KR20000049586A - Waterproof agent for bridges - Google Patents

Abstract

PURPOSE: A coat for waterproofing a bridge floor is provided which exhibits good waterproofness and has excellent in constructive property and adhesive property with asphalt. CONSTITUTION: A coat for waterproofing a bridge floor comprises: (a) a first coating on a bridge floor a blend prepared by dissolving N,N,N,N-tetrakis(2-hydroxypropyl)ethylene diamine in an aromatic solvent having high boiling point as a main material; dissolving methane 4,4'-diisocyanate(MDI) that is a hardening agent commonly used in the aromatic solvent having high boiling point, in the same solvent; and blending the two mixtures in the ratio of 1:1, and (b) a second coating on the bridge floor a blend prepared by mixing a polypropylene glycol, triisopropanol amine, 1,4-butadiol and an aromatic oil as a main material; dissolving the same hardening agent(MDI) in the same aromatic oil; and blending the two mixtures in the ratio of 1:1.

Description

Waterproofing agent for bridges

The present invention relates to a waterproof coating of bridge decks (bridges), and more particularly, to repair bridges and chaebol bridge decks for repairing new bridges after repairing bridge leaks or cracks.

In general, in the case of newly constructed bridge tops after various repair works to maintain the leaked or cracked areas of the bridge, only some adhesive and waterproof asphalt is used as an asphalt emulsion (adhesive liquid asphalt). As the bridge deck is paved, the waterproofness is not perfect, and when water reaches into the cement concrete layer that forms the bridge due to moisture seeping through the asphalt, the concrete layer easily cracks, crushes, and breaks down. .

The present invention improves the weakness of the repair and the waterproofing agent for the maintenance of the conventional bridges as described above to provide a waterproof coating for bridge top plate that can be completely repaired regardless of the repaired bridge or newly constructed bridge. If this is described in detail with an example as a coser as follows.

50 to 60 wt% of high boiling aromatic solvent, 40 to 50 wt% of N, N, N, N-tetrakis (2-hydroxypropyl) ethylenediamine, mixed with an appropriate amount of conventional curing accelerators and pigments, are mainly used. The mixture of 50 to 70 wt% of methane 4,4 'diisocyanate (MDI), which is a curing agent commonly used in 30 to 50 wt% of the same high boiling point aromatic solvent, is prepared by mixing a 1: 1 mixture with the main material, Hardening accelerators and pigments commonly used in mixtures of ethylene oxide-containing polypropylene glycol 60 to 80 wt%, triisopropanolamine 5 to 15 wt%, 1.4-butyldiol 2 to 8 wt%, and aromatic oils (new oil) 12 to 20 wt% It is a conglomerate which mixes the hardener mixture which mixes the appropriate amount in the ratio of 1: 1 with the said main body and 30-50 wt% of the same aromatic oils and MDI40-80 wt% which is the same hardening | curing agent as used for the above first painting. It is painted.

In the above, the high boiling point aromatic solvent is any one selected from toluene, ethylbenzene, cylene or a mixture thereof, ethylene glycol, perchloroethylene having a boiling point of 110 to 220 ℃, evaporation rate of 0.06 to 1.8, specific gravity 0.85 to 0.90. do.

In the above description, the aromatic oil (extension oil) has a specific gravity of 0.98 to 1.02 at 15.6 ° C, an average molecular weight of 230 to 350, and a viscosity of 5 to 36 at 100 ° C.

The bridge top waterproofing coating of the present invention constituted as described above is primarily waterproofed by first applying to a repaired or newly constructed bridge top. After coating as the first coating, the chaebol coating is spray-coated and dried, and then the chaebol coating is spray coated again. While spraying the silica sand to form a three-layer coating layer, as a perfect waterproof, the specific method of using the first coating and the chaebol is described in detail in the cross-section waterproofing method filed with the present invention.

The use of a high boiling point solvent in the primary coating of the bridge deck waterproofing coating of the present invention is a solvent and viscosity control agent of N, N, N, N-tetrakiss (2-hydroxypropyl) ethylenediamine used herein, and strong in cement. It is to penetrate deeply into the cemented bridge deck using the penetrating power to obtain the perfect waterproof effect. The use of N, N, N, N-tetrakiss (2-hydroxypropyl) ethylenediamine is made of cement. It is to obtain a waterproof effect by the strong adhesion and penetration force with the bridge deck, the curing accelerator is to promote the curing of the primary coating by the curing agent MDI.

The use of ethylene oxide-containing polypropylene glycol in chaebol lacquer coating of the present invention is to keep the waterproof membrane strong without cracking due to the soft, elastic and tough waterproof layer and triisopropanolamine waterproof. To harden the seven layers and harden the film easily to harden to form the waterproofing layer in a short time, 1.4-butyldiol is to strengthen the waterproofing layer more, aromatic oil is the adhesion between asphalt and silica sand and waterproofing layer Is to promote.

Claims (5)

Waterproofing coating for bridge deck consisting of priming paint that is applied directly to the bridge deck that has repaired leaks or cracks or newly installed, and re-lamination on the same. The method of claim 1, wherein the primary coating is a suitable amount of the curing accelerator and pigment suitable for a large amount of 40 ~ 50wt% of N, N, N, N-tetrakis (2-hydroxypropyl) ethylenediamine in 50-60wt% of high boiling aromatic solvent The curing agent mixture was prepared by dissolving 50 to 70 wt% of methane 4,4 'diisocyanate (MDI), which is a curing agent commonly used in the same high boiling aromatic solvent as the above. Water-resistant coating for bridge decks, characterized by mixing at a ratio of 1: 1. The high boiling point aromatic solvent according to claim 2, wherein the high boiling point aromatic solvent has a boiling point of 110 to 220 ° C, an evaporation rate of 0.06 to 1.8, a specific gravity of 0.85 to 0.90, and any one selected from toluene, ethylbenzene, xylene or a mixture thereof, ethylene glycol, and perchloroethylene. Bridge top waterproofing, characterized in that one. According to claim 1, The chaebol lacquer is 60 ~ 80wt% ethylene oxide containing polypropylene glycol, 5wt% ~ 15wt% triiso propanolamine, 2wt% ~ 8wt% 1.4-butyldiol, 12 ~ aromatic oil 40 to 80 wt% of methane 4,4 'isocyanate (MDI) tolerant to 30 to 50 wt% of the same aromatic oil (new oil) as the predominant mixture of a curing accelerator and a pigment suitable for a 20 wt% mixture The bridge top waterproofing conglomerate, characterized in that consisting of a mixture of the curing agent mixture in a ratio of 1: 1 with the main material. The method of claim 4 wherein the aromatic oil (extension oil) has a specific gravity of 0.98 ~ 1.02 at 15.6 ℃, the average molecular weight is 230 ~ 350, the viscosity is 100 ~ 5 ℃ at the temperature of the bridge deck characterized in that 5 ~ 36 .