RU2803738C1 - Spackling paste - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention can be used in the manufacture of finishing compositions for levelling concrete and plastered surfaces. It proposes a spackling paste, composed of a mineral binder, filler, additive and water. Hydrated lime is used as a mineral binder, and marshalite is used as a filler. The supplement is oatmeal.

EFFECT: accelerating curing of the spackling paste.

1 cl, 5 tbl

Description

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

A known composition includes residual synthetic fatty acids, carboxymethylcellulose, soda ash, laundry soap, and chalk [1].

The closest in technical essence and achieved result is putty, including fluff lime, silicate brick production waste, low molecular weight polyethylene emulsion, Bermocoll CCA 425 additive, water [2].

The disadvantages of the prototype are the slow curing times.

The objective of the invention is to eliminate these disadvantages

The problem is solved by the fact that the putty, including a mineral binder, filler, additive, water, contains slaked lime as a mineral binder, marshalite as a filler, and oatmeal as an additive in the following ratio of components, wt.%:

slaked lime 16-20 marshals 36-43 oat flour 0.7-1.3 water 40-43

The technology for preparing putty consists of preparing a paste from oatmeal (mixing warm water and oatmeal, then brewing with boiling water) and then introducing the paste into a mixture of lime and marshalite and then mixing the entire mass.

The following materials were used to prepare the putty:

- building lime (GOST 9179-77);

- marshalite GOST 9077-82 (GOST 9077-82) - table 1;

- flour based on naked oats R-2.

Slaked lime (fluff) was used with an activity index of 84%, a true density of 2200 kg/ ^m3 , a bulk density of 480 kg/ ^m3 , and a specific surface area of 1050 ^m2 /kg.

Tyumen naked oats R-2 were used. The oats were crushed and the oat flour was first sifted through a sieve with 625 holes/ ^cm2 . The characteristics of oats (per 100 g of oats) are given in Table 2.

To study the properties of the presented formulations of the composition and coatings based on it, the following methods were used: - drying time according to GOST 19007-73 “Paint and varnish materials. Method for determining the time and degree of drying" [3];

- adhesion - by the tear-off method according to GOST 32299-2013 (ISO 4624:2002) Paint and varnish materials. Determination of adhesion by peel-off method

The adhesive strength of coatings was determined by two methods: the lattice notch method and the stamp removal method.

To assess the adhesive strength, the stamp tear-off method (normal tear-off) was used according to GOST 32299-2013 “Paint and varnish materials. Determination of adhesion by the peel-off method." The method consists of measuring the force required to lift the coating from the concrete surface using a glued metal stamp of cylindrical shape with a diameter of 18 mm. The pullout force was measured using a dynamometer. Epoxy glue (EDP-TU 0751-018-48284381-00) was used to glue the stamps to the coating. The adhesion strength of the paint to the substrate ^Rsc , MPa was determined by the formula:

where P is the pull-out force, N;

F is the contact area of the stamp with the paint and varnish coating, ^m2 .

Specific examples of putty formulations and properties of coatings based on it are given in Tables 5, 6.

For an experimental study of the quality of substrates, plates made of cement-sand mortar were used.

BIBLIOGRAPHY

1. А.с.544631 Construction putty (MPK S04B 25/04 (1990.01) Application: 2311142. Date of application: 1975.11.25. Publ.: 1977.01.30. Authors: Pogorelskaya Klara Yakovlevna, Kodochigova Svetlana Petrovna, Kondrashova Nina Vasiliev on , Zhidkova Galina Mikhailovna, Okhmanyuk Tamara Ivanovna.

2. Patent RU 2281263 Putty. IPC S04V 28/18 Application: 2004111621/03, 04/16/2004 Published: 08/10/2006 Bulletin. No. 22 Authors: Loganina Valentina Ivanovna (RU), Zakharov Oleg Aleksandrovich (RU), Kislitsyna Svetlana Nikolaevna. Patent holders: Federal State Budgetary Educational Institution of Higher Education "Penza State University of Architecture and Construction" (RU).

3. GOST 19007-73 “Paint and varnish materials. Method for determining the time and degree of drying" (with Amendments No. 1, 2). M.: IPK Standards Publishing House, 2003.

4. GOST 31356-2007 Dry building mixtures based on cement binder. Test methods. - M.: Strandartinform, 2008.

Claims (2)

Putty, including a mineral binder, filler, additive, water, characterized in that it contains slaked lime as a mineral binder, marshalite as a filler, and oatmeal as an additive in the following ratio of components, wt.%: slaked lime 16-20 marshals 36-43 oat flour 0.7-1.3 water 40-43