31results about How to "Inhibition of sinking" patented technology

The invention discloses modified steel slag cement, and belongs to the technical field of building materials. A preparation method of the modified steel slag cement comprises the following steps: pulverizing and sieving steel slag to obtain steel slag powder; stirring the steel slag powder and sulfuric acid for reacting, performing cyclic freezing and unfreezing, and performing filtering and drying to obtain pretreated steel slag powder; performing ball milling, stirring and mixing on potassium permanganate and the pretreated steel slag powder, and performing high-temperature calcination to obtain calcined steel slag powder; performing ball milling, stirring and mixing on calcium carbonate, aluminum powder and the calcined steel slag powder, and performing combustion reaction to obtain modified steel slag powder; and adding cement, the modified steel slag powder, modified bagasse, a silane coupling agent and water to a mixer, and performing stirring and mixing to obtain the modified steel slag cement. The modified steel slag cement provided by the invention has excellent early strength, mechanical strength and stability.

The invention discloses a method for producing foamed glass by melting blast furnace slag. The method comprises the following steps: using the blast furnace slag as a main raw material to produce the foamed glass, wherein the blast furnace slag is metallurgical furnace slag produced online in the ironmaking process of a blast furnace; after acquiring the blast furnace slag from a slag discharge opening of the blast furnace, directly mixing with other raw materials in a high-temperature molten state; finally preparing the foamed glass. The method uses melting blast furnace slag with a high content of glass body as the main raw material, makes full use of residual heat of the melting blast furnace slag and secondary resources, and achieves purposes of energy conservation and environmental friendliness.

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 modified coal gangue aggregate concrete and belongs to the technical field of building materials. The modified coal gangue aggregate concrete is prepared by the following steps: taking coal gangue aggregate and hydrochloric acid to react; filtering, washing and drying to obtain first-time treated coal gangue and acid leaching filtrate; ultrasonically dispersing the pre-treated coal gangue, nano iron powder and a saturated sodium fluoride solution; filtering, washing and drying to obtain second-time treated coal gangue; carrying out high-temperature reaction on the second-time treated coal gangue and cooling to obtain third-time treated coal gangue; mixing the third-time treated coal gangue and the acid leaching filtrate and stirring and mixing; then dropwise addingammonia water and filtering and washing to obtain fourth-time treated coal gangue; adding the fourth-time treated coal gangue into a tubular furnace and carrying out high-temperature reaction; coolingto obtain modified coal gangue crushed aggregates; stirring and mixing the modified coal gangue crushed aggregates, cement, fly ash, silicon ash, slag, water, a silane coupling agent and a water reducing agent to obtain the modified coal gangue aggregate concrete. The modified coal gangue aggregate concrete provided by the invention has excellent anti-freezing and dry shrinkage performance.

There is provided an injection molding method in which a molten resin, which is injected into a molding space formed between a fixed side mold including a movable insert and a movable side mold, is cooled in a state in which a surface of the molten resin comes into contact with the movable insert and thereby the surface is solidified, and internal solidification of the molten resin is completed by cooling the molten resin in a state where the molten resin and the movable insert are separated from each other by moving the movable insert before the internal solidification of the molten resin, whose surface is solidified in a state in which the surface comes into contact with the movable insert, is completed.

The invention discloses a method for preparing inorganic fibers by compounding of slag and coal gangue. According to the method provided by the invention, firstly, desulfurization gypsum and CaO are used as activators, the coal gangue and fly ash are subjected to chemical/thermal composite excitation treatment, the coal gangue and the fly ash are excited by heat, so that the structure of glass networks of the coal gangue and the fly ash is destroyed, active SiO2 and Al2O3 are dissolved out, the dissolved-out active SiO2 and Al2O3 and CaO are subjected to a solid phase reaction, a new substancewith hydraulic activity is generated, and the activity of a pozzolanic reaction of the material is improved; and then the active material and blast furnace slag are mixed and ground, melt centrifugation drawing is performed, so that the inorganic fibers are prepared, the slag and other raw materials are introduced in the manner of fibers, the fibers can be uniformly distributed into a hardened slurry, and a grid structure can be formed, so that the problem of bleeding of concrete is improved, the compactness of the hardened slurry is improved, and the compressive strength and durability of the concrete are improved.

The invention provides tunneling equipment and a control method of the tunneling equipment. The tunneling equipment comprises a walking assembly, a main machine and a controller. The main machine is arranged on the walking assembly, the main machine is provided with a guide rail, a curve-shaped guide part and a drill bit, the curve-shaped guide part is arranged on the guide rail, and the drill bitis connected with the curve-shaped guide part; the controller is connected with the walking assembly and the main machine, wherein the controller controls the drill bit to rotate and controls the curved guide part to move along the guide rail after controlling the walking assembly to move to a preset position. The structure of the tunneling equipment is reasonably arranged, the tunneling equipment tunnels and drills along the curve shape of the surrounding rock, therefore, the drilling depth can be increased in a targeted mode according to the specific actual use condition, so as to meet thehole forming depth requirement, the tunnel arch foot reinforcing requirement can be met, meanwhile, the structure provides a structure foundation for achieving fore-reinforcement and forepoling functions, and then the purposes of preventing arch feet from sinking and improving the surrounding rock stability can be achieved.

The invention discloses a sponge body foamed glass formula and a production process thereof. The sponge body foamed glass comprises the following components in percentage by weight: 96-99 percent of glass particles, 0.1-3.9 percent of potassium feldspar powder, 0.1-0.9 percent of shell powder and 0.1-0.9 percent of slaked lime. The process for producing the sponge body foamed glass comprises the following steps: S1, preparing materials; S2, sintering and bulking; and S3, cooling. According to the formula and the production process of the sponge body foamed glass disclosed by the invention, the defect that the traditional foamed glass production process is complicated is improved; and moreover, the formula of the sponge body foamed glass serves as a production raw material, and according to the production process of the sponge body foamed glass, the speed of a conveyor belt of a sintering furnace and the furnace temperature are controlled, and the sponge body foamed glass of which the specific gravity is 0.3-1.3, the water absorption rate is 1-110 percent and the pore size is 1.2-420 microns can be prepared.

A vehicle body member manufacturing method and a vehicle body member joint portion seal structure are obtained that are capable of suppressing sinking of a sealing material filled into a recess formed by a first member and a second member. A sealing material is filled into a recess provided between a general face of an upper end portion of center pillar R/F and a general face of side rail R/F. After the sealing material has cured, sealing material is filled into the recess on top of the initial sealing material. This enables the surface of the sealing material to be leveled, thus enabling sinking at the surface of the sealing material to be suppressed.

The invention relates to a double shouldered welding device for the friction stir welding of parts, in which at least one shoulder has two concentric rings providing two plane concentric bearing surfaces, the rings being arranged so that the smaller-diameter ring is capable of compressing the stirred material of the parts to be welded during advance of the welding device and so that the larger-diameter ring is capable of forming a sink-in stop for the smaller-diameter ring. The invention also relates to a method of friction stir welding by means of the welding device according to the invention, in which said device is force-driven.

The invention provides a cushion pad that reduces the wobbling feeling. Regarding the test piece sampled from a core portion (22, 23, 32, 33), the measured deflection under a load of 100 N during compression is equal to or less than 30 mm. The measured static spring constant under a load of 300 N at a pulling rate of 20 mm/minute is equal to or less than 25 N/mm. In the case of a vibration input in a low frequency band in the lateral direction, the compressive stress in the vertical direction due to the weight of a seated person (H) and the tensile stress due to the vibration input in the lateral direction act on the support portion (2). The direction (gradient) of the resultant force as a combination of the compressive stress and the tensile stress can be closer to the vertical direction. This allows reducing the wobbling feeling.

A case for accommodating a disc-shaped recording medium such as CD or DVD is disclosed. The case included a front lid opened and closed and a body formed with a central button and a holder including an annular piece formed with an engagement groove for engaging a fixing hole of the disc-shaped recording medium with legs. The annular piece is disposed around the button and the holder further includes a spring portion. A force acting so that an upper side of the disc-shaped recording medium is pressed such that the recording medium is depressed and rendered against a force acting so that the button is pushed upward via a second hinge by the spring portion. As a result, the button is prevented from being pushed over its toggle dead point and the disc-shaped recording medium is re-fixed to the annular piece by reduction and/or elimination of the external force.

The invention relates to the technical industry related to energy conservation, environmental protection and new materials, and particularly discloses an optimization method for full-recycled brick aggregate concrete under the coupling action of volcanic ash activity enhancement and hybrid fiber enhancement, which comprises the following steps: firstly, carrying out chemical enhancement optimization on recycled brick aggregate to promote the effective active components of the recycled brick aggregate to react with Ca (OH) 2 to generate C-S-H gel; the compactness of the C-S-H gel is improved, the variety of the C-S-H gel is improved, the primary hydration rate of cement clinker in a certain range of the recycled brick aggregate is improved, and secondary hydration of the cement clinker is promoted; the recycled brick aggregate is further physically enhanced and optimized, and hybrid fibers of different materials and specifications are specifically selected to enhance the concrete in different dimensions. According to the optimization method and the corresponding concrete mix proportion, the defects of the all-recycled brick aggregate concrete are comprehensively improved, the performance of the all-recycled brick aggregate concrete is improved, resource utilization of the building waste sintered clay bricks is achieved, the comprehensive utilization rate of cement is remarkably increased, and the performance of the cement is fully exerted.

An air direction device is submerged under a dry dock. The device imitates the orientation of the dry dock and is in communication with an air source, which pipes air under the device. The air travels to the most elevated portion of the device, which in turn directs the air into a depressed tank to correct dry dock imbalance.