Coarse aggregate for foam concrete and production device thereof

Abstract

The invention belongs to the technical field of civil engineering, and particularly discloses coarse aggregate for foam concrete and a production device of the coarse aggregate. The coarse aggregate comprises foam cement paste and a hollow material, wherein the hollow material is filled with the foam cement paste. Foam concrete prepared on the basis of the coarse aggregate has a more uniform and porous structure after being formed, and pores are independent from one another, so the foam concrete is lighter in weight and higher in strength, and has better compression resistance, water resistance and heat insulation effects than conventional foam concrete.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a coarse aggregate for foam concrete and a production device thereof. Background technique [0002] Foamed concrete has been widely used as an energy-saving building material. Its production process is basically: first weigh cement, admixtures, aggregates, composite admixtures and water, stir and mix, and then add the prepared foam solution Continue to stir evenly, and then pass through the pumping system for cast-in-place construction or mold molding, and a new type of lightweight building material with a large number of closed pores formed after natural curing. The currently commonly used foaming processes are as follows: [0003] (1) Dissolve the foaming agent in water, then add cement to stir and foam, and the slurry will foam naturally during the stirring process; [0004] (2) Use a high-speed mixer to vigorously stir the prefabricated foam, and then mix it with ...

AI Technical Summary

Problems solved by technology

[0006] The foamed concrete prepared by the above methods are all foamed under open conditions, the volume is not easy to control during foaming, and it is easy to shrink later; secondly, the foam in the foaming process is squeezed or dehydrated during mixing with cement And other reasons will lead to partial fragmentation, and in the process of cast-in-place construction or mold forming, due to the unstable structure of some foam, lack of toughness, easy to break, and some foam floats up before the initial setting, the amount of foam in the final foam concrete will decrease and the foam distribution will be uneven. , the slurry lacks the collective support of the air bubbles, resulting in collapse, and the strength is greatly reduced; moreover, the diameter of the foam at different positions in the cement slurry increases to varying degrees with time, which will lead to different diameters of the foam, resulting in The capacity of the foam rate decreases, which will eventually affect the quality of the foam, and then affect the mechanical properties of the foam concrete

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