9 results about "Cement type" patented technology

The present invention relates to a method of producing cement, comprising the following steps: a) defining a cement type and cement quality to be produced, b) providing the reactants, where the reactants selected are at least clinker, a sulfate carrier and a clinker substitute, c) defining a ratio of the reactants and a grinding fineness of the cement, d) combining the reactants according to the defined ratio of the reactants, e) grinding at least one reactant in at least one mill to the defined grinding fineness, f) removing the finished cement, g) analysing the finished cement, where the analysis includes the following component steps: h) mixing the sample with water and continuously detecting the heat generated by the reaction that proceeds, i) determining the detected heat generated in the time window from 45 s to 60 min after mixing of the sample with the water, j) comparing the heat release determined from the hydrating cement with a heat associated with the defined cement quality and distinguishing between the following three cases: in the first case that the heat determined is less than the defined amount of heat, in the second case that the heat determined is equal to the defined amount of heat, and in the third case that the heat determined is greater than the defined amount of heat, characterized in that k) an energy cost, a CO2 cost and costs for the reactants are determined or defined, l) the defined grinding fineness and the energy cost are used to determine grinding costs, the CO2 cost and the CO2 load, especially of the clinker, are used to determine CO2 costs, and the costs for the reactants and the ratio of the reactants are used to determine material costs, where the sum total of grinding costs plus CO2 costs plus material costs is the total cost, m) where a closed-loop control method for minimizing total costs according to step I) is run in parallel with an optimization of the heat determined in step j) in order to achieve the second case in step j), where, in the first case in step j), the ratio of the reactants in step c) is altered by increasing the proportion of clinker and / or adjusted by increasing the grinding fineness defined in step c), where, in the third case in step j), the ratio of the reactants in step c) is altered by reducing the proportion of clinker and / or adjusted by reducing the grinding fineness defined in step c).

The invention discloses an anti-corrosion cement grinding aid and a preparation method thereof, and belongs to the technical field of cement environment-friendly material processing. The anti-corrosion cement grinding aid comprises water, inorganic components, alcohol amines, alcohols, other organic matters, a cement metal ion catalyst and graphene dispersion liquid. The preparation method comprises the following steps: mixing and dissolving water and inorganic components, sequentially adding alcohol amines, alcohols, the cement metal ion catalyst and other organic matters, fully stirring and uniformly mixing, finally adding graphene dispersion liquid, uniformly stirring to form a uniform system, and detecting to ensure that the system meets the standard. According to the grinding aid, through the synergistic effect of all the components and uniform dispersion of graphene, the grinding efficiency, the early strength of cement and the slump retaining performance are effectively improved, the hydration temperature peak is delayed, and complete hydration is promoted. The cement additive is adjustable in component proportion, adapts to different cement types, does not need equipment transformation, has no pungent smell, and has the characteristics of high efficiency and environmental protection.

A self-flowing castable plugging method belongs to the technical field of refractory construction. According to the type of self-flowing castable, the corresponding accelerator is selected and heated. The preheated accelerator is injected into the leakage point of the mold to form a hardened plugging area. The silica sol type self-flowing castable uses aluminum sulfate type accelerator. The low cement type self-flowing castable uses sodium aluminate type accelerator. According to the measured temperature of the self-flowing castable and the environmental temperature, the preset heating temperature of the accelerator is calculated. The accelerator adding speed is calculated as follows: calculate the self-flowing castable flow rate per minute: calculate the accelerator adding speed per minute: based on the direct correlation of the self-flowing castable leakage flow, the accelerator adding speed is obtained, and the accelerator is pushed out from the multiple openings of the cylinder. In order to expand the shooting area, the needle around the cylinder can be opened. The physical and chemical state of the self-flowing castable at the leakage point is actively changed to make it quickly solidify, fundamentally solving the problem, and the efficiency is much higher than passive waiting.

To obtain highly reliable and objective mass measurement values about each of Portland cement and a blast furnace cement type B even in a production facility only provided with one cement measuring instrument.SOLUTION: In a measurement method for producing concrete equivalent to a blast furnace cement type A by kneading Portland cement, a blast furnace cement type B, an aggregate, water and a chemical admixture by a mixer, the following step S1 and step 2 are executed. In the step S1, either the Portland cement or the blast furnace cement type B is measured by a cement measuring instrument so as to be fed to the mixer. Thereafter, in the step S2, the other of the Portland cement and the blast furnace cement type B is measured by the same cement measuring instrument so as to be fed to the mixer.SELECTED DRAWING: Figure 2

The present invention discloses a shutter for liner ships with heat retention and noise reduction functions, the shutter blades of which are aluminum fiber sound-absorbing panels, the aluminum fiber sound-absorbing panels having uniformly arranged sets of circular through-holes, and foamed particle sound-absorbing balls fitted into the circular through-holes, the foamed particle sound-absorbing balls being composed of 90-105 parts HB polymer cement type JS-II, 4-6 parts carbon powder, 2-3 parts wood chippings, 4-6 parts 9003-35-4 heat-resistant phenolic resin, 6-7 parts heat-resistant glass microspheres, 9-11 parts ultrafine inorganic rock wool fibers, 145-155 parts clean distilled water, and 48-52 parts AC sound-proofing foaming agent. The present invention solves the problem of prior art shutter materials being unable to simultaneously provide light-blocking, sound-absorbing or sound-proofing, and heat-retaining effects.

The invention discloses an intelligent concrete curing system based on concrete strength automatic calculation, and belongs to the technical field of concrete curing. The system aims at solving the problems that in traditional concrete curing, strength prediction lags behind, precision is low, adaptability is poor, and efficiency is low. The system comprises a data acquisition module, a data processing and strength calculation module and a maintenance control module, wherein the data acquisition module acquires temperature parameters through overground / underground temperature sensors; the data processing and strength calculation module calculates maturity based on an equivalent age method, and dynamically adjusts according to the cement type and the environment temperature in combination with a rate constant k related to the cement type; and the maintenance control module compares the calculated strength with a standard maintenance theoretical value, automatically regulates and controls the humidity and temperature of the overground part, increases the temperature when the strength is insufficient, and supports manual intervention to set the temperature. According to the system, precision and automation of concrete curing are achieved, it is guaranteed that the strength is stably increased, and the engineering quality and efficiency are improved.

To provide a method and a device in which, when concrete equivalent to a blast furnace cement A kind is produced using Portland cement and a blast furnace cement B kind, the quality of the concrete can be managed and confirmed.SOLUTION: A quality management method for concrete equivalent to a blast furnace cement A kind comprises steps in which: with the target masses of Portland cement and a blast furnace cement B kind as a first target mass and a second target mass, respectively, the Portland cement and the blast furnace cement B kind are weighed based on the first and second target masses (S2); the weighed Portland cement and blast furnace cement B kind, water, an aggregate and a chemical admixture are kneaded to manufacture concrete equivalent to a blast furnace cement A kind (S7); and the respective mass measured values of the weighed Portland cement and blast furnace cement B kind are recorded in a storage device in association with identification information of the concrete (S5).SELECTED DRAWING: Figure 2

The invention belongs to the technical field of concrete, and discloses a high-workability low-sensitivity viscosity reduction type polycarboxylic acid water reducer as well as a preparation method and application thereof. The polycarboxylic acid type water reducer is prepared from the following raw materials in parts by weight: 100 to 300 parts of polyether monomer, 20 to 40 parts of unsaturated acid monomer, 3 to 10 parts of boric acid-betaine hybrid monomer, 3 to 6 parts of unsaturated amide monomer, 3 to 10 parts of esterification monomer, 5 to 20 parts of functional monomer and 0.8 to 1.5 parts of chain transfer agent, 0.5-2 parts by weight of an oxidizing agent; and 0.2-1 part by weight of a reducing agent. The polycarboxylic acid water reducing agent keeps stable dispersion and rheological properties in a full fluctuation range of cement types, ambient temperature and water consumption, has a wide mixing amount window, excellent workability and low pumping resistance, solves the problem of sensitive blending of traditional PCE from the molecular level, and meets the rigid requirements of super high-rise pumping, quick disassembly of prefabricated parts and all-season construction.

The present invention provides a method for designing a high-crack-resistant concrete mix ratio based on a multi-scale relationship. The method achieves the coordinated unification of concrete strength growth and deformation development by calculating parameters such as the water-cement ratio, fiber content, sand ratio, water consumption, cement type influence coefficient, and admixture influence coefficient based on changes in the type and quality of raw materials, concrete technical index requirements, fiber type and dosage, thereby achieving the purpose of improving the crack resistance of concrete. Compared with existing technologies and methods, the present application can significantly reduce the experimental workload, improve the efficiency of mix design, improve the crack resistance of concrete, and provide algorithm support for the development of intelligent technologies such as concrete expert support systems and early warning systems.