JP2014163189A - Waterproof member for floor slab, floor slab waterproof structure, and construction method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproof member for a floor slab, which enables a floor slab waterproof structure to be constructed in a short period of time.SOLUTION: A waterproof member 4 for a floor slab is provided between the floor slab 1 and an asphalt pavement body 3. In the waterproof member 4 for the floor slab, a thermoplastic resin fiber sheet 5 being a woven or nonwoven fabric containing a thermoplastic resin with a softening point of 110°C or higher, and a thermoplastic resin sheet 6 containing a thermoplastic resin with a softening point of 150°C or lower are superposed on each other and integrated together.

Description

  The present invention relates to a floor slab waterproof member, a floor slab waterproof structure provided with the floor slab waterproof member, and a construction method of the floor slab waterproof structure.

  In recent years, concrete floor slabs such as bridges are said to have a problem of deterioration cracks due to intrusion of moisture such as rainwater. Therefore, a floor slab waterproof structure in which an asphalt pavement material is provided on the floor slab via a waterproof layer is generally used. Conventionally, it has been common to use the same asphalt type as the paving material as the waterproof layer. In this case, the pavement material and the waterproof layer are the same type of asphalt material, and there is an advantage that both have good adhesion. However, it is said that the asphalt waterproof layer has a problem in durability.

Therefore, a resin coating formed by applying a thermosetting resin that maintains strength at high temperatures (over 50 ° C) while maintaining elasticity at low temperatures (below -30 ° C) as a waterproof layer that replaces asphalt waterproof layers. Waterproof layers are attracting attention. However, the resin coating waterproof layer has problems such as insufficient bondability with the asphalt pavement and poor workability when providing an adhesive layer for bonding with the asphalt pavement. It was.
For example, as a method of using the above conventional resin film waterproof layer, in order to join a resin film waterproof layer containing a urethane resin and an asphalt pavement, thermoplastic resin powder or pellets are used for the resin film waterproof layer. Attempts have been made to spread on the surface. However, when trucks and finishers run on the surface to lay asphalt pavement, the thermoplastic resin is scattered and biased, making it difficult to uniformly disperse the thermoplastic resin on the surface, resulting in a resin coating waterproof layer And the asphalt pavement were not sufficiently joined together.

  In the technique described in Patent Document 1 below, the above-described problem is solved by providing an adhesive layer using a specific thermoplastic resin sheet in the joining of the resin coating waterproof layer and the asphalt pavement. ing. That is, the technique described in the following Patent Document 1 is a floor slab waterproof structure in which a resin coating waterproof material layer and an asphalt pavement are laminated on a floor slab such as a bridge. And the asphalt pavement are joined via a specific thermoplastic resin sheet.

Japanese Patent No. 3956757

In the technique described in Patent Document 1, an adhesive such as urethane resin is thinly applied on a resin coating waterproof layer (urethane waterproof layer) containing urethane resin, and EVA (ethylene vinyl acetate copolymer) is applied. ) Based thermoplastic resin sheet (see paragraph 0010 of Patent Document 1).
A conventional general floor slab waterproof structure using a urethane waterproof layer has a structure in which a primer resin layer, a urethane waterproof layer, a urethane resin adhesive layer, and an EVA thermoplastic resin sheet are sequentially laminated. In such a conventional floor slab waterproof structure, after forming a primer resin layer and a urethane waterproof layer, a main component / curing agent (isocyanate / polyol) of a urethane resin adhesive is mixed on a construction site, and this is used as a roller. Apply thinly and evenly with a brush, etc., and spread and apply a thermoplastic resin sheet. The formation of the primer resin layer (curing (drying) the primer) took about 1 hour in the winter, and it took 2-3 hours or more to cure (dry) the urethane resin adhesive. That is, the conventional construction method for floor slab waterproof structure has many steps and requires a lot of time for curing (drying) and curing of adhesives and the like.
On the other hand, pavement of road bridges in service and repair work of waterproof layers generally need to be performed within a short road regulation time (8-10 hours at night). Since the conventional floor slab waterproof structure as described above takes too much time to construct, it is not suitable for such repair work that should be performed in a short time.

  Then, this invention makes it a subject to provide the waterproof member for floor slabs which enables construction of a floor slab waterproof structure in a short time. Moreover, the floor slab waterproof structure provided with this floor slab waterproof member and the construction method of this floor slab waterproof structure are provided.

  A first aspect of the present invention is a waterproof material for floor slabs provided between a floor slab and an asphalt pavement, wherein the thermoplastic is a woven or non-woven fabric containing a thermoplastic resin having a softening point of 110 ° C. or higher. A floor slab waterproofing member in which a resin fiber sheet and a thermoplastic resin sheet containing a thermoplastic resin having a softening point of 150 ° C. or lower are laminated and integrated.

  In the floor slab waterproofing member according to the first aspect of the present invention, the thermoplastic resin fiber sheet preferably has a tensile elongation of 20% or more at room temperature (5 ° C. or more and 35 ° C. or less).

  The floor slab waterproofing member according to the first aspect of the present invention preferably has a vent hole penetrating in the thickness direction.

  A second aspect of the present invention is a floor slab waterproof structure provided on a floor slab, and is a thermosetting resin containing at least one of an epoxy resin, an acrylic resin, and a urethane resin formed on the floor slab A floor slab waterproofing member according to the first aspect of the present invention, wherein the floor slab waterproofing member has a thermoplastic resin fiber sheet as a thermosetting resin layer. The floor slab waterproof structure is laid on the thermosetting resin layer so as to be in contact with each other, and at least a part of the thermosetting resin constituting the thermosetting resin layer is impregnated in the thermoplastic resin fiber sheet.

  In the floor slab waterproofing structure according to the second aspect of the present invention, it is preferable that an asphalt pavement is laid on a thermoplastic resin sheet.

  A third aspect of the present invention is a construction method of a floor slab waterproof structure provided on a floor slab, wherein a thermosetting resin containing at least one of epoxy resin, acrylic resin or urethane resin is applied to the floor slab or Before the thermosetting resin is cured, the thermoplastic resin fiber sheet is impregnated with at least a part of the thermosetting resin of the waterproofing member for floor slabs according to the first aspect of the present invention. The floor slab waterproofing construction method has a step of laying in such a manner and a step of laying an asphalt pavement on a thermoplastic resin sheet.

  According to the present invention, a floor slab waterproof structure can be constructed in a short time.

It is sectional drawing explaining the floor slab waterproofing structure. It is a figure explaining the method of a tension adhesion test.

  The above-mentioned operation and gain of the present invention will be clarified from embodiments for carrying out the invention described below. Hereinafter, the present invention will be described based on embodiments shown in the drawings. However, the present invention is not limited to the embodiment. In addition, the figure shown below shows the structure schematically and does not show the magnitude | size and shape of each component accurately.

1. 1 is a cross-sectional view schematically showing a floor slab waterproofing structure 10 which is an example of the floor slab waterproofing structure of the present invention. As shown in FIG. 1, the floor slab waterproofing structure 10 includes a floor slab 1, a thermosetting resin layer 2, a floor slab waterproofing member 4, and an asphalt pavement 3. The floor slab waterproofing member 4 includes a thermoplastic resin fiber sheet 5 and a thermoplastic resin sheet 6.
Hereinafter, these components constituting the floor slab waterproofing structure 10 will be described.

(Floor 1)
The floor slab 1 is a floor slab such as a road or a bridge. The material which comprises the floor slab 1 is not specifically limited. Examples of the material constituting the floor slab 1 include concrete and steel, and there is also a composite of concrete and steel.

(Thermosetting resin layer 2)
The thermosetting resin layer 2 is a layer made of a thermosetting resin containing at least one of epoxy resin, acrylic resin, or urethane resin (urea resin, urethane resin, urea urethane resin, etc.). The thermosetting resin layer 2 has a function as a primer layer formed on the floor slab 1 and also has a function as a prevention layer for suppressing water from entering the floor slab 1 from the asphalt pavement 3 side. .

  The thermosetting resin layer 2 is preferably flexible so that it can follow cracks and vibrations (deflection) of the floor slab 1. Moreover, in order to shorten the construction time of the floor slab waterproofing structure 10, the thermosetting resin which comprises the thermosetting resin layer 2 should harden | cure in a short time (for example, about 30 minutes or more and 2 hours or less). Is preferred.

The thermosetting resin layer 2 can be formed by applying or spreading a thermosetting resin on the floor slab 1. The method for applying the thermosetting resin is not particularly limited, and examples thereof include spray coating, roller brush coating, and brush coating. The amount of applying the thermosetting resin, for example, 0.3 kg / ^{m 2} or more 2.0 kg / ^{m 2} can be less, on the order 0.8 kg / ^{m 2} or more 1.5 kg / ^{m 2} or less Preferably there is. By setting the coating amount of the thermosetting resin to be equal to or more than the lower limit of the above range, it is easy to sufficiently adhere to the floor slab waterproofing member 4 and to easily impregnate the thermoplastic resin fiber sheet 5 with the thermosetting resin. On the other hand, by making it below the upper limit of the said range, it can suppress that manufacturing cost becomes high excessively.

(Waterproof member 4 for floor slab)
The waterproofing member 4 for floor slab is impregnated with at least a part of the thermosetting resin constituting the thermosetting resin layer 2 and cured integrally, so that water is transferred from the asphalt pavement 3 side to the floor slab 1. It is a member that can suppress intrusion and can be adhered to the thermosetting resin layer 2 and the asphalt pavement 3. The waterproofing member 4 for floor slabs is provided between the floor slab 1 and the asphalt pavement 3, and the thermoplastic resin fiber sheet 5 and the thermoplastic resin sheet 6 are laminated and integrated.
The method for laminating the thermoplastic resin fiber sheet 5 and the thermoplastic resin sheet 6 is not particularly limited. As a method of laminating the thermoplastic resin fiber sheet 5 and the thermoplastic resin sheet 6, for example, a method of applying a thermoplastic resin constituting the thermoplastic resin sheet 6 to the thermoplastic resin fiber sheet 5, or a thermoplastic resin fiber There is a method in which the sheet 5 and the thermoplastic resin sheet 6 are separately manufactured and then both are stacked and heat-welded.

  The waterproof member 4 for floor slabs is laid on the thermosetting resin layer 2 so that the thermoplastic resin fiber sheet 5 is in contact with the thermosetting resin layer 2, and the thermosetting resin constituting the thermosetting resin layer 2. At least a part of the resin is impregnated in the thermoplastic resin fiber sheet 5. In this way, the thermoplastic resin fiber sheet 5 is impregnated with the thermosetting resin and cured, so that the thermoplastic resin fiber sheet 5 is not easily damaged. Sometimes referred to as “layer”.) The asphalt pavement 3 laid on the floor slab waterproofing member 4 may have a sharp portion, but by making the thermoplastic resin fiber sheet 5 as a strong FRP waterproof layer as described above, It can suppress that a waterproof layer is destroyed by the asphalt pavement 3.

  The thermoplastic resin fiber sheet 5 is a woven or non-woven fabric containing a thermoplastic resin. From the viewpoint of facilitating the impregnation of the thermosetting resin as described above, the thermoplastic resin fiber sheet 5 may be a woven fabric. preferable.

  The thermoplastic resin fiber sheet 5 is preferably integrated with the thermosetting resin layer 2 to constitute a flexible FRP waterproof layer. Therefore, the tensile elongation at normal temperature of the thermoplastic resin fiber sheet 5 is preferably 20% or more, and more preferably 50% or more.

  Further, in order to prevent the thermoplastic resin fiber sheet 5 from being melted by heat when laying the asphalt pavement 3, the softening point of the thermoplastic resin constituting the thermoplastic resin fiber sheet 5 is 110 ° C. or more, Preferably it is 140 degreeC or more, More preferably, it is 180 degreeC or more.

  Examples of the thermoplastic resin constituting such a thermoplastic resin fiber sheet 5 include polyethylene terephthalate (PET), polypropylene (PP), polyethylene (PE), polyester, and the like. It is preferable to do.

The thermoplastic resin fiber sheet 5 preferably has a basis weight (unit weight) of 0.4 kg / m ² or more and a thickness of 0.6 mm or more, for example. By forming the thermoplastic resin fiber sheet 5 to be thick to some extent as described above, it is possible to prevent the asphalt pavement 3 from being broken when it is laid (having holes and lowering the waterproof property).

  On the other hand, the thermoplastic resin sheet 6 can be firmly adhered to the thermoplastic resin fiber sheet 5 and the asphalt pavement 3 by self-adhesion or once melted by heating and then cured. The FRP waterproof layer (thermoplastic resin fiber sheet 5) and the asphalt pavement 3 configured as described above are joined via the thermoplastic resin sheet 6.

At least a part of the thermoplastic resin sheet 6 is once melted by heat when the asphalt pavement 3 is laid, and penetrates into the asphalt pavement 3 to be solidified to be firmly bonded to the asphalt pavement 3. It is preferable. Thus, since it is preferable that at least a part of the thermoplastic resin sheet 6 is melted and bonded to the asphalt pavement 3 by heat when the asphalt pavement 3 is laid, the thermoplastic resin constituting the thermoplastic resin sheet 6 is used. The softening point of the resin is preferably 150 ° C. or less, more preferably 110 ° C. or less, and further preferably 90 ° C. or less.
Moreover, it is preferable that the softening point of the thermoplastic resin which comprises the thermoplastic resin sheet 6 is 50 degreeC or more, It is more preferable that it is 60 degreeC or more, It is further more preferable that it is 70 degreeC or more. By setting the softening point of the thermoplastic resin constituting the thermoplastic resin sheet 6 to 50 ° C. or higher, the thermoplastic resin sheet is used for tires of machines (asphalt finishers, dump trucks, etc.) for paving asphalt pavement 3 particularly in summer. It can suppress that 6 melts and gets stuck.

  The present inventor has described that a specific polyamide resin or EVA (ethylene-vinyl acetate copolymer) resin is a thermoplastic resin fiber sheet whose main component is PET (or polyester, etc.), urethane resin, acrylic resin, epoxy resin, etc. It was found that it adheres firmly to the thermosetting resin and melt-adheres with the asphalt pavement. Accordingly, the thermoplastic resin constituting the thermoplastic resin sheet 6 preferably includes a polyamide resin or EVA resin having a high VA (vinyl acetate) content (30% or more), and particularly preferably includes a polyamide resin.

The thermoplastic resin sheet 6, for example, 0.3 kg / ^{m 2} or more 0.8 kg / ^{m 2} or less of basis weight, the thickness may be of the order or 1.5mm or less 0.5 mm. By setting the basis weight to be equal to or higher than the lower limit of the above range, the tensile strength of the thermoplastic resin sheet 6 can be easily secured. In addition, by making the basis weight below the upper limit of the above range, it is possible to prevent the manufacturing cost from becoming excessively high, and the thermoplastic resin sheet 6 can be easily melted by the heat when the asphalt pavement 3 is laid. It becomes easy to increase the adhesive strength with the asphalt pavement 3.

  The floor slab waterproofing member 4 preferably has a vent hole penetrating in the thickness direction. The vent hole preferably has a hole diameter of 0.01 mm to 2 mm, more preferably 0.1 mm to 1 mm. Moreover, it is preferable that the said air vent is provided at substantially equal intervals at intervals of 0.5 cm or more and 5 cm or less. By providing such vent holes in the floor slab waterproofing member 4, it becomes easy to suppress the bubbles from remaining between the floor slab waterproofing member 4 and the thermosetting resin layer 2.

As described above, the floor slab waterproofing member 4 constitutes a waterproof layer and can easily and firmly adhere to the thermosetting resin layer 2 and the asphalt pavement 3. Immediately after applying or spraying the thermosetting resin constituting the thermosetting resin layer 2 on the floor slab 1 by preparing such a floor slab waterproofing member 4 at a factory or the like in advance, By laying the floor slab waterproofing member 4 and laying the asphalt pavement 3, the durability of the floor slab 1, the thermosetting resin layer 2, the floor slab waterproofing member 4, and the asphalt pavement 3 is firmly bonded. Therefore, the high-performance floor slab waterproofing structure 10 can be constructed in a short time. Therefore, the waterproofing member for floor slabs of the present invention is suitable when it is necessary to perform construction in a short period of time such as renovation work.
In the construction of floor slab prevention structure using conventional general resin film waterproof material (primer, resin film waterproof layer, pavement adhesive layer), at least 4 hours in total to cure (dry) each layer It was necessary. On the other hand, when the floor slab waterproofing member 4 is used, the floor slab waterproofing member 4 is laid immediately after the thermosetting resin constituting the thermosetting resin layer 2 is applied or sprayed on the floor slab 1. The asphalt pavement 3 can be laid immediately after the curable resin layer 2 is cured (usually requiring a time of about 30 minutes to 2 hours).

(Asphalt pavement 3)
The asphalt pavement 3 is laid on the thermoplastic resin sheet 6. As the asphalt pavement 3, a conventional asphalt pavement can be used without any particular limitation. The asphalt pavement 3 can be laid to a thickness of about 40 mm or more and 200 mm or less, for example. Also, the asphalt pavement 3 can be laid by heating and rolling at, for example, a temperature of 110 ° C. or higher, 130 ° C. or higher, or 180 ° C. or higher, although it varies depending on the environment and construction materials during construction. At this time, at least a part of the thermoplastic resin sheet 6 below the asphalt pavement 3 is temporarily melted and penetrated into the asphalt pavement 3 to be cured, so that the thermoplastic resin sheet 6 and the asphalt pavement 3 Can be firmly bonded.

2. Next, the construction method of the floor slab waterproof structure of the present invention will be described by taking the construction method of the floor slab waterproof structure 10 described above as an example.

  The floor slab waterproofing structure 10 can be constructed by sequentially laminating the thermosetting resin layer 2, the floor slab waterproofing member 4, and the asphalt pavement 3 on the floor slab 1.

The thermosetting resin layer 2 can be formed by applying or spraying the thermosetting resin constituting the thermosetting resin layer 2 described above on the surface of the floor slab 1. Thermosetting resin layer 2, spray coating, roller brush coating, such as by brush coating, for example, 0.30 kg / ^{m 2} or more 2.0 kg / ^{m 2} or less, preferably 0.80 kg / ^{m 2} or more 1.5 kg / m ^It can be formed by applying the thermosetting resin to the surface of the floor slab 1 at about ² or less.
When forming the thermosetting resin layer 2, before applying or spraying the thermosetting resin, from the surface of the floor slab 1, a fragile layer such as concrete latency, foreign matter such as oil, and the previous in the repair floor slab It is preferable to remove the waterproof layer etc. cleanly. In such a case, it is preferable that the surface of the floor slab 1 is subjected to shot blasting as necessary after polishing, cleaning, washing, and drying.

  Moreover, it is preferable that the thermosetting resin layer 2 makes the cutting unevenness, a defect part, etc. in a repair floor slab etc. smooth. Examples of such a method include a method of previously mixing aggregate such as cinnabar sand with the composition constituting the thermosetting resin layer 2 to repair the uneven portion, and the thermosetting resin constituting the thermosetting resin layer 2. There is a method of spraying an aggregate such as cinnabar from above and applying a thermosetting resin constituting the thermosetting resin layer 2 thereon. By forming the thermosetting resin layer 2 as flat as possible in this way, it becomes easy to suppress the air from remaining between the thermosetting resin layer 2 and the thermoplastic resin fiber sheet 5.

  After applying or spraying the thermosetting resin as described above, before the thermosetting resin is cured, the floor slab is so impregnated in the thermoplastic resin fiber sheet 5 with at least a part of the thermosetting resin. A waterproofing member 4 is laid. In this way, the floor slab waterproofing member 4 and the thermosetting resin layer 2 can be firmly bonded and the above-described FRP waterproof layer can be configured.

  Next, the asphalt pavement 3 is laid on the thermoplastic resin sheet 6. The method for laying the asphalt pavement 3 is not particularly limited, and the asphalt pavement 3 can be laid by heating and rolling the material constituting the asphalt pavement 3 at the predetermined temperature described above. At this time, at least a part of the thermoplastic resin sheet 6 below the asphalt pavement 3 is temporarily melted and penetrated into the asphalt pavement 3 to be cured, so that the thermoplastic resin sheet 6 and the asphalt pavement 3 Can be firmly bonded.

  As described above, the durable and high-performance floor slab waterproofing structure 10 in which the floor slab 1, the thermosetting resin layer 2, the floor slab waterproofing member 4, and the asphalt pavement 3 are firmly bonded is formed in a short time. It can be constructed with. Therefore, the construction method of the floor slab waterproof structure of the present invention is suitable when it is necessary to construct in a short period of time such as renovation work.

  Hereinafter, specific examples of the present invention will be described.

1. Prior examination Three types of fiber sheets as shown in Table 1 were prepared, and a test method “crack following test II” of a waterproof floor slab waterproofing manual (Japan Road Association) was performed. In addition, immediately after applying 0.8 kg / m ^{2 of} epoxy resin (elongation rate 70%), the test piece was bonded to each fiber sheet that had been cut to a predetermined size, and after curing at 20 ° C. for 7 days Tested according to the test method. As a result, as shown in Table 1, the fiber sheet C was broken at 0.5 mm, and could not follow the shrinkage of the joints of the bridge.

  As described above, a high-temperature asphalt pavement is laid on the floor slab waterproofing member. Therefore, next, it was examined whether the fiber sheet can withstand a high temperature environment. The fiber sheet cut into 10 cm square was put in a thermostatic bath at predetermined temperatures (110 ° C., 140 ° C., 180 ° C.), and the situation after 30 minutes was observed. As shown in Table 1, the fiber sheet B was melted at 180 ° C.

  From the above results, the fiber sheet A was considered optimal for the floor slab waterproofing member of the present invention, and the fiber sheet A was used in the following examples.

2. Production of waterproof slab structure The slab waterproof structure according to each example was produced as follows.

Example 1
The surface of a 30 cm × 30 cm × 6 cm concrete plate (JIS A 5317 Class I standard flat plate, abbreviation: N, nominal 300) is treated with shot blasting to remove the latency, etc. A thermosetting resin (manufactured by Mitsubishi Plastics Co., Ltd., epoxy layer main agent / curing agent) as a main component was applied with a roller brush so that the coating amount was 1.0 kg / m ² . Immediately thereafter, a thermoplastic resin fiber sheet (fiber sheet A) and a thermoplastic resin sheet (Tomide 1320 and Tormide 210 manufactured by T & A TOKA Co., Ltd. were added at a ratio of tomide 1320: tomide 210 = 1: 1 (weight ratio) at 200 ° C. A 0.6 kg / m ² (30 cm square) sheet prepared by mixing for 10 minutes and pouring into a 0.6 mm thick mold. Softening point is 78 ° C.) The thermoplastic resin fiber sheet was laid so that it was on the lower side (the side on which the thermosetting resin was applied). The waterproof member for floor slab was provided with a plurality of ventilation holes. Next, a thermoplastic resin fiber sheet was impregnated with a thermosetting resin and cured (cured) at 20 ° C. for 90 minutes. Thereafter, an asphalt pavement heated to 140 ° C. by a conventional method was paved with a thickness of 4 cm on the thermoplastic resin sheet. As described above, a floor slab waterproofing structure according to Example 1 was produced.

Table 2 shows the conditions when paving the asphalt pavement. The asphalt pavement rolling temperature [° C] shown in Table 2 is the temperature of the asphalt pavement when the asphalt pavement is paved, and the concrete plate temperature [° C] is the concrete plate (floor when paving the asphalt pavement. Plate) temperature.
Table 3 shows the time required for each process and the total time required for the construction of the waterproof slab structure.

(Example 2)
A floor slab waterproofing structure according to Example 2 was produced in the same manner as in Example 1 except that the temperature at which the asphalt pavement was laid was 110 ° C.

(Comparative Example 1)
The surface of a 30 cm × 30 cm × 6 cm concrete plate (JIS A 5317 Class I standard flat plate, abbreviation: N, nominal 300) is treated with shot blasting to remove the latency, etc. Roller with thermosetting resin as main component (Mitsubishi Resin Co., Ltd., trade name: Novaretan PR-200 (main agent / curing agent) (Novateran is a registered trademark)) with a coating amount of 0.2 kg / m ² It was applied with a brush and dried (cured) to form a primer layer. Thereafter, a room temperature curing two-part polyurethane resin waterproofing material (manufactured by Mitsubishi Plastics Co., Ltd., trade name: Novaretan ES (Novaretane is a registered trademark)) was sprayed onto the primer layer with a spray gun to be cured to form a waterproof layer. . Thereafter, a pavement adhesive layer was formed on the waterproof layer. That is, after applying a urethane-based adhesive on the waterproof layer with a roller brush so that the basis weight is 0.2 kg / m ² , a sheet (EVA sheet) made of an ethylene-vinyl acetate copolymer is spread as an adhesive layer. The urethane adhesive was cured (cured). Thereafter, an asphalt pavement heated to 140 ° C. by an ordinary method was paved with a thickness of 4 cm on the EVA sheet. A floor slab waterproof structure according to Comparative Example 1 was produced as described above.

(Comparative Example 2)
A waterproof slab structure according to Comparative Example 2 was produced in the same manner as in Comparative Example 1 except that the temperature when laying the asphalt pavement was set to 110 ° C.

3. Evaluation “6. Tensile adhesion test” described in the road bridge floor slab waterproofing manual (March 2007, Japan Road Association) for the floor slab waterproof structure according to each example produced as described above. Based on this, the tensile adhesive strength was evaluated.
First, the floor slab waterproof structure according to each example was cut into a cylindrical shape having a diameter of 100 mm as shown in FIG. 2 using a core cutter until reaching the concrete slab from the asphalt pavement side. FIG. 2 is a view of the floor slab waterproof structure as viewed from the asphalt pavement side. After making a cut as described above, a steel tensile test jig having a diameter of 100 mm was bonded to the cut portion with an adhesive. Thereafter, it was placed in a constant temperature bath of 23 ° C. ± 2 ° C. and allowed to stand for 6 hours or more. Next, take out the thermostatic bath and immediately attach the tensile test jig to the tensile tester, pull the tensile test jig vertically at a loading speed of about 0.1 N / mm ² , and the maximum load when the waterproof slab structure breaks Was measured. Table 2 shows the value obtained by dividing the maximum load [N] by the adhesion area (7805 [mm ² ]) as the tensile adhesion strength [N / mm ² ].
Table 3 shows the time required for the construction of the waterproof slab structure according to each example.

  As shown in Table 2, the floor slab waterproof structures according to Examples 1 and 2 had a tensile adhesive strength equal to or higher than that of the floor slab waterproof structures according to Comparative Examples 1 and 2. Moreover, as shown in Table 3, according to the floor slab waterproof structure according to Examples 1 and 2, the construction time could be significantly shortened compared to the floor slab waterproof structure according to Comparative Examples 1 and 2. .

DESCRIPTION OF SYMBOLS 1 Floor slab 2 Thermosetting resin layer 3 Asphalt pavement 4 Waterproof member for floor slabs 5 Thermoplastic resin fiber sheet 6 Thermoplastic resin sheet 10 Floor slab waterproof structure

Claims (6)

A floor slab waterproofing member provided between the floor slab and the asphalt pavement,
A thermoplastic resin fiber sheet, which is a woven or non-woven fabric containing a thermoplastic resin having a softening point of 110 ° C. or higher, and a thermoplastic resin sheet containing a thermoplastic resin having a softening point of 150 ° C. or lower are laminated and integrated. Waterproofing material for floor slabs.   The waterproofing member for floor slabs according to claim 1, wherein the thermoplastic resin fiber sheet has a tensile elongation at room temperature of 20% or more.   The waterproofing member for floor slabs according to claim 1 or 2, comprising a vent hole penetrating in the thickness direction. A floor slab waterproof structure provided on the floor slab,
The thermosetting resin layer made of a thermosetting resin containing at least one of epoxy resin, acrylic resin and urethane resin formed on the floor slab, and the floor according to any one of claims 1 to 3 A waterproof member for a plate, and the waterproof member for a floor slab is laid on the thermosetting resin layer so that the thermoplastic resin fiber sheet is in contact with the thermosetting resin layer, and the thermosetting A floor slab waterproof structure in which the thermoplastic resin fiber sheet is impregnated with at least a part of the thermosetting resin constituting the adhesive resin layer.   The floor slab waterproofing structure according to claim 4, wherein an asphalt pavement is laid on the thermoplastic resin sheet. A construction method of a floor slab waterproof structure provided on the floor slab,
Applying or spraying a thermosetting resin containing at least one of epoxy resin, acrylic resin or urethane resin on the floor slab;
Before the thermosetting resin is cured, the thermoplastic resin fiber sheet is impregnated with at least a part of the thermosetting resin of the waterproof member for floor slab according to any one of claims 1 to 3. And the process of laying
Laying an asphalt pavement on the thermoplastic resin sheet;
Construction method of floor slab waterproofing structure.

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