JP2010127005A - Repair sheet - Google Patents

Abstract

The present invention relates to a repair sheet for a surface of a concrete structure using a known two-part curable resin, and can be formed into a rigid plate in a short time by simply bonding to a repair required surface, thereby covering the repair required surface. Therefore, a repair sheet capable of effectively preventing the deterioration of deteriorated concrete from the repair required surface is provided.
A first repair sheet 2 impregnated with one curable resin A forming a two-component curable resin and a second repair sheet 3 impregnated with the other curable resin B are provided. A repair sheet for promoting curing by attaching the repair sheet 2 and the second repair sheet 3 to the repair surface 4 of the concrete structure 1 in a superposed state so that the two curable resins A and B are brought into contact with each other.
[Selection] Figure 3

Description

  The present invention relates to a repair sheet that is attached to a repair required surface such as a deteriorated portion of a concrete structure surface such as a bridge, a viaduct, a tunnel, or a wall.

  In concrete floor slabs at bridges and viaducts, there are frequent situations where the concrete on the bottom of the concrete slab deteriorates and peels due to water leakage from the road surface.

  In Patent Document 1, as a method of repairing the risk of peeling off due to deterioration of the concrete, the surface concrete of the above part is removed, the surface concrete removal surface area is filled with polymer cement mortar containing reinforcing resin fibers, and the surface of the filled mortar is An on-site construction method is disclosed in which a synthetic resin net is attached, the polymer cement mortar containing reinforcing resin fibers is applied to the surface of the synthetic resin net, and the mesh is embedded in the mortar.

Japanese Patent Laid-Open No. 2007-100340

  However, the above repair method takes time to start construction, requires several steps and construction days, and has a problem that the construction cost is high, especially for repairing the above dangerous part of concrete peeling (repair required part). Has a problem that can not be quickly addressed.

  The present invention provides a repair sheet that appropriately solves the above problems.

  The repair sheet according to the present invention comprises a first repair sheet impregnated with one curable resin forming a two-component curable resin and a second repair sheet impregnated with the other curable resin.

  The first repair sheet and the second repair sheet are attached to the repair required surface of the concrete structure in a superposed state to bring both curable resins into contact with each other to promote curing, and thus to promote the curing of the first and second repair sheets. The hardened first and second repair sheets cover the repair required surface and prevent the fall of deteriorated concrete.

  The first repair sheet and the second repair sheet are sheets having a multi-cavity structure that can be impregnated with a two-component curable resin, and the sheet is made of synthetic resin fibers, organic fibers, carbon fibers, glass fibers, or the like. Nonwoven fabrics are suitable because they are rich in compression elasticity and voids.

  Instead of the non-woven fabric, a woven fabric made of each of the above materials, a spongy material such as sponge, or a paper material can be used.

  The opposite surface of the first repair sheet and the other surface or one surface are affixed with a release sheet as a protective sheet, and similarly the one surface and the other surface or one surface of the second repair sheet facing each other The release sheet is affixed to the surface, and the release sheet is peeled off and affixed to the surface requiring repair of the concrete structure, and the first and second repair sheets are adhered to each other.

  As means for improving the strength of the first and second repair sheets after curing, on the surface of the first repair sheet to which the second repair sheet is bonded, or on the surface of the second repair sheet to which the first repair sheet is bonded A net can be bonded and the net can be interposed at the bonding interface of both sheets.

  According to the present invention, the first and second repair sheets are bonded together in a polymerized state on the repair required surface of the concrete structure so that both repair sheets become rigid plates and can be strongly bonded and covered on the repair required surface. it can. Therefore, the fall of the deteriorated concrete from a repair required surface can be prevented effectively.

  According to the present invention, only the first and second repair sheets are superposed on and attached to the repair-required surface, and repair can be performed easily and quickly after waiting for the curing of both curable resins after attachment.

  The sheet for repairing a concrete structure according to the present invention is effective as an emergency repair until the start of repair by the on-site construction of the repaired portion of the concrete surface that has deteriorated and has a risk of peeling off.

  The best mode for carrying out the present invention will be described below with reference to FIGS.

  As shown in FIGS. 1 and 2, the repair sheet for the concrete structure 1 according to the present invention is the same as the first repair sheet 2 impregnated with one curable resin A forming a two-component curable resin. The second repair sheet 3 is impregnated with the other curable resin B.

  The first repair sheet 2 and the second repair sheet 3 are overlapped (the sheets 2 and 3 are overlapped before being applied to the surface of the concrete structure 1 or the sheets 2 and 3 are attached individually) Are attached to the repair required surface 4 of the concrete structure 1, and the two cured resins A and B are brought into contact with each other by the attachment to promote curing. Therefore, the first and second repair sheets 2 are attached. , 3 is promoted, and the repair required surface 4 is covered with a bonded body of the first and second repair sheets 2, 3 which are made into rigid plates by the curing, and the fall of the deteriorated concrete block is prevented in advance.

  The first repair sheet 2 and the second repair sheet 3 are sheets having a multi-cavity structure that can be impregnated with a two-component curable resin, and the sheets 2 and 3 include synthetic resin fibers, organic fibers, or carbon fibers. Or the nonwoven fabric which consists of glass fiber etc. is rich in compression elasticity and a space | gap, and is suitable.

  Instead of the non-woven fabric, a woven fabric made of each of the above materials, a spongy material such as sponge, or a paper material can be used.

  The release sheet 5 or 6 is affixed as a protective sheet to one surface and the other surface or one surface of the first repair sheet 2 to protect one of the curable resins A, and similarly the second repair sheet. 3 are attached to the opposite one surface and the other surface or one surface to protect the other curable resin B.

  The first repair sheet 2 and the second repair sheet 3 are prepared separately and used for on-site construction.

  Alternatively, each of the long first and second repair sheets 2 and 3 is rolled up and stored for use in construction on site. On site, rolls are unwound and cut to the required length for use.

  Alternatively, as a specific example, as shown in FIG. 2C, the first repair sheet 2 and the second repair sheet 3 are overlapped, and are bonded to both sheets 2 and 3 with a release sheet 7 interposed at the overlapping interface, The release sheets 5 and 6 are attached to the surfaces of the first and second repair sheets 2 and 3 attached via the release sheet 7 on the opposite side of the overlapping surface.

  The laminated body of the first and second repair sheets 2 and 3 shown in FIG. 2C is stored as the laminated body and used for on-site use.

  The laminated body of the first and second repair sheets 2 and 3 is stocked as a sheet of the laminated body and used on the site, like the repair sheets 2 and 3 of FIGS. 2A and 2B. Alternatively, the laminate is made into a long length, wound in a roll shape, stored for use on site, the laminate is unwound and cut into a required length for use.

  In any of the above examples, the release sheets 5, 6, and 7 are peeled off at the time of on-site construction, and are used for attaching to the surface of the concrete structure 1 and for attaching the first and second repair sheets 2 and 3.

  The release sheets 5, 6 and 7 are bonded together with the viscosity of the curable resins A and B.

  Next, repair work using the first and second repair sheets 2 and 3 shown in FIGS. 1 and 2 will be described.

  At the repair site, as shown in FIG. 3A, first, one release sheet 5 of the first repair sheet 2 is peeled off and attached to the repair surface 4 of the concrete structure 1 with the adhesiveness of the curable resin A. wear.

  Next, as shown in FIG. 3B, the other release sheet 6 of the first repair sheet 2 is released.

  Next, as shown in FIG. 3C, one release sheet 5 of the second repair sheet 3 is peeled off, and the second repair sheet 3 is superposed on the surface of the first repair sheet 2 from which the release sheet 6 has been peeled, and cured. Affixed with the adhesiveness of the shaped resins A and B. Therefore, both curable resins A and B are brought into contact with each other, so that the infiltration of each curable resin A and B from one sheet to the other sheet is promoted, and curing is started.

  As a means for promoting the contact between the two curable resins A and B, a rolling roller 8 is rolled on the outer surface of the other release sheet 6 of the second repair sheet 3 to be transferred to the first and second repair sheets 2 and 3. Pressure is applied and the second repair sheet 3 is pressed against the first repair sheet 2.

  The first and second repair sheets 2 and 3 have compression elasticity, and the sheets 2 and 3 are compressed by the rolling pressure by the rolling roller 8 while the curable resin B is transferred from the second repair sheet 3 to the first. At the same time, the curable resin A is leached from the first repair sheet 2 to the second repair sheet 3 to the repair sheet 2 to promote contact between the two resins A and B, that is, mixing. As a result, the two curable resins A and B are cured, the first and second repair sheets 2 and 3 are cured to form a rigid plate, and are firmly bonded to the repair required surface 4 to cover it.

  Next, as shown in FIG. 3D, the other release sheet 6 of the second repair sheet 3 is released. The curing time of the curable resins A and B is about 24 hours, and the repair effect can be obtained in a short time.

  The first repair sheet 2 and the second repair sheet 3 shown in FIGS. 1 and 2 are superposed and pasted at the repair site, and then the superposition sheet is required by the first repair sheet 2 or the second repair sheet 3. It is affixed to the repair surface 4 and promotes curing by contact of both curable resins A and B.

  Alternatively, one of the first and second repair sheets 2 and 3 is affixed to the repair required surface 4 and the other is overlapped and affixed to the outer surface to promote curing by contact of both curable resins A and B.

  The first and second repair sheets 2 and 3 are repaired surfaces with the adhesive force of the curable resin A with the exposed surfaces of both sheets 2 and 3 after the release sheets 5, 6 and 7 are peeled off. 4 and the sheets are stuck to each other with the adhesive strength of both curable resins A and B.

  As shown in FIGS. 5 and 6, as a means for improving the strength of the hardened and rigid first and second repair sheets 2 and 3, the first repair sheet 2 to which the second repair sheet 3 is bonded is used. The net 9 can be bonded to the surface or the surface of the second repair sheet 3 to which the first repair sheet 2 is bonded, and the net 9 can be interposed at the bonding interface between both sheets 2 and 3.

  As a preferred example of the net 9, as shown in FIG. 4, a net 9 in which a flat band meridian and parallels are formed by a set of multifilaments 10 made of synthetic resin and used as a lattice is used.

  Preferably, the flat band-like meridian and latitude line made of the multifilament 10 have a structure in which the net 9 is formed by superimposing the latitude lines on the surface of the meridian.

  Next, repair work using the first and second repair sheets 2 and 3 shown in FIGS. 4 and 5 will be described.

  At the repair site, as shown in FIG. 7A, first, one release sheet 5 of the first repair sheet 2 containing the net 9 is peeled off, and the adhesiveness of the curable resin A is applied to the repair required surface 4 of the concrete structure 1. Paste it.

  Next, as shown in FIG. 7B, the other release sheet 6 of the first repair sheet 2 is released to expose the net 9.

  Next, as shown in FIG. 7C, one release sheet 5 of the second repair sheet 3 not having the net 9 is peeled off, and the second repair sheet 3 is peeled off from the release sheet 6 of the first repair sheet 2 And pasted with the adhesiveness of the curable resins A and B. Therefore, both curable resins A and B are brought into contact with each other to start curing.

  The curable resins A and B are in contact with each other through the eyes of the net 9, and are further in contact with each other through the meridian and the parallels made of the multifilament 10 to promote the curing.

  As a means for promoting the contact between the two curable resins A and B, a rolling roller 8 is rolled on the outer surface of the other release sheet 6 of the second repair sheet 3 to be transferred to the first and second repair sheets 2 and 3. Pressure is applied, the second repair sheet 3 is pressed against the first repair sheet 2, and the net 9 is pressed against the first and second repair sheets 2, 3.

  The first and second repair sheets 2 and 3 have compression elasticity, and both the sheets 2 and 3 are compressed by the rolling pressure by the rolling roller 8, and the curable resins A and B are oozed out to the net 9 This facilitates the contact of both resins A and B via As a result, the two curable resins A and B are cured, the first and second repair sheets 2 and 3 and the net 9 are cured to form a rigid plate, which is firmly bonded to the repair required surface 4 and covers it.

  Next, as shown in FIG. 7D, the other release sheet 6 of the second repair sheet 3 is released.

  Similarly to the above, the first repair sheet 2 and the second repair sheet 3 shown in FIGS. 4 to 7 are overlaid and pasted via the net 9 at the repair site, and then the overlaid sheet is attached to the first repair sheet 2 or the second repair sheet 3. The two repair sheets 3 are attached to the repair required surface 4 to promote curing by contact between the two curable resins A and B.

  Alternatively, one of the first and second repair sheets 2 and 3 is affixed to the repair required surface 4 and the other is overlapped and affixed to the outer surface to which the net 9 is affixed to promote curing by contact of both the cured resins A and B. .

  The same applies to the laminate shown in FIG.

  When the laminate shown in FIG. 2C is used in the steps of FIGS. 3 and 7, the exposed surface from which one release sheet 5 of the first repair sheet 2 forming the laminate is peeled off and the release sheet 5 is peeled off. Thus, the laminated body is stuck on the repair surface 4 of the concrete structure 1 as it is, and then the second repair sheet 3 is peeled off from the first repair sheet 2 and the release sheet 7 is peeled off. Affix to the top.

  Next, after applying a rolling pressure to the release sheet 6 of the second repair sheet 3 with the rolling roller 8, the release sheet 6 is peeled off. As described above, the curing of the two curable resins A and B and the rigid plate formation of the first and second repair sheets 2 and 3 are promoted.

  As the two-part curable resin in each of the above examples, known ones can be used. As an appropriate example, “Denka” manufactured by Denki Kagaku Kogyo Co., Ltd. (Denka, 2-1-1 Nihonbashi Muromachi, Chuo-ku, Tokyo, Nihonbashi Mitsui Tower) Hard Rock II "™ is used. Hard Rock II DK550-04 is a two-component main dosage form low odor acrylic resin, and both resins A and B are put on the market in separate containers, and one liquid is impregnated in the first repair sheet 2, The second repair sheet 3 is impregnated with the other liquid.

  The two-part curable resin is a main agent in which one does not have a relationship of curing the other, and both one and the other are cured by contact. The first repair sheet 2 is impregnated with a curable resin A that is one curing main agent, and the second repair sheet 3 is impregnated with a curable resin B that is the other curing main agent. Therefore, both sheets 2 and 3 can be made into rigid plates by contact of both curing main agents.

  The above “Denka Hard Rock II” (trademark) is patented as Japanese Patent Nos. 2839348 and 2769232, and the two-part curable resin in the present invention can be understood.

  One liquid and the other liquid forming the two-component curable resin impregnated in the first and second repair sheets 2 and 3 are made of the modified acrylic resin shown in the above patent, and both main agents come into contact with each main agent. Curing is performed, and both repair sheets 2 and 3 are cured.

  In the present invention, when the repair sheet is pasted without removing the deteriorated portion of the repair required surface 4 of the concrete structure, the deteriorated portion of the repair required surface 4 is removed and attached to the peripheral surface region including the deteriorated portion. Including cases.

  If each of the first and second repair sheets 2 and 3 is too thick, contact failure of the two-part curable resin, resulting in poor curing, the thickness of each of the sheets 2 and 3 is 1 to 5 mm (both The thickness of the bonded body of the sheets 2 and 3 is about 2 to 10 mm), but is not limited thereto.

  Further, after the first and second repair sheets 2 and 3 are attached to the repair required surface 4, a protective film 11 made of an acrylic resin film or a fluororesin film can be attached to the outer surface of the second repair sheet 3. .

  The protective film 11 is attached to the outer surface of the second repair sheet 3 using an adhesive after the two-component curable resins A and B are cured. Alternatively, the two-component curable resins A and B are adhered to the outer surface of the second repair sheet with the adhesiveness of the resin before curing.

  Moreover, the said protective film 11 can be previously affixed on the outer surface of the 2nd repair sheet | seat 3, and it can use for repair work. In this case, the release sheet 6 on the surface to which the protective film 11 is attached can be saved.

A is a perspective view showing a part of a first repair sheet impregnated with one curable resin forming a two-part curable resin, and B is a second repair sheet impregnated with the other curable resin. The perspective view shown partially cut away. A is a cross-sectional view of the first repair sheet, B is a cross-sectional view of the second repair sheet, and C is a cross-sectional view showing a state in which the first and second repair sheets are laminated via release paper. A to D are cross-sectional views illustrating a repairing process of a concrete structure using the first and second repair sheets. The expansion perspective view of the net interposed between the 1st and 2nd repair sheet. A is a perspective view showing a part of the first repair sheet with the net bonded together, and B is a perspective view showing a part of the second repair sheet used in combination with the first repair sheet. 5A is a cross-sectional view of the first repair sheet of FIG. 5A, and B is a cross-sectional view of the second repair sheet of FIG. 5B. FIGS. 6A to 6D are cross-sectional views illustrating a concrete structure repairing process using the first and second repair sheets shown in FIG. 5.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Concrete structure, 2 ... 1st repair sheet, 3 ... 2nd repair sheet, 4 ... Repair required surface, 5, 6, 7 ... Release sheet, 8 ... Rolling roller, 9 ... Net, 10 ... Multifilament, 11 ... Protective film, A, B ... Curing resin.

Claims (4)

Consists of a first repair sheet impregnated with one curable resin forming a two-part curable resin and a second repair sheet impregnated with the other curable resin, the first repair sheet and the second repair sheet A repair sheet characterized in that it is attached to a repair required surface of a concrete structure in a superposed state to bring both curable resins into contact with each other to promote curing. 2. The repair sheet according to claim 1, wherein the first repair sheet and the second repair sheet are made of a nonwoven fabric, a woven fabric, a spongy body, or a paper material. The release sheet is affixed to one surface and the other surface or one surface of the first repair sheet, and the release sheet is similarly applied to the one surface and the other surface or one surface of the second repair sheet. The repair sheet according to claim 1, wherein: is attached. The repair sheet according to claim 1, wherein a net is bonded to the surface of the first repair sheet to which the second repair sheet is bonded, or to the surface of the second repair sheet to which the first repair sheet is bonded. .

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