192 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 relates to the technical field of building materials, and discloses cement containing sulfonic acid cellulose and a preparation method thereof.The preparation method includes the steps that gypsum, coal gangue and Portland cement clinker are smashed and added into a concrete mixer to be stirred, then sulfonic acid cellulose, kieselguhr, calcium formate and quaternary ammonium salt modified polyurethane are added into the concrete mixer to be stirred, and the cement containing sulfonic acid cellulose is obtained; the cement containing the sulfonic acid cellulose is obtained. The cement containing sulfonic acid cellulose provided by the invention has better crack resistance, durability and good mechanical properties.

The invention discloses a sulfate and chloride ion erosion resistant offshore wind power tower high-strength grouting material and a preparation method thereof. The grouting material comprises Portland cement, fine aggregate, ricinoleic acid modified nano zinc oxide, an anion erosion resistant agent, an expansion component, composite fibers and an additive. Wherein the anti-anion erosion agent comprises mineral powder, barium salt, lithium silicate, a calcium formate early strength agent and silica fume; the preparation method comprises the following steps: firstly, mixing and stirring the cement, the expansion component and the fine aggregate to obtain powder A; mixing and stirring ricinoleic acid modified nano zinc oxide, an anti-anion erosion agent and an additive to obtain powder B; mixing and stirring the powder A and the powder B, adjusting the water-cement ratio, adding the composite fiber, and stirring. The grouting material is good in fluidity, high in strength and excellent in fatigue resistance, can effectively prevent permeation of sulfate and chloride ions, and has high durability.

The invention discloses a quick-setting high-strength expansive type leakage crack plugging material and method and application, and belongs to the technical field of cement-based material admixtures, the quick-setting high-strength expansive type leakage crack plugging material is prepared by adopting a mixing method, and the quick-setting high-strength expansive type leakage crack plugging material comprises a base material formed by compounding cement, desulfurized gypsum, calcium oxide, alkaline aluminum oxide, calcium formate, hydrated calcium silicate, carboxyl cellulose and a solid polycarboxylate superplasticizer; the active component is formed by compounding polyaluminum sulfate, magnesium sulfate, disodium ethylene diamine tetraacetate, borax and a defoaming agent; the superfine fly ash, the superfine silicon dioxide, the superfine hydroxyapatite, the superfine zinc sulfate, the nano titanium dioxide and the superfine boron nitride are compounded to form a structure regulating functional component. The three components are uniformly stirred by adding water, and then are mixed with an exciting agent to be used for plugging leakage cracks and filling gaps. The leakage plugging material provided by the invention has the advantages of scientific and reasonable composition, simple preparation and application methods, rapid curing, high strength, good durability, micro-expansion and the like, and has good plugging and filling effects on water bursting, water permeation and gas.

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 discloses a high-performance cement-based micro-expansion filling grouting material and a preparation method thereof, and belongs to the technical field of inorganic cementing materials. The high-performance cement-based micro-expansion filling grouting material is prepared from Portland cement, fly ash, graded aggregate, aluminum silicate coated aluminum powder, calcium silicate coated magnesium oxide, tung oil coated iron powder, a calcium formate early strength agent, polycarboxylate superplasticizer powder and water. According to the obtained high-performance cement-based micro-expansion filling grouting material, the fluidity ranges from 432 mm to 441 mm, the 28-day compressive strength ranges from 63.5 MPa to 65.2 MPa, the 28-day breaking strength ranges from 14.3 MPa to 15.1 MPa, the 28-day shrinkage rate ranges from 0.01% to 0.04%, and the 10-time freezing and thawing expansion rate ranges from 0.03% to 0.06%.

The invention relates to the field of safety monitoring, and particularly discloses a calcium formate production process safety monitoring method and system, which utilize a distributed control system to collect original production data, and ensure time consistency of all monitoring variables through data synchronization processing, thereby laying a foundation for subsequent analysis. Thirdly, performing feature engineering processing on the synchronized data, extracting features such as short-term and medium-term change rates, moving average values and standard deviations of temperature, pressure and stirrer current, constructing state features of the reaction kettle, and capturing dynamic operation information of the system; in order to predict potential risks, a trend prediction model based on deep learning is adopted, a historical temperature sequence is converted into a future temperature trajectory, and prospective pre-judgment on the temperature trend is provided; meanwhile, the current system health condition is evaluated in combination with a state recognition model, the risk level is determined through a decision tree model according to the abnormal score and the predicted temperature maximum value, and graded early warning is achieved.

A method of preparation of a foamed concrete, comprising the steps of; providing a cementitious slurry, comprising in wt% relative to the wt of the slurry, 60-70% of a cementitious material, 0.5-5% in

The invention discloses a water-rich stratum cable tunnel synchronous grouting material and a preparation method thereof, and relates to the technical field of tunnel construction materials. The synchronous grouting material comprises the following components: 60 to 90 parts of ordinary Portland cement, 40 to 60 parts of machine-made sand, 10 to 20 parts of fly ash, 40 to 55 parts of mineral powder, 5 to 12 parts of modified nano calcium carbonate, 0.1 to 1 part of hydroxypropyl methyl cellulose, 2 to 5 parts of bentonite, 6 to 12 parts of polyethylene fiber, 2 to 5 parts of triethanolamine, 0.5 to 3 parts of calcium formate and 100 to 150 parts of water. The early strength of the prepared synchronous grouting material develops quickly, and a supporting structure can be formed quickly; good anti-permeability and anti-scouring performance are achieved, and underground water leakage and scouring are effectively prevented; the material has high later strength and good toughness, and can keep structural stability for a long time; meanwhile, excellent crack resistance and durability are achieved, and long-term safe and reliable operation of a tunnel structure is guaranteed.

The invention discloses a metal degreasing agent and a preparation method thereof, and belongs to the technical field of degreasing. Comprising lipase, protease, short-chain fatty acid methyl ester ethoxylate sodium sulfonate, cocamidopropyl betaine, alkyl glucoside, sodium silicate, sodium metasilicate, sodium citrate, disodium ethylene diamine tetraacetate, calcium formate, polyvinyl alcohol-sodium alginate microcapsules, a polyoxyethylene polyoxypropylene block copolymer, sodium carboxymethyl cellulose and water. And the polyvinyl alcohol-sodium alginate microcapsule exists in the metal degreasing agent as a carrier of the lipase and the protease. According to the metal degreasing agent, a microcapsule protection structure is used in the metal degreasing agent, the two technical problems of enzyme-surfactant compatibility and enzyme-alkaline environment compatibility which are difficult to solve for a long time in an industrial degreasing agent are solved, the degreasing agent is easy to actually operate, special equipment is not needed, a traditional degreasing agent can be directly replaced, and the metal degreasing agent is suitable for industrial application. Good market application prospects are realized.

The invention belongs to the technical field of building materials, and particularly relates to a microorganism mineralization modified recycled aggregate as well as a preparation method and application thereof. The preparation method of the microorganism mineralization modified recycled aggregate provided by the invention comprises the following steps: mixing a bacterium solution of microorganisms with nitrification and denitrification capabilities with a bacterium solution of urealytic bacteria for the first time to obtain a mixed bacterium solution; the isoconcentration bacterial liquid volume ratio of the microorganisms with nitrification and denitrification capabilities to the urealysis bacteria in the mixed bacterial liquid is (2: 1)-(1: 4); mixing the mixed bacterial liquid, the recycled aggregate and a mineralizing liquid for a second time, and then performing biological mineralization to obtain the microorganism mineralized modified recycled aggregate; the mineralization liquid comprises urea and calcium formate. The recycled aggregate is subjected to microbial mineralization under the combined action of microorganisms with nitrification and denitrification capacities and urealysis bacteria in a specific proportion, a calcium carbonate protection layer can be generated, the strength of the recycled aggregate is improved, the generated ammonia gas is less, and large-scale application is facilitated.

The invention discloses an additive for improving the compactness of concrete. Comprising the following components in parts by weight: 30-50 parts of a water reducing agent, 10-20 parts of an anti-permeability agent, 1-2 parts of an air entraining agent, 3-5 parts of a defoaming agent, 3-6 parts of a thickening agent and 3-5 parts of a dispersing agent. When the admixture is used for concrete, the compactness of the concrete is greatly improved, so that the compressive strength, the impermeability and the impact toughness of the concrete are improved. The combined use of polyethylene glycol-polyamino acid polymer and unsaturated amino polyoxyethylene ether in the admixture component improves the compressive strength of concrete, the combined use of sulfonated graphene and calcium formate improves the anti-permeability grade of concrete, and the combined use of alpha-olefin sodium sulfonate and allyl fatty alcohol polyoxyethylene ether improves the anti-permeability grade of concrete. The impact resistance of the concrete is improved.

The invention provides bridge concrete for extremely cold areas. The bridge concrete is prepared from the following raw materials in parts by weight: 320 to 400 parts of P.O 42.5-grade Portland cement, 9 to 16 parts of a composite anti-freezing agent, 12 to 22 parts of surface modified nano silicon dioxide, 85 to 130 parts of a mineral composite admixture, 950 to 1250 parts of aggregate, 0.7 to 1.6 parts of a polycarboxylic acid type air entraining agent and 1.8 to 5.5 parts of polypropylene fiber, wherein the composite anti-freezing agent is formed by compounding calcium nitrate, calcium formate and triethanolamine according to the ratio of (3.2-5.1): (1.9-4.2): 1, and the effective content of Ca (NO3) 2.4 H2O in the calcium nitrate is greater than or equal to 96%. Compared with the prior art, the composite anti-freezing agent has the following beneficial effects that the calcium nitrate provides early-stage anti-freezing, the calcium formate accelerates low-temperature hydration, and the triethanolamine serves as a dispersing agent to improve the synergistic efficiency of all the components.

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 discloses a cement mortar reinforcing agent and a preparation method thereof, relates to the field of cement mortar reinforcing agents, and is characterized in that the limit ranges of the DEAIPA dosage (15-20 parts), the titanate coupling agent hydrolysis time (3-5 hours) and the main mixing reaction temperature (60-70 DEG C) are controlled. A titanate coupling agent is hydrolyzed at specific pH and temperature until the conversion rate of-SiOR groups is high, sodium polyacrylate adsorbs sodium bicarbonate to form CO2-loaded microspheres, then the CO2-loaded microspheres are mixed and reacted with raw materials such as calcium formate and DEAIPA at limited temperature, and finally the reinforcing agent is prepared. Ten groups of contrast experiments are designed for verification: 1-5 groups are conventional groups with parameters within a limited range, 6-9 groups are control groups with parameters exceeding the range, and 10 groups are traditional raw material blank groups. Experiments show that the 3-day / 28-day compressive strength and the total shrinkage rate of a conventional group are remarkably superior to those of an out-of-range group and a blank group, a nonlinear relation exists in the synergistic effect of parameters, and it is proved that the limited range has practical significance for improving the mechanical property and the crack resistance of the low-clinker cement.

The invention relates to solid waste based self-leveling mortar, which is prepared from the following ingredients in parts by weight: 197 to 217 parts of granulated blast furnace slag powder, 151 to 171 parts of steel slag powder, 105 to 125 parts of industrial byproduct gypsum powder, 390 to 410 parts of iron tailing sand, 90 to 110 parts of steel slag sand, 10 to 30 parts of aluminate cement, 1.5 to 3.5 parts of high-performance water reducing agents, 10 to 30 parts of rubber powder, 1.5 to 3.5 parts of calcium formate, 1.5 to 3.5 parts of defoaming agents and 0.2 to 0.4 part of cellulose. Industrial solid waste materials are completely used as raw materials, industrial solid waste is fully utilized, energy is saved, the environment is protected, and the production cost is low. The coating has good fluidity, is uniformly spread, and can well flow into gaps of the floor heating pipeline. And the hardened self-leveling mortar is uniformly distributed and has good segregation resistance.

The invention discloses a compound feed for weaned piglets and a preparation method thereof, relates to the technical field of feeds, and solves the problems of high stress, low food consumption, slow weight gain, intestinal damage, high diarrhea rate and low survival rate of weaned piglets. Each ton of compound feed for weaned piglets comprises the following raw materials: corn, broken rice, soybean meal, super steam fish meal, extruded soybeans, fermented soybean meal, peanut meal, flour, whey powder, glucose, white sugar, soybean oil, linseed oil, coconut oil, calcium formate, calcium hydrophosphate, amino acid, a vitamin additive, a trace element premix, composite dietary fibers, auxiliary materials and the like. The feed additive can improve the feed intake of piglets, protect the intestinal health of the piglets, enhance the immunity, relieve the weaning stress of the piglets, reduce the incidence rate of diarrhea and disease of the piglets and improve the weight gain rate of the piglets.

The invention discloses a method for preparing flow-state solidified soil by utilizing high-liquid-limit mucky shield muck, which comprises the following steps: firstly, preparing a composite curing agent by adjusting the formula proportion of industrial byproducts including carbide slag, slag, fly ash and phosphogypsum as well as calcium formate and sodium hexametaphosphate; secondly, the shield muck is pretreated, and pretreated slurry meeting the requirement is obtained; and finally, a composite curing agent is added into the pretreated slurry, the water content of the mixed slurry is controlled to be 130-160%, all components in the composite curing agent and the pretreated slurry are subjected to full contact reaction through stirring, and therefore the fluid-state solidified soil meeting the backfilling requirement is obtained. Calcium formate and sodium hexametaphosphate are introduced into a traditional industrial by-product curing agent formula, the rheological property of the slurry is dynamically regulated and controlled, and harmless treatment and resource utilization of the waste resource high-liquid-limit mucky shield muck are achieved.

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 relates to the technical field of solid waste resource recycling, in particular to a curing agent for waste soil treatment and a preparation method and application thereof. The curing agent for waste soil treatment is prepared from the following raw materials in parts by weight: 30 to 40 parts of carboxyl-terminated hyperbranched polyester, 2 to 4 parts of calcium formate, 25 to 35 parts of polyacrylamide, 7 to 13 parts of hydroxypropyl methyl cellulose, 2 to 4 parts of calcium stearate, 8 to 12 parts of potassium carbonate, 2 to 6 parts of sodium hydroxide, 3 to 5 parts of organic silicon defoaming agent and 8 to 12 parts of organic bentonite. The method has the advantage that the solidification effect of the waste soil with high water content is improved.

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.

To provide a high-early-strength material that can improve fluidity retention, setting property and finish property.SOLUTION: The high-early-strength material contains calcium formate-based powder having a particle diameter at cumulative 90% (D90) of 1,200 μm or less in a volume cumulative particle size distribution measured by a laser diffraction scattering method.SELECTED DRAWING: None

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 present invention provides a production method for recycling carbide slag to produce neopentyl glycol and calcium formate. The method uses carbide slag slurry containing calcium hydroxide solution, which is made from carbide slag produced by the acetylene method for producing PVC, as a catalyst and adds it to the condensation reaction for preparing neopentyl glycol using isobutyraldehyde and formaldehyde as raw materials. The present invention uses a large amount of solid waste carbide slag containing calcium hydroxide produced by the acetylene method for producing PVC as a catalyst for the disproportionation method, solving the problem of difficult utilization of carbide slag. At the same time, it solves the problem that when directly adding calcium hydroxide solution as a catalyst, calcium formate wall sticking is likely to occur. The solid formed by calcium formate wall sticking has the characteristics of strong adhesion and compactness, which is difficult to clean. The cleaning cost is high and it is easy to cause equipment blockage and shutdown. In severe cases, the equipment cannot be cleaned and is abandoned. In addition, by adding a crystal form finishing agent to the condensation reaction solution, the crystallization mode of calcium formate and the size of crystallization particles can be changed, improving the purity and quality of calcium formate and neopentyl glycol.

The invention relates to the technical field of building screeding strips, in particular to a preparation method of a mortar screeding strip, the performance and forming quality of the screeding strip are remarkably improved by scientifically optimizing a mortar formula and combining a systematic preparation process, and a composite cementing material combination is adopted in the formula and comprises PO 52.5 cement and aluminate cement, the early strength and final strength are guaranteed through synergistic hydration reaction, the problems that traditional mortar is long in maintenance period and slow in strength increase are solved, meanwhile, sodium carbonate, calcium formate and other functional admixtures are added, the mortar setting time and early strength development are effectively regulated and controlled, ribs can have the demolding strength within 2 hours, corner collapse and deformation are avoided after demolding, and the quality of the ribs is improved. The production efficiency and operation safety are improved, PP fibers and wood fibers are adopted for double toughening, the crack resistance and toughness of ribs are improved, and the impact resistance and edge stability of mortar are remarkably improved.

The invention relates to the field and particularly discloses multifunctional marble dry-mixed mortar which is characterized by comprising cement, marble, an expanding agent, a water reducing agent, rubber powder, a water repellent, a stabilizer, calcium formate, a defoaming agent and fibers. The dry-mixed mortar has the advantages that the marble is adopted to replace sand to serve as aggregate and is reasonably matched with the cement, the rubber powder, the fibers, the calcium formate, the expanding agent, the water repellent and the like, the obtained dry-mixed mortar keeps a stable structure in a low-temperature environment, and the service life is prolonged; high flexibility and tensile strength are achieved, and cracks can be reduced; the marble adopts continuous grading and is matched with the water repellent, the stabilizer and the like, so that gaps in the mortar can be effectively filled, a compact waterproof structure is formed, moisture permeation is prevented, and the mortar has better applicability in a humid environment or a part with a waterproof requirement.