Surface film-covered ceramsite for light-weight aggregate concrete and preparation method for surface film-covered ceramsite

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: 2014-05-28
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

[0026] The coated ceramsite in this embodiment is composed of round ceramsite and a silica fume slurry film layer covering the surface of the ceramsite, wherein the particle size of the ceramsite is 5-20mm, and it is continuously graded. The water absorption rate of ceramsite is 1wt%, and the silica fume slurry in the silica fume slurry film layer is composed of 0.5wt% silica fume and 99.5wt% water, and the external polycarboxylate water reducer accounts for 2.0wt of the silica fume mass %, the thickness of the silica fume slurry film layer is 50 μm.

[0027] The preparation method of surface-coated ceramsite for lightweight aggregate concrete described in the foregoing embodiments comprises the following steps:

[0028] (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 th...

Embodiment 2

[0032] The coated ceramsite in this embodiment is composed of round ceramsite and a silica fume slurry film layer covering the surface of the ceramsite, wherein the particle size of the ceramsite is 5-20mm, and it is continuously graded. The water absorption rate of ceramsite is 2.3wt%, and the silica fume slurry in the silica fume slurry film layer is composed of 1wt% silica fume and 99wt% water, and the external polycarboxylate water reducer accounts for 2.1wt% of the silica fume mass , the thickness of the silica fume slurry film layer is 55 μm.

[0033] The preparation method of surface-coated ceramsite for lightweight aggregate concrete described in the foregoing embodiments comprises the following steps:

[0034] (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 ...

Embodiment 3

[0038] The coated ceramsite in this embodiment is composed of gravel-type ceramsite and a silica fume slurry film layer covering the surface of the gravel-type ceramsite, wherein the particle size of the ceramsite is 5-20 mm, continuous grade Matching, the water absorption rate of the gravel-type ceramsite is 1.5wt%, and the silica fume slurry in the silica fume slurry film layer is composed of 1.5wt% silica fume and 98.5wt% water, and polycarboxylic acid is added to reduce water The agent accounts for 2.3wt% of the silica fume mass, and the thickness of the silica fume slurry film layer is 61 μm.

[0039] The preparation method of surface-coated ceramsite for lightweight aggregate concrete described in the foregoing embodiments comprises the following steps:

[0040] (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 we...

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Abstract

The invention provides a surface film-covered ceramsite for light-weight aggregate concrete and a preparation method for the surface film-covered ceramsite, and belongs to the technical field of concrete preparation. The surface film-covered ceramsite for the light-weight aggregate concrete consists of a ceramsite and a silicon mortar film layer covering the surface of the ceramic particle. The silicon mortar film layer contains small solid particles which can block a multiporous structure on the surface of the ceramsite; furthermore, the surface of the ceramsite has hydroscopicity, and the silicon mortar film layer contains water, so that the silicon mortar film layer can be easily attached to the surface of the ceramsite under the surface tension; the adhering force between the silicon mortar film layer and the surface of the ceramsite is high; even in a concrete stirring process, the mortar film layer cannot fall off. When the surface film-covered ceramsite is used for the light-weight aggregate concrete, mixed water cannot be adsorbed any more, and the working performance of the light-weight aggregate concrete can be greatly improved; meanwhile, the contraction rate of concrete or a concrete product is also lowered.

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 Applications(China)
IPC IPC(8): C04B20/10
Inventor 贾伟进孙占兴聂法智
Owner 北京中联新航建材有限公司
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