RU2822620C1 - Putty - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention relates to compositions of putty for levelling stone and concrete surfaces. Composition contains the following, wt.%: slaked lime 15–18, microcalcite KM-2 29.9–34.3, cellulose fibre LVJIAN^R Cellulose Fiber TM50 1.5–2.1, microwollastonite Mivoll 10–97 5.1–6.45, additive Atren RET G 0.15–0.2, water 42.3–44.

EFFECT: higher ductility and pot life of putty.

1 cl, 7 tbl

Description

The invention relates to putties used for leveling stone and concrete 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 lime paste, 10% aqueous solution of animal glue, ground chalk, hydrolytic lignin powder, liquid glass, styrene-butadiene latex and water [2]

The disadvantages of the prototype are insufficient viability and low ductility of the putty.

The objective of the invention is to eliminate these disadvantages

The problem is solved by the fact that the putty, including lime, filler, reinforcing fiber, microwollastonite, additive, water, contains slaked lime as lime, microcalcite KM2 as a filler, cellulose fiber LVJIAN ^R Cellulose Fiber TM50 as a reinforcing additive, microwollastonite as a filler. microwollastonite Mivoll 10-97, as an additive Atren RET G additive in the following ratio of components, wt. %:

Slaked lime - 15-18 Microcalcite grade KM-2 29.9-34.3 Cellulose fiber LVJIAN ^R Cellulose Fiber TM50 1.5-2.1 Microwollastonite Miwoll 10-97 5.1-6.45 Additive Atren RET G 0.15-0.2 Water 42.3-44

The technology for preparing the putty is to mix a mixture of all dry ingredients and water with the Atren RET G additive.

The following materials were used to prepare the putty:

- slaked lime (fluff) with an activity of 82%, a true density of 2200 kg/m ³ and a bulk density of 490 kg/m ³ (meets the requirements of GOST 9179-77);

- microcalcite grade KM2. The main indicators are shown in Table 1

- Atren RET G additive (TU2458-020-63121839-2011). The Atren RET G ^™ additive is made on the basis of modified lignosulfonates. The main indicators are shown in Table 2;

- microwollastonite Mivoll 10-97. The main indicators are given in Table 3;

- cellulose fiber LVJAN ^R Cellulose Fiber TM50. The main indicators are shown in Table 4.

We used slaked lime (fluff) with an activity 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.

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 an adhesive cylindrical metal stamp 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 Table. 6, 7. For the experimental study, plates made of cement-sand mortar were used as substrates.

Cement-sand mortar was used as a substrate.

BIBLIOGRAPHY

1. A.s. 544631 Construction putty (MPC C04B 25/04 (1990.01) Application: 2311142. Date of application: 1975.11.25. Published: 1977.01.30. Authors: Pogorelskaya Klara Yakovlevna, Kodochigova Svetlana Petrovna, Kondrashova Nina Vasilievna, Zhidkova Galina Mikhailovna, Okhmanyuk Tamara Ivanovna.

2. SU 1775443 A1 Putty MPK C09D 5/34 С04В 41/62 С04В 28/12 Application 4870327/05,1990.06.05. Patent validity date: 11/1992/15. Publ. 1992.11.15. Bull. 42. Authors Shibaeva Galina Nikolaevna, Plotnikov Eduard Petrovich. The patent holder is the Abakan branch of the Kroyasnoyarsk Polytechnic Institute.

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 lime, filler, reinforcing fiber, microwollastonite, additive, water, contains slaked lime as lime, microcalcite KM2 as filler, cellulose fiber LVJAN ^R Cellulose Fiber TM50 as reinforcing fiber, microwollastonite Mivoll 10 as microwollastonite -97, as an additive – Atren RET G additive in the following ratio of components, wt. %: Slaked lime 15-18 Microcalcite grade KM-2 29.9-34.3 Cellulose fiber LVJIAN ^R Cellulose Fiber TM50 1.5-2.1 Microwollastonite Miwoll 10-97 5.1-6.45 Additive Atren RET G 0.15-0.2 Water 42.3-44