Preparing method for hydrophobic ceramsite lightweight aggregate, hydrophobic ceramsite lightweight aggregate prepared with method and application of hydrophobic ceramsite lightweight aggregate

A light aggregate, hydrophobic technology, applied in the field of building materials manufacturing, to achieve good economic and environmental benefits, solve environmental pollution problems, and high hydrophobicity

Active Publication Date: 2019-08-13
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the resource utilization rate of these solid wastes is only about 10%, which is still far behind the "waste-free city" required by the state.

Method used

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  • Preparing method for hydrophobic ceramsite lightweight aggregate, hydrophobic ceramsite lightweight aggregate prepared with method and application of hydrophobic ceramsite lightweight aggregate
  • Preparing method for hydrophobic ceramsite lightweight aggregate, hydrophobic ceramsite lightweight aggregate prepared with method and application of hydrophobic ceramsite lightweight aggregate
  • Preparing method for hydrophobic ceramsite lightweight aggregate, hydrophobic ceramsite lightweight aggregate prepared with method and application of hydrophobic ceramsite lightweight aggregate

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preparation example Construction

[0041] The present invention proposes a kind of preparation method of hydrophobic ceramsite light aggregate, which comprises the following steps:

[0042] 1) The raw materials are mixed and granulated to obtain the first granule;

[0043] 2) pre-sintering the first particles to obtain the second particles;

[0044] 3) Coating a hydrophobic functional layer on the surface of the second particle to obtain the third particle;

[0045] 4) Calcining the third particle, lowering the temperature to below 400°C, taking it out, and cooling naturally to obtain hydrophobic ceramsite light aggregate.

[0046] When preparing ceramsite, first granulate according to the batching parameters of ceramsite raw materials. In the preparation process of ceramsite in the prior art, ceramsite is calcined after being dried at a temperature below 200 degrees after granulation to make finished ceramsite. However, in the present invention, the pre-sintered particles are pre-sintered, and then the surf...

Embodiment 1

[0081] Dry, crush, grind and homogenize 45% of shale, 26% of bauxite, 18% of fly ash, 7% of attapulgite and 4% of flux respectively, and control the sieve residue of 0.045mm square hole to 1.5 % within. According to the preparation parameters of ceramsite raw materials SiO 2 53wt%, Al 2 o 3 20wt%, Fe 2 o 3 5wt%, CaO 3wt%, MgO 1wt%, Na 2 O+K 2 O 2wt% for batching to form ceramsite light aggregate powder.

[0082] Subsequently, the powder was put into a granulator and sprayed with 15% atomized water to produce spherical particles with a particle diameter of 1.5 mm. Further, the spherical particles are pre-sintered, raised from room temperature to 150°C, and kept for 60 minutes; then heated to 750°C, kept for 30 minutes, and then naturally cooled to room temperature to make pre-sintered ceramsite. Place the pre-sintered ceramsite in the dripping sieve device, and then simultaneously sink into the stearate-methyl silicon alkoxide pretreatment solution (1:1) with a mass ...

Embodiment 2

[0085] Dry, crush, grind and homogenize 46% of waste incineration ash, 25% of gasification slag, 18% of fly ash, 7% of attapulgite and 4% of flux, respectively, and control the residue on a 0.045mm square hole sieve within 1.5%. According to the preparation parameters of ceramsite raw materials SiO 2 53wt%, Al 2 o 3 20wt%, Fe 2 o 3 5wt%, CaO 3wt%, MgO 1wt%, Na 2 O+K 2 O 2wt% for batching to form ceramsite light aggregate powder.

[0086] Subsequent process is with embodiment 1.

[0087] After testing, the water absorption rate of ceramsite is 1.5% in 1h, 1.8% in 2h, 4.2% in 1d, 8.6% in 28d, the cylinder compressive strength is 4.4MPa, the bulk density is 400, and the sound absorption coefficient is 0.89.

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Abstract

The invention provides a preparing method for hydrophobic ceramsite lightweight aggregate, the hydrophobic ceramsite lightweight aggregate prepared with the method and application of the hydrophobic ceramsite lightweight aggregate. The method includes the following steps that a raw material is prepared and granulated, and a first particle is obtained; the first particle is pre-sintered, and a second particle is obtained; the second particle is coated with a hydrophobic function layer, and a third particle is obtained; the third particle is calcined, is cooled to 400 DEG C or below, and is taken out and naturally cooled, and the hydrophobic ceramsite lightweight aggregate is obtained; the raw material comprises solid waste, and is selected from at least one of waste incineration ash residues or manganese residues or gasification residues or aluminum-factory waste residues; according to the mass percentage content, the content of the solid waste is larger than or equal to 40%. By means of the preparing method, the more newly-developing soil waste such as the waste incineration ash residues or the manganese residues or the gasification residues or the aluminum-factory waste residues can be more effectively digested, and meanwhile the hydrophobicity and the sound insulation function of the ceramsite lightweight aggregate are improved; the preparing method has good development prospects, and therefore is more suitable for practicality.

Description

technical field [0001] The invention belongs to the field of building material manufacturing, and in particular relates to a method for preparing hydrophobic ceramsite light aggregate by using emerging solid waste, the hydrophobic ceramsite light aggregate prepared by the method and its application. Background technique [0002] Ceramsite lightweight aggregate is a kind of man-made lightweight aggregate, which is calcined at high temperature and expanded to form a honeycomb structure with strength and hardness, so it is often used to replace pebbles and crushed stones in concrete. However, ordinary ceramsite lightweight aggregates have greater water absorption properties, which are significantly different from ordinary sandstone aggregates. Due to the water absorption of ceramsite light aggregate, the delamination and segregation of light aggregate concrete and the excessive slump loss will increase the shrinkage of concrete, thereby reducing the strength, heat preservation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B33/135C04B33/138C04B33/132C04B35/14
CPCC04B35/622C04B33/1325C04B33/138C04B33/132C04B35/14C04B2235/3427C04B2235/483C04B2235/447C04B2235/3409C04B2235/442C04B2235/3217C04B2235/3481C04B2235/3463C04B2235/422C04B2235/3206C04B2235/3208C04B2235/3201C04B2235/448C04B2235/3262C04B2235/3267C04B2235/3272C04B2235/3224C04B2235/36C04B2235/349C04B2235/96C04B2235/77Y02P40/60
Inventor 刘姚君康艳文房晶瑞汪澜刘晶文寨军
Owner CHINA BUILDING MATERIALS ACAD
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