JPS6237441A - Sealing waterproof construction method of hollow elastic joint material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Use This is an elastic sealing and waterproofing method for expansion joints in a structure, which is characterized by having a hollow structure.

BACKGROUND OF THE INVENTION Conventionally, two-component or one-component elastic sealants have been used for common expansion joints in structures with a joint width of 40 mm or less. These materials are initially made of highly viscous liquid substances, forming a so-called grease-like form, and the sealant filled into the joint shape is subject to chemical reactions, moisture reactions, or evaporation, depending on the material. begins to harden, and over time changes into a rubber elastic body. Once it hardens, it becomes a material with very strong rubber elasticity.

Problem to be Solved by the Invention The stress generated as the structure 4 expands and contracts (FIGS. 15 and 17) causes peeling of the adhesive interface 7 (FIG. 16), and its magnitude is It is proportional to the inherent tensile strength of the elastic body. In addition, it has excellent adhesive strength due to the improved material quality, and if the structure 4 succumbs to the generated stress, the structure 4 will be destroyed (
(Fig. 18). In the conventional elastic sealing method, the backup material 6 plays an important role as an auxiliary material in order to adjust the thickness of the elastic joint and prevent three-sided adhesion. Now, when the joint width is reduced due to expansion of the structure 4 (Fig. 17), the shapes of the backup material 6 and the elastic joint material 5 in this joint are deformed as shown in Fig. 17-6, and this elastic joint material 5 Since the inside of the joint of the structure 4 is blocked by the backup material 6, escape ports for the protruding surplus volume are concentrated in the outer opening. the result,
A unidirectional shearing force acts toward the outside of the joint over the entire adhesive interface 7, which is one of the main causes of peeling. In order to reduce the stress generated in rubber elastic joint materials such as those mentioned above, after curing, low modulus with low tensile strength,
That is, materials that generate less stress have also been developed. However, if the tensile strength value of this material is set too low, it will lead to high slump and sag during construction. After curing, it is unable to withstand the internal and external pressures applied to the joints, causing them to expand and cause joint failure.There are limits to the use of such materials with low modulus, and this problem remains unsolved at present. The present invention attempts to solve the problem of the trade-off between the magnitude of generated stress and the strength of the joint material by using a hollow joint material with rubber elasticity.

Means for solving the problem Most of the delamination phenomena of elastic joints are caused by the stress generated. Now, in order to minimize the stress generated in the elastic joint material, the structure of the elastic joint material is made into a hollow type, and the construction procedure will be described with diagrams. As shown in FIG. 1, a primer 2' is applied to both sides of the joint, and after drying, a material 2 made of the same material as the hollow tube 1 and adapted to be brushable is applied. Next, as shown in Fig. 2, a previously prepared hollow tube 1 made of a material that has rubber elasticity and can be spliced and has a circular cross section is quickly inserted into the joint before the material 2 hardens. Insert and fill. After filling the hollow tube 1, fill the space 3 above the joint between the joint side surface and the hollow tube 1, which occurs during insertion, with the material 2.
Apply and fill as shown in the figure. In addition, for the connection between the elastic hollow tubes, which may naturally occur, a successor tube made of the same material as the elastic hollow tubes (Fig. 4 - Fig. 5 - Fig. 6 - Fig. 7 - Fig. 7) Use Figure 8 etc.

The function of the sealing and waterproofing method using hollow elastic joint material, which has a structure as described above, will now be explained using a diagram.

After the hollow tube 1 is inserted and before the material 2 hardens, the force relationship within the joint is as shown in FIG. Due to the restoring force inherent in the pipe 1, F1 in the area a of FIGS. 9 and 10
, F2 force is generated, and this generated force always acts on structure 4
It acts by pressing against the side of the joint. Since the joint structure has such an effect, the hollow elastic joint material actively follows fluctuations in joint width due to shaking of the structure 4 before the material 2 hardens. 9th
This has almost no effect on the adhesion situation in the area a in Figure-a. Also, in areas b and b', since the material 2 is in a liquid state with a viscosity adjusted to the extent that it can be brushed, it easily follows fluctuations in joint width due to the action of surface tension. Next, after the material 2 hardens, the force relationship within the joint when the structure 4 contracts is as shown in FIG.
This occurs when the rubber elastic hollow tube 1 is under tension. Since the structure of this rubber elastic joint material is hollow, it can be inferred that the stress generated at that time shows a stress distribution as shown in Fig. 12, and therefore the stress generated in the joint material 1 is b and b', and the magnitude of the acting force is equal to the restoring force remaining in the hollow tube 1 of the rubber elastic body. Next, when the structure 4 expands, the rubber elastic hollow tube 1 in the joint becomes crushed as shown in FIG. From Equation 1, it can be easily inferred that a distribution as shown in FIG. 14 is shown. For this reason, the repulsive stress generated in the hollow joint material 1 remains only in areas b and b', and the effect of the generated repulsive stress is small and has almost no effect on area a. . or,
Since areas b and b' are independent from each other with the space in area a in between, the excess volume that occurs as the joint width shrinks can be easily accommodated in Figure 13.
As shown by F0 and Fi, it acts to escape both inside and outside the joint.

Other embodiments (1) The adhesive parts on both sides of the hollow tube 1 and the sides of the joint groove are made of a material that has good adhesion with the material of the hollow tube 1, such as silica sand, ultra-fine wire, aluminum, etc. Fig. 19-1' is carried out by applying anti-slip material 8. This is because when the joint cross section of the structure 4 has a trapezoidal shape, the liquid material 2 acts as a lubricant when the hollow tube 1 is inserted, and the hollow tube is kept at a predetermined position within the joint. Fixation is inhibited and it slips out of the joint. This embodiment is intended to solve this phenomenon.

(2) The 20th step in which the hollow tube 1 is made into a half shape 9
figure. This embodiment can be used when the depth of the joint in the structure 4 is as shallow as 1 to 2 times the joint width, or when the pressure applied to the joint is small.

(3) Cut the hollow tube 1 into a half shape 9, and apply anti-slip material to both ends of the hollow tube 1 using a material that is compatible with the material of the hollow tube 1, such as silica sand, ultra-fine wire, or aluminum. 21-9' carried out by applying 8. This implementation method can be used when the depth of the joint of the structure 4 is shallow, 1 to 2 times the joint width, and when the joint shape is trapezoidal.

(4) Fig. 22 shows that a sealing method can be implemented by using the bolts 11 and fixing fittings 10 together with joint materials 9 and 9'' shaped like half of the hollow pipe. It can be used when the joint width is relatively wide.Also, as a construction method when there is spring water or water leakage from the joint of the structure 4, as shown in Figure 23-12. If a currently commercially available underwater curing adhesive 12 is used on the bonding surface within the joints of the structure 4, the water stoppage work required by the use of conventional quick-setting agents will be removed, and the drain can be connected directly. While manufacturing, a sealing method with a cross-sectional shape as shown in FIG. 23 can be achieved.

Effects of the invention After curing, the joint material created by the conventional sealing and waterproofing method has
Stress that causes peeling occurs on the entire surface of the adhesive interface due to the expansion and contraction of the structure, but since the structure of the elastic joint material of the present invention is hollow, the stress that occurs is significantly reduced. The waterproofing effect is significantly improved. Since the hollow elastic joint material of the present invention uses a method of inserting and filling a pre-made molded product, it is thought that the rapid reaction change due to curing accelerators, etc., seen in conventional elastic sealants, is the cause. In the early stages of construction, such as cracks and peeling,
The destructive phenomenon is also eliminated.

Furthermore, since the conventional construction method uses auxiliary materials such as backup materials for filling, the filling thickness of the sealant tends to be irregular, which tends to cause variations in adhesive strength. When the structure expands, the backup material closes the inside of the joint, causing excess volume to protrude to the outside of the other open joint, generating a relatively large shearing force. However, since the present invention does not require a backup material, the above-mentioned problems that lead to joint damage do not occur and are all solved.

Furthermore, it is generally well known that a structure having an elliptical shape has a very strong pressure resistance against external pressure. For this reason, the hollow elastic joint material filled in an elliptical shape can effectively form a pressure-resistant joint structure that is sufficient to withstand the internal and external pressures applied to the structure, using a smaller amount than conventional elastic joint materials. I can do it.

Furthermore, although the joint width in an actual structure differs from that on the design drawings and may vary to some extent, the cross-sectional shape of the hollow elastic joint material of the present invention before insertion and filling is circular. As a result, even if there is some variation in the joint width of the structure, it will fit well.

Next, when sealing decorative joints with uneven surfaces such as tiles and bricks, it is difficult to use a finishing joint spatula because the joint edges are uneven.
The construction work required a lot of effort to create a beautiful ceiling line, but by using the hollow elastic joint material of the present invention, we were able to create a beautiful ceiling line while always being able to create a beautiful ceiling line.
Easy to construct. Furthermore, since the present invention does not use backup materials, work efficiency is further improved compared to conventional construction methods.

[Brief explanation of drawings]

FIG. 1 is a partial perspective view, partially in section, before the present invention is implemented. FIG. 2 is a partial perspective view, partially in section, during the implementation of the present invention. FIG. 3 is a partial perspective view, partially in section, after implementing the present invention. FIG. 4 is a perspective view of a succession pipe used in the present invention. FIG. 5 is a fragmented sectional view of FIG. 4. FIG. 6 is a perspective view of a cruciform succession tube used in the present invention. FIG. 7 is a fragmented cross-sectional view of FIG. 6. FIG. 8 is a plan view of FIG. 6. FIG. 9 is a sectional view immediately after implementing the present invention. Figure 10 is an enlarged view of Figure 9. FIG. 11 is a sectional view of the present invention when the structure is contracted. FIG. 12 is an enlarged view of FIG. 11. FIG. 13 is a sectional view of the present invention when the structure is expanded. FIG. 14 is an enlarged view of FIG. 13. Figure 15 is a cross-sectional view of the conventional construction method. Figure 16 is a cross-sectional view of the conventional construction method. Figure 17 is a cross-sectional view of the conventional construction method. Figure 18 is a cross-sectional view of the conventional construction method. FIG. 19 is a partial perspective view, partially in section, of another embodiment. FIG. 20 is a partial perspective view, partially in section, of another embodiment. FIG. 21 is a partial perspective view, partially in section, of another embodiment. FIG. 22 is a partial perspective view, partially in section, of another embodiment. FIG. 23 is a partial perspective view, partially in section, of another embodiment. 1... Rubber elastic hollow pipe joint material, 2... Liquid material that can be applied with a brush, 4... Structure, 8... Anti-slip material, 9
... Joint material having a cross-sectional shape half of 1, 10 ... Fixing fittings, 11 ... Bolts, 12 ... Underwater curing adhesive.

Claims (1)

[Claims] On both sides of the joint of structure 4, hollow pipe 1 and Same material, liquid material with viscosity that can be applied with a brush. 2, it is possible to join with rubber elasticity. Prefabricated material with circular cross-section. Insert the hollow tube 1 into the joint. , occurs after and during insertion of the hollow tube 1. The material 2 is applied and filled into the surface gap. that's all A hollow elastic joint material sheet constructed as shown in Ring waterproofing method.