SU798065A1 - Binder - Google Patents

Description

(54) BINDING

The invention relates to building materials and can be used in the production of sulphate resistant in the living. Known to the gnaw, including Portland cement clinker and ash of the sludge kukersit 1 The closest to the proposed technical essence for the gnawing 2, including, wt.%: Sulfate-resistant portland cement clinker 60 and fly ash 40. insufficient strength of concrete based on them. The purpose of the invention is to reduce water demand and increase strength. The goal is achieved by the fact that, as an additive, including sulphate-resistant portland cement clinker and ash additive, contains as an additive the fly ash of slate-kukersite with a specific surface area of 3200-4000 and a free lime content of 7-10 with the following ratio of components, wt .: -, . - .. } —rg i: .. Portland cement clinker68-73 Ash additive27-32 The addition of the smallest fraction of fly ash from slate-kukersite shades reduces the water requirement of the cement mortar, giving the cement plasticizing properties. Plasticized cement reduces the water requirement of concrete and increases its frost resistance. In addition, the addition of the smallest fraction of fly ash from shale-kukersite accelerates the increase in strength in the initial periods of hardening. A comparison of the chemical composition of the fly ash used as a pozzolanic additive and the smallest fraction of volatile ash of slate-kukersite is given in Table. 1. The chemical composition of the substance is presented in table. 2. Sulfate-resistant Portland cement clinker and ash of slate-kukersit is subjected to joint grinding in a balloon mill opened

37980654

this or a closed cycle until it is obtained, it is both sulphate-resistant and plastic-like surface in the 3200-fd dredged state.

3400 cm / g. At the specified chemical composition, physicomechanical indices

All to the bottom with the addition of fly ash are simultaneously shown in Table. 3

Sioj

Table 1

30-34

45-J60

27 30 32

73 70 68

4 (out of 80

well-known) Q

Claims (2)

60 Claims of invention 10% in the following ratio, wt.%: 20 30 cl. Punane-Kund Portland cement clinker containing a 7.1% corrosion resistance coefficient is determined by testing samples stored in a 5% NajS04 solution. Portland cement clinker 68 - 73 Additive of ash 27 - 32 Sources of information taken into account during the examination 1. Author's certificate of the USSR N 178721, С 04 В 7/28, 1960 2. Butg Yu. M. et al. Technologists in the field. M., 1965, p. 544-551.