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A special high-performance cement for nuclear power plant nuclear island and its preparation method

A high-performance, nuclear power plant technology, applied in the field of building materials, can solve problems such as poor sulfate resistance, high cement hydration heat, and cement that cannot meet the needs of nuclear power construction, and achieve the effect of reducing the hydration rate and cement hydration heat

Inactive Publication Date: 2011-12-21
GUANGZHOU ZHUJIANG CEMENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] C 3 A has rapid hydration, high heat release, fast condensation and fast hardening, and C 3 A has large drying shrinkage and poor sulfate resistance
Therefore, C 3 Cement produced by clinker with high A content is not suitable for large-volume projects
And the clinker C produced by the conventional dry method rotary kiln 3 A content is relatively high, generally more than 8%, nuclear power cement requires ≤6%, so general cement cannot meet the needs of nuclear power construction
[0008] 2. High heat of hydration of cement
[0012] 3. The cement hydration rate is fast, which is easy to cause concrete cracks
Common measures include: reducing the temperature of the clinker entering the mill, strengthening the heat dissipation of the grinding system, adding cement grinding aids, strengthening the ventilation of the mill, and using water to cool the mill cylinder, etc., but the cooling efficiency of these measures is not ideal (It is difficult to reduce the cement temperature below 85°C), and the cost is high

Method used

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  • A special high-performance cement for nuclear power plant nuclear island and its preparation method
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  • A special high-performance cement for nuclear power plant nuclear island and its preparation method

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Embodiment 2

[0096] (1) The batching scheme of special high-performance cement for nuclear power plant nuclear island described in the present embodiment is as follows:

[0097] Cement clinker 90.5%, limestone mixture 4.5%, desulfurized gypsum 5.0%. Among them, the formula used for the clinker is KH: 0.910±0.01; SM: 2.00±0.1; IM: 1.00±0.1. The clinker is prepared by calcining the raw meal in a rotary kiln. The ratio of raw meal preparation is 85% limestone, Sand shale 10%, iron ore powder 5%. Al of limestone admixture 2 o 3 ≤2.5%.

[0098] The main components of the clinker are controlled as follows: C 3 S≤57.0%, C 3 A≤6.0%, Cl - ≤0.05%, MgO≤5.0%, SO 3 ≤3.5%, f-CaO≤1.0%.

[0099] (2) the preparation method of special high-performance cement for nuclear power plant nuclear island described in the present embodiment is as follows:

[0100] 1. The control of raw and fuel materials is as in Example 1.

[0101] 2. The quality control points and control items of the production process ...

Embodiment 3

[0117] (1) The batching scheme of special high-performance cement for nuclear power plant nuclear island described in the present embodiment is as follows:

[0118] Cement clinker 92%, limestone mixture 4.0%, desulfurized gypsum 4.0%. The formula used for the clinker is KH: 0.910±0.01; SM: 2.00±0.1; IM: 1.00±0.1. The clinker is prepared by calcining the raw meal in a rotary kiln. The ratio of raw meal preparation is 80% limestone, Sand shale 10%, iron ore powder 10%. Al of limestone admixture 2 o 3 ≤2.5%.

[0119] The main components of the clinker are controlled as follows: C 3 S≤57.0%, C 3 A≤6.0%, Cl - ≤0.05%, MgO≤5.0%, SO 3 ≤3.5%, f-CaO≤1.0%.

[0120] (2) the preparation method of special high-performance cement for nuclear power plant nuclear island described in the present embodiment is as follows:

[0121] 1. The control of raw and fuel materials is as in Example 1.

[0122] 2. The quality control points and control items of the production process are as in Exa...

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Abstract

The invention discloses a special high-performance cement for the nuclear island of a nuclear power plant and a preparation method thereof. The proportion of high-performance cement dedicated to the nuclear island of the nuclear power plant is: cement clinker 90.5%-92.0%, limestone mixed material 4.0%-4.5%, desulfurized gypsum 4.0%-5.0%; among them, the cement clinker formula is: KH=0.910± 0.01, SM=2.0±0.1, IM=1.0±0.1. The preparation method is as follows: preparing raw material through grinding; controlling process parameters, calcining raw material in a rotary kiln to prepare the cement clinker; grinding with a cement mill system to obtain ground cement; cooling. The prepared high-performance cement special for nuclear power plant nuclear island has the advantages of low water demand, low heat of hydration (crack prevention), high durability and the like.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a special high-performance cement for nuclear power plant nuclear islands and a preparation method thereof. Background technique [0002] Cement is one of the three basic materials in the construction industry. It is widely used and used in large quantities. It is known as "the food of the construction industry". Since the practical application of cement industrial products, for one and a half centuries, the production has continued to expand, the technology and equipment have been continuously improved, and the variety and quality have also undergone great development. In recent years, my country's new dry process cement has developed rapidly, and the output of cement is high, and its variety and quality have reached or approached the international advanced level. [0003] People pay more and more attention to the superiority of using nuclear energy to generate ele...

Claims

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Application Information

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IPC IPC(8): C04B7/06
Inventor 林永权王辉诚叶荣朱贤博黎元初房满满
Owner GUANGZHOU ZHUJIANG CEMENT
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