JP2950507B1 - Concrete waterproofing tools - Google Patents

Abstract

An object of the present invention is to provide a concrete water-stopping tool that adheres well to places where the roughness of the latence is severe, and that is not immersed in rainfall or accumulated water but has a risk of a water-stopping agent flowing out. A wrapper (11) made of a synthetic fiber knitted fabric capable of dissolving a water-stopping agent (10) made of bentonite, sepiolite, or other clay-like dry particles or powder that becomes a water-absorbing gel, in alkaline water of concrete. Was sealed almost completely.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete waterproofing tool.

[0002]

2. Description of the Related Art Japanese Patent Application No. 7-115662 proposes a water-stopping device for closing a boundary between a separator of a concrete molding form and its cast concrete and a joint between concrete and the like. This is considered to be the closest approximation to the present invention.

In the prior invention, a water-stopping agent (21) (3) of a highly water-absorbing compound is used as a water-stopping tool for a concrete joint.
1) using an elongated bag of synthetic resin film (20) (30)
4 and 5, and a capsule form in which the same water-stopping agent (11) as a water-stopping tool of the separator (4) is air-tightly filled in a synthetic resin container (10) (FIG. 1, FIG. 2) and the bag (2
0) Both (30) and the container (10) are made of a synthetic resin material that can be decomposed under alkaline conditions.

[0004]

However, regarding the above-mentioned water-stopping device in the form of a string, the elongated bag (20) (3) is required.
Even if 0) is made of a synthetic resin material such as an aliphatic polyester that is hydrolyzed by provisional alkaline water, the above-mentioned bags (20) and (30) are films because of the structural requirements that are limited to such a conceptual description. In addition to the fact that the filling ratio of the waterproofing agents (21) and (31) is not specified in the correlation with this, the bags (20) and (30)
When the water-stopping agents (21) and (31) are filled in a full state, it is difficult to freely bend and deform. Particularly, the waterproofing agent (31) is added to the mesh sheet (32) and the bag (3).
Due to 0), it is impossible to flexibly deform the water-stopping tool having high rigidity (see FIG. 5) which is double-coated.

For this reason, for example, H embedded in concrete
When used in places where the bent surface of the mold steel or other irregularities of the latence are severe, it cannot be adhered well to these places, and unless it is softened by watering, the bag (20) (30) There is a risk of tearing.

The bags (20) and (30) are torn.
When the concrete is left at the construction site for a long time before casting of the post -installed concrete and receives rainfall or immersed in accumulated water during that time, the water blocking agents (21) and (31) quickly swell and gel. Therefore, new water-stopping tools must be re-installed because they are washed away from places where water-stopping is required, thereby impairing the degree of adhesion to the concrete surface .

[0007] The bags (20) and (30) are also damaged when the workers at the site are repeatedly stepped on during installation and use, or when a building material such as steel strikes the bag. In any case, the water stopping effect largely depends on the construction place, construction time, weather conditions and the like.

On the other hand, regarding the water-stopping device in the form of a capsule, since the synthetic resin container (10) is a solid product, it may be damaged when bundled for transportation or storage. Is filled with a water blocking agent (11) in a state of directly touching the separator (4).
It is also difficult to pass this quickly through the separator (4), which means that the container (10) and its lid (10)
Even if the cut (10a) is provided in 1), it will not be solved, but it will be a task of heavy labor.

In order to facilitate the penetration into the separator (4), the filling amount of the waterproofing agent (11) must be reduced, so that the boundary between the separator (4) and the cast concrete is reduced. It is impossible to stop water without shortage, and there is a problem that the stability and reliability of the water stopping effect are also poor.

[0010]

SUMMARY OF THE INVENTION The present invention is intended to improve such problems, and as a water-stopping device for concrete useful for this purpose, bentonite, sepiolite, and other clay-based dry materials which swell and gelate by absorbing water. the waterproofing agent consisting of particles or powder, PH11 in the concrete than
Biodegradable polylactic acid soluble in strong alkaline water
Free from the knitting yarn of the fiber according to the swelling gelation of the water-stop agent
It is characterized in that it is sealed almost completely in the inside of a wrapping bag knitted into a flexible tube form that can be stretched .

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a concrete joint according to a first embodiment of the present invention; FIG. However, the water-stopping device (A) reacts the water-absorbing gelled clay-like dry particles or powdered water-stopping agent (10) with strong alkaline water of concrete without reacting to fresh water such as rainwater or tap water. Thus, it is sealed almost completely in a wrapper (11) made of a knitted fabric of biodegradable synthetic fibers which can be dissolved thereby.

[0012] The water stopping agent (1)
As 0), bentonite or sepiolite may be used alone or separately, or the ratio of bentonite to sepiolite may be from about 50:50 to about 70:30.
Use under mixing.

The physical properties and chemical analysis values of the bentonite used are as shown in Tables 1 and 2 below. According to this, since water absorbs and swells and gels, the water channel is surely closed and stable. A water stopping effect can be achieved.

[0014]

[Table 1]

[0015]

[Table 2]

The physical properties and chemical analysis values of sepiolite (for example, trade name “Aid Plus” of Mizusawa Chemical Industry Co., Ltd.) are as shown in Tables 3 and 4 below.
If it is used as 0), not only fresh water and rainwater absorbed by the bentonite but also its three-dimensional chain-like tunnel structure (crystal structure) absorbs and gelates seawater (salt) and oil, etc. Therefore, the waterway can be closed, which is useful as a waterproofing agent (10) for use in landfills especially on the seaside.

[0017]

[Table 3]

[0018]

[Table 4]

On the other hand, as synthetic fibers used for the material of the wrapper (11), biodegradable polylactic acid fibers which are not dissolved by neutral water of PH7 but are dissolved by strong alkaline water of PH11 or more. (For example, the product name “Lactron” of Kanebo Synthetic Fiber Co., Ltd.), heat-fusible polylactic acid fiber obtained by blending a natural polymer polysaccharide and a plasticizer with starch as a main component is preferable.

After knitting (warp knitting) to a diameter (D) of about 10 to 17 mm from the knitting yarn of the biodegradable polylactic acid fiber, the length (L) of about 2 to 5 m is obtained. By cutting, one end (12) of the opening of the wrapper (11) is obtained as a seamless wrapper (11) in the form of a tube.
a) is sealed first, and then the water-stopping agent (10) is almost completely filled (about 90% or more) from the other end (12b) of the opening.
And finally sealing the other end (12b) of the opening.

As a means for sealing the wrapper (11), in addition to heat sealing, a separate fixing device (13) such as an adhesive, a binding wire, a stopper, or the like can be used. (10)
Can be freely selected as a filling method, but it is effective for mass production to blow into the inside of the wrapper (11) by a wind force such as a blower based on the fact that this is a dry particle or powder. It can be said.

In any case, since the wrapper (11) is made of a knitted fabric, the loop of the knitting yarn forming the wrapper (11) freely deforms, resulting in its elasticity and flexibility. The water-stopping tool of the present invention can adhere to the bent surface of the H-shaped steel to be embedded and other places where the irregularities of the latencies are severe, so that the water-stopping tool of the present invention can be adhered to the surface, and the stability of the water-stopping effect can be maintained. And excellent in reliability. For this purpose, it is also useful that the water stopping agent (10) is particles or powder in a dry state.

[0023] In this respect, although the wrapping as the woven fabric is crossed with the warp and the weft, it is inferior in elasticity and flexibility even though it is made of the same polylactic acid fiber. When the liquid medicine is filled in a full state, it becomes a whole hard rod state, it can not be freely bent and deformed,
In addition to the possibility of tearing , the swelling gel of the water stopping agent
Swelling gelation is prevented because
Result.

In the case of a wrapper made of a non-woven fabric of the same polylactic acid fiber, it is difficult to finish the thickness and strength of the wrapper uniformly, so that the wrapper is forcibly bent and deformed or repeatedly trampled at a location with severe unevenness. Or, when it collides with a building material such as steel, it ruptures from its thin and weak part, and the water stopping agent leaks out.

The wrapping bag (11) of the present invention is made of a highly elastic knitted fabric, and has a water-stopping agent (10) almost completely filled therein. There is no danger of leaking out and reducing the weight.
m can be formed relatively thin as the diameter (D), but if the diameter is smaller than about 10 mm, the provisional waterproofing agent
Also thickens the swelled gel of (10), there is Ruosore still results in lack of water stopping effect, if it is larger diameter than about 17mm Conversely, still subject to swelling effect of water-stopping agent (10)
The reason for this is that it is considered to be an excessive foreign substance (impurity) to be embedded in concrete, and gives a sense of resistance to its use.

Furthermore, also the reason for cutting the length of the file wrapper (11) to (L) to about 2~5m is used to the greatest common divisor or versatile as concrete joints of waterproof device (A) is for that way, and the length (L) is shorter than about 2m, frequently joining foot and must be used, and longer than about 5m to the contrary, the construction site is 1 worker This is because it is not possible to conveniently handle and transport the equipment.

Next, FIGS. 3 and 4 show a concrete molding formwork.
(M) separator (15) and its casting concrete
Of the present invention suitable for stopping water at the boundary with
According to the second embodiment, this is the water stoppage of the first embodiment.
That allows the tool (A) to pass through the separator (15)
It is rolled into a donut shape.

That is, the water stopping device of the second embodiment
(B) is a knitting yarn of the biodegradable polylactic acid fiber due to its constitution .
With a constant diameter (D) and length (L)
The waterproofing agent (1)
0) is also almost completely filled, and then the wrapper (1)
1) One end of the opening (12a) and the other end of the opening (12b)
Butt or overlap, heat-sealing or bonding
And the center is inserted into the separator (15)
Donut form that will be opened as a mouth (16)
Present.

Such a donut-shaped water stopping device (B)
Then, one end (12a) of the opening and the other end (12
b) in an internal communication state. The through hole (16)
Is the same as the diameter of the separator (15),
Or, reduce the size by the amount of expansion and contraction of the wrapper (11).
The separator (15)
As close as possible to the circumferential surface of the lens.

According to the water stopping tool (B) of the second embodiment.
If the wrapper (11) is a knitting that is also rich in elasticity and flexibility
Separate concrete formwork (M) because it is made of cloth
Gently and lightly
And, of course, during transport
Even if bundled for storage, there is no risk of damage.
No.

The water-stopping tool (A) of the first and second embodiments.
In (B), the wrapper (11) has strong alkaline water.
If dissolution occurs too quickly due to
Polyester, nylon, vinylon, etc. in the knitted fabric
Of synthetic fibers that cannot be dissolved in alkaline water
And by knitting the zipper (11),
The dissolution rate may be adjusted. The mixing ratio is
Approximately 1/10 of the knitted fabric of polylactic acid fiber
Preferably.

The water stopping tool (A) of the first and second embodiments is
In use, it is obvious from various use examples of FIGS.
As shown, this is connected with concrete (C1) (C2)
Installed along the part to supplement the existing concrete (C1)
Tighten to the reinforcing steel bar (17) with a binding wire ( 18)
Fixed and subsequently installed concrete (C2)
At the seam (P) between
One.

Transfer of the above concrete (C1) (C2)
When the ridge forms a vertical surface or ceiling as shown in Figs.
Is the connection of the waterproofing device (A) to the reinforcing steel (17).
In addition to bundles, spindle studs on the vertical or ceiling surface
(19) is fixedly installed and its spindle stud (1)
9) Insert or tie the water stop device (A) to the needle,
Separate saddle band (20) for vertical and ceiling surfaces
More pressing or pasting with adhesive
Thus, the water stopping tool (A) is positioned and fixed stably.

When installing and using the above water stopping device (A),
Should there be a shortage in the length (L), add this
Then, a plurality of the extension portions (X) adjacent to each other are connected with a binding wire or the like.
Clasps, hook-and-loop fasteners (so-called magic tapes)
Loops or Velcro fasteners) or other suitable fasteners
Fix by (21).

In particular, the surface fastener is used as the fastener (21).
Fasteners, and also the above biodegradable poly
Made from lactic acid fiber, one end of the wrapper (11) or
It is desirable to be attached and integrated in advance at both ends.

The water-stopping tool (A) is an existing concrete
(C1) and retrofitting concrete (C
In the state of use interposed at the joint (P) with 2),
(11) included in concrete (C1) (C2)
Dissolves over time in response to strong alkaline water
Water-stopping agent (bentonite) that absorbed the water
(10) is about 20 times larger than the initial dry particle state
It becomes a swelling gel, and the seam (P)
Closes as in 9, 10 to achieve its reliable water stopping action
It is.

In addition, the water wrapper (1)
1) is made of a knitted fabric which is rich in elasticity and flexibility .
Of H-shaped steel (22) embedded in concrete such as
It can be freely wound and used on curved surfaces.
And can follow places with severe roughness
Then, in order to familiarize and adhere closely,
With the waterproofing agent (10) that is almost completely filled in the head
Thus, a complete water stopping effect can be achieved.

On the other hand, the water-stopping tool (B) of the second embodiment.
When using a concrete formwork (M)
Prior to assembly, as shown in FIGS.
The water stoppage tool (B) may be passed through the heater (15).

Then, it is driven into the form (M).
The strong alkaline water of the concrete (C)
When the wrapper (11) of the water stopping device (B) dissolves with time,
In addition, the water-stopping agent (bentonite) (1)
0) is greatly swollen and gelled, and the separation
Close the boundary between the concrete (15) and the cast concrete (C)
It closes and completes its water-stopping action. FIG.
The reference numeral (23) indicates the opposite one forming the formwork (M).
A pair of weir plates, (24) screws on both ends of the separator (15)
Form tie fastened to the part, (25) indicates a cone
ing.

The water stopping device (A) of the first embodiment is
During installation on existing concrete (C1), it should be retrofitted
Release at construction site for a long time before concrete (C2) is cast
During this time, rainfall or accumulation
Water-absorbing agent that absorbs when immersed in water
(Bentonite) Assuming that (10) starts to swell and gel
The wrapper (11) enclosing this is a highly elastic knitted fabric.
Swelling gelation of the water stopping agent (10)
Without blocking, it adapts itself to 360 degrees
The existing concrete (C
1) Can achieve primary water stopping action in close contact with the surface
You.

Moreover, the wrapper (11) is made of rainwater or tap water.
Is not dissolved by fresh water such as
Even if it is difficult to dissolve, the leakage of the water stopping agent (10)
There is no fear that washed away out, and even the left during the in situ work
Building materials such as steel, etc.
Even if it hits, it does not break easily due to the expansion and contraction action
Then, it was necessary to re-install the water stoppage tools (A) and (B).
Absent.

In short, the water-stopping tools (A) and (B) of the present invention
Takes a long time to pour concrete at the construction site
Even if left untouched, there is no hindrance and its water stopping effect
Depends on construction location, construction time, weather conditions, etc.
It is not right.

Then, to the existing concrete (C1)
When the retrofitting concrete (C2) is continuously poured,
Cast concrete (C2) began to harden over time
Water from the joint (P) with the existing concrete (C1)
Of concrete (C2)
Wrapper (11) that received strong alkaline water dissolved over time
As a result, the water-stopping agent (10) is in a so-called naked state.
Swells and gels more and more freely.
(C1) and the joint of the retrofitting concrete (C2)
(P) is completely occluded, and its stable and reliable secondary water stopping effect
The fruits can be achieved.

In particular, concrete structures in seaside landfills
In the case of constructing a roof, stop the water stoppage tools (A) and (B)
Sepiolite is used as the liquid agent (10),
Then this absorbs seawater (salt) and oil and gels,
Because it has dry consolidation properties, it is the same as concrete
(C1) (C2), including the joint, concrete molding
(15) and its casting concrete
Even the boundary with the REIT (C), etc.
It can be expected to have a deodorizing effect.

Incidentally, depending on the construction site of the concrete structure
Is a water stoppage that mixes the bentonite and sepiolite.
As mentioned above, the agent (10) may be used.
You.

[0046]

As described above, the concrete concrete according to the present invention
Swelling gel by water absorption
Bentonite, sepiolite, and other clayey debris
Water-stopping agent (10) consisting of particles or powder
Soluble in strong alkaline water of pH 11 or higher
From the biodegradable polylactic acid fiber knitting yarn,
A flexible tube which can be freely extended in response to the swelling gelation of 0)
Almost full inside the wrapper (11) wrapped in a tube shape
Since it is sealed in a cup,
This has the effect of improving all problems.

That is, according to the above configuration of the present invention, the stopping
The water-stopping agent (10) of the water utensil (A) (B) turns into a water-absorbing gel.
Bentonite, sepiolite and other dry clay particles
Or a zipper made of powder and enclosing it (11)
Is a biodegradable polylactic acid fiber knitted yarn and its water-blocking agent (1
0) A flexible material that can be freely stretched in response to the swelling gelation
Because it is knitted in a tube form,
In (11), the water-stopping agent (10) is filled almost completely.
However, it can be freely bent and deformed.

As a result, Leytan in concrete
Buried in concrete, as well as where there are severe irregularities
This also applies to the curved surface of the H-beam (22)
Water-stopping equipment (A) so that they can follow these without difficulty
(B) can be installed and used in a stable and close contact state at all times
Because of its installation and use of concrete surface special
It is not necessary to perform the work of leveling the ground.

The wrapper (11) is made of concrete.
Can be dissolved by receiving strong alkaline water of pH 11 or higher
From the knitting yarn of the biodegradable polylactic acid fiber, the swelling of the waterproofing agent (10) is performed.
A flexible tube that can be freely stretched to adapt to gelation
Because it is knitted in a tubular shape, the existing concrete (C
Installation in 1) In use condition, retrofit concrete
Long time left at construction site until (C2) is cast
Or repeatedly immersed in the accumulated water
If water is absorbed, water is absorbed through the wrapper (11).
The agent (10) swells and gels, and this is encapsulated.
The wrapper (11) is made of fresh water such as rainwater or accumulated water.
And does not dissolve by this, so the water stopping agent (1
0), there is no risk of leakage and loss.
1) is a swelling gel that expands according to the swelling gelation of the water-stopping agent (10).
As a result, the water-stopping agent (10) that has freely swollen and gelled is
Primary water stoppage in close contact with the surface of existing concrete (C1)
It can be used for
Installed underwater, not affected by weather conditions or weather conditions
There are conveniences that can be used.

Then, to the existing concrete (C1)
After installation of the concrete,
When (C2) is cast, the cast concrete (C2)
2) Envelope (11) which received strong alkaline water over time
It dissolves and the water blocking agent (10) becomes naked, so to speak.
Because it will swell more and more
Existing concrete (C1) and retrofit concrete (C
2) The seam (P) is reliably closed and its stable secondary
Water stoppage effect can be achieved.

The wrapper (11) is made of a biodegradable polylactic acid fiber
Formed from the knitting yarn of
In the unlikely event that lukari water runs short, the wrapper (11)
Even if it remains buried in concrete, its biodegradability
It helps to get it.

Further, if the configuration of claim 2 is adopted, 1
Even human workers can handle it conveniently at the construction site
Effect that does not give a lack of water stopping effect or resistance in use
There is.

Further, if the configuration of claim 3 is adopted,
Through-hole (16) opening to the center of the donut shape
The water-stopping tool (B) by the concrete forming form
Pass it through the separator (15) of (M) easily and lightly
Can be inserted into the
Between the separator (15) and the cast concrete (C)
In addition to being able to reliably and stably stop water at the boundary,
It is also convenient for on-site handling and carrying.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is a schematic front view showing a second embodiment of the present invention.
You.

FIG. 4 is a sectional view taken along line 4-4 of FIG . 3;

FIG. 5: Transfer of the water stoppage tool of the first embodiment to concrete
It is sectional drawing in the state installed and used in the part (plane).

[Fig. 6] Also installed on a concrete joint (vertical surface)
It is sectional drawing of the state used.

[Fig. 7] Also installed at the joint (right-angled surface) of concrete
It is sectional drawing of the state used.

[Fig. 8] Also installed at the joint of concrete (ceiling surface)
It is sectional drawing of the state used.

FIG. 9 shows concrete pouring by the water stopping tool of the first embodiment .
It is an expanded sectional view which shows the water stop state of a joint part.

FIG. 10 is a sectional view taken along line 10-10 of FIG . 9;

FIG. 11 Wraps the water stopping tool of the first embodiment around an H-shaped steel.
It is a slope view of the used state.

FIG. 12 shows the water stoppage tool of the second embodiment passed through a separator.
It is sectional drawing of the use condition which was sunk.

13 is an enlarged sectional view taken along line 13-13 of FIG.
You.

[Explanation of symbols]

 (10) ・ water stopping agent (11) ・ wrapper (12a) ・ one end of opening (12b) ・ other end of opening (13) ・ fixing tool (A) ・ water stopping tool (B) ・ water stopping tool (D ) ・ Diameter (L) ・ Length

Claims (3)

(57) [Claims] 1. A bentonite and sepiolite swelled gel by water absorption, and other clay dry particles or waterproofing agent comprising powder (10), the PH11 or more strong alkaline water in the concrete
From the more soluble biodegradable polylactic acid fiber knitting yarn,
It can be freely stretched according to the swelling gelation of the water stopping agent (10)
A concrete water-stopping device characterized in that it is enclosed almost completely in a wrapping bag (11) knitted into a flexible tube . 2. The diameter (D) of the wrapper (11) is about 10-17.
The concrete waterproofing tool according to claim 1 , wherein the length (L) is set to about 2 to 5 m . 3. A wrapping bag (11) knitted in a tube form.
Is filled almost completely with a waterproofing agent (10), and one end (12a) of an opening of the wrapper (11 ) is opened.
By heat-sealing or bonding with the other end (12b) ,
A door whose center is opened as a through hole (16)
The concrete waterproofing tool according to claim 1, wherein the tool is wound into a dough shape .