A kind of white expansion agent for decorating concrete and preparation method thereof

A technology for decorative concrete and expansion agent, applied in the field of white expansion agent, can solve the problems of not being able to compensate for shrinkage cracking of decorative concrete, low whiteness, etc.

Active Publication Date: 2021-04-20
ZHENJIANG SOBUTE NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems that the existing expansion agent products have low whiteness, various colors and cannot be used to compensate shrinkage and cracking of decorative concrete, the present invention provides a white expansion agent with high whiteness and high expansion efficiency, which can be used to compensate shrinkage and cracking of decorative concrete and its preparation method

Method used

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  • A kind of white expansion agent for decorating concrete and preparation method thereof
  • A kind of white expansion agent for decorating concrete and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0019] First, 60 parts of low-iron high-calcium limestone, 40 parts of mold gypsum and 2 parts of composite mineralizer are mixed in proportion and then ground into raw meal powder with a fineness of 250 mesh, wherein the composite mineralizer has a mass fraction of 40 % calcium chloride and 60% barium sulfate; the raw meal powder is calcined at high temperature in a rotary kiln with petroleum coke as fuel, the calcining temperature is set at 1250°C, and the calcining time is set at 90 minutes, and calcined in the rotary kiln The fired clinker is unloaded from the kiln head, and is rapidly air-cooled by a single-tube cooler to obtain expanded clinker; finally, the expanded clinker is ground to a specific surface area of ​​350m 2 / kg, a kind of white expansion agent embodiment WEA-1 for compensating decorative concrete of the present invention is obtained.

Embodiment 2

[0021] First, 65 parts of low-iron and high-calcium limestone, 35 parts of mold gypsum and 2 parts of composite mineralizer are mixed in proportion and then ground into raw meal powder with a fineness of 280 meshes, wherein the composite mineralizer has a mass fraction of 50 % calcium chloride and 50% barium sulfate; the raw meal powder is calcined at high temperature in a rotary kiln with petroleum coke as fuel, the calcining temperature is set at 1300°C, and the calcining time is set at 75 minutes, and then calcined in a rotary kiln The fired clinker is unloaded from the kiln head, and is rapidly air-cooled by a single-tube cooler to obtain expanded clinker; finally, the expanded clinker is ground to a specific surface area of ​​325m 2 / kg, a kind of white expansion agent embodiment WEA-2 for compensating decorative concrete of the present invention is obtained.

Embodiment 3

[0023] First, 70 parts of low-iron and high-calcium limestone, 30 parts of mold gypsum and 3 parts of composite mineralizer are mixed in proportion and then ground into raw meal powder with a fineness of 300 mesh, wherein the composite mineralizer has a mass fraction of 55 % calcium chloride and 45% barium sulfate; the raw meal powder is calcined at high temperature in a rotary kiln with petroleum coke as fuel, the calcining temperature is set at 1350°C, and the calcining time is set at 60 minutes, and calcined in the rotary kiln The fired clinker is unloaded from the kiln head, and is rapidly air-cooled by a single-tube cooler to obtain expanded clinker; finally, the expanded clinker is ground to a specific surface area of ​​300m 2 / kg, a kind of white expansion agent embodiment WEA-3 for compensating decorative concrete of the present invention is obtained.

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Abstract

The invention discloses a white expansion agent for decorating concrete and a preparation method thereof. The white expansion agent of the present invention uses low-iron and high-calcium limestone as a calcium raw material, mold gypsum as a sulfurous raw material, and a composite mineralizer as a liquid phase adjustment material, which is composed of low-iron and high-calcium limestone in parts by weight 60-75 25-40 parts of mold gypsum and 2-4 parts of composite mineralizer. The raw meal powder is calcined at a temperature of 1250-1350°C. The white expansion agent product of the present invention has high whiteness, high expansion efficiency, and good color adaptability to decorative concrete, which provides a guarantee for the application of the expansion agent product in decorative concrete, can effectively compensate for the shrinkage of decorative concrete, and improves the decorative effect. The crack resistance of concrete fills the blank of expansion agent products in the field of decorative concrete, and has broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of application of special cement, and in particular relates to a white expansion agent for improving the anti-crack performance of decorative concrete. Background technique [0002] With the advancement of science and technology, it has become a fashion trend for concrete materials to develop into multi-color, multi-shape, and artistic, and its application methods have expanded to all aspects of people's lives. Because of its white color, white cement is easy to mix with various mineral pigments to make colored cement or colored concrete, which can be customized or cast on site. It has become a decorative concrete material that people are willing to use. In recent years, decorative concrete projects have widely involved various types of decorative concrete products, such as white fair-faced concrete, colored UHPC, colored prestressed concrete hanging panels, and integrated decorative and thermal insulation c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B22/14
CPCC04B40/0046C04B22/064C04B22/143C04B22/124C04B22/142
Inventor 张守治朱剑南王育江王瑞李华姚婷穆松
Owner ZHENJIANG SOBUTE NEW MATERIAL CO LTD
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