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High-durability gelatinization addition and preparation method thereof

A technology of durability and admixture, applied in the field of cementitious admixture and its preparation, can solve the problems of high price and high price of silica fume, improve the antifreeze performance and impermeability performance, low cost, and improve the gelling water. The effect of the ability to

Inactive Publication Date: 2007-05-23
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Silica fume is expensive, and is generally rarely used as a cementitious admixture in large quantities; compared with steel slag and fly ash, mineral powder has higher activity, but its price is relatively high

Method used

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  • High-durability gelatinization addition and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: as shown in Figure 1, the preparation method of high durability gelled admixture comprises the steps:

[0018] 1). Preparation of calcined phosphogypsum: Phosphogypsum (CaSO 4 Content 89.3%, P 2 o 5 content 2.16%), calcined at 780°C for 30 minutes to make calcined phosphogypsum powder.

[0019] 2). Preparation of steel slag powder: in the process of processing converter steel slag (with free CaO weight content of 5.12% and MgO weight content of 6.40% by shallow plate water quenching process) in the iron and steel industry, the steel slag was soaked in saturated water for 7 days. It is taken out of the slag pool, stacked naturally until the water weight content is 13.5%, and then crushed, screened, dried, and magnetically separated to remove iron before each process. The Blaine specific surface area is 400m 2 / kg.

[0020] 3). Selection of high-calcium fly ash: choose high-calcium fly ash with a CaO weight content of 39.8% and a free CaO weight content of...

Embodiment 2

[0029] The preparation method of high durability gelled admixture comprises the following steps: 1). The preparation of calcined phosphogypsum: CaSO 4 The weight content is 80%-95%, P 2 o 5 Phosphogypsum with a weight content of ≤2.6% is calcined at 750°C-850°C for 20-40 minutes to obtain calcined phosphogypsum powder, which is ready for use; 2). Preparation of steel slag powder: In the iron and steel industry, the converter is treated with a shallow pan water quenching process During the process of steel slag (free CaO weight content ≤ 6%, MgO weight content 4%-8%), when soaked in water for 7 days, steel slag is taken out from the slag pool, and naturally stacked until the water weight content is lower than 15%, and then crushed, screened, dried and made by magnetic separation and iron removal before each process. Blaine's specific surface area is 300-600m 2 / kg; 3). The selection of high-calcium fly ash: the high-calcium fly ash obtained by the dry coal ash of the power pl...

Embodiment 3

[0031] The preparation method of high durability gelled admixture comprises the following steps: 1). The preparation of calcined phosphogypsum: CaSO 4 The weight content is 80%-95%, P 2 o 5 Phosphogypsum with a weight content of ≤2.6% is calcined at 750°C-850°C for 20-40 minutes to obtain calcined phosphogypsum powder, which is ready for use; 2). Preparation of steel slag powder: In the iron and steel industry, the converter is treated with a shallow pan water quenching process During the process of steel slag (free CaO weight content ≤ 6%, MgO weight content 4%-8%), when soaked in water for 7 days, steel slag is taken out from the slag pool, and naturally stacked until the water weight content is lower than 15%, and then crushed, screened, dried and made by magnetic separation and iron removal before each process. Blaine's specific surface area is 300-600m 2 / kg; 3). The selection of high-calcium fly ash: the high-calcium fly ash obtained by the dry coal ash of the power pl...

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Abstract

The invention relates to a gelatinization blended material and method for preparation, wherein the raw material comprises the following constituents (by weight portions): calcined ardealite 3-5 parts, high calcium coal ash 50-70 parts, steel slag powder 30-50 parts, and triethanolamine 0.02-0.04 part.

Description

technical field [0001] The invention relates to a gelled admixture and a preparation method thereof. Background technique [0002] After decades of construction at home and abroad, it is found that the concrete industry generally has the phenomenon that buildings are damaged due to poor durability during use and cause serious economic losses. The durability problems of concrete structures in our country are extremely prominent, mainly including steel bar corrosion, freezing damage plus steel bar corrosion, alkali-aggregate reaction, salt erosion, mass concrete cracks and other destructive behaviors. From 1981 to 1985, Nanjing Institute of Water Sciences, Beijing Institute of Water Sciences, Yangtze River Academy of Sciences, East China Institute of Water Conservancy, the First Navigation Bureau of the Ministry of Communications, and the Research Institute of the Fourth Navigation Bureau successively conducted large-scale surveys on small and medium-sized sluices and seaport ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14C04B22/00C04B111/72C04B103/65
Inventor 马保国白建飞朱洪波李相国王信刚
Owner WUHAN UNIV OF TECH
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