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Fly ash-coal cinder cementing material and preparation method thereof

A technology of cementitious materials and fly ash, which is applied in the field of materials, can solve the problem of low utilization rate of slag and achieve the effect of strong coagulation

Active Publication Date: 2021-11-23
梁政
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the utilization rate of slag is generally low, and it is generally used in brick making and road paving

Method used

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  • Fly ash-coal cinder cementing material and preparation method thereof
  • Fly ash-coal cinder cementing material and preparation method thereof
  • Fly ash-coal cinder cementing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of fly ash-coal cinder cementitious material, it comprises the steps:

[0038] S1. Mix and stir fly ash, cinder, magnesium phosphate cement and retarder for 1-5 minutes, and stir evenly to form a mixture; retarder is borax. Wherein, based on the total weight of the mixture, the weight percentages of fly ash, coal cinder, cement and retarder are: magnesium phosphate cement dosage 19%, retarder dosage 1%, flyash dosage 60% and coal cinder Dosage 20%.

[0039] S2. Methyl methacrylate, sodium dodecylbenzenesulfonate and water are mixed to make an aqueous emulsion;

[0040] S3. Mix and stir the water emulsion of S2 and the mixture of S1 at a weight ratio of 0.18:1 to make a slurry of fly ash-cinder cementitious material. Wherein, based on the total weight of the aqueous emulsion, methyl methacrylate consumption 35wt%, sodium dodecylbenzenesulfonate 35wt% and water consumption 30wt.

Embodiment 2

[0042] With reference to embodiment 1, different from embodiment 1, on the basis of embodiment 1, also includes:

[0043] S4. The slurry of S3 is injected into the mould, then vibrated, left to form, demolded, then sealed and cured for 24-72h, and finally placed naturally to obtain solidified fly ash-cinder cementitious material.

Embodiment 3

[0044] The influence of embodiment 3 fly ash consumption on fluidity

[0045] With reference to Example 1, the influence of the amount of fly ash to the performance change of the fly ash-coal cinder cementitious material is tested by the univariate control method. The following table 3 shows that the amount of fly ash varies from 40% to 80% gradient, and other amounts are fixed.

[0046] The test method for the fluidity of the gelled material is as follows:

[0047] The test method of fluidity is carried out according to GB / T 2419-2005 "Measurement Method of Fluidity of Cement Mortar Sand" [, test equipment and parameters: the metal truncated cone circular mold with the cylinder size of 36mm×60mm×60mm is used, and the cone is placed in the center of the glass and wipe clean with a damp cloth. Take a certain amount of sample and conduct the test according to the standard method. In order to reduce the test error and improve the accuracy of the test, start timing when the coni...

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Abstract

The invention discloses a fly ash-coal cinder cementing material and a preparation method thereof, and the preparation method comprises the following steps: S1, uniformly mixing and stirring fly ash, coal cinder, cement and a retarder to form a mixture; S2, mixing methyl methacrylate, sodium dodecyl benzene sulfonate and water to prepare an aqueous emulsion; S3, mixing and stirring the aqueous emulsion in S2 and the mixture in S1 to prepare the slurry fly ash-coal cinder cementing material; and S4, injecting the slurry obtained in S3 into a mold, compacting, standing for forming, demolding, sealing for curing, and naturally placing to obtain the cured fly ash-coal cinder cementing material. The fly ash and the coal cinder are prepared into the high-performance cementing material, so that a large amount of solid waste fly ash and coal cinder are recycled, and the method is green and environment-friendly.

Description

technical field [0001] The invention relates to the field of materials, in particular to a fly ash-coal slag cementitious material and a preparation method thereof. Background technique [0002] Fly ash and coal slag are the main solid waste produced by coal combustion in thermal power plants. The fly ash is collected by the dust collector, while the cinder is discharged from the bottom. my country is a country that consumes a lot of coal resources. In 2020, coal consumption will increase by 0.6% year-on-year, accounting for 56.8% of the total energy consumption. At present, the utilization rate of cinder is relatively low, mainly used in cement, concrete, etc., and rarely used in brick making and roadbed cushion. If coal slag can be fully utilized, its accumulation and disposal can be slowed down, land occupation and sulfur-containing gas pollution to the atmospheric environment can be reduced, and it may even spontaneously ignite. However, cinder is far inferior to fly ...

Claims

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Application Information

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IPC IPC(8): C04B28/34
CPCC04B28/344C04B18/08C04B18/10C04B22/0013C04B24/045C04B24/20Y02W30/91
Inventor 梁政
Owner 梁政
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