silicate and calcium sulfate whiskers step by step for gradient excitation; the modified lithium slag, granulated blast furnace slag, fly ash, Portland cement clinker, desulfurized gypsum / phosphogypsum composite gypsum and the like are subjected to synergistic grinding, then a composite exciting agent composed of solid water glass, triisopropanolamine and calcium formate is added, and the cement is prepared through homogenization. According to the invention, the problem of performance degradation under the condition of high doping amount of the lithium slag is fundamentally solved, the prepared cement has the outstanding advantages of normal coagulation, high strength (especially later strength) and small dry shrinkage, and high value-added resource utilization of the multi-source solid waste is realized.

The invention relates to the technical field of road engineering construction, and particularly discloses a ceramic tile adhesive as well as a preparation method and application thereof. The ceramic tile binder comprises sulphoaluminate cement, gypsum, aggregate, rubber powder, a polymer emulsion, an inorganic additive, a waterproof agent, a water reducing agent, a defoaming agent and an air entraining agent, wherein the inorganic additive comprises palygorskite powder, microcrystalline glass powder, calcium formate and calcium nitrite; the polymer emulsion comprises a water-based acrylate emulsion and an ethylene-vinyl acetate copolymer emulsion. The ceramic tile binder has good water resistance, excellent bonding performance and low temperature resistance, the problems that an existing ceramic tile binder is poor in water resistance, low in bonding strength and poor in low temperature resistance are effectively solved, and a new design thought is provided for design of the ceramic tile binder.

The application discloses a kind of concrete for TBM lining in-situ 3D printing and preparation method thereof, belong to civil engineering materials field.It includes by weight parts: 6000 parts cementitious material, 5400-6600 parts quartz sand, 1290-1350 parts water, 0.6-0.9 parts hydroxypropyl methyl cellulose, 24-36 parts polycarboxylic acid water reducing agent, 6-9 parts calcium formate, 12-18 parts xanthan gum, 300-540 parts MgO expanding agent, 75-105 parts polyoxyalkyl alcohol shrinkage reducing agent, 40-80 parts steel fiber, 120-180 parts Fe3O4 nanoparticles.The cementitious material is mixed by Portland cement and sulphoaluminate cement, and the mass ratio is 1:(0.67-1.5).The concrete has low water-binder ratio, excellent extrudability, fast initial setting and high early strength, and can realize continuous, high-strength and integrated in-situ 3D printing construction of TBM tunnel lining.

Provided is a concrete composition containing a binder, a curing accelerator for a hydraulic material, and water, wherein: the binder content is 300 kg / m3 or more; the water-binder ratio is 55% or less; the added amount of the curing accelerator for a hydraulic material is 1-50 kg / m3; and the curing accelerator for a hydraulic material contains 20.0-80.0 mass% of calcium formate, 15.0-70.0 mass% of an inorganic calcium compound, and 0.5-30.0 mass% of an inorganic sulfate excluding calcium sulfate.

The utility model provides an energy-saving hot air circulation device of a calcium formate drying system, which relates to the technical field of calcium formate drying and comprises a first hot air circulation pipe, a hot air purification mechanism and a hot air circulation mechanism, one end of the first hot air circulation pipe is connected with a hot air recovery pipe of the calcium formate drying system, and the hot air purification mechanism comprises a support, an end cover and a purification disc. A purifying box is arranged on the front side in the purifying disc, an end cover is rotationally arranged on the front side of the purifying disc, one end of a first hot air circulating pipe is connected with a first connecting hole, and the output end of a hot air circulating mechanism is connected with a fresh air heating jacketed pipe of a calcium formate drying system; tail gas from the calcium formate drying system enters the hot air purifying mechanism through the first hot air circulating pipe to be purified and dehumidified, and then is pumped into the fresh air heating jacketed pipe of the calcium formate drying system through the hot air circulating mechanism, so that fresh air is preheated by using the purified and dried high-temperature hot air tail gas.

The invention provides a method for preparing calcium-based nano particles by a reversed-phase microemulsion method, an organic calcium salt nano material and application of the organic calcium salt nano material as a nano drug, and belongs to the field of biomedical nano materials. The calcium-based nanoparticles can be formed by reacting calcium dodecyl benzene sulfonate with ammonium salt of corresponding ions or a hydroxyl-containing organic matter aqueous solution; the preparation method of the calcium-based nanoparticles has certain universality, and nano-material drugs including calcium succinate, calcium hypophosphite, calcium gluconate, calcium formate, calcium citrate and the like are successfully synthesized. The synthesis method is simple, mild in reaction condition, environment-friendly, high in repeatability, capable of realizing batch preparation and low in raw material cost. When the calcium salt nano-drug such as calcium succinate enters tumor cells through endocytosis, a large number of ions are brought into the cells, and suddenly excessive ions can cause osmotic pressure and homeostasis imbalance in the cells, activate a pyroptosis pathway of the cells and induce death of immunogenic cells.

The invention discloses a composite anti-seepage repair material and a preparation method thereof, and belongs to the technical field of engineering materials. The coating is composed of a component A, a component B, a component C, a component D and a component E, the component A is a flexible reversible network precursor and comprises furanized hydroxyl-terminated polybutadiene, bismaleimide glycol ester, dimethylaminoethyl methacrylate and a photoinitiator; the component B is a pH-response microcapsule, the shell of the microcapsule is a chitosan / melamine-formaldehyde composite wall, and the core of the microcapsule is gamma-glycidyl ether oxypropyl trimethoxy silane; the component C is an inorganic mineralization source and comprises calcium formate, nano metakaolin and nano SiOsol; the component D is a dynamic load damping filler and comprises chopped aramid fibers and sulfonated graphene nanoplatelets; and the component E comprises triethanolamine and deionized water. The whole system does not contain cement clinker, the dependence of a traditional material on an alkaline environment is eliminated, and the repairing activity can be kept within the pH value range of 3-13.

The application discloses a concrete performance regulator, a preparation method thereof and application thereof. The preparation method of the concrete performance regulator comprises the following steps: uniformly stirring and ultrasonic dispersing PEG, nano-hydrated calcium silicate, nano-aluminate, nano-silicon dioxide, polypropylene short fibers, starch particles, D3O fibers and calcium formate particles to form a suspension; injecting the suspension into a syringe, slowly pushing out the suspension through an injection hole to form liquid drops; then adding the liquid drops into stirred water, stirring and ultrasonic dispersing to form an emulsion, and the emulsion is the concrete performance regulator. The concrete performance regulator can ensure that a concrete mixture keeps good working performance for a long time, and can quickly solidify and harden after pouring, so that the performance of the concrete is improved.

The application relates to the technical field of building materials, and particularly discloses a cement-based rapid-repairing mortar and a preparation method thereof. The mortar is composed of sulphoaluminate cement, graded quartz sand, silica fume, redispersible latex powder, calcium formate, lithium carbonate, a functional composite additive, a water reducing agent, a powder defoaming agent and mixing water. In the application, the nanosheet subjected to hydrophobization treatment is coated on the surface of the microbead, the compatibility of the nanosheet with a polymer modified cement matrix is significantly improved, the nanosheet can be used as a uniformly dispersed rigid stress skeleton, the early strength of the mortar is effectively improved, meanwhile, the core-shell structure of the composite additive can better isolate and lubricate cement and quartz sand particles during stirring, the friction and mechanical engagement between the particles are greatly reduced, the slurry under a low water-cement ratio still has excellent fluidity and uniformity, the stirring energy consumption is reduced, the homogenization time is shortened, and the construction efficiency is improved.

The invention discloses cement slurry for reinforcing and leaking stoppage in a drilled hole and a preparation method of the cement slurry, and relates to the technical field of geological drilling engineering.The cement slurry is prepared from, by weight, 60-70 parts of sulphoaluminate cement, 20-30 parts of Portland cement, 3.5-5.5 parts of a composite early strength agent, 2-4 parts of an anti-freezing and anti-leakage agent and 0.3-0.5 part of a polycarboxylate superplasticizer. 0.1 to 0.2 part of polyacrylamide, and 18 to 22 parts of water; the composite early strength agent is a mixture of chlorine salt and calcium formate; the anti-freezing and anti-leakage agent is a mixture of glycerol and nano silica fume. The cement slurry has a very good leakage-proof plugging effect, solves the problem of slurry loss during leakage, is controllable in solidification time, low in maintenance energy consumption, free of external heating and complex heat preservation, controllable in heat release, and capable of avoiding local overheating cracking, avoiding the risk of slurry freezing in a low-temperature environment, and ensuring normal hydration.

This utility model provides a filtration and evaporation device for producing calcium formate, relating to the field of calcium formate production. It includes a filter chamber, an evaporation chamber, a mounting base, and a support frame. The filter chamber is located above the evaporation chamber, with the mounting base between them. The support frame is located at the bottom of the evaporation chamber. A first motor chamber is located inside the filter chamber, with discharge ports on both sides. The filter chamber communicates with the evaporation chamber through these discharge ports. A lifting assembly is located above the first motor chamber, and a filter assembly is located above the lifting assembly. A rotating shaft is located inside the evaporation chamber, driven by a first motor inside the first motor chamber. This utility model uses the first motor to drive the rotating shaft, which in turn drives the upper and lower anti-sticking wall components to rotate, thus cleaning the inner wall of the evaporation chamber.

The utility model provides a quick filtering structure of a calcium formate crystal separation device, which relates to the technical field of calcium formate production, and comprises a barrel body, a feed pipe, a liquid outlet pipe, a discharge pipe, a top cover, a collection hopper and a filter cartridge, a scraping mechanism matched with the filter cartridge is arranged in the barrel body, the top cover is fixedly arranged at the top of the barrel body, and the collection hopper is arranged on the top of the barrel body. A rotating mechanism matched with the scraping mechanism is arranged at the top of the top cover; the output end of the motor can drive the rotating shaft to rotate on the inner side of the barrel body, the rotating shaft can drive the scraping plates to rotate on the inner side of the filter barrel, one side of each scraping plate is attached to the inner wall of the filter barrel, and the rotating range of the scraping plates covers the whole filter barrel so as to clean crystals on the inner side of the whole filter barrel. The length of the telescopic rod can be adjusted according to the actual size of the filter cartridge, the adjusting nut on the outer side of the telescopic rod can be screwed down, the adjusting nut extrudes the spring to the limit position, and the scraper plate is tightly jacked in the filter cartridge through elastic force generated by the spring.

The invention discloses an expressway roadbed filler, a preparation method and a construction process thereof, and belongs to the technical field of road engineering materials. Industrial solid waste ardealite and phosphate tailings are used as main raw materials of the roadbed filler, the mass ratio of the ardealite to the phosphate tailings is 3: 2-4: 1, fly ash and blast furnace slag are doped as curing agents, the mass ratio of the fly ash to the blast furnace slag is 7: 3-8: 2, and the total doping amount is 8%-10%. The exciting agent is calcium formate, a water glass solution or a sulfonate solution, and the doping amount is 0.5%-1.5%; admixtures such as hydroxyl or carboxyl long-molecular-chain polymers rich in double bonds, polysaccharides, nano-scale water-soluble fibers, water-retaining agents, flocculants, coupling agents and nano-silicon dioxide composite particles can be added according to performance requirements. According to the invention, industrial solid wastes are fully utilized, and the prepared roadbed filler has good compaction performance, high CBR value and excellent anti-scouring and anti-cracking performance, meets the technical requirements of highway roadbed fillers, and has both environmental protection and economic benefits.