JPS61122175A - Waterproofing bond for concrete structure - 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 <Industrial Application Field> The present invention relates to waterproof joining of structures having rough or irregular surfaces, such as concrete structures.

<Conventional technology> :,,
Conventionally, when assembling structures such as concrete manhole parts, the common method is to apply an extra amount of fluid adhesive to the joint surfaces of each structure and press the joint surfaces together to join them. He was busy. We found that this method has drawbacks such as easy water intrusion at the bonding surface between the adhesive and the surface of the structure, and as an improvement method, we insert adhesive putty or a fluid adhesive impregnated material into the bonding surface together with the adhesive. This was done by applying pressure and adhesion to prevent leakage.

However, even with these methods, it is not possible to completely prevent leakage at the adhesive surface after the adhesive has hardened. The present invention provides a bonding method that prevents this from occurring.

Measures to solve the problem〉 The adhesive strength of both structures depends on the adhesive on the joint surface (as in the past, but the moisture that has entered the joint surface between the structure surface and the adhesive, etc.) The sealing material is completely waterproof due to the pressure exerted by the swelling of the swellable sealing material.

Effect> The swelling of the swellable sealing material due to the infiltration of moisture produces an even stronger sealing effect, making it possible to achieve a complete seal regardless of the roughness or irregularity of the joint surface.

<Example> Figure 1 is a cross-sectional view showing the shape of the joint surfaces of concrete structures such as manholes and water tanks. The protrusion Ak is provided to facilitate alignment and increase the length of the bonding surface to strengthen the bonding strength. Figure 2 is a cross-sectional view showing the preparation for joining by applying the method of the present invention to the joining surface of Figure 1, in which the necessary amount of fluid adhesive 1 is applied to the groove on the b side all around the entire circumference. Then, a swellable sealing material 2 is placed over the entire circumference of the adhesive 1 so as to be partially buried therein. In this way, they are bonded as shown in FIG. In the same figure, the joint surface is in a normal state, and the convex ridge on the side a fits uniformly into the groove on the side b, and the adhesive 1 spreads uniformly over the joint surface and adheres, and also swells. The adhesive sealing material 2 is also compressed and compressed into a ninety-nine shape on both joint surfaces. The same figure (Bl shows an abnormal state in which the joint surface is irregularly shaped, and the adhesive 1 did not spread over the entire surface. Even in such a case, the swellable sealant 2 is applied to the bottom of the groove. The shape is somewhat crushed due to the pressure between the surface and the top surface of the convex embankment, and the adhesive strength is as shown in the figure (
2) is retained in most normal joints, such as
The sealing is completed as long as the swellable sealing material 2 is held under pressure at the abnormal joint surface as shown in the figure.

<Effects of the Invention> As described above, sealing is performed even if there is an irregularly shaped abnormal joint surface, and even if the entire surface is a normal joint surface, the bond between the adhesive and the structure surface after the adhesive hardens is Even if water infiltrates the gap or the adhesive itself, the swellable sealing material absorbs this infiltrated water and swells, providing sufficient leakage prevention between the joint surfaces of structures a and b. I can do it.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing the shape of the joint surface of a concrete structure, Fig. 2 is a sectional view showing the preparation for joining by implementing the method of the present invention, and Fig. 3 is a sectional view of the t-joint surface bonded by the method of the present invention. In the cross-sectional diagrams shown, (2) is the case of a normal joint surface, (Peng is the case of an abnormal joint surface. 1... Adhesive, 2... Swellable sealant. Answer 1 Arithmetic 22 Jun 3rd

Claims (1)

[Claims] A fluid adhesive is applied to one of the concave grooves on the facing joint surfaces of the concrete structure, and a swellable sealing material is immersed in a semi-immersed manner from the top surface of the adhesive. The other bonding surface having a protrusion that fits into the groove of the bonding surface is pressed, and the adhesive is applied with the sealing material being pressed between the bottom surface of the groove and the top surface of the protrusion. A waterproof joining method for concrete structures characterized by adhesive bonding.