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High-iron-phase Portland cement product and preparation method thereof

A technology of Portland cement and high-iron phase, which is applied in the field of building materials, can solve problems such as the inability to prepare ultra-high-strength cement concrete carbonized products, and achieve the effects of short production cycle, wide source of raw materials, and simple method

Active Publication Date: 2021-08-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, it is necessary to provide a high-iron phase Portland cement product and its preparation method to solve the technical problem that ordinary Portland cement cannot prepare carbonized products with ultra-high strength cement concrete in the prior art

Method used

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  • High-iron-phase Portland cement product and preparation method thereof
  • High-iron-phase Portland cement product and preparation method thereof
  • High-iron-phase Portland cement product and preparation method thereof

Examples

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preparation example Construction

[0012] A first aspect of the invention provides a method for preparing a high-speed rail-phase silicate cement product, comprising the steps of:

[0013] The high-speed rail-phase silicate cement clinker and water were mixed after mixing, and stirred into a wet material after mixing, then placed the wet material in the mold, and then placed in the blank again. Accelerated carbonization treatment was carried out in a carbonized maintenance chamber to obtain a high-speed rail-phase silicate cement product; wherein the mineral composition of the above high-speed rail-phase silicate cement clinker is: silicate 20-33%, α-silicate 2- 8%, γ-silicon silicate 36-41%, three calculations of aluminate acid, iron aluminate, 200-35%. Preferably, the mineral composition of the above-mentioned high-speed rails of the silicate cement clinker is: 3-25% of silicate, α-silicon silicate 3-6%, γ-silicate 38-41%, aluminate Three calcium 1-3%, ferro-aluminated acid quartet calcium 29-35%. More preferably...

Embodiment 1

[0025] This example provides a high-speed rail-phase silicate cement product which is obtained by the following steps:

[0026] (1) 90.13 limestones, 6.46 iron ore and 1.41 sandstones were broken, emitted, ingredient, and ore chemifiers (CAF) 2 After 2 copies of powder and homogenization, the preheater and the decomposition furnace transferred into the rotary kiln, quenched after calcination at 1250 ° C for 20 minutes, and the high-speed iron-phase silicate cement clinker is obtained.

[0027] (2) After mixing 87 parts of the high-speed rails of the silicate cement, mixed with 13 parts of the tap water, stir well, then placed the wet material in a constant shape of the mold, the blank is 400 × 400 × 20mm sheet, molding pressure 20MPa, molding time is 5 minutes; the blank is placed in a carbonized maintenance chamber for accelerated carbonization treatment, and the condition of carbonization is 20 ° C, and the relative humidity is 75%, the carbon dioxide concentration is 75%, and t...

Embodiment 2

[0029] This example provides a high-speed rail-phase silicate cement product which is obtained by the following steps:

[0030] (1) 92.11 limestones, 6.05 iron ore, 8.36 sandstones were combined, and the mineralization agent was added. 4 After 1 case, powder milling and homogenization, the preheater and the decomposition furnace transferred into the rotary kiln, and quenched after 20 minutes at 1280 ° C for 20 minutes, high-speed iron-phase silicate cement clinker;

[0031](2) 85 parts and 15 parts of the above-mentioned high-speed, and 15 parts of the above-mentioned high-speed, and the mixture was mixed and uniformly made of a wet material, and then the wet material was placed in a certain shape of the mold pressed blank, the green body was 400 × 400 × The 100mm sheet, the molding pressure is 70MPa, the molding time is 6 minutes; the blank is placed in a carbonized maintenance chamber for accelerated carbonization treatment, the condition of carbonization is 30 ° C, relative hum...

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Abstract

The invention discloses a high-iron-phase Portland cement product and a preparation method thereof. The preparation method comprises the following steps of mixing high-iron-phase Portland cement clinker and water according to a mass ratio of 1: (0.15-0.25), uniformly stirring to prepare a wet material, putting the wet material into a mold, pressing into a green body, putting the green body into a carbonization curing chamber, and carrying out accelerated carbonization treatment to obtain a high-iron-phase Portland cement product. The high-iron-phase Portland cement clinker is prepared from the following minerals in percentage by weight: 20 to 33 percent of tricalcium silicate, 3 to 8 percent of alpha-dicalcium silicate, 36 to 41 percent of gamma-dicalcium silicate, 1 to 3 percent of tricalcium aluminate and 18 to 35 percent of tetra calcium aluminoferrite. The high-iron-phase Portland cement product is prepared by selecting the cement clinker with specific composition, and the high-iron-phase Portland cement product with ultrahigh strength and corrosion resistance is formed under the combined action of mineral phase carbonization and hydration; and the method is simple, wide in raw material source and short in production period.

Description

Technical field [0001] The present invention relates to the technical field of building materials, and more particularly to high-speed rail-phase silicate cement articles and a preparation method thereof. Background technique [0002] Cement is the main raw material for construction and infrastructure construction. The cement industry is considered to be one of the highest in the world's carbon dioxide emissions, and its emissions account for about 25% of the total emissions of the global industrial sector. At present, mineral blending replacement cement use is an effective means of reducing cement production emissions and energy consumption problems, but in the upper limit of the amount of replacement in mixed cement, it will affect the early strength of the test piece, and cannot fundamentally solve the problem. Therefore, it is the direction of the future cement industry in the future cement industry. New silicate hydrogendic materials developed by low energy and low emissions...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/42C04B7/22C04B7/04C04B7/02
CPCC04B7/425C04B7/22C04B7/04C04B7/02Y02P40/10
Inventor 王发洲张克昌杨露胡曙光王加军饶美娟余松柏何永佳商得辰汪宣乾
Owner WUHAN UNIV OF TECH
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