JPH0228544B2 - DOBOKUSHIITOOYOBISONOSEIHO - Google Patents
DOBOKUSHIITOOYOBISONOSEIHOInfo
- Publication number
- JPH0228544B2 JPH0228544B2 JP27406384A JP27406384A JPH0228544B2 JP H0228544 B2 JPH0228544 B2 JP H0228544B2 JP 27406384 A JP27406384 A JP 27406384A JP 27406384 A JP27406384 A JP 27406384A JP H0228544 B2 JPH0228544 B2 JP H0228544B2
- Authority
- JP
- Japan
- Prior art keywords
- civil engineering
- rubber
- engineering sheet
- sheet according
- fabric
- 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 - Lifetime
Links
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- 239000002002 slurry Substances 0.000 claims description 17
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- 239000004753 textile Substances 0.000 claims description 2
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- 239000002585 base Substances 0.000 description 26
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- 235000013162 Cocos nucifera Nutrition 0.000 description 1
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Landscapes
- Laminated Bodies (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Revetment (AREA)
Description
〔発明の利用分野〕
本発明は土木シートに関し、さらに詳しくは沈
床マツト、洗堀防止マツト、摩擦マツトなど水と
接触する場所に敷設して、構造物の沈下や流水に
よる土砂の搬出を防止するのに好適な土木シート
に関する。
〔従来の技術〕
海岸や河川岸、湖沼の防波堤などの水系と接す
る構造物を構築した際、その基礎部分の土砂が流
水によつて洗堀されて構造物が傾斜したり、テト
ラポツトなどの消波設備を岸壁に設けた際、洗堀
によつて海底部がえぐられてテトラポツト群が崩
壊したりする。このような現象を防止するため、
俗に沈床マツト、沈堀防止マツトなどと言われる
土木シートを構造物基礎附近の地面やテトラポツ
ト設置部の地面に敷設し、流水力による土砂の搬
出を防止することが行なわれている。これらの目
的に使用する土木シートは、通常２種類に分ける
ことができる。すなわち、一方はゴムシート、プ
ラスチツクシートあるいはアスフアルトシートに
代表される防水性シートであり、他方はやし繊
維、しゆろ繊維などの天然繊維のシートあるいは
このシートと金網などの補強剤を組み合せた透水
性シートである。前者のシートの場合、洗堀防止
用に用いると、地山から水が出てくるような湧水
現場では排水処理対策を施す必要があり、また突
起物や水圧によるシート波損とその伝播の防止の
ためにシート自身を厚肉化しなけばならないなど
の問題がある。
一方、後者のシートは透水性なので水の流出入
が自由であり、砂泥だけ流出を防止でき、また伸
びが大きくて応力緩和するため前者のような問題
は発生しない。しかし、この透水性シートは一般
に水の比重と同等程度のものが多く。水中あるい
は水辺での敷設施工の時にシートが水中に浮遊し
たり浮き上つて敷設しにくく、また仮に敷設でき
ても、所定の位置に敷設できないので施工性が悪
いという問題がある。この問題解決のため天然繊
維シートを金網で補強し、シートの補強と比重の
増加の両方の効果を合わせ持たしたものがある。
しかし、金網は水とくに海水に対しては腐蝕され
易く、余り好ましくない。この変法としてプラス
チツクネツトを用いる方法があるが、これだと比
重の増加は難しく前述したような沈降性改良は望
めない。
そこで本出願人は、特願昭59−43870号におい
て、透水性シートでかつ水中での沈降性がよく、
強度に優れた土木シートを提案した。すなわち、
この土木シートは実質的に合成樹脂フイラメント
からなる編織布および／または不織布と水硬性物
質とを一体化したシートである。本出願人はこの
土木シートを用いて研究を更に積み重ねた結果、
所期の目的は達成できるものの、思わぬことに土
木シートと一体化している水硬性物質がシートを
折り曲げたりした時に離脱し易く、したがつて作
業時に水硬性物質の粉が舞い上がつたり、敷設場
所の水を一時的に懸濁させたりする虞のあること
が判明した。
〔発明が解決しようとする問題点〕
本発明者らは、以上のような問題に鑑みて、水
硬性物質が離脱しないように改善できないのか検
討を続けた結果、ポリマー懸濁液を介在させて水
硬性物質を一体化すると目的が達成でき、しかも
予期しないことに土木マツト自体の可撓性も向上
し、その結果取扱い性、作業性、地山形状への付
随性が良好なる土木シートが得られることが判つ
た。
〔問題点を解決するための手段〕
すなわち、本発明は実質的に合成樹脂フイラメ
ントからなる編織布および／または不織布のフイ
ラメント間空隙中に、ポリマーの分散した水硬性
物質が充填されて一体化していることを特徴とす
る土木シートに関し、また別には好適な製法に関
するものであつて、実質的に合成樹脂フイラメン
トからなる編織布および／または不織布の少なく
とも一方の面に、水硬性物質とポリマー懸濁液を
含むスラリーをフラツシユし、振動または吸引力
によつてスラリーを基材布内部まで浸透させ、そ
の後加熱・養生して硬化一体化することを特徴と
する土木シートの製法に関する。
〔作 用〕
本発明の基材布となる編織布または不織布のう
ち、前者はなるべく嵩高のフイラメントで編織さ
れてものであつて、フイラメント相互間にかなり
大きな間隙を有していなければならない。具体的
には自重と同量以上の水硬性物質が充填されるだ
けのフイラメント間空隙を有したものが好まし
い。後者は本発明において最も好適な土木シート
を提供できる。すなわち溶融接着や接着剤あるい
はニードルパンチ、ミシン縫いなどによつてシー
ト状にフイラメントを集束したものは、嵩高でフ
イラメント間の空隙が大きいので自重と同量以上
の水硬性物質をその空隙中に充填でき、しかも透
水性を保持できる。なかでもスパンポンド法不織
布は、引張り強度、弾力性に優れ好適である。好
適な不織布としては、厚さ２〜８mm、目付け重量
100〜800ｇ／m2とくに200ｇ／m2〜800ｇ／m2、５
cm巾あたりの引張り強度が50〜200Kgのものであ
り、とくに伸びの大きいものがよい。
上記の基材布を構成するフイラメントは合成繊
維もしくは必要に応じて少量の天然繊維を混入し
たものである。天然繊維だけでは、強度が弱いの
で、後述する水硬性物質と一体化したときの土木
シートは脆くなりすぎる。合成繊維は、ポリオレ
フイン、ポリエステル、ポリアミドなど公知の如
何なる合成樹脂からできていてもよい。なかでも
取り分けて好適なものは耐水性、耐薬品性、耐ア
ルカリ性に優れているポリオレフイン類であり、
ポリエチレン、ポリプロピレンなどが例示でき
る。
本発明の基材布で最も好適な態様は、ポリオレ
フインとくにポリプロピレンを原料としてスパン
ポンド法で得られる連続長繊維不織布である。と
くに繊維を３次元的に絡ませる方法としてニード
ルパンチングを使用したものは、水硬性物質が不
織布内部まで容易に入り込むので好適である。
水硬性物質はセメント、モルタルなどであつ
て、大粒径の砂や砂利を含まないものである。大
粒径物が混入していると、基材布表面のフイラメ
ント間空隙でこれらのものが詰まつて、基材布内
部まで水硬性物質が浸透しない。
ポリマーはセメント配合用として知られている
種々のものが使用でき、具体的にはゴム、熱可塑
性樹脂、熱硬化性樹脂、歴青質、あるいはこれら
の混合物などがある。これらのうちでもゴムまた
は熱可塑性樹脂、とくにゴムが好適である。ゴム
としてたとえば天然ゴム（NR）、クロロプレン
ゴム（CR）、スチレン・ブタジエンゴム
（SBR）、アクリロニトリル・ブタジエンゴム
（NBR）、ブチルゴム（IIR）、ブタジエン・メタ
クリレートゴム（NBR）を挙げることができる。
熱可塑性樹脂としてはたとえばポリ酢酸ビニル、
ポリ塩化ビニル、ポリ塩化ビニリデン、ポリ（メ
タ）アクリル酸メチル、アイオノマーあるいはポ
リエチレン、ポリプロピレンなどのポリオレフイ
ン更には変性によつてカルボキシル基を導入させ
たポリオレフインなどを挙げることができる。
水硬性物質およびポリマーの割合は、ポリマー
セメント比（セメントに対するポリマー固型分の
重量比）で好ましくは３〜20％とくに好ましくは
５〜10％の範囲である。この範囲未満では水硬性
物質の脱落防止が不十分であり、この範囲を越え
て配合すると透水性が低下する。
水硬性物質およびポリマーは、その合計重量が
基材布を水中に投じた場合に浮き上がらない重量
になるように基材布中に充填するが、概ね基材布
重量と同量以上が好ましい。また上限はないもの
の、多量の使用は重量が重くなりすぎるうえ、基
材布内部に充填されきれず基材布表面を水硬性物
質らが覆うようになり、運搬時、施工時に表面の
水硬性物質が砕損し、くずなどが発生して取扱い
性が悪くなるので概ね基材布重量の８倍量まで好
ましい。とくに透水性をも兼ね備えさせるには、
基材布重量と同重量ないし４倍程度のものが、土
木シートの垂直方向透水係数が0.1cm／sec以下、
多くは10-2以下となり、砂と同等の透水性能を示
し好適である。
本発明の土木シートを製造するには、種々の方
法が考えられるが、たとえば基材布の少なくとも
一方の面に、水硬性物質とポリマー懸濁液を含む
スラリーをフラツシユし、振動力または吸引力で
もつてスラリーを強制的に基材布内部まで浸透さ
せ、しかるのち加熱して養生し、水硬性物質と懸
濁液の固型分を硬化させて一体化する方法があ
る。
ポリマー懸濁液は、セメント配合用として知ら
れている種々のものが使用でき、具体的にはゴム
ラテツクス、熱可塑性樹脂エマルジヨン、熱硬化
性樹脂エマルジヨン、歴青質エマルジヨン、ある
いはこれらの混合物などがある。これらのうちで
も、ゴムラテツクスまたは熱可塑性樹脂エマルジ
ヨンが好適であり、とくにゴムラテツクスが好ま
しい。ゴムラテツクスとしてはたとえば天然ゴム
（NR）、クロロプレンゴム（CR）、スチレン・ブ
タジエンゴム（SBR）、アクリロニトリル・ブタ
ジエンゴム（NBR）、ブチルゴム（IIR）、ブタジ
エン・メチルメタクリレートゴム（MBR）のラ
テツクスを挙げることができる。また熱可塑性樹
脂エマルジヨンとしてはたとえばポリ酢酸ビニ
ル、ポリ塩化ビニル、ポリ塩化ビニリデン、ポリ
（メタ）アクリル酸メチル、アイオノマーあるい
はポリエチレン、ポリプロピレンなどのポリオレ
フイン更に変性によつてカルボキシル基を導入さ
せたポリオレフインなどのエマルジヨンを挙げる
ことができる。懸濁液の固型分濃度はとくに制限
はないが、作業性の面からは概ね70重量％以下の
ものが好ましい。
懸濁液の水硬性物質の配合量は、ポリマーセメ
ント比で３〜20％になるように配合する。
より具体的な方法を図面を用いて説明する。
第１図には本発明の土木シートを製造するのに
好適な方法が示してある。実質的に合成樹脂フイ
ラメントからなる編織布および／または不織布の
基材布２は原反ロール１より連続的にスラリーフ
ラツシユ工程に送られる。フラツシユ工程では、
水硬性物質、ポリマー懸濁液および必要に応じて
水とからなるスラリーをフラツシヤー３によつて
基材布にフラツシユし、吸引機４によりフラツシ
ユされたスラリーを基材布内部に浸透させる。次
いで基材布は反転させられ、再びフラツシユ工程
にかけられて、裏面側にスラリーがフラツシユさ
れ、内部に浸透させられる。表裏両面よりスラリ
ーがフラツシユされた基材布は、加熱機５に搬入
されて水蒸気によつて加熱、養生され、水硬性物
質およびポリマー懸濁液中の固型分は硬化し、基
材布と一体化して土木シートが得られる。次に得
られた土木シートは離型フイルム６と共に巻き取
り機７によつて巻き取られる。この方法ではフラ
ツシユされたスラリーを内部にまで浸透させる方
法として吸引機４の吸引力を使用したが、別には
機械的な振動を与えることによつて自重により基
材布内部へ浸透させてもよい。尚、ここで水硬性
物質等のスラリー中に基材布を浸漬して基材布中
に水硬性物質を浸透させる方法は、基材布の表面
のみに水硬性物質が付着するばかりで内部深くま
で浸透しないので、前述したような取扱い性の不
便さが生じるので好ましくない。
本発明の土木シートの態様を示すと、不織布と
水硬性物質とを一体化したもの、編織布と水硬性
物質を一体化したもの、不織布と編織布の積層物
と水硬性物質を一体化したもの、さらにこれらを
金網やプラスチツクネツトで補強したものが例示
できる。
〔実施例〕
以下本発明の最も好適な態様を実施例で示す
が、本発明はとくにことわりのない限りこれらの
実施例に制約されるものではない。
実施例 １〜４
ポリプロピレン長繊維（12デニール）からなる
不織布（目付け重量400ｇ／m2）の両面上に、普
通ポルトランドセメント：水：SBRラテツクス
（50重量％）＝１：１：0.2の重量比割合からなる
スラリーを表１に示す割合となるようにフラツシ
ヤーによりフラツシユし、加熱養生した。得られ
たシートの性能を表１に示す。
尚ここで引張り特性はJIS Ｌ 1085、透水係数
はJIS Ａ 1218の方法に準じて行い、セメント脱
落量は20cm×20cmのシート片を手もみして脱落し
た量を測定した。
実施例 ５〜６
実施例１と同じ不織布の両面上に、普通ポルト
ランドセメント：水：SBRラテツクス（50重量
％）＝１：１：0.6の重量比割合からなるスラリー
を表１に示す割合となるようにフラツシヤーによ
りフラツシユし、加熱養生した。得られたシート
の性能を表１に示す。
比較例 １
実施例１の不織布の両面上に、普通ポルトラン
ドセメント：水＝１：１の重量比割合からなるス
ラリーをフラツシユし、加熱養生した。得られた
シートの性能を表１に示す。
[Field of Application of the Invention] The present invention relates to a civil engineering sheet, and more specifically, it is installed in places that come into contact with water, such as sunken bed mats, anti-scouring mats, and friction mats, to prevent the sinking of structures and the carrying out of earth and sand by running water. This invention relates to a civil engineering sheet suitable for. [Conventional technology] When constructing structures that come into contact with water systems, such as coasts, river banks, and breakwaters in lakes and marshes, running water washes away the earth and sand at the foundations, causing the structures to tilt or disappearing, such as tetrapods. When wave equipment is installed on a quay, the ocean floor is gouged out by the scour, causing groups of tetrapods to collapse. To prevent this phenomenon,
Civil engineering sheets, commonly referred to as sunken bed mats or anti-sinking mats, are laid on the ground near the foundations of structures or on the ground where tetrapots are installed to prevent earth and sand from being carried away by the power of running water. Civil engineering sheets used for these purposes can generally be divided into two types. That is, one is a waterproof sheet such as a rubber sheet, a plastic sheet, or an asphalt sheet, and the other is a water-permeable sheet made of natural fibers such as coconut fiber or white fiber, or a water-permeable sheet that is a combination of this sheet and a reinforcing agent such as wire mesh. It is. In the case of the former sheet, if it is used to prevent scouring, drainage treatment measures must be taken at spring sites where water comes out from the ground, and sheet wave damage and its propagation due to protrusions and water pressure must be taken. In order to prevent this, there are problems such as the need to thicken the sheet itself. On the other hand, since the latter sheet is permeable, water can freely flow in and out, and only sand and mud can be prevented from flowing out, and since it is highly elongated and relieves stress, problems like the former do not occur. However, the specific gravity of this water-permeable sheet is generally about the same as that of water. When installing the sheet in water or at the waterside, the sheet floats or floats up in the water, making it difficult to install, and even if it can be installed, it cannot be laid in a predetermined position, resulting in poor workability. To solve this problem, there is a natural fiber sheet reinforced with wire mesh, which has the effects of both reinforcing the sheet and increasing its specific gravity.
However, wire mesh is easily corroded by water, especially seawater, and is not very desirable. As a modification of this method, there is a method using a plastic net, but with this method, it is difficult to increase the specific gravity, and the improvement in sedimentation property as described above cannot be expected. Therefore, in Japanese Patent Application No. 59-43870, the present applicant proposed a water-permeable sheet with good sedimentation properties in water.
We proposed a civil engineering sheet with excellent strength. That is,
This civil engineering sheet is a sheet in which a woven fabric and/or non-woven fabric substantially made of synthetic resin filament and a hydraulic substance are integrated. As a result of further research using this civil engineering sheet, the present applicant found that
Although the intended purpose could be achieved, unexpectedly, the hydraulic material that is integrated with the civil engineering sheet easily comes off when the sheet is bent, resulting in hydraulic material powder flying up during work. It was found that there is a risk of temporarily suspending the water at the installation site. [Problems to be Solved by the Invention] In view of the above-mentioned problems, the inventors of the present invention have continued to investigate whether it is possible to improve the prevention of the separation of hydraulic substances. By integrating hydraulic materials, the purpose can be achieved, and unexpectedly, the flexibility of the civil engineering mat itself is improved, resulting in a civil engineering sheet that has good handling, workability, and conformability to the shape of the ground. It turned out that it was possible. [Means for Solving the Problems] That is, the present invention is a fabric in which a hydraulic material in which a polymer is dispersed is filled into the interfilament spaces of a woven fabric and/or a nonwoven fabric substantially consisting of synthetic resin filaments and integrated. The invention also relates to a civil engineering sheet characterized in that it contains a hydraulic substance and a polymer suspension on at least one side of a woven fabric and/or a nonwoven fabric substantially consisting of a synthetic resin filament. The present invention relates to a method for producing a civil engineering sheet, characterized by flashing a slurry containing a liquid, allowing the slurry to penetrate into the interior of a base fabric by vibration or suction, and then heating and curing to harden and integrate. [Function] Of the knitted or nonwoven fabrics that serve as the base fabric of the present invention, the former should be knitted with bulky filaments as much as possible, and should have fairly large gaps between the filaments. Specifically, it is preferable to have a space between the filaments that is large enough to be filled with an amount of hydraulic material equal to or more than its own weight. The latter can provide the most suitable civil engineering sheet in the present invention. In other words, when filaments are bundled into a sheet using melt bonding, adhesives, needle punching, sewing, etc., they are bulky and have large gaps between them, so it is necessary to fill the gaps with a hydraulic substance equal to or more than the weight of the filaments. It is possible to maintain water permeability. Among these, spunpond nonwoven fabrics are suitable because of their excellent tensile strength and elasticity. Suitable nonwoven fabrics have a thickness of 2 to 8 mm and a basis weight.
100~800g/ m2 , especially 200g/ m2 ~800g/ m2 , 5
A material with a tensile strength per cm width of 50 to 200 kg, especially one with high elongation, is good. The filaments constituting the above-mentioned base cloth are synthetic fibers or, if necessary, mixed with a small amount of natural fibers. Since natural fibers alone have low strength, the civil engineering sheet becomes too brittle when integrated with the hydraulic material described below. The synthetic fiber may be made of any known synthetic resin such as polyolefin, polyester, polyamide, etc. Particularly suitable among these are polyolefins, which have excellent water resistance, chemical resistance, and alkali resistance.
Examples include polyethylene and polypropylene. The most preferred embodiment of the base fabric of the present invention is a continuous filament nonwoven fabric obtained by a spunpond method using polyolefin, particularly polypropylene, as a raw material. In particular, a method using needle punching as a method for three-dimensionally entangling the fibers is suitable because the hydraulic substance easily penetrates into the inside of the nonwoven fabric. The hydraulic material is cement, mortar, etc., and does not contain large-sized sand or gravel. If large particles are mixed in, these particles will clog the interfilament spaces on the surface of the base fabric, preventing the hydraulic substance from penetrating into the interior of the base fabric. Various polymers known for use in cement formulations can be used, including rubber, thermoplastic resins, thermosetting resins, bituminous materials, and mixtures thereof. Among these, rubber or thermoplastic resin, particularly rubber, is preferred. Examples of the rubber include natural rubber (NR), chloroprene rubber (CR), styrene-butadiene rubber (SBR), acrylonitrile-butadiene rubber (NBR), butyl rubber (IIR), and butadiene-methacrylate rubber (NBR).
Examples of thermoplastic resins include polyvinyl acetate,
Examples thereof include polyvinyl chloride, polyvinylidene chloride, polymethyl poly(meth)acrylate, ionomers, polyolefins such as polyethylene and polypropylene, and polyolefins into which carboxyl groups have been introduced by modification. The proportion of the hydraulic substance and the polymer is preferably in the range of 3 to 20%, particularly preferably 5 to 10%, in terms of polymer cement ratio (weight ratio of polymer solids to cement). If it is less than this range, prevention of hydraulic substances from falling off will be insufficient, and if it is blended beyond this range, water permeability will decrease. The hydraulic substance and the polymer are filled into the base cloth so that the total weight thereof will not float when the base cloth is thrown into water, but it is preferable that the total weight is equal to or more than the weight of the base cloth. Although there is no upper limit, if a large amount is used, the weight becomes too heavy, and the material cannot be filled inside the base fabric, causing the surface of the base fabric to be covered with hydraulic substances. It is preferable to use up to about 8 times the weight of the base fabric since the substance may be crushed and debris may be generated, making it difficult to handle. In particular, in order to have water permeability,
The vertical permeability coefficient of the civil engineering sheet is 0.1cm/sec or less when the weight is the same as or four times the weight of the base fabric.
In most cases, it has a value of 10 -2 or less, which means it has water permeability equivalent to that of sand, making it suitable. Various methods can be used to produce the civil engineering sheet of the present invention, but for example, a slurry containing a hydraulic substance and a polymer suspension is flashed onto at least one surface of a base fabric, and vibration or suction force is applied. There is a method in which the slurry is forcibly penetrated into the interior of the base fabric, and then heated and cured to harden and integrate the hydraulic substance and the solid content of the suspension. Various polymer suspensions known for use in cement formulations can be used, including rubber latexes, thermoplastic resin emulsions, thermosetting resin emulsions, bituminous emulsions, or mixtures thereof. . Among these, rubber latex or thermoplastic resin emulsion is preferred, and rubber latex is particularly preferred. Examples of rubber latexes include latexes of natural rubber (NR), chloroprene rubber (CR), styrene-butadiene rubber (SBR), acrylonitrile-butadiene rubber (NBR), butyl rubber (IIR), and butadiene-methyl methacrylate rubber (MBR). Can be done. Examples of thermoplastic resin emulsions include polyvinyl acetate, polyvinyl chloride, polyvinylidene chloride, polymethyl acrylate, ionomers, polyolefins such as polyethylene and polypropylene, and polyolefins into which carboxyl groups have been introduced by modification. Emulsions can be mentioned. There is no particular restriction on the solid content concentration of the suspension, but from the viewpoint of workability, it is preferably approximately 70% by weight or less. The amount of the hydraulic substance in the suspension is 3 to 20% based on the polymer cement ratio. A more specific method will be explained using drawings. FIG. 1 shows a preferred method for manufacturing the civil engineering sheet of the present invention. A textile fabric and/or non-woven fabric base fabric 2 consisting essentially of synthetic resin filaments is continuously sent from a raw fabric roll 1 to a slurry flashing process. In the flashing process,
A slurry consisting of a hydraulic substance, a polymer suspension, and optionally water is flashed onto the base fabric by a flasher 3, and a suction device 4 causes the flushed slurry to permeate into the interior of the base fabric. The base fabric is then turned over and subjected to the flashing process again to flash the slurry on the back side and permeate the inside. The base cloth with the slurry flushed from both the front and back sides is carried into the heating machine 5, where it is heated and cured by steam, the hydraulic substance and the solid content in the polymer suspension are hardened, and the base cloth is combined with the base cloth. Civil engineering sheets can be obtained by integrating. Next, the obtained civil engineering sheet is wound up together with a release film 6 by a winding machine 7. In this method, the suction force of the suction device 4 is used to make the fluffed slurry penetrate into the inside, but it may also be applied mechanical vibration to make it penetrate into the inside of the base fabric by its own weight. . Note that the method of soaking the base fabric in a slurry of a hydraulic substance or the like to allow the hydraulic substance to penetrate into the base fabric only causes the hydraulic substance to adhere to the surface of the base fabric, but not deep inside. This is not preferable because the inconvenience caused in handling as described above occurs. Examples of the civil engineering sheets of the present invention include those in which a nonwoven fabric and a hydraulic material are integrated, those in which a woven fabric and a hydraulic material are integrated, and those in which a laminate of a nonwoven fabric and a woven fabric and a hydraulic material are integrated. For example, these may be reinforced with wire mesh or plastic net. [Examples] The most preferred embodiments of the present invention will be shown in Examples below, but the present invention is not limited to these Examples unless otherwise specified. Examples 1 to 4 A weight ratio of ordinary Portland cement:water:SBR latex (50% by weight) = 1:1:0.2 was applied on both sides of a nonwoven fabric (bare weight 400g/ m2 ) made of polypropylene long fibers (12 denier). The slurry having the proportions shown in Table 1 was flashed using a flasher and cured by heating. Table 1 shows the performance of the obtained sheet. The tensile properties were measured in accordance with JIS L 1085, the hydraulic conductivity was measured in accordance with JIS A 1218, and the amount of cement falling off was measured by rubbing a 20 cm x 20 cm sheet piece by hand and measuring the amount of cement falling off. Examples 5 to 6 On both sides of the same nonwoven fabric as in Example 1, a slurry consisting of a weight ratio of ordinary Portland cement: water: SBR latex (50% by weight) = 1:1:0.6 was prepared as shown in Table 1. It was flashed using a flasher and cured under heat. Table 1 shows the performance of the obtained sheet. Comparative Example 1 A slurry having a weight ratio of ordinary Portland cement and water of 1:1 was flashed on both sides of the nonwoven fabric of Example 1, and the slurry was heated and cured. Table 1 shows the performance of the obtained sheet.
本発明の土木シートは、
水中での沈降性がよい、
強度に優れ、
可撓性に富み、
砂なみの高い透水性を有し、
水硬性物質の脱落が少ない
といつた性質を示すので、沈床マツト、洗堀防止
マツト、摩擦マツトといつた水と接触する用途に
用いると、水を懸濁させることなく敷設可能であ
る。
The civil engineering sheet of the present invention exhibits properties such as good sedimentation properties in water, excellent strength, high flexibility, high water permeability comparable to sand, and less shedding of hydraulic substances. When used in applications that come into contact with water, such as sunken bed mats, scour prevention mats, and friction mats, they can be laid without suspending water.
第１図は、本発明の製法を示す一実施例図であ
る。
１…原反ロール、３…フラツシヤー、４…吸収
機、５…加熱機。
FIG. 1 is an embodiment diagram showing the manufacturing method of the present invention. 1... Original fabric roll, 3... Flusher, 4... Absorber, 5... Heating machine.
Claims (1)
布および／または不織布のフイラメント間空隙中
に、ポリマーの分散した水硬性物質が充填されて
一体化していることを特徴とする土木シート。 ２ 垂直方向透水係数が0.1cm／sec以下である特
許請求の範囲第１項記載の土木シート。 ３ 水硬性物質およびポリマーの量が基材の編織
布および／または不織布重量の等量以上に充填さ
れている特許請求の範囲第１項または第２項に記
載の土木シート。 ４ 基材布が不織布である特許請求の範囲第１項
ないし第３項のいずれかに記載の土木シート。 ５ 不織布が厚み２〜８mm、目付け重量100〜800
ｇ／m2である特許請求の範囲第４項記載の土木シ
ート。 ６ ポリマーがゴムまたは熱可塑性樹脂である特
許請求の範囲第１項ないし第５項のいずれかに記
載の土木シート。 ７ ゴムが天然ゴム、クロロプレンゴム、スチレ
ン・ブタジエンゴム、アクリロニトリル・ブタジ
エンゴム、ブチルゴムおよびブタジエン・メチル
メタクリレートゴムからなる群より選ばれる少な
くとも１種以上である特許請求の範囲第６項記載
の土木シート。 ８ ポリマーセメント比が３〜20％である特許請
求の範囲第１項ないし第７項のいずれかに記載の
土木シート。 ９ 実質的に合成樹脂フイラメントからなる編織
布および／または不織布の少なくとも一方の面
に、水硬性物質とポリマー懸濁液を含むスラリー
をフラツシユし、振動または吸引力によつてスラ
リーを基材布内部まで浸透させ、その後加熱・養
生して硬化一体化することを特徴とする土木シー
トの製法。 １０ ポリマー懸濁液がゴムラテツクスまたは熱
可塑性樹脂エマルジヨンである特許請求の範囲第
９項記載の土木シートの製法。 １１ ゴムラテツクスが天然ゴムラテツクス、ク
ロロプレンゴムラテツクス、スチレン・ブタジエ
ンゴムラテツクス、アクリロニトリル・ブタジエ
ンゴムラテツクス、ブチルゴムラテツクスおよび
ブタジエン・メチルメタクリレートゴムラテツク
スからなる群より選ばれる少なくとも１種以上で
ある特許請求の範囲第１０項記載の土木シート。[Scope of Claims] 1. A civil engineering sheet characterized in that a hydraulic material in which a polymer is dispersed is filled and integrated into the inter-filament voids of a knitted woven fabric and/or non-woven fabric substantially consisting of synthetic resin filaments. . 2. The civil engineering sheet according to claim 1, which has a vertical hydraulic conductivity of 0.1 cm/sec or less. 3. The civil engineering sheet according to claim 1 or 2, wherein the hydraulic substance and the polymer are filled in an amount equal to or more than the weight of the textile fabric and/or nonwoven fabric of the base material. 4. The civil engineering sheet according to any one of claims 1 to 3, wherein the base fabric is a nonwoven fabric. 5 Non-woven fabric has a thickness of 2 to 8 mm and a basis weight of 100 to 800
The civil engineering sheet according to claim 4, which has a particle size of g/m 2 . 6. The civil engineering sheet according to any one of claims 1 to 5, wherein the polymer is rubber or thermoplastic resin. 7. The civil engineering sheet according to claim 6, wherein the rubber is at least one selected from the group consisting of natural rubber, chloroprene rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber, butyl rubber, and butadiene-methyl methacrylate rubber. 8. The civil engineering sheet according to any one of claims 1 to 7, having a polymer cement ratio of 3 to 20%. 9 A slurry containing a hydraulic substance and a polymer suspension is flashed onto at least one surface of a knitted fabric and/or a nonwoven fabric substantially consisting of synthetic resin filaments, and the slurry is applied to the inside of the base fabric by vibration or suction force. A manufacturing method for civil engineering sheets, which is characterized by allowing the material to penetrate up to 100 degrees, and then heating and curing to harden and integrate. 10. The method for producing a civil engineering sheet according to claim 9, wherein the polymer suspension is a rubber latex or a thermoplastic resin emulsion. 11. A patent claim in which the rubber latex is at least one selected from the group consisting of natural rubber latex, chloroprene rubber latex, styrene-butadiene rubber latex, acrylonitrile-butadiene rubber latex, butyl rubber latex, and butadiene-methyl methacrylate rubber latex. Civil engineering sheet as described in item 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27406384A JPH0228544B2 (en) | 1984-12-27 | 1984-12-27 | DOBOKUSHIITOOYOBISONOSEIHO |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27406384A JPH0228544B2 (en) | 1984-12-27 | 1984-12-27 | DOBOKUSHIITOOYOBISONOSEIHO |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61155270A JPS61155270A (en) | 1986-07-14 |
| JPH0228544B2 true JPH0228544B2 (en) | 1990-06-25 |
Family
ID=17536448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27406384A Expired - Lifetime JPH0228544B2 (en) | 1984-12-27 | 1984-12-27 | DOBOKUSHIITOOYOBISONOSEIHO |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0228544B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050103707A1 (en) * | 2003-11-19 | 2005-05-19 | Amcol International Corporation | Contaminant-reactive geocomposite mat and method of manufacture and use |
| US9067383B2 (en) | 2004-09-16 | 2015-06-30 | United States Gypsum Company | Flexible and rollable cementitious membrane and method of manufacturing it |
| US20060188674A1 (en) * | 2005-01-24 | 2006-08-24 | Mark Fernette | Cement-based hydraulic flexible composites and package therefor |
-
1984
- 1984-12-27 JP JP27406384A patent/JPH0228544B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61155270A (en) | 1986-07-14 |
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| EXPY | Cancellation because of completion of term |