Surface-coated ceramsite for lightweight aggregate concrete and preparation method thereof

A technology of lightweight aggregate concrete and ceramsite, which is applied in the field of concrete, can solve the problems of increasing ceramsite manufacturing cost, long time, and affecting work efficiency, and achieve the effect of improving work performance, reducing shrinkage, and facilitating bonding

Inactive Publication Date: 2016-04-27
北京中联新航建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that in the prior art, after covering the surface of the ceramsite with a hydrophobic shell, it will affect the compressive strength and stability of the concrete. Broken and falling off, the porous structure on the surface of the ceramsite cannot be effectively improved. In addition, the use of coconut oil and other chemical additives will increase the manufacturing cost of the ceramsite, and the process involves dipping and drying, which takes a long time and consumes a lot of energy. Large, affect work efficiency, and then provide a surface-coated ceramsite and ceramsite that can effectively improve the porous structure of the ceramsite surface without reducing the strength and stability of the concrete, and has low cost, simple manufacturing process, and is convenient for improving production efficiency. its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The coated ceramsite in this embodiment is composed of round ceramsite and a fly ash slurry film layer covering the surface of the ceramsite, wherein the ceramsite has a particle size of 5-20 mm and is continuously graded. The water absorption rate of the ceramsite is 1.0wt%, and the fly ash slurry in the fly ash slurry film layer is composed of 1wt% fly ash, 99wt% water and 2.0wt% polycarboxylate mixed with fly ash quality. Composed of acid water reducer, the thickness of the fly ash slurry film layer is 50 μm.

[0028] The preparation method of surface-coated ceramsite for lightweight aggregate concrete described in the foregoing embodiments comprises the following steps:

[0029] (1) Determination of the water absorption rate of ceramsite: place the ceramsite at the natural environment temperature for a period of time, weigh 1kg of ceramsite, and then soak it in water for 1 hour, use a wet towel to absorb the water on the surface of the ceramsite, and then weigh it as ...

Embodiment 2

[0033] The coated ceramsite in this embodiment is composed of round ceramsite and a fly ash slurry film layer covering the surface of the ceramsite, wherein the ceramsite has a particle size of 5-20 mm and is continuously graded. The water absorption rate of the ceramsite is 2.3wt%. The fly ash slurry in the fly ash slurry film layer is composed of 2wt% fly ash and 98wt% water. 2.1% of the mass, and the thickness of the fly ash slurry film layer is 55 μm.

[0034] The preparation method of surface-coated ceramsite for lightweight aggregate concrete described in the foregoing embodiments comprises the following steps:

[0035] (1) Determination of the water absorption rate of ceramsite: place the ceramsite at the natural environment temperature for a period of time, weigh 1kg of ceramsite, and then soak it in water for 1 hour, use a wet towel to absorb the water on the surface of the ceramsite, and then weigh it as wet ceramsite The mass of the granules is calculated as 1.023k...

Embodiment 3

[0039] The film-coated ceramsite in this embodiment is composed of crushed stone-type ceramsite and a fly ash slurry film layer covering the surface of the crushed-stone-type ceramsite, wherein the particle size of the ceramsite is 5-20mm, continuous Grading, the water absorption of the crushed stone type ceramsite is 3.0wt%, and the fly ash slurry in the fly ash slurry film layer is composed of 3wt% fly ash and 97wt% water, and polycarboxylic acid The water reducer accounts for 2.3wt% of the fly ash mass, and the thickness of the fly ash slurry film is 61 μm.

[0040] The preparation method of surface-coated ceramsite for lightweight aggregate concrete described in the foregoing embodiments comprises the following steps:

[0041] (1) Determination of the water absorption rate of ceramsite: place the ceramsite at the natural environment temperature for a period of time, weigh 1kg of ceramsite, and then soak it in water for 1 hour, use a wet towel to absorb the water on the sur...

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Abstract

The invention provides surface-coated ceramsite for lightweight aggregate concrete and a preparation method thereof, belonging to the technical field of concrete preparation. The surface-coated ceramsite for lightweight aggregate concrete has the following structure: ceramsite and a slurry film layer covering the surface of the ceramsite. Because the slurry contains small solid particles, it can block the porous structure of the surface of the ceramsite; in addition, because the surface of the ceramsite has water absorption, the slurry film layer is easily attached to the surface of the ceramsite due to surface tension, and the slurry film layer and the surface of the ceramsite The adhesion on the surface of the ceramsite is strong, even in the process of concrete mixing, the slurry film layer will not fall off. When the surface-coated ceramsite of the present invention is used in lightweight aggregate concrete, it will not absorb mixing water again, can greatly improve the working performance of lightweight aggregate concrete, and also reduce the shrinkage rate of concrete or concrete products.

Description

technical field [0001] The invention relates to surface-coated ceramsite for lightweight aggregate concrete and a preparation method thereof, belonging to the technical field of concrete. Background technique [0002] Lightweight aggregate concrete refers to the dry apparent density of not more than 1950kg / m3 prepared by light coarse aggregate, light fine aggregate (or ordinary sand), cementitious material and water. 3 of concrete. Among them, the lightweight aggregate concrete prepared with light fine aggregate as aggregate is full lightweight concrete; the lightweight aggregate concrete prepared with ordinary sand or part of light fine aggregate as fine aggregate is sand lightweight concrete. Lightweight aggregate concrete is widely used in various projects due to its light weight, high strength, heat preservation, heat insulation, earthquake resistance, wear resistance and other functional characteristics. [0003] The lightweight coarse aggregate commonly used in light...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B14/02
Inventor 聂法智孙占兴贾伟进
Owner 北京中联新航建材有限公司
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