SU863545A1 - Raw mixture for producing cellulose concretes - Google Patents

Description

(54) RAW MATERIAL MIXTURES FOR MANUFACTURING The invention relates to the industrial use of building materials and can be used in the manufacture of thermal insulation products. The known raw mixture for the manufacture of cellular concretes, comprising a mixture of low-grade asbestos, a filler, a blowing agent, water and dispersed reinforcement. P. However, a small fiber length leads to the relaxation of products and does not give a significant increase in strength. The closest to the technical essence and the achieved effect to the invention is cellular concrete 2 including portland cement, silica component, aluminum powder and water in the following ratio of x to components, Bec.t: Portland cement 31.3 Silica component (ground sand) 31.3 Aluminum powder 0, Water37,3 The disadvantage of this cellular concrete is the relatively high bulk density and low tensile strength. CELLULAR CONCRETES The purpose of the invention is to reduce the bulk density and increase strength. The goal is achieved by the fact that the raw mix for the manufacture of cellular concretes, including portland cement, silica components, aluminum powder and water, contains TPP ash as a silica component and additional synthetic fibers 20-40 mm long with a trace ratio of components, weight. % Portland cement 28-30 Fly ash TPP 28-30 Aluminum powder 0.1-0.12 Synthetic fiber: 0.6-1.7 Water Remaining As synthetic fibers, materials are used that are waste materials (textile, adjusted to room etc.) - nylon, polyester, polypropylene. The optimal length of fibers introduced into the mixture is 20-40 mm. Table 1 shows the dependence of the bulk mass and tensile strength during bending of cellular concrete lines of the injected fibers.

Table

Aerated concrete

JUicnepcHO-reinforcement for "synthetic fibers

From Table 1 it can be seen that the use of fiber with a length of less than 20 mm is inefficient due to their slight improvement in the physicomechanical properties of cellular concrete. The introduction of a foil with a length of more than 40 mm makes it difficult to mix the mixture, leading to

0.6

0.8 0.8 1.3 1.3 1.4 1.0

clumping and degrades material properties. . .

The mixtures of the proposed formulations are manufactured and tested according to GOST 12852-67 Cellular concrete sample batches. The test results are shown in table 2.

Claims (2)

Table 2 From Table 2 it can be seen that the introduction of kapron FIBERS into cellular concrete increases its strength by more than 2 times, and the bulk weight decreases sharply. Using the proposed raw mix compared to known compounds will expand the raw material base of building materials, improve construction -technical indicators of cellular concretes, namely, to increase the strength indicators, to reduce the bulk density of products, and therefore, their heat conductivity, to increase the impact strength, thereby punctures and cracks in the products during disintegration, transportation of scientific research institutes and installation. Also, it will allow utilization of industrial wastes, reduce the final cost of products by reducing metal armature, or completely eliminating it, using dispersed armature1Ж1 instead of expensive natural and artificial fibers of widely available production and processing of synthetic fibers, reducing reinforcement work or eliminating those from technological process. According to preliminary estimates, the use in the production of cellular concretes of fibers of just one combination of flax and twisted products | waste of which 54 tons per year will amount to 18 thousand rubles. Formula of the invention Raw mix for making cellular concretes, including Portland cement, silica component, aluminum powder and water, characterized in that, in order to decrease bulk weight and increase strength, it contains as a silica component Zoluunos CHP and additionally synthetic fibers of length 20- 40 mm in the following ratio of components, wt.%: Porlandcement28-30 Fly ash TPP28-30 Alk 1iekeva powder 0.1-0.12 Synthetic fibers 0.6-1.7 WaterErestal Sources of information taken into account when ek Spertiz 1, Cherishiov EM, Krokhin A.M. Increase the resistance of cellular concretes to brittle fracture. - Concrete and reinforced concrete, 1979, No. 5, pp.18-19. : 2. Yao’s Technical and Economic Assessment of Techniques for Forming Concrete and Concrete Products. Adventure 35. M., 1971, p.139.