JP5051710B2 - Cement admixture package, method for producing the same, and method for adding cement admixture - Google Patents
Cement admixture package, method for producing the same, and method for adding cement admixture Download PDFInfo
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Description
本発明は、セメント混和材包装体、その製造方法、及びセメント混和材の添加方法に関する。 The present invention relates to a cement admixture package, a method for producing the same, and a method for adding a cement admixture.
繊維を添加した繊維補強のモルタル及びコンクリート、爆裂防止用繊維を添加した高強度コンクリート成形体、構造物等は、各種の建築材料や土木材料として広く使われており、定められた添加量の繊維を、モルタルやコンクリート中に均等に分散することが重要である。モルタル又はコンクリートヘの繊維の添加方法としては、モルタル又はコンクリートのセメントスラリーをミキシングプラントで練り混ぜる時点で、ミキサヘ投入するのが一般的である。
ミキシングプラントにおけるような専用の計量・投入装置を使用せずに繊維を計量し、少量ずつ投入するには人手、手間、時間がかかり、安全性の他、計量や投入時に繊維等の混和材がこぼれたり、飛び散ったりして汚れる等作業環境にも問題がある。そのため前もって所定量の繊維を、スラリー内の水分で溶解ないしは崩壊する高分子等からなるシートで包装しておき、梱包したまま投入する提案がなされている（例えば、特許文献１参照。）。
Fiber-reinforced mortar and concrete with added fibers, high-strength concrete moldings with added explosion-proof fibers, and structures are widely used as various building materials and civil engineering materials. It is important that the be dispersed evenly in the mortar or concrete. As a method for adding fibers to mortar or concrete, it is common to add the mortar or concrete cement slurry to a mixer at the time of mixing in a mixing plant.
It takes manpower, labor, and time to weigh and add small amounts of fiber without using a dedicated weighing / dispensing device as in a mixing plant. There are also problems in the working environment, such as spilling and splashing and getting dirty. Therefore, a proposal has been made in which a predetermined amount of fiber is packed in advance with a sheet made of a polymer or the like that dissolves or disintegrates with moisture in the slurry, and is put in the package (for example, see Patent Document 1).
しかし、混和用短繊維は、生産性の点から湿式法にて後延伸し、これを短繊維状に切断、しかる後、乾燥処理、梱包処理をしようとすると、混和用短繊維は、通常の繊維のように捲縮を有していないため取扱いが難しい。そのため、湿式法で製造した短繊維は、乾燥工程を経ることなく直接梱包することが製造上望ましく、この場合当然水分を含んでいるので、特許文献１記載の如き水で溶解ないしは崩壊する高分子等からなるシートを用いて、含水短繊維を直接包装することはできない。このように、特許文献１に記載の如き水で溶解ないしは崩壊する高分子等からなるシートでは、僅かな水分でもシートがべたつき、特に１５％以上の含水短繊維では、シートが極端に弱くなり、取り扱い不能になったり、破損したりする。つまり、セメント混和材として、モルタル又はコンクリートに直接投入可能な包装体は、含水短繊維を充填すれば、当該繊維の水分によっても、包装体が極端に弱くなり、取り扱い不能になったり、破損したりするとういう基本的な矛盾をはらんでいる。
以上、従来においては、含水短繊維、とりわけ短繊維製造工程において１５％以上の水分を含む短繊維をセメント混和材としてモルタル又はコンクリートに投入できる包装体とする技術は提案されていない。
However, the short fibers for mixing are post-stretched by a wet method from the viewpoint of productivity, cut into short fibers, and then subjected to drying treatment and packing treatment. It is difficult to handle because it does not have crimps like fiber. Therefore, it is desirable in production that the short fiber produced by the wet method is directly packed without going through a drying step. In this case, naturally, since it contains water, a polymer that dissolves or disintegrates in water as described in Patent Document 1. It is not possible to directly wrap the water-containing short fibers using a sheet made of or the like. Thus, in a sheet made of a polymer or the like that dissolves or disintegrates in water as described in Patent Document 1, the sheet becomes sticky even with a slight amount of water, particularly with 15% or more water-containing short fibers, the sheet becomes extremely weak, It becomes impossible to handle or is damaged. In other words, as a cement admixture, a package that can be directly put into mortar or concrete is filled with water-containing short fibers, so that the package becomes extremely weak due to the moisture of the fibers, making it unusable or damaged. There is a basic contradiction.
As described above, there has not been proposed a technique for forming a package capable of charging hydrous short fibers, particularly short fibers containing 15% or more of moisture in the short fiber manufacturing process, into mortar or concrete as a cement admixture.
本発明は、上記の矛盾する問題点を克服するためになされたものであって、含水状の短繊維を充填した包装体となし、その後、これをセメント混和材として、直接投入添加できるセメント混和材包装体、及びその製造方法、モルタル又はコンクリートへの添加方法を提供することを目的とする。 The present invention has been made in order to overcome the above-mentioned contradictory problems, and is a package filled with hydrated short fibers, which can then be directly added and added as a cement admixture. It aims at providing the material packaging body and its manufacturing method, the addition method to mortar or concrete.
本発明者らは、この矛盾する問題点を克服するため鋭意検討を行なった結果、外側に水解紙を配した水溶性フィルムからなる包装材料で形成された容器であれば、含水状の短繊維を含むセメント混和材を充填しても、最終的に直接添加使用できる包装体とすることができることを見出した。
すなわち、本発明は、
（１）外側に水解紙を配した水溶性フィルムからなる包装材料で形成された容器中に、投入当初において含水率１５％以上の短繊維を含むセメント混和材を充填したセメント混和材包装体であって、前記水溶性フィルムにエンボス加工が施されてなることを特徴とするセメント混和材包装体、
（２）包装材料の水溶性フィルムがポリビニルアルコール系水溶性樹脂からなる前記（１）記載のセメント混和材包装体、
（３）容器を水溶性フィルムと水解紙を重ね合わせて袋状に形成してなる前記（１）又は（２）記載のセメント混和材包装体、
（４）含水状の短繊維を含むセメント混和材を、外側に水解紙を配した水溶性フィルムからなる包装材料で形成された容器中に充填し、容器の開口部をシールするか又はシールすることなく、集積保管し、短繊維が内包する水分が含水率２０％以下になるまで揮散せしめることを特徴とするセメント混和材包装体の製造方法、及び
（５）前記（１）〜（３）のいずれかに記載のセメント混和材包装体をモルタル又はコンクリートスラリー内に投入することを特徴とするセメント混和材の添加方法、
を提供するものである。
As a result of intensive studies to overcome the contradictory problems, the present inventors have determined that if the container is formed of a packaging material made of a water-soluble film with hydrolytic paper on the outside, it is a hydrous short fiber. It has been found that even when filled with a cement admixture containing, a package can be finally added and used.
That is, the present invention
(1) A cement admixture packaging body in which a cement admixture containing short fibers having a water content of 15% or more is initially filled in a container formed of a packaging material made of a water-soluble film with hydrolytic paper on the outside. A cement admixture package characterized in that the water-soluble film is embossed .
(2) The cement admixture package according to (1), wherein the water-soluble film of the packaging material is made of a polyvinyl alcohol-based water-soluble resin,
(3) The cement admixture package according to (1) or (2), wherein the container is formed into a bag shape by overlapping a water-soluble film and water-disintegrating paper,
( 4 ) A cement admixture containing hydrated short fibers is filled into a container formed of a packaging material made of a water-soluble film with hydrolytic paper on the outside, and the opening of the container is sealed or sealed. Without being collected and stored and volatilized until the moisture contained in the short fibers is 20% or less, and ( 5 ) the above-mentioned (1) to ( 3 ) A method for adding a cement admixture, wherein the cement admixture package according to any one of the above is put into mortar or concrete slurry,
Is to provide.
本発明のセメント混和材包装体は、モルタル又はコンクリートの調合時にこのセメント混和材包装体を直接添加（投入）すれば、包装材料としての、水解紙はセメントの混和水によって解離分散し、水溶性フィルムは溶解し、内部に充填された短繊維を含むセメント混和材がモルタル又はコンクリート中に拡散混合されて、その性能を発現できる状態とすることができる。このため、従来のごとく、現場で混和材としての繊維を正確に計量して、投入する作業を要せず、モルタル又はコンクリートの混練作業の省力化、作業環境の改善を図ることができる。
本発明のセメント混和材包装体の製造方法は、量産に適した湿式延伸法による含水状の短繊維であっても、延伸、短繊維カット後に乾燥工程や計量・梱包工程を経る必要がないので、短繊維や、捲縮を有しない繊維であることによる取り扱い難さを回避して、セメント混和材包装体とすることができ、製造工程の省力化と、エネルギーコストの低減を図ることができる。
When the cement admixture package of the present invention is directly added (input) when mortar or concrete is mixed, the water-disintegrating paper as the packaging material is dissociated and dispersed by the admixture water of the cement. The film dissolves, and a cement admixture containing short fibers filled therein can be diffused and mixed in mortar or concrete so that the performance can be expressed. For this reason, it is not necessary to accurately measure and add fibers as an admixture in the field as in the prior art, and it is possible to save labor and improve the working environment of mortar or concrete kneading work.
The manufacturing method of the cement admixture packaging body of the present invention does not require a drying process or a weighing / packaging process after drawing and cutting the short fibers, even if they are water-containing short fibers by a wet drawing method suitable for mass production. In addition, it is possible to avoid the difficulty of handling due to short fibers and fibers that do not have crimps, and to make a cement admixture packaging body, thereby saving labor in the manufacturing process and reducing energy costs. .
本発明のセメント混和材包装体は、外側に水解紙を配した水溶性フィルムからなる包装材料で形成された容器中に、短繊維を含むセメント混和材を充填したことを特徴とする。
本発明のセメント混和材包装体に使用可能な水溶性フィルムとしては、水中で溶解ないし崩壊する材料として、たとえば、水溶性ポリビニルアルコール系材料やポリアクリル酸ナトリウム、プルラン等の微生物多糖類等が挙げられるがこれらに限定されるものではない。
飽和吸水率が高いなどの観点からポリビニルアルコール系水溶性樹脂からなる水溶性フィルムが好ましい。水溶性ポリビニルアルコール系フィルムとしては、５℃の冷水でも可溶な冷水可溶性タイプ（以下、「Ａタイプ」ということがある。）や、２５℃の温水に可溶な温水可溶タイプ（以下、「Ｂタイプ」ということがある。）等を挙げることができるが、本発明のセメント混和材包装体においては、いずれも使用することができる。なお、ポリビニルアルコールの溶解温度は、一般に分子量やけん化度等と関連する。
水溶性フィルムの厚みとしては、ポリビニルアルコール系フィルムの場合、厚くなれば取扱易いが、非重量物用の２５μm〜５０μmの範囲では、取り扱い上の差はほとんどなく、これらの厚みの範囲が包装材料としてのコストの観点からも好ましい。
The cement admixture package of the present invention is characterized in that a cement admixture containing short fibers is filled in a container formed of a packaging material made of a water-soluble film having hydrolytic paper on the outside.
Examples of water-soluble films that can be used in the cement admixture package of the present invention include materials that dissolve or disintegrate in water, such as water-soluble polyvinyl alcohol materials, microbial polysaccharides such as sodium polyacrylate and pullulan, and the like. However, it is not limited to these.
A water-soluble film made of a polyvinyl alcohol-based water-soluble resin is preferable from the viewpoint of high saturated water absorption. As a water-soluble polyvinyl alcohol-based film, a cold water soluble type that is soluble even in cold water at 5 ° C. (hereinafter sometimes referred to as “A type”), or a hot water soluble type that is soluble in hot water at 25 ° C. (hereinafter referred to as “water type”). In some cases, any of them can be used in the cement admixture package of the present invention. The dissolution temperature of polyvinyl alcohol is generally related to the molecular weight, the degree of saponification, and the like.
As for the thickness of the water-soluble film, in the case of a polyvinyl alcohol film, it is easy to handle if it is thick, but in the range of 25 μm to 50 μm for non-heavy objects, there is almost no difference in handling, and the range of these thicknesses is the packaging material It is also preferable from the viewpoint of cost.
水溶性フィルムの外側に配される水解紙は、モルタルやコンクリートに包装体を添加（投入）して混合した場合の分散性の観点から、トイレットペーパーのように、日本工業規格ＪＩＳ Ｐ ４５０１の「ほぐれやすさ」に適合していることが望ましい。坪量の影響において、市販の１９ｇ／ｍ2以上であれば包装時及び保管時には差はないが、投入時の取扱いにおいて、引き剥がす必要がある場合の剥がし易さでは差が発生し、水溶性フィルムとの癒着がしにくいという点で、坪量２５ｇ／ｍ2以上がより好ましい。
水解紙のパルプは、モルタルやコンクリート混合物内に残る。その繊維状物（パルプ）がモルタル／コンクリートの硬化後、ひび割れ防止に効果があるとの提案もあるが、できるだけ不純物を除きたい場合もあり、その場合は、取扱いが可能な程度迄水分が放出するまで放置した後、外側の紙を剥がして投入すればよく、その場合は、水解紙の目付けが大きいほど容易に剥がすことができる。
From the viewpoint of dispersibility when a package is added (input) to mortar or concrete and mixed with water disintegrating paper arranged outside the water-soluble film, like the toilet paper, the Japanese Industrial Standard JIS P 4501 “ It is desirable that it conforms to “easy to loosen”. Under the influence of basis weight, there is no difference at the time of packaging and storage if it is 19 g / m 2 or more on the market, but there is a difference in ease of peeling when it is necessary to peel off during handling at the time of input, and it is water-soluble. A basis weight of 25 g / m 2 or more is more preferable because it is difficult to adhere to the film.
Hydrolytic pulp remains in the mortar or concrete mixture. There is also a suggestion that the fibrous material (pulp) is effective in preventing cracking after mortar / concrete hardening, but in some cases it may be desirable to remove impurities as much as possible, in which case moisture is released to the extent that it can be handled. Then, the outer paper may be peeled off and put in. In that case, the larger the basis weight of the hydrolyzed paper, the easier it can be peeled off.
なお本発明においては、外側に水解紙を配された水溶性フィルムからなる包装材料で形成された容器中に充填された、含水率１５％以上の短繊維を含むセメント混和材の水分が水溶性フィルム層に浸入・膨潤した際、外側に接する水解紙によって水分は速やかに吸収・拡散される。紙側に移動した水分は外気に開放されているため速やかに放出され、水溶性フィルムをゲル状態に保ち、破損に至るゾル状になるのを防止しする。すなわち、水溶性フィルムの外側に配される水解紙は、水溶性フィルム表面から水分を速やかに吸収し、放散させる層として作用すると共に、水分で膨潤し弱くなった水溶性フィルムの補強材として作用し破損を防止する。
従って、水溶性フィルムが強度を保持できる程度に乾燥した後、すなわち、内部の短繊維を含む混和材を投入する時点では、外側の水解紙は、そのパルプを特にモルタル又はコンクリートの混和材として機能させる場合以外は、取り除いてもよいのである。
また、外装の紙は、膨潤し表面がべとついたフィルムをカバーし、包装体として取り扱い易くする効果もある。
In the present invention, the moisture content of the cement admixture containing short fibers having a water content of 15% or more, which is filled in a container made of a water-soluble film with water-soluble paper disposed on the outside, is water-soluble. When the film layer penetrates and swells, moisture is rapidly absorbed and diffused by the hydrolytic paper in contact with the outside. Moisture that has moved to the paper side is quickly released because it is open to the outside air, keeping the water-soluble film in a gel state and preventing it from becoming a sol that can be damaged. In other words, the hydrolytic paper placed outside the water-soluble film acts as a layer that quickly absorbs and dissipates moisture from the surface of the water-soluble film, and also acts as a reinforcing material for the water-soluble film that has been swollen and weakened by moisture. To prevent damage.
Therefore, after the water-soluble film has dried to such an extent that it can retain its strength, that is, when the admixture containing the short fibers inside is added, the outer hydrolytic paper functions as a mortar or concrete admixture. It can be removed except in the case of making it happen.
Further, the outer paper covers the film which is swollen and has a sticky surface, and has an effect of facilitating handling as a package.
本発明のセメント混和材包装体において、セメント混和材としての短繊維としては、特開２０００−３０２４９３号公報に記載されているような爆裂防止繊維としてのポリオレフィン系繊維又はポリビニルアルコール系繊維や、一般的な繊維補強コンクリートに使用されるビニロン繊維、ガラス繊維、炭素繊維等の５〜４０ｍｍの繊維長に切断した短繊維であって、当該短繊維の湿式法による後延伸工程又は、界面活性剤等の水溶液処理によって、水分を含んでいる状態で、袋状等の容器に充填される短繊維状のセメント混和材を対象とする。
短繊維の含水率は、水溶性フィルムが当該短繊維の水分により破損が発生する含水率が下限、短繊維内に水分を遊離することなく保持できる含水率（最大含水率）が上限である。
In the cement admixture package of the present invention, the short fibers as the cement admixture include polyolefin fibers or polyvinyl alcohol fibers as explosion-proof fibers as described in JP-A-2000-302493, Short fibers cut into fiber lengths of 5 to 40 mm, such as vinylon fibers, glass fibers, carbon fibers, etc. used in typical fiber reinforced concrete, a post-stretching step by a wet method of the short fibers, or a surfactant, etc. A short fiber cement admixture filled in a bag-like container in a state of containing water by the aqueous solution treatment.
The moisture content of the short fibers is the lower limit of the moisture content at which the water-soluble film is damaged by the moisture of the short fibers, and the upper limit is the moisture content (maximum moisture content) that can be retained without releasing moisture in the short fibers.
ポリプロピレン短繊維においては、１５％以上の水を含む短繊維を水溶性フィルムのみ、又は水解紙のみで作った袋に入れると袋は崩壊するが、本願の内側に水溶性フィルム、外側に水解紙を配置した複合袋の場合は、最大６０％の水を含んだ短繊維を入れても、袋は崩壊せず、安定に保管できることが確認された。外側の水解紙は必ずしも袋状になっている必要はなく、内袋の外側に配置されているだけよい。
含水率１５％未満の短繊維の場合は、親水性の劣る合成繊維であっても、界面活性剤等で親水化処理されておれば、繊維表面に水分を薄く保持し、繊維が水溶性フィルムに接触しても特別な外力を加えなければ水溶性フィルムがゾル化して破れることはない。含水量が多くなり、繊維表面での水分保持量を超え、水分が遊離する状況になると、当該遊離水と接触する水溶性フィルムがゾル化してしまうので、外に水解紙を添えても袋は崩壊する。
In short polypropylene fibers, when short fibers containing 15% or more of water are placed in a bag made of only water-soluble film or hydrolyzed paper, the bag collapses, but the water-soluble film is on the inside of this application, and hydrolyzed paper is on the outside. In the case of the composite bag in which the bag is placed, it was confirmed that even if a short fiber containing up to 60% water was added, the bag did not collapse and could be stored stably. The outer disintegrating paper does not necessarily have to be in the form of a bag, and only needs to be disposed outside the inner bag.
In the case of a short fiber having a water content of less than 15%, even if it is a synthetic fiber having poor hydrophilicity, if it is hydrophilized with a surfactant or the like, moisture is kept thin on the fiber surface, and the fiber is a water-soluble film. If a special external force is not applied even if it comes into contact with the film, the water-soluble film will not be solated and broken. If the moisture content increases, the moisture retention on the fiber surface exceeds the moisture content, and the water is released, the water-soluble film that comes into contact with the free water will be sol-solated, so the bag will remain even if hydrolytic paper is added outside. Collapse.
水分が遊離することの無い最大含水率は、繊維材質、繊度、親水性処理等に影響されるが、例えばポリプロピレン、１７デシテックス（径４９μm）繊維長１０ｍｍ、親水性界面活性剤０．４％付着では、含水率６０％でも遊離しない。遊離しない最大含水率は、親水性が高く、繊度が小さくなるほど高くなる。 The maximum moisture content at which moisture is not released is affected by the fiber material, fineness, hydrophilic treatment, etc., but, for example, polypropylene, 17 dtex (diameter 49 μm) fiber length 10 mm, hydrophilic surfactant 0.4% adhesion Then, even if the moisture content is 60%, it is not liberated. The maximum moisture content that is not liberated increases with increasing hydrophilicity and decreasing fineness.
本発明の包装体中には、、フレッシュコンクリートの流動性、空気量の変動を制御する目的で、混和剤を加えることもできる。この場合に、加えることのできる混和剤としては、高性能ＡＥ減水剤、高性能減水剤、流動化剤、空気連行剤、消泡剤、収縮低減剤、膨張剤、ポリマー混和剤等の市販の化学混和剤を挙げることができる。
また、短繊維の水分の影響を受ける混和剤では、水分の影響は受けず、モルタル等の混和水又は撹拌力等で開封する容器につめて、短繊維と一緒に充填すればよい。
In the package of the present invention, an admixture can also be added for the purpose of controlling the flowability of fresh concrete and fluctuations in the amount of air. In this case, commercially available admixtures such as high performance AE water reducing agents, high performance water reducing agents, fluidizing agents, air entraining agents, antifoaming agents, shrinkage reducing agents, swelling agents, polymer admixtures, etc. Mention may be made of chemical admixtures.
In addition, the admixture affected by the moisture of the short fiber is not affected by the moisture and may be filled together with the short fiber after being put in a container that is opened with water such as mortar or stirring power.
本発明のセメント混和材包装体において、外側に水解紙を配した水溶性フィルムからなる包装材料で形成された容器の形態としては、箱状、袋状等が一般的であるが、加工性、空袋の保管性、短繊維の充填のし易さ等の観点から、袋状とするのが好ましい。
外側に水解紙を配した水溶性フィルムが熱融着可能なポリビニルアルコール系樹脂であれば、外側からの熱圧着でフィルム同士、及びフィルムと水解紙の熱融着で容易に袋が作製でき、袋にセメント混和材を充填した後、熱圧着で封をすることができ、充填、シール作業が容易である。
なお、水解紙は、外袋状になっているのが好ましいが、必ずしも水溶性フィルムと一体となっている必要はなく、水溶性フィルムによる袋の外側に添設されているだけでもよい。
In the cement admixture package of the present invention, as a form of a container formed of a packaging material made of a water-soluble film having hydrolytic paper on the outside, a box shape, a bag shape and the like are common, but processability, From the viewpoint of storage stability of empty bags, ease of filling with short fibers, etc., it is preferable to form a bag.
If the water-soluble film with water-dissolving paper on the outside is a polyvinyl alcohol-based resin that can be heat-sealed, the film can be easily produced by heat-bonding from outside and heat-sealing of the film and water-dissolving paper, After filling the bag with cement admixture, it can be sealed by thermocompression, and filling and sealing work is easy.
Although the water-disintegrating paper is preferably in the form of an outer bag, it is not always necessary to be integrated with the water-soluble film, and it may be merely attached to the outside of the bag made of the water-soluble film.
水溶性フィルムには、エンボス加工を施すことができる。エンボス加工とは、フィルムの表面に凹凸加工を施すことを意味し、当該凹凸の存在によって、セメント混和材としてモルタル又はコンクリートに投入時に、水解紙を剥離する必要がある場合に剥がしやすく、省力化を図ることができる。なお、水溶性フィルムの表面がフラットかエンボス加工を施したかで、セメント混和材としての短繊維を充填後、保管時の影響は少ないが、上述の如く、投入時の取扱いに差が発生する。また、エンボスの有無により、水溶性樹脂の影響としてポリビニルアルコール系樹脂の場合、モルタル／コンクリートスラリー内で溶けるタイプの範囲では差はない。
エンボスの形態としては、大きさ０．５ｍｍ角の凹凸を０．６２５ｍｍ程度の所定ピッチで施したもの（１０ｍｍ角内に１６×１６個）を挙げることができる。
さらに、以上の作用から推測されるように、水分が速やかに外部に放散され易くするため及び投入時の扱いも含め（後述）、水溶性フィルム及び水解紙にエンボス加工がなされているこれが望ましい。
The water-soluble film can be embossed. Embossing means that the surface of the film is processed to be uneven, and the presence of the unevenness makes it easy to peel off when it is necessary to peel the water-dissolving paper when it is put into mortar or concrete as a cement admixture, saving labor. Can be achieved. Depending on whether the surface of the water-soluble film is flat or embossed, there is little influence during storage after filling with short fibers as a cement admixture. However, as described above, there is a difference in handling during charging. Further, depending on the presence or absence of embossing, there is no difference in the range of the type that dissolves in the mortar / concrete slurry in the case of the polyvinyl alcohol resin as an influence of the water-soluble resin.
As a form of embossing, there can be mentioned ones having irregularities with a size of 0.5 mm square formed at a predetermined pitch of about 0.625 mm (16 × 16 pieces within a 10 mm square).
Furthermore, as is presumed from the above action, it is desirable that the water-soluble film and the water-degrading paper are embossed in order to quickly dissipate moisture to the outside quickly and including handling at the time of charging (described later).
本発明のセメント混和材包装体の製造方法は、含水状の短繊維を含むセメント混和材を、外側に水解紙を配した水溶性フィルムからなる包装材料で形成された容器中に充填し、要すれば容器開口部をシールして、集積保管して、短繊維が内包する水分を、取り扱いが可能な程度の含水率となるまで揮散せしめることを特徴とする。
本発明のセメント混和材包装体の製造方法では、短繊維が内包する含水率が１５％以上のものを対象とするのが好ましい。その理由は、短繊維の含水率が１５％未満では、水溶性フィルムのみからの包装体としても袋詰め及び取り扱いが可能であるが、含水率が１５％を超えると共に不可能となるからである。
本発明のセメント混和材包装体の製造方法では、外側に水解紙を配する（添える）ことによって、内包する含水率が６０％までの短繊維の袋詰めが可能となり、さらに、袋詰め後の取扱いは、短繊維が内包する含水率が２０％以下になれば可能となる。
In the method for producing a cement admixture package of the present invention, a cement admixture containing hydrous short fibers is filled into a container formed of a water-soluble film packaging material having hydrolytic paper disposed on the outside. In this case, the container opening is sealed, accumulated and stored, and the moisture contained in the short fibers is volatilized until the moisture content is such that it can be handled.
In the method for producing a cement admixture package according to the present invention, it is preferable that the moisture content contained in the short fibers is 15% or more. The reason is that when the moisture content of the short fiber is less than 15%, the packaging and handling can be performed even from a water-soluble film alone, but it becomes impossible when the moisture content exceeds 15%. .
In the method for producing a cement admixture package according to the present invention, by disposing (attaching) hydrolytic paper on the outside, it is possible to bag short fibers having a moisture content of up to 60%. Handling is possible when the moisture content contained in the short fibers is 20% or less.
短繊維には、前述のごとく、短繊維の製造工程、あるいは油剤処理工程等で水分が付着含水する。例えば延伸工程での延伸槽中での温水や、蒸気による含水、繊維の表面処理のための油剤槽浸漬やスプレー等によって含水する。そして、これらの製造工程における水分は、延伸工程では、延伸ローラー、油剤槽出口では絞りローラーで水分はある程度除去され、繊維束の単繊維間に保持された水分が、含水率となる場合や、繊維束をカッターにより短繊維カットするに際して、切断しやすくするため水をスプレーしながらカットする方式もあり、この水分が含水率となる場合もある。
繊維長５〜４０ｍｍに切断して短繊維化するためのカッターは、通常の繊維の製造に使用できるロータリー式カッター等を使用できる。
外側に水解紙を配した水溶性フィルムからなる包装材料で形成された容器（以下、「本発明の袋等」ということがある。）に、前記含水状の短繊維を充填するには、カッターから落下する短繊維をコンベヤーで受けて、秤量装置で所定重量を計量し、これを空の本発明の袋等に充填し、開口部を熱シールする等して、本発明のセメント混和材包装体とする。
As described above, moisture adheres to the short fibers in the short fiber manufacturing process or the oil agent processing process. For example, the water is contained by warm water in a drawing tank in the drawing process, hydration by steam, immersion in an oil agent tank for surface treatment of fibers, spraying, or the like. And the moisture in these manufacturing processes, in the stretching process, the moisture is removed to some extent by the drawing roller and the squeeze roller at the outlet of the oil tank, and the moisture retained between the single fibers of the fiber bundle becomes the moisture content, When cutting a short fiber with a cutter, there is a method of cutting the fiber bundle while spraying water in order to make it easy to cut, and this moisture may be a moisture content.
As the cutter for cutting the fiber length to 5 to 40 mm to shorten the fiber length, a rotary cutter that can be used for producing ordinary fibers can be used.
In order to fill the hydrated short fibers into a container (hereinafter sometimes referred to as “the bag of the present invention”) made of a packaging material made of a water-soluble film having a water-dissolving paper on the outside, a cutter is used. The cement admixture packaging of the present invention is obtained by receiving the short fibers falling from the conveyor with a conveyor, weighing a predetermined weight with a weighing device, filling it into an empty bag of the present invention, heat sealing the opening, etc. Let it be the body.
なお、袋等への短繊維の充填時に、必要に応じて、他のセメント用混和剤を同時に充填することができる。また、容器開口部のシールは、必ずしも充填直後にする必要はなく、含水分を開口部から揮散させた後にシールしてもよい。
短繊維が充填された包装体は、パレット等に並べて載置され、短繊維の水分が包装材料の表面を通して揮散され、取り扱いが可能な状態になるまで、なるべく静置状態で保管される。
保管には、換気装置、加温装置等を備えた専用室（倉庫）を用いれば、湿度上昇による他の物質や、室環境への影響を回避できるので好ましい。
保管期間は、保管室の湿度にもよるが、調湿することなく室温で保管する場合、含水率５０％のポリプロピレン系短繊維で、概ね２〜５日間である。
上記水溶性フィルムと水解紙からなる袋に、含水短繊維を含む混和材を計量、充填し、保管するに際しては、上記作用から考え適切な方法をとることが望ましい。フィルム、紙を通して外部に速やかに水分を放出させる事が重要であり、外気の湿度は低く、水分を吸収・放出し易いように、ダンボールシートや新聞紙の上に置くのが望ましい。
混和材を袋詰したあと、不純物の混入を避けるため、あるいは取扱い易さや、投入時に混和材が飛び散らないように袋を閉じることが好ましい。フィルム全面から水分が放出されるため、封をしてもしなくても水分の放出速度に差はない。
In addition, when the short fiber is filled in the bag or the like, other cement admixtures can be filled at the same time if necessary. Further, the container opening is not necessarily sealed immediately after filling, and may be sealed after the moisture content is volatilized from the opening.
The packaging body filled with the short fibers is placed side by side on a pallet or the like, and stored in a stationary state as much as possible until the moisture of the short fibers is stripped through the surface of the packaging material and becomes ready for handling.
For storage, it is preferable to use a dedicated room (warehouse) equipped with a ventilation device, a heating device, and the like, because other substances due to an increase in humidity and the influence on the room environment can be avoided.
Although it depends on the humidity of the storage room, the storage period is approximately 2 to 5 days for polypropylene short fibers having a moisture content of 50% when stored at room temperature without conditioning.
When weighing, filling, and storing an admixture containing water-containing short fibers in a bag made of the water-soluble film and hydrolyzed paper, it is desirable to take an appropriate method in view of the above-mentioned action. It is important to quickly release moisture to the outside through film and paper, and it is desirable to place it on a corrugated cardboard sheet or newspaper so that the humidity of the outside air is low and moisture is easily absorbed and released.
After bagging the admixture, it is preferable to close the bag so as to avoid mixing of impurities, ease of handling, and so that the admixture does not scatter when thrown. Since moisture is released from the entire surface of the film, there is no difference in the rate of moisture release whether or not it is sealed.
本発明のセメント混和材の添加方法は、本発明のセメント混和材包装体から充填物を取り出すことなく、当該セメント混和材料包装体をモルタル又はコンクリートスラリー内に直接投入することを特徴とする。本発明のセメント混和材包装体の包装材料は、水溶性なので、モルタル又はコンクリートスラリーで溶解し、内部に充填された短繊維が、混和材としての機能が発現できるようにスラリー中に分散される。
本発明の混和材入りの本発明の包装体をモルタルやコンクリートスラリーに投入する際には、包装体として投入作業ができる程度までに、短繊維の含水率が低下していることが望ましい。
特に、３０％を超える高含水率短繊維を袋詰めした時は、含水率が２０％以下になるまで乱暴に取り扱わないことが望ましく、従って、モルタルやコンクリートスラリーへの投入は短繊維の含水率が２０％以下の段階で投入することが望ましい。
モルタルやコンクリートスラリーに投入して練り混ぜる際に、水溶性フィルムは溶解消滅するが、水解紙のパルプはモルタルやコンクリート混合物内に残る。その繊維状物（パルプ）がモルタル／コンクリートの硬化後、ひび割れ防止に効果があるとの提案もあるが、水解紙のパルプ繊維が、成型体や構造物に悪影響を及ぼす場合には、外側の水解紙を剥がして投入すれば良い。
なお、混和材としての繊維の使用量は、モルタル又はコンクリートスラリーに対して、爆裂防止用で１ｋｇ／ｍ3、ひび割れ防止用で２００〜３００ｇ／ｍ3程度であるから、
混和材包装体として１００〜６００ｇ／個であれば、添加投入作業の単位として適している。
The method for adding a cement admixture according to the present invention is characterized in that the cement admixture package is directly put into a mortar or concrete slurry without removing the filler from the cement admixture package according to the present invention. Since the packaging material of the cement admixture packaging body of the present invention is water-soluble, it is dissolved in a mortar or concrete slurry, and the short fibers filled therein are dispersed in the slurry so that the function as an admixture can be expressed. .
When the packaging body of the present invention containing the admixture of the present invention is introduced into mortar or concrete slurry, it is desirable that the moisture content of the short fibers is reduced to the extent that the packaging work can be performed.
In particular, when high moisture content short fibers exceeding 30% are packaged, it is desirable not to handle them roughly until the moisture content becomes 20% or less. Is preferably introduced at a stage of 20% or less.
When the mortar or concrete slurry is mixed and mixed, the water-soluble film dissolves and disappears, but the hydrolyzed pulp remains in the mortar and concrete mixture. There is also a suggestion that the fibrous material (pulp) is effective in preventing cracking after the mortar / concrete is cured, but if the pulp fiber of hydrolyzed paper adversely affects the molded body or structure, It is only necessary to remove the water-dissolving paper and put it in.
In addition, since the usage-amount of the fiber as an admixture is about 1 kg / m < 3 > for explosion prevention with respect to mortar or concrete slurry, and about 200-300 g / m < 3 > for crack prevention,
If it is 100-600g / piece as an admixture packaging body, it is suitable as a unit of addition addition operation.
以下、本発明を実施例及び比較例により説明するが、本発明はこれらの実施例になんら限定されるものではない。 EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention, this invention is not limited to these Examples at all.
補強用繊維混和材として、短繊維を収納するための容器として、正味１４０〜２００ｇを収納可能な幅１８ｃｍ×高さ（深さ）１３ｃｍの袋、及び正味４００ｇ収納する可能な幅２０ｃｍ×高さ（深さ）１８ｃｍの袋を、水溶性フィルムとしてポリビニルアルコールフィルムのタイプ、厚み、エンボスの有無、水解紙の坪量（目付け）等の異なるものを組み合わせて作製した。具体的には、短繊維、包装材料、袋として、以下のものを準備し、実施例及び比較例を行った。なお、袋は、幅×高さ（深さ）の２倍の大きさの長方形の包装材料を準備し、これを高さ方向に２つ折りして、両側部をヒートシールすることにより形成した。外周に水解紙を配する場合も、水溶性フィルムと水解紙を重ね合わせ、同様にヒートシールして袋を形成した。
１）短繊維
i）ポリプロピレン繊維（宇部日東化成（株）製、繊度；１７ｄｔｅｘ、繊維長；１０ｍｍ、活性剤付着量０．４％、繊維物性；破断強度 ４．０ｃＮ／ｄｔｅｘ、破断伸度 １５０％）、含水率１０〜４５％、ii）ポリプロピレン繊維（宇部日東化成（株）製、、繊度；２．２ｄｔｅｘ、繊維長；５ｍｍ、活性剤付着量０．５％、繊維物性；破断強度５．５ｃＮ／ｄｔｅｘ、破断伸度５０％）、含水率３０〜９０％、iii）ナイロン６繊維（アストン（株）製、商品名アストロン）、繊度；１０ｄｔｅｘ、繊維長；１０ｍｍ
２）包装材料
水溶性フィルム：ポリビニルアルコールフィルム；ｉ）日本合成化学工業（株）製、商品名ハイセロン、厚み（μｍ）；２５及び４０（エンボス付き）、５０（フラットタイプ）、水溶性のタイプ：Ａタイプ；冷水（５℃）可溶性、Ｂタイプ；温水（２５℃）可溶性
ii）（株）クラレ製、商品名クラリア、厚み３５μｍ、フラットタイプ、水溶性のタイプ：Ａタイプ
３）水解紙
イ；トイレットペーパー（坪量１９ｇ／ｍ2、厚み０．０８０ｍｍ）、ロ；水解紙（坪量３２ｇ／ｍ2、厚み０．０６８ｍｍ）
４）袋の大きさ
ニ；内容量約１５０ｇ、幅１８ｃｍ×高さ（深さ）１３ｃｍ、ホ：内容量約３００ｇ、幅２０ｃｍ×高さ（深さ）１８ｃｍ
As a reinforcing fiber admixture, as a container for storing short fibers, a bag with a width of 18 cm × height (depth) of 13 cm capable of storing 140 to 200 g of net, and a width of 20 cm × height capable of storing 400 g of net. (Depth) 18 cm bags were produced by combining polyvinyl alcohol film types, thicknesses, embossed presence / absence, basis weight (basis weight) of water-degrading paper, etc. as water-soluble films. Specifically, the following were prepared as short fibers, packaging materials, and bags, and Examples and Comparative Examples were performed. The bag was formed by preparing a rectangular packaging material having a size twice the width × height (depth), folding it in the height direction, and heat-sealing both sides. In the case of disposing hydrolytic paper on the outer periphery, a water-soluble film and hydrolytic paper were superposed and heat sealed in the same manner to form a bag.
1) Short fiber
i) Polypropylene fiber (manufactured by Ube Nitto Kasei Co., Ltd., fineness: 17 dtex, fiber length: 10 mm, active agent adhesion amount 0.4%, fiber physical properties: breaking strength 4.0 cN / dtex, breaking elongation 150%), water content Rate: 10 to 45%, ii) Polypropylene fiber (manufactured by Ube Nitto Kasei Co., Ltd., fineness: 2.2 dtex, fiber length: 5 mm, active agent adhesion amount 0.5%, fiber physical properties: breaking strength 5.5 cN / dtex , Elongation at break 50%), water content 30-90%, iii) nylon 6 fiber (product name Astron, manufactured by Aston Co., Ltd.), fineness: 10 dtex, fiber length: 10 mm
2) Packaging material Water-soluble film: Polyvinyl alcohol film; i) Nippon Synthetic Chemical Industry Co., Ltd., trade name Hi-Selon, thickness (μm); 25 and 40 (with embossed), 50 (flat type), water-soluble type : A type; soluble in cold water (5 ° C), B type; soluble in hot water (25 ° C)
ii) Kuraray Co., Ltd., trade name: Claria, thickness 35 μm, flat type, water-soluble type: A type 3) water disintegrating paper a; toilet paper (basis weight 19 g / m 2 , thickness 0.080 mm), b; Paper (basis weight 32g / m 2 , thickness 0.068mm)
4) Size of the bag D: Internal capacity about 150 g, width 18 cm × height (depth) 13 cm, E: internal capacity about 300 g, width 20 cm × height (depth) 18 cm
実施例１〜４、比較例１〜７
湿式延伸法で製造され短繊維化された含水率２５％の前記ポリプロピレン繊維３７５ｇ（正味短繊維質量：３００ｇ）を表１に示す水溶性フィルムと水解紙との組み合わせにより作製した袋に充填し、開口部をシールした包装体を作製し、これを３日保管して、包装体の外観、性状を観察した。結果を表１に示す。
Examples 1-4, Comparative Examples 1-7
Filled into a bag made by a combination of the water-soluble film and hydrolytic paper shown in Table 1 with 375 g of the polypropylene fiber having a moisture content of 25% (net short fiber mass: 300 g) manufactured by the wet drawing method and shortened, A package with the opening sealed was prepared, stored for 3 days, and the appearance and properties of the package were observed. The results are shown in Table 1.
表１に結果を示すように、実施例１〜４の包装体は３日経過後も水溶性フィルムや、外周の水解紙の破損はなく、安定して保管できる。一方、水溶性フィルムのみとした比較例１〜５は、フィルム厚みや、エンボスの有無にかかわらず、いずれもフィルムが破損し、安定保管ができなかった。また、水解紙のみにより袋を形成した比較例６では水解紙が、袋の内側を水解紙、外側を水溶性フィルムとした比較例７では、内側の水解紙を含めて破損し安定保管ができなかった。なお、比較例５は、水溶性フィルムの可溶性がＢタイプ（温水可溶タイプ）、でエンボスを施しているが、安定保管をすることはできなかった。 As shown in Table 1, the packaging bodies of Examples 1 to 4 can be stably stored without damage to the water-soluble film or the outer peripheral water-disintegrating paper even after 3 days. On the other hand, in Comparative Examples 1 to 5 using only a water-soluble film, the film was damaged and could not be stably stored regardless of the film thickness and the presence or absence of embossing. In Comparative Example 6 in which a bag was formed only with water-dissolving paper, the water-disintegrating paper was broken, and in Comparative Example 7 in which the inside of the bag was water-dissolving paper and the outside was a water-soluble film, the inner water-dissolving paper was broken and stable storage was possible. There wasn't. In Comparative Example 5, although the solubility of the water-soluble film was B type (warm water soluble type) and embossed, it could not be stably stored.
比較例８〜１０、及び１１〜１３
繊度１７ｄｔｅｘ、繊維長１０ｍｍの上記実施例と同一のポリプロピレン短繊維の正味１５０ｇの包装体とする場合、含水率と包装材料との関係を確認した。先ず、含水率１０％の短繊維と水溶性フィルム単独（比較例８、１０）、又は水解紙単独の場合（比較例９）の、保管性について、表２に結果を示す。また、含水率を１５％の短繊維と水溶性フィルム単独（比較例１１、１３）、又は水解紙単独の場合（比較例１２）の、保管性について表３に結果を示す。
Comparative Examples 8-10 and 11-13
In the case of a package of net 150 g of the same polypropylene short fiber as in the above example having a fineness of 17 dtex and a fiber length of 10 mm, the relationship between the moisture content and the packaging material was confirmed. First, the results are shown in Table 2 for storability of short fibers having a water content of 10% and a water-soluble film alone (Comparative Examples 8 and 10) or hydrolytic paper alone (Comparative Example 9). In addition, Table 3 shows the results of storage stability in the case of a short fiber having a water content of 15% and a water-soluble film alone (Comparative Examples 11 and 13) or hydrolytic paper alone (Comparative Example 12).
表２の示すように、含水率１０％のポリプロピレン短繊維では、水溶性フィルムのみあるいは水解紙のみでも安定保管が可能であった。
また、含水率１５％になると、表３に示すように、２５μｍの水溶性フィルムにエンボスを施した場合のみ、水溶性フィルムのみでも安定保管が可能であった。エンボスが短繊維と水溶性フィルムの密着を阻害し、水分の拡散を容易にすると共に、フィルム表面積増大で空気中への蒸発を速めたことによると思われる。
As shown in Table 2, the polypropylene short fibers having a water content of 10% could be stably stored only with a water-soluble film or only with water-degrading paper.
Further, when the water content was 15%, as shown in Table 3, stable storage was possible only with the water-soluble film only when embossed on the 25 μm water-soluble film. This is probably because the embossing hinders the adhesion between the short fibers and the water-soluble film, facilitates the diffusion of moisture, and accelerates the evaporation to the air by increasing the film surface area.
実施例５〜７、及び８〜１０
実施例１〜４と同じ短繊維を使用し、実施例５〜７においては含水率３５％、実施例８〜１０においては含水率４５％の場合の包装材料の構成と保管性について検討した。
結果を表４及び表５に示す。さらに、実施例８〜１０については、袋上部を熱シールした場合及び開放した場合の経過日数による質量変化を測定した。結果を表６に示す。
Examples 5-7 and 8-10
The same short fibers as those in Examples 1 to 4 were used, and the composition and storage properties of the packaging material in the cases where the moisture content was 35% in Examples 5 to 7 and the moisture content was 45% in Examples 8 to 10 were examined.
The results are shown in Tables 4 and 5. Furthermore, about Examples 8-10, the mass change by the elapsed days when the bag upper part was heat-sealed and opened was measured. The results are shown in Table 6.
表４に結果を示すように、水溶性フィルムの表面にエンボスを有する実施例５では、水解紙との癒着はないが、水溶性フィルムにエンボスを施さないフラット状態の実施例６及び７では、水解紙と水溶性フィルムとが癒着し、完全には引き剥がすことができなかった。 As shown in Table 4, in Example 5 having an emboss on the surface of the water-soluble film, there is no adhesion with hydrolyzed paper, but in Examples 6 and 7 in a flat state where the water-soluble film is not embossed, The water-disintegrating paper and the water-soluble film adhered to each other and could not be completely removed.
表５に結果を示すように、含水率４５％のポリプロピレン短繊維を内層に水溶性フィルム、外層に水解紙を配した袋に２３２ｇ（正味重量：１６０ｇ）充填し、袋開口部を熱シールした実施例８、及び開口部を開放状態で保管した実施例９、１０とも安定保管が可能であった。 As shown in Table 5, 232 g (net weight: 160 g) of a bag having a water content film of 45% in water content and a water-disintegrating paper in the outer layer was filled into the inner layer, and the bag opening was heat-sealed. In Example 8 and Examples 9 and 10 in which the opening was stored in an open state, stable storage was possible.
また、表６に示すように経過日数ごとの質量変化を見たが、実施例８と９の比較から、袋上部を熱シールした場合と、開放した場合の水分の減量には差がないことが判明した。
すなわち、水溶性フィルム及び水解紙層を通して水分が揮散していることがわかる。さらに、実施例９と実施例１０との比較から、坪量が低い水解紙では、紙が水溶性フィルムと癒着し易いことが判った。
Moreover, although the mass change for every elapsed days was seen as shown in Table 6, from the comparison of Example 8 and 9, there is no difference in the water | moisture-content loss when the bag upper part is heat-sealed, and when open | released. There was found.
That is, it can be seen that moisture is volatilized through the water-soluble film and the hydrolytic paper layer. Further, from comparison between Example 9 and Example 10, it was found that in the case of water-disintegrating paper having a low basis weight, the paper easily adheres to the water-soluble film.
実施例１１、１２
実施例８に使用した包装材料を使用し、正味短繊維重量１６０ｇタイプの袋を準備し、２．２ｄｔｅｘ、繊維長５ｍｍ、界面活性剤処理済のポリプロピレン短繊維（宇部日東化成（株）製）を含水率３０％として充填した実施例１１、及び１０ｄｔｅｘで繊維長１０ｍｍのナイロン６繊維（アストン（株）製）を含水率３０％として充填した実施例１２について、共に袋上部開放状態での保管性を検討した。いずれも、安定保管状態であった。
Examples 11 and 12
Using the packaging material used in Example 8, a bag having a net short fiber weight of 160 g was prepared, and 2.2 dtex, 5 mm fiber length, surfactant-treated polypropylene short fiber (manufactured by Ube Nitto Kasei Co., Ltd.) Example 11 filled with a water content of 30% and Example 12 filled with nylon 6 fibers (made by Aston Co., Ltd.) with 10 dtex and a fiber length of 10 mm with a water content of 30% were both stored in an open bag top state. The sex was examined. All were in a stable storage state.
実施例１３、１４、及び比較例１４
本発明のセメント混和材包装体において、混和材がポリプロピレン短繊維の場合における含水率の上限を見極めるため、実施例８に使用した包装材料を使用し、正味短繊維重量１６０ｇタイプの袋を準備し、１７ｄｔｅｘ、繊維長１０ｍｍで含水率６０％の実施例１３及び２．２ｄｔｅｘで、繊維長５ｍｍで含水率６０％の実施例１４、及び２．２ｄｔｅｘで、繊維長５ｍｍで含水率９０％の比較例１４により安定保管の可否を検討した。
含水率６０％のポリプロピレン短繊維において、実施例１３、１４共に安定保管がされていた。しかし、水溶性フィルムと水解紙とは癒着し、完全には分離できなかった。
一方、含水率９０％の比較例１４では、水が遊離し、その水分により、水溶性フィルム及び水解紙が破損し、短繊維が一部露出していた。
Examples 13 and 14 and Comparative Example 14
In the cement admixture package of the present invention, in order to determine the upper limit of the moisture content when the admixture is polypropylene short fibers, the packaging material used in Example 8 was used, and a bag with a net short fiber weight of 160 g was prepared. 17 dtex, Example 13 with fiber length 10 mm and moisture content 60% and 2.2 dtex, Example 14 with fiber length 5 mm and moisture content 60%, and 2.2 dtex, fiber length 5 mm and moisture content 90% The possibility of stable storage was examined according to Example 14.
In polypropylene short fibers having a water content of 60%, both Examples 13 and 14 were stably stored. However, the water-soluble film and the water-disintegrating paper adhered to each other and could not be completely separated.
On the other hand, in Comparative Example 14 having a moisture content of 90%, water was liberated, and the water-soluble film and hydrolyzed paper were damaged by the moisture, and some short fibers were exposed.
本発明のセメント混和材包装体及びセメント混和材の添加方法は、外側に水解紙を配した水溶性フィルムからなる包装材料で形成された容器中に、短繊維を含むセメント混和材を充填しているので、モルタル又はコンクリートの調合時にこのセメント混和材包装体を直接投入すれば、水解紙はセメントの混和水によって解離分散し、水溶性フィルムは溶解し、内部に充填された短繊維を含むセメント混和材がモルタル又はコンクリート中に拡散混合されて、その性能を発現できる状態とすることができる。従って、従来のごとく、現場で混和材としての繊維を正確に計量して、投入する作業を要せず、モルタル又はコンクリートの混練作業の省力化、作業環境の改善を図ることができるセメント混和材の添加方法として有効に利用できる。
本発明のセメント混和材包装体の製造方法は、外側に水解紙を配した水溶性フィルムからなる包装材料で形成された容器中に、含水率１５％以上の短繊維を含むセメント混和材を直接充填できるので、量産に適した湿式延伸法による含水状の短繊維であっても、延伸、短繊維カット後に乾燥工程や計量・梱包工程を経る必要がないので、短繊維や、帯電した繊維であることによる取り扱い難さを回避して、製造工程の省力化と、エネルギーコストの低減を図ることができるセメント混和材包装体の製造方法として有効に利用できる。
The cement admixture package of the present invention and the method of adding a cement admixture include filling a cement admixture containing short fibers into a container formed of a packaging material made of a water-soluble film with hydrolytic paper on the outside. Therefore, if this cement admixture package is directly added at the time of mixing mortar or concrete, the hydrolytic paper will dissociate and disperse with the mixed water of the cement, the water-soluble film will dissolve, and the cement containing short fibers filled inside The admixture can be diffused and mixed in the mortar or concrete so that the performance can be expressed. Therefore, as in the past, a cement admixture that does not require the work of accurately measuring and feeding fibers as an admixture in the field, can save labor in kneading mortar or concrete, and can improve the working environment. It can be effectively used as a method for adding the above.
In the method for producing a cement admixture package according to the present invention, a cement admixture containing short fibers having a water content of 15% or more is directly placed in a container formed of a water-soluble film with water-disintegrating paper on the outside. Since it can be filled, even wet hydrated short fibers suitable for mass production do not need to go through a drying process, weighing and packing process after drawing and cutting the short fibers. The present invention can be effectively used as a method for producing a cement admixture package that can avoid the difficulty of handling due to being present, save labor in the production process, and reduce energy costs.
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