JPH09227183A - Porous particulate cement and its production - Google Patents
Porous particulate cement and its productionInfo
- Publication number
- JPH09227183A JPH09227183A JP2923196A JP2923196A JPH09227183A JP H09227183 A JPH09227183 A JP H09227183A JP 2923196 A JP2923196 A JP 2923196A JP 2923196 A JP2923196 A JP 2923196A JP H09227183 A JPH09227183 A JP H09227183A
- Authority
- JP
- Japan
- Prior art keywords
- cement
- porous
- granulated
- admixture
- porous granulated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/0068—Ingredients with a function or property not provided for elsewhere in C04B2103/00
- C04B2103/0089—Agents for reducing heat of hydration
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は新規なセメント及び
その製造方法、特にセメントの球状の多孔質造粒体から
なる多孔質造粒セメント及びその製造方法に関する。TECHNICAL FIELD The present invention relates to a novel cement and a method for producing the same, and more particularly to a porous granulated cement comprising a spherical porous granule of cement and a method for producing the same.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】従来よ
り、高機能性素材の一つとしてマイクロカプセルがあ
り、多くの分野で研究開発が進められているが、建設分
野においても、その機能を生かした利用方法が検討され
ている。しかし、特にこれまでの利用分野が医薬・医療
や化粧品、食料品の分野が主であるために、安定性と衛
生性の観点から、使用できる原料（及びその純度）が制
限され、また製造における管理が厳しく、さらに製品の
回収・貯蔵・運搬に手間がかかり、その製造価格はマイ
クロカプセルの容器のみでも非常に高価なものとなって
いた。そこで製造価格を低く抑えることができれば、マ
イクロカプセルの利用分野は建設分野を含めてさらに広
がるものと考えられる。2. Description of the Related Art Conventionally, microcapsules have been one of the highly functional materials and have been researched and developed in many fields. Utilization methods that make the most of it are being studied. However, since the fields of application up to now are mainly in the fields of medicine / medical care, cosmetics, and foods, the raw materials (and their purity) that can be used are limited from the viewpoint of stability and hygiene, and in manufacturing The management was strict, and it took a lot of time to collect, store, and transport the product, and the manufacturing price was very expensive even with the microcapsule container alone. Therefore, if the manufacturing price can be kept low, the fields of application of microcapsules are expected to further expand, including the construction field.
【０００３】[0003]
【課題を解決するための手段】本発明者は前記課題に鑑
み鋭意研究の結果、原料にセメントを使用したセメント
スラリーを噴霧乾燥することによって造粒し、セメント
をマイクロカプセル容器とした“セメントの球状造粒
体”を得ることに成功し、本発明をなすに至った。得ら
れた球状造粒体は表面が多孔質となり、低コストなマイ
クロカプセル容器としても利用可能となるものである。
すなわち本発明は、下記構成の多孔質造粒セメント及び
その製造方法である。 （１）セメントスラリーの噴霧乾燥により得られた球状
の多孔質造粒体よりなることを特徴とする多孔質造粒セ
メント。 （２）球状の多孔質造粒体の粒子径が６０〜２００μｍ
であることを特徴とする請求項１記載の多孔質造粒セメ
ント。 （３）前記（１）項又は（２）項記載の多孔質造粒セメ
ントが混和材料であることを特徴とする多孔質造粒セメ
ント。 （４）多孔質造粒セメントが混和剤を含有するものであ
ることを特徴とする（１）項ないし（３）項のいずれか
に記載の多孔質造粒セメント。 （５）混和剤が、高性能減水剤、高性能ＡＥ減水剤又は
凝結遅延剤から選ばれた１種又は２種以上であることを
特徴とする（４）項記載の多孔質造粒セメント。 （６）混和剤が、蓄熱物質であることを特徴とする請求
項４記載の多孔質造粒セメント。 （７）多孔質造粒セメントの表面又は／及び内部に、メ
チルセルロース、ポリビニルアルコール等のバインダ物
質が付着又は含有してなることを特徴とする（１）項な
いし（６）のいずれかに記載の多孔質造粒セメント。Means for Solving the Problems The inventors of the present invention have conducted extensive studies in view of the above problems, and as a result, spray-dried a cement slurry using cement as a raw material to granulate the cement to make it into a microcapsule container. Succeeded in obtaining a "spherical granulated body", which resulted in the present invention. The obtained spherical granule has a porous surface and can be used as a low-cost microcapsule container.
That is, the present invention is a porous granulated cement having the following constitution and a method for producing the same. (1) A porous granulated cement comprising a spherical porous granulated body obtained by spray drying a cement slurry. (2) The particle size of the spherical porous granules is 60 to 200 μm.
The porous granulated cement according to claim 1, wherein (3) A porous granulated cement according to the item (1) or (2), which is an admixture. (4) The porous granulated cement according to any one of items (1) to (3), wherein the porous granulated cement contains an admixture. (5) The porous granulated cement according to item (4), wherein the admixture is one or more selected from a high-performance water reducing agent, a high-performance AE water reducing agent, and a setting retarder. (6) The porous granulated cement according to claim 4, wherein the admixture is a heat storage substance. (7) The binder material such as methyl cellulose or polyvinyl alcohol is attached or contained on the surface or / and the inside of the porous granulated cement, according to any one of (1) to (6). Porous granulated cement.
【０００４】（８）セメントスラリーを噴霧乾燥して、
球状の多孔質造粒体よりなる造粒セメントを得ることを
特徴とする多孔質造粒セメントの製造方法。 （９）セメントスラリーに混和剤を添加混合し、それを
噴霧乾燥して、混和剤を含有する球状の多孔質造粒体よ
りなる造粒セメントを得ることを特徴とする多孔質造粒
セメントの製造方法。 （１０）セメント４０〜６０重量％からなるセメントス
ラリーを、３０〜３００℃の気中にて噴霧乾燥して粒子
径が６０〜２００μｍの球状の多孔質造粒体よりなる造
粒セメントを得ることを特徴とする多孔質造粒セメント
の製造方法。 （１１）セメント４０〜６０重量％、混和剤０．１〜４
０重量％からなるセメントスラリーを、３０〜３００℃
の気中に噴霧乾燥して粒子径が６０〜２００μｍの球状
の多孔質造粒体よりなる造粒セメントを得ることを特徴
とする多孔質造粒セメントの製造方法。 （１２）セメント４０〜６０重量％からなるセメントス
ラリーを、３０〜３００℃の気中にて噴霧乾燥して粒子
径が６０〜２００μｍの球状の多孔質造粒体よりなる造
粒セメントを得た後、それに液状混和剤を含浸させるこ
とを特徴とする多孔質造粒セメントの製造方法。 （１３）混和剤が、高性能減水剤、高性能ＡＥ減水剤又
は凝結遅延剤から選ばれた１種又は２種以上であること
を特徴とする前記（９）項，（１１）項又は（１２）項
のいずれかに記載の多孔質造粒セメントの製造方法。 （１４）混和剤が、蓄熱物質であることを特徴とする
（９）項，（１１）項又は（１２）項のいずれかに記載
の多孔質造粒セメントの製造方法。(8) Spray drying the cement slurry,
A method for producing a porous granulated cement, characterized in that a granulated cement comprising a spherical porous granulated body is obtained. (9) A porous granulated cement characterized in that an admixture is added to and mixed with cement slurry, and the mixture is spray-dried to obtain a granulated cement composed of a spherical porous granule containing the admixture. Production method. (10) To obtain a granulated cement composed of spherical porous granules having a particle diameter of 60 to 200 μm by spray-drying a cement slurry composed of 40 to 60% by weight of cement in air at 30 to 300 ° C. A method for producing a porous granulated cement, which comprises: (11) Cement 40 to 60% by weight, admixture 0.1 to 4
Cement slurry consisting of 0% by weight at 30 to 300 ° C
A method for producing a porous granulated cement, which comprises spray-drying in air to obtain a granulated cement comprising a spherical porous granulated body having a particle diameter of 60 to 200 μm. (12) Cement slurry consisting of 40 to 60% by weight of cement was spray-dried in the air at 30 to 300 ° C. to obtain granulated cement composed of spherical porous granules having a particle size of 60 to 200 μm. After that, a method for producing a porous granulated cement, which comprises impregnating it with a liquid admixture. (13) The admixture is one or more selected from a high-performance water reducing agent, a high-performance AE water reducing agent or a setting retarder, and the above-mentioned (9), (11) or ( The method for producing a porous granulated cement according to any one of 12). (14) The method for producing a porous granulated cement according to any of (9), (11) or (12), wherein the admixture is a heat storage substance.
【０００５】[0005]
【発明の実施の形態】本発明の実施の形態を説明する。
本発明の多孔質造粒セメントは、以下のごとくして製造
される。 （１）多数のセメント粒子を溶媒（例えば、水）中に分
散し、セメントスラリーとする。 （２）このセメントスラリーを、小さなノズルから加熱
気体中へ噴霧したり、回転円盤から遠心力により微細な
液滴として、加熱気体中に吹き飛ばす。これらの処理操
作時に、噴霧又は吹き飛ばされたスラリーは加熱気体中
において液体（溶媒）の表面張力により小さな球状粒子
体となる。その球状粒子体は、加熱乾燥機内の加熱気体
中を飛行し、自重で落下する間に、溶媒が蒸発し乾燥さ
れ、その残部が穴となり粒子表層に多数の連通細孔とし
て残る。 （３）そのようにして、多孔質で微細な球状の造粒セメ
ントが得られる。原料のセメント粒子径は、１〜８０μ
ｍであるが、得られたそれらの集合体である球状の多孔
質造粒体（多孔質造粒セメント）の粒子径は６０〜２０
０μｍとなる。Embodiments of the present invention will be described.
The porous granulated cement of the present invention is manufactured as follows. (1) A large number of cement particles are dispersed in a solvent (for example, water) to obtain a cement slurry. (2) The cement slurry is sprayed into a heated gas from a small nozzle, or is blown into the heated gas as fine droplets from a rotating disk by centrifugal force. During these processing operations, the sprayed or blown-off slurry becomes small spherical particles in the heated gas due to the surface tension of the liquid (solvent). The spherical particles fly in the heated gas in the heating dryer, and while falling by their own weight, the solvent evaporates and dries, and the remaining part becomes holes and remains as a large number of communicating pores on the surface layer of the particles. (3) In this way, a porous and fine spherical granulated cement is obtained. Raw material cement particle size is 1 ~ 80μ
m, but the particle diameter of the spherical porous granules (porous granulation cement), which are the aggregates obtained, is 60 to 20.
0 μm.
【０００６】次に、上記のごとくして製造された多孔質
造粒セメント（後記、実施例２により製造）の電子顕微
鏡写真を図１に示し、その観察結果から表面状態を説明
する。図１の電子顕微鏡写真から看取されるごとく、造
粒セメントの表面は多数のセメント粒子が集合して多孔
質状態となっていることが理解できる。セメントスラリ
ーを原料として噴霧乾燥法を適用すると、溶媒の表面張
力及びセメント自体の水硬性に基づくバインダー効果に
よって、特殊な添加剤を使用しなくても造粒が可能とな
る。よって本発明によれば、セメント以外の他の粉末を
原料に用いたマイクロカプセルの製造に比べ、製造価格
が安価（セメント自体も安いことと併せて）となる。ま
た、原料セメントの粒子径は１〜８０μｍであるが、こ
の程度の粒子径の原料を用いて噴霧乾燥すると、それら
の集合体である６０〜２００μｍの粒子径の多孔質造粒
体が安定して得られるのである。なお、あまり大きな造
粒粒体は噴霧乾燥途中で崩壊してしまう。Next, an electron micrograph of the porous granulated cement manufactured as described above (manufactured according to Example 2 described later) is shown in FIG. 1, and the surface condition will be described from the observation results. As can be seen from the electron micrograph of FIG. 1, it can be understood that a large number of cement particles are aggregated into a porous state on the surface of the granulated cement. When the spray drying method is applied using cement slurry as a raw material, granulation is possible without using a special additive due to the binder effect based on the surface tension of the solvent and the hydraulic property of the cement itself. Therefore, according to the present invention, the manufacturing cost is lower (combined with the cost of the cement itself) as compared with the manufacturing of microcapsules using powder other than cement as a raw material. Further, the particle diameter of the raw material cement is 1 to 80 μm, but when the raw material cement having such a particle diameter is used and spray-dried, a porous granule having a particle diameter of 60 to 200 μm, which is an aggregate thereof, becomes stable. Can be obtained. It should be noted that too large agglomerated granules collapse during spray drying.
【０００７】ところで、一般にモルタル、コンクリート
等のセメント硬化体の強度は、セメントと骨材からなる
固体材料系の充填性が高い程、大きいとされている。そ
して充填性については、粗骨材と細骨材の連続粒度分布
曲線のＦｕｌｌｅｒ−Ｔｏｍｐｓｏｎ曲線にセメントの
粒度も適合するようにすれば、最密充填状態となること
が知られており、したがって、セメントと骨材をＦｕｌ
ｌｅｒ−Ｔｏｍｐｓｏｎ曲線に合致するように粒度調整
すれば、強度の高いセメント硬化体の製造が可能とな
る。一方、現状のセメント硬化体の粒度分布はＦｕｌｌ
ｅｒ−Ｔｏｍｐｓｏｎ曲線に対して、２μｍ以下の微粉
及び５０〜２００μｍの粗粉が欠落している。しかる
に、本発明の多孔質造粒セメントの粒子径は６０〜２０
０μｍであり、さらに粒形が球状であることから、セメ
ントに添加すると充填性が高くなり、高強度化が発現で
きることとなる。実験において、表１に示す組成のモル
タル（多孔質造粒セメントは実施例１により得られたも
のを使用）を型枠内に入れて、養生硬化させ、圧縮強度
を測定した。その結果を図２に示す。なお、試料Ｎｏ１
（○）は、本発明の多孔質造粒セメントを配合していな
い通常のモルタルであり、試料Ｎｏ２（●）は本発明の
多孔質造粒セメントを１０％置換配合したモルタルであ
り、そして試料Ｎｏ３（▲）は本発明の多孔質造粒セメ
ントを２０％置換配合したモルタルである。By the way, generally, the strength of hardened cement such as mortar and concrete is said to be higher as the filling property of the solid material system consisting of cement and aggregate is higher. Regarding the filling property, it is known that if the particle size of the cement is also adapted to the Fuller-Tampson curve of the continuous particle size distribution curve of the coarse aggregate and the fine aggregate, the close packed state is obtained. Ful cement and aggregate
If the particle size is adjusted so as to match the ler-Tampson curve, it is possible to manufacture a cement hardened product having high strength. On the other hand, the current particle size distribution of hardened cement is Full
The fine powder of 2 μm or less and the coarse powder of 50 to 200 μm are missing from the er-Tampson curve. However, the particle diameter of the porous granulated cement of the present invention is 60 to 20.
Since the particle size is 0 μm and the particle shape is spherical, when added to cement, the filling property becomes high and the strength can be enhanced. In the experiment, mortar having the composition shown in Table 1 (the porous granulated cement obtained in Example 1 was used) was placed in a mold, cured and cured, and the compressive strength was measured. The result is shown in FIG. Sample No. 1
(○) is a normal mortar in which the porous granulated cement of the present invention is not mixed, Sample No. 2 (●) is a mortar in which 10% of the porous granulated cement of the present invention is mixed, and a sample No. 3 (▲) is a mortar containing 20% of the porous granulated cement of the present invention in a substitutional composition.
【０００８】[0008]
【表１】 [Table 1]
【０００９】表１及び図２に示す結果から、モルタル配
合セメントの一部を本発明の多孔質造粒セメントで置換
することによって試験体の重量（充填性）と強度が大き
くなること、そして２０％置換した場合、養生硬化モル
タルの圧縮強度が材令１４〜２８日で２０％以上増大す
ることが理解される。From the results shown in Table 1 and FIG. 2, the weight (fillability) and the strength of the test specimen were increased by replacing a part of the cement containing mortar with the porous granulated cement of the present invention, and 20 It is understood that the compressive strength of the curing mortar increases by 20% or more in 14 to 28 days of age when the content is replaced by%.
【００１０】また、一般に、フレッシュコンクリートの
流動性は、セメントと骨材からなる固体材料系の充填性
が高い程、大きいとされている。なお充填構造について
は、前述のごとく粗骨材と細骨材の連続粒度分布曲線の
Ｆｕｌｌｅｒ−Ｔｏｍｐｓｏｎ曲線にセメントの粒度も
適合するようにすれば、最密充填状態となることが知ら
れており、したがって、セメントと骨材をＦｕｌｌｅｒ
−Ｔｏｍｐｓｏｎ曲線に合致するように粒度調整すれ
ば、流動性の高いフレッシュコンクリートの製造が可能
となる。これを実証するごとく、モルタル配合セメント
の２０％を本発明の多孔質造粒セメントで置換したモル
タルのフロー値は、表１に示すとおり、１０％以上向上
している。したがって、本発明に係る多孔質の球状セメ
ント粒子体を用いると、流動性の高いフレッシュコンク
リートの製造が可能となり、かつ高強度なコンクリート
を製造することが可能となる。Further, it is generally said that the fluidity of fresh concrete is higher as the filling property of the solid material system consisting of cement and aggregate is higher. As for the packing structure, it is known that if the cement particle size is also adapted to the Fuller-Tampson curve of the continuous particle size distribution curve of the coarse aggregate and the fine aggregate as described above, the close packed state is achieved. , Therefore Fuller cement and aggregate
-By adjusting the particle size so as to match the Thompson curve, it is possible to produce fresh concrete having high fluidity. As demonstrated by this, the flow value of mortar obtained by replacing 20% of the mortar-blended cement with the porous granulated cement of the present invention is improved by 10% or more as shown in Table 1. Therefore, when the porous spherical cement particle body according to the present invention is used, it is possible to produce fresh concrete having high fluidity, and it is possible to produce high-strength concrete.
【００１１】さらに本発明の多孔質造粒セメントは、他
の物質を、例えば高性能減水剤、高性能ＡＥ減水剤、凝
結遅延剤等の混和剤あるいはマスコンクリート発熱防止
用の蓄熱物質を内蔵するマイクロカプセルとして利用で
きる。すなわち、本発明の多孔質造粒セメントは、多孔
質であるため、内部に他の物質を含浸又は封入しておけ
ば、経時的に細孔を通して内部の物質が徐々に外部へ放
出する機能を発揮する。よって、本発明の多孔質造粒セ
メントはマイクロカプセルの担体（容器）として利用で
きる。上記、他の物質の含浸又は封入方法としては、以
下の方法が挙げられる。 （ａ）噴霧乾燥する際に、同物質を予め、スラリー中に
セメント粒子と共に溶解又は懸濁しておく。 （ｂ）内部物質を液状となし、これを造粒した後の多孔
質造粒セメントに含浸させる。 多孔質造粒セメントを製造する際に分散剤を添加すると
造粒効果を高められるが、この分散剤は乾燥後は、粒子
内部に保持されることとなる。その結果、分散剤含有セ
メント壁マイクロカプセルとなるが、これをセメントス
ラリーに添加し、練り混ぜを行うと、その後に分散剤が
徐放され、モルタル又はフレッシュコンクリートに高い
流動性を長時間にわたって、持続・付与することができ
る。Further, the porous granulated cement of the present invention contains other substances, for example, a high-performance water reducing agent, a high-performance AE water reducing agent, an admixture such as a setting retarder, or a heat storage substance for preventing heat generation in mass concrete. It can be used as a microcapsule. That is, since the porous granulated cement of the present invention is porous, by impregnating or enclosing another substance inside, it has a function of gradually releasing the substance inside through the pores to the outside. Demonstrate. Therefore, the porous granulated cement of the present invention can be used as a carrier (container) for microcapsules. The following methods may be mentioned as the above-mentioned method of impregnating or encapsulating another substance. (A) When spray-drying, the same substance is dissolved or suspended together with cement particles in a slurry in advance. (B) The internal substance is made liquid and impregnated into the porous granulated cement after granulation. The granulation effect can be enhanced by adding a dispersant during the production of the porous granulated cement, but this dispersant is retained inside the particles after drying. As a result, it becomes a dispersant-containing cement wall microcapsules, this is added to the cement slurry, and when kneaded, the dispersant is gradually released after that, high fluidity to the mortar or fresh concrete over a long period of time, Can be sustained and granted.
【００１２】[0012]
【実施例】本発明の実施例を説明する。 実施例１：普通ポルトランドセメント１ｋｇを水１ｋｇ
に加えて、良く撹拌してセメント５０ｗｔ％（セメント
／水＋セメント）のセメントスラリーを調製した。次い
で、該セメントスラリーをスプレードライヤー「型式Ｆ
ＯＣ−１６」（大川原加工機（株）製）を使用し、下記
条件で噴霧乾燥処理した。 スプレードライヤーディスク回転数：７０００〜１１０
００ｒｐｍ スラリー原液処理量：１０〜３０ｋｇ／ｈ 入口温度：２００℃ 出口温度：９０〜１１０℃ 以上により得られたセメントの球状造粒体は、粒径が６
０〜２００μｍで多孔質のものであった。EXAMPLES Examples of the present invention will be described. Example 1: 1 kg of ordinary Portland cement and 1 kg of water
In addition, the mixture was well stirred to prepare a cement slurry of 50 wt% cement (cement / water + cement). Then, the cement slurry is spray-dried "Type F"
OC-16 "(manufactured by Okawara Koki Co., Ltd.) was used for spray drying under the following conditions. Spray dryer disk speed: 7000-110
00 rpm Slurry stock solution throughput: 10 to 30 kg / h Inlet temperature: 200 ° C. Outlet temperature: 90 to 110 ° C. Spherical granules of cement obtained as above have a particle size of 6
It was 0 to 200 μm and was porous.
【００１３】実施例２：普通ポルトランドセメント１ｋ
ｇと分散剤（マイティー１００（（株）花王製））１０
ｇ、を水１ｋｇに加えて、良く撹拌してセメント ｗｔ
％（セメント／水＋セメント）のセメントスラリーを調
製した。次いで、該セメントスラリーをスプレードライ
ヤー「「型式ＯＤ−２５Ｇ」（大川原加工機（株）製）
を使用し、下記条件で噴霧乾燥処理した。 スプレードライヤーディスク回転数：７０００〜１１０
００ｒｐｍ スラリー原液処理量：１０〜３０ｋｇ／ｈ 入口温度：２００℃ 出口温度：９０〜１１０℃ 以上により得られたセメントの球状造粒体は、粒径が６
０〜２００μｍでほとんどが図１の顕微鏡写真に示すご
とく均一形状の粒揃で、かつ多孔質のものであった。Example 2: Ordinary Portland cement 1k
g and dispersant (Mighty 100 (manufactured by Kao Corporation)) 10
g, added to 1 kg of water, stirred well and cement wt
% (Cement / water + cement) cement slurry was prepared. Then, the cement slurry is spray-dried "Model OD-25G" (manufactured by Okawara Koki Co., Ltd.)
Was spray-dried under the following conditions. Spray dryer disk speed: 7000-110
00 rpm Slurry stock solution throughput: 10 to 30 kg / h Inlet temperature: 200 ° C. Outlet temperature: 90 to 110 ° C. Spherical granules of cement obtained as above have a particle size of 6
As shown in the microphotograph of FIG. 1, most of the particles having a diameter of 0 to 200 μm were of uniform grain shape and were porous.
【００１４】[0014]
【発明の効果】本発明によれは、以下の優れた各種効果
が得られる。 （１）本発明の多孔質造粒セメントを、モルタル又はフ
レッシュコンクリート中のセメントの一部として置換使
用すれば、その養生硬化後に高強度のセメント硬化体を
取得することができる。 （２）また、本発明の多孔質造粒セメントを、モルタル
又はフレッシュコンクリート中のセメントの一部として
置換使用すれば、流動性を向上させることができる。 （３）本発明の多孔質で球状の造粒セメントは、セメン
トを原料とする噴霧乾燥法により容易に製造することが
できる。これには、特殊なバインダーが不要なため、製
造コストを非常に低くすることができる。 （４）本発明の造粒セメントは多孔質であるため、各種
混和剤等の内部物質を含有せしめることができるため、
それを含有したものはその徐放効果があり、マイクロカ
プセルの容器として利用できる。よって、建設分野を含
めた多くの技術分野に使用できる。According to the present invention, the following various excellent effects can be obtained. (1) By using the porous granulated cement of the present invention as a part of the cement in mortar or fresh concrete, it is possible to obtain a high-strength cement hardened body after curing and hardening the cement. (2) In addition, if the porous granulated cement of the present invention is used as a part of cement in mortar or fresh concrete, the fluidity can be improved. (3) The porous and spherical granulated cement of the present invention can be easily manufactured by a spray drying method using cement as a raw material. Since no special binder is required for this, the manufacturing cost can be very low. (4) Since the granulated cement of the present invention is porous, it can contain internal substances such as various admixtures,
Those containing it have a sustained release effect and can be used as a container for microcapsules. Therefore, it can be used in many technical fields including the construction field.
【図１】本発明実施例により得られた多孔質造粒セメン
トの粒子構造を示す電子顕微鏡写真図。FIG. 1 is an electron micrograph showing the particle structure of a porous granulated cement obtained according to an example of the present invention.
【図２】本発明実施例及び比較例によるセメント硬化体
の圧縮強度のグラフ図。FIG. 2 is a graph showing the compressive strength of hardened cement products according to Examples of the present invention and Comparative Examples.
Claims (14)
た球状の多孔質造粒体よりなることを特徴とする多孔質
造粒セメント。1. A porous granulated cement comprising a spherical porous granulated body obtained by spray drying a cement slurry.
０μｍであることを特徴とする請求項１記載の多孔質造
粒セメント。2. A spherical porous granule having a particle size of 60 to 20.
The porous granulated cement according to claim 1, which has a diameter of 0 μm.
が混和材料であることを特徴とする多孔質造粒セメン
ト。3. A porous granulated cement, wherein the porous granulated cement according to claim 1 or 2 is an admixture.
のであることを特徴とする請求項１ないし３のいずれか
に記載の多孔質造粒セメント。4. The porous granulated cement according to any one of claims 1 to 3, wherein the porous granulated cement contains an admixture.
剤又は凝結遅延剤から選ばれた１種又は２種以上である
ことを特徴とする請求項４記載の多孔質造粒セメント。5. The porous granulated cement according to claim 4, wherein the admixture is one or more selected from a high-performance water reducing agent, a high-performance AE water reducing agent and a setting retarder. .
る請求項４記載の多孔質造粒セメント。6. The porous granulated cement according to claim 4, wherein the admixture is a heat storage substance.
に、メチルセルロース、ポリビニルアルコール等のバイ
ンダ物質が付着又は含有してなることを特徴とする請求
項１ないし６のいずれかに記載の多孔質造粒セメント。7. The porous material according to any one of claims 1 to 6, wherein a binder material such as methyl cellulose or polyvinyl alcohol is attached or contained on the surface or / and the inside of the porous granulated cement. Granulated cement.
多孔質造粒体よりなる造粒セメントを得ることを特徴と
する多孔質造粒セメントの製造方法。8. A method for producing a porous granulated cement, which comprises spray-drying a cement slurry to obtain a granulated cement comprising a spherical porous granulated body.
それを噴霧乾燥して、混和剤を含有する球状の多孔質造
粒体よりなる造粒セメントを得ることを特徴とする多孔
質造粒セメントの製造方法。9. An admixture is added to and mixed with the cement slurry,
A method for producing a porous granulated cement, which comprises spray-drying it to obtain a granulated cement composed of a spherical porous granulated body containing an admixture.
ントスラリーを、３０〜３００℃の気中にて噴霧乾燥し
て粒子径が６０〜２００μｍの球状の多孔質造粒体より
なる造粒セメントを得ることを特徴とする多孔質造粒セ
メントの製造方法。10. A granulated cement comprising spherical porous granules having a particle size of 60 to 200 μm, which is obtained by spray-drying a cement slurry composed of 40 to 60% by weight of cement in air at 30 to 300 ° C. A method for producing a porous granulated cement, which comprises:
１〜４０重量％からなるセメントスラリーを、３０〜３
００℃の気中に噴霧乾燥して粒子径が６０〜２００μｍ
の球状の多孔質造粒体よりなる造粒セメントを得ること
を特徴とする多孔質造粒セメントの製造方法。11. Cement 40 to 60% by weight, admixture 0.
Cement slurry consisting of 1 to 40% by weight of 30 to 3
Spray-dried in the air at 00 ° C and the particle size is 60-200 μm
A method for producing a porous granulated cement, characterized in that the granulated cement is obtained from the spherical porous granulated body of 1.
ントスラリーを、３０〜３００℃の気中にて噴霧乾燥し
て粒子径が６０〜２００μｍの球状の多孔質造粒体より
なる造粒セメントを得た後、それに液状混和剤を含浸さ
せることを特徴とする多孔質造粒セメントの製造方法。12. A granulated cement comprising spherical porous granules having a particle size of 60 to 200 μm, which is obtained by spray-drying a cement slurry composed of 40 to 60% by weight of cement in the air at 30 to 300 ° C. A method for producing a porous granulated cement, which comprises impregnating a liquid admixture after obtaining the cement.
水剤又は凝結遅延剤から選ばれた１種又は２種以上であ
ることを特徴とする請求項９，１１又は１２のいずれか
に記載の多孔質造粒セメントの製造方法。13. The admixture is one or more selected from a high-performance water reducing agent, a high-performance AE water reducing agent or a setting retarder, and any one of claims 9, 11 and 12 is characterized. The method for producing a porous granulated cement according to 1.
する請求項９，１１又は１２のいずれかに記載の多孔質
造粒セメントの製造方法。14. The method for producing a porous granulated cement according to claim 9, 11 or 12, wherein the admixture is a heat storage substance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02923196A JP3579806B2 (en) | 1996-02-16 | 1996-02-16 | Porous granulated cement and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02923196A JP3579806B2 (en) | 1996-02-16 | 1996-02-16 | Porous granulated cement and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09227183A true JPH09227183A (en) | 1997-09-02 |
| JP3579806B2 JP3579806B2 (en) | 2004-10-20 |
Family
ID=12270460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02923196A Expired - Fee Related JP3579806B2 (en) | 1996-02-16 | 1996-02-16 | Porous granulated cement and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3579806B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100371397B1 (en) * | 2000-07-26 | 2003-02-06 | 이명규 | Cement mortar composition for gluing tile |
| JP2009196888A (en) * | 2001-09-06 | 2009-09-03 | Wr Grace & Co Connecticut | Method of modifying fresh concrete or coating composition |
-
1996
- 1996-02-16 JP JP02923196A patent/JP3579806B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100371397B1 (en) * | 2000-07-26 | 2003-02-06 | 이명규 | Cement mortar composition for gluing tile |
| JP2009196888A (en) * | 2001-09-06 | 2009-09-03 | Wr Grace & Co Connecticut | Method of modifying fresh concrete or coating composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3579806B2 (en) | 2004-10-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4015229B2 (en) | Cement material | |
| US6500253B2 (en) | Agglomeration of hydraulic cement powder | |
| JPH0323214A (en) | Spherical particles of oxide of rare earth element and production thereof | |
| JPH02289479A (en) | Production of granular nitrogenous fertilizer having mild lasting effect | |
| JPH02164751A (en) | Granular whisker and production thereof | |
| JPH09227183A (en) | Porous particulate cement and its production | |
| US4245054A (en) | Process for the manufacture of a dry mixture for insulating stucco or plaster | |
| JP4797245B2 (en) | Snail pesticide and method | |
| JP2005213139A (en) | Granulated raw material for refractory product, its producing method, and application of granulated raw material | |
| JP2818235B2 (en) | Spherical cement and its production method | |
| JPH10297950A (en) | Concrete for accumulating cold heat | |
| JP2686458B2 (en) | Cement powder composition | |
| JPH0431349A (en) | High-strength cement composition | |
| JPS60221354A (en) | Cement admixture | |
| JPH04226199A (en) | Combined active substance which is released freely | |
| JPS6126541A (en) | Concrete admixing agent | |
| RU2714473C1 (en) | Method of granulating fine-dispersed materials | |
| JP3109972B2 (en) | Granulation of raw materials for ceramics | |
| JP2001253741A (en) | Additive for concrete | |
| Usha et al. | Techniques involved in Conversion of Powders into Granules-An Overview | |
| JPS61266306A (en) | Fine spherical particle of crystalline aluminosilicate and its preparation | |
| JPH0661458B2 (en) | Composition having delayed reactivity or solubility with water or aqueous acid / alkali solution and method for producing the same | |
| RU2096389C1 (en) | Method for production of complex modifier of concrete mixture | |
| JP3343428B2 (en) | Hydration heat inhibitor for cement | |
| JP2004269348A5 (en) | Manufacturing method of ceramic sphere |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Effective date: 20031210 Free format text: JAPANESE INTERMEDIATE CODE: A971007 |
|
| A131 | Notification of reasons for refusal |
Effective date: 20040113 Free format text: JAPANESE INTERMEDIATE CODE: A131 |
|
| A521 | Written amendment |
Effective date: 20040310 Free format text: JAPANESE INTERMEDIATE CODE: A523 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20040615 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20040707 |
|
| R150 | Certificate of patent (=grant) or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| LAPS | Cancellation because of no payment of annual fees |