RU2724838C1 - Waterproofing compound for protection of concrete structures - Google Patents

Abstract

FIELD: construction.SUBSTANCE: invention relates to construction, in particular to compositions for waterproofing surfaces of underground and ground parts of structures, buildings and structures with high cracking, subjected to settling and vibrations, prefabricated structures subjected to deformations, concrete structures, buildings and constructions subject to dynamic loads and high hydraulic pressure. Waterproofing composition for protection of concrete structures contains, wt. %: portland cement PPC 500D0N 20–25; alumina cement of grade GC-40 3–10; sand of quartz brand PB-150 40–60; Peshelansky gypsum G-16 1–2; microcalcite mineral filler 1–2; polymer additive in form of redispersible powder Vinnapas 7055E 5–25; powdered anti-foaming agent Vinapor 9010F 0.4–0.6; superplasticiser Melment F-10 0.1–0.2; polymer Mecellose FMC2070 0.1–0.2; modifying additive 0–3. Modifying additive used can be tartaric acid in amount of 0–0.02 wt. %, or polymer additive in form of re-dispersible powder Vinnapas 4042H in amount of 0–2 wt. %, or cellulose binder Technocel 1004-7N in amount of 0–3 wt. %.EFFECT: technical result is high adhesion strength of waterproofing composition with concrete base, water-resistance, crack resistance, corrosion resistance of concrete and reinforced concrete structures to liquid and gaseous aggressive media, frost resistance of protected structures, longer durability of structures.5 cl, 4 ex

Description

The invention relates to the field of construction, in particular to compositions for waterproofing the surfaces of underground and ground parts of structures, buildings and structures with increased crack formation, subject to draft and vibration, prefabricated structures subjected to deformations, concrete structures, buildings and structures subject to dynamic loads and high hydraulic pressure .

Known waterproofing compounds for the protection and restoration of concrete structures of buildings.

Known waterproofing polymer-cement mixture, including Portland cement, polymer and quartz sand, while it contains as a polymer a triple copolymer of ethylene, vinylaurate and vinyl chloride and additionally sodium bentonite, lignosulfonate, methylhydroxyethyl cellulose, sodium carboxymethyl cellulose and hydroxymethyl hydroxymethyl polymer. %: Portland cement 25-30, sodium bentonite 25-30, lignosulfonate 0.2-0.5, triple copolymer of ethylene, vinylaurate and vinyl chloride 8-10, methyl hydroxyethyl cellulose 5-8, sodium carboxymethyl cellulose 6-8, hydroxypropyl starch 4-5, quartz sand 22-25. (RF patent No. 2193634, IPC Е04В 1/62, publ. 11/27/2002)

A disadvantage of the known composition is that the composition has a low elasticity and after several cycles of "soaking-drying", "freezing-thawing" loses elasticity and embrittlement. The above composition is also characterized by low corrosion resistance to liquid and gaseous chloride, carbon dioxide and sulfate environments. In addition, the above composition has insufficient adhesion strength (adhesion) of the material with a concrete base. ⋅ ...

Known waterproofing composition for the protection of concrete and stone structures, including Portland cement, sodium silicate in the form of a powdery silicate block, quartz sand, superplasticizer in the form of polycarboxylate, silica fume and cellulose ether. At the same time, Portland cement of a class of at least B 32.5 N, silica fume, sodium silicate in the form of a powdery silicate block with a specific surface of at least 4500 cm ² / g, quartz sand with a particle size of 0.16-0.63 mm, polycarboxylate, ether cellulose in the following ratio, wt. %: said Portland cement 63, said silica fume 6.8, said silica sand 25.1, said sodium silicate 4.7, polycarboxylate 0.23, cellulose ether 0.17. (RF patent No. 2511198, IPC С04В 41/65, publ. 04/10/2014 - prototype)

A disadvantage of the known waterproofing composition is low crack resistance, which does not allow the composition to be used in buildings and structures subject to deformations and alternating dynamic loads.

The technical problem to be solved by the claimed invention is directed, is the creation of a new composition, which allows to increase the reliability of waterproofing when conducting work to protect and restore concrete structures.

The stated technical problem is solved in that the waterproofing composition for protecting concrete structures, including Portland cement, quartz sand and polymer, according to the claimed invention, contains Portland cement grade ПЦ 500Д0Н, alumina cement grade ГЦ-40, quartz sand grade ПБ-150, gypsum plaster grade П -16, mineral filler Microcalcite, polymer additive in the form of Vinnapas7055E redispersible powder, Vinapor 9010F antifoam powder, Melment F-10 superplasticizer, Mecellose FMC2070 polymer, modifying additive, while the ratio of components is, wt.%:

Portland cement grade ПЦ 500Д0Н 20-25 HZ-40 alumina cement 3-10 Sand quartz PB-150 brands 40-60 Plaster of Peschelansky brand G-16 1-2 Mineral filler Microcalcite 1-2 Redispersible polymer additive Vinnapas7055E Powder 5-25 Vinapor9010F powder defoamer 0.4-0.6 Superplasticizer Melment F-10 0.1-0.2 Polymer Mecellose FMC2070 0.1-0.2 Modifying additive 0-3

In addition, as a modifying additive choose a modifying additive from the group: tartaric acid, a polymer additive in the form of a redispersible powder Vinnapas4042H, cellulosic binder Technocel 1004-7N.

In addition, as part of the modifying additives are used in the following ratio to the components of the composition, wt.%:

Wine acid 0-0.02 redispersible polymer additive Vinnapas4042H Powder 0-2 cellulosic binder Technocel 1004-7N 0-3

The technical result, which is achieved through the implementation of the totality of the essential features of the claimed invention, manifests itself during the operation of the composition during the work on the protection and restoration of concrete structures and consists in the adhesive strength of adhesion of the waterproofing composition to the concrete base, water tightness, crack resistance, which increases the reliability of waterproofing .

The applicant did not identify open sources containing information about waterproofing compounds of the same purpose, identical to the claimed composition.

The inventive waterproofing composition contains Portland cement, alumina cement, quartz sand, gypsum binder, mineral filler, plasticizer, polymer, water-retaining and modifying additives.

The components of the waterproofing composition HYDRO-PRO ELASTIC 1K are known and are included in the following ratio of components, wt.%:

Portland cement grade ПЦ 500Д0Н 20-25 HZ-40 alumina cement 3-10 Sand quartz PB-150 brands 40-60 Plaster of Peschelansky brand G-16 1-2 Mineral filler Microcalcite 1-2 Redispersible polymer additive Vinnapas7055E Powder 5-25 Vinapor9010F powder defoamer 0.4-0.6 Superplasticizer Melment F-10 0.1-0.2 Mecellose FMC2070 0.1-0.2 Modifying additive 0-3

Moreover, the modifying additive is selected from the group: tartaric acid, a polymer additive in the form of a redispersible powder Vinnapas4042H, cellulosic binder Technocel 1004-7N

Moreover, in the inventive composition they are used in the following ratio to the components of the composition:

Wine acid 0-0.02 redispersible polymer additive Vinnapas4042H Powder 0-2 cellulosic binder Technocel 1004-7N 0-3

All components are taken at the optimal values of their values.

Cement ПЦ 500Д0Н is a Portland cement without mineral additives, it is produced on the basis of clinker of normalized composition with a limited content of tricalcium aluminate, due to which it is widely used for the production of high-strength concrete for road and airfield coatings, hydraulic structures, bridge structures, as well as prefabricated reinforced concrete elements.

GZ-40 alumina cement has high viscosity and strength due to the presence of calcium aluminates in the substance. Alumina cement is characterized by high resistance to aggressive environments, including aggressive gaseous substances and liquids. It retains its properties and structure in contact with chloride, carbon dioxide and other waters due to the waterproof composition. In the process of hardening, the formation of calcium hydroaluminates and the release of aluminum hydroxide. This leads to an increase in frost resistance, and, most importantly, sulfate resistance. The use of alumina cement in the inventive composition increases the adhesion rate of the composition to the monolith of the protected or repaired structure, positively affecting the durability of the structures.

Plaster gypsum grade G-16 is a powder of medium grinding, which is made from gypsum stone, in the mixture performs the function of a binder. This fast-setting and quick-hardening substance, which is widely used in construction, includes environmental friendliness, fire resistance, high soundproofing properties, and also acts as a moisture stabilizer in the composition.

Microcalcite is a natural inorganic mineral filler, which is obtained by grinding and fractioning white marble, a white powder. Also known as marble flour. It is added to the mixture to improve technical characteristics; in the mixture it functions as a mineral filler with a calcium carbonate content of up to 98% in it. The addition of microcalcite to the waterproofing composition gives it additional moisture resistance and durability.

Vinnapas 7055E is a water dispersible dispersible powder of vinyl acetate terpolymer, vinyl ester and ethylene. The high ethylene content gives it softness and ductility even at low temperatures. The use of Vinnapas7055E in a waterproofing composition improves adhesion / adhesion to all types of substrates even at low temperatures, tensile and bending strength, ductility, abrasion resistance and workability of its modified composition, without significantly affecting spreading or water retention capacity. Manufactured by Wacker Polimer Sistems GmbH & Co.KG (Wacker-Chemie GmbH).

Vinnapas 4042H is a water-dispersible dispersion powder of a copolymer of vinyl acetate and ethylene, which is highly resistant to saponification. Due to its high ethylene content, this polymer is soft and flexible. VINNAPAS 4042H improves adhesion / adhesion, flexural and tensile strength, ductility, abrasion resistance and workability of the compositions improved by it, without significantly affecting their flowability, thixotropy or water retention capacity. Manufactured by Wacker Polimer Sistems GmbH & Co.KG (Wacker-Chemie GmbH).

Vinapor 9010F is an antifoam powder based on derivatives of fatty alcohols and polysiloxanes on an inorganic carrier. It is an effective antifoam agent, when used as part of a waterproofing mixture it allows you to control the air content in the prepared solution and provides a smooth high-quality surface, improves the quality of fresh solutions in terms of reducing the content of foam and air (antifoam).

Melment F-10 - is a superplasticizer based on sulfonated melamine formaldehyde, obtained by spray drying. In a waterproofing mixture based on cement and gypsum, it is used to plasticize and reduce water consumption for the mixture, increases the mobility and fluidity of the mixture and significantly improves its physical and technological properties.

Mecellose FMC2070 is a water-soluble polymer based on cellulose ethers (methyl cellulose) in the form of fine hydroxypropyl cellulose. In the waterproofing composition is used as a water-retaining additive.

Tartaric acid is a colorless or white odorless fine powder, is a modifying additive that performs the function of slowing the setting of the waterproofing composition.

Technocel 1004-7N is a 400 μm long cellulose fiber with a cellulose content of 80%, which are used in the composition of the waterproofing mixture as a reinforcing component to increase crack resistance by optimizing the fractional composition and increasing tensile strength, increasing frost resistance. Application of Technocel 1004-7N prevents the cracking of the coating, which appears after application to the concrete surface.

The implementation of the claimed combination of essential features of the waterproofing composition allows to achieve the claimed technical result. The adhesion strength (adhesion) of the claimed composition meets the requirements of paragraph 3.4. GOST 26589-94.

To prepare the inventive waterproofing composition for the protection and restoration of concrete structures (HYDRO-PRO ELASTIC 1K), dry components of the mixture are poured into the container in the indicated proportions and mixed until a homogeneous mass is obtained. The result is a one-component mixture. The combined use of Portland cement grade 500D0N, alumina cement HZ-40, quartz sand PB-150, Peschelanskaya gypsum (G-16) and microcalcite increases the adhesion of the composition and allows the composition to be used under negative water pressure.

To use the inventive waterproofing composition HYDRO-PRO ELASTIC 1K, water is added to it and mixed until a homogeneous mass is obtained. The resulting solution covers concrete surfaces, having previously cleaned them with clean water. After the surface has completely dried from water, the solution is applied using a brush with a short stiff bristle, spatula or roller with a layer thickness of 1.0 mm. It is preferable to apply in two layers with a total coating thickness of at least 3 mm. The polymerization time of each layer is 2-6 hours, depending on temperature and humidity. After hardening, a waterproofing layer forms on the surface. The result is reliable protection of the coated surface from moisture, which increases the strength and durability of building structures.

Below are examples of the implementation of the inventive waterproofing composition HYDRO-PRO ELASTIC 1K.

Example 1

To prepare 1 kg of the inventive waterproofing composition for the protection and restoration of concrete structures (HYDRO-PRO ELASTIC 1K), dry components of a mixture of 0.25 kg of Portland cement grade ПЦ 500Д0Н, 0.03 kg of alumina cement grade ГЦ-40, 0.4414 kg are poured into the container sand of quartz grade ПБ-150, 0.01 kg of gypsum of Peshelan grade G-16, 0.01 kg of mineral filler of microcalcite, 0.25 kg of a polymer additive in the form of redispersible powder Vinnapas7055E, 0.0054 kg of powder antifoam Vinapor9010F, 0.002 kg of superplasticizer Melment F- 10, 0.001 kg of Mecellose FMC2070 polymer, 0.0002 kg of tartaric acid. After mixing, a homogeneous mass is obtained. This completes the process of preparing the mixture.

The ratio of ingredients in the finished waterproofing composition was, wt. %:

Portland cement brand PTs 500DON 25% HZ-40 alumina cement 3.0% Sand quartz PB-150 brands 44.14% Plaster of Peschelansky brand G-16 1,0% Mineral filler Microcalcite 1,0% Redispersible polymer additive Vinnapas7055E Powder 25% Vinapor9010F powder defoamer 0.54% Superplasticizer Melment F-10 0.2% Polymer Mecellose FMC2070 0.1% Wine acid 0.02% Total: one hundred%

Example 2

To prepare 1 kg of the inventive waterproofing composition for the protection and restoration of concrete structures (HYDRO-PRO ELASTIC 1K), dry components of a mixture of 0.25 kg of Portland cement grade ПЦ 500Д0Н, 0.1 kg of alumina cement grade ГЦ-40, 0.433 kg of quartz sand are poured into the container PB-150 grade, 0.02 kg of gypsum of the Peschelanskoy grade G-16, 0.02 kg of microcalcite mineral filler, 0.15 kg of a polymer additive in the form of Vinnapas7055E redispersible powder, 0.004 kg of Vinapor9010F antifoam powder, 0.002 kg of Melment F-10 superplasticizer, 0.001 kg Mecellose FMC2070 polymer, 0.02 kg of a polymer additive in the form of a Vinnapas 4042H redispersible powder. After mixing, a homogeneous mass is obtained. This completes the process of preparing the mixture.

The ratio of ingredients in the finished waterproofing composition was, wt. %:

Portland cement grade ПЦ 500Д0Н 25% HZ-40 alumina cement 10.0% Sand quartz PB-150 brands 43.3% Plaster of Peschelansky brand G-16 2.0% Mineral filler Microcalcite 2.0% Redispersible polymer additive Vinnapas7055E Powder 15% Vinapor9010F powder defoamer 0.4% Superplasticizer Melment F-10 0.2% Polymer Mecellose FMC2070 0.1% Redispersible polymer additive Vinnapas 4042H powder 0.2% Total: one hundred%

Example 3

To prepare 1 kg of the inventive waterproofing composition for the protection and restoration of concrete structures (HYDRO-PRO ELASTIC 1K), dry components of a mixture of 0.25 kg of Portland cement grade ПЦ 500Д0Н, 0.1 kg of clay-cement cement grade ГЦ-40, 0.4724 kg are poured into the container sand of quartz grade ПБ-150, 0.02 kg of gypsum of Peshelan grade G-16, 0.02 kg of mineral filler of microcalcite, 0.12 kg of polymer additive in the form of redispersible powder Vinnapas7055E, 0.0046 kg of powder antifoam Vinapor 9010F, 0.002 kg of superplasticizer Melment F -10, 0.001 kg of Mecellose FMC2070 polymer, 0.03 kg of Technocel 1004-7N cellulose binder. After mixing, a homogeneous mass is obtained. This completes the process of preparing the mixture.

The ratio of ingredients in the finished waterproofing composition was, wt. %:

Portland cement brand PTs 500DON 25% HZ-40 alumina cement 10.0% Sand quartz PB-150 brands 47.24% Plaster of Peschelansky brand G-16 2.0% Mineral filler Microcalcite 2.0% Redispersible polymer additive Vinnapas7055E Powder 12% Vinapor9010F powder defoamer 0.46% Superplasticizer Melment F-10 0.2% Polymer Mecellose FMC2070 0.1% Cellulosic binder Technocel 1004-7N 0.3% Total: one hundred%

Example 4

To prepare 1 kg of the inventive waterproofing composition for the protection and restoration of concrete structures (HYDRO-PRO ELASTIC 1K), dry components of a mixture of 0.25 kg of Portland cement grade ПЦ 500Д0Н, 0.1 kg of clay-cement cement grade ГЦ-40, 0.513 kg of quartz sand are poured into the container PB-150 grades, 0.02 kg of gypsum of Peschelansky grade G-16, 0.02 kg of microcalcite mineral filler, 0.07 kg of polymer additive in the form of Vinnapas7055E redispersible powder, 0.004 kg of Vinapor 9010F antifoam powder, 0.002 kg of Melment F-10 superplasticizer, 0.001 kg of polymer Mecellose FMC2070, 0.02 kg of polymer additives in the form of redispersible powder Vinnapas 4042H. After mixing, a homogeneous mass is obtained. This completes the process of preparing the mixture.

The ratio of ingredients in the finished waterproofing composition was, wt. %:

Portland cement brand PTs 500DON 25% HZ-40 alumina cement 10.0% Sand quartz PB-150 brands 51.3% Plaster of Peschelansky brand G-16 2.0% Mineral filler Microcalcite 2.0% Redispersible polymer additive Vinnapas7055E Powder 7.0% Vinapor9010F powder defoamer 0.4% Superplasticizer Melment F-10 0.2% Polymer Mecellose FMC2070 0.1% Redispersible polymer additive Vinnapas 4042H powder 0.2% Total: one hundred%

The inventive waterproofing composition meets the requirements of GOST 31357 "Dry building mixes on a cement binder. General technical conditions ”in terms of clauses 1-7, 8.1 (ST RK 1168-2006 “Dry mixes for building. Technical conditions”), GOST R 56703-2015 “Dry mixes for building waterproofing penetrating capillary on cement binder”.

Laboratory tests were carried out on samples of the inventive waterproofing composition for compliance with the requirements of TU5745-001-61983264-2019. Test report No. 3627-ITLVR / 19 of 02.25.2019 is attached.

The use of the claimed invention improves the adhesive strength of the waterproofing composition with the concrete base, water resistance, crack resistance and corrosion resistance of concrete and reinforced concrete structures to liquid and gaseous aggressive environments, including those operating in a marine environment, frost resistance of protected structures, and as a result - increased durability designs.

The inventive waterproofing composition "HYDRO-PRO ELASTIC 1K" can be used for waterproofing horizontal and vertical surfaces of underground and ground parts of structures, buildings and structures with increased crack formation, subject to draft and vibration, prefabricated structures subjected to deformation (temperature and mechanical), concrete structures , buildings and structures subject to dynamic loads and high hydraulic pressure. It can also be used for chemical protection of concrete (reinforced concrete), metal structures from the effects of groundwater, wastewater, sea water, oil products and highly aggressive environments, as well as carbonization and anti-icing salts, waterproofing devices for flat and sloping concrete roofs of buildings and structures.

Claims (6)

1. Waterproofing composition for the protection of concrete structures, including Portland cement, quartz sand and polymer, characterized in that the composition contains Portland cement grade ПЦ 500Д0Н, quartz sand grade ПБ-150, a polymer additive in the form of redispersible powder Vinnapas 7055E, Mecellose FMC2070 polymer and additionally - GZ-40 alumina cement, G-16 grade Peschelansky gypsum, Microcalcite mineral filler, Vinapor 9010F powder antifoam, Melment F-10 superplasticizer, modifying additive, while the ratio of components is, wt.%: Portland cement grade ПЦ 500Д0Н 20-25 Alumina cement grade GTs-40 3-10 Sand quartz PB-150 brands 40-60 Plaster of Peschelansky brand G-16 1-2 Mineral filler Microcalcite 1-2 Redispersible polymer additive Vinnapas 7055E Powder 5-25 Vinapor 9010F powder defoamer 0.4-0.6 Superplasticizer Melment F-10 0.1-0.2 Polymer Mecellose FMC2070 0.1-0.2 Modifying additive 0-3 2. The waterproofing composition according to claim 1, characterized in that as a modifying additive, a modifying additive is selected from the group: tartaric acid, a polymer additive in the form of a Vinnapas4042H redispersible powder, and Technocel 1004-7N cellulose binder. 3. The waterproofing composition according to claim 1, characterized in that the tartaric acid modifying additive is used in the composition in an amount of 0-0.02 wt.%. 4. The waterproofing composition according to claim 1, characterized in that the modifying additive in the form of a redispersible powder Vinnapas 4042H is used in the composition in an amount of 0-2 wt.%. 5. The waterproofing composition according to claim 1, characterized in that the modifying additive in the form of a cellulosic binder Technocel 1004-7N is used in the composition in an amount of 0-3 wt.%.