High-magnesium micro-expansive moderate heat Portland cement for water-power engineering and preparation method thereof

A hydropower engineering and micro-expansion technology, which is applied in the field of high-magnesium micro-expansion medium-heat cement for hydropower engineering and its preparation, achieves the effects of reasonable expansion and compensation for temperature drop and shrinkage

Active Publication Date: 2014-04-02
CHINA BUILDING MATERIALS ACAD
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Problems solved by technology

[0007] "Micro-expansion medium-heat Portland cement and its production method" developed by Guangxi Yufeng Cement Co., Ltd. (patent application number: 201210510958.6), the MgO content in the cement is 3.5%-5.0%, and the scientific research and design of building materials in Guizhou Province "A method for producing medium-heat Portland cement" (patent application number: 201010128111.2) developed by the Institute, "A method of

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  • High-magnesium micro-expansive moderate heat Portland cement for water-power engineering and preparation method thereof
  • High-magnesium micro-expansive moderate heat Portland cement for water-power engineering and preparation method thereof
  • High-magnesium micro-expansive moderate heat Portland cement for water-power engineering and preparation method thereof

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Embodiment 1-8

[0036] Embodiment 1-8, Raw material ratio and preparation of high-magnesium micro-expansion medium-heat cement for hydropower projects

[0037] The weight ratio of raw materials for high-magnesium micro-expansion medium-heat cement for hydropower projects is: calcium raw materials 71.09%-75.82%, silicon raw materials 9.54%-9.65%, iron raw materials 2.42%-2.56%, aluminum raw materials 5.51%- 5.91%, magnesia raw material 6.06%-11.41%, the weight ratio of cement clinker and gypsum is: 96.5:3.5-94.5:5.5, wherein,

[0038] The calcareous raw material is selected from one or more combinations of limestone, calcite, and limestone, preferably limestone;

[0039] The siliceous raw material is selected from one or more combinations of silica, shale, and sandstone, preferably silica;

[0040] The iron raw material is selected from one or more combinations of copper tailings and iron powder, preferably copper tailings;

[0041] The aluminum raw material is selected from one or more comb...

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Abstract

The invention discloses a high-magnesium micro-expansive moderate heat Portland cement for water-power engineering and a preparation method thereof. Through control on the grinding fineness of raw materials, sintering temperature of a cement clinker, insulation time, cooling system and cement grinding fineness, reasonable control of expansion effect time and expansion size of periclase in the cement clinker is realized, so that the content of MgO is 3.5%-5%, and periclase size is 2-10 mum. Experiments show that the high-magnesium micro-expansive moderate heat Portland cement for water-power engineering has late expansion mainly occurred 28 days after hydration of the cement and has expansion enhancement in 28-180 days of 0.011%-0.020%, and the expansion time basically fits the late temperature drop stage of large-volume concrete in the water-power engineering, so as to effectively compensate for the late thermal shrinkage of concrete in the water-power engineering.

Description

technical field [0001] The invention belongs to the cement and its preparation method in the technical field of building materials, in particular to a high-magnesium micro-expansion medium-heat cement for hydropower engineering and its preparation method, in particular to a cement which utilizes calcium raw materials, siliceous raw materials, and iron High-magnesium micro-expansion medium-heat cement prepared from raw materials, aluminum raw materials, magnesium raw materials, and gypsum, whose late-stage micro-expansion effect can effectively compensate for the late-stage temperature drop and shrinkage of concrete in hydropower projects. Background technique [0002] As a clean and renewable energy, hydropower is a key energy source for the priority development of my country's electric power industry. At present, there are hundreds of hydropower stations built, under construction or under construction in my country, all of which are designed for a 100-year lifespan. After ...

Claims

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Application Information

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IPC IPC(8): C04B11/30
Inventor 姚燕王显斌文寨军刘云马忠诚刘超王敏
Owner CHINA BUILDING MATERIALS ACAD
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