120results about How to "Prolong initial setting time" patented technology

The invention provides a cement-based composite material used for a 3D printing technology as well as a preparation method and application thereof. The cement-based composite material is prepared from the following raw materials based on the total weight of the composite material: 33%-40% of cement, 0%-8% of inorganic powder, 32%-38% of tailing machine-made sand, 2.5%-3% of a high-molecular polymer, 0.1%-0.5% of a water reducing agent and 16.7%-20% of mixing water; a composite thickening time control agent, a thixotropic agent, a volume stabilizer and the like are added into a mixture to prepare an inorganic composite material; and then the inorganic composite material can be directly pumped into a 3D printer for building to be applied to construction. The cement-based composite material is an inorganic material and the materials are easily available; a lot of industrial waste materials can be used; therefore, the cement-based composite material is low in cost, energy-saving and environment-friendly; the condensation time can be flexibly controlled, and the material has super early strength, good caking property and strong stability; the requirements of 3D printing construction continuity of the building and the building strength are met so that the house building has good global stability and use safety; and the application and popularization of 3D printing technology can be greatly promoted.

The invention discloses a curing agent for filling iron tailings and a preparation method thereof and belongs to the technical field of mine safety. The curing agent comprise the following components in parts by mass: 0-70 parts of fly ash, 10-80 parts of superfine mineral slag powder, 0-70 parts of superfine steel slag powder, 0-20 parts of an alkaline activator, 0-20 parts of an sulfate activator, 0.1-1 part of a foam stabilizer and 2-5 parts of a microcapsule in which aluminum powder is used as a core material. The preparation method of the curing agent comprises the steps of firstly weighting fly ash, superfine mineral slag powder, superfine steel slag powder, alkaline activator, sulfate activator and foam stabilizer according to the blending ratio of the components of the curing agent, adding all the components in a stirrer, quickly stirring for 5-15 minutes, adding microcapsule in which aluminum powder is used as a core material and slowly stirring for 2-5 minutes to obtain the curing agent for filling iron tailings. The curing agent for filling iron tailings provided by the invention has strong curing capability and is simple and controllable in use and operation.

The invention discloses a phosphogypsum-base wall material for a cast-in-place wall. The invention is characterized in that the material is prepared from the following raw materials in percentage by weight: 60-80% of beta-phosphogypsum, 10-20% of mineral admixture, 5-25% of cement, 0.25-0.5% of retarder, 0.05-0.15% of defoaming agent, 0.05-0.2% of thickener and 0.5-1% of water reducer. The raw materials are uniformly mixed to obtain the phosphogypsum-base cast-in-place wall material; and the material and water are mixed uniformly in a water/material ratio of 0.4-0.5 to obtain a slurry, and the slurry is cast in place and molded. The phosphogypsum-base wall material has the advantages of controllable setting time, low flowing loss rate, high utilization ratio of solid waste, low material cost and high strength, is convenient for construction, and can be widely used for frame-structure infilled internal walls of commercial and civil buildings.

The invention discloses a shield synchronous grouting construction material including, by weight, 200-300 parts of composite Portland cement, 400-600 parts of fly ash, 50-80 parts of 200-mesh calcium based bentonite, 1200-1300 parts of grading river sand, 0.4-0.6 parts of hydroxypropylmethyl cellulose, 0.5-3 parts of a water reducer, 0.3-1 part of a retarder, 1-3 parts of an early strength agent and 16-24 parts of a volume stabilizing agent. Through reasonable adjustment of composition and content of the components, the compressive strength, bleeding ratio, setting time and flowability of the construction material are controlled, so that the construction material has long initial setting time, is quick in early strength development, is not liable to dissociation, has good volume stability, can effectively fill in gaps in buildings and prevent floatation and deformation of tunnel segments, has good flowability and anti-dispersing property, and is easy to transport and to store for a long period.

The invention discloses a novel phosphorus and magnesium based cement grouting material and a preparation method and belongs to the field of technical application of grouting materials. The grouting material is prepared from the following raw materials in parts by weight: a component A: 30 to 90 parts of a compound magnesium compound, 0.5 to 5 parts of a compound retarder, 0.2 to 0.7 part of a water reducer, 0.2 to 1.5 parts of an acid-alkali buffering agent, 1 to 5 parts of a compound stabilizer and 0.5 to 1.5 parts of a compound surfactant; a component B: 20 to 50 parts of phosphate and 0.2to 2 parts of a de-foaming agent. The preparation method comprises the following steps: accurately weighing materials of the component A and the component B according to the ratio and uniformly stirring; mixing with water according to the weight ratio of 100 to (20 to 50) and stirring to form slurry; after uniformly mixing, pressing a mixture into gaps or cracks and curing. The novel phosphorus and magnesium based cement grouting material disclosed by the invention has the beneficial effects of controllable coagulation time, large adjustable range, high early age strength, high bonding strength, good permeability, simplicity and convenience for construction, greenness and environment protection and low cost, and meets the requirements on three properties including injectability, controllability and permeability resistance.

The invention, belonging to the field of ornaments, relates to a method for producing a gypsum relief product, comprising the following steps: (1) preparing slurry, (2) making a die, (3) grouting, and (4) surface protection of the product. The step of preparing slurry comprises the following steps: 1, material preparation: high strength gesso a, redispersible polymer powder b, peach gum c, sodium tetraborate d, chopped fiber e, and water f; 2, preparation method: mixing f, b, c, d, and e with the weight ratio of f to b to c to d to e of 1000 to (40-50) to (3-5) to (2-3) to (15:20) to obtain a mixed emulsion g, and mixing a with g with the weight ratio of a to g of 1 to 1 to obtain slurry h. The gypsum relief product disclosed herein has the advantages of high surface hardness, scratch resistance, good toughness, impact resistance, strong weatherability, water resistance, and light weight.

The anticracking high strength ecological cement is produced with Portland clinker 35-80 wt%, fly ash 5-30 wt%, ferroalloy slag 1.0-30 wt%, boiler slag 5-40 wt%, gangue 10-40 wt%, grinding aid 0.1-2.0 wt%, gypsum 0.5-10 wt%, reinforcing fibrous inorganic mineral material 1-20 wt% and polymer fiber 0.01-10 wt%, and through grinding and mixing. Compared with available technology, the anticracking high strength ecological cement of the present invention has the advantages of low hydration heat, low shrinkage, low water demand, high early strength, etc.

The invention belongs to the technical field of concrete preparation, and provides a sulfate-resistant concrete. The sulfate-resistant concrete is characterized by being prepared from, by weight, 60-70 parts of sulfate-resistant cement, 30-40 parts of mineral admixture, 50-90 parts washed sand, 40-80 parts of machine-made sand, 110-160 parts of coarse aggregate, 4-6 parts of polypropylene fiber, 2-3 parts of carboxymethylcellulose, 70-90 parts of slurry forming water, 0.5-0.8 part of anhydrous ethanol, 2-3 parts of SBT-RMA concrete corrosion inhibitor and 1-2 parts of additive. The sulfate-resistant concrete solves the problems that the damage of corrosion to reinforced concrete is very serious, and sulfate-resistant concrete in the market is poor in anti-corrosion performance and short inservice life.

The invention discloses a magnesium phosphate cement road rapid repair material which is prepared by compounding a phosphate-based powder material A, a magnesium oxide-based powder material B and a polymer emulsion C in proportion. By adopting a composite retarding technology, the operable time is effectively prolonged; the phosphorus slag powder is used as a mineral admixture, so that the hydration degree of the magnesium phosphate cement can be promoted while retarding; the multifunctional composite polymer emulsion is adopted, so that the toughness of the magnesium phosphate cement is improved while the waterproofness of the magnesium phosphate cement is improved; the obtained improved magnesium phosphate cement can show excellent operability, usability and stability, and the related preparation method is simple, low in cost and suitable for popularization and application.

The invention relates to the technical field of geothermal equipment, in particular to a well cementation material for a medium and deep layer geothermal well, a preparation method of the well cementation material, and the geothermal well. The well cementation material for the medium and deep layer geothermal well is prepared from water, cement, graphite powder, metal powder, a water reduction agent and a retarder which are in appropriate proportion. The well cementation material has good strength, thus the well cementation need can be met, meanwhile, the retarder is added in the well cementation material, thus the initial setting time of the well cementation material can be prolonged, and the construction requirements are met; flowability of the well cementation material can be optimizedthrough the water reduction agent, and thus liquidity is improved; and the strength, liquidity and initial setting time of the well cementation material meet the construction requirements, meanwhile,the heat conductivity coefficient of the well cementation material is 5-20 times that of the cement, and thus the utilization efficiency of geothermal energy can be effectively improved.

The invention relates to synchronous grouting slurry for shield driving construction of a water-enriched sandy gravel stratum, which is used for synchronously grouting the stratum by using an earth pressure balance shield for the water-enriched sandy gravel stratum. The grouting slurry is prepared from the following components in percentage by weight: 8-8.8% of cement, 42-43% of river sands, 0.1-0.2% of polycarboxylate high performance water reducer, 4.5-4.7% of bentonite, 1.4-1.6% of yellow clay powder, 23-24% of coal ash and 19-20% of water. According to the slurry provided by the invention, by adding the polycarboxylate high performance water reducer, the use level of water in the equal flow condition is reduced, the use level of cement can be reduced under same strength by virtue of double effects of hydrophilicity and hydrophobicity of the polycarboxylate high performance water reducer, so that the initial setting time of the slurry is accelerated and the problem that the synchronous grouting slurry is separated within a short time is solved. The peaceability, the mobility and the set strength of the synchronous grouting slurry can be improved.

The invention relates to super-retarded concrete, which is characterized by comprising the following raw materials (by weight): 320-330 parts of cement, 60-70 parts of mineral powder, 40-50 parts of fly ash, 710-730 parts of sand, 1050-1100 parts of broken stone, 165-175 parts of water and 8.1-9 parts of an additive. The super-retarded concrete has long setting time and enough later strength.

The invention discloses a silicate plugging agent for oil-well water plugging and an application method thereof, wherein the silicate plugging agent comprises the following components by weight percentage: 8-12% of general purpose portland cement, 1-3% of silica fume, 0.3-0.7% of water glass, 0.01-0.03% of sodium lignin sulfonate and the balance of water. The application method of the silicate plugging agent for oil-well water plugging comprises the following steps: in the stirring process, orderly adding the water glass, the sodium lignin sulfonate and the silica fume in a stirring pot with water proportionally, and stirring evenly to obtain a mixed solution; next, adding the general purpose portland cement to the mixed solution while stirring to form the base solution of the silicate plugging agent; and pouring the base solution of the silicate plugging agent into formation fractures. The silicate plugging agent provided by the invention has the advantages of high water cement ratio, good pumping performance, long initial setting time, high after-final-setting strength, good water scouring resistance, all of which are similar to the own physical properties of the formation; the silicate plugging agent is capable of achieving the construction requirements of oil-well water plugging; and the properties of the silicate plugging agent are suitable for nonhomogeneous fractured reservoirs.

The invention discloses a rapid preparation method for an arc-sprayed female die matrix. The female die matrix belongs to a magnesium oxychloride composite material, and contains 41.2 to 57.7 percent of light burned magnesia, 15.9 to 36.1 percent of industrial magnesium chloride, less than or equal to 2.0 percent of chopped carbon fiber, and the balance being water. During the use, raw materials are prepared into an uniform sizing agent, a prototype of a part to be sprayed is used to reclaim a female die made of magnesium oxychloride composite material, the female die is dried and finely machined, and finally hydrochloric acid is used to perform surface treatment on the female die to finish the rapid preparation of the sprayed female die. The sprayed female die produced by the method has low cost and high strength, is high temperature resistant, does not need high temperature baking during the production, can be machined, and is particularly suitable for middle-low melting point and high melting point electric arc spraying rapid molding technologies.

The invention discloses a road surface paving plate with a waterproof surface layer and a permeable base layer, and a production technology thereof. The road surface paving plate comprises a surface layer and a base layer, wherein the surface layer contains the following raw materials in parts by weight: 14-28 parts of water, 20-30 parts of cement, 10-15 parts of slag, 6-8 parts of coarse whiting,0-2 parts of metakaolin, 32-42 parts of fine sand, 1-2 parts of poval, 0.1-0.2 parts of tartaric acid, 0.01-0.02 parts of tri-isopropanolamine, 1-1.5 parts of pure acrylic emulsion, 0.05-0.1 parts ofcellulose ether, 1-1.5 parts of emulsion powder, 0.3-0.5 parts of first additive, 6-8 parts of water, 16-18 parts of cement, 4-6 parts of coal ash, 41-47 parts of macadam, 16-21 parts of coarse sand,0.05-0.1 parts of xanthan gum, and 0.2-0.4 parts of second additive. The road surface paving plate has the advantages of being excellent in waterproofness of the surface layer and permeability of thebase layer, and beneficial to smooth drainage after the road surface paving plate is arranged.

An efficient setting retarder for concrete and cement is proportionally prepared from Ca(OH)2, CaCO3, CaSO3.0.5H2O, CaSO4.2H2O, SiO2, acid-insoluble substance and Cl ions, through storage, homogenizing and modifying. It has low cost.

The invention discloses a high-temperature-resistant non-shrink early-strength grouting material and application thereof, and relates to the technical field of grouting materials. The high-temperature-resistant non-shrink early-strength grouting material comprises volcanic ash silicate cement 32.5R, perovskite flotation tailing, illite powder, shell powder, shale pottery sand, Swf-05 gelatin powder, water reducing agents, water repellents, expansive agents, rare-earth coupling agents and magnetized water. The high-temperature-resistant non-shrink early-strength grouting material and the application have the advantage that the high-temperature-resistant non-shrink early-strength grouting material is comprehensively obviously enhanced in the aspects of the physical properties, the frost resistance, the high-temperature resistance, the flowability, the mechanical strength and the like, is obviously progressed as compared with the prior art, and is good in applicability and long in servicelife.

The invention discloses a ready mixed dry mortar and a preparation method thereof. The ready mixed dry mortar is prepared by the following components in percentage by weight: 18-50% of cement, 48-80% of medium fine sand and 0.1-2% of cellulose ether high molecular polymer. The preparation method comprises the following steps of: A, drying the medium fine sand, screening to remove particles of more than 4.75mm and weighing for use; B, weighing the cellulose ether high molecular polymer and the cement, and uniformly stirring in advance for use; and C, adding the medium fine sand screened in the step A and the mixture of the cellulose ether high molecular polymer and the cement in the step B to a stirrer for uniformly stirring to obtain the product. The aim of the invention is to overcome the defects in the prior art and provide a high-quality ready mixed dry mortar containing high molecular polymer component. The other aim of the invention is to provide a method for preparing the ready mixed dry mortar.

The invention discloses environment-friendly cement and a preparation method thereof. The environment-friendly cement is prepared from limestone, coal ash, fluorgypsum, kaolin, industrial waste residues, modified natural rubber, coal gangue, vanadium slag, a reinforcing agent, an anti-permeability agent and water, and the modified natural rubber, the limestone and the coal ash are added into the prepared cement for effective filling; the strength and durability of cement are improved, in addition, the kaolin can change the grain composition of the cement, improve the coarse grain content of the cement, enhance the skeleton effect and further improve the strength and durability of the cement, so that the cement has a wide application prospect, and meanwhile, the reinforcing agent is added in the cement preparation process; the reinforcing agent reduces the viscosity of the cement material and promotes the dispersion of the particles by adjusting the fluidity of the cement material and the surface electrical properties of the particles, so that the flowability of the cement material is improved, the initial setting time in the cement preparation process is remarkably prolonged, and the later compressive/flexural strength is also remarkably improved.

The invention belongs to the technical field of building materials, and provides gypsum-based foam concrete and a preparation method of the gypsum-based foam concrete. The concrete comprises the following components in parts by weight: 50-65 parts of gypsum, 22-28 parts of Portland cement, 1-2 parts of sulphoaluminate cement, 1-2 parts of quick lime and/or slaked lime, 13-18 parts of fly ash, 4-8 parts of SiO2 aerogel, 0.2-0.4 part of graphene oxide, 0.2-0.4 part of a water reducing agent, 0.05-0.1 part of a waterproof agent and 0.09-0.2 part of a foaming agent. Each component can play a synergistic role in specific proportions, can significantly improve the water resistance of the gypsum-based foam concrete, and the water absorption rate of the gypsum-based foam concrete is obviously reduced.