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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AI-Extracted Technical Summary

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...
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Method used

(1) the present invention has adopted a large amount of steel slag powder in cement, and the steel slag powder itself that is made of steel slag raw material has higher compressive strength, can substantially improve the compressive strength of concrete mixture;
(2) the main chemical composition of hollow glass microsphere comprises silicon-dioxide, aluminum oxide, and in its modified treatment process, silane coupling agent carries out modified treatment to the surface of hollow glass microsphere, and hollow glass microsphere The silica and alumina components on the surface are activated by the silane coupling agent to form activated silica and activated alumina. And in the energy-saving cement formula of the present invention, gypsum is used as retarder, and main chemical composition is the hydrate of calcium sulfate. When the energy-saving cement of the present invention is used to prepare concrete mixture, under the action of added mix...
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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.

Application Domain

Technology Topic

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

Examples

  • Experimental program(6)
  • Comparison scheme(2)
  • Effect test(1)

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-saving cement is prepared by cement grinding.

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 cement is prepared by cement grinding.

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 cement is prepared by cement grinding.
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Description & Claims & Application Information

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