SU1169953A1 - Binder - Google Patents

Abstract

BINDING, including granular converter slag and alkaline activator, characterized in that, in order to reduce thermal conductivity, increase strength and accelerate hardening, it contains alkaline melt as an alkaline activator and, in addition, the ratio of components, wt.%: Alkaline melt 5-15 Synthetic ... yulak electric furnace 5-15 production Air entraining 0.05-0.5 additive (O Granulir Ovan converter slag Else

Description

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The invention relates to the holding and can be used for the manufacture of various building materials.

The purpose of the invention is to reduce the thermal conductivity coefficient, increase the strength and accelerate the hardening of the binder.

As a pepticular activator, the alkaline melt contains caprolactam production, which includes at least 94% NajCO + NaOH, the rest is impurities and ppt. This additive contributes to the strength and acceleration of the permeate. The alkaline melt can be introduced into the composition as a joint during fine grinding of all its components, as well as with a trash water, in which it dissolves easily even at ordinary temperature.

Synthetic slags specially manufactured for steelmaking contain A120 not less than 50%; SiOj not more than 1.5%, CaO the rest. Despite the proximity of their composition to alumina cement, they practically do not have a tendency to self-hardening. However, with the addition of an activator, a hardening in finely divided form, when mixed with water or water with a hardening activator dissolved in it, they contribute to the acceleration of hardening, increase in strength and additional air entrapment. Therefore, the introduction of these pshaks together with a hardening activator into the composition of the slurry based on the converter slag allows to obtain a quick-hardening clinker-free slurry with enhanced thermal insulation properties while maintaining a sufficiently high strength of the cement stone.

To enhance the heat-shielding properties and reduce its bulk mass and thermal conductivity coefficient, an air entraining additive is introduced at the same time, for example, START, which also contributes to the hydrophobization of the cement stone and an increase in its frost resistance.

In accordance with the requirements of GOS 310.1-3-76, after the weight dosage of the components was prepared, cement paste was determined and its normal thickness, setting time and uniformity of volume change during hardening were determined.

To determine the grade of cement in accordance with the requirements of GOST 310.4-76, a cement slurry was prepared from 1 weight.h. in the live and 3 weight.h. normal Volsky sand with a water-cement ratio of not less than 0.4. Of. A solution of a low-plastic consistency was prepared by sample beams of 4x4x16 cm in size. The mark of the suspect was determined at the age of 7 days of hardening under normal conditions — as for fast-hardening in the burners.

Examples of compositions and test results are presented in table. 1 and 2

From tab. 2, it is clear that the proposed binder has an earlier setting time than the known one, and the strength is 3–3 times higher with a lower bulk density and higher thermal insulation properties.

Thus, the application of the proposed in the shearer provides a faster commissioning of concrete and reinforced concrete structures and structures and material savings, reducing the thickness of walls of enclosing structures of concrete and reinforced concrete, made on the ground, as well as reducing the thickness of the bases for such structures, as the latter create less stress. The economic effect is 300 million rubles / year.

Table 1

Granular converter putty

Ground converter slag Alkaline melt

Synthetic slag of electric steel production

Sour granulated blast furnace slag

74.7

30 7.510

7.5

60 0.3

Table 2

Claims (1)

BINDING, including granular converter slag and alkaline activator, characterized in that, in order to reduce the thermal conductivity, increase strength and accelerate hardening, it contains alkaline melt as an alkaline activator and, in addition, a synthetic steelmaking furnace and an air-entraining additive in the following ratio of components, wt.%: Soda-alkaline melt 5-15 Synthetic ... steelmaking slag Air entraining additive Granular converter slag 0.05-0.5 Rest SU „„ 1169953> 1 169953