JP2013217028A - Waterproof finish structure and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproof finish structure and method, capable of preventing a fiber-reinforced unsaturated polyester resin layer from swelling due to moisture contained in a substrate concrete, causing no damage due to fatigue of a specific layer.SOLUTION: A waterproof finish structure and method includes: a cured layer of aqueous epoxy resin cement composition applied on a substrate concrete; a cured layer of coating composition formed of aqueous epoxy resin mortar composition including a specific hydraulic cement, aggregates, and an aqueous epoxy resin with an application amount of 0.8 to 2.0 kg/m; a cured layer of an urethane resin cement composition applied thereon formed of an urethane resin and a hydraulic cement; and a fiber-reinforced unsaturated polyester resin layer further formed thereon.

Description

  The present invention relates to a waterproof finishing structure and a waterproof finishing method formed on new or existing concrete such as a floor of a building, a parking lot, a roof, and the like, and in particular, from a specific aqueous epoxy resin mortar composition on an underlying concrete. The present invention relates to a waterproof finishing structure and a waterproof finishing method in which an unsaturated polyester resin fiber reinforced resin layer is formed as a finishing layer after forming a so-called base conditioning material layer.

  Conventionally, for waterproofing to be applied to new or existing concrete such as rooftops, floors, parking lots, etc., a waterproof sheet method using a waterproof sheet, a waterproof coating method that forms a waterproof coating layer by applying resin, An FRP waterproofing method in which a resin and a fiber reinforcing material are combined is performed. In such a waterproof construction method, if the foundation concrete is not sufficiently dry, the waterproof layer swells due to the vapor pressure or osmotic pressure of moisture contained in the foundation concrete and peels off, detracting from the aesthetic appearance, and the swelled portion. There was a problem that water leakage would occur if the waterproof layer of the battery was damaged.

  In order to solve such a problem, an unsaturation in which a breathable sheet body in which a non-breathable layer is laminated on at least one side of a fibrous base material is disposed on the surface of the substrate and is applied to a partial surface of the breathable sheet body A polyester resin fiber reinforced resin layer, a fixture driven into the substrate from the unsaturated polyester resin fiber reinforced resin layer, and at least a surface portion of the breathable sheet body where the unsaturated polyester resin fiber reinforced resin layer was not previously applied And a waterproof finishing structure characterized by being finished from an unsaturated polyester resin fiber reinforced resin layer formed so as to cover the fixture (Patent Document 1).

Japanese Patent No. 40663323

  However, in the waterproof finish structure shown in Patent Document 1, an air permeable sheet body is disposed on a base that is a base concrete, and an unsaturated polyester resin fiber reinforced resin layer is formed on a part of the surface of the air permeable sheet body. Since the fixing tool is driven into the base from the unsaturated polyester resin fiber reinforced resin layer and the whole is finished with the unsaturated polyester resin fiber reinforced resin layer, a breathable sheet other than the part integrated with the base with the fixing tool The part is basically arranged only on the base body and not integrated, and a pipe cargo or the like on which a small-diameter wheel forklift or a small-diameter caster is run with high load on the waterproof finish structure. In this case, the shearing force due to the turning of the wheel is applied to the breathable sheet and the base part, and the part is fatigued, or the breathable sheet itself is fatigued. There is a problem in that if there is water finishing structure is damaged.

  The problem to be solved by the present invention is to prevent swelling of the unsaturated polyester resin fiber reinforced resin layer due to moisture contained in the base concrete without using a breathable sheet, and to apply high load on the waterproof finish structure. To provide a waterproof finishing structure and a waterproof finishing method in which a waterproof structure does not fatigue and break at a specific layer even when a pipe cargo with a small-diameter wheel forklift or a small-diameter caster is running It is in.

The invention according to claim 1 includes a layer obtained by applying and curing a water-based epoxy resin cement composition comprising a water-based epoxy resin and a hydraulic cement on the foundation concrete, a hydraulic cement, an aggregate, and a water-based epoxy resin. A water-based epoxy resin mortar composition having a weight ratio of hydraulic cement to water of 0.3 to 0.4, and a resin obtained by adding a curing agent that reacts with the epoxy resin to the epoxy resin. The resin solid content weight of the resin is 4% or more and 10% or less with respect to the weight of the total formulation including water, the total pore amount of the cured product is 0.05 cc / g or more and 0.2 cc / g or less, Urethane resin cement comprising a layer obtained by applying and curing 0.8 to 2.0 kg / m ² of a coating material composition having an I value of 1.0 to 1.5, and a urethane resin and a hydraulic cement thereon. A waterproof finish structure comprising: a layer coated with a composition and cured; and an unsaturated polyester resin fiber reinforced resin layer formed thereon.

The invention according to claim 2 includes applying a water-based epoxy resin cement composition composed of a water-based epoxy resin and a hydraulic cement on the base concrete and curing, and further including the hydraulic cement, the aggregate and the water-based epoxy resin. A water-based epoxy resin mortar composition having a weight ratio of hydraulic cement to water of 0.3 to 0.4, and a resin obtained by adding a curing agent that reacts with the epoxy resin to the epoxy resin. The resin solid content weight of the resin is 4% or more and 10% or less with respect to the weight of the total formulation including water, the total pore amount of the cured product is 0.05 cc / g or more and 0.2 cc / g or less, A coating material composition having an I value of 1.0 to 1.5 is applied and cured at 0.8 to 2.0 kg / m ² , and a urethane resin cement composition comprising a urethane resin and a hydraulic cement is formed thereon. It is a waterproof finishing method characterized by applying and curing, and further forming an unsaturated polyester resin fiber reinforced resin layer thereon.

  The waterproof finishing structure and the waterproof finishing method according to the present invention do not cause swelling in the unsaturated polyester resin fiber reinforced resin layer due to moisture contained in the ground concrete, and all layers are integrated. The waterproof finish structure is fatigued and damaged even when a heavy-duty forklift or small-diameter forklift or pipe cargo with a small-diameter caster is run on the waterproof finish structure and the waterproof finish structure. There is an effect that there is nothing to do.

  The present invention will be described in detail below.

  In the waterproof finishing structure of the present invention, a water-based epoxy resin cement composition comprising a water-based epoxy resin and a hydraulic cement is first applied and cured on the foundation concrete. The water-based epoxy resin cement composition fills voids on the surface of the underlying concrete, and when a coating material composition that is a water-based epoxy resin mortar composition to be applied next is applied, the water content in the coating material composition is reduced. Water is absorbed by the base concrete, and fine voids are formed in the coating composition due to the influence. Further, the coating composition is cured in that state, and the fine voids after curing become a path for moisture supplied from the base. As a result, the unsaturated polyester resin fiber reinforced resin layer applied to the upper layer of the coating material composition effectively prevents the swelling caused by the moisture passing through the fine voids.

  In the present invention, even if there are fine voids after curing in the coating material composition, in the present invention, a urethane resin cement composition composed of urethane resin and hydraulic cement is applied to the upper layer of the coating material composition and cured. Therefore, moisture passing through the fine voids in the coating material composition is adsorbed by the unhydrated cement in the urethane resin cement composition and blocked by this layer.

  Thus, in the present invention, the movement of moisture from the base concrete to the back surface of the unsaturated polyester resin fiber reinforced resin layer is changed to 3 based on the water-based epoxy resin cement composition layer, the coating material composition layer, and the urethane resin cement composition layer. One of the major features of this is that it is blocked by the layer, and this configuration is a groundbreaking unprecedented.

A water-based epoxy resin cement composition comprising a water-based epoxy resin and a hydraulic cement is applied to seal the base as described above, and a water-based epoxy comprising an epoxy resin and a water-based curing agent described in Japanese Patent No. 4794007. Hydraulic cement is added to the resin and mixed by stirring to make it uniform. The hydraulic cement is preferably blended in an amount of 50 to 200 parts by weight, more preferably 75 to 150 parts by weight, based on 100 parts by weight of the water-based epoxy resin. If it is less than 50 parts by weight, the curing of the filler is insufficient, and if it exceeds 200 parts by weight, the workability becomes poor. If it is less than 75 parts by weight, the curing of the filler tends to be insufficient, and if it exceeds 150 parts by weight, the workability tends to be poor. In the construction, it is coated with rubbing so as to be rubbed with a hammer or the like, and the coating amount is preferably 0.05 to 0.3 kg / m ² . 0.05kg / In ^m less than ² is insufficient the sealing of the base, in the 0.3kg / ^{m 2} than can not be ironing painted.

  Hydraulic cements include commercially available ordinary Portland cement, early-strength Portland cement, moderately hot Portland cement, sulfate-resistant Portland cement, white Portland cement and other Portland cements, blast furnace cement, silica cement, fly ash cement and other mixed cements. Further, calcareous aluminate, calcareous aluminate calcareous cement, phosphate cement and the like can be used.

On the hardened water-based epoxy resin cement composition is a water-based epoxy resin mortar composition containing a hydraulic cement, aggregate, and water-based epoxy resin, and the weight ratio of the hydraulic cement to water is 0.3 or more and 0.00. 4 or less, when the resin is a resin obtained by adding a curing agent that reacts with the epoxy resin to the epoxy resin, the resin solid content weight of the resin is 4% or more and 10% with respect to the weight of the total formulation including water. Hereinafter, the total pore amount of the cured product is 0.05 cc / g or more and 0.2 cc / g or less. A coating material composition having an I value of 1.0 to 1.5 is applied to 0.8 to 2.0 kg / m ² to form a cured layer. The water-based epoxy resin and water-based epoxy resin mortar composition are water-based epoxy resins or water-based epoxy resin mortar compositions described in Japanese Patent No. 4794007.

  The water-based epoxy resin used in the coating composition which is a water-based epoxy resin mortar composition is mixed with the epoxy resin described in Japanese Patent No. 4794007 in the same manner as the water-based epoxy resin cement composition. A mixture with an aqueous curing agent that can be dispersed in the epoxy resin and the epoxy resin and the aqueous curing agent are those described in this publication. As a commercially available product of epoxy resin, Jolieth JEX210A (epoxy resin manufactured by Aika Kogyo Co., Ltd., epoxy equivalent 180, solid content 100%, viscosity 0.7 Pa · s / 25 ° C.) is mentioned as specified in the publication. As a commercial product of a water-based curing agent and a self-emulsifying curing agent, as described in the publication, Jolie's JEX210B (epoxy resin curing agent manufactured by Aika Industry Co., Ltd., trade name, active hydrogen equivalent 750, solid 18% aqueous solution, viscosity 7 mPa · s / 25 ° C.).

The weight ratio of hydraulic cement to water in the water-based epoxy resin mortar composition is a weight ratio of water / hydraulic cement, and is generally referred to as W / C. The total amount of pores means the total amount of very small holes of several nanometers to several tens of micrometers in the coating composition, and the pore distribution is determined from the injection pressure and injection amount of mercury by the mercury intrusion method. This is the sum of the volume (pore volume) for each radius. T.A. The I value is a value obtained by dividing the viscosity of 2 rpm of the BH type rotational viscometer by the viscosity of 20 rpm in accordance with the thixotropic index test method of JIS A6024. T.A. When the I value is less than 1.0, the aggregate containing cement rapidly settles. When the I value exceeds 1.5, the self-leveling property is lowered, and a wave remains after it is applied with a scissors. The viscosity of the coating composition is preferably 0.3 Pa · s or more and 8 Pa · s or less at No. 4 rotor 20 rpm with a BH viscometer from the viewpoint of workability, and the viscosity is 0.3 Pa · s. If it is less than s and more than 8 Pa · s, the cocoon judgment is poor.

  The coating composition which is a water-based epoxy resin mortar composition has a fine pore structure after curing, as specified in Japanese Patent No. 4794007, and the water permeability of the JISA 6909 water permeability test B method is also 0. Since it is 2 ml or less, even if the foundation concrete contains a lot of moisture, the moisture is confined by the coating composition, and since it contains hydraulic cement and epoxy resin, it is extremely adherent to the foundation concrete wet with water. It is good.

  As with the water-based epoxy resin cement composition, the hydraulic cement used in the coating composition, which is a water-based epoxy resin mortar composition, is commercially available ordinary Portland cement, early strong Portland cement, moderately hot Portland cement, sulfate-resistant Portland cement. In addition, various portland cements such as cement and white portland cement, mixed cements such as blast furnace cement, silica cement, fly ash cement, aluminate calcareous cement, silicic acid aluminate calcareous cement, phosphate cement and the like can be used. In particular, in the coating material composition, white cement, that is, white Portland cement, is preferable in terms of good fluidity.

  The aggregate used in the coating composition which is a water-based epoxy resin mortar composition may be any material that can be used by mixing with a hydraulic material. However, in order to have self-leveling properties, JIS G5901 Nos. 48 to 150 No. 1 is preferable, and since the blending component and blending amount are determined by the weight ratio of the hydraulic cement and water and the resin solid content weight with respect to the total solid weight, it is actually the remaining component. If aggregates have the same particle size, etc., the same effect can be obtained, but silica and sand are the optimal because of cost and availability. If it is finer than JIS G5901, No. 150, the viscosity will be high, and the self-leveling property and dredging workability will be reduced. Commercially available products include Tohoku silica sand Nos. 6 and 7 (North Japan Industrial Co., Ltd., trade name).

  As other materials, an AE water reducing agent can be blended with the coating composition which is an aqueous epoxy resin mortar composition, and the AE water reducing agent described in paragraph 0045 of Japanese Patent No. 4794007 is used. be able to.

  As the mixing form of the coating composition, which is a water-based epoxy resin mortar composition, the epoxy resin, water-based curing agent, water, hydraulic component, and aggregate are the main compounds. It is preferable in use. In other words, water-based curing agent and water, epoxy resin, aggregate and hydraulic component are preferable to prevent insufficient mixing / dispersion, deactivation of characteristics, measurement error / error, I do not care.

The water-based epoxy resin mortar composition has a weight ratio of hydraulic cement to water of 0.3 to 0.4 and a resin solid content weight of 4% to 10% with respect to the total solid weight. The total pore volume of the cured product is 0.05 cc / g or more and 0.2 cc / g or less, and has good adhesion to the base concrete and is a multilayered urethane resin cement composed of urethane resin and hydraulic cement. Adhesion with the composition is good. In addition, the moisture rising from the base concrete is prevented from permeating to the back side of the unsaturated polyester resin fiber reinforced resin layer, resulting in a tough floor structure, which can cause peeling and swelling of the unsaturated polyester resin fiber reinforced resin layer. Will not occur.

  In addition, as disclosed in Japanese Patent No. 4794007, the water-based epoxy resin mortar composition is a resin solid state of a resin obtained by adding a curing agent that reacts with the epoxy resin to the epoxy resin. The weight is 4% or more and 10% or less based on the weight of the total formulation including water, and the T.I. Since the I value is from 1.0 to 1.5, the handling during construction is good and the self-leveling property is good.

Coat-weight of the water-based epoxy resin mortar composition is 0.8~2.0kg / ^{m 2,} is less than 0.8 kg / ^{m 2,} urethane resin cement composition and the unsaturated polyester resin fibers overlaid on this The following peeling energy with respect to the reinforced resin layer becomes insufficient, and if it exceeds 2.0 kg / m ² , the strength of the cured surface of the epoxy resin mortar composition becomes insufficient, and similarly the following peeling energy becomes insufficient.

  On the cured layer of the water-based epoxy resin mortar composition, a urethane resin cement composition composed of urethane resin and hydraulic cement is applied and cured. As the urethane resin, a one-component solvent-based urethane resin is suitable from the viewpoint of coating workability and adhesion to an unsaturated polyester resin fiber reinforced resin layer. As a specific urethane resin, for example, methylenediphenyl having an isocyanate group is used. Examples include diisocyanate (MDI), tolylene diisocyanate (TDI), hydrogenated methylene diphenyl diisocyanate (hydrogenated MDI), hexamethylene diisocyanate (HDMI), and isophorone diisocyanate (IPDI). Commercially available one-component solvent-based urethane resin is Jolies JU-1270 (trade name, solid content: 36.0% by weight, NCO content: 3.7% by weight, solvent composition: toluene 20-30% by weight / methyl ethyl ketone) 20-30% by weight / ethyl acetate 5-10% by weight, type of NCO: tolylene diisocyanate (TDI), manufactured by Aika Industry Co., Ltd.).

In the construction, since the main curing form of the water-based epoxy resin mortar composition as the underlayer is hydration, the water-based epoxy resin immediately after curing after the water-based epoxy resin mortar composition has been applied for about 24 hours. In some cases, unhydrated moisture may remain in the mortar composition layer, and the urethane resin is water for the purpose of adsorbing the remaining moisture so as not to cause problems such as foaming due to the moisture. Mix hard cement. In addition to this purpose, the hydraulic cement is blended for the purpose of adsorbing moisture that has passed through the fine voids in the coating material composition.

The blending amount of the hydraulic cement is suitably 25 to 140 parts by weight, preferably 40 to 110 parts by weight, based on 100 parts by weight of the urethane resin to be applied. If it is less than 25 parts by weight, the effect of preventing the foaming and adsorbing moisture that has passed through the coating composition should be insufficient, and if it exceeds 140 parts by weight, the coating workability becomes poor. If it is less than 40 parts by weight, the foaming prevention and moisture adsorption effects tend to be insufficient, and if it exceeds 110 parts by weight, the coating workability tends to be poor. In the construction, it is uniformly applied onto a coating material composition cured with a hammer, a brush, a roller brush, etc., and the coating amount is preferably 0.1 to 0.4 kg / m ² , more preferably 0.15 to 0.35 kg / m ² . If it is less than 0.1 kg / m ² , the effect of adsorbing moisture that has passed through the coating composition should be insufficient, and the effect of shielding the amine contained in the coating composition will be insufficient. In some cases, the unsaturated polyester resin of the unsaturated polyester resin fiber reinforced resin layer applied to the resin may be poorly cured, and if it exceeds 0.4 kg / m ² , the coating workability becomes poor. If it is less than 0.15 kg / m ² , the effect of adsorbing moisture that has passed through the coating composition tends to be insufficient, and the effect of shielding the amine contained in the coating composition is insufficient. Therefore, there is a tendency for the unsaturated polyester resin of the unsaturated polyester resin fiber reinforced resin layer applied thereon to be hardened, and when it exceeds 0.35 kg / m ² , the coating workability is low. There is a tendency to become defective.

  After forming a cured layer of urethane resin cement composition, an unsaturated polyester resin fiber reinforced resin layer is formed. The unsaturated polyester resin fiber reinforced resin layer is cured on a reinforced fiber sheet, for example, a glass fiber sheet. Applying an unsaturated polyester resin compounded with an agent and further overlaying a reinforcing fiber sheet, or after applying the unsaturated polyester resin, overlaying a reinforcing fiber sheet on the coated surface and further applying the unsaturated polyester resin, etc. It is formed by curing the unsaturated polyester resin in a reinforced fiber sheet and forming a fiber reinforced resin layer.

  In addition, on the unsaturated polyester resin fiber reinforced resin layer, acrylic resin paint, acrylic / silicone resin paint, acrylic / urethane resin paint, unsaturated, to improve the finished appearance and improve the weather resistance. A top coat such as a polyester resin-based paint may be applied.

  The waterproof finishing method of the present invention is a construction method for forming the waterproof finishing structure, and is constructed by the method described above.

  Hereinafter, the waterproof finishing structure and the waterproof finishing method according to the present application will be specifically described in Examples and Comparative Examples.

Example 1 to Example 3
In the evaluation of the peeling energy, a 70 × 70 × 20 mm mortar board, which is a substrate for adhesion strength test, is used as the foundation, and in the evaluation of the swollen area ratio, JISA 5371-2010 precast unreinforced concrete is used as the foundation. A 150 × 150 × 60 mm concrete flat plate obtained by cutting a product flat plate 300 × 300 × 60 mm into ¼ was used as a base. These ground surfaces are polished with sandpaper # 120 to remove the surface latency, and for concrete flat plates, the surface moisture is measured, and the Ket moisture meter HI-500 or HI-520 (trade name, Kett Co., Ltd.). After confirming that it is 5.0% or less at a concrete range of 40 mm and a concrete thickness of Scientific Research Laboratories, Jollyes JEX210A (epoxy resin manufactured by Aika Industry Co., Ltd., trade name, epoxy equivalent 180) 100 parts by weight, 100% solid content, viscosity 0.7 Pa · s / 25 ° C.) and Jolie's JEX210B (epoxy resin curing agent manufactured by Aika Industry Co., Ltd., trade name, active hydrogen equivalent 750, solid content 18% aqueous solution, viscosity (7 mPa · s / 25 ° C) and 400 parts by weight of ordinary Portland cement are mixed uniformly. The combined aqueous epoxy resin cement composition to 0.1 kg / ^{m 2} ironing painted with gold iron.

Next, 100 parts by weight of the above-mentioned Jolie's JEX210A, 400 parts by weight of Jolie's JEX210B, 1265 parts by weight of silica sand (JIS silica sand No. 100), 2120 parts by weight of white cement (Pacific Cement Co., Ltd., White Portland Cement), and 415 parts by weight of water When mixing silica sand and white cement, mix 5 parts by weight of Melflux AP101F (Degussa Construction Co., Ltd., modified polycarboxylic acid-based water reducing agent, trade name), and 0 weight ratio of hydraulic cement to water 35, resin solids weight 4% with respect to total solids weight, viscosity 0.7 Pa · s / 23 ° C. A coating material composition having an I value of 1.3 (Example 7 in Japanese Patent No. 4794007) is applied at a coating amount of 1.0 kg / m ² . As shown in Japanese Patent No. 4794007, the coating material composition has a total pore amount of a cured product of 0.15 cc / g. 1 day after application, 25 parts by weight of commercially available ordinary Portland cement with respect to 100 parts by weight of one-part solvent-based urethane resin, Jolies JU-1270 (69 parts by weight of ordinary Portland cement with respect to 100 parts by weight of solid urethane resin) the urethane resin cement composition) were uniformly mixed to example 1 cured 0.25 kg / m ² coated with.

In Example 2, only the coating amount of the coating composition applied in Example 1 was changed to 1.5 kg / m ^2, and in Example 3, the coating amount was similarly set to 1.8 kg / m ² . .

Comparative Examples 1 to 3
In Comparative Example 1, only the coating amount of the coating composition applied in Example 1 was changed to 0.5 kg / m ^2, and Comparative Example 2 was similarly applied to 2.2 kg / m ² . In Comparative Example 3, the urethane resin cement composition was directly applied to the base without applying the aqueous epoxy resin cement composition and the coating material composition in Example 1.

Evaluation items and evaluation methods

Peeling energy In the specimens of Examples 1 to 3 and Comparative Examples 1 to 3 which are mortar boards, the urethane resin cement composition is applied and a curing agent is blended one day later. Unsaturated polyester resin Joliase JE-2000 (trade name, tensile strength 20.0 MPa, elongation 55%, manufactured by Aika Kogyo Co., Ltd.) is applied at 0.5 kg / m ² . Immediately after application, a separately prepared aramid fiber reinforced unsaturated polyester resin-made 3 mm wide string (tensile strength 320 MPa, tensile elastic modulus 6800 MPa, elongation 5%) is applied, and the bond length of the string is obtained. Is cured at 23 ° C. for 7 days with a load of 0.22 MPa applied to the bonded portion. After that, the string-like body was pulled at a pulling speed of 0.1 mm / min at a peeling angle of 5 degrees, and the peeling energy W (mJ / cm ² ) was obtained from the following formula from the load (N) when the string-like body peeled. .

Peeling energy W (mJ / cm ² ) = P / (1-cos θ) / b
P: Load (N)
θ: peeling angle b: width of the bonded portion (mm)

Swelling area ratio In the test specimens of Examples 1 to 3 and Comparative Examples 1 to 3 which are concrete flat plates, one day after applying the urethane resin cement composition, the basis weight is 450 g. / M ² glass fiber mat is disposed, and 1.5 kg / m ^{2 of} unsaturated polyester resin Jolie JE-2000 (trade name, manufactured by Aika Industry Co., Ltd.) blended with a curing agent is applied thereon. The glass fiber mat was osmotically cured to form an unsaturated polyester fiber reinforced resin layer. Thereafter, it was cured at 23 ° C. for 7 days, a concrete flat plate was immersed in water to 10 mm below the surface of the test piece, irradiated with a 500 W-reflump lamp from 40 cm in height for 8 hours, and stopped for 16 hours for 60 cycles. The area of the bulge generated in the × 130 mm portion was recorded, and the bulge area ratio was determined by the following equation.

Expansion area ratio (%) = (total expansion area (mm ² ) / 16900 mm ² ) / 100

Evaluation results The evaluation results are shown in Table 1. In Examples 1 to 3, the peel energy was higher than that of Comparative Example 3 and had good adhesion, and the swelling area ratio was 0%, and no swelling occurred.

Claims (2)

A layer obtained by applying a water-based epoxy resin cement composition composed of a water-based epoxy resin and a hydraulic cement on an underlying concrete and curing, and a water-based epoxy resin mortar composition including the hydraulic cement, the aggregate, and the water-based epoxy resin. The weight ratio of the hydraulic cement to water is 0.3 to 0.4, and the resin solid weight of the resin when the epoxy resin is added with a curing agent that reacts with the epoxy resin, 4% or more and 10% or less based on the weight of the total formulation containing water, the total pore amount of the cured product is 0.05 cc / g or more and 0.2 cc / g or less, Urethane resin cement comprising a layer obtained by applying and curing 0.8 to 2.0 kg / m ² of a coating material composition having an I value of 1.0 to 1.5, and a urethane resin and a hydraulic cement thereon. A waterproof finish structure comprising a layer coated with a composition and cured, and an unsaturated polyester resin fiber reinforced resin layer formed thereon. An aqueous epoxy resin mortar composition comprising a hydraulic cement, an aggregate, and an aqueous epoxy resin, coated with an aqueous epoxy resin cement composition comprising an aqueous epoxy resin and a hydraulic cement, and cured. When the weight ratio of hard cement to water is not less than 0.3 and not more than 0.4, and the resin is made by adding a curing agent that reacts with the epoxy resin to the epoxy resin, the resin solid content weight of the resin includes water. However, the total pore amount of the cured product is 0.05 cc / g or more and 0.2 cc / g or less, based on the weight of the total formulation. A coating material composition having an I value of 1.0 to 1.5 is applied and cured at 0.8 to 2.0 kg / m ² , and a urethane resin cement composition comprising a urethane resin and a hydraulic cement is formed thereon. A waterproof finishing method comprising applying and curing, and further forming an unsaturated polyester resin fiber reinforced resin layer thereon.