58 results about "Sorel cement" patented technology

A method of servicing a wellbore in contact with a subterranean formation comprising viscosifying a cement composition comprising a metal oxide and a soluble salt, placing the viscosified cement composition in the wellbore, and allowing the composition to set. A method of cementing a wellbore comprising preparing a cement composition comprising magnesium oxide, a chloride or phosphate salt, and a quaternary material, placing the cementitious composition into the wellbore, and allowing the cementitious composition to set. A method of viscosifying a Sorel cement comprising contacting the cement composition with quaternary material.

The invention relates to a premix of a grouting material. The premix is characterized in that the premix comprises the following components, by weight, 65-90% of ordinary portland cement with the strength level of 42.5MPa or low alkaline cement with the strength level of greater than 42.5MPa, wherein the water demand for normal consistency is less than 25%, and the tricalcium aluminate content is lower than 8%; 2-29.696% of an ultrafine mineral admixture with a specific surface area of greater than 450m<2>/kg, a water demand ratio of less than 95%, and a 28d activity index of greater than 90%; 5-15% of calcium sulphoaluminate; 0.1-1.5% of a melamine water reducer; 0.002-0.2% of a cellulose polymer, an acrylic polymer or polyoxyethylene; 0.1-1.0% of a carbohydrate, a hydroxycarboxylic acid compound and salts thereof, a sulfate, a carbonate, or calcium formate; 0.002-0.1% of vinyl acetate-ethylene copolymerized rubber powder; and 0.1-1.0% of a chromate or a borate.

The invention relates to intraluminal endoprosthesis, preferably a stent consisting essentially of a base body and optionally a coating covering the surface of the base body at least partially. The invention is characterized in that the base body and/or the coating has at least one compound from the group of polyphosphates, magnesium oxyhalides, preferably Sorel cement. Furthermore, a method is described for manufacturing such an intraluminal endoprosthesis.

The invention relates to a polystyrene glass fiber cement thermal baffle and a manufacturing technology thereof. A polystyrene plate EPS is connected with the lower end surface of a glass fiber reinforced cement plate GRC, and a tenon and a tusk are arranged on the middle end surface of the polystyrene plate EPS. The manufacturing technology comprises the steps that forming is performed by adopting polystyrene resin grain is molded through high temperature foaming in a steel die; an inverted capsule structure is manufactured on the contact surface between the polystyrene plate EPS and the glass fiber reinforced cement plate GRC, and a pre mixed short glass fiber reinforced cement plate GRC is filled in the capsule, to form composite layers which are firmly meshed; alkali-resistant glass fiber and low-alkali cement, sand, water, inorganic pigment and brightening agent are matched and evenly stirred, then are put into a die to be compounded with the polystyrene plate EPS, and then is demolded and maintained. The polystyrene glass fiber cement thermal baffle has the advantages of thermal insulation and high tensile facing, and has the function for breaking cold/thermal bridges. The polystyrene glass fiber cement thermal baffle can be applied to the moisture protection, the thermal insulation, the sound insulation and the decoration of the roof coverings, walls and floors of various buildings.

This invention discloses a binding material for producing industrial waterproof briquette capable of being pressurization-gasified without drying process. The binding material is powdery, and is formed by: pulverizing Sorel cement 50%, bentonite 15%, steel slag 20%, and graphite tailing 10%, and trisodium phosphate 5%, and mixing. The briquette produced from the binding material has such advantages as high cold strength, good waterproof property, convenient transportation, low cost, simple process, convenient maintenance, high thermal stability, high gasification rate, and good sulfur-fixation effect. The binding material can solve the problems of low waterproof capacity, low gasification rate, low combustion efficiency, low thermal strength and no air permeability faced by conventional briquette.

The invention discloses low-alkali cement clinker, low-alkali high-strength cement and a preparation method thereof, and belongs to the technical field of cement manufacturing. The low-alkali cement clinker is mainly prepared from the following raw materials in parts by weight: 810-840 parts of limestone, 50-70 parts of low-alkali sandstone, 25-35 parts of sulfate slag, 80-100 parts of wet fly ashand 12-16 parts of fluorine-containing iron ore; wherein the mass fraction of CaO in the limestone is not less than 50%. The low-alkali high-strength cement comprises the low-alkali cement clinker and an admixture in a weight ratio of (55-75) : (25-45). The low-alkali cement clinker is low in alkalinity, high in later strength and suitable for bridge engineering construction, the probability thatcement prepared from the cement clinker cracks in the using process is reduced, and the service life of engineering is prolonged.

An application of detoxicated Cr slags in preparing early-strenthening low-alkali cement and its products is disclosed. Said cement is prepared through proportionally mixing said detoxicated Cr slags with clinker and natural bihydrated gypsum. Its advantages are high quality of cement and no secondary pollution.

An insulating composite building block with high insulating effect is composed of a hollow building block and a core. Its preparing process includes such steps as proportionally mixing flyash with Sorel cement, stirring while adding additive, filling the mixture into hollow building block, natural foaming, and natural curing.

The invention discloses an open-pit copper mine rock slope ecological greening system. The greening system comprises an open-pit copper mine rock slope, a geocell and a vegetation base material, the geocell is fixed on the open-pit copper mine rock slope through a steel bar anchor rod, the vegetation base material is filled in the geocell, the vegetation base material comprises copper tailings, plant fibers, low-alkali cement, an aggregate agent, a water-retaining agent, a pH regulator and an organic fertilizer, the vegetation base material comprises a vegetation base material bottom layer and a vegetation base material surface layer, and the vegetation base material bottom layer is arranged close to the open-air copper mine rock slope. According to the greening system, a large amount of tailing solid waste existing in a copper mine is used as a main raw material to prepare the slope greening planting base material, so that the purpose of treating waste with waste is achieved, the greening cost is reduced, pollution caused by tailing solid waste stockpiling is reduced, and the ecological environment of a mining area and the surrounding of the mining area is improved. The open-pit copper mine rock slope ecological greening system does not need large mechanical equipment during construction, and is simple and convenient in construction method, good in long-term stability, short in construction period and low in manufacturing cost.

The invention provides a saltpetering-preventing cement mortar and a maintenance method. The cement mortar comprises the following components: ordinary Portland cement, sand, ultrafine silicon powder,attapulgite powder, bentonite and cellulose ether. The surface of a paving material is immediately covered with a plastic film after the hard paving construction is finished. The saltpetering-preventing cement mortar has the advantages that the cement design strength and the economy can be ensured, the saltpetering is inhibited in the later period of cement mortar; and the film covering method after construction can accelerate the development of the internal structure of the cement mortar and accelerate the improvement of the closing amount of internal ducts of the cement mortar, so that thesaltpetering phenomenon is fundamentally reduced.

The invention discloses a waste curing agent containing modified blast furnace slag. The waste curing agent is prepared by mixing the following components in parts by weight: 1.4-2.2 parts of caustic soda, 1-1.5 parts of cement, 3.2-5.4 parts of gypsum, 1-2 parts of triethanolamine, 1.3-2.2 parts of alkyl glycoside, 0.6-0.8 part of alum, 0.6-1.2 parts of calcium lignosulphonate, 0.4-1.2 parts of modified nano blast furnace slag, 1-2 parts of sodium chloride, 1-2 parts of magnesium chloride, 1.5-2.3 parts of polyacrylamide, 0.9-1.8 parts of aluminum sulfate, 0.3-0.7 part of dicalcium silicate and 0.6-0.8 part of tricalcium aluminate. In addition to hardening effect of a common curing agent, the waste curing agent containing the modified blast furnace slag further reasonably utilizes the waste and changes the waste into things of value; the hardening effect is strengthened by the nano modified blast furnace slag.

The invention discloses an alkali-resistant cement paste plugging method. The method comprises the following steps of 1, analyzing chemical components of gushing water in a well, according to the components, utilizing alkali halide gushing out from the well, preparing a formula of indoor plugging alkali-resistant cement paste, testing, calculating the amount of the required plugging alkali-resistant cement paste, storing a certain amount of underground alkali halide on site to prepare the alkali-resistant cement paste, observing the static pressure of the gushing water, measuring the specific gravity of cement paste in the well, calculating the pressure of a water burst formation, and calculating the specific gravity of counterweight cement paste according to the well depth and the well diameter. The invention not only provides a method for controlling gushing by water emitting, but also thoroughly solves the problem of limited resource exploitation, changes the limitation of a trona exploitation fracturing water-soluble mining process, ensures the purity of the cement paste, enhances the cementing strength of the cement paste, enhances the rigidity of the cement paste after coagulation, ensures the well completion rate, and the environmental protection pressure is also reduced.