SU485990A1 - The method of preparation of porous lightweight concrete mixture - Google Patents

Description

one

The invention relates to the technology of building materials, in particular to methods for the manufacture of products and structures made of porous light concrete.

A known method of preparing a porous light concrete mixture, consisting of the following operations:

in the mixer pour heated to 60-70 ° C;

the mineral is injected into the trash, the aggregate and the mixture is moved within 2-3 minutes;

a foaming agent is introduced, the mixture is moved for 1 minute;

then a part of water was added, after which the mixture was thoroughly mixed again for 1 minute. Preparation of the mixture takes at least 5 minutes.

With this method of making porous light concrete, a significant amount of mixing water must be injected. Increasing the content of mixing water in porous lightweight concretes leads to a decrease in their strength properties and an increase in the volume mass. Products made from them have a relatively high technological humidity.

The purpose of the present invention is to reduce the water demand of the mixture and increase its uniformity. This is achieved by staying with water and part of the filler, for example

from 50-60% of the quantity required per batch, stirred for 1-1.5 minutes, then technical foam is added to the mixture, and the remaining

part of the filling and again mixed for 0.5-1 minutes.

The duration of the process for preparing the expanded clay foam concrete mixture according to this method is 3.5-4 minutes. In the manufacture of porous light concrete mix according to the new technology, its water demand is reduced by 10-15%, which leads to an increase in the strength of concrete, improved variability and uniformity coefficients for

strength and bulk weight of concrete.

Subject invention

A method for preparing a lightweight concrete mixture by mixing a mineral binder, a porous aggregate, water and technical foam, characterized in that, in order to reduce the water requirement of the mixture and increase its homogeneity, milling with water and part of the aggregate, for example from 50-60% mixing the quantities, stirring for 1-1.5 minutes, then technical foam is introduced into the mixture with stirring, then the remaining part of the aggregate and again stirred for 0.5-1 minutes.