Energy-saving cement and preparation method therefor

A cement and raw material technology, applied in the field of energy-saving cement and its preparation, can solve the problems of unfavorable high compressive strength concrete mixture, steel slag utilization rate less than 17%, and large accumulation of steel slag, so as to achieve high compressive strength and increase strength , The effect of improving productivity and efficiency

Inactive Publication Date: 2019-12-03
天津市金晟华水泥股份有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the annual discharge of steel slag in my country can reach hundreds of millions of tons, but the utilization rate of steel slag is less than 17%, resulting in a large amount of steel slag accumulation
[0004] However, adding steel slag to energy-saving cement, in the concrete mixture p

Method used

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  • Energy-saving cement and preparation method therefor
  • Energy-saving cement and preparation method therefor

Examples

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Example Embodiment

[0047] Example 1

[0048] An energy-saving cement, in parts by weight, includes the following raw material components: 73 parts of Portland cement clinker, 8 parts of gypsum, 1 part of limestone, 10 parts of mineral powder, 1 part of sodium hydroxide, and 20 parts of steel slag powder;

[0049] The preparation of the steel slag powder includes the following steps: the steel slag raw material is ground to obtain steel slag powder with a particle size of ≤0.5 mm, and during the grinding process, a grinding aid combination additive accounting for 1% of the weight of the steel slag raw material is added, wherein the grinding aid The combined additives include fly ash and colloidal graphite powder, and the mass ratio of fly ash and colloidal graphite powder is 1:0.3;

[0050] The preparation method of energy-saving cement includes the following steps:

[0051] a. Preparation of steel slag powder;

[0052] b. After mixing the raw material components of the energy-saving cement, the energy-sa...

Example Embodiment

[0053] Example 2

[0054] An energy-saving cement, in parts by weight, includes the following raw material components: 80 parts of Portland cement clinker, 5 parts of gypsum, 3 parts of limestone, 7 parts of mineral powder, 3 parts of sodium hydroxide, and 17 parts of steel slag powder;

[0055] The preparation of the steel slag powder includes the following steps: the steel slag raw material is ground to obtain a steel slag powder with a particle size of ≤0.5 mm, and during the grinding process, 2% of the weight ratio of the steel slag raw material is added with a combined grinding aid additive, wherein the grinding aid The combined additives include fly ash and colloidal graphite powder, and the mass ratio of fly ash and colloidal graphite powder is 1:1;

[0056] The preparation method of energy-saving cement includes the following steps:

[0057] a. Preparation of steel slag powder;

[0058] b. After mixing the raw material components of the energy-saving cement, the energy-saving c...

Example Embodiment

[0059] Example 3

[0060] An energy-saving cement, in parts by weight, includes the following raw material components: 86 parts of Portland cement clinker, 2 parts of gypsum, 5 parts of limestone, 5 parts of mineral powder, 5 parts of sodium hydroxide, and 15 parts of steel slag powder;

[0061] The preparation of the steel slag powder includes the following steps: the steel slag raw material is ground to obtain steel slag powder with a particle size of ≤0.5 mm, and during the grinding process, 2.5% of the weight of the steel slag raw material is added with a combined grinding aid additive, wherein the grinding aid The combined additives include fly ash and colloidal graphite powder, and the mass ratio of fly ash and colloidal graphite powder is 1:0.3;

[0062] The preparation method of energy-saving cement includes the following steps:

[0063] a. Preparation of steel slag powder;

[0064] b. After mixing the raw material components of the energy-saving cement, the energy-saving cemen...

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Abstract

The invention discloses energy-saving cement and a preparation method therefor. The cement comprises the ingredients in parts by weight: 73-86 parts of silicate cement clinker, 2-8 parts of gypsum, 1-5 parts of limestone, 5-10 parts of mineral powder, 1-5 parts of sodium hydroxide and 15-20 parts of steel slag powder, wherein the steel slag powder is obtained through subjecting a steel slag raw material to pulverizing treatment, and a pulverizing assisting combined additive, which accounts for 1% to 2.5% the weight of the steel slag raw material, is added during pulverizing treatment; and thepulverizing assisting combined additive comprises fly ash and colloidal graphite powder which are in a mass ratio of 1: (0.3 to 1.5). The energy-saving cement may also comprise 10-15 parts of modifiedhollow glass beads, wherein the modified hollow glass beads are obtained through treating hollow glass beads with a silane coupler. The preparation method for the cement comprises the steps: preparing the steel slag powder; preparing the modified hollow glass beads; and mixing raw material ingredients of the cement, and then, carrying out cement pulverizing, thereby preparing the energy-saving cement. According to the energy-saving cement and the preparation method therefor, a large volume of steel slag powder is adopted, the waste utilization of the steel slag is achieved, and the blended concrete mixture has the characteristic of high compressive strength.

Description

technical field [0001] The invention relates to the technical field of concrete building materials, in particular to an energy-saving cement and a preparation method thereof. Background technique [0002] Steel slag is a waste slag discharged during the steelmaking process. At present, the annual discharge of steel slag in my country can reach hundreds of millions of tons, but the utilization rate of steel slag is less than 17%, resulting in a large accumulation of steel slag. The accumulated steel slag not only takes up a lot of land resources, but also causes serious environmental pollution. [0003] The composition of steel slag mainly includes the furnace lining material eroded during the steelmaking process, oxides formed by molten iron and metal elements contained in scrap steel, sediment, slagging agents, coolants, oxidants, deoxidation products, desulfurization products, etc. Steel slag has excellent properties such as high compressive strength, high hardness, good...

Claims

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Application Information

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IPC IPC(8): C04B7/21C04B7/52
CPCC04B7/21C04B7/52Y02P40/10
Inventor 张建华胡春才
Owner 天津市金晟华水泥股份有限公司
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