Method for preparing foam concrete by secondary foaming

Abstract

The invention discloses a method for preparing foam concrete by secondary foaming, and belongs to the technical field of foam concrete preparation. The method includes: modifying polyester fibers and pearl fibers by water glass and hexadecyl trimethyl ammonium bromide to obtain mixed modified fibers, adding the mixed modified fibers into cement, adding coal ash, coal gangue and the like and water into the cement, stirring to mix, performing ball milling to obtain concrete pulp, preparing a foaming liquid from water, sodium dodecyl benzene sulfonate, triethanolamine and arachidonic acid, adding egg white into the cement and grinding for primary foaming, adding the foaming liquid into the cement for secondary foaming so as to obtain foam concrete pulp, shaping and maintaining to obtain the foam concrete. The prepared foam concrete is provided with a uniform porous structure, a water absorption rate of the foam concrete is lower than 8%, so that high anti-permeability is realized; in addition, the foam concrete has the advantages of low shrink, no cracking and high compressive strength, and is wide in application space.

Description

technical field [0001] The invention discloses a method for preparing foam concrete by secondary foaming, and belongs to the technical field of foam concrete preparation. Background technique [0002] Foamed concrete is a new type of thermal insulation material with waste utilization, environmental protection, energy saving, low price and good performance. Compared with aerated concrete, it can be cured and hardened naturally, and generally does not need autoclaving; there is no autoclaved aerated concrete Energy consumption and huge equipment investment, the production is very simple, and the investment is very small; more importantly, foam concrete can not only be produced into various products in the factory, but also can be constructed on site, directly cast into roofs, floors and For walls, there are many more types of foamed concrete products than aerated concrete products. In addition to being used to produce blocks and wall panels, foamed concrete can also produce t...

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention: Aiming at the defect that the existing foamed concrete is easy to shrink and crack, the compressive strength is low, and the pores are large, resulting in high water absorption and poor impermeability, it provides a Foaming of protein, foaming with foaming liquid, and the method of preparing foamed concrete after secondary foaming, the present invention first uses water glass and cetyl trimethyl ammonium bromide to modify polyester fiber and pearl fiber , to get mixed modified fiber, then add it to cement, and add fly ash, coal gangue and other substances and water, stir and mix, ball mill to get concrete slurry, and then use water, sodium dodecylbenzene sulfonate, triethanolamine Foaming solution prepared with peanut oleic acid, firstly add egg white to the concrete slurry to grind for primary foaming, then add foaming solution for secondary foaming, obtain foamed concrete slurry, form and cure to obtain foam Concrete, the secondary foamed concrete of the present invention has a uniform porous structure, the water absorption rate is lower than 8%, and can achieve good impermeability, and the secondary foamed concrete of the present invention has low shrinkage, no cracking, compression resistance The advantage of high strength has a broad application space