SU967985A1 - Binder - Google Patents

Description

(54) BINDING

This invention relates to cracking technology.

Known quick-hardening cements, containing in their composition hrsm-containing clinker, comprising 0.5% Cr, jOj ..,.

Also known is ultrahigh-hardening cement from clinker, including CjS 65-85%, CjA 7-13%, 3-1.5% and F 0.2-1%. When grinding, gypsum is added to such a clinker with 4 so that the content of 50z in the finished product is 1.5-4.5% 2. However, such cement does not have the ability to expand, the clinker to obtain such cement has a reduced grinding capacity, and so on. ness.

The object of the present invention is to increase the grindability, the strength of a gang, and to give it the ability to expand. .

The goal is to reach t & l, that the slurry, including chrome-containing clinker and gypsum, contains sulphate-containing aluminosilicate material in the following ratio of components, wt.%:;

XpoMCQ holding clinker 89-33 Gypsum 4-5

Sulfate-containing aluminosilicate material3-6.

Moreover, the sulfate-containing aluminosilicate material contains the following components, wt.%: Amorphous silica 25-30

Sernszhisly

ten

aluminum25-30

Ferrous Sulfate 5-10 Metakaolinite 15-20 Ferric oxides. Other

15 Temple-containing clinker is characterized by a CjS content of 60-65%, CjS 15-24%, CjA 3.5-7%, C4AP 10-12% and up to 3%.

20

The characteristic of the grindability of the slurry is the time required for grinding to a specific surface area of 3800 cm7G. Grind characterize in percent

25 for 100% of the time taken to grind to the specified cement specific surface, including chrome-containing clinker and gypsum. The ultimate strength of poi compression and expansion in the ground is characterized by

28 days. age The results of the determinations are given in the table.

From the data in the table it follows that the introduction of a sulfate-containing aluminosilicate material promotes an increase in the grindability of the host by more than 25%, provides an increase in the compressive strength by more than 10 MPa and provides for the expansion of the samples to 0.5%. In addition, the presence of sulfate-containing alnosilicate material neutralizes the harmful effects of cement.

Claims (3)

Claim 1. A binder, including chrome-containing clinker and gypsum, characterized in that, in order to increase the grindability, strength of the binder and give it the ability to expand, · it contains sulfate-containing aluminosilicate material in the following ratio of components, wt.%! Chrome containing clinker Gypsum Sulfate-containing aluminosilicate material The aluminosilicate material contains the following components, wt.%: 25-30 2 & -30 5-10 15-20 Else 89-93 4-5 3-6 2. The binder according to claim 1, further with the fact that I distinguish sulfate content Amorphous dioxide: silicon. Aluminum sulfate. Ferrous sulfate. Metakaolinite. Iron oxides.