98results about How to "Solving Segregation Problems" patented technology

The invention relates to a pumping agent and application thereof, belonging to the field of construction materials. The invention aims to provide the pumping agent and the application thereof. The pumping agent provided by the invention comprises 175-325 parts by weight of polycarboxylic acid water reducing agent, 10-60 parts by weight of retarder, 10-50 parts by weight of water retention agent, 0.1-1.5 parts by weight of air entraining agent and 563.5-804.9 parts by weight of water. The invention also relates to the application of the pumping agent in C15-C70 concrete. The addition amount of the pumping agent accounts for 0.9-2.2 wt% of a cementing material in the concrete. The pumping agent prepared by the invention has the advantages of favorable material adaptability, low addition amount, high water reducing rate, low air content, high concrete strength contribution and the like, mainly solves the problem that the polycarboxylic acid pumping agent is easily subjected to over-addition in practical situations, can effectively prevent the defects of the concrete such as weepage, isolation and the like, and ensures the quality of the concrete.

The invention discloses a preparation method of a thickener used for self-compact concrete. The method comprises the following steps: 1, weighing 2-acrylamide-2-methylpropanesulfonic acid and acrylic acid in proportion, processing to prepare an aqueous solution, and adjusting the pH value to 6.5-7.0; 2, adding a prepared monomer acrylamide solution with the concentration of 25-35% while stirring, uniformly stirring, dumping the obtained mixed solution into a flask, carrying out constant temperature water bath, and introducing nitrogen for protection; and 3, adding an initiator in a dropwise manner when the reaction temperature rises to 30-40DEG C, carrying out heat insulation at 40DEG C, carrying out a stirring reaction for about 1.5-2h, stopping the introduction of nitrogen when reactants are a viscous liquid, and carrying out constant temperature slaking for a period of time to obtain a white transparent colloid which is the thickener. The thickener obtained in the invention is used for preparing the self-compact concrete, has a good water solubility and a good thickening effect, can effectively improve the plastic viscosity of the self-compact concrete, and solves the water segregation and separation problems of the self-compact concrete.

The invention provides a hot-mix cold-lay rubber asphalt mixture. The mixture is characterized in that: the mixture comprises rubber asphalt and an aggregate; the aggregate comprises a coarse aggregate, a fine aggregate and ore powder; and the rubber asphalt comprises the following components, by weight, 1.5-10% of rubber powder, 5-15% of solvent naphtha, 0.1-5% of a silane coupling agent, 2-5% of a thermoplastic elastomer, and the balance petroleum asphalt. The silane coupling agent, which is added to rubber powder modified asphalt in the invention, allows a separation problem of the rubber powder and asphalt to be effectively solved. The obtained hot-mix cold-lay rubber powder modified asphalt mixture can keep a good loosened state for several months and all performances are stable in normal temperature conditions.

The invention provides high-fluidity pumping ceramsite concrete and a preparation method thereof. A formula of the concrete comprises cement, coal ash, water, fine aggregate, limestone flour, pumping aid, ceramsites, ceramic sand, redispersable emulsion and hydroxypropyl methyl cellulose. The method comprises the following steps: reasonably selecting respective raw materials and usage thereof according to a unit weight of concrete to be prepared, soaking the ceramsites to a saturated water absorption state in advance, then mixing with other raw materials, and stirring to prepare the ceramsite concrete. By controlling the grain size of the ceramsites and a fineness modulus of the fine aggregate, the redispersable emulsion and hydroxypropyl methyl cellulose are cooperatively added to promote the cementation of the cementing materials such as the cement, the coal ash and the limestone flour with the ceramsites, and the cohesiveness and water retaining property of the concrete are increased, and the problems of easy floating, layering and separation of the ceramsites in the ceramsite concrete are effectively solved, moreover, separation and layering of the ceramsites can be effectively avoided by using the ceramsite concrete produced according to the invention, and slump loss in a material transporting and waiting process is obviously reduced.

The invention relates to a bulk material high discharge system, which is used for discharging dry bulk material with certain flowability into a preset storage bin from a high position of tens of meters. The system comprises a mixer discharge hopper (1), a horizontal screw conveyor (2), a vertical bucket elevator (3), a transition bin (5), a cone-shaped transition hopper (9), a bulk bin (4) and a discharge pipe (10), wherein, the mixer discharge hopper (1) is arranged at the upper part of the horizontal screw conveyor (2), the vertical bucket elevator (3) is arranged on the rear side of the horizontal screw conveyor (2), the transition bin (5) is arranged on the rear side of a discharge port at the upper part of the vertical bucket elevator (3), the cone-shaped transition hopper (9) is arranged at the bottom part of the transition bin (5), the discharge pipe (10) is arranged in the bulk bin (4), the upper end of the discharge pipe (10) is connected with the discharge port of the cone-shaped transition hopper (9), the lower end is arranged in the bulk bin (4), and a plurality of discharge holes (10.1) are laterally arranged on the discharge pipe (10). The system can limit and eliminate the free falling body state of various materials, thereby effectively reducing and eliminating segregation.

The invention relates to high-concentration crumb rubber modified asphalt and a preparation method thereof, and belongs to the field of modified asphalt for road construction. Aiming at the problems that the dosage of crumb rubber is not high enough in the traditional crumb rubber modified asphalt technology, and secondary pollution and high energy consumption exist in the wet method modification, the invention adopts a crumb rubber pretreatment method to prepare modified crumb rubber, and then the modified crumb rubber and a reinforcing agent are mixed with asphalt to prepare the high-concentration crumb rubber modified asphalt with a high-speed shearing method, and the filler content of the modified crumb rubber can reach more than 50 parts. The crumb rubber modified asphalt is simple in preparation technology, high in the dosage of the crumb rubber, superior in performance and high in cost performance, and has significant social meaning and environmental protection value.

The invention relates to a method for preparing a nitrogen-kalium fertilizer with circular particles. The method comprises the following steps: (1) firstly, sulphuric acid, synthetic ammonia and washing water react to generate ammonium sulfate slurry through a tube-type reactor; the molar ratio of the sulphuric acid to the synthetic ammonia is between 1.8 to 1 and 2.2 to 1; the volume ratio of the washing water to the sulphuric acid is between 1 to 3 and 1 to 1; (2) the ammonium sulfate slurry generated in the step one is directly sprayed on a material of a rotary drum pelletizer for pelletization; and (3) particles formed in the step two are dried, sifted and cooled to obtain the qualified product. The method fully utilizes heat of reaction between the sulphuric acid and the synthetic ammonia and reduces energy consumption; in addition, the sulphuric acid contains nutrients of nitrogen and sulphur essential to plants, thereby improving total nutrients of the product.

The invention relates to an asphalt and SBS compatibility evaluation method based on molecular dynamics simulation, belongs to the technical field of modified asphalt compatibility, and mainly solvesthe problem that no specific and accurate method for evaluating the compatibility of SBS and asphalt exists at present. A molecular dynamics simulation method is used as a basis. The method comprises:using molecular dynamics simulation software, respectively constructing a single asphalt system unit cell model, an SBS block copolymer molecular structure model and an SBS modified asphalt blendingsystem model, respectively carrying out molecular dynamics simulation on the models, calculating to obtain solubility parameters and interaction energy, and characterizing and evaluating the compatibility of SBS and asphalt by taking the solubility parameters and interaction energy as indexes. The compatibility evaluation method disclosed by the invention provides an idea for researching the compatibility mechanism of the SBS and the asphalt. The method provides guidance for the establishment of a modified asphalt compatibility evaluation system and an evaluation system thereof, provides a theoretical basis for the formula of the SBS modifier, and has very important significance for solving the problem of asphalt segregation and improving the stability of the modified asphalt.

The invention relates to a preparation method of a direct-stirring type SBS (styrene-butadiene-styrene) asphalt modifier and a preparation method of an asphalt mixture. The preparation method comprises the following steps of respectively metering 4303 star-shaped SBS, 1301 linear SBS and lubricating oil, feeding into a mixer according to a ratio, uniformly mixing, and uniformly stirring; feeding petroleum resin and calcium carbonate into the mixer, and uniformly stirring; feeding the mixture into a double-screw extruder, enabling the mixture to form a melting mixture at high temperature, and enabling the double-screw extruder to extrude the melting mixture after the forced shearing, extrusion, dispersing and kneading are continuously maintained; cooling the melting mixture extruded by thedouble-screw extruder by a water tank, enabling a pelletizer to cut into granules, enabling an air dryer to dry, and packaging. The preparation method has the advantages that the production technologyof the modified asphalt is simplified, the production quality of the mixture is favorably controlled, the construction quality of a road pavement is ensured, the use property of the road is improved,the service life of the road is prolonged, the pollution to the environment is decreased, and the engineering investment is reduced.

The invention provides a concrete column pouring method. The concrete column pouring method comprises the following steps of formwork plugging: mortar is adopted for conducting crack plugging treatment on the outer side of the bottom of a column formwork erected on the periphery of a column; tube stringing: binding a soft tube on a dust conveying hose of the concrete pump truck, and placing the soft tube at the central part of the column, so as to output column concrete through the rubber hose; and pouring: a layer of mortar is poured at the bottom of the column, pouring and vibrating are carried out on the column concrete layer by layer above the mortar layer, and the vibrating bar and the soft tube bound in the tube stringing step are lifted while pouring the column concrete in the pouring process. According to the method, the root rotting problem of the column is solved by adopting a mortar pre-pouring method, the segregation problem caused by large free fall of the column concreteis avoided by additionally adopting the tube stringing method, and the quality defects of concrete honeycombs, pitted surfaces and incompact vibration are further overcome by multi-point layered vibration during pouring.

The invention discloses a stirring cylinder rotating speed self-adaptive control device, method and equipment and a storage medium. The real-time quality state of concrete in a stirring cylinder is sensed through newly-added rotating blades and a rotating shaft, the real-time quality state is obtained by collecting parameters such as the torque and the rotating speed of the newly-added rotating blades through a torque and rotating speed collecting module and then converting the parameters through a conversion relation, then the segregation state of the concrete in the stirring cylinder is judged through the quality state, self-adaptive adjustment of the rotating speed of the stirring cylinder is achieved through a rotating speed adjusting module according to the segregation state, the segregation problem of the concrete is prevented, the quality of the concrete is improved, meanwhile, under the condition that the quality of the concrete is stable, the rotating speed of the stirring cylinder is properly decreased, fuel consumption is reduced, and mechanical abrasion of a hydraulic system and mechanical parts is reduced.

The invention relates to a preparation method of an environment-friendly gelling material for mine pit filling. Fly ash, colored ore slag powder, red mud, cement, quick lime, gypsum powder and vesuvianite powder are mixed and are subjected to ball grinding into blank powder; the blank powder is subjected to calcination and ball grinding to obtain mixed powder; the mixed powder, sodium silicate andfoaming agents are mixed and stirred uniformly; the environment-friendly gelling material for mine pit filling is prepared. The prepared gelling material consumes a large number of solid wastes; theenergy is saved; the environment is protected; the technical defects of poor conveying, separation, draining, water discharging and filling body early-period compressive strength are overcome; the water content is high; the slurry is not separated; the dehydration is not needed; the pumpability is high; the slurry concentration can be changed in a range being 30 percent to 70 percent; after filling for 2h, the compressive strength can reach 3.3MPa; after 24h, the compressive strength can reach 5.9MPa; the final compressive strength can reach 11.9MPa.

The invention discloses thermal-insulating mortar proportioning and stirring equipment, belonging to the field of mixing and stirring production equipment for a construction thermal-insulating material. The thermal-insulating mortar proportioning and stirring equipment comprises two feeding hoppers, two lifting machines, an upper material cabin, a lower material cabin, two metering mixers and a packaging machine. The thermal-insulating mortar proportioning and stirring equipment is characterized in that the two feeding hoppers, the two lifting machines and the packaging machine are fixedly arranged on a foundation; the two material cabins and the two metering mixers are supported and fixed on the foundation through metal pillars; the two feeding hoppers are respectively mounted at the feeding openings of the bottoms of the two lifting machines; one metering mixer is connected with the front parts of the feeding hoppers; the two lifting machines are connected with the cylindrical upper material cabin through articulated chutes; a spiral mixer is mounted between the upper material chamber and a funnel-shaped lower material cabin; a discharging opening of the lower material cabin is connected with the other metering mixer through a hose; and discharging openings of the metering mixers are connected with the packaging machine. The thermal-insulating mortar proportioning and stirring equipment is used for sufficiently and uniformly mixing a light material with powder, and accurately weighting, so that the problem in the traditional thermal-insulating mortar assembly line that the light material is easy to crack, and the powder and the light material are separated can be solved.

The invention discloses an asphalt mixture modifying agent and a production method and the application thereof. The asphalt mixture modifying agent comprises components of 60 to 90 parts of polyethylene A, 0 to 30 parts of polyethylene B, 0.1 to 0.6 part of antioxidant A, 0.1 to 0.6 part of antioxidant B, 0.2 to 0.8 part of weather resistance agent, 0.4 to 1.2 parts of lubricant A, 3 to 12 parts of lubricant B and 0.8 part of toner.

The invention discloses wear-resistant spiral blades for a concrete mixing tank. A tank body is divided into a front cone, a middle cylinder and a rear cone. A pair of spiral blades are designed in an isometric logarithmic spiral line; both thread pitch and spiral angles are different; cross sections of the spiral blades are in a unique concave shape to realize a three-dimensional mixing function; the front cone is provided with mixing blades; the mixing blades are fixed on the rod member in a manner of smaller than the spiral angle of the blade; two ends of a rod member are connected to two adjacent blades respectively; the rear cone is provided with a central cylinder; one end of the central cylinder is in a straight tube shape and fixedly connected to a tank opening; the other end of the central cylinder is in a notched horn shape; the horn surface is provided with through holes in different apertures, so as to facilitate smooth material feeding; the tail end of the blade is fixedly connected to an outer wall of the central cylinder; an inner wall of the tank opening of the rear cone is fixedly connected to a streamlined auxiliary vane for accelerating material-discharging speed and material-discharging shunting effect. The blades provided by the invention have the three-dimensional mixing function, have good mixing performance, are fast and smooth in material feeding and discharging, are firm and wear-resistant, and prolong a service life.

The invention relates to the spreading machine field, which discloses a spreading machine, and a method and device for controlling material level of the spreading machine. The method includes detecting a material level of the spreading machine; setting control parameters of an actuating mechanism according to parameters of the actuating mechanism of the spreading machine; calculating a practical productivity coefficient according to the practical productivity and theoretical productivity of the spreading machine; and controlling a driving command of the actuating mechanism according to the material level, the control parameters and the practical productivity coefficient. Therefore, according to the spreading machine, and method and device provided by the invention, the problems of relatively large variation of a conveying scraper and a distributing screw and material segregation caused by overhigh speed during the conveying process of asphalt mixed material can be solved.

The invention relates to a bulk material high discharge system, which is used for discharging dry bulk material with certain flowability into a preset storage bin from a high position of tens of meters. The system comprises a transition bin (5), a cone-shaped transition hopper (9), a bulk bin (4) and a discharge pipe (10), the cone-shaped transition hopper (9) is arranged at the bottom part of the transition bin (5), the bulk bin (4) is arranged at the lower part of the cone-shaped transition hopper (9), the cone-shaped transition hopper (9) is arranged in the bulk bin (4), the upper end of the discharge pipe (10) is connected with the discharge port of the cone-shaped transition hopper (9), the lower end is arranged in the bulk bin (4), and a plurality of discharge holes (10.1) are laterally arranged on the discharge pipe (10). The system can limit and eliminate the free falling body state of various materials, thereby effectively reducing and eliminating segregation.

The invention discloses a fishbone-shaped string barrel suitable for deep foundation pit concrete warehousing pouring. The fishbone-shaped string barrel comprises multiple sections of string barrel bodies which are sequentially connected end-to-end into a whole. A plurality of groups of fishbone-shaped sliding grooves are formed in the inner wall of each section of the string barrel body in the form of spiral extending at intervals. Each fishbone-shaped sliding groove is of a streamline form space curved surface structure and extends downwards. The fishbone-shaped string barrel can comprehensively adapt to foundation pit environmental conditions such as narrow, high and steep, deep and narrow foundation pits. The fishbone-shaped string barrel is simple in structure, low in cost and rapid in construction.

The invention discloses a storage, transportation and mixed preparation method for building mortar and a special device thereof. The method comprises the following steps of: firstly, dividing the raw materials of dry-mixed mortar into a cement mixed material and sand, and transporting the two raw materials to a construction site by virtue of mutually independent containers; and then, at the construction site, respectively weighing a raw material A and a raw material B, and carrying out dry mixing and wet mixing on the raw material A and the raw material B. The method and the special device overcome the defect of high energy consumption due to the baking of the sand in the existing manufacturing and using processes of the mortar, save energy resources, solve the separation problem in the existing production and transportation processes of the mortar, and improve the product quality on the premise that the energy resources are saved.

The invention relates to the technical field of cooling tower construction, and discloses a construction method for pouring a circular herringbone column of a cooling tower in a segmented mode. The method comprises the following operation steps that 1, construction preparation is carried out, specifically, a design construction drawing is familiarized, safe technical disclosure is carried out on construction workers, and meanwhile preparation work of materials, machines, tools and equipment is carried out. According to the construction method for pouring the circular herringbone column of thecooling tower in the segmented mode, a UPVC guide pipe discharging method is adopted in herringbone column concrete pouring construction, the problem that mixtures are separated due to the fact that the free falling height of concrete is large is mainly solved, a column top mold is covered and reinforced in a segmented mode, observation and manual auxiliary vibration can be convenient, two vibrating rods are adopted to work at the same time, and the problem that the use safety and durability of the structure are affected due to the fact that concrete is vibrated uncompactly can be effectivelysolved; and compared with a traditional pouring method, the construction method is simple in construction and easy to operate, and it can be effectively guaranteed that herringbone column concrete achieves the effect of solid inside and smooth outside.