Method for producing aerated concrete from superfine coal ash

A technology of aerated concrete and fly ash, applied in the field of composite materials, can solve the problems of low comprehensive utilization rate, low product grade, dust pollution, etc., and achieve the effect of reducing production cost and production cost

Inactive Publication Date: 2019-01-22
遵义景程环保材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example: a) ultra-fine fly ash and its products fluctuate greatly in performance, lack durability, and low degree of resource utilization; b) the product grade is slightly low, and the profit margin of the enterprise is low, which affects the enthusiasm of the enterprise; c) the utilization method is relatively single, The main channel is still road construction, building material products, concrete and cement, etc., and is greatly affected by the seasons, and the comprehensive utilization rate is low, with significant regional differences; d) In the process of comprehensive utilization, there are still some negative effects on the environment Impacts, such as dust pollution from ash storage yards and transport vehicles, treatment of waste residues after extracting useful substances, accumulation of heavy metals in the agricultural process, and radioactive problems in building materials, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Method for producing air-entrained concrete with ultra-fine fly ash: the air-entrained concrete composition contains 57%

[0037] Superfine fly ash, 20% quicklime, 10% P.0.42.5 ordinary Portland cement, 3% gypsum, 10% superfine fly ash.

[0038] The total water-to-material ratio is 0.5-0.8, and the mixing water is warm water at 70°C. Add superfine fly ash and water to make a slurry, stir for 3-4 minutes, add cement, stir for 3-4 minutes, add gypsum, stir for 2-3 minutes, add quicklime, stir for 2-3 minutes, pump until pouring car slurry In the material mixing tank, turn on the pouring car owner's mixer for secondary mixing. Add the measured ultra-fine fly ash, stir for 30-50s, inject into the mold to generate gas, stop at 60°C for 2 hours, and cut into pieces. Send it into an autoclave, autoclave at 165°C and a pressure of 0.8-1.2MPa, and leave the autoclave at a constant temperature for 8-10 hours.

[0039] The product leaves the factory after 4-7 days of natural cu...

Embodiment 2

[0041] Method for producing air-entrained concrete with ultra-fine fly ash: the air-entrained concrete composition contains 57% granulated ultra-fine fly ash, 20% quicklime, 10% P.0.42.5 ordinary Portland cement, 3% gypsum , 10% superfine fly ash.

[0042] The total water-to-material ratio is 0.5-0.8, and the mixing water is warm water at 70°C. Add water to the granulated ultra-fine fly ash to make a slurry, stir for 3-4 minutes, add cement, stir for 3-4 minutes, add gypsum, stir for 2-3 minutes, add quicklime, stir for 2-3 minutes, pump until pouring In the vehicle slurry mixing tank, turn on the pouring vehicle owner's mixer for secondary mixing. Add the measured ultra-fine fly ash, stir for 30-50s, inject into the mold to generate gas, stop at 60°C for 2 hours, and cut into pieces. Send it into the autoclave, autoclave at 180-190°C and 1.0-1.2MPa pressure, and leave the autoclave at constant temperature for 6-8 hours.

[0043] The product leaves the factory after 4-7 day...

Embodiment 3

[0045] A method for producing air-entrained concrete with ultra-fine fly ash: the air-entrained concrete composition contains 38-42% ultra-fine fly ash, 30-32% slag, 18-20% P.0.42.5 ordinary portland cement , 10% ultra-fine fly ash, and the right amount of gas regulator.

[0046] The total water-to-material ratio is 0.30-0.50, and the mixing water is warm water at 70°C. Mix the slag, ultra-fine fly ash and dry cement powder evenly, beat and mix evenly, stir for 3-4 minutes, pump it into the slurry mixing tank of the pouring car, turn on the main mixer of the pouring car, and perform the second mixing. Add the measured ultra-fine fly ash, stir for 15-30s, inject into the mold to generate gas, stop at 60°C for 2 hours, and cut into pieces. Send it into the autoclave, autoclave at 210°C and 1.5MPa pressure, and leave the autoclave at constant temperature for 6-8 hours.

[0047] The product leaves the factory after 4-7 days of natural curing.

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Abstract

The invention relates to a method for producing aerated concrete from superfine coal ash. The invention discloses a method for producing the aerated concrete from the superfine coal ash, and a preparation technology thereof. In percentage by weight, 50-70% of superfine coal ash, 10-20% of silicate cement, 5-20% of quick lime, and 5-10% of dihydrate gypsum are added. Compared with the prior art, the method has the following advantages: (1) a large amount of superfine coal ash can be used for producing the aerated concrete, so that a resource utilization technology is realized, and expensive processing cost can be greatly lowered; (2) the metal aluminum ingredients are fully utilized.

Description

technical field [0001] The invention relates to a composite material, in particular to a method for producing air-entrained concrete with superfine fly ash and its preparation technology. Background technique [0002] With the rapid development of my country's economy, power plants and urban heating projects continue to increase, and the output of ultra-fine fly ash also increases. In 2006, my country's thermal power plants alone produced about 240 to 290 million tons of ultra-fine fly ash and 0.2 to 30 million tons of slag, ranking first in the world. At present, the utilization rate of superfine fly ash in western developed countries has reached more than 80%, while in our country it is only about 30% to 40%. Most of the unutilized ultra-fine fly ash is discharged into ash storage plants, landfills or rivers, lakes and seas. The accumulation of ultra-fine fly ash not only occupies a large amount of land, but also causes serious pollution to the surrounding environment an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/40C04B18/08C04B22/064C04B22/143C04B22/04C04B38/02
Inventor 杨媛
Owner 遵义景程环保材料有限公司
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