Low-heat micro-expansive cement

A technology of micro-expansion and cement, which is applied in the direction of cement production, etc., can solve the problems of high price of granulated blast furnace slag and increase of cement production cost, and achieve prevention of apparent cracks and cracking of foundation blocks, rapid strength development, and good impermeability Effect

Active Publication Date: 2013-07-31
EMEISHAN QIANGHUA SPECIAL CEMENT
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Most of the existing technologies represented by the above-mentioned patent documents use high-quality granulated blast furnace slag as the main raw material, but because the high-quality slag resources required for the production of low-heat micro-expansion cement are becoming less and less, the price of granulated blast furnace slag is also increasing. The higher the higher, resulting in a corresponding increase in the production cost of cement

Method used

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Examples

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Embodiment 1

[0039] As a preferred embodiment of the present invention, the present invention discloses a low-heat micro-expansion cement, which is prepared by mixing the following components in parts by weight:

[0040] Vanadium titanium slag: 10 parts;

[0041] Phosphorus slag: 5 parts;

[0042] Granulated blast furnace slag: 40 parts;

[0043] Cement clinker: 32 parts;

[0044] plaster or anhydrite: 11;

[0045] With other admixtures: 2 servings.

[0046] Using the above formula, the low heat micro expansion cement whose physical properties meet the requirements of the GB2938 cement standard can be prepared through the general method for preparing low heat micro expansion cement in this field.

Embodiment 2

[0048] As the best embodiment of the present invention, it is prepared by mixing the following components by weight:

[0049] Vanadium titanium slag: 15 parts;

[0050] Phosphorus slag: 5 parts;

[0051] Granulated blast furnace slag: 39 parts;

[0052] Cement clinker: 30 parts;

[0053] Gypsum or Anhydrite: 10; and

[0054] Other admixtures: 1 part.

[0055] The other admixtures mentioned refer to fly ash or lightly burned MgO. The vanadium-titanium slag is a commercially available product produced by Sichuan Panzhihua Vanadium-Titanium Mineral Co., Ltd. The phosphorus slag is the phosphorus rock slag discharged from high-temperature calcination, and the phosphorus slag in the phosphorus slag 2 o 5 Control it below 3%. The granulated blast furnace slag is a molten product mainly composed of silicates and aluminosilicates obtained during smelting pig iron in a blast furnace. The cement clinker is Portland cement clinker. The main chemical composition is calcium oxide...

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Abstract

The invention discloses low-heat micro-expansive cement and relates to the technical field of engineering materials. The low-heat micro-expansive cement is prepared by mixing the following components in parts by weight: 2-30 parts of vanadium-titanium mineral slag, 2-30 parts of phosphorus slag, 20-62 parts of granulated blast furnace slag, 18-45 parts of cement clinker, 7-15 of gypsum or anhydrite and 0.2-5 parts of other additives. The low-heat micro-expansive cement disclosed by the invention is adopted, thus vanadium-titanium slag resources are comprehensively utilized; and under the condition that the resources are deficient, the vanadium-titanium slag, the phosphorus slag and the like are used to replace the formula of the existing low-heat micro-expansive cement, thus production cost is reduced, and the physical property of the produced cement meets the requirement of GB2938 cement standard.

Description

technical field [0001] The invention relates to the technical field of engineering materials, in particular to a low-heat micro-expansion cement. Background technique [0002] The hydraulic cementitious material with low heat of hydration and micro-expansion properties made of granulated blast furnace slag as the main component, added with appropriate amount of Portland cement clinker and gypsum, is called low-heat micro-expansion cement. It is mainly suitable for concrete and mass concrete that require low heat of hydration and compensation for shrinkage, and is also suitable for projects that require impermeability and sulfate corrosion resistance. [0003] For example, the publication number is CN1175559, and the publication date is that the Chinese patent literature on March 11, 1998 discloses a low-heat micro-expansion cement whose raw material composition includes cement clinker, granulated blast furnace slag and phosphorus slag, hemihydrate gypsum or Soluble anhy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/21
CPCY02P40/10
Inventor 喻庆华李明泽陈学东王霞王雷刘春香黄娟
Owner EMEISHAN QIANGHUA SPECIAL CEMENT
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