49results about How to "Guaranteed physical and mechanical properties" patented technology

The invention provides a pressure grouting experiment device comprising a slurry supplying device, wherein the slurry supplying device is communicated with a slurry hole of an experiment mould; a lower slurry hole of the experiment mould is communicated with a slurry recycling barrel; a plurality of pipelines are arranged on the outer wall of the experiment mould from top to bottom; each pipeline is provided with a pressure gage; and throttling valves are arranged between the slurry supplying device and the experiment mould and also between the experiment mould and the slurry recycling barrel. According to the pressure grouting experiment device disclosed by the invention, grouting stone bodies with the regular shape can be easily and conveniently obtained through using different moulds, and slurry dispersion radiuses under the different conditions can be obtained. In the testing process, pressure P provided by matching the pressure gages and a flow meter with a jack can relatively and effectively analyze influences of a testing parameter to each physical mechanical property of the stone bodies and the slurry dispersion radiuses. According to the pressure grouting experiment device disclosed by the invention, the grouting amount can be quantized, so that components of the stone bodies are also quantized. The pressure grouting experiment device is small and exquisite, convenient and easy to use, and is particularly suitable for being used in a laboratory.

The invention discloses a polyamide/ polyester alloy and a preparation method thereof. The polyamide/ polyester alloy has the components according to the mixture ratio of parts by weight: 65-87% of poly adipic acid hexanediamine, 5-20% of polyethylene glycol terephthalate, 6-10% of toughener, 1-3% of compatilizer, 0.2-0.6% of antioxidizer and 0.1-5% of other accessory ingredients. Besides having excellent toughness, the polyamide/ polyester alloy can maintain other physical mechanical property of the material. The technique for preparing the polyamide/ polyester alloy is simple and has low cost.

The invention discloses a lining model used for a shield tunnel longitudinal model test and a manufacturing method thereof. The segmental lining model comprises cutting slots and longitudinal connector sheets. The manufacturing method comprises the steps that the model parameters are calculated by drawing up the similarity ratio, trial manufacturing is performed and whether the mechanical parameters meet the requirements is tested, and then pouring of the segmental lining model is performed and splicing is performed. The shield tunnel segmental lining structure stiffness is ensured to be consistent with that of the prototype tunnel structure, and the local stress state of the segmental lining longitudinal connectors can also be reflected so as to have high popularization value.

The invention discloses a ferronickel slag magnesium phosphate binding material and application thereof. The binding material is prepared from 6-12 parts of ferronickel slag, 12-25 parts of dead burned magnesia, 3-12 parts of phosphate and 1-10 parts of retarder. The ferronickel slag magnesium phosphate binding material is used in structural members requiring high strength in early age period and rush-repair work. The ferronickel slag magnesium phosphate binding material has the advantages of achieving rapid hardening and early strengthening, and being high in strength and small in shrinkage deformation, the interior structure is more compact, the porosity is low, and the durability including water tolerance is improved. Moreover, according to the ferronickel slag magnesium phosphate binding material, innocent treatment of the ferronickel slag is achieved, high-efficiency resource utilization of industrial waste residues is promoted, and on the premise that the mechanical properties of the binding material is guaranteed, the consumption of dead burned magnesia is reduced, the consumption of a non-renewable resource, namely magnesite, and energy loss are reduced, the production cost of the magnesium phosphate binding material is decreased, and therefore, economic benefits and environmental benefits are remarkable.

The invention provides a method and a device for welding PTFE plates. The weld strength and the elongation at break of the welded PTFE plates are not less than 80% of the physical mechanical property of an original plate. The method comprises the following steps: two PTFE plates are in butt joint with each other, and butt-joint areas are heated so as to be melted, then are cooled, and are pressed when being heated, and melts in heating areas can freely flow in the direction vertical to butt-joint seams and parallel to the PTFE plates under the condition of bearing pressure. The device comprises a fixing device used for fixing one PTFE plate, a heating device used for heating the butt-joint areas, a clamping device used for clamping the other PTFE plate, and a pressing device including ropes and pulleys; the ropes are used for hanging balance weights, and are connected with the clamping device through the pulleys; and the balance weights enable the clamped PTFE plate to tightly press the other fixed one in the direction vertical to the butt-joint seams and parallel to the PTFE plates.

The invention belongs to the building technology, relates to a steaming-free production technology for a PHC pipe pile and application of the steaming-free production technology and provides a steaming-free curing method for the pipe pile. The method includes the following steps that firstly, the pipe pile is subjected to insulation curing before demolding; and secondly, the pipe pile obtained after insulation curing in the step (1) is demolded and is subjected to natural curing after being demolded. The invention further provides the application of the above method in the production technology for the PHC pipe pile and the steaming-free production technology for the PHC pipe pile. By means of the steaming-free production technology for the PHC pipe pile and the application of the production technology, the steam curing link is omitted in the pile manufacturing process, the manufacturing difficulty and cost of the pipe pile are lowered, energy is saved, environment friendliness is facilitated, the performance of the manufactured PHC pipe pile meets various requirements of the standard, and very wide application prospects are achieved.

The invention relates to a flame-retardant elastic rubber-plastic wave thermal insulation material and a preparation method thereof. The flame-retardant elastic rubber-plastic wave thermal insulationmaterial comprises the following raw materials: an ethylene propylene diene monomer, butadiene styrene rubber, high styrene resin, dioctyl sebacate, a vulcanization accelerator, an active agent, an anti-scorching agent, a foaming agent, sulfur, an antioxidant, a light stabilizer and a composite flame retardant. Ethylene-propylene-diene monomer and a composite flame retardant are added; no polar substituent exists in the molecular structure of the ethylene propylene diene monomer; the molecular cohesion is low, a molecular chain can keep flexibility in a relatively wide range, and the flexibility and elasticity of the material are improved; by adding the composite flame retardant, heat can be absorbed to generate a thermal decomposition reaction, the temperature in a condensed phase can bereduced, the thermal decomposition speed of the material can be reduced, and a large number of active hydroxyl free radicals generated in the combustion process can be isolated, so that the flame retardant effect is achieved, and the elasticity and flame retardant property of rubber and plastic products are effectively improved.

The invention provides an antibacterial acid-resistant plastic glove material, belonging to the technical field of plastics. The antibacterial acid-resistant plastic glove material is prepared from, by weight, 40 to 45 parts of PVC powder, 20 to 25 parts of synthetic resin, 0.2 to 0.8 part of nanometer silver-loaded antiseptic, 10 to 15 parts of liquid nitrile rubber, 10 to 15 parts of epoxy natural rubber, 3 to 8 parts of a plasticizer, 0.5 to 2.8 parts of a stabilizing agent and 0.6 to 0.8 part of a catalyst. A plastic glove prepared from the material has good elasticity; the formula of the raw materials is simple and reasonable; and the prepared has good physical properties, wear resistance and acid resistance, can guarantee physical and mechanical properties of the plastic glove, is low in energy consumption and cost, high in production efficiency, good in antibacterial effect and long in service life.

The invention discloses ecological concrete containing nutritional base material particles and a preparation method of the ecological concrete. The ecological concrete comprises the following raw materials in parts by weight: 0-15 parts of fine aggregate; 50 to 85 parts of coarse aggregate; 5-35 parts of nutritional base material particles; 15 to 25 parts of cement; 0-8 parts of fly ash; 0.3 to 0.5 part of a water reducing agent; 4 to 10 parts of water; nutrition base material particles are doped into the ecological concrete, the strength and the erosion resistance of the ecological concrete can be improved under the condition that the porosity among ecological concrete aggregates is small, meanwhile, the ecological concrete has the good fertilizer efficiency slow release performance, the good water retention and soil moisture preservation capacity and the suitable internal alkaline environment, and the ecological concrete has the good water retention and soil moisture preservation performance. The purposes of long-term plant attachment growth and ecological environment improvement in a small-pore environment are achieved.

The invention relates to a wear-resistant heatproof material used for plastic runway, which belongs to the technical field of plastic cement. The wear-resistant heatproof material comprises the following components in parts by weight: 20-25 parts of natural rubber, 36-56 parts of ultrahigh molecular weight polyethylene, 20-25 parts of glass fiber, 40-50 parts of white carbon black, 0.5-1.5 parts of a stabilizing agent, 0.5-0.8 parts of a fluorescent agent, 1-3 parts of an antioxidant, 0.5-1 part of a dispersant, and 2-4 parts of a vulcanizing agent. The raw materials formula is simple and reasonable, and the physical properties of the product are good. A preparation method has the advantages of simple and reasonable process, low energy consumption and high production efficiency, the wear-resistant heatproof material has wear resistant and heatproof characteristics, can effectively guarantee the physical and mechanical capability of the plastic runway, and has the advantages of low cost and long usage life.

The invention discloses a preparation method for preparing multi-element synergic flame-retarding polymer polyalcohol of polyurethane and application and belongs to the technical field of high polymer chemistry, reaction type fire retardants and building heat-preservation materials. The multi-element synergic flame-retarding polyalcohol is prepared by taking phosphorus pentoxide, water, epoxy chloropropane, isocyanuric acid, melamine and tetrabromophthalic anhydride to react. The multi-element synergic flame-retarding polymer polyalcohol is used for preparing a flame-retarding polyurethane foam material.

The invention provides a manufacturing technology for an autoclaving-free pole. The specific machining technology comprises the following steps that one, prestressed steel bars and screw-thread steelare machined; two, a steel bar framework is manufactured; three, a concrete mixture is manufactured; four, mold closing and formation of the autoclaving-free pole are conducted; five, natural curing is conducted; six, mold removing is conducted; and seven, finished product inspection is conducted. The manufacturing technology for the autoclaving-free pole has the beneficial effects that by means of improvement of raw material quality, optimization of mixing proportion and adoption of an efficient water reducing agent, a large amount of energy consumption is saved on the premise that physical and mechanical properties, durability and production time of the pole are guaranteed; a cost ranging from 30 rmb to 60 rmb can be saved by each pole; production cost is reduced greatly; the history ofhigh energy consumption of the pole is changed completely; a novel breakthrough of the pole is achieved; the concrete of the autoclaving-free pole is high in durability such as chloride corrosion resistance property, freezing resistance and the like and high in latter strength; a strength loss of 17% of steam curing is avoided; the autoclaving-free pole is artistic in appearance; a non-pulp-pouring technology is adopted; meanwhile, numerous troubles of the remaining pulp are avoided; and the manufacturing technology is environmentally friendly.

The invention belongs to the field of wood adhesives and particularly relates to a method for lowering adhesive consumption of melamine-modified urea resin wood adhesive. The method comprises steps of preparing adhesive, mixing adhesive, applying adhesive and thermally pressing. The method is characterized in that adhesive consumption of the melamine-modified urea resin wood adhesive is lowered by a diluting method, wherein the diluting method comprises the steps of adding water to dilute, and is used for gluing of a high-density fiber board and a shaving board. The melamine-modified urea resin wood adhesive contains over 5% by weight of melamine and is good in water solubility. The diluting process can be completed in an adhesive-preparing rear stage or an adhesive mixing stage, wherein water adding amount is 0.1-2 times the weight of the adhesive, and then high-speed stirring is carried out. The method disclosed by the invention has the advantages that the adhesive consumption is lowered by 9%-18%, formaldehyde emission is over E1, and physical and mechanical performances of the board are also ensured, and is simple and convenient to use.

The invention belongs to the technical field of macromolecular material modification, and in particular relates to a modified PP (polypropylene) foaming enhanced material and a preparation method thereof. The modified PP foaming enhanced material consists of modified PP particles and foamed masterbatches, wherein the modified PP particles consist of PP, an inorganic mineral filling agent, a toughening agent, short glass fibers, an antioxidant 1010 and a surfactant; and the foamed masterbatches consist of EVA, talcum powder, a foaming agent, a foaming promoter, a crosslinking agent, an assistant crosslinking agent and an antioxidant 1010. The PP is enhanced and modified and then is subjected to chemical foaming, so that the prepared PP foamed material has low density, also has excellent tensile strength, bending strength and impact strength, can be used for replacing parts such as a door plate and an instrument desk on an automobile prepared by non-foamed PP at present, and can achieve the aims of reducing weight, insulating heat, reducing noise and the like.

The invention discloses a non-steam-curing production process for a telegraph pole. The production process is as follows: material and equipment preparation, prestressed steel processing, steel reinforcement framework production, concrete preparation, material layout, mold closing, centrifugal molding, hoisting, pool entering, curing and demolding. The non-steam-curing production process has the beneficial effects that WPC-600 polycarboxylate serving as a high-performance water reducer is adopted, so that the physical and mechanical properties of the telegraph pole are guaranteed; two ends areplugged without mortar discharging, so that a great deal of cement mortar does not run off; wastes are sufficiently utilized, and top diameters are plugged, so that the manpower is saved, pollution is thoroughly solved, and the novel process breakthrough of the telegraph pole is realized; prestressed tensioning is adopted, and the tensioning sequence is realized by adopting a symmetric and mutually-staggered tensioning method, so that the phenomena of bending, cracking and prestressed reinforcement breaking of the telegraph pole due to overhigh eccentric pressure generated in a tensioning process are avoided; and due to the adoption of the centrifugal molding, centrifugal sudden increment is overcome, the internal delamination is reduced, and the compactness of a non-steam-cured telegraphpole can be favorably improved.