4results about How to "Low composition" patented technology

The invention discloses a polymer modified recycled aggregate concrete material which comprises the following components in parts by mass: 70-90 parts of modified recycled aggregate B; 0-30 parts of cement; 1-3 parts of steel fiber; wherein the modified recycled aggregate B is obtained by modifying a recycled aggregate A through polymer particles; compared with the prior art, after the recycled aggregate A is modified and reinforced by the polymer particles, the strength and toughness of the recycled aggregate A are improved, the strength and toughness of a matrix phase cement-based material are further improved by adding the steel fibers, and integral reinforcement is formed under the condition that the polymer particles penetrate through a three-dimensional network, so that the strength and toughness of the recycled concrete are remarkably improved.

The invention belongs to the technical field of fiber impregnating compounds, and relates to an Al-MOF / polysiloxane composite impregnating compound special for basalt fiber and a preparation method thereof.The preparation method comprises the steps that an ethanol water solution serves as a solvent, Al-MOF nanoparticles are added, ultrasonic dispersion is conducted, and Al-MOF suspension liquid is prepared; adding a water-based polysiloxane solution into the Al-MOF suspension, and carrying out ultrasonic dispersion, so as to obtain the special Al-MOF / polysiloxane composite impregnating compound for the basalt fibers; the preparation method is scientific in principle, simple to operate, efficient, low in cost, few in components and simple in sizing process. After the basalt fiber is subjected to sizing treatment through the impregnating compound, a topological structure similar to basalt components can be constructed on the surface of the basalt fiber, the fiber is endowed with excellent thermal mechanical performance and surface amphiphobic performance, and the high-temperature-resistant, anti-pollution, waterproof and self-cleaning functions of the textile type basalt fiber in the fields of special-purpose clothes and hot filtering devices can be achieved. The method has great application potential and is suitable for large-scale popularization.

The utility model discloses a kind of small passenger car universal transmission joint three-pin shaft, including three-pin frame and the pin shaft being set on the outer wall of three-pin frame, the shaft neck position of three-pin frame corresponding pin shaft is provided with multi-stage boss, the end of pin shaft is provided with blind hole, bearing ring is installed to the outside of pin shaft;The surface of each group pin shaft and the inner wall of bearing ring are respectively provided with central raceway and two side edge raceways along circumference direction.The utility model is set up multi-stage boss, reduces stress concentration, improves connection structure strength, increases fatigue life;Blind hole can be set, and weight can be reduced, so as to reduce abrasion;Bearing ring adopts integrated bearing design, structure is simpler, the number of parts composition is less, improve reliability, and reduce cost;The design of net pattern lubricating oil flow channel is favorable to lubricating oil flow, realizes self-lubricating effect, improves lubricating effect by, further reduce abrasion to improve life;Overall reliability can be improved.

The invention relates to the technical field of catalysts, in particular to a preparation method of a weathered coal-based potassium iron humate fire coal catalyst, which comprises the following steps of: adding the following components in percentage by mass into a reactor: 4-8% of weathered coal, 1-2% of potassium hydroxide, 0.01-0.05% of ferrous sulfate, 0.3-0.5% of ferric sulfate and the balance of water, stirring and reacting for 2 hours, centrifuging, reserving supernate, adjusting the pH value to 1.0-2.0, and filtering to obtain the weathered coal-based potassium iron humate fire coal catalyst. Filtering and drying to obtain the potassium iron humate. And then preparing the weathered coal-based potassium iron humate fire coal catalyst from 28%-32% of potassium iron humate, 4%-6% of potassium chloride, 2%-4% of calcium chloride, 1%-3% of nickel nitrate hexahydrate, 4%-6% of sodium nitrate, 0.4%-0.6% of copper nitrate and the balance of water. The addition amount of the catalyst is 0.05-0.15% of the mass of raw coal, the flue gas emission sulfur of fire coal is reduced, and the combustion efficiency is improved.