Ionic-type foam concrete foaming agent and preparation method thereof

Abstract

The invention discloses an ionic-type foam concrete foaming agent and a preparation method thereof, belonging to the technical field of building chemical materials. The ionic-type foam concrete foaming agent is prepared from the following components in parts by weight: 1.5-3 parts of polydimethyldiallylammonium chloride, 0.4-1.2 parts of zwitterionic surfactant, 5-10 parts of anionic surfactant, 0.2-1 part of thickening agent and 70-80 parts of water. The ionic-type foam concrete foaming agent prepared by the method has the advantages that the raw materials are easy and convenient to obtain, the cost is relatively low, the foam stability is high, and the quality guarantee period of the foaming agent is long.

Description

technical field [0001] The invention belongs to the technical field of building chemical materials, and in particular relates to an ionic foam concrete foaming agent and a preparation method thereof. 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. Concrete foaming agent is one of the main factors affecting the performance of foamed concrete. [0003] At present, the commonly used foaming agents in China are mainly rosin, anionic surfactants and animal and vegetable proteins, and their product categories and performances are quite different. Although the price of rosi...

AI Technical Summary

Problems solved by technology

Although the price of rosin foaming agent is relatively low, its foaming ratio is low and the foam stability is poor; anionic surfactant raw materials are easy to get, and the foaming ratio is high, occupying a large market all the time, but because of its foam Poor stability, when preparing ultra-low density (150~300kg / m 3 ) foam concrete, there are often adverse phenomena such as mold collapse and bleeding; animal and plant protein foaming agents have a foam stabilizing effect It is better and has been recognized at home and abroad, but due to its high cost and short shelf life, its wide-scale application is limited

Making full use of the advantages of high foaming ratio of anionic surfactant foaming agents, modifying it and improving its foam stability is one of the ways to produce high-performance foaming agents, as disclosed in Chinese patent CN102911674 A: by adding large Molecular alcohols change the arrangement of active agent molecular intervals, reduce the repulsion between active agent molecules, improve the quality of the liquid film, and reduce the air permeability of the foam; this method improves the foam stability, but due to its The viscosity of the foam is too high, and the dispersibility in the slurry is poor, so that the smoothness and gloss of the prepared foam concrete surface are not ideal