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An early-strength sulfate-resistant cement

A sulfate-resistant cement, early-strength technology, applied in the field of cement concrete filling, can solve the problems of compressive strength and corrosion resistance that need to be improved, difficult to achieve, complicated raw materials and processes, etc., so as to shorten the curing time and reduce energy consumption. , the effect of increasing the service life

Active Publication Date: 2021-12-24
阳新娲石水泥有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cement clinker prepared by using the above-mentioned mineralizers and activators uses too complicated raw materials and processes, and can only be used in scientific research, and it is difficult to realize in actual production and application, and its compressive strength and anti-erosion performance need to be improved.

Method used

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  • An early-strength sulfate-resistant cement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] For the early-strength sulfate-resistant cement provided in this example, the raw materials of the cement clinker used include 78wt% of calcareous materials, 6.8wt% of silica-alumina materials, 10.6wt% of ferrous materials, 4wt% of phosphorus slag, and 0.6 wt% of catalysts. wt%; the loss on ignition of the cement clinker is less than 0.3%, the free calcium oxide is less than 1.0%, and the mineral composition of the cement clinker is C 3 S 51.3%, C 2 S23.8%, C 4 AF 19.5%, C 3 A 2.1 percent.

[0025]The preparation method of cement clinker is: grind and dry calcareous materials, silicon-aluminum materials, and iron materials into powders with an average particle size of 27 μm and sieve 12% of them at 80 μm, then calcinate at 1380 ° C for 1 hour, and finally press Rapid cooling at 60°C / min to room temperature.

[0026] The raw materials of the early-strength sulfate-resistant cement in this embodiment are 88% cement clinker, 0.04% grinding aid, 8% slag fine powder, and...

Embodiment 2

[0028] The raw material composition of the early-strength sulfate-resistant cement provided in this example, and the preparation method of the cement clinker are the same as those in Example 1, except that the raw materials of the cement clinker used include 74wt% of calcareous materials, silica-alumina 12wt% of cement clinker, 11.2wt% of iron material, 3wt% of phosphorus slag, 0.8wt% of catalyst, and the mineral composition of cement clinker is C 3 S48.5%, C 2 S 25.3%, C 4 AF 22.6%, C 3 A 1.7%.

Embodiment 3

[0030] The raw material composition of the early-strength sulfate-resistant cement provided in this example, and the preparation method of the cement clinker are the same as those in Example 1, except that the raw materials of the cement clinker used include 80 wt% of calcareous materials, silica-alumina 3.6wt% of cement clinker, 13wt% of iron material, 3wt% of phosphorus slag, 0.4wt% of catalyst, and the mineral composition of cement clinker is C 3 S53.9%, C 2 S 22.3%, C 4 AF 20.1%, C 3 A 1.9%.

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Abstract

The invention discloses an early-strength sulfate-resistant cement. The raw materials of the cement clinker include 74-82wt% of calcareous materials, 4-12wt% of silicon-aluminum materials, 10-15wt% of iron materials, phosphorus slag 3-5wt%, catalyst 0.4-0.8wt%; the catalyst is an organic acid salt. By increasing the content of iron phase, reducing the content of tricalcium silicate and tricalcium aluminate, and adding phosphorus slag and catalyst, the firing temperature of cement clinker is reduced, and the early strength performance and sulfate erosion resistance of the final prepared cement are further improved. performance.

Description

technical field [0001] The invention belongs to the field of cement concrete filling, in particular to an early-strength sulfate-resistant cement. Background technique [0002] Cement is a basic raw material for the construction industry. With the gradual acceleration of the construction of western my country, the demand for cement is increasing year by year for infrastructure projects in high-saline-alkaline areas and complex marine environments. However, ordinary Portland cement and concrete suffer from corrosion cracking and durability degradation in complex environments such as sulfate attack. According to a survey by the Ministry of Housing and Urban-Rural Development, the service life of marine buildings is only about 15-20 years, and the ordinary concrete in the salt lake area is corroded within 1-2 years, which is far from meeting the requirement of 50 years or even longer durability. The usability and safety of infrastructure also seriously hinders the development...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/24C04B7/19C04B7/21C04B7/36C04B7/44C04B7/42
CPCC04B7/24C04B7/19C04B7/21C04B7/36C04B7/44C04B7/428C04B7/425Y02P40/10
Inventor 胡龙明罗吉祥程瑞忠柯于凯
Owner 阳新娲石水泥有限公司
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