6 results about "Cement type" patented technology

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 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.