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Solid waste-based unfired high-strength ceramsite and preparation method thereof

A technology of high-strength ceramsite and ceramsite, which is applied in the field of solid waste-based unburned high-strength ceramsite and its preparation, can solve the problems of high energy consumption and high cost, and achieves reduced energy consumption, excellent durability, and guaranteed overall structural strength. Effect

Active Publication Date: 2021-08-03
CHINA MCC17 GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of high energy consumption and high cost in the preparation of the existing traditional ceramsite, and provide a solid waste-based non-fired high-strength ceramsite and its preparation method

Method used

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  • Solid waste-based unfired high-strength ceramsite and preparation method thereof

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preparation example Construction

[0039] The specific steps of the preparation method of the above-mentioned unfired ceramsite are as follows:

[0040](1) Phosphogypsum pretreatment;

[0041] The phosphogypsum used in the present invention is the solid waste generated during the wet production of phosphoric acid. The phosphogypsum is baked in an oven at 100-120°C for 24-28 hours, then ground in a ball mill, and passed through a 70-mesh sieve for use. The use of phosphogypsum in the ceramsite component can effectively improve the utilization rate of phosphogypsum, and solve the problems of direct stacking of a large amount of phosphogypsum, land occupation and environmental pollution.

[0042] (2) Preparation of core material and shell material;

[0043] The preparation method of the core material is as follows: dry-mix and stir various core material raw materials evenly, add 18%-35% water, seal after stirring, and place at room temperature to age for 0.5h-1h.

[0044] The preparation method of the shell mate...

Embodiment 1

[0057] A kind of preparation method of solid waste-based unfired high-strength ceramsite in this embodiment, the method is as follows:

[0058] (1) Phosphogypsum pretreatment: bake the phosphogypsum in an oven at 120°C for 24 hours, then grind it in a ball mill, and pass it through a 70-mesh sieve for later use.

[0059] (2) Raw material preparation: The raw material ratio of the core material is as follows: the weighing mass fraction is 43% phosphogypsum, 20% sludge incineration ash, 16% slag micropowder, 12% Grade III fly ash, 8% Cement, 0.5% insulation board particles, 0.5% ammonium bicarbonate. The ratio of shell raw materials is as follows: the weighing mass fraction is 35% of phosphogypsum; 28% of slag powder; 20% of cement; 14% of grade I fly ash; Add 30% tap water. Stir for 5 minutes, seal with a plastic film, and place it at room temperature to age for 0.5 hours to make the water evenly distributed. Finally, dry-mix and stir the shell raw materials evenly, add 28% ...

Embodiment 2

[0066] A kind of preparation method of solid waste-based unfired high-strength ceramsite in this embodiment, the method is as follows:

[0067] (1) Phosphogypsum pretreatment: bake the phosphogypsum in an oven at 100°C for 28 hours, then grind it in a ball mill, and pass it through a 70-mesh sieve for later use.

[0068] (2) Raw material preparation: The raw material ratio of the core material is as follows: the weighing mass fraction is 32% phosphogypsum, 22% sludge incineration ash, 19% slag micropowder, 13% grade III fly ash, 12% Cement, 1% insulation board particles, 1% ammonium bicarbonate. The ratio of shell raw materials is as follows: the weighing mass fraction is 28% of phosphogypsum; 32% of slag powder; 20% of cement; 15% of grade I fly ash; Add 32% tap water. Stir for 5 minutes, seal with a plastic film, and place it at room temperature to age for 0.5 hours to make the water evenly distributed. Finally, dry mix and stir the shell raw materials evenly, add 25% wat...

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Abstract

The invention discloses solid waste-based unfired high-strength ceramsite and a preparation method thereof, and belongs to the technical field of building materials. The core material of the unfired ceramsite comprises the following components in parts by weight: 32-46% of ardealite; 18%-24% of sludge incineration ash; 16%-20% of superfine slag powder; 10%-15% of III-grade fly ash; 8%-14% of cement and 0.5%-3% of insulation board particles; 0.2%-1% of ammonium bicarbonate; the shell comprises the following components: 28%-38% of ardealite; 24%-35% of superfine slag powder; 12%-20% of cement; 12%-18% of I-grade fly ash; and 1%-6% of silica fume. The secondary curing process is adopted, the core material is prepared firstly, the shell material is used for wrapping the core material after primary curing, and surface modification is carried out so that the prepared unfired ceramsite is high in strength and excellent in durability on the premise that the light weight is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of auxiliary materials for building materials, and more specifically relates to a solid waste-based non-burning high-strength ceramsite and a preparation method thereof. Background technique [0002] As an important coarse aggregate in lightweight aggregate concrete, ceramsite has the characteristics of light weight, good heat insulation and sound insulation performance, and is favored by the construction industry. However, traditional sintered ceramsite has high investment and huge energy consumption, which affects the application of ceramsite. Due to the emergence of non-fired ceramsite, it can be used directly after curing after molding, without the need for high-temperature firing process, thus effectively avoiding the energy consumption and environmental protection problems caused by high-temperature sintering, and the economic benefits are higher than traditional ceramics. Granular preparation method ...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B18/16C04B18/10
CPCC04B28/143C04B18/16C04B18/10C04B2201/50C04B18/141C04B18/08C04B7/02C04B22/10C04B18/146Y02W30/91
Inventor 潘艳张飞钱元弟周杨慈晓陶冶
Owner CHINA MCC17 GRP
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