52 results about "Cement type" patented technology

The invention discloses a polymeric aluminum sulfate synthesis method and discloses a preparation method of a novel alkali-free liquid accelerator based on synthesis of polymeric aluminum sulfate. According to the alkali-free accelerator, an aluminum sulfate solution is neutralized by ammonia water, active aluminum hydroxide gel is prepared, active aluminum hydroxide is filtered, dried and ground into powder, then the aluminum sulfate solution is added, and the polymeric aluminum sulfate is prepared. The alkali-free accelerator comprises, in percentage, 45%-55% of the polymeric aluminum sulfate, 0%-5% of inorganic acid, 0%-2% of a stabilizer, 0%-2% of an organic early strength agent, 0%-2% of an organic tackifier and the balance of water. The cement setting time and the colloidal mortar strength of the accelerator can meet the requirement of first-class accelerators for JC477-2005 sprayed concrete under the condition of the lower mixing amount, and meanwhile, the accelerator is an alkali-free liquid accelerator and can effectively avoid adverse effects caused by excessively high alkali content. The cement types of the accelerator have good adaptability.

PCT No. PCT/JP94/00479 Sec. 371 Date Dec. 8, 1995 Sec. 102(e) Date Dec. 8, 1995 PCT Filed Mar. 25, 1994 PCT Pub. No. WO94/21570 PCT Pub. Date Sep. 29, 1994An admixed and kneaded material of a mixture of a hydraulic powder, a potentially hydraulic powder, water, and fine and coarse aggregates, if necessary is molded and hardened. Then the hardened body is heat cured to form silicic acid anions of at least a trimer. This molded and hardened body has a compression strength at least 1000 kgf/cm2 and a bending strength of at least 150 kgf/cm2 so that hardened cement body having a high mechanical strength can be obtained without using a special reinforcing member or fiber. The hardened concrete product of this invention has a high bending strength, compression strength and modulus of elasticity. A glaze can be applied and fired to obtain beautiful concrete products.

An additive for, a method of adding thereof to uncured mixes for and resulting cured cement-type concreations such as cured embodiments of concrete, marcadam, and roof-top shingles each exhibiting improved heat and freeze-thaw durability resulting from reduced efflorescence and stability against sun ultraviolet light exposure.

The invention discloses a high-stability low-alkaline liquid accelerator and a preparation method thereof. The accelerator is prepared from aluminum sulfate, sodium fluoride, a stabilizer and water; the accelerator is prepared from the components in percentage by mass: 45-60% of aluminum sulfate, 8-15% of sodium fluoride, 5-10% of stabilizer and the balance of water; the stabilizer is one or a mixture of multiple of o-phosphorylethanolamine, diethanolamide phosphate, triethanolamine phosphate, triethanolamine borate and boronized diethanolamide phosphate. The high-stability low-alkaline liquidaccelerator has the advantages that production raw materials are easy to obtain, no special requirements on required equipment exists, operation is simple, the long-term storage stability is good, the adaptability to cement types is wide, the mixing amount is less, setting speed is high, the strength is high, and the like.

The invention provides a method for fast predicting compressive strength of cement in 24 hours. Existing JC/T738-2004 fast cement test equipment is adopted, a group of mortar test blocks are formed, the compressive strength at two ages in 24 hours of hot and humid maintenance at 55 DEG C is tested, weight maturity is calculated according to cement type values and substituted into a relation to predict the compressive strength of the cement in 28 days. Research shows that the fast prediction method is feasible and effective, and the 28-day strength prediction accuracy is high.

The invention discloses a mud-resistant and slump-retaining type polycarboxylate superplasticizer. The method comprises the following steps: firstly, performing esterification reaction on maleic anhydride and 2-hydroxyphosphonoacetic acid under heating and stirring conditions to obtain a mud-resistant functional monomer; and then introducing a hydrophobic polyether macromonomer, acrylic acid and amethyl methacrylate monomer to carry out free radical polymerization. According to the mud-resistant and slump-retaining type polycarboxylate superplasticizer, the mud-resistant and slump-retaining properties of the obtained fresh concrete can be effectively guaranteed, and the workability and mechanical properties of the obtained fresh concrete are further improved; the applicability to cement types, gravel quality and the like is high, and technical support can be provided for application of the gobi material in the Xinjiang region in concrete; and the related preparation method is simple,mild in reaction condition, environment-friendly and suitable for popularization and application.

The invention relates to implant materials that are based on hydraulic cements in the form of one or more pastes, suspensions or dispersions that contain mineral and/or organic and/or organomineral solids and that react, when combined or when reacted with an aqueous liquid, to a solid in a cement-type initiation reaction. The invention also relates to the use of these materials as technical, medical-technical and/or pharmaceutical products, especially as bone cements, bone replacement materials, bone glues, dental filling materials and implantable active ingredient carriers. The implant materials according to the invention in the form of one or more pastes, suspensions or dispersions that contain mineral and/or organic and/or organomineral solids are formulated in an excipient liquid in such a manner that the pastes, suspensions or dispersions are stable in storage at normal conditions over a prolonged period of time and that they react, when combined with an aqueous liquid or when added to an aqueous liquid, in a cement-type initiation reaction and set to a solid. The excipient liquid of the mineral paste, suspension or dispersion is substantially water-free, and water immiscible or insoluble or hardly soluble in water in the chemical sense.

The invention provides repair mortar. The repair mortar is prepared from the following components in percentage by mass: 5-15% of silicate cement, 30-50% of sulphate aluminium cement, 10-30% of doublequick cement, 1-2% of redispersible latex powder, 5-10% of expanding agent, 10-30% of silica sand, 0.1-0.5% of early strength agent, 0.5-1% of rheological agent, 0.2-0.5% of defoaming agent and 15-20% of water. According to the repair mortar, the multiple kinds of cement are adopted for compound use, by reasonably selecting the cement types, optimizing a ratio of the cement and adding the appropriate additives of the shrinkage-compensating material expanding agent, the early strength agent and the like, the finally obtained repair mortar has the advantages of fast setting, high early strength, high bonding force and no shrink; an example result shows that setting time of the repair mortar is about ten minutes, the strength in half an hour can reach 8 MPa or above, and the requirements offast repair and the durability of precast units are met.

The invention relates to a concrete construction control method for preventing harmful cracks of a wallboard. The method includes: (1), determining initial setting time t of concrete; (2), selecting a suitable cement type, construction condition and construction concrete with appropriately dispensed additive agent according to the required initial setting time t; (3), concrete pouring from a plane direction, dividing a whole construction area into three subareas according to construction joint position, and performing construction sequentially; and (4), concrete pouring from a vertical direction, dividing the whole construction section into two subsections according to an elevation from minus 4.04m (metre) to 0.84m, and performing construction from a first subsection to a second subsection. Compared with the prior art, the method can shorten construction period, outside templates of the wallboard can not necessarily be removed in advance in order to meet the deadline of construction, and therefore, wallboard concrete can complete contraction distortion slowly under a humid environment, temperature difference cracks caused by temperature difference inside and outside the concrete resulting from removing the templates in advance are effectively prevented.

The invention discloses an early-strength water reducer, which comprises the following raw materials by weight: 36-48 parts of benzyl naphthalene sulfonate formaldehyde condensate, 14-22 parts of polyacrylamide, 25-35 parts of methylene dimethyl binaphthol sulfonate polymer, 12-16 parts of asphalt, 5-10 parts of nano zirconium carbide, 7-14 parts of precipitated barium sulphate, 4-8 parts of urea, 10-15 parts of bentonite, 5-10 parts of silica fume, 5-10 parts of earthy graphite powder, 3-6 parts of calcium formate, 2.5-4.5 parts of sodium hyposulfite, 4-7 parts of phosphogypsum, 8-12 parts of polyester propylene glycol, 4-8 parts of paper pulp waste liquid and 3-5 parts of auxiliary agent. The early-strength water reducer has good early strength, water reduction and enhancement effects, the water reduction rate is large, concrete strength at early stage and anaphase can be obviously increased, frost resistance, impermeability and endurance performance of the concrete can be enhanced, and the early-strength water reducer has good adaptability to cement types, and accords with a national standard of a concrete additive.

The invention relates to a cement forming and application of ceramic hollow plate, which uses organic or inorganic adhesive to cement a ceramic through hole plate, a ceramic end plate, a ceramics inlet and outlet nozzle or a ceramic through hole plate, a ceramic end plate with inlet and outlet or a ceramic through hole plate, a large nozzle ceramic end plate or a ceramic through hole plate, a large nozzle ceramic sleeve-jointed end plate into one body, to be a large channel cement-type ceramic hollow plate; and cement a large nozzle ceramic end plate or a large nozzle ceramic sleeve-jointed end plate and a plurality of ceramic through hole plates, ceramic porous plates, porous ceramic sleeve-jointed joints, single-hole ceramic sleeve-joint joints into one body, to be a large channel combined cement-type ceramic hollow plate, the adhesive is water-resistant, high temperature resistant, anti-aging, high-strength organic or inorganic structural adhesive. The cement-type ceramic hollow plate can be used for ceramic solar panel, ceramic far-infrared heat emission panel, ceramic far-infrared radiation plate, and for solar heat collection, building heating, far-infrared drying; compared with the prior corresponding traditional products, the ceramic-type cement hollow plate has the advantages of low-cost, long serve life, and high average work efficiency during the serve life.

The invention relates to a fast preparation device and a preparation method for a rock direct-tension sample and belongs to the technical field of rock mechanics test. The device comprises a base andan inverted L-shaped support. The base and the inverted L-shaped support form a basic framework. The basic framework is internally and vertically provided with a sliding rail. The sliding rail is provided with a matched sliding block. A rotating pull-down mechanism is connected on the sliding block through a first connector. A steel sleeve is arranged under the rotating pull-down mechanism. The base is equipped with a horizontal adjustment platform, a tilt adjustment platform and an electromagnetic chuck A. A steel sleeve is adsorbed on the electromagnetic chuck A. The rock direct-tension sample comprises a rock bar, steel tubes sleeving the both ends of the rock bar respectively, and plastic buckle covers arranged at the two ends of the steel tubes. The device and method can rapidly prepare the high-precision double-end steel tube cemented type rock direct-tension sample through a rotating pull-down method, can effectively eliminate the defects of uneven cementation and eccentric cementation and the like, and have the advantages of being economical and convenient, simple in structure and flexible in operation and the like.

The invention discloses a method for constituting a model for predicting the thermal diffusivity (alpha) of normal concrete along with the development of age (t). The invention studies the change rule of the thermal diffusivity (alpha) of the concrete with different water-cement ratios, admixtures, cement types, sand ratios and aggregate contents along with the development of the age (t), and establishes the model for predicting the thermal diffusivity (alpha) of the normal concrete along with the development of the age (t) according to the common rule of the thermal diffusivity (alpha) of the concrete along with the development of the age (t) under the different working conditions. The model is shown in a formula (as in the drawing). In the formula, alpha (t) is the value of the thermal diffusivity of the concrete at the age of t and has a measurement unit of m/h; and alpha (t) is the value of the thermal diffusivity of reinforced concrete and has a measurement unit of m/h; and t is the age and is measured by hour. The model can well represent the change rule of the thermal diffusivity (alpha) of the normal concrete along with the development of the age (t).

The invention discloses a simulation device for syngenetic cementation of carbonate rocks. The simulation device for the syngenetic cementation of the carbonate rocks comprises a bipolar piston pump,a saturated CO2 pressure container, and a precipitation reaction unit, wherein the bipolar piston pump is connected with the saturated CO2 pressure container; and the saturated CO2 pressure containeris connected with the precipitation reaction unit. The simulation device for the syngenetic cementation of the carbonate rocks provided by the invention has the advantages that the process of cementation between the carbonate rocks and formation water under the environments of the surface vadose zone and the surface hyporheic zone can be simulated, so that occurrence control factors of the syngenetic cementation of the carbonate rocks and syngenetic cement types of the carbonate rocks can be studied through experiments, and the pore preservation mechanism can be facilitated.

The invention relates to a pressure bearing capacity detection device of a one-way valve for a cement type float collar and float shoe. The device comprises a sealing head which is provided with a sealing end, an opening end and a side wall positioned between the sealing end and the opening end. The side wall is provided with a locating ring and a stopping block which can move along a radial direction. The device also comprises a sliding sleeve which is sleeved on the sealing head. The sliding sleeve comprises a sliding sleeve spring and a locating groove which is positioned on the inner wall of the sliding sleeve. The device still comprises a hollow body which is accommodated inside the inner cavity of the sealing head. The hollow body can accommodate the valve seat of the one-way valve, and the side wall of the body is provided with an accommodating groove. The device further comprises a testing mouth which is connected with the one-way valve so as to conduct a detection. The sliding sleeve can move between a first location and a second location in an axial direction. When the sliding sleeve lies in the first location, the stopping block moves outwardly into the locating groove in the radial direction and the body is allowed to move into the inner cavity of the sealing head along the axial direction. When the sliding sleeve lies in the second location, the stopping block is pressed inwardly into the accommodating groove by the inner wall of the sliding sleeve in the radial direction so that the movement of the body along the axial direction is limited.

This invention is related to the production of High Performance Cement (HPC) where the clinker (being the raw material for ordinary Portland cement (OPC) which is the major material in the construction industry), is ground through a special grinding technology (regarding conformity to the designated principles during grinding, like; regime temperature, humidity, grinding duration) by adding a modifier (complex chemical composition) for improving mechanical-chemical properties of the cement particles, resulting production of high performance cements such as HPC 62.5 with better properties than the known cements in the standards. The invention is also related to the use of same technology to improve the performance and quality of the composite cement types with reduced clinker content for replacement of other additions such as; slag, limestone, sand, fly ash, trass (pozzolan) etc.; The invention also defines the production process and production units of the high performance cement.

The invention relates to a polymer cement waterproof adhesive applicable for roof, underground building, joint, sealing and bonding. 48kg cements and 52kg quartz sand are added in a mixer in sequence, stirred for 5-10 min and discharged to get 100kg cement color powders; 68kg vinyl acetate-ethylene copolymer emulsion, 14kg methyl methacrylate, 18.5kg water, 0.12kg sodium polycarboxylic acid and 0.13kg poly (dimethylsiloxane) are sequentially put into a reactor with the reaction temperature being 63-68 DEG C, stirred for 1h and discharged and 100kg ivory white liquor material is produced; the powders are poured into the liquor material according to 1:1 weight ratio and the adhesive is obtained after the mixture is evenly stirred. The invention has the advantages of low cost, less application devices, easy operation, no danger, innocuity, excellent adhesion, waterproof property and permeability and being capable of construction in wet base.

The invention discloses a controllable method for grouting holes in building engineering, comprising the following steps of comprehensively checking whether component holes, grouting holes, exhaust holes, drainage holes, and the like, are smooth before grouting, checking the configuration of grouting equipments, determining the cement mortar mixture ratio suitable for grouting according to the requirement of designed construction drawing, temperature and cement types, grouting from the lower layer holes to the upper layer holes, grouting the vertical holes from bottom to top, and reserving cement mortar test blocks, etc. The grouting method can control the grouting amount exactly, leads the cement mortar pressed into the pre-stressed hole not to generate the phenomena of bleeding or separating, leads the clearance not to occur after condensation, and leads the mortar to be saturated and compact, thus improving the safety and durability of the concrete engineering.

The invention discloses a cementing type composite insulator chain element with a double-umbrella-shaped and three-umbrella-shaped disk suspension type polymer. The element comprises a steel cap fitting, a steel leg fitting, an insulation core part, a polymer protecting sleeve and a polymer umbrella skirt. A cavity with the U-shaped section is formed in the steel cap fitting. The steel leg fitting is provided with a conical head portion matched with the cavity. The conical head portion of the steel leg fitting is arranged in the cavity of the steel cap fitting. The insulation core part is arranged between the conical head portion and the cavity. A cementing part is arranged in the center portion of the insulation core part and is an inverted-cone-shaped cavity. The outer surface of the insulation core part is covered with the polymer protecting sleeve. The outer surface of the polymer protecting sleeve is provided with the polymer umbrella skirt of a double-umbrella-shaped or three-umbrella-shaped structure. The conical head portion of the steel leg fitting and the cementing part are cemented into a whole through adhesive. The cavity of the steel cap fitting and the cementing part are cemented into a whole through the adhesive. The element can prevent bird damage, resist sand wind, prevent external force damage and assist in climbing and treading.

The simple drawing mold with cement mold surface includes one lower mold, one mold pin, one clamping ring, one upper mold, one cement mold surface fixing rod, one upper mold lining, and one cement mold surface. The lower mold and the clamping ring form one steel mold structure with steel mold surface; the upper mold is one steel mold structure with cement mold surface; the cement mold surface has one upper mold lining embedded during depositing cement; and the lower mold has corresponding mold surface hole with close fitted mold pin. The present invention has the following obvious advantages: saving in material, low numerically controlled machining cost, low cost and short making period.