32results about How to "Extended hydration time" patented technology

The invention relates to a coagulation controllable type cement based pore sealing material and application method thereof. A sulfoaluminate-silicate composite cement system with a certain ratio is adopted, a proper amount of industrial aluminum powder, a high efficient water reducer, and a resin type polymer material is added; an individual grinding technology is adopted, sulfoaluminate cement clinker and resin are grinded together at first so that fine resin particles can be adsorbed on the surface of the mineral particles in sulfoaluminate cement clinker; during the construction process, after the material is contacted with water, the resin wrapped on the surface of the clinker particles reacts with water to form a crosslinking coating film, the hydration of sulfoaluminate minerals is sustained-controlled therefore; the forming speed and forming amount of hydration products such as ettringite (Aft), hydrated aluminate, and the like can be adjusted; the setting time of sealing materials is effectively delayed; the construction becomes convenient, moreover, the sealing material can continuously and slightly expands in the sealed holes, a high early strength is provided for the material, the hydration shrinkage of silicate phase is compensated at the same time, and thus the pore sealing material can be used for a long time.

The invention discloses an anti-drought plant cultivation method, relates to the technical field of plant cultivating and planting, and particularly belongs to an anti-drought conservation and cultivation method capable of improving plant survival rates in soil-barren and drought regions. The anti-drought plant cultivation method is characterized by comprising the following steps: materials are prepared; a water storing and slowly releasing devices are designed; the water storing and slowly releasing devices are manufactured; contents are filled; water storing and slowly releasing devices are selected and used; and planting is conducted. The anti-drought plant cultivation method has the advantages of improving plant survival rates, saving water resources and improving wood yields and wood quality.

The invention discloses cement plastering mortar, which comprises cement, medium and fine sand, a water-retaining thickener, polymer emulsion powder, an anti-cracking agent, an expanding agent and an internal curing agent. After the internal curing agent is mixed into the common cement plastering mortar, numerous 'miniature reservoirs' are established in the cement mortar; therefore, when the mortar lacks of water, the water in the internal curing agent can be slowly released for the continuous hydration of the cement and the expanding agent until the water is exhausted. Longer hydration time is provided for the expanding agent to generate more expanded crystals, namely ettringite. A drying shrinkage value of the cement mortar is reduced, and the crack resistance of the plastering mortar is improved.

The invention discloses a method for improving the quality of a capsanthin product, comprising the following steps of: selecting capsanthin resin as an initial raw material; feeding the capsanthin resin in a mixer; adding water in the mixer, wherein the weight ratio of the capsanthin resin to water is 1: (0.05-0.2); stirring and mixing at a temperature of 40-50DEG C and at a rotating speed of 100-250rpm to obtain a mixed solution; cooling the mixed solution to be 30-40DEG C; centrifugally separating by using a centrifugal machine and collecting a clarified solution; and finally, carrying out gingerol and residue removal on the clarified solution to obtain a capsanthin finished product. The capsanthin finished product prepared by the method has favorable flowability; the phenomenon that precipitation demixing after the capsanthin product is placed for a long time is avoided; the content of a centrifugal precipitation is controlled within 2 percent; and the content of acetone insoluble substance of phospholipids is reduced below 1 percent.

The invention discloses a preparation method of retarding and efficient water reducing agent for silicate cement and calcined gypsum. The preparation method is characterized by comprising the steps of feeding 60 to 70 mass parts of polyolefine derivative, 5 to 15 mass parts of maleic anhydride, 10 to 20 mass parts of methylacrylic acid and 2 to 10 mass parts of radical initiator into a reaction kettle, adding 140 to 220 mass parts of water into the reaction kettle, stirring, raising the temperature to 60 to 90 DEG C, reacting for 3-6h at 60 to 90 DEG C, reducing the temperature to room temperature after the reaction, then adjusting the pH value of reacted material to 6 to 8 with alkaline pH regulator, and then obtaining yellowish retarding and efficient water reducing agent products, wherein the mass percent of solids in the products is 30-50%. The preparation method has the advantages that the production process and equipment are simple, mass industrial production is easy to realize, the retarding effect on silicate cement and calcined gypsum material is obvious, and the water-reducing rate is high.

Provided modified aluminate cement is prepared from the following raw materials: aluminate cement, titanium-silicon micro-nano capsules, magnesium oxide, a phosphate, fly ash, modified acrylic emulsion and an activating agent, wherein the titanium-silicon micro-nano capsule is prepared from orthosilicate and titanate under the conditions of a surfactant and alkalinity. The aluminate cement prepared by the invention is wide in raw material source and simple in preparation method, has good high-temperature resistance, wear resistance, sulfate corrosion resistance, adhesion, crack resistance, freezing resistance, seepage resistance, corrosion resistance and aging resistance, also has good effects of adsorbing and degrading formaldehyde and organic pollutants due to the TiO2 structure, plays agood role in environmental protection, ensures the safety as a structural part, and has a wide application prospect.

The invention discloses a breeding method of selenium-rich crabs. Focusing on different growth periods of crabs, different artificial feeds are provided to feed the crabs, selenium-rich breeding is carried out in the aspects of the living environment and feeding of the crabs, the water quality is kept safe and free of pollution, the disease incidence is reduced, selenium-rich environment is created, and selenium-rich feed is provided, so that the selenium-rich crabs are produced. The artificial feeds are prepared from basic feed, microbial preparation, nano-selenium, minerals and vitamins.

The invention discloses a cement accelerator and belongs to the field of buildings. According to the cement accelerator disclosed by the invention, a substance with a cement accelerating effect is prepared by taking aluminum sulfate octadecahydrate and calcium oxide as raw materials and carrying out high-speed shearing; lithium slag is used as a raw material, is subjected to microwave treatment and is enabled to have more free lithium salts and the like, so that condensation of cement concrete can be promoted and the initial set time is shortened; in addition, alumina and calcium sulfate in the lithium slag also react to generate calcium sulphoaluminate hydrate, so that early strength can be improved; bamboo fibers are added for compounding and raw bamboo fibers are doped, so that the volume shrinkage stress is digested, and further cracks are reduced; the breaking strength of cement-based mortar is improved along with the increase of the doping amount of the raw bamboo fibers; the anti-cracking and compressive strength of the cement slurry at later stage is improved, and further the quality of cement is improved.

The invention relates to an additive capable of improving the adsorption capacity of concrete to PM2.5, and a preparation method and an application thereof. The additive is prepared from the followingcomponents in percentages by mass: 25% to 55% of organic modified bentonite, 10% to 50% of silica fume, 15% to 35% of hydrotalcite powder and 0.1% to 0.3% of polyether modified polysiloxane. The preparation method provided by the invention comprises the following steps: uniformly mixing the above-mentioned raw materials, then placing an obtained mixture into a grinding machine, and carrying out grinding until the specific surface area of a powder reaches 400 m2 / kg or more so as to obtain the additive. When the additive obtained by using the preparation method provided by the invention is usedin concrete, the addition amount of the additive accounts for 5% to 20% of the total mass of a concrete cementing material. The additive provided by the invention adopts an inorganic salt mineral asa main raw material, can improve the adsorption capacity of the concrete to the PM2.5 when being applied in the concrete, can compensate the strength loss of the concrete through hydration of mineralcomponents in the additive, prolongs the hydration time of the concrete, and extends the adsorption effectiveness of the concrete.

The invention discloses a peat soil solidifying agent based on a replacement function and a use method of the peat soil solidifying agent, and belongs to the technical field of soil solidifying. The solidifying agent is prepared from raw materials: machine-made sand with a replacement rate being 40%-60% calculated according to the mass percentage of the water-free soil particles in natural peat soil, 15%-45% of cement calculated according to the mass of the peat soil after the replacement, 10% of phosphogypsum, 3% of sodium sulfate, 1.5% of sodium chloride and 100% of water which are calculated according to the mass of cement. The use method of the solidifying agent includes the steps that after the peat soil is replaced with the machine-made sand, the peat soil is solidified by adding other materials. According to the peat soil solidifying agent based on the replacement function and the use method of the peat soil solidifying agent, the mechanical properties of the peat soil can be significantly improved; the amount of cement required for solidifying the peat soil is reduced, a new way for the solidification of the peat soil with sand with environment-friendly benefits is createdthrough the utilization of the machine-made sand, and the environmental pollution caused by stacking of the peat soil is reduced due to the utilization of phosphogypsum; and the solidifying agent rawmaterials are easy to obtain, the use method is simple, the cost is low and certain environment-friendly and economic benefits are achieved.

The invention relates to a wet-mixed mortar additive and a preparation method thereof. The wet-mixed mortar additive is prepared from the following raw materials in percentage by weight: 0.5-1.5% of sodium alpha-olefin sulfonate, 2-5% of dodecyl sulfuric acid, 3-8% of a polycarboxylate superplasticizer, 10-15% of sodium gluconate, 1-3% of diethanol amine, 2-5% of sodium sulfate, 2-5% of 4-methyl-2-pentenoic acid, 5-10% of modified nano silicon dioxide and the balance of water. The wet-mixed mortar additive prepared by the invention has good water retention capacity, can effectively prolong thehydration time of mortar, and improves the operability of cement mortar.

The invention discloses a construction method of a modular fabricated steel structure house. The construction method specifically comprises the following steps including (1) house modular design; (2)steel structure wall surface treatment; (3) foundation construction; (4) steel structure skeleton mounting; (5) structure modular construction; (6) structure module inside concrete pouring; (7) prefabricated exterior wall mounting; and (8) water, electricity and heating pipeline connection. According to the construction method provided by the invention, by spraying polymer mortar on steel structure walls and to-be-poured surfaces, the bonding force between a steel structure and concrete interfaces and the corrosion resistance of the steel structure are enhanced; foundation pouring concrete isprepared by adopting a strong retarding type polycarboxylic acid water reducer, and concrete internal stress cracking is reduced; and a foundation concrete vibrating bar is wrapped with a polytetrafluoroethylene coating, and the foundation concrete compactness, mechanical property and durability are improved.

The present invention discloses a water replenishable flowerpot. An integrally-formed water replenishing pot is disposed at an outer side of a flowerpot body and is arranged at an upper half part of the flowerpot body, a water replenishing circular groove is formed by enclosing of an outer wall of the flowerpot body through the water replenishing pot, an upper end of the water replenishing circular groove is open, the water replenishing circular groove is communicated with the flowerpot body through water replenishing holes in the flowerpot body, the water replenishing holes surround the flowerpot body to form a water replenishing ring, a lower half part of the flowerpot body is provided with gradient-type flowerpot hollowed parts, the flowerpot hollowed parts are arranged in an aligned manner in the middle part of the flowerpot body and divide the flowerpot bottom part into a left half part and a right half part symmetrically, and the flowerpot bottom part is also provided with water leaking holes. The flowerpot is simple in structure, water can be automatically replenished to the flowerpot, watering time can be prolonged, the flowerpot can also be placed on indoor and outdoor handrails, and space can be saved.

The invention relates to the field of building materials, and particularly discloses saltpetering-resistant concrete with an automatic shrinkage compensation function. The saltpetering-resistant concrete with the automatic shrinkage compensation function is prepared from the following raw materials: cement, a filling material, an saltpetering-resistant agent, mineral powder, fine aggregate, coarseaggregate and water, wherein the saltpetering-resistant agent is prepared from carboxymethyl cellulose grafted polyethylene glycol monomethyl ether and salicylic acid; the preparation method comprises the steps of weighing and mixing. The concrete has the following effects that the shrinkage rate is remarkably reduced while the efflorescence resistance of the concrete is remarkably improved, andthe concrete has the advantage of automatic shrinkage compensation.

The invention discloses a biomedical alpha-Ca (HPO4) x (SO4)1-x*1 / 2H2O solid solution particle and a preparation method thereof. By means of a wet-chemical method and heat treatment, parts of SO4 <2-> in CaSO4 are promoted to be replaced by HPO4<2-> to obtain the alpha-Ca (HPO4) x (SO4)1-x*1 / 2H2O solid solution particle, and compositions and proportions of the alpha- Ca (HPO4) x (SO4)1-x*1 / 2H2O solid solution particle can be adjusted. The prepared alpha-Ca (HPO4) x (SO4)1-x*1 / 2H2O solid solution particle can be widely used in the filed of biomedical materials of bone filling materials, bone cement and the like.

The invention discloses an osmotic pump controlled release tablet with a milnacipran selected-time delayed controlled release function and a method for preparing the osmotic pump controlled release tablet. The osmotic pump controlled release tablet comprises a tablet core and a semi-permeable membrane with medicine release holes. The tablet core comprises a medicine containing layer and a propulsion layer, the medicine containing layer comprises hot-melt extrusion substances, the hot-melt extrusion substances are prepared from milnacipran and hot-melt excipients, the hot-melt excipients preferably are compositions of PVP (polyvinyl pyrrolidone) and PEG (polyethylene glycol), and a weight ratio of the PVP to the PEG is 4:1-10:1; the propulsion layer comprises polyoxyethylene, osmotic pressure active substances, povidone and the like; the medicine containing layer and the propulsion layer are compressed to obtain a double-layer tablet, then the semi-permeable membrane wraps the double-layer tablet, and the semi-permeable membrane is perforated. According to the technical scheme, the osmotic pump controlled release tablet and the method have the advantages that medicines can be effectively released in a controlled manner, medicine onset blanking periods can be shortened, the osmotic pump controlled release tablet which is prepared by the aid of hot-melt extrusion processes can becompletely released in an in-vitro manner and effectively conforms to zero-order release characteristics, and the bioavailability and the stability of the osmotic pump controlled release tablet whichis a product can be improved.

The invention discloses a preparation method of retarding and efficient water reducing agent for silicate cement and calcined gypsum. The preparation method is characterized by comprising the steps of feeding 60 to 70 mass parts of polyolefine derivative, 5 to 15 mass parts of maleic anhydride, 10 to 20 mass parts of methylacrylic acid and 2 to 10 mass parts of radical initiator into a reaction kettle, adding 140 to 220 mass parts of water into the reaction kettle, stirring, raising the temperature to 60 to 90 DEG C, reacting for 3-6h at 60 to 90 DEG C, reducing the temperature to room temperature after the reaction, then adjusting the pH value of reacted material to 6 to 8 with alkaline pH regulator, and then obtaining yellowish retarding and efficient water reducing agent products, wherein the mass percent of solids in the products is 30-50%. The preparation method has the advantages that the production process and equipment are simple, mass industrial production is easy to realize, the retarding effect on silicate cement and calcined gypsum material is obvious, and the water-reducing rate is high.

The invention relates to the technical field of building materials, in particular to a grouting material for reinforcing a medium-coarse sand layer and a preparation method thereof.The grouting material is prepared from 30-50 parts of superfine slag powder, 15-45 parts of water, 0.2-0.4 part of a water reducing agent and 1.7-4.5 parts of an alkaline exciting agent, and the alkaline exciting agent is a mixture of sodium hydroxide, sodium carbonate, calcium hydroxide and calcium formate. The superfine slag powder is adopted as a gelling component of the grouting material, the activity of the superfine slag powder is thoroughly excited through the alkaline exciting agent with specific composition, and the defect of the superfine slag powder is overcome by matching with the water reducing agent with specific dosage, so that the prepared grouting material is high in early strength, good in fluidity, appropriate in hardening time and suitable for construction characteristics of a medium-coarse sand layer reinforcing process; and preparation of the building material only by using the superfine slag powder becomes reality.

The invention provides a preparation method of a natural moisturizing cream. The moisturizing cream is prepared by compounding pomelo peel polysaccharide, passion fruit pectin, ginger essence oil, chlorogenic acid, alpha-glucosidase and gamma-polyglutamic acid with chitosan. The gamma-polyglutamic acid and the pomelo peel polysaccharide have high water retention performance; the raw materials arenatural materials; the alpha-glucosidase is used for degrading the passion fruit pectin and generating multiple refreshing fragrance smells; meanwhile, the pomelo peel polysaccharide and the passion fruit pectin have an excellent antibacterial effect and an excellent effect of removing free radicals; the ginger essence oil is capable of accelerating skin adsorption and also has antibacterial and anti-ultraviolet effects; the chlorogenic acid and the chitosan can achieve the whitening effect. The prepared moisturizing cream is natural and healthy, is easily absorbed by the skin, and has excellent antibacterial, anti-ultraviolet and whitening effects.

The invention discloses a humidifying device of respiratory support equipment. The device comprises a box body, a water supplementing chamber and a humidifying chamber are arranged in the box body ina partitioned mode, and the water supplementing chamber is communicated with the humidifying chamber through a pressure balance channel; the water supplementing chamber supplements water into the humidifying chamber in a storage mode or / and an intravenous injection mode, wherein a water supplementing opening is formed in the top end of the water supplementing chamber, and the bottom is communicated with the humidifying chamber through a communicating hole; the water supplementing chamber is further provided with an intravenous injection port and is internally provided with a floating ball, andthe floating ball can be far away from or close to the intravenous injection port; and a heating device is arranged in the humidifying chamber. According to the humidifying device, the water supplementing chamber and the humidifying chamber are arranged in a partitioned mode, water in the humidifying chamber can be heated to a designated humidifying temperature in a short time, and the floating ball can be prevented from being burnt out under the empty burning condition of the humidifying chamber. The water supplementing chamber supplements water to the humidifying chamber, so that the watersupplementing time of the humidifying chamber is prolonged, and application scenes with different requirements are met.

The invention relates to the technical field of water treatment and discloses a rainwater collecting and spraying ground irrigation system. The system comprises a water storage tank arranged beside aroad, wherein one side of the water storage tank is provided with a nursery stock planting area or a flower planting area, and one end of the water storage tank is communicated with a water collectingpit; a submersible pump is arranged at the bottom of the water collecting pit and communicated with a spray pipe, and the spray pipe is arranged on the side edge of the nursery stock planting area orthe flower planting area; one end of the water storage tank is communicated with a reservoir, and a ground irrigation pipe is communicated in the reservoir and extends into the nursery stock plantingarea or the flower planting area; one side of the nursery stock planting area or the flower planting area is provided with a wallboard. Water in the water storage tank flows into the water collectingpit and the water storage tank, the submersible pump pumps the water into the spray pipe for spraying, the ground irrigation pipe uses the water in the water storage tank for water supplementation underground, the wallboard locks the water, the water supplementation time is prolonged, the shapes of root plots are protected, the deviation of the position of the ground irrigation pipe is avoided, the use effect of the system is improved, and the service life of the system is prolonged.