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Expanding clinker, expanding agent, concrete and preparation method of expanding clinker

A technology of expanded clinker and expansion agent, applied in the field of expanded clinker, can solve the problems of ring formation in the kiln and waste of resources, etc.

Active Publication Date: 2011-10-19
武汉三源特种建材有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of method needs to add gypsum during the clinker firing process, which may cause ring formation in the kiln, resulting in a waste of resources

Method used

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  • Expanding clinker, expanding agent, concrete and preparation method of expanding clinker
  • Expanding clinker, expanding agent, concrete and preparation method of expanding clinker
  • Expanding clinker, expanding agent, concrete and preparation method of expanding clinker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0122] The preparation of embodiment 1-1 expansion clinker 1-3

[0123] By weight percentage 93%: 7%, 95%: 5%, 98%: 2%, limestone and iron powder are mixed, based on the total weight of limestone and iron powder, its chemical composition is shown in Table 1, and jointly ground to fine The sieve with a 0.08mm square hole is less than 18%, and the specific surface area is 180-300m 2 / kg, and then calcined at 1400°C in a preheating decomposition kiln to obtain expanded clinker 1-3, its chemical composition is shown in Table 2, and its calculated mineral composition is shown in Table 3. The data listed are based on the total amount of expanded clinker weight percent by weight.

[0124] Table 1

[0125] raw material

[0126] Table 2

[0127]

[0128] * : The silica content is affected by the raw coal.

[0129] table 3

[0130] Expanded clinker

[0131]

[0132] Expanding agent example

Embodiment 2-1

[0133] Example 2-1 Expansion agent 1

[0134] The expansion clinker 1 is directly used as the expansion agent 1.

Embodiment 2-2

[0135] Example 2-2 Expansion agent 2

[0136] The expanded clinker 1 was mixed with 5% anhydrite, 0.1% sodium gluconate and 0.1% lauric acid and ground to a specific surface area of ​​327m 2 / kg to obtain expansion agent 2, said percentage is based on the total weight of expansion clinker 1, anhydrite, sodium gluconate and lauric acid.

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Abstract

The invention relates to expanding clinker. The expanding clinker is formed by mixing and calcining raw materials of lime stone and iron powder, wherein in the raw materials, the calcium carbonate content based on the calcium oxide (CaO) content is 48 to 53 weight percent; the ferric oxide (Fe2O3) content is 1 to 5 weight percent; and the weight percentage is based on the total weight of the lime stone and the iron powder. The invention also relates to an expanding agent containing the expanding clinker and a preparation method of the expanding clinker. The invention further relates to an expanding agent containing the expanding clinker or the expanding agent provided by the invention.

Description

technical field [0001] The application relates to an expanded clinker, which is calcined by mixing limestone and iron powder as raw materials. The present application also relates to an expansion agent comprising the expanded clinker and a method for preparing the expanded clinker. Background technique [0002] At present, most of the expansion agents produced in my country are calcium sulfoaluminate hydrate (ettringite). From the perspective of hydration mechanism, in cement stone, various CaO, Al 2 o 3 , SO 3 The ettringite formed by the source may cause swelling. Most of the expansion agents in my country use fixed CaO, SO 3 source, transform Al 2 o 3 The technical route of the source, that is, CaO is provided by Portland cement hydration, SO 3 provided by anhydrite, by changing the Al 2 o 3 Sources, such as calcium aluminate (high alumina cement clinker), calcium sulfoaluminate (sulfoaluminum cement clinker), alunite, aluminous slag, calcined bauxite, coal gang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/06
CPCC04B7/48C04B22/008C04B40/0039Y02W30/91C04B14/10C04B18/12C04B22/0093C04B22/143C04B22/148C04B24/06C04B24/085C04B28/02C04B7/44
Inventor 吴翠娥刘勇凡涛涛刘虎阮海涛
Owner 武汉三源特种建材有限责任公司
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