KR20160150224A

KR20160150224A - Cement-polymer modified waterproof coatings and preparation method thereof

Info

Publication number: KR20160150224A
Application number: KR1020150087490A
Authority: KR
Inventors: 오상근; 김수연; 강효진; 박진상; 최은규; 김윤호; 김동범; 허능회; 박완구; 안기원
Original assignee: 서울과학기술대학교 산학협력단
Priority date: 2015-06-19
Filing date: 2015-06-19
Publication date: 2016-12-29
Also published as: KR101793779B1

Abstract

The present invention relates to a polymer based waterproofing material mixed with cement and a construction method using the same, and more specifically, to a polymer based waterproofing material mixed with cement including a component capable of adsorbing behavior acting on a building and a component increasing strength so as to improve bonding performance and strength of the polymer based waterproofing material mixed with cement, and to a construction method using the same. To this end, the polymer based waterproofing material mixed with cement comprises: 25 to 40 wt% of cement; 21 to 23 wt% of acrylic emulsion; 21 to 23 wt% of polymer based synthetic resin; 10 to 12 wt% of polyurea; 2 to 6 wt% of carbon fiber polyether ether ketone (PEEK); 0.5 to 1 wt% of plasticizer; 0.5 to 1 wt% of defoamer; and 5 to 9 wt% of cement binder.

Description

TECHNICAL FIELD [0001] The present invention relates to a cement-incorporated polymer-based waterproofing material and a construction method using the same. BACKGROUND ART [0002]

The present invention relates to a cement-incorporated polymer-based waterproofing material and a construction method using the same, and more particularly, to a cement-incorporated polymer-based waterproofing material comprising a component capable of absorbing a behavior acting on a building and a component for enhancing strength , A cement-incorporated polymer-based waterproofing material that improves adhesion performance and strength of a cement-incorporated polymer-based waterproofing agent, and a construction method using the same.

Generally, the rooftop of a building or other civil structure requires waterproofing of the concrete surface because it may be affected by moisture penetration or water pressure. Such conventional waterproofing materials include inorganic coated cement waterproofing materials, penetrating waterproofing materials, siliceous waterproofing materials, powdered waterproofing materials, liquid type waterproofing materials and asphalt waterproofing materials.

The functional role of waterproofing with waterproofing should not adversely affect the other properties of the concrete while enhancing the waterproofing effect, and should prevent the behavior of the building or microcracks caused by temperature changes and vibrations.

In addition, there is a method in which a liquid type coating film is coated or mixed with a material to which a chemical substance of a heating type, a water-hardening property, or a two-liquid curing type is added.

The above materials (mainly asphalt, normal temperature type asphalt, chloroprene, polyurethane, etc.) exhibit elastic behavior simultaneously with curing and form a smooth surface. These materials are excellent in elasticity and may be used as a function to protect and protect against cracks or joints.

Under the conditions of use and exposure, the elongation of a particular material or system varies depending on the elongation of the material, the thickness of the formed coating, the length of the coating material between the unattached portions of both cracks and gaps.

The above-described waterproof coatings include a method of forming a film having a certain thickness of irregularity through cross-linking of urethane and polyisocyanate in the form of a polymer organic material alone, a method of mixing inorganic and organic cement- The system is composed mainly of cement. The organic system uses various emulsifiers to emulsify the emulsion of water-soluble form in which the liquid phase of the oil phase is emulsified in water or in the liquid phase of the oil phase and the cement particles A method in which a spherical polymer forms a continuous film to form a solid unfavorable coating, and a method in which a liquid or solid form of an asphalt-based (rubber-based asphalt or asphalt) Protects the structure film from moisture and various physical effects .

As described above, a variety of waterproofing agents have been developed and used to protect concrete structures or structures. They have been widely used because they have strong adhesion to concrete, excellent waterproofing and weathering resistance, and have no alkaline chemical reaction Based polymeric cement-based inorganic coating film-containing waterproofing agent.

The polymer cement-based inorganic coating film waterproofing agent may be classified as a waterproofing agent that is close to a coating waterproofing agent but has a water-tight property due to a chemical reaction due to the addition of cement.

The polymeric cement-based inorganic coating waterproofing agent is composed of emulsion polymer of cement-admixing acrylic emulsion polymer, which is a mixture with cement, silica, ceramic mineral and the like, which is a powder component. In order to waterproof the concrete structure by using the above- .

On the other hand, the conventional cement-incorporated polymer-based waterproofing agent is a coating-type waterproofing material having elasticity capable of coping with the behavior of the base surface without being influenced by the size in the external environment, i.e., the wet state.

However, there is a problem that the cement-incorporated polymer-based waterproofing agent applied on the base surface is peeled off and peeled off from the base surface due to the behavior of the building.

Korean Patent Publication No. 890372 (Announced on March 25, 2009) Korean Patent Publication No. 917410 (issued on September 14, 2009) Korean Patent Publication No. 1110704 (Bulletin of Mar. 16, 2012)

It is an object of the present invention to provide a cement-incorporated polymer-based waterproofing material containing a component capable of absorbing a behavior acting on a building and a component for improving the strength, Based polymeric waterproofing material and a method of using the cement-incorporated polymeric waterproofing material to improve adhesion performance and strength of the waterproofing agent.

In order to achieve the above object, the present invention provides a cement composition comprising 25 to 40% by weight of cement; 21 to 23% by weight of an acrylic emulsion; 21 to 23% by weight of polymeric synthetic resin; 10 to 12% by weight of polyurea; 2 to 6% by weight of carbon fiber polyetheretherketone (PEEK); 0.5 to 1% by weight of a plasticizer; 0.5 to 1% by weight of antifoaming agent; And 5 to 9% by weight of a cement binder.

According to the present invention, a base surface cleaning step for removing and cleaning foreign matter on a base surface; A primer applying step of applying a primer having a predetermined thickness to the surface of the substrate laid out through the surface preparation step; A step of forming a plurality of grooves having a certain depth so as to improve adhesion performance of the waterproofing agent on the primer coated surface through the primer application step; And a coating step of applying a cement-incorporated polymer-based waterproofing agent according to claim 1 to a base surface having a plurality of grooves formed through the chipping step.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a cement-incorporated polymer-based waterproofing agent containing a component capable of absorbing the behavior acting on a building and a component for improving the strength, thereby improving the adhesion performance and strength of the cement- .

Hereinafter, preferred embodiments of the present invention will be described.

The cement-incorporated polymeric waterproofing material of the present invention comprises 25 to 40 wt% of cement, 21 to 23 wt% of acrylic emulsion, 21 to 23 wt% of polymer synthetic resin, 10 to 12 wt% of polyurea, 2 to 6% by weight of a ketone (PEEK), 0.5 to 1% by weight of a plasticizer, 0.5 to 1% by weight of an antifoamer and 5 to 9% by weight of a cement binder.

The cement is 25 to 40% by weight, and the powder is made of Portland cement or blast furnace cement of 3,000 cm < 2 > / g.

The acrylic emulsion is 21 to 23% by weight and is generally prepared by mixing water with a surfactant and an acrylic resin copolymer and stirring. The acrylic emulsion has excellent abrasion resistance, weather resistance, crack resistance, impact resistance and strength Is known to be superior.

The polymeric synthetic resin is 21 to 23% by weight, and is a styrene-butadiene dispersion. It is a non-toxic, non-flammable material and acts to increase the adhesive strength and wear resistance and to decrease the water absorption rate.

The polyurea is an elastomer derived from a reaction product of an isocyanate component and a synthetic resin mixed component, which is excellent in elasticity absorbability, thereby enhancing the adhesive force by absorbing the behavior of the building.

The carbon fiber polyether ether ketone (PEEK) is 2 to 6% by weight, and is a fiber reinforced plastic (FRP) made of PEEK as a substrate and a carbon fiber as a reinforcement material. It prevents easy breakage.

The amount of the plasticizer is 0.5 to 1% by weight.

And 0.5 to 1% by weight of the antifoaming agent.

5 to 9% by weight of the above-mentioned cement binder is used for improving curing time, workability and ductility of cement.

The construction method using the cement-incorporated polymer-based waterproofing agent as described above will be described below.

Remove the dirt, dust, sand, gravel, and laitance from the surface by cleaning or other means.

In the primer coating step, a primer having a predetermined thickness is applied to the surface of the base surface prepared through the base surface preparation step so that the adhesion performance of the cement-incorporated polymer-based waterproofing agent is improved.

In the chipping step, when a primer having a predetermined thickness is applied to the base surface through the primer application step, grooves having a predetermined depth are formed in the base surface. This maximizes the contact area between the cement-incorporated polymer-based waterproofing agent applied to the substrate and the substrate, thereby improving the adhesion performance. In this case, the chipping depth is 1 to 2 mm, preferably 1 to 3 per 1 m 2.

When the grooves are formed on the surface of the substrate through the chipping step, the coating step may include 25 to 40 wt% of cement, 21 to 23 wt% of acrylic emulsion, 21 to 23 wt% of polymer synthetic resin, And a cement admixture comprising 5 to 9% by weight of a cement binder and 2 to 6% by weight of a carbon fiber polyetheretherketone (PEEK), 0.5 to 1% by weight of a plasticizer, 0.5 to 1% Apply water repellent to a certain thickness. The coating thickness at this time differs depending on the application area, but is preferably 3 to 10 cm.

It is preferable to have a curing time of 2 to 3 days after applying the cement-incorporated polymer-based waterproofing agent to the base surface.

In the finishing step, when a cement-incorporated polymer-based waterproofing agent having a predetermined thickness is applied to the base surface through the application step, a protective layer having a certain thickness is formed on the top surface thereof. Of course, it is optional in some cases.

In addition, the protective layer interrupts the absorption of ultraviolet rays to delay deterioration of the cement-incorporated polymer-based waterproofing agent.

The above description is only one example for carrying out the cement-incorporated polymeric waterproofing agent and the method of using the same, and the present invention is not limited to the above-mentioned embodiment. It will be understood by those skilled in the art that various changes may be made without departing from the spirit of the invention.

Claims

25 to 40% by weight of cement;
21 to 23% by weight of an acrylic emulsion;
21 to 23% by weight of polymeric synthetic resin;
10 to 12% by weight of polyurea;
2 to 6% by weight of carbon fiber polyetheretherketone (PEEK);
0.5 to 1% by weight of a plasticizer;
0.5 to 1% by weight of antifoaming agent; And
5 to 9% by weight of a cement binder;
Based polymeric waterproofing material.

A base surface cleaning step for removing and cleaning the foreign matter on the surface;
A primer applying step of applying a primer having a predetermined thickness to the surface of the substrate laid out through the surface preparation step;
A step of forming a plurality of grooves having a certain depth so as to improve adhesion performance of the waterproofing agent on the primer coated surface through the primer application step; And
Applying a cement-incorporated polymer-based waterproofing material according to claim 1 to a base surface having a plurality of grooves formed through the chipping step;
Wherein the cement-incorporated polymer-based waterproofing material comprises a cement-based polymer-based waterproofing material.