Aerated concrete block and preparation process thereof

A technology of aerated concrete and preparation process, which is applied in the field of concrete blocks to achieve the effects of saving energy, solving damage to the environment, and improving composite reactions

Pending Publication Date: 2020-01-31
HUNAN INSTITUTE OF ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above experiments are all using fly ash and some metal tailings to prepare aerated concrete under the autoclave-free process. The chemical composition and particle size of the steel slag powder are similar to it, which shows that the use of steel slag to prepare aerated concrete has certain feasibility. , but under autoclaved conditions, there is almost no

Method used

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  • Aerated concrete block and preparation process thereof
  • Aerated concrete block and preparation process thereof
  • Aerated concrete block and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] a. The cementitious material and additives are selected according to the weight ratio, including steel slag 35%, slag 28%, cement 8%, fly ash 15%, alkali content 6%, water glass modulus 1.6, aluminum powder paste 0.1%, quicklime 6%, desulfurized gypsum 5%, sodium sulfate 2.8%, foam stabilizer 0.08%; the ratio of water to material in raw materials is 0.48.

[0096] b. Mix the gelling materials and stir them at a speed of 140 ± 5 r / min for rotation and 62 ± 5 r / min for revolution, and perform dry mixing for 2 minutes to make a mixture;

[0097] c. Take water accounting for 5% of the total water weight, add aluminum powder paste and foam stabilizer to 55°C water to make a suspension;

[0098] d. Dissolve water glass and sodium hydroxide into the remaining 95% of 55°C water, stir evenly, stir until no sodium hydroxide solid remains, and adjust to 48°C;

[0099] e. Pour the alkali solution added with water glass obtained in step d into the mixture obtained in step b, the st...

Embodiment 2

[0106] Such as Figure 15 shown.

[0107] a. The cementitious materials and additives are selected according to the weight ratio, including steel slag 35%, slag 28%, cement 13%, fly ash 9%, alkali content 6%, water glass modulus 1.6, aluminum powder paste 0.1%, quicklime 6%, desulfurized gypsum 5%, sodium sulfate 3%, foam stabilizer 0.08%, triethanolamine 0.08%, water reducer 0.5%; the ratio of water to material in raw materials is 0.48.

[0108] b. Mix the gelling material and the water reducer, and stir at a speed of 140±5r / min for rotation and 62±5r / min for revolution, and dry mix for 2min to make a mixture;

[0109] c. Take water accounting for 5% of the total water weight, add aluminum powder paste, foam stabilizer, and triethanolamine to 55°C water in sequence to make a suspension;

[0110] d. Dissolve water glass and sodium hydroxide into the remaining 95% of 55°C water, stir evenly, stir until no sodium hydroxide solid remains, and adjust to 48°C;

[0111] e. Pour t...

Embodiment 3

[0118] a. The cementitious materials and additives are selected according to the weight ratio of raw materials, including 35% steel slag, 28% slag, 10% cement, 12% fly ash, 6% alkali content, 1.6 water glass modulus, 0.1% aluminum powder paste, quicklime 6%, desulfurized gypsum 5%, sodium sulfate 3%, foam stabilizer 0.08%, triethanolamine 0.08%, water reducer 0.5%; the ratio of water to material in raw materials is 0.48.

[0119] b. Mix the gelling material and the water reducer, and stir at a speed of 140±5r / min for rotation and 62±5r / min for revolution, and dry mix for 2min to make a mixture;

[0120] c. Take water accounting for 5% of the total water weight, add aluminum powder paste, foam stabilizer, and triethanolamine to 55°C water in sequence to make a suspension;

[0121] d. Dissolve water glass and sodium hydroxide into the remaining 95% of 55°C water, stir evenly, stir until no sodium hydroxide solid remains, and adjust to 48°C;

[0122] e. Pour the alkali solution ...

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Abstract

The invention discloses an aerated concrete block which is prepared from a cementing material, an additive and water by adopting an autoclaving-free process. The cementing material mainly comprises the following raw materials: steel slag, mineral slag and cement. The invention also discloses a preparation process of the aerated concrete block. The preparation process comprises the following steps:a, selecting steel slag, quick lime, gypsum, fly ash, cement, slag, aluminum powder paste, sodium sulfate, a foam stabilizer, water glass and sodium hydroxide as raw materials; b, carrying out dry mixing on the cementing material to prepare a mixture; c, adding water into the aluminum powder paste, the foam stabilizer and a curing agent to prepare a suspension; d, dissolving water glass and sodium hydroxide into water, and carrying out uniform mixing under stirring; e, pouring a solution obtained in the step d into the mixture obtained in the step b to obtain slurry; f, adding the obtained suspension into the slurry, and carrying out stirring to form paste; g, pouring the paste into a mold, carrying out casting molding, performing demolding after pre-curing, and carrying out hot and wet maintenance on a demolded green body to obtain the finished block. The block prepared by the autoclaving-free preparation process has the advantage of high compressive strength.

Description

technical field [0001] The invention relates to the technical field of concrete blocks, in particular to an aerated concrete block and a preparation process thereof. Background technique [0002] In 2016, my country's crude steel output was about 808 million tons, of which steel slag output was about 65-120 million tons, and 125-140 kg of steel slag would be produced for every ton of steel smelted. A large amount of discarded steel slag piles up into mountains, which seriously threatens the safety of the ecological environment and has increasingly become a bottleneck for the survival and development of the steel industry. It not only occupies land, pollutes the surrounding air and rivers, but also wastes a lot of resources. There are many types of steel slag, with different components and properties. The comprehensive utilization rate of steel slag after treatment is about 25%. Steel slag can not only turn waste into treasure, but also protect the environment. Therefore, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B28/04
CPCC04B28/04C04B2111/40C04B2201/20C04B2201/50C04B18/141C04B18/142C04B18/08C04B12/04C04B22/062C04B22/04C04B22/064C04B22/145C04B22/147C04B2103/48C04B38/02C04B38/0074C04B38/0067C04B2103/302C04B24/122
Inventor 李小华刘星曾智
Owner HUNAN INSTITUTE OF ENGINEERING
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