RU2417964C1 - Finishing composition - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention relates to construction materials and can be used finish concrete and plastered surfaces. The composition for finishing concrete and plastered surfaces contains air-slaked lime, water, filler in form of dyed powder obtained through deposition from liquid glass while successively adding chromophore - copper sulphate CuSO₄ and iron chloride FeCl₃ and oxidising agent - calcium chloride CaCl₂, with the following ratio of components in wt %: air-slaked lime 30-45, said powder 10-15, water 45-55.

EFFECT: high adhesion, strength, reduces staining of the surface of the coating based on dyed coating compositions.

2 tbl

Description

The invention relates to compositions used for finishing concrete and plaster surfaces.

Known compositions containing cement, lime dough, calcium chloride, iron minium (and.with. 666146, C04B 28/18, 1977).

The closest in technical essence and the achieved result is a composition containing lime dough, ground mineral additive, pigments, water (P. N. Klochanov, A. E. Surzhanenko, I. Sh. M .: Stroyizdat, 1973, p. 75).

The disadvantage of these compositions are low adhesion, strength, surface staining of coatings based on colorful compositions.

The objective of the invention is to remedy these disadvantages.

The problem is solved in that the composition for finishing concrete and plaster surfaces, including lime powder, filler, water, contains colored powder as a filler, obtained by precipitation from liquid glass with the successive introduction of copper chromophore sulfate CuSO ₄ and iron chloride FeCl ₃ and precipitant - calcium chloride CaCl ₂ in the following ratio of components, wt.%:

Lime pushonka 30-45

Specified Powder - 10-15

Water - 45-55.

The colored powder is synthesized by precipitation from liquid sodium glass with the sequential introduction of the precipitating agent — calcium chloride CaCl ₂ and the chromophore — copper sulfate CuSO ₄ and FeCl. The colored powders consist of calcium hydrosilicates, hydrated silica, hydrosilicates of chromophore metals of 90-100 nm in size, interacting with lime, resulting in increased strength of the lime coating. The dispersion of colored fillers is characterized by a specific surface area of 30 to 40 m ² / g.

The preparation of the composition for decoration is as follows.

Liquid glass with a density of 1.46 g / cm ^{3 is} loaded into a mixer of any type and diluted with water in a ratio of 1: 3, mixed, then the chromophore is introduced and mixed again, and then calcium chloride CaCl ₂ is added in the form of a 15% solution. The precipitate obtained is filtered off and mixed with the calculated amount of lime-fluff and water. The resulting mass is mixed.

Specific examples of the compositions and their properties are given in table 1, 2.

Table 1 Name of ingredients Compositions, wt.% I II III IV V prototype Lime Fluff 45 thirty 40 46 29th thirty Filler 10 fifteen 12 8 16 fourteen Water 45 55 48 48 55 42 Pigment - - - - - fourteen

table 2 The name of indicators The compositions of the examples I II III IV V prototype Portability the choir the choir the choir unfortunate unfortunate the choir Drying time, min: to degree 3 10 fifteen fourteen fifteen 12 45 to degree 5 twenty 25 22 12 10 80 Adhesion, MPa 1.4 1,6 1,2 0.8 1,1 0.6 Compressive strength in age 28 days, MPa 4.8 5.1 4.2 2,8 4.6 0.8 Surface stain Absent Absent Absent Absent Absent Is available Appearance Quality Class Yi Yi Yi Yi Yi Yii

Claims (1)

Composition for finishing concrete and plaster surfaces, including lime powder, filler, water, characterized in that it contains colored powder as a filler, obtained by precipitation from liquid glass with the successive introduction of copper chromophore sulfate CuSO ₄ and iron chloride FeCl ₃ and precipitant - calcium chloride CaCl ₂ in the following ratio, wt.%:
Lime Fluff 30-45 Specified Powder 10-15 Water 45-55