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Preparation technology for slag foamed concrete block

A foamed concrete and preparation process technology, applied in the field of concrete, can solve the problems of strength cracks, water resistance, large drying shrinkage, etc., and achieve the effects of excellent early strength performance, fast strength, and fast strength.

Inactive Publication Date: 2011-10-19
杜世永
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the amount of cement in the foam concrete is 61% to 85%. In order to solve the technical problem of the collapse of the foam concrete after pouring, early-strength high-grade cement is often used, which leads to an increase in production costs
At the same time, the production process of foam concrete bricks is backward, and there is no large-scale industrial production process so far. The quality of the produced products is unstable and the compressive strength cannot meet the needs of modern building development.
In addition, the foamed concrete products themselves have a large drying shrinkage, are prone to strength cracks, are not resistant to water, and are afraid of freezing and thawing, which affects the promotion and large-scale application of foamed concrete products.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Weigh 40Kg of calcium carbide slag, 25 Kg of fly ash, 5 Kg of waste gypsum, and 12 Kg of coal gangue in proportion. Put the above materials into a mixer and add water to stir to make a mixture. The moisture content of the mixture is 12%, and it is made by a brick machine The adobe is sent to the wheel kiln or tunnel kiln for firing clay bricks after drying, and the waste slag adobe is calcined at low temperature by using the technology of firing clay bricks. The calcination temperature is controlled at 720-860°C. When the degree reaches 320 mesh, it can be made into waste slag early strength agent.

[0028] 2. Weigh 55 Kg of waste bricks and tiles, 15 Kg of calcium carbide slag, 3 Kg of desulfurized gypsum, and 50 Kg of blast furnace slag in the construction waste in proportion, and send the above materials into a ball mill until the fineness reaches 180 mesh, which is to make waste slag cement material.

[0029] 3. Weigh 4 Kg of sodium carbonate, 1 Kg of silicone w...

Embodiment 2

[0036]1. Weigh 55Kg of calcium carbide slag, 40 Kg of fly ash, 3 Kg of waste gypsum, and 20 Kg of coal gangue in proportion. Put the above materials into a mixer and add water to stir to make a mixture. The moisture content of the mixture is 24%, and it is made by a brick machine The adobe is sent to the wheel kiln or tunnel kiln for firing clay bricks after drying, and the waste slag adobe is calcined at low temperature by using the technology of firing clay bricks. The calcination temperature is controlled at 720-860°C. When the degree reaches 300 mesh, it can be made into waste slag early strength agent.

[0037] 2. Weigh 35 Kg of coal gangue, 30 Kg of quicklime, 6 Kg of gypsum powder, and 20 Kg of blast furnace slag in proportion, and send the above materials into a ball mill for ball milling until the fineness reaches 180 mesh, and then the waste slag cement is made.

[0038] 3. Weigh 4 Kg of sodium carbonate, 1 Kg of silicone waterproofing agent, 0.2 Kg of Ninar, 0.8 Kg ...

Embodiment 3

[0045] 1. Weigh 45Kg of calcium carbide slag, 40 Kg of fly ash, 4 Kg of waste gypsum, and 12 Kg of coal gangue in proportion. Put the above materials into a mixer and add water to stir to make a mixture. The moisture content of the mixture is 20%, and it is made by a brick machine The adobe is sent to the wheel kiln or tunnel kiln for firing clay bricks after drying, and the waste slag adobe is calcined at low temperature by using the technology of firing clay bricks. The calcination temperature is controlled at 720-860°C. When the degree reaches 400 mesh, it is made into waste residue early strength agent.

[0046] 2. Weigh 45 Kg of fly ash, 23 Kg of calcium carbide slag, 5 Kg of desulfurized gypsum, and 40 Kg of blast furnace slag, and send the above materials into a ball mill for ball milling until the fineness reaches 180 mesh, and then the waste slag cement is made.

[0047] 3. Weigh 4 Kg of sodium carbonate, 1 Kg of silicone waterproofing agent, 0.2 Kg of Ninar, 0.8 Kg o...

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Abstract

The invention discloses a preparation technology for a slag foamed concrete block. The preparation technology comprises: (1) preparing a slag early strength agent; (2) preparing a slag cementing material; (3) preparing a compound admixture; (4) preparing foam of a foaming agent; (5) preparing a mixed slurry; (6) mixing the mixed slurry and the foam of the foaming agent according to a volume ratio of 1:6, followed by carrying out stirring to prepare a foamed slurry having a volume weight of 20-130 mm; (7) conveying the foamed slurry in a standing room, and supplying saturated vapor to the standing room, wherein a heating rate on the standing room is 5-8 DEG C per hour, followed by standing for 3-6 hours at a temperature of 55-60 DEG C, then conveying the stood foamed slurry in a autoclave, wherein steam pressure in the autoclave is increased to 0.8-1.2 Mpa in 2-3 hours, then remaining a constant temperature for 4-6 hours, followed by decreasing the steam pressure to zero in 2-2.5 hours to prepare the finished product. Each technical index of the solid slag autoclaved foamed concrete block provided by the present invention is superior to or accords with standard requirements of JC / T1062-2007 foamed concrete block.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a waste slag foam concrete brick. Background technique [0002] In the prior art, the amount of cement in the foam concrete is 61% to 85%. In order to solve the technical problem of foam concrete collapse after pouring, early-strength high-grade cement is often used, which leads to increased production costs. At the same time, the production technology of foam concrete bricks is backward, and there is no large-scale industrial production technology so far. The quality of the products is unstable and the compressive strength cannot meet the needs of modern building development. In addition, the foamed concrete product itself has a large drying shrinkage, is prone to strength cracks, is not resistant to water, and is afraid of freezing and thawing, which affects the promotion and large-scale application of the foamed concrete product. Contents of the invention [0003] The purp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B28/08
Inventor 杜世永
Owner 杜世永
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