Sound-absorbing ceramsite as well as preparation method and application thereof

A technology of ceramsite and red mud, applied in the field of sound-absorbing ceramsite and its preparation, can solve the problems of inability to guarantee the durability of concrete buildings, low cylinder compressive strength, poor uniformity, etc., and achieve high added value utilization and excellent sound absorption performance. , the effect of reducing the stockpile

Active Publication Date: 2020-07-31
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the performance of the existing ceramsite has the following main problems: First, it cannot achieve light weight and high strength. Most of the existing ceramsite can meet the requirements of the code for light aggregate and low density, but the cylinder compressive strength is low, only 2MPa left and right, not only cannot guarantee the durability of concrete buildings, but also cannot resist the impact of high-intensity airflow on the track; second, the existing ceramsites are ordinary lightweight ceramsites, which generally do not have a large number of small connected voids, and the apparent porosity is biased. low, the hole size is not equal, and the uniformity is poor. The noise reduction performance of ceramsite is very limited and cannot meet the relevant requirements of building sound-absorbing products; third, the sphericity and roundness of existing ceramsite are not enough, and most of them are ellipsoidal or angular. , which has a great influence on the noise reduction effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032] The preparation method of the sound-absorbing ceramsite comprises the following steps:

[0033] Mix red mud, coal gangue, waste gypsum powder, construction waste, waste stone powder, waste wood chips and ammonium bicarbonate to obtain a mixed material;

[0034] The mixed material is successively pelletized, dried and sintered to obtain sound-absorbing ceramsite;

[0035] The sintering includes: first heating from room temperature to 300-500°C, constant temperature for 10-60 minutes; second heating to 700-900°C, constant temperature for 10-60 minutes; third heating to 900-1300°C, constant temperature for 10-150 minutes .

[0036] In the present invention, unless otherwise specified, the required preparation raw materials are obtained by those skilled in the art by conventional means.

[0037] In terms of mass percentage, the raw materials for the preparation of the sound-absorbing ceramsite provided by the present invention include 15-45% red mud, preferably 20-40%, mo...

Embodiment 1

[0065] Red mud, coal gangue, waste gypsum powder, waste stone powder, waste wood chips and ammonium bicarbonate were dried at 105°C respectively, and then ground until the sieve residue of 80 μm square hole was less than 10%, to obtain fine powder; among them, waste Gypsum powder is phosphogypsum, waste stone powder is limestone;

[0066] The fine powder is respectively 300g (23.43%), 700g (54.68%), 100g (7.81%), 100g ( 7.81%), 50g (3.9%) and 30g (2.3%) carry out batching, stir with the rotating speed of 300rpm, obtain mixed material;

[0067] Put the mixed material into a disc ball forming machine, use an atomizer to spray water mist, roll the mixed material into balls, the water content of the mixed material is 10%, and the particle size of the balls is 5-15 mm;

[0068] Dry the raw meal balls obtained after forming into balls at a drying temperature of 105°C until the moisture content is less than 1.0%;

[0069] Raise the dried pellets from room temperature to 300°C at a ...

Embodiment 2

[0072] Red mud, coal gangue, waste gypsum powder, waste stone powder, waste wood chips and ammonium bicarbonate were dried at 105°C respectively, and then ground until the sieve residue of 80 μm square hole was less than 10%, to obtain fine powder; among them, waste The gypsum powder is composed of phosphogypsum and desulfurized gypsum, the mass ratio of phosphogypsum and desulfurized gypsum is 1:1, and the waste stone powder is limestone;

[0073] The fine powder is respectively 300g (24%), 600g (48%), 100g (8%), 50g (4%) according to red mud, coal gangue, waste gypsum powder, waste stone powder, waste wood chips and ammonium bicarbonate quality. %), 100g (8%) and 100g (8%) carry out batching, stir with the rotating speed of 300rpm, obtain mixed material;

[0074] Put the mixed material into a disc ball forming machine, use an atomizer to spray water mist, roll the mixed material into balls, the water content of the mixed material is 10%, and the particle size of the balls is...

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Abstract

The invention provides sound-absorbing ceramsite as well as a preparation method and application thereof, and belongs to the technical field of buildings. The sound-absorbing ceramsite disclosed by the invention has the characteristics of light weight, high strength, small and uniform pore size, low cost and the like; the bulk density is 600-1100 kg/m < 3 >, the roundness and sphericity are both greater than or equal to 0.8, the cylinder compressive strength is 5-10 MPa, the porosity is greater than 40%, the average pore size is 0.1-500 [mu] m, the apparent porosity is 5-65%, and the 1h waterabsorption rate is 5-35%. In the sound-absorbing ceramsite, more than 90% of the raw materials are industrial solid waste or building solid waste, the preparation cost is low, the sound-absorbing ceramsite is excellent in sound-absorbing performance, a high-performance ceramsite sound-absorbing plate or light-weight aggregate high-performance concrete can be manufactured, and an effective way is provided for resource utilization of the industrial solid waste and the building solid waste.

Description

technical field [0001] The invention relates to the technical field of construction, in particular to a sound-absorbing ceramsite and its preparation method and application. Background technique [0002] Ceramsite is a kind of artificial lightweight aggregate, which has the characteristics of light weight, high strength, corrosion resistance, good shock resistance, high porosity and good thermal insulation performance, so it is widely used in building materials, chemical filtration, oil exploration and other fields. At present, ceramsite used for building materials accounts for more than 70% of the total output of ceramsite. The raw materials for traditional production of ceramsite are in short supply and expensive, resulting in low added value of the ceramsite industry and shrinking industrial scale. It is urgent to find new raw materials and high additional materials. Value preparation process, improve the added value of ceramsite industry. [0003] With the continuous re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/02C04B18/04C04B18/12C04B18/16
CPCC04B18/027C04B18/023C04B18/0409C04B18/12C04B18/0445C04B18/26C04B22/106C04B18/064C04B18/16Y02W30/91
Inventor 朱万旭赵艳荣李万杰李国源刘丽
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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