JPH05295806A - Water-swelling water stopper material for concrete joint - Google Patents

Abstract

PURPOSE:To obtain a water stopper material capable of expanding only toward the thickwise direction for concrete joints. CONSTITUTION:A thin strip of water-swelling water stopper material 5 made of a water-swelling rubber or resin, whose one side has a flat or inverted trapezoidal form and the other side has a waved form having alternately continuous recessions 2 and projections 3, is provided. The expanding speed of the material 5 by water absorption is set up to be slower than the setting speed of joint concrete. Or, a water-soluble thin film 5 is provided for all or partial outer surface of the stopper material 5 to form a water-swelling water stopper, and the water stopper 5 is placed along the joint face of concrete.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-expandable water-stopping material for splicing concrete walls, such as an outer wall of a house or a side wall of a waterway, and more specifically to the expansion of the water-expandable water-stopping material. This relates to the fact that water is concentrated only in the thickness direction.

[0002]

2. Description of the Related Art Japanese Patent Publication No. 60-6236 discloses a water-expandable water-stopping material of this type. The publication discloses that an unvulcanized water-expandable rubber layer A in which a superabsorbent resin is dispersed is provided on both surfaces of an unvulcanized water-expandable rubber layer B that absorbs expansion of the rubber layer A due to water absorption other than in the thickness direction. It describes a water-expandable water-stop material obtained by laminating one layer at a time to form a three-layer structure and simultaneously vulcanizing.

[0003]

However, the publication makes it difficult to manufacture because the different rubbers are bonded in three layers, and the intermediate layer whose elongation is to be stopped is considerably damaged by the elongation pressure of the upper and lower layers. Since it grows at a rate, there is a problem that when it is interposed in the concrete joint surface, it fluctuates vertically and horizontally to form a void, which causes water leakage.

[0004]

According to the present invention, a rubber or a resin that expands by being hydrated has a flat or inverted trapezoidal shape on one side, and recesses and protrusions are alternately continuous on the other side.
A strip-shaped water-expandable water-stopping material having multiple or several corrugated surfaces is formed, and the water-expandable water-stopping material is interposed along the concrete joint wall surfaces to form an end surface of the joint concrete wall. It is intended to solve such a problem by preventing the water blocking material from expanding in the longitudinal direction by the engagement of the corrugated surface and the corrugated surface.

[0005]

The water-expandable water-stopping material of the present invention is attached to the end surface of the concrete wall which has been preliminarily struck in such a way that a flat surface is glued, or when the reverse trapezoidal surface is pushed in when the concrete wall is still soft, and then concrete is attached. The walls are smashed together. Since the water-expandable water-stopping material is the seamed concrete wall that holds the corrugated surface of the water-stopping material, it is prevented from extending in the longitudinal direction, expanding exclusively in the thickness direction, and tightly pressing the end faces of the concrete wall. Then, the water between the concrete wall surfaces is reliably sealed. By forming the water-swellable water-blocking material so that the rate of expansion due to the water content is slower than the setting rate of concrete, the above-mentioned water sealing action can be ensured. Further, if the entire surface or a part of the water blocking material is covered with a water-soluble thin film, the water blocking material will start to expand and seal with water after the setting of concrete.

[0006]

Embodiments Embodiments will be described below with reference to the drawings.

FIGS. 1 to 5 show a first embodiment, in which one side has a flat surface with rubber that expands when it contains water, and a corrugated surface 4 in which a concave curved surface 2 and a convex curved surface 3 alternate is provided on the other side. Forming a strip-shaped water-expandable water-stopping material 5 having an appropriate thickness, and attaching the flat surface 1 to the end surface 6a of the concrete wall 6 that pre-strikes the water-stopping material 5 by gluing The wall surface 8 having a predetermined size is formed in the manner that the concrete wall 7 is spliced across the water blocking material 5. By this jointing of the concrete walls 7, the corrugated surface 4 of the water blocking material 5 is clamped by the concrete walls 7, and the expansion of the water blocking material 5 in the longitudinal direction is prevented, but only in the thickness direction, that is, the concrete wall 6, It expands only in 7 directions and seals with water.

[0008] At this time, if the water-stopping material 5 is mixed and formed so as to have an expansion rate slower than the setting speed of the splice concrete wall 7, the water-stopping material 5 expands after the setting concrete wall 7 is solidified and becomes tight. To be sealed with water.

FIG. 5 shows the action thereof, and the line of expansion action a of the water blocking member 5 penetrates deeply into the concrete wall 7.

FIG. 6 shows an example in which one surface of the water blocking material 5 is replaced by a flat surface 1 and formed into an inverted trapezoidal surface 1a, and the end surface 6a is embedded and attached at the uncondensed stage. FIG. An example in which the corrugated surface 4a is formed on both side surfaces of the material 5 is shown, and FIG. 8 shows an example in which a trapezoidal corrugated surface 4b is formed instead of the gentle unevenness.

FIG. 9 shows an example in which the corrugated surfaces 4 are offset from each other and provided in two rows, and FIG. 10 shows an example in which they are provided in three rows.
Reference numeral 11 shows an example in which a through hole 4c is provided instead of the corrugated surface, and FIG. 12 shows an example in which the groove 4d is provided. In each example, the other structure is the same as that of the first embodiment.

Further, as shown in FIGS. 13 (a) and 13 (b), when the entire surface of the water blocking material 5 or particularly the inverted trapezoidal surface 1a is covered with a water-soluble thin film 9 which dissolves after the setting of concrete, The material 5 will start water-containing expansion after the concrete walls 6 and 7 are solidified to further ensure water sealing.

[0013]

As described above, according to the present invention, since the corrugated surface having the concavo-convex curved surface is provided on one surface or both sides of the water-swellable water blocking material, the concrete wall to be spliced meshes with the corrugated surface. Since the water-stopping material is prevented from expanding in the longitudinal direction and expands only in the thickness direction by sandwiching it, the water-stopping material is brought into close contact with the pour-jointing concrete wall to ensure water sealing.

Further, since the expansion in the longitudinal direction is prevented, there is an effect that the water stopping material does not move or meander.

Further, the water-expandable water-stopping material is compounded and formed so as to have an expansion rate due to the water content slower than the setting speed of the splicing concrete, and a water-soluble thin film is formed on the entire surface or a part of the outer surface of the water-expandable water stoppage material. By providing the water-stopping material, the water-stopping material has an effect that it starts water-containing expansion after setting of the splice concrete wall and ensures water sealing.

Further, since the water-swellable water-stopping material of the present invention is formed of a single rubber or resin, there is an effect that it can be manufactured easily and efficiently.

[Brief description of drawings]

FIG. 1 is a front sectional view showing an example of construction of a water blocking material according to a first embodiment.

FIG. 2 is a partial front cross-sectional view showing an example of construction on the horizontal joint wall of the same.

FIG. 3 is a perspective view of the water blocking material.

FIG. 4 is a perspective view showing the same as being attached to a precast concrete wall.

FIG. 5 is an operation example diagram of the same.

FIG. 6 is a cross-sectional view showing a construction example of an example in which one surface of the water blocking material is an inverted trapezoidal surface.

FIG. 7 is a plan view showing an example in which corrugated surfaces are provided on both side surfaces of the water blocking material.

FIG. 8 is a front view showing an example in which a trapezoidal corrugated surface is provided.

FIG. 9 is a perspective view showing an example in which two wavy surfaces are provided alternately.

FIG. 10 is a perspective view showing an example in which corrugated surfaces are provided in three alternating rows.

FIG. 11 is a perspective view showing an example in which through holes are alternately formed instead of corrugated surfaces.

FIG. 12 is a perspective view showing an example in which grooves are alternately formed on both side surfaces.

13A is a perspective view showing an example in which the upper surface and side surfaces of the water blocking material are coated with a water-soluble thin film, and FIG. 13B is a perspective view showing an example in which the entire surface is coated with a water-soluble thin film.

[Explanation of symbols]

 1 is a flat surface 1a is an inverted trapezoidal surface 2 is a concave curved surface 3 is a convex curved surface 4 is a corrugated surface 4a is a corrugated surface provided on a side surface 4b is a trapezoidal corrugated surface 4c is a through hole 4d is a groove 5 is a water-expandable waterproof material 6 is a concrete wall to be precast 6a is a top surface 7 is a concrete wall to be spliced 8 is a wall surface 9 is a water-soluble thin film

Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location F16J 15/10 V 8207-3J D 8207-3J

Claims (4)

[Claims] 1. A strip-like shape in which one surface is made flat or inverted trapezoidal with rubber or resin that expands when it contains water, and one or several corrugated surfaces in which concave portions and convex portions are alternately continuous are provided on the other surface. The water-swellable water-stopping material for concrete splicing, wherein the water-swellable water-stopping material is formed, and the water-swellable water-stopping material is interposed along the wall surface of the concrete splicing joint. 2. The water-swellable waterproof material according to claim 1, wherein corrugated surfaces are provided on both side surfaces in the longitudinal direction of the water-swellable waterproof material. 3. The water-swellable water-stopping material according to claim 1, wherein the water-swellable water-stopping material is formed so as to have a rate of expansion due to the water content being slower than a setting rate of the splice concrete. 4. The water-swellable waterproof material according to claim 1, wherein a water-soluble thin film is provided on the entire surface or a part of the outer surface of the water-swellable waterproof material.