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A hollow calcined-free lightweight aggregate and its preparation method

A technology for lightweight aggregates and raw materials, applied in the field of lightweight aggregates, can solve the problems of high energy consumption, unfavorable practical use, poor performance of hollow lightweight aggregates, etc. Effect

Active Publication Date: 2022-06-21
BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in order to make lightweight aggregates have better sound and heat insulation properties, they are mostly designed as hollow structural particles; however, on the one hand, hollow lightweight aggregates are mostly prepared by high-temperature calcination, which consumes a lot of energy. , the specific strength and other properties of the hollow lightweight aggregate are poor, which is not conducive to the subsequent practical use

Method used

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  • A hollow calcined-free lightweight aggregate and its preparation method
  • A hollow calcined-free lightweight aggregate and its preparation method
  • A hollow calcined-free lightweight aggregate and its preparation method

Examples

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Embodiment 1

[0049] The present embodiment provides a method for preparing light-weight aggregate, and the raw materials of the light-weight aggregate include: dry powder, polyphenylene particles and heavy calcium powder;

[0050] The preparation method of the dry powder is as follows: 30 parts of fly ash, 35 parts of slag, 25 parts of quicklime, 15 parts of P.O42.5 ordinary silicon cement, and 5 parts of industrial by-product gypsum are mixed uniformly and then ground, and the powder is ground. The final dry powder material requires 0.08mm sieve residue not more than 8%;

[0051] The particle diameter of described polyphenylene particle is calculated according to formula I; Described formula I is as follows:

[0052]

[0053] Among them, ρ represents the particle density of the lightweight aggregate, kg / m 3 ;R 1 Represents the particle size of the light aggregate, mm; R 2 represents the particle size of the polystyrene particles, mm;

[0054] Specifically, the design particle densi...

Embodiment 2

[0067] The present embodiment provides a method for preparing light-weight aggregate, and the raw materials of the light-weight aggregate include: dry powder, polyphenylene particles and heavy calcium powder;

[0068] The preparation method of the dry powder is as follows: 35 parts of fly ash, 28 parts of activated coal gangue powder, 25 parts of quicklime, 17 parts of P.O42.5 ordinary silicon cement, and 5 parts of industrial by-product gypsum are uniformly mixed and then ground. , the dry powder after grinding requires 0.08mm sieve residue not more than 8%;

[0069] The particle diameter of described polyphenylene particle is calculated according to formula I; Described formula I is as follows:

[0070]

[0071] Among them, ρ represents the particle density of the lightweight aggregate, kg / m 3 ;R 1 Represents the particle size of the light aggregate, mm; R 2 represents the particle size of the polystyrene particles, mm;

[0072] Specifically, the design particle densi...

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Abstract

The invention relates to a lightweight aggregate, in particular to a hollow calcined-free lightweight aggregate and a preparation method thereof. The raw materials of the lightweight aggregate include: dry powder and polystyrene particles; the particle size of the polystyrene particles is calculated according to formula 1; the dry powder is formed by mixing and grinding the components comprising the following parts by weight: 60 to 70 parts of the first component, 20 to 30 parts of the second component, 10 to 20 parts of cement, and 3 to 7 parts of industrial by-product gypsum; wherein, the first component is selected from fly ash, high silicon tailings One or more of ore, slag, activated coal gangue powder; the second component is quicklime and / or carbide slag. The preparation method provided by the present invention adopts the hydrothermal autoclaving reaction process under specific conditions, which does not require high-temperature calcination and melting of materials, and can greatly reduce energy consumption; at the same time, the hollow ratio and particle density of the obtained lightweight aggregate can be designed according to needs, that is, It has better specific strength, and also has better sound and heat insulation properties.

Description

technical field [0001] The invention relates to a lightweight aggregate, in particular to a hollow calcined-free lightweight aggregate and a preparation method thereof. Background technique [0002] Lightweight aggregate is prepared with light coarse aggregate, light fine aggregate or ordinary fine aggregate, cement, water, admixtures and admixtures, and can be used as concrete with an apparent density of not more than 1950kg / m2 3 ; Often named after the type of lightweight aggregate used, such as pumice concrete, fly ash ceramsite concrete, clay ceramsite concrete, shale ceramsite concrete, expanded perlite concrete, etc. [0003] At present, in order to make light aggregates have better sound insulation and heat insulation properties, they are mostly designed as hollow structural particles; however, on the one hand, hollow lightweight aggregates are mostly prepared by high-temperature calcination, which consumes huge amounts of energy. , the specific strength and other pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B20/12
CPCC04B20/12C04B16/08C04B20/1055C04B20/1066C04B20/1077C04B20/107C04B20/1037C04B20/1033
Inventor 张吉秀张晔王肇嘉苗元超段赛红
Owner BEIJING BUILDING MATERIALS ACADEMY OF SCI RES