Preparation method of stable-type odor-free low-density foam concrete foamer

Abstract

The invention relates to a preparation method of a stable-type odor-free low-density foam concrete foamer and belongs to the technical field of concrete foamers. The method includes the steps of: dissolving active components in humic acid by a NaOH solution, filtering the solution to remove impurities and dropwise adding hydrochloric acid to remove macro-molecular substances and modify water soluble small-molecular active components; by means of microorganisms in earthworm feces, fermenting active sludge in a secondary sedimentation tank to achieve deodorization; and enzymolysing the microorganisms and animal and plant proteins by means of protease, and compounding the enzymolyzed substances with the modified humic acid extract and sodium dodecyl benzene sulfonate to obtain the stable odor-free low-density foam concrete foamer. By means of octadecyl trimethyl ammonium chloride, hydrophobicity and lipophobicity of the small-molecular substances in the humic acid can be equilibrated, and through compounding with the protein in the active sludge and the sodium dodecyl benzene sulfonate, the problems of poor stability and low foaming times in a conventional concrete foamer are solved effectively. By means of the deodorization function of the earthworm feces, a problem of intensive stink of the foamer is solved.

Description

technical field [0001] The invention relates to a preparation method of a stable odorless low-density foam concrete foaming agent, belonging to the technical field of concrete foaming agents. Background technique [0002] Foamed concrete is made of cement, lime, fly ash, aggregates, admixtures and foam, etc., which are evenly mixed and poured and hardened. It contains a large number of closed pores in the new building material. It has good fluidity, light weight, and resources. The advantages of low consumption and excellent thermal insulation performance have been recognized, valued and applied more and more widely in the construction industry. [0003] In the prior art, commonly used concrete foaming agents mainly include: rosin resins, synthetics, proteins, etc., the main components of which are one or more surfactants. Rosin resin concrete foaming agent can only be used for density greater than 600kg / m2 because of its unsatisfactory foam stability and expansion ratio. ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention is: aiming at the problems of poor foam stability, unsatisfactory expansion ratio and strong odor during use of the traditional concrete foaming agent during use, it is not suitable for preparing low-density foam concrete. A stable odorless low-density foam concrete foaming agent was prepared by compounding humic acid extraction concentrate, secondary sedimentation tank activated sludge deodorized by vermicompost extract concentrate and sodium dodecylbenzenesulfonate method

The invention utilizes octadecyltrimethylammonium chloride to balance the hydrophobicity and oleophobicity of small molecular substances in humic acid, and through compounding with protein and sodium dodecylbenzenesulfonate in activated sludge, it effectively solves the problem of traditional concrete The problem of poor stability of foaming agent and unsatisfactory foaming ratio, and the deodorization function of vermicompost solves the problem of strong odor of foaming agent