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A kind of fast-setting corrosion-resistant cement using fly ash as raw material and preparation method thereof

A fly ash and raw material technology, which is applied in the field of fast-setting corrosion-resistant cement and its preparation, can solve the problems of poor cement performance and achieve the effects of less emissions, reduced steam curing heat consumption, and low calcination temperature

Active Publication Date: 2016-07-27
吴忠赛马新型建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing technology of using fly ash to prepare cement has a small amount of fly ash and high requirements on the quality of fly ash. For example, the maximum amount of fly ash used in the production of fly ash Portland cement is only 40%, and the use of fly ash is high. The loss on ignition and activity of ash have relatively strict requirements, and the performance of cement is poor when the amount of fly ash is large

Method used

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  • A kind of fast-setting corrosion-resistant cement using fly ash as raw material and preparation method thereof
  • A kind of fast-setting corrosion-resistant cement using fly ash as raw material and preparation method thereof
  • A kind of fast-setting corrosion-resistant cement using fly ash as raw material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The batch contains the following ingredients in parts by mass:

[0032]

[0033] Take fly ash, slaked lime, sodium hydroxide, and Glauber's salt according to the above mass ratio and grind together until the fineness is 80 μm and the sieve residue is 4.2%. After adding 20 parts of water, stir for 3 minutes, and prepare a ball with a diameter of 8-12mm material balls, the material balls are steamed in a steaming box at 90°C for 16 hours to obtain steamed nutrients, and the steamed nutrients are calcined at 750°C for 90 minutes and then blown to obtain synthetic materials. 75 parts of synthetic materials, Portland cement 20 parts of clinker, 8 parts of dihydrate gypsum, 0.3 part of sodium citrate, and 0.3 part of sodium methylene dimethyl dinaphthalene sulfonate polymer are jointly ground to a sieve residue of 80 μm to 3.1%, and a fast-setting resistant Erosion cement.

Embodiment 2

[0035] The batch contains the following ingredients in parts by mass:

[0036]

[0037] Weigh fly ash, slaked lime, potassium hydroxide, and dihydrate gypsum according to the above mass ratio and grind together until the fineness is 80 μm and the sieve residue is 3.8%, add 22 parts of water, stir for 3 minutes, and form a ball into a diameter The material ball is 8-12mm. The material ball is steamed in a steaming box at 95°C for 12 hours to obtain a steamed feed. The steamed feed is calcined at 800°C for 60 minutes and then blown to obtain a synthetic material. 80 parts of the synthetic material, silicate 15 parts of cement clinker, 5 parts of anhydrous gypsum, 1.0 part of sodium polyphosphate and 0.3 part of sodium lignosulfonate were ground together until the sieve residue of 80 μm was 2.8%, and a fast-setting corrosion-resistant cement was prepared.

Embodiment 3

[0039] The batch contains the following ingredients in parts by mass:

[0040]

[0041] Weigh fly ash, slaked lime, sodium carbonate, and Glauber's salt according to the above mass ratio and grind together until the fineness is 80 μm and the sieve residue is 3.3%. After adding 23 parts of water, stir for 3 minutes, and form a ball disc with a diameter of 8 ~ 12mm material balls, the material balls are steamed in a steaming box at 95°C for 12 hours to obtain steamed nutrients, and the steamed nutrients are calcined at 850°C for 30 minutes and then blown to obtain synthetic materials, 80 parts of synthetic materials, Portland cement clinker 15 parts are ground together with 7 parts of dihydrate gypsum, 0.5 parts of sodium gluconate, and 0.5 parts of sodium methylene dimethyl dinaphthalene sulfonate polymer until the 80 μm sieve is 2.5%, and a fast-setting corrosion-resistant cement is prepared .

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Abstract

The invention discloses a fast-setting anti-corrosion cement using coal ash as a raw material and a preparation method thereof. The fast-setting anti-corrosion cement is prepared from the following components in parts by mass: 60-75 parts of coal ash, 25-40 parts of slaked lime, 0.5-1.5 parts of alkaline excitant, and 1-2 parts of sulfate excitant; the preparation method comprises the following steps: ball-milling the raw materials to obtain a batch mixture with 80-micron screen residue content less than 5%, adding 20-25 parts of water, uniformly stirring to prepare a raw material ball, hydro-thermally treating the raw material ball at 95-98 DEG.C for 10-16 hours to obtain a steamed material, calcining the steamed material at 750-900 DEG.C for 15-90 minutes, and cooling to obtain a synthetic material; and commonly ball-milling 75-85 parts of the synthetic material and 10-20 parts of Portland cement together with 5-8 parts of gypsum, 0.2-1.0 part of thickening time control agent and 0.3-0.7 part of water reducing agent until the 80-micron screen residue content is less than 4%. The cement is low in calcining temperature and thermal loss, high in coal ash utilization rate, fast-setting and fast-hardening, high in strength, and goon in sulfate attack resistance.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a fast-setting corrosion-resistant cement using fly ash as a raw material and a preparation method thereof. Background technique [0002] Cement is the most widely used man-made material in civil engineering, water conservancy and transportation construction projects. Its production process requires a large amount of limestone, clay, fuel and electricity. It is a material with high resource and energy consumption and high greenhouse gas emissions. New raw materials are sought Resources and alternative or supplementary new cement preparation methods are issues that materials workers have been working on. With the continuous expansion of construction and development areas and fields, construction projects in special natural environments also put forward different new requirements for the performance of cement, and the demand for cement with special properties...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B22/14C04B18/08
CPCY02W30/91
Inventor 方永浩龚泳帆王亚楠朱晨辉顾亚敏韦华游多缪新河顾冲时苏怀智
Owner 吴忠赛马新型建材有限公司
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