Foam concrete preparation system and foam concrete preparation method

Abstract

The invention discloses a foam concrete preparation system, which comprises a cement slurry stirring device, a cement slurry delivery device, a high-pressure air delivery device and a foam concrete generating device; a slurry inlet and an air inlet are formed in one end of the foam concrete generating device; a finished product delivery outlet is formed in the other end of the foam concrete generating device; the cement slurry stirring device communicates with the slurry inlet of the foam concrete generating device through a cement slurry delivery pipeline; and the outlet of the high-pressure air delivery device communicates with the foam concrete generating device. The invention also provides a foam concrete preparation method. The foam concrete preparation system and the foam concrete preparation method disclosed by the invention have the beneficial effects: after being mixed with a foaming agent, the cement slurry is mixed with high-pressure air to prepare foam concrete; cells in the foam concrete are evenly distributed; difference between sizes of the cells is not big; difference between density levels is relatively small; water cement ratio is stable; and the problem that a large amount of foam is generated due to the fact that a cement slurry body is mechanically mixed with foam in a traditional method is avoided.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a foam concrete preparation system and method. Background technique [0002] At present, the air compression method is mostly used in the construction field to produce foamed concrete. The specific steps are as follows: first, mix the cement, mineral admixtures and water in a certain proportion in the mixing equipment, and transport them to the pipeline through the delivery pump; secondly, Mix the foaming agent according to a certain ratio, and mix it with compressed air through the foaming agent delivery pump (that is, the air compression method) to generate dense foam in the pipeline; finally, the cement slurry and foam are mechanically mixed in the pipeline. The foam concrete produced by this type of equipment has the following disadvantages: the distribution of cells inside the foam concrete is uneven, the cell diameter is between 0.1mm and 1.5mm, the size of the cells va...

AI Technical Summary

Problems solved by technology

The foam concrete produced by this type of equipment has the following disadvantages: the distribution of cells inside the foam concrete is uneven, the cell diameter is between 0.1mm and 1.5mm, the size of the cells varies greatly, and the cells with larger diameters are not suitable for foam concrete. The strength and thermal performance are adversely affected; there are a large number of defoaming and non-uniform defoaming problems in the mechanical mixing of cement paste and foam (the defoaming rate, that is, the volume ratio of the eliminated foam to the actual added foam is 10 %~20%), this kind of problem will increase the initial water-cement ratio of foamed concrete, and the density level of the produced foamed concrete will vary greatly (the density level deviation is 8%~15%), which will affect the strength of foamed concrete and properties, but also increase the production cost of foam concrete

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