42results about How to "Optimize mix ratio" patented technology

The invention discloses early-strength concrete for non-steam autoclaved PHC pipe piles. The concrete/m3 is prepared from the following raw materials: 360-477kg of Portland cement, 50-160kg of granulated blast furnace slag powder, 640-720kg of fine aggregates with fineness modulus of 2.5-3.0, 1120-1200kg of coarse aggregates with maximum grain size being not more than 25mm, 10-16kg of anhydrous gypsum, 4-7kg of high efficiency water reducing agents and 130-145kg of water. The concrete is used for preparing the PHC pipe piles and can meet the compression strength requirement of C80 concrete for non-steam autoclaved PHC pipe piles in a shorter time.

The invention discloses a non-linear optimization method for mix proportion of concrete. The non-linear optimization method is carried out according to the following steps: firstly, establishing a neural network model for predicting the performance of concrete; secondly, determining the target and constraint conditions of an optimization model for mix proportion; thirdly, establishing the optimization model for mix proportion by virtue of a particle swarm optimization algorithm; and fourthly, carrying out particle reduction, namely, respectively reducing optimal fitness values obtained by calculation and positions of the optimal fitness values into the lowest cost value and the corresponding mix proportion of concrete and completing the method. The non-linear optimization method has the beneficial effects that (1) the non-linear prediction model of the performance of concrete and the non-linear optimization model of the mix proportion are established; (2) the problem of over-fitting control in the non-linear prediction of the performance of concrete is solved; and (3) the global optimization of the mix proportion of concrete is achieved and the optimization efficiency is relatively high.

The invention provides a preparation method of ultra-high-strength steel fiber reinforced concrete for super-high pumping. According to the method, the ultra-high-strength steel fiber reinforced concrete with the strength grade of C150 is prepared by changing proportion of a cementing material and a feeding sequence and can be prepared with conventional production process through a mixing plant, and the problem that concrete with the strength grade of C150 or higher cannot be produced with the conventional process is solved. Common Portland cement as well as coarse and fine aggregate is adopted, and the cement is prepared through technological approaches such as reduction of a water-binder ratio, density enhancement and the like under double-doping actions of a polycarboxylate superplasticizer and a superfine mineral admixture. The prepared concrete has good working performance, the slump flow is 670-700 mm, and loss is basically avoided within 2 h; the viscosity is low, and rewinding time is 3.2-4.2 s; 28 d compressive strength reaches the strength grade of C150, and requirements for pumping construction of super high-rise buildings with height of 600 m or higher can be met.

The invention discloses a waterproof flexible cement-based dry-mixed overlay repairing mortar. A dry mixed material includes, by weight, 22-39 parts of ordinary Portland cement, 2-18 parts of fly ash, 0.9-2.1 parts of rubber powder, 0.05-0.45 parts of cellulose ether, 0.03-0.3 parts of a defoamer, 0.02-0.15 parts of an expanding agent, and 40-75 parts of natural sand. During usage, water accounting for 10-20% of the total mass of the mortar is added to the dry mixed material to obtain the waterproof flexible cement-based dry-mixed overlay repairing mortar. The fly ash refines the internal structure of the cement-based repairing mortar, and by means of compounding effects of the additives, the mortar is ensured to have flexibility and anti-permeability and excellent flexural strength and compressive strength. The 3d compressive strength of the mortar is 20-30 MPa and 28 d compressive strength of the mortar is 36-45 MPa, so that the mortar can satisfy repairing strength demand of common concrete building external walls.

The invention provides lightweight high-strength waterproof concrete and a preparation method thereof, and belongs to the field of concrete. The lightweight high-strength waterproof concrete comprisesthe following components in parts by mass: 450 to 500 parts of Portland cement, 130 to 160 parts of mineral powder, 130 to 160 parts of fly ash, 70 to 80 parts of silica fume, 60 to 85 parts of glassmicro-beads, 16 to 18 parts of steel fibers, 180 to 210 parts of iron tailing sand, 350 to 400 parts of pore-sealing fly ash ceramsite, 180 to 200 parts of water, 15 to 25 parts of a water reducing agent and 4 to 5 parts of a permanent solidification liquid RMO. The pore-sealing fly ash ceramsite is prepared by a method comprising the following steps: immersing fly ash ceramsite into a mixed solution of RMO and water, pre-wetting, draining off water after 1 hour, and then carrying out coating treatment by using a mixture of Portland cement and iron tailing sand powder, so as to obtain the pore-sealing fly ash ceramsite. The concrete disclosed by the invention has the properties of light weight, high strength and water resistance.

The invention discloses a special sprayed concrete material for a tunnel high-ground-temperature dry-hot environment. The total amount of cementing materials of concrete is 400-420 kg per cubic meter;the cementing material comprises the components in percentage by weight: 83%-89% of ordinary Portland cement, 10%-15% of sulphoaluminate cement and 1%-2% of nano silicon dioxide. Steel fibers are doped according to the volume ratio of 0.4%-0.6%; a shrinkage reducing agent is doped according to 5% of the weight of the cementing material; a setting accelerator is doped according to 3-5% of the weight of the cementing material when the concrete is prepared; the ratio of glue to bone is 1:4.0-1:4.5; the water-binder ratio is not greater than 0.50. The special sprayed concrete provided by the invention has higher compressive strength and tensile strength than common shotcrete with the same strength grade under the synergistic effect of materials with a certain proportioning ratio. According todifferent dry and hot environment temperatures, the bonding strength is 2-4 times of that of common sprayed concrete, and the rebound rate is only 1/3-1/2 of that of the common sprayed concrete.

The invention belongs to the technical field of concrete materials, and in particular relates to concrete for a large tubular pile of an autoclaving-free process. Each cubic meter of preparation materials of the concrete comprise the following components: 360-450kg of cement, 30-80kg of slag powder, 10-70kg of coal ash microbeads, 10-50kg of silicon ash, 540-625kg of fine aggregate, 1200-1270kg of coarse aggregate, 1-4kg of calcium formate, 1-4kg of lithium sulfate, 6-12kg of anhydrite, 2-5kg of a water reducing agent and 115-130kg of water. A series of tests and studies on the proportioning ratio of the concrete provided by the invention are implemented, and an optimal concrete proportioning ratio which can meet the requirement of large tubular pile demolding strength and strength of C60 concrete within a relatively short time at a normal temperature can be obtained.

A method for manufacturing a white light source provides an LED light source and a semiconductor-type phosphor with (Zn, Cd)S being the host with foreign ions added thereto as luminescence centers. The LED light source emits light ranging from 495 nm about (blue-green light) to about 340 nm (ultra-violet).

The invention relates to a disinfection machine, in particular to a hospital corridor positioning track hidden disinfection machine. The aim of the invention is to provide the hospital corridor positioning track hidden disinfection machine. According to the hospital corridor positioning track hidden disinfection machine, the water storage capacity is large, workers do not need to bear loads, the spraying area is large, operation is easy, advancing and automatic returning can be conducted according to a designated route, and automatic storage can be achieved. According to the technical scheme,the hospital corridor positioning track hidden disinfection machine comprises a rack sliding groove, a disinfection rack, a motor supporting plate, a power motor and the like, wherein the rack slidinggroove is fixed to a wall body; the rear side of the disinfection rack slides on the rack sliding groove; the motor supporting plate is fixedly connected to the disinfection rack; and the power motoris fixedly connected to the motor supporting plate. According to the invention, the loads can be mechanically borne, the spraying coverage area is large, and a sprayer does not need to be manually carried on the back for disinfection, so that the working intensity of the workers is relieved, and the working efficiency is improved.

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.

In the present invention, characteristics specific to all kinds of natural mineral and metal are analyzed by a magnetic resonance analyzer. The natural mineral and metal are combined and ground into powder and made into a lead plate, ceramic and a separator of a lead-acid accumulator to produce an undulation frequency and change a molecule structure of an electrolyte, thereby accelerating an ion exchange rate, speeding up a charging rate, increasing a conversion rate, decreasing stacking of lead sulfate crystalloids, reducing a corrosion rate of a positive electrode lattice body and extending a lifetime of use of the lead-acid accumulator.

The invention provides a concrete injection system and a control method thereof. The concrete injection system comprises a concrete pump, a compressed air pump, a plurality of additive control units,an information control system and a rebound rate detection system. Each additive control unit comprises an additive pump, a control device and a flow mixing device. The control method includes the following steps of firstly, setting a parameter value in the information control system; secondly, starting pumping, conveying additives to the corresponding flow mixing devices, making concrete sequentially pass through all the flow mixing devices to be mixed with the additives, and controlling the initial flow rate and mixing time of the additives by the control devices according to an instructionof the information control system; thirdly, injecting the concrete; and fourthly, detecting the rebound rate data of the concrete and feeding back the data by the rebound rate detection system, and ifthe information control system judges that the current data is not up to standard, sending additive adjusting instructions to the control devices, and executing the process repeatedly until the datais up to standard. By means of the concrete injection system and the control method thereof, online optimization of proportions of concrete mix is realized, and construction cost is reduced.

The invention discloses a production method of lightweight concrete prefabricated big panels. The method comprises the following steps: 1, selecting raw materials according to a case that every cubic meter of lightweight concrete prefabricated big panels contains 450-550kg of cement, 65-195kg of stone flour, 3.25-9.75kg of a water reducer and 0.01-0.05kg of a foaming agent, foaming the foaming agent, uniformly mixing cement, the stone flour and the water reducer to prepare a cement mortar, adding the foamed foaming agent to the cement mortar, and uniformly stirring the foamed foaming agent and the cement mortar to prepare lightweight concrete; and 2, pouring the lightweight concrete in a die, and carrying out demolding treatment and curing to produce the lightweight concrete prefabricated big panels. The method solves the problem of adverseness of too large weight of common prefabricated big panels to transportation and hoisting installation, the weight of the lightweight concrete prefabricated big panels produced in the invention is about 50% lower than that of common concrete prefabricated big panels, and the construction efficiency of prefabricated wallboards is effectively increased.

The invention relates to a production method for high-crack-resistance concrete, and especially the production method comprises: screening concrete raw materials, testing gelling material system hydration heat, testing gelling material system restriction crack, testing concrete temperature stress, optically selecting a high-crack-resistance concrete mix ratio through primary design on the concrete mix ratio, and producing the high-crack-resistance concrete according to the concrete mix ratio. The production method comprises: screening the concrete raw materials, testing the gelling material system hydration heat, testing the gelling material system restriction crack, testing the concrete temperature stress, optically selecting the best high-crack-resistance concrete mix ratio, and producing the high-crack-resistance concrete according to the concrete mix ratio. According to the production method, the best high-crack-resistance concrete mix ratio is optically selected, and the produced concrete has relatively high crack resistance, is not easy to crack and deform, and has safety and quality guarantees.