JPS6058352B2 - Floating repair method for mortar etc. - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is a method for repairing floating portions of surface materials such as mortar, tiles, and stones painted or attached to the concrete surface of a building structure by injecting an adhesive into the floating portions. It is related to.

(Prior art and its problems) Mortar, tiles,
Surface materials such as stones are painted or pasted, but due to repeated expansion and contraction due to changes in temperature and the passage of time, the adhesive strength weakens and lifts occur, and if this is left untreated. Eventually, the surface material will break and peel off and fall.

Therefore, at the initial stage when floating occurs, a hole is drilled in the surface material and an adhesive is injected through the hole to bond the surface material to the concrete structure in order to prevent the floating portion from expanding and to prevent it from peeling and falling. However, if the floating part grows large and the distance between the frame and the surface material or the diameter of the floating part is large, the floating part may expand or collapse.

This is because the adhesive, which has a considerable weight, is injected into the floating part under pressure.

That is, even if the adhesive has a low viscosity, it is injected using an injection gun while applying a constant pressure.

In order to bond the body of the floating part and the surface material, the injected adhesive must have internal pressure to firmly bond them together. However, as the pressure inside the floating part increases, the surface material will move outward. Since it is pressed, peeling at the periphery of the floating portion is facilitated. In addition, as mentioned above, the surface material that causes the floating part expands and contracts repeatedly, so its strength as a surface material decreases, and the pressure inside the floating part increases and the injected adhesive It becomes unable to withstand the weight and is destroyed.

Even if it were possible to bond the surfacing material to the structure using this method, it would require a large amount of adhesive, and the finished product would have lumps on the wall, making it expensive or aesthetically undesirable. I can't say that.

If you try to force the surface material as it is against the structure by physical means in order to reduce the gap between the structure and the surface material, the surface material will be forced too hard and break.
It's getting to the point where it can't even be repaired anymore.

(Technical Problem) The present invention is a method for repairing floating portions of surface materials such as mortar, tiles, stones, etc. painted or attached to the concrete surface of a concrete structure by injecting an adhesive into them. The challenge was to repair large bulges using a small amount of adhesive.

(Technical means) The technical means to solve this technical problem are (a) embedding and fixing anchor bolts in the structure at the floating part or the outside thereof, and (b) temporarily fixing the holding frame to the surface material. to press the
(c) After cutting the surfacing material around the periphery of the floating part, move the holding frame forward to bring the surfacing material close to or in contact with the structure, (d) Next, drill an appropriate number of holes in the surfacing material and insert the holes through the surfacing material. This involves press-fitting an adhesive between the surface material and the structure.

(Operation of technical means) The bulging floating portion is held in a pressed state by a frame temporarily fastened to bolts fixed to the frame.

When the surfacing material is cut along the periphery of the floating part, the pressing force that the surfacing material receives from the holding frame is different from when the surfacing material is cut at the middle part of the floating part. Even if the surface material is cut around the entire circumference of the floating portion for pressing, the surface material will not slip from the holding frame or fall.

After cutting, when the holding frame is gradually moved toward the body, the surface area of the surface material is larger than the surface area of the body corresponding to the floating part, so overlapping parts of the surface materials are formed. When the surface material is flattened while being removed and the surface material is brought close to or in contact with the skeleton, the gob-like bulge of the surface material is corrected and flattened.

At this stage, if holes are drilled in the surface material and adhesive is injected between the frame and the surface material, the adhesive will be injected between the two with a small floating width without destroying the surface material. be.

(Effects of the present invention) As described above, according to the construction method of the present invention,
Since the periphery of the floating portion is cut and the surface material is moved toward the frame, the surface material becomes substantially flat without breaking and falling, and the floating portion does not expand.

Furthermore, even if some cracks occur during the movement of the surface material, the entire surface material is held down by the holding frame, so it will not fall, and once the adhesion is completed, no problem will occur at the cracked location.

Since the adhesive is injected into the gap between the surface material and the structure while it is being pressed, it can be injected with sufficient pressure, which has the advantage of firmly bonding the structure and surface material. .

Furthermore, according to the method of the present invention, the original surface material is used as is, rather than destroying the surface material and applying new mortar, etc., so there is no change in the degree of discoloration of the surface material, and no bump-like bumps occur. There are benefits that do not arise.

(Example) Next, a specific example of the above technical means will be described with reference to the drawings.

First, in the floating part 2 of the concrete structure 1, holes are drilled from the outside of the surface material 4 to reach the frame 3, and an appropriate number of anchor bolts 5, 5 are embedded and fixed.

In FIG. 1, bolts are fixed to the outside of the floating portion 2, but it is also possible to drill holes with a slightly larger diameter in the floating portion and fix the bolts with the bolts. Next, the floating surface material 4 is cut along the peripheral edge 8 of the floating portion 2 while the holding frame 7 is pressed and held from the outside of the floating surface material 4.

At this time, in order to completely prevent the floating surface material 4 from falling, a construction net may be interposed inside the holding frame 7. After cutting the surface material 4, remove each nut 6.
is gradually tightened and the holding frame 7 is moved in the direction of the arrow in FIG. 2 to flatten the floating surface material 4 and bring it close to or in contact with the frame 3, as shown in FIG. Reduce width. Next, an appropriate number of holes 9, 9 are bored in the surface material 4, and a nozzle of an adhesive filling machine (not shown) is pressed through the holes 9 to press the adhesive 10 between the frame 3 and the surface material 4. The frame 3 and the surface material 4 are bonded together.

At this time, the holes 9 may be made to reach the frame 3 and bolts or pins may be embedded therein, and these may have the function of a reinforcing body that connects the frame 3 and the surface material 4 with the adhesive 10. . After the adhesive 10 is cured and hardened, the holding frame 7 is removed, the anchor bolt 5 is cut, and the cut portions of the hole 9 and the peripheral edge 8 are surface-treated to complete the repair process.

Brief explanation of one drawing Figure 1 is a front view of the holding frame attached to the structure where floatation has occurred, Figure 2 is a sectional view taken from ■-■ in Figure 1, and Figure 3 is a state in which the holding frame has been moved. FIG.

2... floating part, 3... skeleton, 4...
... Surface material, 5 ... Bolt, 7 ... Holding frame.

Claims (1)

[Claims] 1. Mortar painted or attached to the concrete surface of the building structure;
In a method of injecting adhesive into the floating part of a surface material such as tile or stone to repair it, anchor bolts are embedded and fixed in the frame at the floating part or outside of it, and a holding frame is temporarily fixed to this to repair the surface material. After pressing the surface material and cutting the surface material at the peripheral edge of the floating part, the holding frame is advanced to bring the surface material close to or in contact with the structure, and then an appropriate number of holes are drilled in the surface material and the surface material is removed from the holes. A repair method that involves press-fitting adhesive between the frame and the frame. 2. The method according to claim 1, wherein a net is interposed between the holding frame and the surface material. 3. The method according to claim 1 or 2, in which, when press-fitting the adhesive between the surface material and the frame, holes are made to reach the frame and bolts or pins are embedded and bonded.