47results about How to "Improve anti-sedimentation effect" patented technology

The invention discloses a bridge head structure for controlling bump at bridge head. The bridge head structure comprises a bridge abutment, a beam slab, a subgrade, a pavement structure layer, a bridge head transition slab and a bridge deck layer, wherein the pavement structure layer comprises a subbase layer, a base layer and a surface layer from bottom to top; the bridge head transition slab is arranged between the subgrade and the subbase layer, and one end of the bridge head transition slab is lapped on the bracket of the bridge abutment; a contraction joint is formed between the base layer and the back of the bridge abutment, and an expansion joint is formed between the back of the bridge abutment and the beam slab. The bridge head transition slab of the bridge head structure is arranged underneath so that the subgrade cavity phenomenon under the transition slab of the end near the abutment can be eliminated; as a result, differential settlement between the subgrade and the bridge can be effectively adjusted, bump at the joint of the bridge abutment and the embankment and secondary bump at the far end of the transition slab can be avoided, the reflection crack of the pavement can be prevented and controlled, the integrity of the pavement is good and the construction operation is simple and convenient; the service life of each of the pavement, the bridge head transition slab, the expansion joint and the bridge is prolonged, and therefore, an effective technical scheme for comprehensively controlling bump at bridge head is provided.

The invention provides a preparation method of an iron oxide particle, which comprises the steps of: firstly, mixing an iron salt, an alkali compound and a dispersing agent, and reacting to obtain nano iron oxide hydroxide; carrying out silicon dioxide coating on the nano iron oxide hydroxide, then thermally treating to ensure that the iron oxide hydroxide is subjected to de-hydroxylation to obtain silicon dioxide coated iron oxide; and finally, ultrasonically treating the silicon dioxide coated iron oxide in the alkali compound to obtain the nano hollow iron oxide particle. Because the iron oxide particle is of a hollow structure, the average density of the iron oxide particle is smaller due to the hollow structure inside the iron oxide particle, and therefore, the anti-precipitation performance of the iron oxide particle in base oil is improved; and then, the iron oxide particle is a nano particle, and the anti-participation performance of electrorheological fluid prepared by adopting the iron oxide particle is more excellent than that of the electrorheological fluid prepared by adopting a common dispersion phase particle.

The invention discloses anti-precipitation modified silicon dioxide, a preparation method thereof and an application of the modified silicon dioxide, and belongs to the field of coating additives. Silicon dioxide is modified by performance additives to prepare the modified silicon dioxide, the average particle size of the modified silicon dioxide is 1-10 micrometers, and the performance additivescomprise anti-precipitation performance additives prepared from one or more of acrylic polymer, polyacrylate copolymer, polybasic carboxylic polymer, polyether modified organic siloxane, aralkyl modified organic siloxane, organic silicon modified polyacrylic ester, high polymer polyacrylic ester containing efficient anchor groups, segmented copolymer containing pigment affine groups and modified urea. The modified silicon dioxide can meet the requirements of waterborne coatings and oily coatings for application of the storage performance of the silicon dioxide, precipitation in the long-term storage process is avoided, and final application effects cannot be affected.

The invention discloses a closestool cover coating capable of purifying the air. The closestool cover coating comprises raw materials in parts by weight: 35-45 parts of aqueous acrylic resin, 20-30 parts of aqueous polyurethane resin, 20-30 parts of aqueous alkyd resin, 10-15 parts of modified medical stone powder, 5-9 parts of diatomite, 6-9 parts of calcinated kaolin, 2-4 parts of tourmaline powder, 1-3 parts of hexacyclic stone powder, 3-4 parts of gas-phase silicon oxide, 1-2 parts of tween-60, 2-3 parts of zinc stearate, 2-4 parts of polyethyleneglycol , 1-3 parts of methyl hydroxypropyl cellulose, 1-3 parts of a leveling agent, 0.5-2 parts of a de-foaming agent, 2-4 parts of a preservative and 2-4 parts of a drier. The closestool cover coating capable of purifying the air, disclosed by the invention, has excellent ability to absorb stink substances in a washing room, can release negative ions to realize the effect of air purification, and has excellent weather resistance stability and flexibility.

The invention discloses a BRT station heavy traffic road section pavement structure and a construction method. The pavement structure is composed of a high-viscosity high-modulus skeleton dense type mixture upper surface layer, a modified asphalt macadam connecting layer, a rigid-flexible composite asphalt mixture middle surface layer, and a modified asphalt suspension dense type mixture lower surface layer. The mixture upper surface layer is composed of fine-particle-size aggregate, ultrahigh-viscosity modified asphalt, a fiber stabilizer, a high-modulus additive and the like, and the anti-loosening and anti-deformation capacity of the surface layer is improved; the connecting layer is composed of aggregate with a single particle size and modified asphalt; the middle surface layer is formed by pouring mixed base slurry into a matrix asphalt mixture, so that the overall bearing capacity of the pavement layer is improved; and the mixture lower surface layer is composed of medium-grain or coarse-grain aggregate and modified asphalt, and the stability of the pavement layer is improved. The pavement structure is high in overall strength, strong in rut deformation resistance, good in durability and excellent in surface layer wear resistance and slide resistance, and can effectively improve the pavement quality and prolong the service life of the heavy traffic road section of a BRT station.

The invention provides an ultrasonic microwave extraction system for Chinese medicinal materials. The ultrasonic microwave extraction system is provided with a coordinated regulation and control device, and the coordinated regulation and control device is provided with a first alarm device, a second alarm device and a third alarm device. The coordinated regulation and control device controls a microwave introduction device to introduce microwaves, the first alarm device sends an alarm signal to the coordinated regulation and control device after a certain time, and the coordinated regulation and control device controls an ultrasonic introduction device to introduce ultrasonic waves; after a certain time, the second alarm device sends an alarm signal to the coordinated regulation and control device, and the coordinated regulation and control device controls the microwave introduction device and the ultrasonic induction device to change the operating power, so that the operating power ofthe microwave introduction device and the ultrasonic induction device is lower than initial power of the microwave introduction device and the ultrasonic induction device, respectively; and the thirdalarm device sends an alarm signal to the coordinated regulation and control device after the microwave introduction device and the ultrasonic introduction device operate for a certain period of timeunder the condition of the changed operating power, and the coordinated regulation and control device firstly controls the microwave introduction device to stop working, and then controls the ultrasonic introduction device to stop working.

The invention discloses an anti-precipitating device of a water-coal-slurry storage tank. The anti-precipitating device is characterized by comprising a tank body, a plurality of vertical type stirrers, a blower, side stirrers and a turbulator, wherein the tank body is provided with a tank cover and a plurality of slurry outlets; the vertical type stirrers are uniformly distributed in the tank body along the center of the tank body; the vertical type stirrers are fixedly arranged between the bottom wall of the tank body and the tank cover; the blower comprises a main through pipeline which is arranged outside the side wall of the bottom of the tank body, a plurality of branch pipes, a plurality of valves and an air compressor; each branch pipe is provided with an independent valve; the main through pipeline is connected with the air compressor; and the air compressor is used for blowing compressed air into the tank body through the main through pipeline and the branch pipes. The anti-precipitating device radically solves the anti-precipitating problem of the water-coal-slurry storage tank, so that water-coal-slurry can have fluidity like water so as to be convenient for long-distance transportation; and the anti-precipitating device has anti-precipitating effect better than that of other ways, can effectively solve potential safety hazards in operation of the storage tank, and can relieve logistical clearing pressure of enterprises.