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Phosphoaluminate early strength cement clinker being high in content of calcium aluminoferrite

A technology of aluminophosphate and early-strength cement, which is applied in the field of cement materials, can solve the problems of high cost and restrictions on the popularization and application of cement, and achieve the effect of low firing temperature

Inactive Publication Date: 2016-06-15
HUANGSHI YONGMING ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Aluminophosphate cement has excellent mechanical properties such as rapid hardening, early strength, and high strength. The cement paste has excellent durability, such as: excellent frost resistance, carbonation resistance, chemical corrosion resistance, impermeability and steel corrosion resistance, etc. This cement has a wide range of uses and market prospects in emergency repair projects, marine engineering, etc., and can replace and improve existing cementitious materials in some aspects. However, due to the high cost of raw materials, the cost of this cement is greatly high. Compared with ordinary Portland cement, it limits the popularization and application of this cement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] Example 1 Aluminophosphate early-strength cement clinker with high iron-aluminate calcium content, containing SiO 2 、Al 2 o 3 , Fe 2 o 3 , CaO, P 2 o 5 Components, mass content: SiO 2 10%, Al 2 o 3 50%, Fe 2 o 3 15%, CaO55%, P 2 o 5 30%, the rest are impurities, mixed according to the design ratio, after the raw materials are mixed, the above raw materials are calcined in a silicon-molybdenum rod electric furnace at 1500°C, and the normal heating rate (10°C / min) firing temperature is controlled at 1500°C-1570°C ℃, the holding time is 100min.

Embodiment 2

[0007] Example 2 The aluminophosphate early-strength cement clinker with high iron-aluminate calcium content is characterized in that it contains SiO 2 、Al 2 o 3 , Fe 2 o 3 , CaO, P 2 o 5 Components, mass content: SiO 2 1%, Al 2 o 3 10%%, Fe 2 o 3 5%, CaO35%%, P 2 o 5 30%, the rest are impurities, mixed according to the design ratio, after the raw materials are mixed, the above raw materials are calcined in a silicon-molybdenum rod electric furnace at 1800 °C, and the normal heating rate (12 °C / min) and the firing temperature are controlled at 1700-1750 °C Between, the holding time is 120min.

Embodiment 3

[0008] Example 3 The aluminophosphate early-strength cement clinker with high iron-aluminate calcium content is characterized in that it contains SiO 2 、Al 2 o 3 , Fe 2 o 3 , CaO, P 2 o 5 Components, mass content: SiO 2 8%, Al 2 o 3 30%, Fe 2 o 3 12%, CaO45%, P 2 o 5 20%, and the rest are impurities. The iron element mainly exists in the gaps of clinker minerals and acts as a flux. Mix it according to the design ratio. After the raw materials are mixed, use a 1750 ℃ ​​silicon-molybdenum rod electric furnace to calcinate the above raw materials , The normal heating rate (15°C / min), the firing temperature is controlled between 1700-1750°C, and the holding time is 100min.

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Abstract

A phosphoaluminate early strength cement clinker being high in content of calcium aluminoferrite includes, by mass, 1-10% of SiO2, 10-50% of Al2O3, 9-15% of Fe2O3, 35-55% of CaO, 10-30% of P2O5 and the balanced being impurities, wherein the raw materials are mixed and are calcined at 1500-1800 DEG C to sinter the phosphoaluminate early strength cement clinker being high in the content of calcium aluminoferrite. The cement clinker is low in sintering temperature and cost and is better in mechanical performance and anti-erosion performance.

Description

technical field [0001] The invention belongs to the technical field of cement materials, in particular to an aluminophosphate early-strength cement clinker with high content of calcium aluminate iron. Background technique [0002] Aluminophosphate cement has excellent mechanical properties such as rapid hardening, early strength, and high strength. The cement paste has excellent durability, such as: excellent frost resistance, carbonation resistance, chemical corrosion resistance, impermeability and steel corrosion resistance, etc. This cement has a wide range of uses and market prospects in emergency repair projects, marine engineering, etc., and can replace and improve existing cementitious materials in some aspects. However, due to the high cost of raw materials, the cost of this cement is greatly high. Compared with ordinary Portland cement, the popularization and application of this cement is limited. Contents of the invention [0003] The invention further reduces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B12/02
Inventor 柯丁丁
Owner HUANGSHI YONGMING ENVIRONMENTAL PROTECTION TECH CO LTD
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