JP2016098145A - Granulated cement and method for manufacturing the same - Google Patents
Granulated cement and method for manufacturing the same Download PDFInfo
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- 239000004568 cement Substances 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims description 14
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 239000000463 material Substances 0.000 claims abstract description 32
- 239000002131 composite material Substances 0.000 claims abstract description 10
- 238000007906 compression Methods 0.000 claims abstract description 10
- 230000006835 compression Effects 0.000 claims abstract description 10
- 235000014593 oils and fats Nutrition 0.000 claims abstract description 4
- 238000005469 granulation Methods 0.000 claims description 6
- 230000003179 granulation Effects 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 238000010298 pulverizing process Methods 0.000 claims description 6
- 239000002562 thickening agent Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 4
- 238000011282 treatment Methods 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims 2
- 238000010304 firing Methods 0.000 claims 1
- 238000011221 initial treatment Methods 0.000 claims 1
- 239000002245 particle Substances 0.000 abstract description 16
- 239000004567 concrete Substances 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 7
- 238000012986 modification Methods 0.000 abstract description 2
- 230000004048 modification Effects 0.000 abstract description 2
- 230000008719 thickening Effects 0.000 abstract description 2
- 238000005470 impregnation Methods 0.000 abstract 2
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 239000012615 aggregate Substances 0.000 description 5
- 238000006703 hydration reaction Methods 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000003925 fat Substances 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 239000002352 surface water Substances 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- OWEGMIWEEQEYGQ-UHFFFAOYSA-N 100676-05-9 Natural products OC1C(O)C(O)C(CO)OC1OCC1C(O)C(O)C(O)C(OC2C(OC(O)C(O)C2O)CO)O1 OWEGMIWEEQEYGQ-UHFFFAOYSA-N 0.000 description 1
- GUBGYTABKSRVRQ-XLOQQCSPSA-N Alpha-Lactose Chemical compound O[C@@H]1[C@@H](O)[C@@H](O)[C@@H](CO)O[C@H]1O[C@@H]1[C@@H](CO)O[C@H](O)[C@H](O)[C@H]1O GUBGYTABKSRVRQ-XLOQQCSPSA-N 0.000 description 1
- 239000004375 Dextrin Substances 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- 229930091371 Fructose Natural products 0.000 description 1
- RFSUNEUAIZKAJO-ARQDHWQXSA-N Fructose Chemical compound OC[C@H]1O[C@](O)(CO)[C@@H](O)[C@@H]1O RFSUNEUAIZKAJO-ARQDHWQXSA-N 0.000 description 1
- 239000005715 Fructose Substances 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- GUBGYTABKSRVRQ-QKKXKWKRSA-N Lactose Natural products OC[C@H]1O[C@@H](O[C@H]2[C@H](O)[C@@H](O)C(O)O[C@@H]2CO)[C@H](O)[C@@H](O)[C@H]1O GUBGYTABKSRVRQ-QKKXKWKRSA-N 0.000 description 1
- GUBGYTABKSRVRQ-PICCSMPSSA-N Maltose Natural products O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@@H]1O[C@@H]1[C@@H](CO)OC(O)[C@H](O)[C@H]1O GUBGYTABKSRVRQ-PICCSMPSSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 1
- GUBGYTABKSRVRQ-QUYVBRFLSA-N beta-maltose Chemical compound OC[C@H]1O[C@H](O[C@H]2[C@H](O)[C@@H](O)[C@H](O)O[C@@H]2CO)[C@H](O)[C@@H](O)[C@@H]1O GUBGYTABKSRVRQ-QUYVBRFLSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 235000010980 cellulose Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- 235000013681 dietary sucrose Nutrition 0.000 description 1
- 239000007884 disintegrant Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000008101 lactose Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 229960004793 sucrose Drugs 0.000 description 1
- 235000000346 sugar Nutrition 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
本発明は、モルタル又はコンクリートの高強度化や流動性を向上させる様にした造粒セメント及び該造粒セメントの製造法に関する。 The present invention relates to a granulated cement and a method for producing the granulated cement, which are intended to improve the strength and fluidity of mortar or concrete.
従来、コンクリートは、コンクリートプラントにおいて骨材、セメント、水を配合、混練して、生コン車により現場まで運搬するのが一般的であるが、混練直後から水和反応が進行して徐々に流動性が無くなるため、生コン車からポンプに投入し該ポンプにより圧送し打設する過程で、ホース内で固化してしまうことが頻繁に発生していた。そこで、この不具合を解消するための手段として、セメントと骨材のみを予め混合した状態で運搬し、現場で水を加えて混練し製造したコンクリートを打設する、所謂ドライバッチ方式のコンクリート製造法が開発された。 Conventionally, concrete is generally mixed and kneaded with aggregate, cement, and water in a concrete plant, and transported to the site by a ready-mixed car. Therefore, in the process of being put into a pump from a ready-mixed car and pumped and driven by the pump, it frequently occurred to solidify in the hose. Therefore, as a means for solving this problem, a so-called dry-tatch type concrete manufacturing method in which only cement and aggregate are transported in a premixed state, and concrete produced by adding water and kneading on-site is placed. Was developed.
又、コンクリートの高強度化や流動性の向上には、低い水セメント比で配合することが不可欠であり、低い水セメント比のコンクリートに高い流動性を付与するには、高性能ＡＥ減水剤を使用したり、コンクリート配合を工夫する等で対応するのが一般的である。 In addition, it is indispensable to mix with a low water cement ratio in order to increase the strength and fluidity of the concrete. To impart high fluidity to concrete with a low water cement ratio, a high performance AE water reducing agent is used. It is common to use it or to devise concrete blending.
しかし、上記ドライバッチ方式にあっては、表面水を有する骨材とセメントが混合されることから、セメントが表面水により水和反応してしまうため、打設現場到着後に水を加えて混練しても、所要の流動性を得ることができなかった。 However, in the dry-tatch method, since the aggregate having surface water and the cement are mixed, the cement hydrates with the surface water, so water is added and kneaded after arrival at the setting site. However, the required fluidity could not be obtained.
そこで、セメントを、セメントの成分の少なくとも一部を溶解する溶解液、具体的には糖類（果糖、ブドウ糖、マルトース、サッカロース、ラクトース、セルロース、デンプン、デキストリン等）と水酸化物（水酸化ナトリウムや水酸化カリウム等）を含有する水溶液である溶解液を、セメント粒子の表面に比較的均質に行き渡らせるように処理することで、セメント粒子の表面に、セメントの成分の溶解物によるコーティング層を形成し、セメント粒子の水との接触を防止して、ごく初期の水和反応速度を低下させて流動性を向上させる方法（例えば、特許文献１参照）が見受けられる。 Therefore, cement is a solution that dissolves at least part of the components of the cement, specifically sugars (fructose, glucose, maltose, saccharose, lactose, cellulose, starch, dextrin, etc.) and hydroxides (sodium hydroxide, A coating layer is formed on the cement particle surface by dissolving the solution, which is an aqueous solution containing potassium hydroxide, etc., on the surface of the cement particle relatively uniformly. However, a method of preventing fluid contact of cement particles with water and reducing the very early hydration reaction rate to improve fluidity (see, for example, Patent Document 1) can be seen.
しかし、上記従来技術にあっては、セメント粒子の内部深くまで溶解したり、セメント粒子の大部分を溶解したりするものではないものの、セメント粒子の表面を溶解させてその溶解物のコーティング層を形成することから、セメント粒子の一部を変成させてしまうことを理由に、養生硬化後のコンクリート強度が低下してしまう懸念を排除できないなど、解決せねばならない課題があった。 However, in the above prior art, although it does not dissolve deep inside the cement particles or dissolve most of the cement particles, the surface of the cement particles is dissolved to form a coating layer of the dissolved product. There is a problem that needs to be solved, for example, the concern that the concrete strength after curing and curing is reduced cannot be excluded because the formation of the cement particles causes a part of the cement particles to be transformed.
本発明は、上記従来技術に基づく、養生硬化後のコンクリートの強度低下が懸念される課題に鑑み、少なくともセメント及び油脂類を含む複合材料の混練材の圧縮造粒体である造粒セメントを使用することによって、セメント粒子の変成を完全に防止可能にして、上記課題を解決する。 The present invention uses a granulated cement which is a compression granulated body of a kneading material of a composite material containing at least cement and oils and fats, in view of the problem that the strength of concrete after curing is feared based on the above-described conventional technology. By doing so, the modification of the cement particles can be completely prevented and the above-mentioned problems are solved.
要するに本発明は、少なくともセメント及び油脂類を含む複合材料の混練材の圧縮造粒体であるので、該圧縮造粒体の表面側から中心側へ徐々に水が浸透し表面側から徐々に崩れていくか、ある程度浸透した段階で複数の小塊に割裂することを繰り返して、完全にセメント粒子化して通常のセメントと同じ状態になることから、各セメント粒子と水とを同時にではなく断続的に接触させることになるため、セメントの硬化スピードを抑えることが出来、かかる造粒セメントにあっては、例えドライバッチ方式でコンクリートを製造したとしても、骨材の表面水による水和反応は表面側のセメントだけに抑えることが出来るため、現場での加水混練により所要の流動性を得ることが出来、而も粒状に成形されていることから、水セメント比の低減化を図ることが出来るため、モルタル又はコンクリートの高流動化及び高強度化を図ることが出来、更に各セメント粒子の表面が変成されていないため、この造粒セメントを使用したモルタル又はコンクリートの養生硬化後の強度低下を防止することが出来る。 In short, since the present invention is a compression granulated body of a composite material containing at least cement and fats and oils, water gradually permeates from the surface side to the center side of the compressed granulated body and gradually collapses from the surface side. Or repeatedly splitting into multiple lumps at a certain level of penetration, and completely cemented into the same state as normal cement, so each cement particle and water are intermittent rather than simultaneously This makes it possible to reduce the cement hardening speed. In such a granulated cement, even if the concrete is produced by the dry-batch method, the hydration reaction of the surface water of the aggregate is the surface. Since it can be suppressed to only the cement on the side, the required fluidity can be obtained by on-site hydro-kneading, and the water cement ratio is low because it is formed into a granular shape. Since the surface of each cement particle is not modified, the curing of mortar or concrete using this granulated cement can be achieved. It is possible to prevent a decrease in strength after curing.
而も、上記材料に増粘材を添加したので、材料をより効果的に押し固めることが出来るため、形状維持効果を向上させることが出来、よって保管時、圧送時の相互接触による割裂を抑止することが出来、更に上記材料に崩壊材を添加したので、含浸水分量が僅かであっても、内在する崩壊材の効果により、造粒セメントに亀裂が生じたり造粒セメント自体が割裂させられ小塊化されるため、造粒セメントをセメント粒子化し易くすることが出来る。 In addition, the addition of a thickener to the above materials enables the material to be more effectively pressed and hardened, thus improving the shape maintenance effect and thus preventing splitting due to mutual contact during storage and pumping. In addition, since the disintegrating material is added to the above materials, even if the amount of impregnated water is small, the granulated cement is cracked or the granulated cement itself is split due to the effect of the disintegrating material. Since it is agglomerated, the granulated cement can be easily made into cement particles.
前記複合材料の混合撹拌工程と、該混合撹拌工程による１次処理材料の粉砕・解砕工程と、該粉砕・解砕工程による２次処理材料の圧縮造粒工程とを有しているので、簡単に造粒セメントを製造することが出来、而も前記圧縮造粒工程後に焼成工程を行うので、表面が硬化した造粒セメントを製造できるため、水中で完全にセメント粒子化されるまでのスピードが極めて遅い造粒セメントを簡単に製造できる等その実用的効果甚だ大である。 Since it has a mixing and stirring step of the composite material, a pulverizing and pulverizing step of the primary processing material by the mixing and stirring step, and a compression granulation step of the secondary processing material by the pulverizing and pulverizing step, The granulated cement can be easily manufactured, and since the baking process is performed after the compression granulation process, the granulated cement with a hardened surface can be manufactured. However, its practical effects such as the ability to easily produce granulated cement that is extremely slow are enormous.
本発明に係る造粒セメントにあつては、少なくともセメント及び油脂類を含む複合材料の混練材の圧縮造粒体で、上記複合材料に増粘材又は崩壊材の一方又は両方を添加することも可能とする。 For the granulated cement according to the present invention, it is possible to add one or both of a thickener or a disintegrant to the composite material in a compressed granulated body of a composite material containing at least cement and oils and fats. Make it possible.
油脂類は、植物性、鉱物性を問わず適宜選択して使用する。 Fats and oils are appropriately selected and used regardless of plant nature or mineral nature.
崩壊材は、水を吸収すると、造粒セメントを内側から崩壊させる性質を有するものを使用する。 As the disintegrating material, a material having the property of disintegrating the granulated cement from the inside when water is absorbed is used.
増粘材は、混合材料の粘性を向上させて粒状化させ易くする性質を有するものを使用する。 As the thickener, a material having the property of improving the viscosity of the mixed material to facilitate granulation is used.
次に、本発明に係る造粒セメントの製造方法について説明する。
セメント、油脂類、崩壊材及び増粘材を同時又は順次混合撹拌機に投入して１次処理材料とし、次に１次処理材料を粉砕機又は混練機に投入して２次処理材料とし、２次処理材料をロール型圧縮造粒機（ブリケッティングマシン）、打錠機（タブレッティングマシン）等の圧縮造粒機に投入して所定形状の造粒セメントを連続的に圧縮造粒する。
尚、上記方法により製造された造粒セメントを焼成して、表面を硬化させても良い。
Next, the manufacturing method of the granulated cement which concerns on this invention is demonstrated.
Cement, fats and oils, disintegrating material and thickening material are simultaneously or sequentially added to a mixing stirrer to be a primary processing material, then the primary processing material is input to a pulverizer or a kneader to be a secondary processing material, The secondary treatment material is put into a compression granulator such as a roll-type compression granulator (briqueting machine), a tableting machine (tabletting machine), etc., and granulated cement of a predetermined shape is continuously compressed and granulated. .
In addition, the granulated cement manufactured by the said method may be baked and the surface may be hardened.
例えば、２次処理工程及び圧縮造粒工程について具体的に説明すると、
回転軸に複数枚１組のカッターが上下方向に複数段配された回転カッターの外周にスクリーンを配設したパワーミルにより、投入された１次処理材料をカッターで粉砕し粒径の小さい粒状にし、スクリーンの穴を通過させて排出し、排出された粒状の１次処理材料、即ち２次処理材料を、ブリケッティングマシンのホッパに投入し、加圧ロールの外周面間の摩擦力により一対の加圧ロール間に複合材料が食い込み、ポケット内に詰め込まれた状態で圧縮されて、ポケットの形状と同じ造粒セメントが形成される。
For example, specifically explaining the secondary treatment step and the compression granulation step,
With a power mill in which a screen is arranged on the outer periphery of a rotary cutter in which a plurality of cutters are arranged in a vertical direction on a rotating shaft, the input primary processing material is pulverized with a cutter into a small particle size, The particulate primary processing material, that is, the secondary processing material, which has been discharged through the screen hole is put into a hopper of a briquetting machine, and a pair of frictional forces between the outer peripheral surfaces of the pressure rolls are applied. The composite material bites in between the pressure rolls and is compressed in a state of being packed in the pocket to form a granulated cement having the same shape as the pocket.
つまり、この造粒セメントによりモルタル又はコンクリートを製造すれば、水との接触により表面側のセメントから順次水和反応し、造粒セメントが徐々に崩れ、露出して水に接触したセメントから順次水和反応するという段階を経て、全てのセメント粒子が水和反応するため、通常のセメントより硬化スピードを抑えることが可能になる。 In other words, if mortar or concrete is produced with this granulated cement, the surface side cement will undergo a hydration reaction sequentially by contact with water, the granulated cement will gradually collapse, and the exposed cement will come into contact with water. All cement particles undergo a hydration reaction after a step of summing reaction, so that it is possible to suppress the curing speed compared to ordinary cement.
又、水が含浸しても崩れないことも有り得るが、内在する崩壊材の効果により、造粒セメントに亀裂を入れて崩れ易い状態にするか、完全に崩れてしまう。 Moreover, even if impregnated with water, it may not collapse, but due to the effect of the inherent disintegrating material, the granulated cement is cracked so as to be easily collapsed or completely collapsed.
よって、この造粒セメントによれば、ドライバッチ方式であっても対応可能で、現場でセメント、骨材及び水を混練する場合であっても、通常のセメントに比し隙間が多く、表面積も小さいため、ホース内を圧送させることが容易化され、増粘材が添加された造粒セメントは形状維持効果を有するため、圧送中に相互衝突しても割裂し難くすることが可能になる。 Therefore, according to this granulated cement, it is possible to cope with the dry hatch method, even when cement, aggregate and water are kneaded on-site, there are more gaps and surface area than ordinary cement. Since it is small, it is easy to pump the inside of the hose, and since the granulated cement to which the thickener is added has a shape maintaining effect, it is possible to make it difficult to split even if they collide with each other during the pumping.
Claims (5)
前記複合材料の混合撹拌工程と、該混合撹拌工程による１次処理材料の粉砕・解砕工程と、該粉砕・解砕工程による２次処理材料の圧縮造粒工程とを有することを特徴とする造粒セメントの製造法。 A method for producing a granulated cement according to any one of claims 1 to 3,
It has the mixing stirring process of the said composite material, the grinding | pulverization / disintegration process of the primary treatment material by this mixing stirring process, and the compression granulation process of the secondary treatment material by this grinding | pulverization / disintegration process, It is characterized by the above-mentioned. Manufacturing method of granulated cement.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019157564A (en) * | 2018-03-15 | 2019-09-19 | 有限会社中部植生 | Spray method of mortar or concrete, and spray device of the same |
| JP2019210610A (en) * | 2018-05-31 | 2019-12-12 | 有限会社中部植生 | Hydration system |
| JP2022067682A (en) * | 2020-10-21 | 2022-05-09 | 三和産業株式会社 | Compression hardening device for granulated cement |
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| JPH03199146A (en) * | 1989-12-28 | 1991-08-30 | Sumitomo Cement Co Ltd | Spheroidal cement and production thereof |
| JPH07109154A (en) * | 1993-10-08 | 1995-04-25 | Kotoo:Kk | Powdery cement |
| JPH07144942A (en) * | 1993-11-18 | 1995-06-06 | Ohbayashi Corp | Method for inhibiting hydration reaction of cement by coating |
| JP2008536792A (en) * | 2005-04-19 | 2008-09-11 | ラファルジュ | Method for compacting hydraulic binder and novel pulverized pellets |
| JP2013147359A (en) * | 2012-01-17 | 2013-08-01 | Asahi Giken:Kk | Granulated cement, and method for producing granulated cement |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03199146A (en) * | 1989-12-28 | 1991-08-30 | Sumitomo Cement Co Ltd | Spheroidal cement and production thereof |
| JPH07109154A (en) * | 1993-10-08 | 1995-04-25 | Kotoo:Kk | Powdery cement |
| JPH07144942A (en) * | 1993-11-18 | 1995-06-06 | Ohbayashi Corp | Method for inhibiting hydration reaction of cement by coating |
| JP2008536792A (en) * | 2005-04-19 | 2008-09-11 | ラファルジュ | Method for compacting hydraulic binder and novel pulverized pellets |
| JP2013147359A (en) * | 2012-01-17 | 2013-08-01 | Asahi Giken:Kk | Granulated cement, and method for producing granulated cement |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019157564A (en) * | 2018-03-15 | 2019-09-19 | 有限会社中部植生 | Spray method of mortar or concrete, and spray device of the same |
| JP2019210610A (en) * | 2018-05-31 | 2019-12-12 | 有限会社中部植生 | Hydration system |
| JP2022067682A (en) * | 2020-10-21 | 2022-05-09 | 三和産業株式会社 | Compression hardening device for granulated cement |
| JP7281820B2 (en) | 2020-10-21 | 2023-05-26 | 三和産業株式会社 | Compression hardening equipment for granulated cement |
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| JP6067656B2 (en) | 2017-01-25 |
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