RU1815256C - Binder composition - Google Patents

Abstract

SUMMARY OF THE INVENTION: The cement contains 60-70% of suction dust from lime kilns and dust - the rest is carried away by ferrosilicon production. As a regulator of the setting time, it may contain the addition of two-water gypsum in an amount of 4% of the mass in the binder. The binder components are mixed, mixed with water and mixed with sand. Curing characteristics: strength 28 days after steaming 221-230 kg / cm2, after normal hardening 2 17-2 19 kg / cm2. 1 tab.

Description

The invention relates to the building materials industry and can be used in the manufacture of mortars.

An object of the invention is to improve the strength properties of a binder.

This is achieved by the fact that the cement, including dust fly ash from the production of ferrosilicon, contains lime dust from lime kilns in the following ratio of components, wt.%: Dust - fly ash from the production of ferrosilicon 30-40 Aspiration dust from lime kilns 60-70 As regulations The set retention time may contain the addition of two-water gypsum in an amount of 4% by weight of the set.

Comparative analysis with the prototype shows that the proposed cementation differs from the known topic. which provides for the introduction of a new component -

suction dust of lime kilns (lime dust) instead of lime .; . Having similar features with the well-known: technical solutions, the proposed offer is characterized by a new qualitative; numerical and quantitative composition and has higher strength properties. The achieved positive effect is inextricably linked with the proposed combination of distinctive features that were not known in the manufacture of building materials or in other areas of technology.

Example. Lime dust, which is a finely dispersed material with a specific surface of 7600 cm2 / g, an activity of 65%, and a quench rate of 3 minutes, which corresponds to grade III quick-extinguishing lime in accordance with GOST 9179-74, is mixed in dry form with fly ash dust produced by ferrosilicon, enter all the water of creation (its quantity is determined previously empirically from the condition of ensuring dispersal

WITH

ate about

floating standard cone 110mm). stirred for 3 minutes, then sand was added and mixed until smooth.

In all compositions, cement was mixed with Volsky sand in a ratio of 1: 3 according to GOST 310.4-76.

Samples of beams of 4x4x1 b cm in size are prepared from the resulting solution. Some of the samples are subjected to heat-moisture treatment, and some hardens under normal conditions within 28 days.

The preparation of the mixture according to the prototype (using dry ground lime) is carried out identically.

The ratio of components and test results of the samples are shown in the table.

As can be seen from the results obtained, the strength of the samples of the proposed cement is higher than the strength of the samples of the prototype by an average of 25-35%. The decrease in the strength of the cement in composition 1 occurs due to the low content of lime dust, and in

0

5

0

composition 4 — low dust-fly content of ferrosilicon production.

In the case of the use of dry lime (according to the prototype), defects are observed on the samples, indicating late extinction, which affects the strength of the samples.

The use of the proposed in comparison with the prototype can improve the quality of products.

Claims (1)

The claims A binder comprising a calcareous component and fly ash of ferrosilicon production, characterized in that. that, in order to increase strength, it contains aspiration dust of lime kilns as a calcareous component in the following ratio of components, wt.%: Dust dust lime kilns 60-70 Dust fly production ferrosilicon 30-40