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JP3761697B2 - Waterproof construction method for flat roof - Google Patents

Waterproof construction method for flat roof Download PDF

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Publication number
JP3761697B2
JP3761697B2 JP32247497A JP32247497A JP3761697B2 JP 3761697 B2 JP3761697 B2 JP 3761697B2 JP 32247497 A JP32247497 A JP 32247497A JP 32247497 A JP32247497 A JP 32247497A JP 3761697 B2 JP3761697 B2 JP 3761697B2
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JP
Japan
Prior art keywords
rubber sheet
flat roof
nonwoven fabric
rubber
nails
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
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JP32247497A
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Japanese (ja)
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JPH11141065A (en
Inventor
正行 坪井
孝治 吉岡
知英 津田
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Toyo Tire Corp
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Toyo Tire and Rubber Co Ltd
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Priority to JP32247497A priority Critical patent/JP3761697B2/en
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Description

【０００１】
【産業上の利用分野】
この発明は、陸屋根上にゴムシートを敷いて行う防水施工方法に関するものである。
【０００２】
【従来の技術】
コンクリート建築物の陸屋根の防水施工方法として、陸屋根上に多数枚のゴムシートを、隣接する２枚のゴムシートの縁部が重なるように並べて敷き、下側のゴムシートを金具、例えば釘、ビス等で陸屋根に固定し、上側ゴムシートを下側のゴムシートに接着剤で接着する方法が知られている。しかしながら、従来は、コンクリート製の陸屋根上にゴムシートを敷き、上から釘やビスを打ち込むだけであったため、ゴムシートが熱膨張で皺を発生し、施工時の作業が困難になると共に、仕上がりの外観が不良になるという問題があった。
【０００３】
【発明が解決しようとする課題】
この発明は、ゴムシートの熱膨張を防いで施工を容易にし、かつ仕上がり外観を良好にするものである。
【０００４】
【課題を解決するための手段】
この発明に係る陸屋根の防水施工方法は、陸屋根上に多数枚のゴムシートを敷くに際し、隣接する２枚のゴムシートの縁部が重なるように並べ、下側のゴムシートの縁部をビスや釘の打込みで陸屋根に固定し、このビスや釘を覆うように上側のゴムシートの縁部を下側のゴムシートに接着剤で接着する陸屋根の防水施工方法において、上記のゴムシートとして合成繊維からなる高モジュラスの不織布で補強された補強ゴムシートを使用し、上記のビスや釘を打ち込む際、下面に複数個の爪が突設されている金属ワッシャーを上記下側の補強ゴムシート上に重ね、この金属ワッシャーの上からビスや釘を打ち込むことにより、金属ワッシャーの下面の爪を下側補強ゴムシートの不織布に引っ掛けることを特徴とする。
【０００５】
この発明によれば、陸屋根を被覆する多数枚の補強ゴムシートが互いに接着剤で接合され、この接着部の下側補強ゴムシートがビスや釘で陸屋根に固定される。その際、上記の補強ゴムシートが高モジュラスの不織布で補強されているので、補強ゴムシートのゴム層の熱膨張が上記不織布によって抑制され、施工時の作業が容易になる。そして、下側補強ゴムシートの上から陸屋根にビスや釘を打込む際に、下側補強ゴムシート上に金属ワッシャーを重ね、この金属ワッシャー下面に突出する爪を上記の打込みにより補強ゴムシートに食い込ませて上記不織布の繊維に引っ掛けるので、補強ゴムシートが引裂かれたり、施工後に熱膨張で皺が生じたりすることがなく、施工後の外観が良好に保たれ、しかもゴムシートとしての防水機能が失われない。
【０００６】
上記補強ゴムシートのゴム層を構成するゴムは、天然ゴムまたはＥＰＤＭ、ＢＲ、ＳＢＲ、ＩＲ等の合成ゴムのいずれでもよいが、耐候性の点で特にＥＰＤＭが好ましい。このゴム層は、不織布の上面のみに設けてもよく、また上下両面に設けてもよく、上下両面に設ける場合は下面のゴム層を発泡層とすることができる。不織布の上面のみに設けたものは陸屋根の下地に凹凸がなく平坦な場合に、また上下両面に設けたものは下地に凹凸が存在する場合に、また下面のゴム層を発泡層としたものは下地の凹凸が特に大きい場合にそれぞれ適している。なお、いずれの場合も、ゴム層または発泡ゴム層を加硫した後に不織布と接着により一体化してもよいが、ゴム層を未加硫または未発泡のシート状態で不織布と重ねた後、加硫または常圧発泡により不織布と一体化するのが有利である。
【０００７】
使用する不織布は、ポリエチレンテレフタレート繊維からなるスパンボンド不織布であって、２０℃における１％伸長時モジュラスが１０００ kgf／cm2 以上のものが好ましく、この１％伸長時モジュラスが１０００ kgf／cm2 未満では施工時におけるゴムシートの熱膨張を抑えることができず、皺が発生して作業が困難になると共に施工後の外観が不良になる。また、上記不織布の目付量は３０〜２００ｇ／ｍ2 、特に４０〜８０ｇ／ｍ2 が好ましく、３０ｇ／ｍ2 未満では強度が不足し、反対に２００ｇ／ｍ2 を超えると、補強ゴムシートの硬さが増し、施工その他の取扱い性が悪くなる。
【０００８】
【発明の実施の形態】
図３に不織布１１ｆで補強された３種の補強ゴムシート１１Ａ、１１Ｂ、１１Ｃが図示される。左端の補強ゴムシート１１Ａは、上面ゴム層１１ａ、不織布１１ｆおよび下面ゴム層１１ｂの三者の積層体であり、不織布１１ｆに上面ゴム層１１ａおよび下面ゴム層１１ｂをそれぞれ未加硫状態で重ねて加硫し、上面ゴム層１１ａ、不織布１１ｆおよび下面ゴム層１１ｂの三者を加硫接着で一体化して製造される。ただし、不織布１１ｆとしては、ポリエチレンテレフタレートからなるスパンボンド不織布で、２０℃における１％伸長時応力１０００ kgf／cm2 以上、目付量４０〜８０ｇ／ｍ2 のもの（例えば、東洋紡績株式会社製「東洋紡バルコンポＨＰ６０４０Ｇ」）が用いられる。また、上面ゴム層１１ａおよび下面ゴム層１１ｂは、好ましくはＥＰＤＭで成形され、厚みは上面ゴム層１１ａおよび下面ゴム層１１ｂとも０．５〜２．０mm程度に設定される。
【０００９】
図３の中央に示す補強ゴムシート１１Ｂは、上記同様の不織布１１ｆの上に厚手の上面ゴム層１１ｃを積層したものであり、不織布１１ｆ上に好ましくはＥＰＤＭからなる未加硫の上面ゴム層（厚み０．５〜２．０mm）１１ｃを重ねて加硫し、不織布１１ｆおよび上面ゴム層１１ｃの二者を加硫接着で一体化して製造される。また、図３の右端に示す補強ゴムシート１１Ｃは、上記同様の不織布１１ｆに薄手の上面ゴム層（厚み０．５〜２．０mm）１１ｄおよび発泡状態の下面ゴム層（厚み０．５〜２．０mm）１１ｅをそれぞれ積層したものであり、不織布１１ｆの上に好ましくはＥＰＤＭからなる未加硫の上面ゴム層１１ｄを、下に好ましくはＥＰＤＭからなり発泡剤を含有する未発泡の下面ゴム層１１ｅをそれぞれ重ね、常圧加硫で下面ゴム層１１ｅを発泡させると同時に上面ゴム層１１ｄ、不織布１１ｆおよび下面ゴム層１１ｅの三者を加硫接着で一体化して製造される。
【００１０】
図１において、１０は陸屋根の表面を構成するコンクリート層、１１はコンクリート層１０を被覆する補強ゴムシートであり、この補強ゴムシート１１は図３に示す補強ゴムシート１１Ａ、１１Ｂ、１１Ｃのいずれでもよい。この補強ゴムシート１１は、その多数枚がコンクリート層１０を被覆するように並べて敷かれ、その際に２枚の隣接する補強ゴムシート１１の縁部が上下に重ねられる。このとき、重ね幅Ｂは、１００〜１５０mm程度に設定される。ただし、重なり部の下側補強ゴムシート１１の中央付近にあらかじめ円形の金属ワッシャー１２が下側補強ゴムシート１１の縁に沿って２５０〜４００mmのピッチで一列に配置され、この金属ワッシャー１２の上からコンクリート釘１３がコンクリート層１０に打ち込まれ、上記下側補強ゴムシート１１が陸屋根に固定される。そして、下側補強ゴムシート１１の片側縁部上に接着剤１４が塗布され、その上に上側補強ゴムシート１１の縁部が重ねられ、下側補強ゴムシート１１と接合される。
【００１１】
上記の円板形金属ワッシャー１２は、図２に拡大して示すように、中央平坦部にコンクリート釘１３の挿通孔１２ａを有し、その周囲に比較的高い内側山部１２ｂおよび比較的低い外側山部１２ｃを同心円状に成形し、内側山部１２ｂおよび外側山部１２ｃの間の谷部下面に三角形の爪１２ｄを下向きに４個、等間隔に突設したものである。なお、爪１２ｄの高さは、上記のコンクリート釘１３を打ち込んだ際、爪１２ｄの尖端が補強ゴムシート１１の不織布１１ｆ（図３参照）に達する程度に設定される。
【００１２】
【実施例】
実施例１
不織布としてポリエチレンテレフタレート繊維からなるスパンボンド不織布（東洋紡績株式会社製「バルコンポＨＰ６０４０Ｇ」）を用いた。厚さは０．２mm、目付量は４０ｇ／ｍ2 、温度２０℃における１％伸長時モジュラスは８６９０ kgf／cm2 であった。図３に示すように、上記の不織布１１ｆ上にＥＰＤＭからなる厚さ１．２mm、幅１２００mmの上面ゴム層１１ａを、下に同じくＥＰＤＭからなる厚さ１．２mm、幅１２００mmの下面ゴム層１１ｂをそれぞれ未加硫状態で重ね、温度１８０℃、圧力５０ kgf／cm2 のプレス機で１０分間加硫して補強ゴムシート１１Ａを得た。なお、ＥＰＤＭからなる加硫ゴムシートの２０℃における１％伸長時応力は１ kgf／cm2 であった。
【００１３】
上記の補強ゴムシート１１Ａを陸屋根上に敷き（図１参照）、その際、隣接する２枚の補強ゴムシート１１Ａの縁部の重なり幅Ｂを１５０mmに設定し、下側補強ゴムシート１１Ａの端縁から内側へ６０mmの位置に図２の金属ワッシャー（直径：５０mm、爪１２ｄの突出高さ：２mm、爪１２ｄの個数：４個）１２を４００mm間隔で１列に並べ、この金属ワッシャー１２の上からコンクリート釘１３を打込んで下側補強ゴムシート１１Ａを固定した。次いで、この下側補強ゴムシート１１Ａの縁部に接着剤としてネオプレン系溶剤型接着剤（東洋ゴム工業株式会社製「トーヨーアクメボンドＡＤ−１０２」）を１５０mmの幅に塗布し、その塗布面に上側補強ゴムシート１１Ａの縁部を重ね、加圧して上下の補強ゴムシート１１Ａを接合した。
【００１４】
上記の防水施工作業は、気温２５℃の陸屋根上で行われたが、補強ゴムシート１１Ａの熱膨張はほとんど無く、容易に作業することができ、施工後の皺発生も認められなかった。
【００１５】
実施例２
図３の中央に示される補強ゴムシート１１Ｂ、すなわち不織布１１ｆ上にＥＰＤＭからなる厚手の上面ゴム層（厚み：１．５mm）１１ｃを積層したものを、また金属ワッシャー１２として爪１２ｄの突出高さが３mmのものをそれぞれ用い、その他は実施例１と同様にして陸屋根の防水施工を行った。施工作業は、実施例１と同様に容易であり、施工後の皺発生もなかった。
【００１６】
実施例３
図３の右に示される補強ゴムシート１１Ｃ、すなわち不織布１１ｆ上にＥＰＤＭからなる薄手の上面ゴム層（厚み：１．５mm）１１ｄを、下にＥＰＤＭからなる発泡した下面ゴム層（厚み：１mm、密度：０．５）１１ｅをそれぞれ積層してなる補強ゴムシート１１Ｃを用いる以外は、実施例１と同様にして陸屋根の防水施工を行った。なお、加硫と発泡は、熱風による常圧加硫を１８０℃で１８分間行った。施工作業は、実施例１と同様に容易であり、かつ施工後の皺発生もなかった。
【００１７】
【発明の効果】
この発明は、上記のとおり補強ゴムシートを用いて陸屋根の防水施工を行うことができ、しかも補強ゴムシートが熱膨張しないため、施工作業が容易であり、また施工後に皺の発生することがなく、外観が良好に維持される。
【図面の簡単な説明】
【図１】実施形態の断面図である。
【図２】図１の要部の拡大断面図である。
【図３】補強ゴムシートの拡大断面図である。
【符号の説明】
１０：陸屋根表面のコンクリート層
１１、１１Ａ、１１Ｂ、１１Ｃ：補強ゴムシート
１１ａ、１１ｂ、１１ｃ、１１ｄ：ゴム層
１１ｅ：発泡したゴム層
１１ｆ：不織布
１２：金属ワッシャー
１２ｄ：爪
１３：コンクリート釘
１４：接着剤[0001]
[Industrial application fields]
The present invention relates to a waterproof construction method performed by laying a rubber sheet on a flat roof.
[0002]
[Prior art]
As a waterproof construction method for concrete roofs, a large number of rubber sheets are laid on the roof so that the edges of two adjacent rubber sheets overlap, and the lower rubber sheet is attached to a metal fitting such as a nail or screw. A method of fixing an upper rubber sheet to a lower rubber sheet with an adhesive is known. However, in the past, a rubber sheet was laid on a concrete flat roof and only nails and screws were driven in from above, so the rubber sheet generated wrinkles due to thermal expansion, making the work during construction difficult and finishing. There was a problem that the appearance of the was poor.
[0003]
[Problems to be solved by the invention]
This invention prevents the thermal expansion of the rubber sheet, facilitates the construction, and improves the finished appearance.
[0004]
[Means for Solving the Problems]
In the waterproof construction method for a flat roof according to the present invention, when a large number of rubber sheets are laid on the flat roof, the edges of the two adjacent rubber sheets are arranged so that they overlap each other, and the edges of the lower rubber sheet are In the waterproof construction method of a flat roof where the upper rubber sheet is fixed to the flat roof by nailing and the edges of the upper rubber sheet are bonded to the lower rubber sheet with an adhesive so as to cover the screws and nails, the synthetic fiber is used as the rubber sheet. When a reinforced rubber sheet reinforced with a high modulus nonwoven fabric is used and the above screws and nails are driven, a metal washer with a plurality of claws protruding on the lower surface is placed on the lower reinforced rubber sheet. By repeatedly driving a screw or nail from above the metal washer, the lower surface of the metal washer is hooked on the nonwoven fabric of the lower reinforcing rubber sheet.
[0005]
According to the present invention, a large number of reinforcing rubber sheets covering the flat roof are joined to each other with the adhesive, and the lower reinforcing rubber sheet of the bonded portion is fixed to the flat roof with screws or nails. At that time, since the reinforcing rubber sheet is reinforced with the high modulus nonwoven fabric, the thermal expansion of the rubber layer of the reinforcing rubber sheet is suppressed by the nonwoven fabric, and the work at the time of construction becomes easy. When a screw or nail is driven into the flat roof from above the lower reinforcing rubber sheet, a metal washer is stacked on the lower reinforcing rubber sheet, and the nail protruding from the lower surface of the metal washer is applied to the reinforcing rubber sheet by the above driving. Since it is bitten and hooked on the above-mentioned nonwoven fabric fibers, the reinforcing rubber sheet will not be torn, and wrinkles will not occur due to thermal expansion after construction, the appearance after construction is kept good, and the waterproof function as a rubber sheet Will not be lost.
[0006]
The rubber constituting the rubber layer of the reinforcing rubber sheet may be either natural rubber or synthetic rubber such as EPDM, BR, SBR, IR, etc. EPDM is particularly preferred from the viewpoint of weather resistance. The rubber layer may be provided only on the upper surface of the nonwoven fabric, or may be provided on both upper and lower surfaces. When the rubber layer is provided on both upper and lower surfaces, the lower rubber layer can be a foam layer. What is provided only on the upper surface of the nonwoven fabric is flat when there is no unevenness on the base of the flat roof, what is provided on both upper and lower sides is when there is unevenness on the base, and the rubber layer on the lower surface is a foam layer It is suitable when the unevenness of the ground is particularly large. In either case, the rubber layer or the foamed rubber layer may be vulcanized and integrated with the nonwoven fabric by adhesion. However, the rubber layer is laminated with the nonwoven fabric in an unvulcanized or unfoamed sheet state, and then vulcanized. Alternatively, it is advantageous to integrate with the nonwoven fabric by normal pressure foaming.
[0007]
The nonwoven fabric to be used is a spunbond nonwoven fabric made of polyethylene terephthalate fibers, preferably having a modulus at 1% elongation of 1000 kgf / cm 2 or more at 20 ° C., and the modulus at 1% elongation of less than 1000 kgf / cm 2. However, the thermal expansion of the rubber sheet at the time of construction cannot be suppressed, so that wrinkles occur and the work becomes difficult and the appearance after construction becomes poor. Also, the basis weight of the nonwoven fabric 30 to 200 g / m 2, particularly preferably 40 and 80 g / m 2, insufficient strength is less than 30 g / m 2, when it exceeds 200 g / m 2 on the opposite, the reinforcing rubber sheet Hardness increases and the handling and other handling properties deteriorate.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 3 shows three types of reinforcing rubber sheets 11A, 11B, and 11C reinforced with a nonwoven fabric 11f. The leftmost reinforcing rubber sheet 11A is a three-layered laminate of an upper rubber layer 11a, a nonwoven fabric 11f, and a lower rubber layer 11b. The upper rubber layer 11a and the lower rubber layer 11b are stacked on the nonwoven fabric 11f in an unvulcanized state. Vulcanized and manufactured by integrating the upper rubber layer 11a, the nonwoven fabric 11f, and the lower rubber layer 11b by vulcanization adhesion. However, the non-woven fabric 11f is a spunbonded non-woven fabric made of polyethylene terephthalate, having a stress of 1000 kgf / cm 2 or more at 1% elongation at 20 ° C. and a basis weight of 40 to 80 g / m 2 (for example, “Toyobo Co., Ltd.“ Toyobo VALCOMPO HP6040G ") is used. The upper rubber layer 11a and the lower rubber layer 11b are preferably formed of EPDM, and the thickness of both the upper rubber layer 11a and the lower rubber layer 11b is set to about 0.5 to 2.0 mm.
[0009]
The reinforcing rubber sheet 11B shown in the center of FIG. 3 is obtained by laminating a thick upper surface rubber layer 11c on the same nonwoven fabric 11f as above, and an unvulcanized upper surface rubber layer (preferably made of EPDM) (on the nonwoven fabric 11f). (Thickness 0.5 to 2.0 mm) 11c are stacked and vulcanized, and the nonwoven fabric 11f and the upper rubber layer 11c are integrated by vulcanization adhesion. Further, the reinforcing rubber sheet 11C shown at the right end of FIG. 3 has a thin upper rubber layer (thickness 0.5 to 2.0 mm) 11d and a foamed lower rubber layer (thickness 0.5 to 2) on the same nonwoven fabric 11f. 0.0 mm) 11e, and an unvulcanized upper rubber layer 11d, preferably made of EPDM, on the nonwoven fabric 11f, and an unfoamed lower rubber layer, preferably made of EPDM, containing a foaming agent. 11e are stacked, and the lower rubber layer 11e is foamed by normal pressure vulcanization, and at the same time, the upper rubber layer 11d, the nonwoven fabric 11f and the lower rubber layer 11e are integrated by vulcanization.
[0010]
In FIG. 1, 10 is a concrete layer constituting the surface of the flat roof, 11 is a reinforcing rubber sheet covering the concrete layer 10, and this reinforcing rubber sheet 11 is any of the reinforcing rubber sheets 11A, 11B, 11C shown in FIG. Good. A large number of the reinforcing rubber sheets 11 are laid side by side so as to cover the concrete layer 10, and at that time, the edges of two adjacent reinforcing rubber sheets 11 are stacked one above the other. At this time, the overlap width B is set to about 100 to 150 mm. However, circular metal washers 12 are arranged in advance at a pitch of 250 to 400 mm along the edge of the lower reinforcement rubber sheet 11 in the vicinity of the center of the lower reinforcement rubber sheet 11 of the overlapping portion. The concrete nails 13 are driven into the concrete layer 10 and the lower reinforcing rubber sheet 11 is fixed to the flat roof. Then, the adhesive 14 is applied on one side edge of the lower reinforcing rubber sheet 11, and the edge of the upper reinforcing rubber sheet 11 is overlaid thereon and joined to the lower reinforcing rubber sheet 11.
[0011]
The disk-shaped metal washer 12 has an insertion hole 12a for the concrete nail 13 in the central flat portion, and has a relatively high inner peak portion 12b and a relatively low outer portion as shown in FIG. The crest 12c is formed concentrically, and four triangular claws 12d are projected downward at equal intervals on the bottom surface of the trough between the inner crest 12b and the outer crest 12c. The height of the claw 12d is set to such an extent that the tip of the claw 12d reaches the nonwoven fabric 11f (see FIG. 3) of the reinforcing rubber sheet 11 when the concrete nail 13 is driven.
[0012]
【Example】
Example 1
As the non-woven fabric, a spunbonded non-woven fabric made of polyethylene terephthalate fibers (“Valcompo HP6040G” manufactured by Toyobo Co., Ltd.) was used. The thickness was 0.2 mm, the basis weight was 40 g / m 2 , and the modulus at 1% elongation at a temperature of 20 ° C. was 8690 kgf / cm 2 . As shown in FIG. 3, an upper rubber layer 11a made of EPDM having a thickness of 1.2 mm and a width of 1200 mm is formed on the nonwoven fabric 11f, and a lower rubber layer 11b having a thickness of 1.2 mm and a width of 1200 mm made of EPDM is also provided below. Were vulcanized for 10 minutes with a press machine at a temperature of 180 ° C. and a pressure of 50 kgf / cm 2 to obtain a reinforced rubber sheet 11A. The vulcanized rubber sheet made of EPDM had a stress at 1% elongation at 20 ° C. of 1 kgf / cm 2 .
[0013]
The above-mentioned reinforcing rubber sheet 11A is laid on a flat roof (see FIG. 1). At that time, the overlapping width B of the edges of two adjacent reinforcing rubber sheets 11A is set to 150 mm, and the end of the lower reinforcing rubber sheet 11A is set. The metal washers 12 shown in FIG. 2 (diameter: 50 mm, protrusion height of claws 12 d: 2 mm, number of claws 12 d: 4) 12 are arranged in a line at intervals of 400 mm at a position 60 mm inward from the edge. Concrete nails 13 were driven in from above to fix the lower reinforcing rubber sheet 11A. Next, a neoprene solvent-type adhesive (“Toyo Acme Bond AD-102” manufactured by Toyo Tire & Rubber Co., Ltd.) is applied to the edge of the lower reinforcing rubber sheet 11A as an adhesive to a width of 150 mm and applied to the coated surface. The edges of the upper reinforcing rubber sheet 11A were overlapped and pressed to join the upper and lower reinforcing rubber sheets 11A.
[0014]
Although the above waterproof construction work was performed on a flat roof with an air temperature of 25 ° C., there was almost no thermal expansion of the reinforced rubber sheet 11A, and it was possible to work easily and no generation of wrinkles after construction was observed.
[0015]
Example 2
The reinforcing rubber sheet 11B shown in the center of FIG. 3, that is, a non-woven fabric 11f laminated with a thick upper rubber layer (thickness: 1.5 mm) 11c made of EPDM is used as a metal washer 12, and the protruding height of the claws 12d Were used for waterproofing of the flat roof in the same manner as in Example 1. The construction work was easy as in Example 1, and no wrinkles were generated after construction.
[0016]
Example 3
A thin upper rubber layer (thickness: 1.5 mm) 11d made of EPDM is formed on the reinforcing rubber sheet 11C, that is, the nonwoven fabric 11f shown on the right in FIG. 3, and a foamed lower rubber layer (thickness: 1 mm, Density: 0.5) Waterproofing of the flat roof was performed in the same manner as in Example 1 except that the reinforcing rubber sheet 11C formed by laminating 11e was used. For vulcanization and foaming, normal pressure vulcanization with hot air was performed at 180 ° C. for 18 minutes. The construction work was easy as in Example 1, and no wrinkles were generated after construction.
[0017]
【The invention's effect】
This invention can perform waterproofing construction of a flat roof using a reinforced rubber sheet as described above, and since the reinforced rubber sheet does not thermally expand, the construction work is easy and no wrinkles occur after construction. The appearance is kept good.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an embodiment.
FIG. 2 is an enlarged cross-sectional view of a main part of FIG.
FIG. 3 is an enlarged cross-sectional view of a reinforced rubber sheet.
[Explanation of symbols]
10: Concrete layers 11, 11A, 11B, 11C on the surface of the flat roof: Reinforced rubber sheets 11a, 11b, 11c, 11d: Rubber layer 11e: Foamed rubber layer 11f: Non-woven fabric 12: Metal washer 12d: Claw 13: Concrete nail 14: adhesive

Claims (2)

陸屋根上に多数枚のゴムシートを敷くに際し、隣接する２枚のゴムシートの縁部が重なるように並べ、下側のゴムシートの縁部をビスや釘の打込みで陸屋根に固定し、このビスや釘を覆うように上側のゴムシートの縁部を下側のゴムシートに接着剤で接着する陸屋根の防水施工方法において、上記のゴムシートとして合成繊維からなる高モジュラスの不織布で補強された補強ゴムシートを使用し、上記のビスや釘を打ち込む際、下面に複数個の爪が突設されている金属ワッシャーを上記下側の補強ゴムシート上に重ね、この金属ワッシャーの上からビスや釘を打ち込むことにより、金属ワッシャーの下面の爪を下側補強ゴムシートの不織布に引っ掛けることを特徴とする陸屋根の防水施工方法。When laying a large number of rubber sheets on a flat roof, arrange the edges of two adjacent rubber sheets so that they overlap, and fix the lower rubber sheet edge to the flat roof with screws or nails. In the waterproof construction method of a flat roof where the edge of the upper rubber sheet is adhered to the lower rubber sheet with an adhesive so as to cover the nails, the reinforcement reinforced with a high modulus nonwoven fabric made of synthetic fibers as the rubber sheet When a rubber sheet is used and the above screws and nails are driven, a metal washer with a plurality of claws protruding on the lower surface is overlaid on the lower reinforcing rubber sheet, and the screws and nails are placed on the metal washer. A waterproof construction method for a flat roof characterized in that the nail on the lower surface of the metal washer is hooked on the nonwoven fabric of the lower reinforcing rubber sheet by driving in. 用いる不織布がエチレンテレフタレート繊維からなり、２０℃における１％伸長時モジュラスが１０００ kgf／cm2 以上、目付量が３０〜２００ｇ／ｍ2 のスパンボンド不織布である請求項１に記載の陸屋根の防水施工方法。The waterproof construction of a flat roof according to claim 1, wherein the nonwoven fabric used is made of ethylene terephthalate fiber, and is a spunbonded nonwoven fabric having a modulus at 1% elongation at 20 ° C of 1000 kgf / cm 2 or more and a basis weight of 30 to 200 g / m 2. Method.
JP32247497A 1997-11-07 1997-11-07 Waterproof construction method for flat roof Expired - Fee Related JP3761697B2 (en)

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JP2007039987A (en) * 2005-08-03 2007-02-15 Takenaka Komuten Co Ltd Waterproof-sheet fixing structure
JP2008297781A (en) * 2007-05-31 2008-12-11 Sumitomo Bakelite Co Ltd Sheet waterproofing fixing structure
KR101112996B1 (en) * 2009-04-21 2012-03-14 송은채 Concrete feed tank interior waterproof polyethylene seat construction method and accordingly waterproof polyethylene seat
CN113613753A (en) * 2019-03-15 2021-11-05 东丽株式会社 Filter material and filter unit

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