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

There is proposed a nonvolatile information recording and reproducing device with low power consumption and high thermal stability. The information recording and reproducing apparatus according to an aspect of the present invention includes a recording layer and a unit for recording information by applying a voltage to the recording layer to generate a state change in the recording layer. The recording layer being configured to include at least a first compound having a hollandite structure.

The invention provides a safe refuge for families. The safe refuge is arranged in a building and comprises an anti-explosion wall, an anti-explosion door, an anti-explosion ceiling and an anti-explosion bottom plate, wherein the anti-explosion door is arranged on one side of the anti-explosion wall; the anti-explosion ceiling is positioned on the top of the anti-explosion wall; the anti-explosion bottom plate is positioned on the bottom of the anti-explosion wall; and the anti-explosion wall, the anti-explosion door, the anti-explosion ceiling and the anti-explosion bottom plate form closed space. The safe refuge for the families can simultaneously defend or partially defend the following damage events: earthquake disasters, occasional terrorist attacks (light weapon and explosion of a small amount of explosives), violent burglary, 'nuclear radiation weapons' and even nuclear explosion.

The invention discloses a testing device of antistrip performance of bituminous mixture. The testing device comprises a base platform, a vertical column, a liftable platform and a steel wire brush, wherein the vertical column is arranged on the base platform, the liftable platform is installed on the vertical column, a motor and a speed reducer are installed on the liftable platform, the speed reducer is connected with the steel wire brush through a coupler, and steel wires densely distributed on the steel wire brush right face a test piece placing groove on the base platform. The invention further discloses an evaluation method which comprises the following steps of drying a test piece to be tested to constant weight, weighing the test piece and fixing the test piece; staring a temperature controller to enable the inner temperature of the test piece to reach the test temperature; placing the steel wire brush on the surface of the test piece and sleeving an annular counter weight on the steel wire brush; staring the motor, driving the steel wire brush to rotate on the surface of the test piece through the speed reducer and the coupler, and performing counting; taking out the test piece to perform weighing after set time; and finally evaluating the antistrip performance of the test piece according to a formula of peeling rate per unit area. The evaluation method has the advantages of being simple and easy to operate, visual, accurate and reliable in evaluation result, and the like.

An irregular oblique-crossing web-shaped grillage beam hyperbolic roof structure construction method comprises the steps of construction preparing, secondary conversion of design drawing, lofting grillage beam ground projection axis measuring, steel pipe buckling piece all-round scaffold supporting system erecting, grillage beam bottom wood ridge lower support horizontal rod elevation giving off, wood ridge binding and bottom plate paving on a supporting horizontal rod, given-off roof beam position measuring, bound grillage beam steel rib machining, grillage beam grillage side mould mounting and reinforcing, grillage beam top plate mounting and reinforcing, face plate steel rib binding and hyperbolic roof concrete pouring. Through a space three-dimensional technology, a reasonable supporting system and accurate location of a hyperbolic roof and a grillage beam, the concrete mixing proportion is optimized, the quality and the attractive degree of the hyperbolic roof can be improved, construction difficulty is lowered, and construction efficiency is improved.

The invention discloses a construction technique for ultralow-temperature high-property concrete for railway construction in frigid areas. The construction technique comprises the steps as follows: A, mixing ultralow-temperature high-property concrete: gelled materials, sand, crushed stone, an efficient water reducing agent, compound antifreeze and water are evenly mixed to obtain the ultralow-temperature high-property concrete; the gelled materials are made by evenly mixing cement and mineral admixtures in the weight ratio of (88-78):(12-22); the weight ratio of the compound antifreeze to the mineral admixtures is (3-6):100; the compound antifreeze comprises 30 to 35 wt% of nitrate, 30 to 33 wt% of organic compound, 0.5 to 1wt% of calcium formate, and water as the rest; the nitrate is calcium nitrate or calcium nitrite; and the organic compound is methanol or alcohol; B, pouring the ultralow-temperature high-property concrete; and C, curing the ultralow-temperature high-property concrete. The construction technique has the advantages of reasonable design, simplicity in construction steps, convenience in operation, fast construction progress, low construction cost, and good structural quality of concrete used in construction.

The invention discloses a curing-free PHC pipe pile concrete. Production raw materials of every cubic meter of the concrete comprise 300-450kg of portland cement, 25-110kg of granulated blast-furnace slag powder, 10-100kg of fly ash microspheres, 10-100kg of silica fume, 20-60kg of an expanding agent, 640-725kg of fine aggregates with the fineness modulus of 2.4-3.0, 1120-1200kg of coarse aggregates with the granular composition of 5-25mm, 0.1-0.5kg of triethanolamine, 2-6kg of lithium sulfate, 7-13kg of anhydrous gypsum, 4-7kg of a water reducer, and 125-140kg of water. The concrete is used for producing PHC pipe piles, and can reach the demolding strength requirement of the curing-free PHC pipe piles and the strength requirement of C80 concrete at normal temperature in a short time.