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5620 results about "Cement Material" patented technology

Cement is often supplied as a powder, which is mixed with other materials and water. A cement is a binder, a substance used for construction that sets, hardens and adheres to other materials, binding them together. Cement is seldom used on its own, but rather to bind sand and gravel (aggregate) together.

Cement truck densimeter automatic cleaning device and method

The invention provides a cement truck densimeter automatic cleaning device and method. The cement truck densimeter automatic cleaning device comprises a liquid feeding pipeline, a centrifugal pump, atee joint, a densimeter mounting seat, a signal acquisition system, a control system and a cleaning tank, wherein the liquid feeding pipeline is connected with an inlet of the centrifugal pump, the tee joint is arranged between the centrifugal pump and the densimeter mounting seat, the third end of the tee joint is provided with a discharge pipeline in a connected manner; the densimeter mounting seat is connected with the cleaning tank; and the densimeter mounting seat is in electric signal connection with the signal acquisition system, and the signal acquisition system is electrically connected with the control system. According to the cement truck densimeter automatic cleaning device, the problem that cement adheres to the inner part of a densimeter is solved, the measuring precision ofthe densimeter is improved and the service life of the device is prolonged; cleaning liquid is automatically fed, the cleaning process is automatically circulated, the cleaning progress is automatically detected; and the cement truck densimeter automatic cleaning device is used for densimeter automatic cleaning, the operation is safer and more efficient, and on-site manpower is greatly saved.
Owner:CHANGQING GUJING OF CNPC CHUANQING DRILLING ENG +1

Composite fire-proof material with high refractoriness under load for coke ovens as well as furnace-building process and products thereof

InactiveCN102584294AImprove bindingWaste heat can be recovered for power generationCoke oven brickworkEnergy inputAdhesiveRefractory
The invention discloses a composite fire-proof material with high refractoriness under load for coke ovens. The preparation method of the material comprises the following steps of: evenly mixing and crushing 40%-60% of Al2O3, 15%-30% of SiC micro powder, less than 2% of Fe2O3, 5%-10% of Si micro powder and 1%-3% of cement as an additive; adding 3%-5% of Al(H2PO4)3 as an adhesive and stirring and mixing evenly; and pouring the mixture to a working region in 20-30 minutes. The furnace-building process comprises the following steps of: cleaning a kiln, measuring, molding, positioning and supporting a mould, adding materials, pouring and correcting, cleaning, starting for warming up and testing. The coke ovens newly built by pouring is characterized in that the top of the chamber of the furnace is fan-shaped, the chamber of the furnace is built by on-site seamless overall vibration pouring according to the process above with the furnace-building materials above, afterheat of the furnace can be recycled for power generation and no chemical residues exist. The furnace is short in charring time and higher in coke recovery and can be started and used at any time between the normal temperature and 1550 DEG C.
Owner:GUIYANG DONGJIBOYU REFRACTORY MATERIALS

Methods and systems for cementing wells that lack surface casing

A method for cementing a casing in an open well bore having no surface casing, wherein an annulus is defined between the casing and the well bore, the method having: sealing the annulus at the mouth of the well bore with a seal; pumping a cement composition into the annulus through the seal; and taking circulation fluid returns from the inner diameter of the casing. A system for cementing a casing in an open well bore having no surface casing, wherein an annulus is defined between the casing and the well bore, the system having: a seal of the annulus at the mouth of the well bore; a cement composition pump fluidly connected to the annulus through the seal; and a coupling connected to the exposed end of the casing for taking circulation fluid returns from the inner diameter of the casing. A seal of a well bore annulus at the mouth of an open well bore having a casing extending there from and no surface casing, the seal having: an annular plug around the casing in the annulus below and proximate the mouth of the well bore, wherein the annular plug has conduit through the annular plug allowing fluid communication with the annulus below the annular plug; an anchor attachable to the casing above the annular plug; and at least one jack positioned between the annular plug and the anchor, wherein the at least one jack pushes the annular plug downwardly away from the anchor.
Owner:HALLIBURTON ENERGY SERVICES INC

Paste combined filling method utilizing solid wastes of mine

The invention relates to a paste combined filling method utilizing solid wastes of a mine. The method comprises the following steps of: constructing a filling retaining wall at the inlet of an underground worked-out section, and filling waste stones in which target metal is not contained or the content of the target metal is less than a boundary level, wherein the lumpiness is 0 to 400 millimeters, the loose static angle is 40 to 45 degrees, and the filling volume rate of the waste stones is 10 to 45 percent; then mixing 6.25 to 21.25 weight percent of gelatinizing agent, 53.75 to 78.75 weight percent of filling aggregates and 15 to 25 weight percent of water into a stirrer so as to prepare a paste cement material with the weight concentration of 75 to 85 percent; and conveying the paste cement material to the worked-out section through pumping of a filling pipeline or self-flowing under the action of gravity along the filling pipe, wherein the paste cement material is penetrated into the gaps of the waste stones; and the solidified paste cement material and the waste stones form a combined filler. By the method, the utilization rate of beneficiation full tail sand, smelting water granulated slag and underground waste stones is up to 100 percent, so the tailings cannot enter the base, the waste stones cannot emerge from the groove and the smelting water granulated slag cannot be piled up; and the environment and safety problems due to stacking of the wastes on the earth surface are solved from the sources.
Owner:UNIV OF SCI & TECH BEIJING +1

Polyolefin composite modified asphalt wet-laid waterproof roll and production method thereof

The invention discloses a polyolefin composite modified asphalt wet-laid waterproof roll and a production method thereof. The polyolefin composite modified asphalt wet-laid waterproof roll comprises a modified asphalt binding layer, a binding isolation membrane protecting layer and a polyolefin thermoplastic elastomer material layer which can achieve a chemical crosslinking reaction and a physical mortise-and-tenon collaborative binding action in cooperation with concrete; and the interlayer structure is as follows: the first layer is the polyolefin thermoplastic elastomer material layer, the middle layer is the modified asphalt binding layer, and the lower layer is the isolation membrane protecting layer, and the layers are subjected to thermocompression binding in the production process. The waterproof performance of the waterproof roll is excellent; and the waterproof roll is wriggled and seeped into capillary bores in cement gel and concrete in cement and concrete setting processes by using modified asphalt with reactivity, and has a chemical crosslinking reaction at a contact interface, so that a basal plane reaction layer which is large in binding force, irreversible in binding, concurrently pliable and hard in binding, lasting in binding is formed, thereby achieving a closely and firmly combined and irreversible binding effect as closely linked as flesh and blood.
Owner:XI NIU PI WATERPROOFING TECH CO LTD

Preparation method of graphene oxide modified polycarboxylic acid type water-reducer

ActiveCN103241983AHigh flexural and compressive strengthRaw materials are easy to getCarbon compoundsCarboxylic acidWater reducer
The invention relates to a preparation method of a graphene oxide modified polycarboxylic acid type water-reducer. A polycarboxylic acid type water-reducer is a novel efficient water-reducer following a naphthalene type water-reducer, a melamine water-reducer and an amino sulfonic acid based water-reducer, but the mechanical property of concrete cannot be obviously improved by adding the polycarboxylic acid type water-reducer. The preparation method comprises the steps of preparing graphene oxide with natural flake graphite, sodium nitrate, concentrated sulfuric acid and potassium permanganate as raw materials; carrying out ultrasonic dispersion on the graphene oxide; and then adding the polycarboxylic acid type water-reducer with a certain proportion to form an intercalation compound of the graphene oxide and the polycarboxylic acid type water-reducer. With the adoption of the modified water-reducer, on the basisthat the existing water-reducing rate is kept, the flexural strength and the compressive strength of a cement-based composite are obviously strengthened, the relevant raw materials are easily obtained, a preparation technology is reasonable, pollution in a preparation process is little, the performance of products is excellent, and the graphene oxide modified polycarboxylic acid type water-reducer is suitable for industrial production.
Owner:广西科达新材料集团有限公司

Close packing high-performance cement-based fiber composite product and production method thereof

The invention discloses a close packing high-performance cement-based fiber composite product and a production method thereof, and particularly discloses a novel fiber-reinforced cement-based composite material product which is prepared by combining a close packing design high-performance cement technology with a hybrid fiber reinforcing technology and has the advantages of excellent constructability, ultrahigh strength, low deformation, high durability and the like. The close packing high-performance cement-based fiber composite product comprises a fiber-reinforced cement-based flexible anti-cracking surface layer and a fiber-reinforced close packing high-performance cement-based structural layer, wherein the fiber-reinforced close packing high performance cement-based structural layer is compounded on the fiber-reinforced cement-based flexible anti-cracking surface layer; 0-3 layers of netlike reinforced materials are paved in the fiber-reinforced close packing high-performance cement-based structural layer; and the fiber-reinforced cement-based flexible anti-cracking surface layer and the fiber-reinforced close packing high-performance cement-based structural layer are compounded in a mold with a decorative effect. The close packing high-performance cement-based fiber composite product is suitable for construction such as building outer wall decoration, indoor engineering construction, road construction, bridge construction and the like.
Owner:NANJING BEILIDA NEW MATERIAL SYST ENG
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