JPH0726674A - Method of waterproofing work of concrete building - Google Patents

Abstract

PURPOSE:To improve durability by a method wherein an inorganic permeable waterproof material is applied, drying and water spray are repeated thrice, and a permeable waterproof protective layer is formed on concrete and the surface of a crack by the reaction of calcium in concrete and water. CONSTITUTION:A method of waterproofing work of a concrete building applies to waterproofing work at the time of the new construction of a concrete body 1 such as the upper section of a roof, a veranda, etc., and the repair work of cracks, etc., generated after the execution of work. The places of objects are cleaned sufficiently, joint 6 sections are removed at the time of repair, and the joints 6 are impregnated or coated sufficiently with the inorganic permeable waterproof material of a sodium-silicate main component. A permeable waterproof protective layer is formed by a reaction with rainwater collecting on the rear side of covering concrete 4 at that time. The inside of a crack 5 is impregnated with calcium and coated and impregnated with the permeable waterproof material previously at the time of the large crack 5, and drying and water spray are repeated thrice, thus forming the permeable waterproof protective layer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproofing method for a concrete rooftop, balcony, shared corridor, parking lot, expressway bridge floor, pit, pool, water tank, water tank, etc.

[0002]

2. Description of the Related Art At present, the following methods are known as waterproofing methods for concrete products.

A. Asphalt waterproofing, urethane waterproofing, asphalt concrete waterproofing, etc., a method of applying a waterproofing material to the surface of concrete to form a film and waterproofing by the action of this film.

B. A method of applying an inorganic permeable waterproof material to the surface.

[0005]

However, the above-mentioned known examples have the following drawbacks.

A. In the construction method of the known example a, the durability is poor and it is necessary to carry out waterproofing work every few years.

B. In the construction method of the known example b, the permeability is weak, and even in this example, it is necessary to carry out waterproofing work every several years.

An object of the present invention is to propose a waterproofing method for a concrete building having excellent durability.

[0009]

[Means for Solving the Problems] The waterproofing method for a concrete building according to the present invention is as follows.

1. Apply or inject an inorganic penetrating waterproofing material containing sodium silicate as a main component at the waterproofing part or repairing part, and after drying, repeat watering several times to permeate the waterproofing material into concrete to form a penetrating waterproof protective layer. Waterproofing method for concrete buildings.

2. Remove the joint seal between the holding concrete stretched on the concrete roof and clean the joint, and apply or inject an inorganic penetrating waterproof material containing sodium silicate as a main component to the joint to hold the concrete. A waterproof method on a concrete rooftop where a waterproof protective layer is formed by reacting with rainwater accumulated on the back side of the concrete, and drying and watering are repeated 3 times.

[0012]

[Function] Waterproofing works are concrete objects such as rooftops, balconies, etc.
It is a repair work for cracks that occurred after construction.

When carrying out waterproofing work, first clean the target area thoroughly so that there are no foreign objects, and avoid excessively high temperatures (for example, 40 ° C or higher) or low temperatures (5 ° C or lower). is there.

The inorganic permeable waterproof material is applied by brush or spray. Also, depending on the repair situation, pressure injection or vacuum injection is carried out, and once dried. Next, a large amount of water is sprinkled on the coated surface. The inorganic permeable waterproof material reacts with calcium and water, which are components of concrete, by this watering, and the water content of the surface of the concrete is 20 to 20%.
Penetrates to a depth of 35 mm to form a permeation waterproof protective layer.
For watering, after the watering in the previous process is completed and the coated surface is dried,
Be sure to repeat 2-3 times. When it rains after construction, the inorganic permeable waterproof material reacts with the rainwater to strengthen the permeable waterproof protective layer. Then, the inorganic permeable waterproof material injected into the cracks, etc. also play an adhesive effect on the concrete when forming the permeable waterproof protective layer, and particularly when mortar repair is performed after waterproofing work, it reacts with the moisture of this mortar. Thus, the permeation-proof protective layer grows in the initial substrate and mortar to enhance the adhesion.

[0015]

【Example】

Example 1 FIG. 1 shows an example of waterproof repair work on a concrete roof,
1 is a concrete frame, 2 is a parapet, 3 is a slab,
Reference numeral 4 is holding concrete, 5 is a crack in the slab 3, and 6 is a joint between the holding concrete 4. When cracks 5 are formed on the concrete roof, conventionally, the pressing concrete 4 is peeled off, the asphalt is applied to the crack 5 portion, and the pressing concrete 4 is stretched again with mortar. 6 parts are removed and cleaned well, and a lot of inorganic permeation waterproofing material (trade name of Radcon 7 Co., Ltd. Environmental Biken Co., Ltd.) is injected into this joint 6. The inorganic permeable waterproof material penetrates through the water to the crack 5 and reacts there. In addition, since there is usually accumulated rainwater on the back side of the pressing concrete 4, this water reacts with the waterproof material. After confirming that the waterproof material that has entered the cracks 5 has reached the slab, wait 5 to 7 hours to confirm that the inorganic permeable waterproof material has dried, and then apply ten-dispersed water to the joint portion 6. Then, after confirming that it has dried after about 24 hours, watering is performed again and the drying is waited. Repeat this watering at least 3 times.
By repeating this sprinkling of water, a reaction layer is formed on the surface of the concrete and the cracks 5, whereby a permeation waterproofing protective layer is formed.

Embodiment 2 In FIG. 2, 1 is a frame, 7 is a veranda, and a common corridor is an example of waterproofing work when a crack 5 is formed in the veranda and the common corridor 7.

In this case, after thoroughly cleaning the surface, the Radcon 7 is sprayed on the crack 5 or applied with a brush, a roller or the like, and when the Radcon 7 is dried, the first watering is performed, and after 24 hours. Do a second watering and repeat 2
After 4 hours, the third watering is performed and the work is completed.

FIG. 3 shows an example of waterproofing work when the crack 5 is large. At this time, a waterproof tape 8 is attached under the crack 5 and calcium 9 is first injected between the cracks 5 and dried.
After injecting Radcon 7 and drying the Radcon 7, the construction is completed by repeating watering three times in the same manner as above.

With water spraying twice, the formation of the permeation waterproof protective layer is not sufficient, and water spraying three times or more is not so effective.
It's a waste of effort and time.

The properties of Radcon 7 are shown in Table 1.

[0021]

[Table 1]

The above embodiments are only a few examples of the present invention, and are not for repairing cracks or the like, but for reinforcement of concrete products such as blocks and fume pipes or reinforcement of concrete roads, levees, etc., and repair of cracks. Can also be applied.

[0023]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, the inorganic permeation waterproofing material is applied or poured and then water is sprinkled to chemically react calcium and water in the concrete, thereby forming the permeation waterproofing protective layer. . As a result, the durability is semi-permanent as compared with the conventional method of only applying or injecting the waterproof material.

[Brief description of drawings]

FIG. 1 is an explanatory view of an example of repair work for a crack that has entered a concrete roof.

[FIG. 2] An explanatory view of an example of repair work for a crack in a shared corridor and a balcony.

FIG. 3 is an explanatory diagram of an example of repair work for a large crack.

[Explanation of symbols]

 1 Concrete skeleton 2 Parapet 3 Concrete slab 4 Holding concrete 5 Crack 6 Joint 7 Veranda, shared corridor 8 Waterproof tape 9 Calcium

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[Procedure amendment]

[Submission date] July 20, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction content]

A. In the construction method of the known example a, cracks and the like occur after several years and there is a problem in durability, so it is necessary to perform waterproofing work every few years.

Claims (5)

[Claims] 1. A waterproof or repaired part is applied or injected with an inorganic permeable waterproof material containing sodium silicate as a main component, and after drying, watering is repeated several times to allow the waterproof material to penetrate into concrete and penetrate and waterproof. Waterproofing method for concrete buildings that form a protective layer. 2. The waterproofing method for a concrete building according to claim 1, wherein after applying or pouring an inorganic permeable waterproofing material and drying it, drying and watering are repeated three times. 3. A joint seal between pressing concrete stretched on a concrete roof is removed to clean the joint portion, and an inorganic permeable waterproof material containing sodium silicate as a main component is applied to the joint portion or A method of waterproofing on a concrete roof where pouring and pressing reacts with rainwater accumulated on the back side of the concrete to form a permeation waterproof protective layer, and drying and watering are repeated three times. 4. The method for waterproofing a concrete building according to claim 1, 2 or 3, wherein Radcon 7 is used as the inorganic permeable waterproof material. 5. In the case of a large crack, calcium is first injected into this crack, and then an inorganic permeable waterproof material is applied or injected, and drying and watering are repeated several times. Construction method for concrete buildings in Japan.