JP2009154957A - Premix mortar package - Google Patents

Premix mortar package Download PDF

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JP2009154957A
JP2009154957A JP2007338672A JP2007338672A JP2009154957A JP 2009154957 A JP2009154957 A JP 2009154957A JP 2007338672 A JP2007338672 A JP 2007338672A JP 2007338672 A JP2007338672 A JP 2007338672A JP 2009154957 A JP2009154957 A JP 2009154957A
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bag
mortar
thickness
package
premix mortar
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Yutaka Nakajima
裕 中島
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Taiheiyo Materials Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a premix mortar package without increasing the cost of packaging material that scarcely causes load collapse even the packages are transported in stacked conditions, for solving the problem that at least a premix mortar package having an outer surface made of a highly water-repellent material such as resin is low in sliding resistance on the outer surface in general, therefore the packages stacked can easily slide against each other and easily cause load collapse, in particular, a light-weight premix mortar package of a small capacity tends to have the load collapse remarkably. <P>SOLUTION: The premix mortar package is contained in a paper package of 100-1,000 μm thickness. The premix mortar package also has a thickness of 200 mm or less as a package. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、少なくともセメントと細骨材を含有するプレミックスモルタルを袋に収納した包袋物に関する。   The present invention relates to a sachet in which a premix mortar containing at least cement and fine aggregate is stored in a bag.

一般に、建築や土木工事で充填材、裏込材又はグラウト材などとして充填施工されるセメント系のモルタルは、施工現場等での計量の手間を省くため、予めセメント及び細骨材等を秤量の上乾式混合し、乾式混合物は概ね数kg〜数十kg毎に袋詰めされ、プレミックスモルタル包袋物として出荷されることが多い。出荷の際は、作業効率の観点から、包袋物を概ね5〜10段ほどの高さになるようパレット上に積載し、通常は積載した状態でパレットごと搬送される。パレット上の包袋物の積載高さによっては、搬送中に荷崩れを起こし易く、また倉庫保管も通常はパレットに積み上げられたまま保管されるので振動によっても荷崩れする虞があった。荷崩れを起こすと、落下により破袋の虞がある。従来より、セメント等の水和反応性粉粒物の収納袋として、外装をクラフト紙、内装をポリエチレン等の樹脂フィルムを使用した多層袋やポリエチレン等の樹脂でラミネートした紙製の袋が使用されてきた。また、これらに用いられる樹脂フィルムよりも数倍程度厚くしたポリエチレンフィルムもプレミックスの包装に適することが知られている。(例えば、特許文献1参照。)これらの収納用袋は何れも、水分の侵入を防ぐことを主たる目的に製作されている。このため透水し難い材質である樹脂が袋素材として使用されているが、異材質からなる多層袋は製造工程が繁雑となることに加え、特に、袋材に関わるコストが上昇する。
特開2003−160174号公報
In general, cement-based mortar that is filled and filled as a filler, backing material, or grout material in construction and civil engineering works is pre-weighed in order to save the measurement work at the construction site. In many cases, the dry-type mixture is packaged approximately every several kg to several tens of kg and shipped as a premixed mortar bag. At the time of shipment, from the viewpoint of work efficiency, the package is loaded on the pallet so that it is approximately 5 to 10 steps high, and is normally transported together with the pallet. Depending on the loading height of the sachets on the pallet, it is easy for the cargo to collapse during transportation, and since the warehouse is usually stored while being stacked on the pallet, the cargo may collapse due to vibration. If collapse occurs, there is a risk of bag breakage due to falling. Conventionally, as sachets for hydration-reactive powders such as cement, kraft paper for the exterior, multilayer bags using resin films such as polyethylene for the interior, and paper bags laminated with a resin such as polyethylene have been used. I came. It is also known that a polyethylene film that is several times thicker than the resin film used for these is also suitable for premix packaging. (For example, refer to Patent Document 1.) All of these storage bags are manufactured mainly for the purpose of preventing moisture from entering. For this reason, resin, which is a material that hardly permeates water, is used as a bag material. However, a multilayer bag made of different materials increases the cost of the bag material, in addition to the complicated manufacturing process.
JP 2003-160174 A

一方、少なくとも包装袋の外表面が樹脂のような撥水性の高い材質からなるものでは、一般に外表面の滑り抵抗が低くなるため、積み上げられた袋が互いに滑り易く、荷崩れを起こし易い。特に、容重の小さい軽量プレミックスモルタルでは、このような撥水性表面の袋に収納して積載すると、嵩の割には1袋あたりの重量が軽くなるので、重ね積みされた上部の袋の設置安定性が低下し、より荷崩れし易くなる。このため、積載段数を低く制限する等の必要があり、作業効率や搬送効率の低下に繋がった。   On the other hand, when at least the outer surface of the packaging bag is made of a highly water-repellent material such as a resin, the sliding resistance of the outer surface is generally low, so that the stacked bags are easy to slip on each other and easily collapse. In particular, a lightweight premix mortar with a small weight, when placed in a bag of such a water-repellent surface and loaded, the weight per bag is reduced for its bulk. Stability is reduced and the cargo is more likely to collapse. For this reason, it is necessary to limit the number of loading stages to a low level, which leads to a reduction in work efficiency and transport efficiency.

本発明者は、前記課題解決の為、検討を重ねた結果、特定の厚みの紙製袋を使用することによって、外表面の滑り抵抗の低下を防ぐとともに、袋材自体の圧縮性が高まり表面の変形追従性が高まり、凹凸状態を概ね維持したまま上下間の各袋の接触面積が増大するため、例え容重の小さい軽量プレミックスを収納した場合でも多段積載時の荷崩れを起こし難くなったプレミックスモルタル包袋物が得られたことから、本発明を完成させた。   As a result of repeated investigations for solving the above problems, the present inventor uses a paper bag having a specific thickness to prevent a decrease in slip resistance of the outer surface and increase the compressibility of the bag material itself. Since the deformation followability of the bag increases and the contact area of each bag between the upper and lower sides increases while maintaining the uneven state, it is difficult to cause load collapse during multi-stage loading even if a light premix with a small weight is stored. Since the pre-mixed mortar bag was obtained, the present invention was completed.

即ち、本発明は、次の(1)〜(4)で表される包袋物である。(1)厚さ100〜1000μmの紙製袋に収納されたものであることを特徴とするプレミックスモルタル包袋物。(2)引張強度が2kN/m以上である紙からなる袋であることを特徴とする前記(1)のプレミックスモルタル包袋物。(3)収納されるプレミックスモルタルの単位体積あたりの質量が、1000kg/m3以下であることを特徴とする前記(1)又は(2)のプレミックスモルタル包袋物。(4)プレミックスモルタル包袋物の厚みが200mm以下であることを特徴とする前記(1)〜(3)何れかのプレミックスモルタル包袋物。 That is, the present invention is a packaged product represented by the following (1) to (4). (1) A premixed mortar bag, which is stored in a paper bag having a thickness of 100 to 1000 μm. (2) The premixed mortar wrapping according to (1) above, which is a bag made of paper having a tensile strength of 2 kN / m or more. (3) The premix mortar wrapping according to (1) or (2) above, wherein the mass per unit volume of the premix mortar to be stored is 1000 kg / m 3 or less. (4) The premix mortar wrapping material according to any one of (1) to (3), wherein the premix mortar wrapping material has a thickness of 200 mm or less.

本発明によれば、かなり高い高さまで多段に重ね置きしても搬送時に荷崩れを起こし難いプレミックスモルタル包袋物が得られる。特に、容重の小さいプレミックスモルタルでも容重の小さいプレミックスモルタルの場合と遜色ない程度まで多段積載しても荷崩れを起こり難く、しかもコスト的にも比較的安価な包装用の袋の使用で行うことができる。   According to the present invention, it is possible to obtain a premixed mortar wrapping material that is less likely to collapse during transportation even when stacked in multiple stages to a considerably high height. In particular, even with low-volume premix mortar, it is difficult to cause collapse even when loading multiple stages to the same extent as with low-volume premix mortar, and it is done by using packaging bags that are relatively inexpensive. be able to.

本発明のプレミックスモルタル包袋物に使用する袋は紙製の袋を使用する。紙は、特に強度が低いものや透水性が高いもの以外であれば、使用に制限されるものではない。好ましくは、引張強度が方向によらず概ね2kN/m以上有することができる紙が良い。このような紙として、例えば、クラフト紙、耐油紙、撥水紙、クレープ紙等を挙げることができる。最も好ましくは、強度やコストの両面で有利なクラフト紙が良い。一方、ポリエチレン等の樹脂製の袋では積載時に袋表面の滑り抵抗が低く、積み上げたときの安定性に欠け易く、荷崩れを起こし易いので好ましくない。   The bag used for the premixed mortar bag of the present invention is a paper bag. The paper is not limited to use as long as it is not particularly low in strength or high in water permeability. Preferably, paper that has a tensile strength of approximately 2 kN / m or more regardless of the direction is preferable. Examples of such paper include craft paper, oil-resistant paper, water-repellent paper, and crepe paper. Most preferably, kraft paper advantageous in both strength and cost is preferred. On the other hand, a bag made of resin such as polyethylene is not preferable because it has low sliding resistance on the bag surface when loaded, tends to lack stability when stacked, and easily collapses.

また、本発明のプレミックスモルタル包袋物に使用する袋紙の厚みは100〜1000μmとする。厚みが100μm未満では、概して引張強度が低いため破袋し易く、また透水防止能力も不足する他、袋を積み上げた際の重さによる袋自体の圧縮量が小さく、荷崩れ防止作用が得られ難いので好ましくない。また、厚みが1000μmを超えると、荷重による紙自体の圧縮率が低下するため、細かい凹凸に応じた変形追従性が得難くなり、滑り抵抗が低下し易くなるので好ましくない。   Moreover, the thickness of the bag used for the premixed mortar bag of the present invention is 100 to 1000 μm. If the thickness is less than 100 μm, the tensile strength is generally low, so it is easy to break the bag and the ability to prevent water permeation is insufficient. It is not preferable because it is difficult. On the other hand, when the thickness exceeds 1000 μm, the compression ratio of the paper itself due to the load is lowered, so that it is difficult to obtain deformation followability according to fine irregularities, and slip resistance tends to be lowered, which is not preferable.

また、本発明のプレミックスモルタル包袋物に使用する袋の形状は特に限定されない。好ましくは、所定の袋厚み幅を備えた直方体状等の形状とする。また、袋の寸法もプレミックスモルタルを収納した包袋物としての厚み以外は特に制限されない。プレミックスモルタル包袋物の厚みは200mm以下にするのが好ましい。厚みの下限値は特に制限されない。厚みが200mmを超えると、多段に積み重ねて積載した際、積載物全体の重心が高くなり過ぎることがあり、設置安定性が確保し難くなるので適当でない。ここで、包袋物の厚みとはプレミックスモルタルを包袋物を重ね積みしようとする際の積載高さ方向の包袋物寸法である。また、包袋物の厚み以外の包袋物寸法は特に制限されず、好ましくは、略直方体状となるものでは、縦及び横とも包袋物の厚みのおよそ2倍以上10倍以下であれば設置に適する。   Moreover, the shape of the bag used for the premixed mortar bag of the present invention is not particularly limited. Preferably, it has a rectangular parallelepiped shape having a predetermined bag thickness width. Also, the size of the bag is not particularly limited except for the thickness of the bag containing premixed mortar. The thickness of the premixed mortar bag is preferably 200 mm or less. The lower limit value of the thickness is not particularly limited. When the thickness exceeds 200 mm, the center of gravity of the entire load may become too high when stacked and stacked in multiple stages, which is not appropriate because it is difficult to ensure installation stability. Here, the thickness of the bag is the size of the bag in the stacking height direction when the pre-mixed mortar is to be stacked. In addition, the size of the wrapped material other than the thickness of the wrapped material is not particularly limited. Preferably, the material having a substantially rectangular parallelepiped shape is suitable for installation as long as it is approximately 2 to 10 times the thickness of the wrapped material both vertically and horizontally. .

また、本発明のプレミックスモルタル包袋物は、包袋物内部の空隙が少ない方が好ましい。さらに防湿対策から包袋物のプレミックスモルタル投入口は密封状態にしておくのが望ましい。   Moreover, it is preferable that the premixed mortar wrapping material of the present invention has less voids inside the wrapping material. Furthermore, it is desirable to keep the premix mortar inlet of the packaged bag sealed in order to prevent moisture.

また、本発明のプレミックスモルタル包袋物に収納されるプレミックスモルタルは、単位体積あたりの質量が、1000kg/m3以下のモルタルが好適である。下限値は特には制限されない。好ましくは、100kg/m3とする。1000kg/m3以下のプレミックスモルタルを収納した包袋物では、容積の割にはかなり軽量な為、一般に摩擦力が低く、積載時に荷崩れを起こし易くなるが、本発明の包袋物では十分な滑り抵抗を確保できる。また、プレミックスモルタルは、少なくともセメントと細骨材の乾式混合物で、必要に応じて混和剤・材が添加配合されたものである。任意付加材料である混和剤・材は、モルタルやコンクリートに使用できるものなら特に限定されない。例えば、分散剤(減水剤、高性能減水剤、高性能AE減水剤、AE減水剤又は流動化剤と称するものを含む。)、保水剤、膨張材、収縮低減剤、気泡剤、空気連行剤、消泡剤、凝結促進剤、凝結遅延剤、増粘剤、ポゾラン反応性物質、繊維、ポリマーディスパージョン、再乳化粉末樹脂、抗菌剤、顔料等を挙げることができる。また、細骨材は限定されないが、軽量骨材や超軽量骨材を使用すると低容重のプレミックスモルタルが得られやすいので好ましい。より好ましくは、細骨材の最大粒子径が1mm以下の細骨材を使用する。また、セメントは水硬性のものであれば、何れのセメントでも使用できる。 The premix mortar stored in the premix mortar bag of the present invention is preferably a mortar having a mass per unit volume of 1000 kg / m 3 or less. The lower limit is not particularly limited. Preferably, it is 100 kg / m 3 . In the case of a bag containing 1000 kg / m 3 or less of premixed mortar, it is quite lightweight for its volume, so it generally has a low frictional force and tends to collapse when loaded. Slip resistance can be secured. The premix mortar is a dry mixture of at least cement and fine aggregate, and is admixed with admixtures and materials as necessary. The admixture / material which is an optional additional material is not particularly limited as long as it can be used for mortar and concrete. For example, dispersants (including water-reducing agents, high-performance water-reducing agents, high-performance AE water-reducing agents, AE water-reducing agents or fluidizing agents), water retention agents, expansion materials, shrinkage reducing agents, foaming agents, air entraining agents , Antifoaming agents, setting accelerators, setting retarders, thickeners, pozzolanic reactive substances, fibers, polymer dispersions, re-emulsified powder resins, antibacterial agents, pigments and the like. Further, although the fine aggregate is not limited, it is preferable to use a lightweight aggregate or an ultralight aggregate because a low-volume premix mortar is easily obtained. More preferably, a fine aggregate having a maximum particle diameter of 1 mm or less is used. Further, any cement can be used as long as it is hydraulic.

また、本発明のプレミックスモルタル包袋物は、例えば施工現場等へ搬送し、開封後混練機中で水を加えて混練すれば打設使用可能なフレッシュモルタルを容易に得ることができる。   Moreover, the pre-mixed mortar wrapping product of the present invention can be easily obtained by placing it in a kneader after opening, for example, by adding water and kneading it in a kneader.

以下、実施例により本発明を具体的に詳しく説明するが、本発明は以下に表す実施例に限定されるものではない。   EXAMPLES Hereinafter, although an Example demonstrates this invention concretely in detail, this invention is not limited to the Example represented below.

以下に表す超軽量細骨材(A1〜A2)又は普通細骨材(A3)とセメント(B)を表1に表す配合質量となるようレーディゲミキサ(容積100リットル)に投入し、乾式混合を約1分間行い、プレミックスモルタルを作製した。各プレミックスモルタル約10kgを、以下に表す紙厚さのクラフト紙(C1〜C5)又は樹脂フィルム(D)からなる、横50cm×幅35cm×高さ8cmの略直方体状の袋に表2の組み合わせとなるよう充填し、袋の投入口を密封して包袋物を得た。   The ultralight lightweight aggregate (A1 to A2) or ordinary fine aggregate (A3) and cement (B) shown below are put into a Laedige mixer (volume: 100 liters) so as to have the blending mass shown in Table 1, and dry mixing is performed. This was carried out for 1 minute to prepare a premixed mortar. About 10 kg of each premix mortar is placed in a substantially rectangular parallelepiped bag of width 50 cm × width 35 cm × height 8 cm made of kraft paper (C1 to C5) or resin film (D) having the following paper thickness: Filled into a combination and sealed the bag inlet to obtain a bag.

A1;真珠岩系人工軽量骨材(容重0.1kg/L、最大粒径0.6mm)
A2;真珠岩系人工軽量骨材(容重0.2kg/L、最大粒径3mm)
A3;石灰石砕石(容重1.7kg/L、最大粒径1mm)
B;普通ポルトランドセメント(太平洋セメント社製)
C1;クラフト紙(厚さ75μm、縦方向引張強度2.3kN/m、横方向引張強度1.2kN/m)
C2;クラフト紙(厚さ130μm、縦方向引張強度4kN/m、横方向引張強度2.1kN/m)
C3;クラフト紙(厚さ400μm、縦方向引張強度12.5kN/m、横方向引張強度5.9kN/m)
C4;クラフト紙(厚さ800μm、縦方向引張強度25.1kN/m、横方向引張強度12.0kN/m)
C5;クラフト紙(厚さ1600μm、縦方向引張強度50.4kN/m、横方向引張強度24.3kN/m)
D;ポリエチレンフィルム(厚さ250μm)
A1: Pearlite-based artificial lightweight aggregate (weight 0.1 kg / L, maximum particle size 0.6 mm)
A2: Pearlite-based artificial lightweight aggregate (weight 0.2kg / L, maximum particle size 3mm)
A3: Limestone crushed stone (weight 1.7kg / L, maximum particle size 1mm)
B: Ordinary Portland cement (manufactured by Taiheiyo Cement)
C1; Kraft paper (thickness 75 μm, longitudinal tensile strength 2.3 kN / m, transverse tensile strength 1.2 kN / m)
C2: Kraft paper (thickness 130 μm, longitudinal tensile strength 4 kN / m, transverse tensile strength 2.1 kN / m)
C3: Kraft paper (thickness 400 μm, longitudinal tensile strength 12.5 kN / m, transverse tensile strength 5.9 kN / m)
C4: Kraft paper (thickness 800 μm, longitudinal tensile strength 25.1 kN / m, transverse tensile strength 12.0 kN / m)
C5: Kraft paper (thickness 1600 μm, longitudinal tensile strength 50.4 kN / m, transverse tensile strength 24.3 kN / m)
D: Polyethylene film (thickness 250 μm)

Figure 2009154957
Figure 2009154957

得られたプレミックスモルタル包袋物は、110×125cmの設置面を有する木製パレット上に、5段重ね及び10段重ねした。パレットへの包袋物の積載は極力同じ状態とし、パレット積載の包袋物は紐や特別な装置等を用いてのパレット上への或いは包袋物間の固定は一切行わなかった。この包袋物を積載したパレットを、フォークリフトで100mの実質無傾斜の平坦な道を、それぞれ10往復(計2000m)走行中の平均速度10km/時で搬送した。2000m走行の間にパレット積載物の一部ても荷崩れした場合の回数を調べた。尚、荷崩れしたものは、その都度元の積載状態に整えた上で、残りの距離を搬送し、さらに荷崩れ発生の回数を調べた。この結果を表1に併せて記す。   The obtained premixed mortar wrapping was stacked on a wooden pallet having an installation surface of 110 × 125 cm, and stacked in 10 and 10 layers. The pallet loading was kept in the same state as much as possible, and the pallet loading was not fixed on the pallet or between the wrappings using a string or a special device. The pallet loaded with the wrapping material was conveyed by a forklift on a 100 m long, non-inclined flat road at an average speed of 10 km / hour during 10 round trips (total of 2000 m). The number of times when a part of the pallet load collapsed while traveling 2000 m was examined. In addition, after the cargo collapsed, the original loading state was adjusted each time, and the remaining distance was conveyed, and the number of occurrences of cargo collapse was further examined. The results are also shown in Table 1.

表1の結果より、本発明品のプレミックスモルタルは何れもパレットにかなりの段数まで積み重ねても荷崩れを起こし難く、滑り抵抗が高いことがわかる。一方、本発明外の参考品は、何れも荷崩れが頻繁に見られた。   From the results in Table 1, it can be seen that the premixed mortars of the present invention are less likely to collapse even if they are stacked up to a considerable number of pallets, and have high sliding resistance. On the other hand, in all the reference products outside the present invention, load collapse was frequently observed.

Claims (4)

厚さ100〜1000μmの紙製袋に収納されたものであることを特徴とするプレミックスモルタル包袋物。 A premixed mortar wrapping product, which is housed in a paper bag having a thickness of 100 to 1000 μm. 引張強度が2kN/m以上である紙からなる袋であることを特徴とする請求項1記載のプレミックスモルタル包袋物。 The premixed mortar bag according to claim 1, wherein the bag is made of paper having a tensile strength of 2 kN / m or more. 収納されるプレミックスモルタルの単位体積あたりの質量が、1000kg/m3以下であることを特徴とする請求項1又は2記載のプレミックスモルタル包袋物。 The premix mortar wrapping according to claim 1 or 2, wherein the premix mortar to be stored has a mass per unit volume of 1000 kg / m 3 or less. プレミックスモルタル収納物の厚みが200mm以下であることを特徴とする請求項1〜3何れか記載のプレミックスモルタル包袋物。 The premix mortar wrapping according to any one of claims 1 to 3, wherein the premix mortar container has a thickness of 200 mm or less.
JP2007338672A 2007-12-28 2007-12-28 Premix mortar package Pending JP2009154957A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003160174A (en) * 2001-11-27 2003-06-03 Denki Kagaku Kogyo Kk Cement premix product
JP2004217285A (en) * 2003-01-17 2004-08-05 Technica Sanwa:Kk Multilayer paper bag
JP2007262603A (en) * 2006-03-28 2007-10-11 Daio Paper Corp Kraft paper usable as decorating paper or reinforcing paper of kraft paper bag

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003160174A (en) * 2001-11-27 2003-06-03 Denki Kagaku Kogyo Kk Cement premix product
JP2004217285A (en) * 2003-01-17 2004-08-05 Technica Sanwa:Kk Multilayer paper bag
JP2007262603A (en) * 2006-03-28 2007-10-11 Daio Paper Corp Kraft paper usable as decorating paper or reinforcing paper of kraft paper bag

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