92results about How to "Appropriate setting time" patented technology

The invention discloses a desulfurizing plaster self-leveling material, which main component weight percent are as follows: 30-65% desulfurizing plaster, 25-60% high-alumina cement, 0-30% ordinary portland cement, 0-20% fly ash, 0-8.0% redispersing emulsion powder. The material comprises an amount of additive and fine aggregate. Blending each component at determined weight percent fully and uniformly in a blender, packing to get self-leveling material. The invention can prepare self-leveling material by desulfurizing plaster massively, has more simple manufacturing technique, less energy consumptions, low cost, moderate coagulation time, strong and better water resistance, microswelling performance, can be widely applied to kinds of leveling execution.

The invention discloses a titanium gypsum composite binding material and a preparation method thereof, wherein the titanium gypsum composite binding material comprises a binding material, water, an admixture and a modifying agent. The preparation method comprises the following steps of: (1) drying titanium gypsum; (2) breaking and grinding the titanium gypsum; (3) calcining the titanium gypsum; (4) aging the titanium gypsum; (5) weighing various components in proportion; (6) adding the processed titanium gypsum in a stirrer, starting the stirrer, and under a low-speed stirring state, sequentially adding coal ash, cement, quick lime, bone glue and a naphthalene water reducer, meanwhile adding water in proportion, and stirring for 5 minutes at a high speed after all materials are added; and (7) casting and forming. The titanium gypsum composite binding material disclosed by the invention has the advantages of low water requirement of normal consistency, proper coagulation time, comparative high early fracture resistance and compressive strength, and the like, and is applicable to production of building indoor partition walls, sandwiched panels, and the like.

The invention relates to a building brushing plaster and preparing method, including semiwater plaster and water retention agent, its character: also anhydrite powder and exciter is added to it, where wt% of each component: anhydrite powder 80-90, semwater plaster 3-13, exciter 1-7 and water retention agent 0.1-0.3. its preparing method: 1), milling natural anhydrite into powders by industrial ball mill, where the particle size is that the rest is less than 3% by 200 eye screen and the specific surface area is 4500-7000 sq cm/g; 2), preparing raw material: according to the demand, additionally adds in hydraulic cementitous material, which accounts for 0-15% of total weight; 3) weighing all the raw materials, mixing in the mixer to make the brushing plaster powder at once. The fine sand less than 5 mm can be added to mixed raw materials according to the demand to make the bushing substrate. It has water proofness.

A self-leveling material is proportionally prepared from the gypsum ore tailings, slag powder, ordinary silicate cement, river sand, trigger, early-strengthening agent, redispersible colloid powder, and efficient water-reducing agent.

The invention discloses a natural anhydrite based lightweight interior wall plastering gypsum material used in the field of construction, and a preparation method thereof. The natural anhydrite based lightweight interior wall plastering gypsum material is prepared from the following components in percentage by weight: 75-85% of natural gypsum powder, 5-10% of alkali activator, 5-10% of lightweight aggregate, 0.5-2.0% of acidic activator, 0.3-0.5% of water-retaining agent and 0.50-1.0% of cement powder. The preparation method of the natural anhydrite based lightweight interior wall plastering gypsum material comprises the following steps: weighing well-ground gypsum powder based on the weight percentage according to claim 1; uniformly mixing the gypsum powder in a mixer to obtain the natural anhydrite based lightweight interior wall plastering gypsum material. The natural anhydrite based lightweight interior wall plastering gypsum material disclosed by the invention has the advantages of good stability, water-retaining capacity, sagging capacity, large unit plastering area, light weight, heat preservation, good adhesive performance, firm adhesiveness, slight expansibility, convenience for construction, and capabilities of greatly enhancing the adhesiveness between the product and a base material, avoiding undesirable effects such as cracks and realizing both manual construction and mechanized construction.

The invention discloses a silk fibroin/calcium phosphate bone cement-based porous composite material and a preparation method thereof. The composite material comprises calcium phosphate, silk fibroin and calcium sulfate. The preparation method comprises the following steps of: adding silk fibroin grains with a hollow structure into composite powder of calcium phosphate and calcium sulfate to prepare a composite material solid phase; and adding a solidified liquid into the solid phase in a certain liquid-solid ratio, and blending into paste, wherein a final product is hydroxyapatite similar to the ingredient of human bone. The composite material can be directly injected into surgical sites by an injector, and can be accurately molded and solidified to form a bone repairing filling material; or the composite material can perform self-solidification at in vitro environment and then is implanted into the human body to be used as a bone repairing implanting material. According to the invention, a pore structure is formed by swelling and deformation of silk fibroin in the solidification process of calcium phosphate bone cement base, so that the composite material is good in toughness and biocompatibility, and the pore structure of calcium phosphate bone cement is improved, and the calcium phosphate bone cement is more close to an artificial bone. Thus the composite material disclosed by the invention has wide application prospect.

The invention belongs to the technical field of building materials, and particularly relates to a Portland cement made from self-pulverized clinker and slag and a preparation method for the Portland cement. The Portland cement made from the self-pulverized clinker and the slag is characterized in that the Portland cement is made from the slag, plaster and the self-pulverized clinker by means of mixing and comprises 57%-87% of the slag, 3%-18% of the plaster and 1%-30% of the self-pulverized clinker in weight percent. The self-pulverized clinker is prepared according to the steps of preparing cement raw materials by means of arbitrary combination of the lime saturation coefficient ranging from 0.589 to 0.823, the silica ratio ranging from 2.5 to 4.0 and the alumina ratio ranging from 1.0 to 2.8 of the clinker; and grinding the cement raw materials to the degree with screen residues smaller than 18% by means of sieving of a sieve with the 0.08mm side length of a sieve mesh, calcining the grinded cement raw materials for 0.5 hour to 1.5 hours at the high temperature ranging from 1200 DEG C to 1380 DEG C prior to slowly cooling to the room temperature with the cooling rate of 15-45 DEG C /min, and obtaining the self-pulverized clinker. The method is simple in process, low in calcining temperature and low in grinding power consumption, and carbonization resistance of the Portland cement can be improved by the method.

The invention belongs to the field of a constructional material, in particular relates to a hydraulic binding material and a preparation method thereof. The hydraulic binding material is characterized in that the hydraulic binding material is prepared with 35 percent to 75 percent of limestone by mass, 5 percent to 50 percent of industrial residue by mass, 0 percent to 10 percent of plaster by mass and 0 percent to 20 percent of additives by mass through mixing. The mass percents of the plaster and the additives are not 0 at the same time, and the total of the mass percents of the raw materials is 100%. The hydraulic binding material and the preparation method can make use of much limestone; the preparation method is simple in process; the cost is low; little energy is consumed; and the hydraulic binding material is environment-friendly.

The invention discloses a method for solidifying radioactive waste resins with a naphthalene series water reducer and cement in the technical field of radioactive waste resin solidification with cement. The method comprises the following steps of: uniformly mixing sulphate aluminum cement, compound additives and a UNF-5 water reducer; mixing the mixture with radioactive waste resins in an agitating kettle and agitating for 3 minutes; transferring to a die with the diameter phi of 50mm*50mm; and flatting and maintaining for 7 days in a maintenance box to obtain a solidified product. According to the method disclosed by the invention, water does not need to be added to the mixture in the solidification process of the radioactive waste resins, slurry has proper fluidity and setting time, andthe solidified product has higher compression strength.

The invention discloses high-polymer easy plaster and belongs to the field of polymer waterproof mortar. The easy plaster comprises raw materials in parts by weight as follows: 30-50 parts of cement, 40-80 parts of quartz sand, 10-25 parts of ash calcium powder, 3-7 parts of polyvinyl alcohol and 2-4 parts of re-dispersible emulsion powder. The raw materials of the high-polymer easy plaster are simple and easy to obtain, and the product is environment-friendly, has excellent bonding strength, prominent impermeability, suitable setting time and water retention and alkali-resistant properties and the like and can be widely applied to permeability and damp resistance and waterproof plugging of positions such as internal and external walls, basements, swimming pools, toilets, water reservoirs and the like.

The invention relates to mineral admixture concrete and a preparation method thereof and belongs to the field of building materials. The preparation method is characterized in that a composite solid exciting agent is utilized to excite potential activity of a mineral admixture and produces a synergistic effect with common cement so that the mineral admixture concrete having strength of C30-C70 and excellent durability such as anti-permeability and frost-resistance and allowing normal setting time is obtained. The composite solid exciting agent can greatly improve the strength and the durability of the mineral admixture concrete. Through replacement of 90 to 95% of cement with a large amount of an industrial waste residue-slag powder-fly ash admixture, a production cost is reduced obviously. The mineral admixture of a cementing agent, a sand aggregate and the composite solid exciting agent is pre-stirred and then is added with mixing water so that the composite solid exciting agent is dispersed uniformly and after addition of the mixing water, the mineral admixture can be fully excited. In construction, the mineral admixture concrete has good workability and no ropiness, can be operated easily, has high strength after setting and hardening, good durability and a low cost, and can be used in various engineering construction and concrete products.

The invention discloses an energy-saving type impervious waterproof building concrete and a preparation method thereof. The raw materials comprise, by weight part, 68-75 of Portland cement, 23-25 of black soil powder, 12-15 of graphite powder, 8-10 of aluminum nitride powder, 3-4 of iron oxide red powder, 10-15 of a mushrooms cultivation material, 0.4-0.6 of tetramethyl guanidine, 2-4 of calcium stearate, 1.5-2.0 of sodium tripolyphosphate, 0.8-1.0 of sodium tartrate, 1.2-1.5 of amino sulfonic acid, 2-4 of a milky white glue, 4-5 of zinc chloride, 1.0-1.5 of sodium alginate and a proper amount of water. The concrete provided by the invention has the characteristics of high hardening strength, good water resistance, impermeability and watertightness, and suitable setting time. The concrete provided by the invention adopts a variety of waste materials as the raw materials, saves energy, reduces pollution, and has small dosage of additives, thus reducing the production cost.

The invention discloses anhydrite-based light plastering mortar and a preparation method thereof. The anhydrite-based light plastering mortar which is light, energy-saving, good in comprehensive performance and simple in process and is prepared by taking anhydrite as a main material is researched and developed, and the anhydrite-based light plastering mortar has important practical significance. The anhydrite-based light plastering mortar is composed of anhydrite, cement, fly ash, an excitant, vitrified microbead, a thickening agent and a water-retaining agent. The concrete is composed of thefollowing components in parts by weight: 65-70 parts of the anhydrite, 8-10 parts of the cement, 4-8 parts of the fly ash, 4-6 parts of the excitant, 0.15-0.2 parts of the water-retaining agent, 0.1-0.15 part of the thickening agent, and 13-16 parts of vitrified microbead. The anhydrite-based light plastering mortar is prepared by adopting anhydrite associated in a pyrite production process as a main material, calcination treatment is not needed, only physical grinding and mixing are needed, the preparation process is simple, energy is saved, and pollution is reduced; and the problems of hollowing and cracking of the traditional mortar are fundamentally solved.

A water-hardening cementing material is proportionally prepared from the gypsum ore tailings, the slag powder prepared from water-quenched slag and P slag through baking and grinding, powdered coal ash, trigger and early-strengthening agent through mixing.

The invention discloses a bone repair material composition, a bone repair material and a preparation method and application of the bone repair material. The bone repair material composition comprisesa bone cement component and curing liquid, wherein the bone cement comprises magnesium oxide, calcium hydrophosphate, sodium dihydrogen phosphate and hydroxyapatite, and the curing liquid is a sodiumphytate aqueous solution. The bone repair material disclosed by the invention is simple to prepare and proper in coagulation time, has good biocompatibility, osteogenesis and degradability, can be directly injected into a bone defect part, has anti-osteoporosis performance and has an obvious osteogenesis effect.

The invention belongs to the field of environmental protection, and in particular relates to green and environment-friendly masonry mortar, consisting of the following raw materials in percentage by weight: 20-25% of phosphorus slag powder, 15-20% of modified alum sludge, 8-12% of cement, 0.01-0.05% of a tackifying water retention agent, 0.2-1% of a thixotropic lubricant, 0.02-0.08% of an intensity excitant, 0.01-0.1% of a dispersant, and the balance of river sand. The green and environment-friendly masonry mortar provided by the invention ingeniously makes use of a coagulation accelerating property of an aluminum-containing compound in the alum sludge, and the alum sludge is used together with the phosphorus slag powder to ensure that the masonry mortar provided by the invention has an appropriate coagulation time. The environmental protection pressure and the waste discharge burden of a waste discharge enterprise can be significantly reduced, and the ecological environment can be improved.

The invention relates to anti-collapsible injectable magnesium phosphate-based bone cement. The anti-collapsible injectable magnesium phosphate-based bone cement is composed of a powder phase and a liquid phase, and the powder phase comprises magnesium oxide, potassium dihydrogen phosphate, calcium phosphate salt, citric acid (or sodium citrate) and polysaccharide (or a polysaccharide derivative),wherein the magnesium oxide is 26-28 parts by mass, the potassium dihydrogen phosphate is 52 to 55 parts by mass, the calcium phosphate salt is 16 to 18 parts by mass, the citric acid (or sodium citrate) is 0 to 4 parts by mass, and the polysaccharide (or polysaccharide derivative) is 0 to 1 part by mass. The liquid phase is an aqueous solution of glycerin. The powder phase and the liquid phase are uniformly mixed at a ratio of 1.8 to 2.4 g/mL, a mixture is conditioned for 4 to 6 minutes to form viscous slurry, and the mixture can be injected by a syringe. The injectable magnesium phosphate-based bone cement has good anti-collapsing performance, suitable coagulation time and high strength, is degradable, has good cell compatibility, and is suitable for injection filling of orthopedic anddental cavity defects in ordinary or minimally invasive surgery.

The invention relates to a steel slag cement active enhancer. The steel slag cement active enhancer is composed of potassium aluminum sulfate, ammonium aluminum sulfate, sodium metesilicate, ferrous sulfate and melamine resin, thereby leading the early stage hydration process to timely generate appropriate amount of ettringite, calcium silicate hydrate, xonotlite, gyrolite, thomsonite, natrolite, analcime, calcium iron sulfide hydrate, calcium sulphoaluminate hydrate and others to form a cross-linked frame structure and allowing the later stage to be continuously strengthened and meet the comprehensive requirements of the use. The steel slag cement active enhancer is characterized in that: the reflected strength, the coagulation time and other performances of the early stage frame structure can achieve or be higher than the performances of the same-stage general portland cement; multi-center substances which are formed by the secondary reaction and the continuous hydration and are penetrated and connected can ensure the calcium complex salt structure to be continuously thickened and strengthened; the early stage strength is high, the coagulation time is moderate, hardened cement paste and the prepared concrete have better workability, compactibility, durability, impermeability, anti-shrinkage property, corrosion resistance, anti-freeze-thaw property, anti-carbonization property and the like; the mixing amount is less, the performance to price ratio is low, the steel slag cement active enhancer has low alkali, no chlorine, no toxicity and no side effects; and the application range is wide.

A high sulfur silicate cement contains SO3 (1.5-3.0%), CaO (63-68%) and CaSO4 (2.6-5.1%), and is prepared through calcining at 1350-1400 deg.C while controlling such parameters: KH=0.92-1.0, n=1.90-2.50, p=1.0-1.8 and SR=0.18-0.32, where SR=SO3/Al2O3+Fe2O3. Its advantages are less exhaustion of toxic waste gas, high strength and performance, and low cost.

The invention discloses modified repair mortar. The modified repair mortar is prepared by mixing sulphoaluminate cement, ordinary silicate cement, quartz sand, a complex early strength agent, a water-retaining agent, anti-crack fibers, a water reducing agent and water. According to the modified repair mortar, a sulphoaluminate cement and ordinary silicate cement mixed cementing material is adopted, the optimal mix and match proportion is selected, the early strength of the mortar is high, the setting time is proper, and construction is convenient. In addition, the complex early strength agent, the water-retaining agent, the water reducing agent and the like are added, and therefore better strength of the mortar in early stage and later stage is effectively guaranteed. The anti-crack fibers are added in the components, shrinkage deformation of the mortar is greatly reduced, when the mortar is under stress, the anti-crack fibers play an active prevention role in generation and development of cracks, the shrinkage deformation is obviously reduced, and cracks generated in the repair mortar setting and hardening processes and under stress are reduced.