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Quick-setting quick-hardening high-strength low-carbon cement clinker as well as preparation method and application thereof

A low-carbon cement clinker and content technology, applied in the field of cement clinker, can solve the problems of raw material limitation, uneconomical, and difficulty in large-scale production, and achieve low chloride ion content, significant thixotropy, and high compressive strength. Effect

Active Publication Date: 2020-11-13
BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN102584045A discloses an active belite sulphoaluminate cement clinker, the main mineral of which is β-C 2 S (25~30%), α-C 2 S (25-30%), C 4 AF (4~12%) cement clinker is expected to form a large amount of α-C 2 S improves medium-term strength; but the clinker firing conditions are difficult to control
CN1887766A discloses a belite-barium calcium sulphoaluminate cement compounded by barium calcium sulphoaluminate mineral and belite mineral, but limited by raw materials, it is difficult to realize large-scale production
Additionally, studies have shown that mineral admixtures with a high calcined belite content are not economical to use

Method used

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  • Quick-setting quick-hardening high-strength low-carbon cement clinker as well as preparation method and application thereof

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preparation example Construction

[0074] As one of the specific embodiments of the present invention, the preparation method of the quick-setting quick-hardening low-carbon cement clinker includes:

[0075] (1) Use calcareous material, gypsum and silicon-aluminum material to weigh according to a given weight ratio, and then use a ball mill to grind until the particles larger than 90 microns in the mixed raw meal are less than 10%;

[0076] (2) Take out the mixed raw meal, add a small amount of water to the mixed raw meal, after stirring evenly, use a press to press into a test cake with a thickness of about 2 cm and a diameter of 5 cm;

[0077] (3) Put the test cake into a high-temperature electric furnace for calcination, the heating rate of the electric furnace is 15°C / min, and calcine at a constant temperature of 1250-1350°C for 15-60min;

[0078] (4) Slowly cool the clinker in the electric furnace to 1100°C at a rate of about 20°C / min, take it out, and quickly cool it to room temperature at a rate of not l...

Embodiment 1

[0081] A preparation method of cement clinker, the steps are as follows:

[0082] (1) Use low-grade limestone, desulfurized gypsum, molybdenum tailings and industrial solid waste mineralizer containing calcium fluoride to mix according to the mass fraction of 72.5%: 20%: 7%: 0.5%, and use a ball mill to grind to the mixture Particles larger than 90 microns in less than 1% of the total weight;

[0083] (2) Add a small amount of water to the mixture, stir it evenly, and press it into a test cake with a thickness of about 2cm and a diameter of 5cm with a press;

[0084] (3) Put the test cake into a high-temperature electric furnace for calcination. The heating rate of the electric furnace is 15°C / min, and it is calcined at 1330°C for 55 minutes. Then it is cooled in the electric furnace to 1100°C at a cooling rate of about 20°C / min, and then cooled rapidly. to room temperature.

[0085] After testing, the crystalline phase accounts for 88.7% and the amorphous phase accounts for...

Embodiment 2

[0095] A preparation method of cement clinker, the steps are as follows:

[0096] (1) Adopt papermaking lime mud, desulfurization gypsum, gold tailings and industrial solid waste mineralizer containing calcium fluoride and zinc oxide to mix according to the ratio of 69%: 19%: 10%: 2%, and grind to Particles larger than 90 microns in the mixture are less than 1% of the total weight;

[0097] (2) Then, add a small amount of water in the mixture, after stirring evenly, press it into a test cake with a thickness of about 2cm and a diameter of 5cm with a press;

[0098] (3) Then, put the test cake into a high-temperature electric furnace for calcination. The heating rate of the electric furnace is 15°C / min, and it is calcined at 1320°C for 35 minutes, and then cooled to 1100°C in the electric furnace at a cooling rate of about 20°C / min, and then Rapid cooling to room temperature;

[0099] After testing, the crystalline phase accounts for 90.4% and the amorphous phase accounts for...

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Abstract

The invention belongs to the technical field of cement clinker, and particularly relates to quick-setting quick-hardening high-strength low-carbon cement clinker as well as a preparation method and application thereof. The low-carbon cement clinker comprises the following components in percentage by mass: more than or equal to 85% of a crystalline phase and less than or equal to 15% of an amorphous phase. In the crystalline phase, in terms of the low-carbon cement clinker, the content of tricalcium silicate is 15-45%; the content of calcium oxide is 0-5%; the content of calcium sulphosilicatedoped with ferric oxide is 5-50%; and the content of calcium sulphoaluminate is 15-45%; the content of calcium aluminoferrite is 2-15%. The amorphous phase is a CaO-Al2O3-SiO2-SO3-Fe2O3 solid solutionglass body. By designing five specific crystalline phase structures and controlling the content ratio of the five crystalline phase structures, a low-carbon cementing material prepared from the obtained low-carbon cement clinker has higher compressive strength in a short time, and the compressive strength is remarkably superior to existing similar cement clinkers; and meanwhile, the low-carbon cement clinker disclosed by the invention also has the excellent characteristics of remarkable thixotropy, low alkali and low chloride ion content.

Description

technical field [0001] The invention belongs to the technical field of cement clinker, and in particular relates to a quick-setting, quick-hardening and high-strength low-carbon cement clinker, a preparation method and application thereof. Background technique [0002] In order to shorten the construction period as much as possible, quick-setting quick-hard cementitious materials are of great significance in building decoration, municipal engineering repair and rush construction, road and bridge repair, and as emergency reserve technology and materials in wartime. [0003] Up to now, many active mineral admixture technologies for producing dicalcium silicate minerals have been studied at home and abroad. For example, CN105669056A discloses that by high activity Ternary mineral clinker system, the 3d strength of the system exceeds 30MPa, and the 28d strength is about 60MPa. CN102584045A discloses an active belite sulphoaluminate cement clinker, the main mineral of which ...

Claims

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Application Information

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IPC IPC(8): C04B7/24C04B7/345C04B7/36C04B7/44
CPCC04B7/24C04B7/345C04B7/36C04B7/44Y02P40/10
Inventor 刘艳军徐瑞来李沙李润丰
Owner BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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