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Composite cement and preparation method thereof

A technology of composite cement and Portland cement, applied in the field of cement, can solve the problems of decreased compressive strength and flexural strength, unable to reduce too fine cement particles, consumption of electricity of ball mills, etc. Reasonable particle size distribution and improved particle size distribution

Active Publication Date: 2020-12-04
湖州昂狮环保有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] If the particles are too fine, the ball mill needs to consume more electricity, which will significantly affect the output of the ball mill, and also affect the pouring performance
However, the addition of cement grinding aids cannot reduce the generation of superfine particles in cement. Therefore, the composite Portland cement after grinding contains more superfine particles, resulting in a decrease in the output of the ball mill. decline

Method used

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  • Composite cement and preparation method thereof
  • Composite cement and preparation method thereof
  • Composite cement and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Embodiment 1: A kind of composite cement is prepared by the following process:

[0058] S1: Take 15kg of triethanolamine and 8kg of triisopropanolamine and add them to the reaction kettle, stir and mix evenly, add 50kg of water to dilute and stir, then add 15kg of industrial salt, 7kg of sodium sulfate and 5kg of sodium thiosulfate and mix well , make grinding aid; S2: get the fatty alcohol polyoxyethylene ether (nonionic surfactant) of 0.03kg and mix with the grinding aid that 0.05kgS1 makes, stir, make grinding aid;

[0059] S3: Take 61.6kg of Portland cement clinker, 6kg of dihydrate gypsum (gypsum), 12kg of limestone powder and 4kg of fly ash for rolling, after rolling, sieve, and roll the material with a particle size > 2mm again , until a fine powder with particle size ≤ 2mm is obtained;

[0060] S4: adding the grinding aid additive obtained in S2, the fine powder obtained in S3, and 0.32 kg of graphite powder with an average particle size of 5 μm into a ball mil...

Embodiment 2

[0064] Embodiment 2: a kind of composite cement is prepared by the following process:

[0065] A1: Take 15kg of triethanolamine and 8kg of triisopropanolamine and add them to the reaction kettle and mix them evenly, add 50kg of water to dilute and stir, then add 15kg of industrial salt, 7kg of sodium disulfide and 5kg of sodium thiosulfate and mix well , to prepare grinding aids.

[0066] A2: Get 0.03kg of fatty alcohol polyoxyethylene ether (nonionic surfactant) and mix with 0.05kg of the grinding aid prepared by step A1, stir evenly, and make the grinding aid;

[0067] A3: Take 61.6kg of Portland cement clinker, 6kg of dihydrate gypsum (gypsum), 12kg of limestone powder, 4kg of fly ash, and 0.32kg of graphite micropowder and add them into the ball mill 1 for grinding from the feed pipe 5, and grind them in the ball mill 1 made by A2. The grinding aid additive obtained is sprayed in the tail bin 34 of the ball mill 1 from the discharge pipe 6 through the spraying device 8 to...

Embodiment 3

[0069] Example 3: A composite cement, the difference from Example 1 is that glycerol monostearate is selected as the nonionic surfactant to replace the fatty alcohol polyoxyethylene ether in step S2.

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Abstract

The invention relates to the technical field of cement, and particularly discloses composite cement and a preparation method thereof, wherein the composite cement comprises the following components inpercentage by mass: 55-63 parts of Portland cement clinker, 5-8 parts of gypsum, 15-19 parts of superfine slag powder, 4-10 parts of fly ash, 10-15 parts of limestone powder, 0.03-0.06 part of a grinding aid, 0.01- 0.03 part of a non-ionic surface active agent, and 0.2-0.5 part of graphite micro powder. The composite cement provided by the invention contains less ultrafine particles and over-coarse particles, has high content of 3-32 [mu]m intermediate particles, and has more reasonable grain composition, so that the strength of the cement is significantly improved.

Description

technical field [0001] The application relates to the technical field of cement, more specifically, it relates to a composite cement and a preparation method thereof. Background technique [0002] Composite Portland cement is a hydraulic cementitious material made by grinding Portland cement clinker, two or more specified admixtures and an appropriate amount of gypsum. It is called composite Portland cement (abbreviated as composite cement). Grinding is a particularly important step in cement production. It uses a ball mill to grind cement clinker, gypsum and mixed admixtures to a suitable fineness to meet the hardening, strength and durability indicators of cement paste. [0003] If the fineness of the composite Portland cement after grinding is too large and the particles are too coarse, it will not be conducive to the exertion of cement activity; The grinding resistance of Portland cement raw materials can be solved, and the addition of cement grinding aids can reduce t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/21C04B7/26
CPCC04B7/21C04B7/26Y02P40/10
Inventor 王雪铨
Owner 湖州昂狮环保有限公司