RU2270823C1 - Building mortar - Google Patents

Abstract

FIELD: manufacture of building materials.

SUBSTANCE: building mortar including Portland cement, sand, foaming agent, and water contains, as foaming agent, protein-containing substance modified with complex modifier M-3 consisting of 0.04% aqueous emulsion of colophony and 0.1% aqueous solution of gelatin using following proportions: 3.6-3.8% of protein-containing substance, 57.6-57.8% of colophony emulsion, and 38.5-38.6% of gelatin solution. Mortar further contains stabilizer, in particular orthosilicic acid (H₄SiO₄) sol with pH 3.1-4.0 and potassium ferricyanide additive. Total composition of mortar is thus as follows, wt %: Portland cement 40.770-42.410, sand 39.621-40.728, modified protein-containing foaming agent 2.311-2.374, orthosilicic acid sol 0.023-0.025, potassium ferrocyanide 0.061-0.063, and water 15.575-16.040. Mortar is suitable for use when mason's and plastering operations are carried out.

EFFECT: reduced mean density of mortar and heat conductivity coefficient, increased mortar stability.

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Description

The invention relates to the field of building materials. It is used as a mortar for stone and plastering.

Known mortar containing sand, cement, gypsum, lime, water (Chekhov A.P. Handbook of concrete and mortar. - Kiev: Budivilnik. 1979, p.230-244).

The disadvantage of this mortar is the increased stratification, reduced water retention and increased value of the coefficient of thermal conductivity.

Known mortar containing a binder, mineral filler, laundry soap and water. The solution contains carboxylmethyl cellulose as a binder, and dolomite dust as a filler in the following ratio of components, wt.%:

- carboxylmethyl cellulose 4-6 - dolomite dust 82-86 - laundry soap 1-3 - water rest

(Aut. St. USSR No. 5447427; From 04 V 25/08; publ. Bull. No. 7 - 02/25/77)

The disadvantage of this mortar is the increased stratification, reduced water retention and increased value of the coefficient of thermal conductivity.

Closest to the claimed mortar is a solution comprising Portland cement, sand, a foaming additive and water in the following ratio of components, wt.%:

- Portland cement 24-28 - Sand represented by molding - waste metallurgical production 56-60 - Foaming additive "QUIN" - based on sodium stearate, C ₁₇ H ₃₅ COONa 8-10 - water 8-10

(RF patent No. 21399841; C 04 B 38/10; Bull. No. 29 dated 10.20.99).

The disadvantage of this mortar is the increased density, the increased value of the coefficient of thermal conductivity and the reduced coefficient of stability of the mortar mixture.

The objective of the invention is the creation of a new mortar, the use of which would allow to achieve a technical result, consisting in reducing the average density of the mortar, reducing the thermal conductivity and increasing the stability of the mortar.

The problem is solved in that the mortar, including Portland cement, sand, a foaming additive, water, as a foaming additive contains a protein-containing additive modified with a complex modifier M-3, consisting of an aqueous emulsion of rosin C = 0.04 wt.% And an aqueous solution gelatin C = 0.1 wt.% in the following ratio of components, wt.%:

- protein supplement 3.6 ... 3.8; - water emulsion of rosin C = 0.04 wt.% 57.6 ... 57.8; - an aqueous solution of gelatin C = 0.1 wt.% 38.5 ... 38.6

and additionally contains a stabilizer represented by sol of orthosilicic acid N ₄ SiO ₄ with a pH of 3.1 ... 4.0 and the addition of potassium iron-sulphide in the following ratio, wt.%:

- Portland cement 40,770-42,410 - sand 39,621-40,728 - Protein-containing foaming agent complex modified additive modifier M-3 2,311-2,374 - Sol orthosilicon acids H ₄ SiO ₄ with a pH of 3.1 ... 4.00, 023-0.025 - Iron-hydrogen potassium K ₄ [Fe (CN) ₆ ] 0,061-0,063 - water 15,574-16,040

A new compared with the known mortar is the combination of the known components of Portland cement, sand, water with a foam-forming protein-containing additive modified with the complex modifier M-3, the composition of which is given above, and stabilized with orthosilicic acid sol H ₄ SiO ₄ with a pH of 3.1 ... 4.0 and the additional use of iron-potassium supplements K ₄ [Fe (CN) ₆ ].

The additional use of iron-hydrogen potassium additive and a protein-containing foam-forming additive, modified and stabilized in combination with the indicated components of the mortar, increases the stability of the foam mixture and ensures the formation of a fine-pore structure of the solution with a pore size not exceeding 1 mm, and also increases the hydration activity of the hardening system with the formation of a large the number of low basic hydrosilicates, which helps to reduce the average density of the solution, as well as lowering the coefficient of thermal conductivity and increasing the stability of the foam mixture.

According to the authors and the applicant, this composition of the mortar is unknown and we can conclude that the invention meets the patentability condition: "novelty."

The claimed invention is industrially applicable and can be used in plastering and stone work.

Below is the information confirming the possibility of carrying out the invention:

An example of a specific implementation of the manufacture of mortar:

I. Preparation of the foaming additive modified with the complex modifier M-3.

1. dose 9% alcohol rosin solution

2. dose water

3. the metered components are mixed, obtaining a rosin emulsion with C = 0.04 wt.%

4. dose gelatin

5. dispense warm water with t = 40 ° C

6. the metered components are mixed, obtaining a gelatin solution with C = 0.1 wt.%

7. -dose rosin solution C = 0.04 wt.%

- dosed gelatin solution C = 0.1 wt.%

8. Metered dose solutions of rosin and gelatin are mixed until a homogeneous mixture is obtained, which is a complex modifier M-3

9. dose a protein-containing supplement

10. dose the complex modifier M-3

11. mix the metered components according to claim 9 and 10, obtaining a solution of a foaming additive modified with the complex modifier M-3.

II. Preparation of a stabilizer for the foaming additive represented by orthosilicic acid sol H ₄ SiO ₄ .

1. A solution of sodium liquid glass Na ₂ SiO ₃ with ρ = 1.46 is diluted with water in the ratio of Na ₂ SiO ₃ : H ₂ O = 1: 20.

2. The resulting liquid glass solution is passed through a cation exchange column to obtain an orthosilicic acid sol H ₄ SiO ₄ with a pH of 3.1 ... 4.0.

3. I am dosing a sol of orthosilicic acid.

III. Mix the metered modified foaming additive with the metered-dose orthosilicic acid sol until a homogeneous mass is obtained.

IV. Mortar preparation

1. Dose water

2. Dosage of iron-ferrous potassium, which is dissolved in dosed water.

3. Dose Portland cement

4. Dose sand

5. Dosage components according to Clause 1.2.3.4 are placed in a concrete mixer and mixed thoroughly. To the resulting cement-sand mortar is added the foam obtained using a foam generator from a modified and stabilized foam-forming additive. All components are thoroughly mixed in a concrete mixer, receiving a mortar, which is used for laying effective bricks and samples are simultaneously made for quality control.

The obtained research results are presented in the table. Analysis of the results shows that the mortar according to this invention, compared with the prototype, is characterized by an improvement in the following quality parameters: the average density decreases by 15%, the thermal conductivity decreases by 25%, the stability of the mortar increases by 13%.

Stability is determined by the formula:

C = ρ ₀ / ρ ₁ · 100%, where

ρ ₀ - density of the mortar mixture at the time of preparation, kg / m ³

ρ ₁ - density of the mortar mixture 1 hour after preparation, kg / m ³

Claims (1)

Mortar, including Portland cement, sand, a foaming additive and water, characterized in that as a foaming additive contains a protein-containing additive modified with a complex modifier M-3, consisting of an aqueous emulsion of rosin C = 0.04 wt.% And an aqueous solution of gelatin C = 0.1 wt.%, In the following ratio of components, wt.%: Protein-containing supplement 3.6 ... 3.8 Aqueous emulsion of rosin C = 0.04 wt.% 57.6 ... 57.8 An aqueous solution of gelatin C = 0.1 wt.% 38.5 ... 38.6 and additionally contains a stabilizer represented by orthosilicic acid sol H ₄ SiO ₄ with a pH of 3.1 ... 4.0 and the addition of potassium iron-sulphide in the following ratio, wt.%: Portland cement 40,770-42,410 Sand 39,621-40,728 Protein-containing foaming agent complex modified additive modifier M-3 2,311-2,374 Orthosilicic acid sol H ₄ SiO ₄ with pH 3.1 ... 4.00 0.023-0.025 Iron-hydrogen potassium K ₄ [Fe (CN) ₆ ] 0,061-0,063 Water 15,574-16,040