阅读说明：本技术 一种提高泡沫混凝土预制泡沫稳定性的方法 (Method for improving stability of foam concrete precast foam ) 是由 高育欣 杨文� 闫松龄 毕耀 刘明 程宝军 康升荣 于 2019-11-11 设计创作，主要内容包括：本发明属于建筑材料领域,具体涉及一种提高泡沫混凝土预制泡沫稳定性的方法。本发明主要是克服现有技术中的不足之处,提供一种提高泡沫混凝土预制泡沫稳定性的方法,包括以下步骤：步骤S1、称量好所需的去离子水、微生物多糖、纳米粒子；步骤S2、将去离子水和微生物多糖混合搅拌,得到多糖混合物；步骤S3、将纳米粒子加入步骤S2得到的多糖混合物,混合搅匀,过筛,得到稳泡组分混合物；步骤S4、将稳泡组分混合物按比例加入发泡剂混合均匀。本发明原料易得,方法简单,对提高不同类型混凝土发泡剂预制泡沫的稳定性都有效果,具有广泛适用性。(The invention belongs to the field of building materials, and particularly relates to a method for improving the stability of foam concrete prefabricated foam. The invention mainly overcomes the defects in the prior art and provides a method for improving the stability of foam concrete prefabricated foam, which comprises the following steps: s1, weighing the required deionized water, microbial polysaccharide and nano particles; step S2, mixing and stirring deionized water and microbial polysaccharide to obtain a polysaccharide mixture; step S3, adding the nano particles into the polysaccharide mixture obtained in the step S2, mixing and stirring uniformly, and sieving to obtain a foam stabilizing component mixture; and step S4, adding the foam stabilizing component mixture into the foaming agent in proportion and mixing uniformly. The invention has the advantages of easily obtained raw materials, simple method, and wide applicability, and has the effect of improving the stability of the precast foams of different types of concrete foaming agents.)

1. A method for improving the stability of precast foam of foam concrete is characterized by comprising the following steps:

s1, weighing the required deionized water, microbial polysaccharide and nano particles;

step S2, mixing and stirring deionized water and microbial polysaccharide to obtain a polysaccharide mixture;

step S3, adding the nano particles into the polysaccharide mixture obtained in the step S2, mixing and stirring uniformly, and sieving to obtain a foam stabilizing component mixture;

and step S4, adding the foam stabilizing component mixture into the foaming agent in proportion and mixing uniformly.

2. The method for improving the stability of the foam concrete precast foam according to claim 1, wherein the mass ratio of the deionized water to the microbial polysaccharide to the nano particles is 8:1: 1.

3. The method for improving the stability of the foam concrete precast foam according to claim 2, wherein the microbial polysaccharide is one, two or three of xanthan gum, cellulose and gellan gum.

4. The method for improving the stability of the foam concrete precast foam according to claim 2, wherein the nano particles are one or more of nano silica, nano calcium carbonate, graphene and carbon nano tubes with a cement-based material having a gain effect.

5. The method for improving the stability of the foam concrete precast foam according to claim 4, wherein the ratio of the foam stabilizing component mixture to the foaming agent in the step S4 is 1-3: 100.

6. The method for improving the stability of the foam concrete precast foam according to claim 1, wherein the stirring speed in the step S2 is 200-500 rpm, and the stirring time is 15-30 min.

7. The method of claim 6, wherein the stirring speed in step S3 is 1500-3000 rpm, and the stirring time is 25-60 min; the mesh number of the sieve is 150-200 meshes.

Technical Field

The invention belongs to the field of building materials, and particularly relates to a method for improving the stability of foam concrete prefabricated foam.

Background

The foam concrete is a light building material, has excellent performances of heat preservation, heat insulation, fire resistance, sound insulation and the like, and can be used as a heat preservation and insulation material to be applied to the field of buildings. The foam concrete is generally prepared by preparing a foaming agent into prefabricated foam through a foaming system of the foaming agent, then uniformly mixing the prefabricated foam with cement slurry, then carrying out cast-in-place construction or mould forming through a pumping system of a foaming machine, and forming a porous structure containing a large number of closed air holes through natural curing. The properties of the precast foam (stability, distribution, size, etc.) are closely related to the properties of the foam concrete. Before the cement paste is hardened, the foam paste is liable to collapse due to deterioration of the preformed foam.

It is therefore important to provide a method for improving the stability of a precast foam of foamed concrete in order to obtain a precast foam that is maintained more stably in a cement slurry.

Disclosure of Invention

Aiming at the problems, the invention mainly overcomes the defects in the prior art and provides a method for improving the stability of foam concrete precast foam.

The technical scheme provided by the invention for solving the technical problems is as follows: a method for improving the stability of precast foam of foam concrete comprises the following steps:

s1, weighing the required deionized water, microbial polysaccharide and nano particles;

step S2, mixing and stirring deionized water and microbial polysaccharide to obtain a polysaccharide mixture;

step S3, adding the nano particles into the polysaccharide mixture obtained in the step S2, mixing and stirring uniformly, and sieving to obtain a foam stabilizing component mixture;

and step S4, adding the foam stabilizing component mixture into the foaming agent in proportion and mixing uniformly.

The surface of the polysaccharide has higher hydroxyl content, hydrogen bonds are easily formed with active hydroxyl on the surfaces of the nanoparticles, and the hydrogen bonds on the liquid film are larger than intermolecular dipole effect, so that the strength and viscosity of the liquid film can be enhanced.

The further technical scheme is that the mass ratio of the deionized water to the microbial polysaccharide to the nano particles is 8:1: 1.

The further technical scheme is that the microbial polysaccharide is one, two or three of xanthan gum, cellulose and gellan gum.

The further technical scheme is that the nano particles are one or more of nano silicon dioxide, nano calcium carbonate, graphene and carbon nano tubes which are cement-based materials and have a gain effect.

The further technical scheme is that the ratio of the foam stabilizing component mixture to the foaming agent in the step S4 is 1-3: 100.

The further technical scheme is that the stirring speed in the step S2 is 200-500 rpm, and the stirring time is 15-30 min.

The further technical scheme is that the stirring speed in the step S3 is 1500-3000 r/min, and the stirring time is 25-60 min; the mesh number of the sieve is 150-200 meshes.

Compared with the prior art, the invention has the following beneficial effects: the invention has the advantages of easily obtained raw materials, simple method, and wide applicability, and has the effect of improving the stability of the precast foams of different types of concrete foaming agents.

Detailed Description

The present invention will be further described with reference to the following examples.