JP2018158506A - Method of kneading granular powder and liquid - Google Patents
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Abstract
Description
本発明は、粉粒体と液体を均質に混練する方法に関する。 The present invention relates to a method for homogeneously kneading a granular material and a liquid.
セメントや骨材などの粉粒体と水の混練は、一般に、ホバートミキサやパン形強制練りミキサ等の攪拌羽根を備えたミキサを用いて行なう。しかし、これらの混練方法は、混練の初期に粉塵が飛散すること、また混練後にミキサの洗浄に手間がかかることなどが、欠点として挙げられる。 The kneading of powders such as cement and aggregate and water is generally performed using a mixer equipped with stirring blades such as a Hobart mixer or a pan-type forced kneading mixer. However, these kneading methods have disadvantages in that dust is scattered at the initial stage of kneading, and that it takes time to clean the mixer after kneading.
これらの欠点を解消しうる手段として、特許文献１には粉粒体（乾燥物）の混合方法が提案されている。具体的には、該方法は、混合袋の中に、成分が異なる複数の種類の乾燥した粉粒体を入れ、気体を圧入して気体領域を形成した後、袋口を密封した該混合袋を混合容器内に入れて、反転や回転により該混合袋を揺動して、粉粒体を混合する方法である。
混合は粉粒体をかき混ぜて均質化する操作であり、混合機内の粒子群の大きな移動の繰返しによる混合（移動混合）、粉粒体内の速度分布の差によって生じる粒子相互のすべりなどによる混合（せん断混合）、および近接した粒子相互の位置交換による局所的・拡散的な混合（拡散混合）などが相互に作用して、混合が行われる。一方、混練は粉粒体と液体を練る操作であり、混練に伴い混練物に凝集力や可塑性が生じる。
混合と混練に、このような相違があるため、特許文献１に記載の液体を含まない粉粒体（乾燥物）の混合方法を、粉粒体と液体の混練に応用しても、均質な混練物が得られるか否かは不明である。
As means for eliminating these drawbacks, Patent Document 1 proposes a method of mixing powder particles (dry matter). Specifically, in the method, a plurality of kinds of dry powders having different components are placed in a mixing bag, a gas region is formed by press-fitting gas, and then the bag mouth is sealed. Is mixed in the mixing container, and the mixing bag is swung by reversal or rotation to mix the granular material.
Mixing is an operation that stirs and homogenizes powder particles. Mixing by repeated large movements of particles in the mixer (moving mixing), mixing by particles sliding due to differences in velocity distribution in the particles ( (Shear mixing) and local / diffusive mixing (diffusion mixing) by exchanging positions between adjacent particles interact to perform mixing. On the other hand, kneading is an operation of kneading the powder and liquid, and cohesive force and plasticity are generated in the kneaded product with the kneading.
Since there is such a difference in mixing and kneading, even if the method of mixing powder (dry matter) not containing liquid described in Patent Document 1 is applied to kneading of powder and liquid, it is homogeneous. It is unclear whether a kneaded product can be obtained.
そこで、本発明は、粉粒体と液体を均質に混練する方法を提供することを目的とする。 Then, an object of this invention is to provide the method of knead | mixing a granular material and a liquid homogeneously.
本発明者は、前記課題を解決するために鋭意検討した結果、粉粒体と液体を袋に入れて、非せん断混合方式の混合機で混練すれば、前記目的を達成できることを見い出し、本発明を完成させた。すなわち、本発明は、以下の構成を有する粉粒体と液体の混練方法である。 As a result of intensive studies to solve the above problems, the present inventor has found that the above object can be achieved by putting the powder and liquid into a bag and kneading with a non-shear mixing type mixer. Was completed. That is, the present invention is a method for kneading powder and liquid having the following configuration.
［１］粉粒体と液体を、袋に入れて袋の入口を密封した後、該袋全体を非せん断混合方式の混合機で混練する、粉粒体と液体の混練方法。
［２］前記非せん断混合方式の混合機が、揺動ミキサ、ドラム式ミキサ、またはパン型造粒機である、前記［１］に記載の粉粒体と液体の混練方法。
［３］前記非せん断混合方式の混合機が揺動ミキサである、前記［１］に記載の粉粒体と液体混合組成物の混練方法。
［４］粉粒体と液体を、１種以上の配合に従い、それぞれ別の袋に入れて混練する、前記［１］〜［３］のいずれかに記載の粉粒体と液体の混練方法。
［５］前記袋の厚さが０．０１〜１ｍｍである、前記［１］〜［４］のいずれかに記載の粉粒体と液体の混練方法。
［６］前記粉粒体がセメントを含み、前記液体が水である、前記［１］〜［５］のいずれかに記載の粉粒体と液体の混練方法。
［７］前記水およびセメントの質量比（水／セメント比）が０．３以下である、前記［６］に記載の粉粒体と液体の混練方法。
[1] A method for kneading powder and liquid, wherein the powder and liquid are put in a bag and the bag inlet is sealed, and then the whole bag is kneaded by a non-shear mixing type mixer.
[2] The powder and liquid kneading method according to [1], wherein the non-shear mixing type mixer is an oscillating mixer, a drum mixer, or a bread granulator.
[3] The method for kneading a powder and liquid mixture composition according to [1], wherein the non-shear mixing type mixer is an oscillating mixer.
[4] The powder and liquid kneading method according to any one of the above [1] to [3], wherein the powder and liquid are kneaded in different bags according to one or more blends.
[5] The powder and liquid kneading method according to any one of [1] to [4], wherein the bag has a thickness of 0.01 to 1 mm.
[6] The method for kneading a powder and liquid according to any one of [1] to [5], wherein the powder includes cement and the liquid is water.
[7] The powder and liquid kneading method according to the above [6], wherein a mass ratio of water and cement (water / cement ratio) is 0.3 or less.
本発明の粉粒体と液体の混練方法は、（i）粉粒体と液体を均質に混練でき、（ii）袋内の混練物は混合機内に付着しないから、混合機の洗浄は不要であり、（iii）複数の種類（配合）の粉粒体と液体を、それぞれ別の袋に入れて混練できるため、複数の配合の混練物を１回の混練で得ることができる。 In the method of kneading the powder and liquid of the present invention, (i) the powder and liquid can be homogeneously kneaded, and (ii) the kneaded material in the bag does not adhere to the mixer, so there is no need to wash the mixer. Yes, (iii) A plurality of types (formulations) of powders and liquids can be put in different bags and kneaded, so that a kneaded product with a plurality of blends can be obtained by one kneading.
本発明の粉粒体と液体の混練方法は、前記のとおり、粉粒体と液体を、袋に入れて袋の入口を密封した後、該袋全体を非せん断混合方式の混合機で混練する方法である。以下、本発明について、粉粒体、袋、非せん断混合方式の混合機、混練方法、およびその他に分けて、詳細に説明する。 As described above, the powder and liquid kneading method of the present invention is as follows. After the powder and liquid are put in a bag and the bag inlet is sealed, the whole bag is kneaded by a non-shear mixing type mixer. Is the method. Hereinafter, the present invention will be described in detail by dividing it into a granular material, a bag, a non-shear mixing type mixer, a kneading method, and others.
１．粉粒体
本発明で用いる粉粒体は、種類を問わず、小麦粉や、セメント用混和材料、骨材、および石膏等の無機粉末など、粉粒体であれば使用できる。本発明で用いる液体は、種類を問わず水など液体であれば使用できる。なかでも、粘性が高く、経時的に硬化するセメントと水を含む組成物の混練に有用であり、特に、硬化速度が速い速硬セメントと水を含む組成物に好適である。
該粉粒体の最大粒径は、好ましくは５ｍｍ以下である。粒径がこの範囲であれば、本発明の混練方法により、充分に均質な混練物を得ることができる。なお、粉粒体の最大粒径は、より好ましくは３ｍｍ以下、さらに好ましくは２ｍｍ以下である。また、粒径が０．６ｍｍ以上の粉粒体が５０質量％以上であれば、混練がより容易になる。
1. Powder and Granules The powder and granule used in the present invention can be used as long as they are powder or any inorganic powder such as wheat flour, cement admixture, aggregate, and gypsum. The liquid used in the present invention can be used as long as it is a liquid such as water regardless of the type. Especially, it is useful for the kneading | mixing of the composition containing cement and water which has high viscosity and hardens | cures with time, and is suitable for the composition containing especially fast-hardening cement and water with a quick hardening rate.
The maximum particle size of the granular material is preferably 5 mm or less. If the particle size is within this range, a sufficiently homogeneous kneaded product can be obtained by the kneading method of the present invention. In addition, the maximum particle size of the granular material is more preferably 3 mm or less, and further preferably 2 mm or less. Moreover, kneading | mixing will become easier if the particle size has a particle size of 0.6 mm or more if it is 50 mass% or more.
２．袋
本発明で用いる袋は、特に制限されないが、柔軟性があることから、ビニール袋、ゴム袋、絞り袋、三角パック、フレキシブル容器、またはフレキシブルコンテナバッグ（フレコンバッグ）等が挙げられる。また、袋の入口を閉じる方法は、ビニールテープ、チャック、ジップロック、クリップ、ゴム栓、ネジ栓、または熱融着等により、袋の開口部を結束する方法が挙げられる。
前記袋の厚さは、防破性、柔軟性、および靭性の観点から、好ましくは０．０１〜１ｍｍ、より好ましくは０．０３〜０．５ｍｍ、さらに好ましくは０．０４〜０．３ｍｍである。また、前記特許文献１に記載の発明とは異なり、本発明の操作は混練であって混合ではないから、袋の中に気体を圧入して気体領域を形成することは必須ではない。袋内に気体領域を形成すると、むしろ袋が破れ易くなる。
2. Bag Although the bag used by this invention is not restrict | limited in particular, Since it has a softness | flexibility, a plastic bag, a rubber bag, a throttle bag, a triangular pack, a flexible container, a flexible container bag (flexible bag), etc. are mentioned. Examples of the method for closing the bag entrance include a method of binding the opening of the bag by vinyl tape, chuck, ziplock, clip, rubber plug, screw plug, heat sealing, or the like.
The thickness of the bag is preferably 0.01 to 1 mm, more preferably 0.03 to 0.5 mm, and still more preferably 0.04 to 0.3 mm, from the viewpoints of breakage resistance, flexibility, and toughness. is there. Unlike the invention described in Patent Document 1, since the operation of the present invention is kneading and not mixing, it is not essential to form a gas region by injecting gas into the bag. If a gas region is formed in the bag, the bag is more likely to be broken.
３．非せん断混合方式の混合機
本発明で用いる非せん断混合方式の混合機は、せん断作用や、攪拌を発生させる翼（羽根、ブレード、およびパドル）の動作により混合する方式ではなく、混合容器の回転や変形により混練する方式の装置である。攪拌翼があると、袋が破れたり翼に絡まる場合がある。
非せん断混合方式の混合機として、揺動ミキサ、ドラム式回転機、またはパン型造粒機が挙げられる。前記揺動ミキサは、回転方向以外の方向にも力が加わり、回転軸自体が上下左右に振動したり、または混合容器自体が変形して、三次元対流が生じる混合機である。また、前記ドラム式回転機は、例えば、Ｖ型混合機、洗濯機、乾燥器、ボールを用いないボールミル、または羽根を外した傾胴ミキサ等である。ただし、ドラム式回転機に、袋が破れないような棒状物や突起物を取り付けてもよい。
前記回転軸自体が上下左右に振動する混合機は、例えば、ハイブリッドブレンダー（新光技研社製）、ロッキングミキサー（愛知電機社製）、およびＳＡＮＭＩＸ（三恵ハイプレシジョン社製）等があり、混合容器自体が変形する混合機は、オーエムミキサー スタンダードタイプ（チヨダマシナリー社製）等が挙げられる。
これらの中でも、揺動ミキサは、混合効率がより高く、水／セメント比が３０％以下のセメント組成物でも混練できるから好ましい。また、オーエムミキサー スタンダードタイプ（チヨダマシナリー社製）は、混合容器内に突起した棒状物が存在するが、袋が破れたり、絡まったりすることはなく、混合容器が変形するとともに棒状物も混練物に変形を加え混練効率が高いからより好ましい。
3. Non-shear mixing type mixer The non-shear mixing type mixer used in the present invention is not a method of mixing by the action of the blades (blades, blades, and paddles) that generate shearing action or stirring, but the rotation of the mixing container. It is an apparatus of a kneading method by deformation. If there is a stirring blade, the bag may be torn or entangled with the blade.
Examples of the non-shear mixing type mixer include an oscillating mixer, a drum type rotating machine, and a bread type granulator. The oscillating mixer is a mixer that generates a three-dimensional convection by applying a force in a direction other than the rotation direction and causing the rotation shaft itself to vibrate up and down, left and right, or deforming the mixing container itself. The drum-type rotating machine is, for example, a V-type mixer, a washing machine, a dryer, a ball mill that does not use balls, or a tilting drum mixer with blades removed. However, you may attach the rod-shaped thing and protrusion which a bag does not tear to a drum type rotary machine.
Examples of the mixer in which the rotating shaft itself vibrates vertically and horizontally include a hybrid blender (manufactured by Shinko Giken Co., Ltd.), a rocking mixer (manufactured by Aichi Electric Co., Ltd.), and SANMIX (manufactured by Sankei High Precision Co., Ltd.). Examples of the mixer that deforms include OM mixer standard type (manufactured by Chiyoda Machinery Co., Ltd.).
Among these, the oscillating mixer is preferable because the mixing efficiency is higher and even a cement composition having a water / cement ratio of 30% or less can be kneaded. In addition, OM Mixer Standard Type (made by Chiyoda Machinery Co., Ltd.) has a protruding rod-shaped object in the mixing container, but the bag is not torn or entangled, the mixing container is deformed and the rod-shaped object is also kneaded It is more preferable because the kneading efficiency is high by adding deformation.
４．混練方法
本発明の粉粒体と液体の混練方法は、粉粒体と液体を袋に入れて、この袋全体を前記非せん断混合方式の混合機で混練する。混練後の袋の中の混練物は、袋の一部に穴を開けることにより、手を汚すことなく保管容器等に容易に投入（注入）でき、終了後は袋ごとそのまま廃棄すれば、周囲を汚すこともなく混練作業を効率的に行える。また、非せん断混合方式の混合機を用いた混練は、せん断力がないか、または極めて小さいため、袋が破損することなく袋の中で粉粒体と液体を充分に混練できる。また、袋内の混練物は混合機内に付着しないから、混合機の洗浄は不要である。このように、本発明では、混合機を洗浄するための洗浄設備や、排液処理設備が不要なため、これらの設備がない実験室や作業場等でも混練できる。また、使用する場所の近傍で混練できるため、混練物の運搬時間は短縮できるから、可使時間として考慮しなくてもよい。
さらに、この袋を用いた混練方法は、複数の種類（配合）の粉粒体と液体を、それぞれ別の袋に入れて混練できるため、複数の配合の混練物を１回の混練操作で得ることができるという利点もある。また、必要な混練物が少量である状況において、大型混合機しかない場合でも、必要な量の混練対象物を入れた袋と、水やスラリーを入れたダミーの袋を混合機に投入して同時に混練すれば、効率よく混合できる。ダミーの袋を用いれば、大型混合機でも余分な混練物は生じないから、余剰分の混練物の廃棄を回避しつつ、効率よく混練できる。
4). Kneading method In the method of kneading the powder and liquid of the present invention, the powder and liquid are put in a bag, and the whole bag is kneaded by the non-shear mixing type mixer. The kneaded product in the bag after kneading can be easily put (injected) into a storage container etc. without making your hands dirty by making a hole in a part of the bag. The kneading operation can be performed efficiently without fouling. In addition, since kneading using a non-shear mixing type mixer has no or very little shearing force, the powder and liquid can be sufficiently kneaded in the bag without damaging the bag. Moreover, since the kneaded material in the bag does not adhere to the mixer, it is not necessary to wash the mixer. Thus, in this invention, since the washing | cleaning equipment for wash | cleaning a mixer, or a drainage processing equipment is unnecessary, it can knead | mix in a laboratory, a work place, etc. without these equipment. Moreover, since kneading can be performed in the vicinity of the place to be used, the transport time of the kneaded product can be shortened, so that it is not necessary to consider it as the pot life.
Furthermore, in this kneading method using a bag, a plurality of types (compounds) of powder and liquid can be put in different bags and kneaded, so that a kneaded product of a plurality of blends can be obtained by a single kneading operation. There is also an advantage of being able to. In addition, even when only a large mixer is available in a situation where a small amount of kneaded material is required, a bag containing a necessary amount of the material to be kneaded and a dummy bag containing water or slurry are put into the mixer. If they are kneaded at the same time, they can be mixed efficiently. If a dummy bag is used, an excess kneaded material is not generated even in a large-sized mixer, so that it is possible to efficiently knead while avoiding discarding the excess kneaded material.
５．その他
本発明により混練した混練物は袋の中に入った状態であるから、そのまま保管や貯蔵ができる。また、袋の先端（角部分）を破って中身の混練物を容器内に押し出せば、入口の狭い容器内にも容易かつ迅速に注入できるから、セメントと水の混練物をジャンカやひび割れなどに注入する補修作業や、押出しによる付加製造装置への材料供給に適する。
付加製造装置に用いる超速硬セメント組成物の配合が不適切な場合、混合機内で混練物が固化することがあり、固化物の除去や残存した混練物の掃除に多大な労力を要するが、本発明では、この場合でも袋ごと廃棄するだけで済み、また、周囲を汚すこともないから、生産効率が高いと云える。
また、本発明を用いて固化材と有害物質を含む汚染土壌を混練する場合、混練物は常に袋の中に入っているため、有害物質の飛散および発塵、有害物質との接触を防止できる。
また、本発明において柔軟性が高く透明な袋を用いれば、混練物の流動性状を袋に入れたまま観察できるから、混練物の流動性を経時的に評価でき、かつ混練物は失われない。また、評価時における掃除や洗浄は、不要かまたは大幅に軽減できる。
5. Others Since the kneaded material kneaded according to the present invention is in a state of being contained in a bag, it can be stored and stored as it is. In addition, if the kneaded material inside the bag is pushed into the container by breaking the tip (corner part) of the bag, it can be easily and quickly injected into a container with a narrow inlet. It is suitable for repair work to be injected into the material and supply of materials to additional manufacturing equipment by extrusion.
If the composition of the super-hard cement composition used in the additional production equipment is inappropriate, the kneaded product may solidify in the mixer, and a great deal of labor is required to remove the solidified product and to clean the remaining kneaded product. According to the invention, even in this case, it is only necessary to discard the entire bag, and the surroundings are not soiled, so it can be said that the production efficiency is high.
In addition, when kneading contaminated soil containing solidified material and harmful substances using the present invention, the kneaded material is always in the bag, so that scattering and generation of harmful substances and contact with harmful substances can be prevented. .
In addition, if a flexible and transparent bag is used in the present invention, the fluidity of the kneaded product can be observed while being put in the bag, so that the fluidity of the kneaded product can be evaluated over time, and the kneaded product is not lost. . Moreover, cleaning and washing at the time of evaluation are unnecessary or can be greatly reduced.
以下、実施例により本発明を説明するが、本発明はこの実施例に限定されない。
１．粉粒体と液体の混練（その１）
（１）実施例１
縦６５０ｍｍ、横３５０ｍｍ、厚さ０．１ｍｍのポリエチレン製の袋に、セメント４５０ｇ、標準砂１３５０ｇ、および水２２５ｇを入れた後、袋の入口を結束帯で結束し、直径５０ｃｍ、長さ５０ｃｍのボールミル（ただし、ボールを用いない。吉田製作所社製）に投入して、回転速度４３０ｒｐｍで回転して、２４０秒間混練し混練物ａを調製した。
（２）比較例１
セメント４５０ｇと水２２５ｇをホバートミキサの練り鉢に入れて、低速で３０秒間混練した後、標準砂１３５０ｇを３０秒間で投入し、高速に切り替え、引き続き３０秒間混練した。９０秒間混練を休止する間に、ミキサ内とパドルの混練物を、約１５秒かけて掻き落とした後、再び高速で６０秒間混練して、混練物ｂを調製した。
（３）混練物ａと混練物ｂの混練状態の評価
該評価は、ＪＩＳ Ｒ ５２０１「セメントの物理試験方法」の１２において規定するフロー試験に準拠して行った。具体的には、フローテーブル上のフローコーンの内部に、１層目の混練物を詰めた後、全面にわたって１５回突き、さらに２層目の混練物を詰めた後、全面にわたって１５回突き、最後に不足分を補って表面をならした。そして、直ちにフローコーンをゆっくりと上方に抜き去り、１５秒間に１５回の落下運動を与え、混練物の流動が停止した後に、混練物の最長径と、該最長径に対し直角方向の径を測定し、これらの平均値（フロー値）を混練状況の評価指標に用いて、混練物ａと混練物ｂの混練状態を評価した。
その結果、前記フロー値は、混練物ａで２０１ｍｍ、混練物ｂで２０３ｍｍであり、本発明の粉粒体と液体の混練方法は、通常行われる混練方法（比較例１）と同じ混練状態であった。また本発明の混練方法は、掻き落とし作業や混合機の洗浄作業が不要であった。
EXAMPLES Hereinafter, although an Example demonstrates this invention, this invention is not limited to this Example.
1. Kneading powder and liquid (Part 1)
(1) Example 1
After putting 450 g of cement, 1350 g of standard sand, and 225 g of water in a polyethylene bag having a length of 650 mm, a width of 350 mm, and a thickness of 0.1 mm, the entrance of the bag is bound with a cable tie, and the diameter is 50 cm and the length is 50 cm. The mixture was put into a ball mill (however, balls were not used; manufactured by Yoshida Seisakusho Co., Ltd.), rotated at a rotational speed of 430 rpm, and kneaded for 240 seconds to prepare a kneaded product a.
(2) Comparative Example 1
450 g of cement and 225 g of water were put in a kneading pot of a Hobart mixer and kneaded at a low speed for 30 seconds, then 1350 g of standard sand was added in 30 seconds, switched to a high speed, and then kneaded for 30 seconds. While the kneading was suspended for 90 seconds, the kneaded material in the mixer and the paddle was scraped off over about 15 seconds, and then kneaded again at a high speed for 60 seconds to prepare a kneaded material b.
(3) Evaluation of the kneaded state of the kneaded material a and the kneaded material b The evaluation was performed in accordance with a flow test specified in 12 of JIS R 5201 “Cement physical test method”. Specifically, after stuffing the first layer of the kneaded material inside the flow cone on the flow table, the surface was struck 15 times, and after the second layer of knitted material was stuffed, the surface was struck 15 times. Finally, I made up the surface by making up for the shortfall. Immediately after that, the flow cone is slowly withdrawn upwardly, and 15 times of falling motion is given for 15 seconds. After the flow of the kneaded material stops, the longest diameter of the kneaded material and the diameter perpendicular to the longest diameter are set. The kneaded state of the kneaded material a and the kneaded material b was evaluated using these average values (flow values) as evaluation indexes for the kneading status.
As a result, the flow value is 201 mm for the kneaded product a and 203 mm for the kneaded product b, and the powder and liquid kneading method of the present invention is in the same kneading state as the usual kneading method (Comparative Example 1). there were. Further, the kneading method of the present invention does not require scraping work or mixing machine cleaning work.
２．粉粒体と液体の混練（その２）
（４）実施例２
実施例１と同じポリエチレン製の袋に、セメント８６６ｇ、山砂１２０４ｇ、水２４７ｇ、および高性能減水剤１３ｇを入れた後、袋の入口を結束帯で結束し、揺動ミキサ（製品名：ＯＭミキサー スタンダードタイプ、チヨダマシナリー社製）を用いて、中速（目盛７）で２４０秒間混練して、混練物ｃを調製した。
（５）比較例２
セメント８６６ｇ、山砂１２０４ｇをホバートミキサの練り鉢に入れて、低速で３０秒間混練した後、水２４７ｇ、および高性能減水剤１３ｇを入れ、低速で３００秒間混練を続けた。そして、３００秒間混練を休止する間に、ミキサ内とパドルの混練物を掻き落とした後、再び低速で３０秒間混練して、混練物ｄを調製した。
（６）混練物ｃと混練物ｄの混練状態の評価
１５回の落下運動を与えない以外は前記「（３）混練物ａと混練物ｂの混練状態の評価」と同様にして、混練物ｃと混練物ｄの混練状態を評価した。その結果、フロー値は、混練物ｃで２７６ｍｍ、混練物ｄで２７７ｍｍであり、本発明の粉粒体と液体の混練方法は、通常行われる混練方法（比較例２）と同じ混練状態であった。
2. Kneading powder and liquid (Part 2)
(4) Example 2
After putting 866 g of cement, 1204 g of mountain sand, 247 g of water, and 13 g of high-performance water reducing agent in the same polyethylene bag as in Example 1, the inlet of the bag was bound with a binding band, and a rocking mixer (product name: OM) Using a mixer standard type, manufactured by Chiyoda Machinery Co., Ltd., kneaded for 240 seconds at medium speed (scale 7) to prepare kneaded product c.
(5) Comparative Example 2
866 g of cement and 1204 g of mountain sand were put in a kneading pot of a Hobart mixer and kneaded for 30 seconds at a low speed. Then, 247 g of water and 13 g of a high-performance water reducing agent were added, and kneading was continued for 300 seconds at a low speed. Then, while kneading was suspended for 300 seconds, the kneaded material in the mixer and the paddle was scraped off, and then kneaded again at a low speed for 30 seconds to prepare a kneaded material d.
(6) Evaluation of kneaded state of kneaded product c and kneaded product d Kneaded product in the same manner as in “(3) Evaluation of kneaded state of kneaded product a and kneaded product b”, except that 15 dropping motions are not given. The kneading state of c and kneaded material d was evaluated. As a result, the flow values were 276 mm for the kneaded product c and 277 mm for the kneaded product d, and the powder and liquid kneading method of the present invention was in the same kneading state as the usual kneading method (Comparative Example 2). It was.
（７）実施例３
実施例１と同じポリエチレン製の袋に、セメント８６６ｇ、山砂１２０４ｇ、水２４７ｇ、および高性能減水剤１３ｇを入れた後、袋の入口を結束帯で結束し、ボールを用いないボールミル（吉田製作所社製）を用いて、実施例１と同様の条件で混練した。その結果、混練物ｃと同様のフローを得るのに６００秒間要した。
したがって、非せん断混合方式の混合機のなかでも三次元対流により混合する混合機（揺動ミキサ）は混練効率が高いことがわかった。
（８）比較例３
実施例１と同じポリエチレン製の袋に、セメント４５０ｇ、標準砂１３５０ｇ、および水２２５ｇを入れた後、ホバートミキサを用いて比較例１と同じ条件で混練したが、袋がパドルに絡まり破れて、混練を続けることができなかった。
（９）比較例４
実施例１と同じポリエチレン製の袋に、セメント４５０ｇ、標準砂１３５０ｇ、および水２２５ｇを入れた後、袋の入口を結束帯で結束し、強制練りミキサ（製品名：ＴＭ−５５型ターボミキサ、大平洋機工社製）内に入れて混練したところ、袋が攪拌羽根に引っ掛かって破れ、混練を続けられなかった。
したがって、せん断混合方式の混合機は、本発明の粉粒体と液体の混練方法を適用できなかった。
(7) Example 3
After putting 866 g of cement, 1204 g of mountain sand, 247 g of water, and 13 g of high-performance water reducing agent in the same polyethylene bag as in Example 1, the bag entrance was tied with a tie, and a ball mill that does not use balls (Yoshida Seisakusho) Was used and kneaded under the same conditions as in Example 1. As a result, it took 600 seconds to obtain the same flow as that of the kneaded product c.
Therefore, it was found that a mixer (oscillating mixer) that mixes by three-dimensional convection among non-shear mixing type mixers has high kneading efficiency.
(8) Comparative Example 3
After putting 450 g of cement, 1350 g of standard sand, and 225 g of water in the same polyethylene bag as in Example 1, it was kneaded under the same conditions as in Comparative Example 1 using a Hobart mixer. Kneading could not be continued.
(9) Comparative Example 4
After putting 450 g of cement, 1350 g of standard sand, and 225 g of water in the same polyethylene bag as in Example 1, the bag inlet was bound with a tie, and a forced kneading mixer (product name: TM-55 type turbo mixer, Ohira) When the kneading was carried out in (made by Yoki Kogyo Co., Ltd.), the bag was caught by the stirring blade and torn, and kneading could not be continued.
Therefore, the shear mixing type mixer cannot apply the method of kneading the powder and liquid of the present invention.
Claims (7)
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|---|---|---|---|---|
| JPS4939609A (en) * | 1972-08-23 | 1974-04-13 | ||
| JPS5845918A (en) * | 1981-09-14 | 1983-03-17 | 満尾 浩治 | Kneading method |
| JPS6265724A (en) * | 1985-09-17 | 1987-03-25 | Chiyoda Tech & Ind Co Ltd | Method for kneading in bag |
| JP2005313043A (en) * | 2004-04-28 | 2005-11-10 | Tsukishima Kikai Co Ltd | Method for mixing granular substance |
| JP2006346952A (en) * | 2005-06-15 | 2006-12-28 | Shimizu Corp | Material kneading and pressure-feeding device |
| JP2014188915A (en) * | 2013-03-28 | 2014-10-06 | Tokai Rubber Ind Ltd | Agitation method and device for viscous material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4939609A (en) * | 1972-08-23 | 1974-04-13 | ||
| JPS5845918A (en) * | 1981-09-14 | 1983-03-17 | 満尾 浩治 | Kneading method |
| JPS6265724A (en) * | 1985-09-17 | 1987-03-25 | Chiyoda Tech & Ind Co Ltd | Method for kneading in bag |
| JP2005313043A (en) * | 2004-04-28 | 2005-11-10 | Tsukishima Kikai Co Ltd | Method for mixing granular substance |
| JP2006346952A (en) * | 2005-06-15 | 2006-12-28 | Shimizu Corp | Material kneading and pressure-feeding device |
| JP2014188915A (en) * | 2013-03-28 | 2014-10-06 | Tokai Rubber Ind Ltd | Agitation method and device for viscous material |
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