SU983097A1 - Binding - Google Patents

Description

(54) BINDING

The invention relates to the composition of living materials that can be used in the industrial construction materials, mainly in the production of asbestos-cement products, concrete, reinforced concrete.

It is known in the form of portland cement in its pure form, as well as with the inclusion of additives 1..

The closest in technical essence and the achieved result to the proposed is a binder, including Portland cement 97.0-99.5% n sodium sulfide additive 0.5-3.0% 2.

However, the known cement have low strength characteristics in the early periods of natural hardening, which makes it difficult to commission products after their manufacture.

To speed up the commissioning of products, the latter, after molding, are subjected to hydrothermal treatment by steaming at 70-100 ° C for 8-24 hours.

The use of sodium sulfide supplement is scarce, unstable during storage, and decomposes in air, releasing hydrogen sulfide. Its use is difficult and possible only at the time of cement mixing, which requires the preparation of an aqueous solution with a certain concentration of this additive. In addition, this additive is expensive and, despite being introduced in insignificant amounts, it increases the cost per person.

The purpose of the invention is to increase the strength of a thruster during compression.

The goal is achieved by the fact that in ts, a stinging comprising Portland cement and metal sulphide contains calcium sulphide as metal sulphide, with the following component ratio, wt%:

Portland cement75.0-99.5

20

Sulfur Calc

(calcium sulfide) 0.5-25.0

Portlandite clinker and gypsum are ground together with the addition of calcium sulfide.

3983097

Yush together mix pre-milled additive with cement.

The resulting shutter is filled with water (1: 0) to a normal thickness test, from which the beams are molded (1.5x1.5x6 cm). In tab- $

The face shows the properties of the proposed known in the merger

Strength 1: 0 in samples of 1.5x1.5x6 cm, steamed at 55-60 ° C for 6 hours, depending on the% of metal sulfide additions 0 (table). Use Portland M-500.

From the data in the table, the optimal composition for the proposed tamper according to the bending and compressing parameters of samples made according to GOST, is with the addition of 15

to Portland cement 5-10%.

100

25

Claims (2)

Invention Formula Including, including portland cement and metal sulphide, characterized by The economic effect of the invention is to increase the prospect of the hell, the ability to replace high-firing clinker with a low-firing additive in the amount of 0.5-25.0%. In addition, the proposed one has a prime cost of one ton of cement 80 kopecks lower than pure portland cement (the prime cost of portland cement without an additive is 16 rubles). The introduction of calcium sulfide additives into Portland cement, in contrast to the known, does not require the preparation of its aqueous solution, and is carried out by joint grinding with clinker or mixing the components. 100 270,60 100 77.5 the fact that, in order to increase the compressive strength, it contains as a metal sulfide - calcium sulphide, in the following ratio of components, wt.%; Portland cement 75.0-99.5 Calcium sulphate0-25.0 Sources of information taken into account in exp. 983097 Proceedings of the International Congress of the Chemistry of Cement, vol. 11, 1976. 2. Copyright sredatepstvr USSR N 711002, cl. C 04 B 7/14, 1978 (prototype).