JPH0639343B2 - Silica fine powder granulated product - Google Patents
Silica fine powder granulated productInfo
- Publication number
- JPH0639343B2 JPH0639343B2 JP4412886A JP4412886A JPH0639343B2 JP H0639343 B2 JPH0639343 B2 JP H0639343B2 JP 4412886 A JP4412886 A JP 4412886A JP 4412886 A JP4412886 A JP 4412886A JP H0639343 B2 JPH0639343 B2 JP H0639343B2
- Authority
- JP
- Japan
- Prior art keywords
- fine powder
- granulated product
- silica fine
- powder
- specific gravity
- 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.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明はシリカ質微粉末造粒品に関し、さらに詳しくは
嵩容積が小さく、分散性にすぐれ、各種の無機製品およ
び有機製品の混和材、添加材等として有用なシリカ質微
粉末造粒品に関するものである。TECHNICAL FIELD The present invention relates to a silica fine powder granulated product, more specifically, a bulk material having a small bulk volume and excellent dispersibility, and an admixture for various inorganic and organic products, The present invention relates to a silica fine powder granulated product useful as an additive or the like.
［従来の技術］ 従来、シリカ質微粉末はその特性と共に比較的豊富に存
在し、入手が容易であることから各種の無機製品および
有機製品の混和材、添加材またはその他の各種の配合材
として広範囲に利用されている。[Prior Art] Silica fine powder has been relatively abundant along with its characteristics and is easily available, so that it can be used as an admixture for various inorganic and organic products, an additive, or other various compounding materials. Widely used.
例えば、シリカ質微粉末はセメント混和材として使用さ
れており、セメントの高強度化、耐久性及び防水性の向
上等に効果があることは一般に知られている。また、キ
ャスタブル耐火物の分野でも、高強度キャスタブル耐火
物として利用されている。他方、合成樹脂、ゴム、セラ
ミックス等の添加材としても利用されている。For example, silica fine powder is used as a cement admixture, and it is generally known that it is effective in increasing the strength of cement, improving durability and waterproofness. It is also used as a high strength castable refractory in the field of castable refractories. On the other hand, it is also used as an additive for synthetic resin, rubber, ceramics and the like.
更に、インクジェット記録用紙や水虫予防用等人体着用
品などの吸水を必要とする物品用にも使用できることが
報告されている。（特開昭55-144172号公報，特開昭56-
145856号公報） この様にシリカ質微粉末は多くの用途に利用されている
が、微粉末であり、嵩高なため、飛散しやすく、その使
用時における取扱いが、作業面及び装置面で非常に困難
なものであった。更に、貯蔵場所等も広大な広さが必要
である等の問題があった。Furthermore, it has been reported that it can also be used for articles requiring water absorption such as ink jet recording paper and articles worn by the human body for preventing athlete's foot. (JP-A-55-144172, JP-A-56-
As described above, the siliceous fine powder is used for many purposes, but since it is a fine powder and is bulky, it easily scatters, and its handling during use is extremely difficult in terms of work and equipment. It was difficult. Further, there is a problem that a storage area and the like need to be vast.
例えば、シリカ質微粉末をコンクリートやプレーミック
ス品に使用する場合、シリカ質微粉末が嵩高であること
により、コンクリート製造プラントやプレミックス品製
造工場での製造時における取り扱いが難しいことや、貯
蔵場所に広大な広さが必要とされていた。For example, when using the siliceous fine powder for concrete or premix products, the bulkiness of the siliceous fine powder makes it difficult to handle at the time of production at a concrete manufacturing plant or a premix product manufacturing plant, or a storage location. It was necessary to have a vast area.
一方、シリカ質微粉末の嵩容量を減少させて取り扱いを
容易にするため、造粒することは粉体工学の分野におい
て公知であるが、得られた造粒品は凝集力が大き過ぎる
ために他の材料と練り混ぜた際に、粒子が解砕し分散し
ないためにシリカ質微粉末の機能が充分に発揮されない
等の問題があった。On the other hand, it is known in the field of powder engineering to granulate in order to reduce the bulk volume of the siliceous fine powder and facilitate handling, but the obtained granulated product has an excessively large cohesive force. When kneaded with other materials, there was a problem that the function of the siliceous fine powder could not be fully exerted because the particles were crushed and not dispersed.
特にシリカ質微粉末をセメント混和材やキャスタブル耐
火物用として使用する場合には、コンクリートの他の材
料と練り混ぜた際に、粒子が解砕（分散）しないと未反
応の非晶質シリカが残存することとなりアルカリ−シリ
カ反応と同様の膨張破壊の現象を生ずる可能性があり、
又、ポゾラン活性等が充分に発揮されないと云う問題点
もあった。さらに、超微粉、セメント、高性能減水剤お
よび水を組み合せて、非常に低水粉体比で流動性が得ら
れる高強度セメント組成物の超微粉としてもシリカ質微
粉末は有用であるが、造粒したものが、容易に分散され
ないと充分な流動性を得ることができないと云う問題点
もあった。Especially when the fine silica powder is used as a cement admixture or castable refractory, unreacted amorphous silica will be generated unless the particles are crushed (dispersed) when mixed with other concrete materials. There is a possibility that it will remain and cause the same phenomenon of expansion failure as the alkali-silica reaction,
There is also a problem that the pozzolanic activity and the like are not sufficiently exhibited. Furthermore, ultrafine powder, cement, a combination of a high-performance water reducing agent and water, the silica fine powder is useful as an ultrafine powder of a high-strength cement composition that can obtain fluidity at an extremely low water-powder ratio, There is also a problem that the granulated product cannot obtain sufficient fluidity unless it is easily dispersed.
［発明が解決しようとする問題点］ 本発明者等は上記のような問題点を解決するために種々
検討を加えた結果、シリカ質微粉末を嵩比重が０．２５
〜０．５の範囲になるような造粒品とすることにより、
運搬、作業時等の取り扱いが容易で、また配合材料とし
て使用する場合、混練時に容易に解砕して分散し、シリ
カ質微粉末に期待されている各種の性能を充分に発揮す
ることができると云う知見を得て本発明を完成するに到
った。[Problems to be Solved by the Invention] As a result of various studies conducted by the present inventors to solve the above problems, the silica fine powder has a bulk specific gravity of 0.25.
By making a granulated product in the range of ~ 0.5,
It is easy to handle during transportation, work, etc., and when used as a compounding material, it can be easily crushed and dispersed during kneading, and can sufficiently exhibit various performances expected of fine silica powder. The present invention has been completed with the knowledge that
［問題点を解決するための手段］ 即ち、本発明は嵩比重が０．２〜０．２５のシリカ質微
粉末を造粒してなる造粒品からなり、その嵩比重が０．
２５〜０．５で、かつ平均粒径が１００〜５００μｍの
範囲にあることを特徴とするコンクリート混和材用シリ
カ質微粉末造粒品である。[Means for Solving Problems] That is, the present invention comprises a granulated product obtained by granulating fine siliceous powder having a bulk specific gravity of 0.2 to 0.25, and a bulk specific gravity of 0.
A silica fine powder granulated product for a concrete admixture, characterized by having an average particle size of 25 to 0.5 and a range of 100 to 500 μm.
以下本発明を詳細に説明する。The present invention will be described in detail below.
本発明のシリカ質微粉末造粒品の造粒に使用されるシリ
カ質微粉末としては、特に制限することはなく通常の製
品を使用することができ、例えばシリコン又は含シリコ
ン合金製造時に副生するシリカ質ダスト等があげられ、
それ等は平均粒径０．１〜０．２μ程度の超微粉であ
る。The siliceous fine powder used for granulating the siliceous fine powder granulated product of the present invention is not particularly limited, and an ordinary product can be used, for example, a by-product during the production of silicon or a silicon-containing alloy. Examples include silica dust that
These are ultrafine powders having an average particle size of about 0.1 to 0.2 μ.
通常、これ等のシリカ質微粉末の嵩比重は０．２〜０．
２５程度であるが、本発明のシリカ質微粉末造粒品は嵩
比重が０．２５〜０．５の範囲になる様に造粒すること
により容易に得ることができる。Usually, the bulk specific gravity of these siliceous fine powders is 0.2 to 0.
Although it is about 25, the silica fine powder granulated product of the present invention can be easily obtained by granulating so that the bulk specific gravity is in the range of 0.25 to 0.5.
造粒方法としては、圧縮成形法、振動造粒法、転動造粒
法、かくはん造粒法、押し出し成形法、噴霧造粒法、流
動乾燥造粒法などが挙げられる。圧縮成形法は、圧縮ロ
ールで板状に成形し解砕したり、ブリケットをつくる方
法である。振動造粒法又は転動造粒法は、円筒や回転皿
などを振動又は転動させる方法である。また、かくはん
造粒法は、パブミルやヘンシェル，アイリッヒなどの回
転羽根のついた装置によりかくはんさせる方法である。
押し出し成形法は、スクリューなどによりダイスから押
し出し造粒させる方法である。また、噴霧造粒法はノズ
ルからスラリー状物質を噴霧させ造粒させる方法であ
る。さらに、流動乾燥造粒方法は、熱風で粉体を流動さ
せ、これにスプレーで液体バインダーを散布して造粒物
を形成させる方法である。Examples of the granulation method include a compression molding method, a vibration granulation method, a tumbling granulation method, a stirring granulation method, an extrusion molding method, a spray granulation method, and a fluidized dry granulation method. The compression molding method is a method of forming a plate shape with a compression roll and crushing it, or making a briquette. The vibration granulation method or the rolling granulation method is a method of vibrating or rolling a cylinder, a rotating dish, or the like. The agitation granulation method is a method of agitating with a device having a rotary blade such as a pub mill, Henschel, and Eirich.
The extrusion molding method is a method of extrusion granulation from a die with a screw or the like. The spray granulation method is a method in which a slurry-like substance is sprayed from a nozzle to granulate. Further, the fluidized dry granulation method is a method in which a powder is fluidized with hot air and a liquid binder is sprayed on the powder to form a granulated product.
通常、上記の各造粒方法において、噴霧造粒法以外には
造粒を行うのに液体バインダーが用いられる。液体バイ
ンダーとしてはメチルセルロース等のセルロース誘導
体、ポリビニルアルコール、アクリル酸系等の各種の高
分子等の水溶液、またアルコール類、トルエン、アセト
ン等の溶剤が使用される。また、その他のバインダーと
してアスファルト、粘土等の無機材料も使用できる。さ
らに、造粒工程において水あるいは湿潤空気等を散布、
送風，通風等により供給し湿気を与えながら造粒を行う
こともできる。Usually, in each of the above-mentioned granulation methods, a liquid binder is used for granulation in addition to the spray granulation method. As the liquid binder, cellulose derivatives such as methyl cellulose, aqueous solutions of various polymers such as polyvinyl alcohol and acrylic acid, and solvents such as alcohols, toluene and acetone are used. Inorganic materials such as asphalt and clay can also be used as other binders. Furthermore, spraying water or moist air in the granulation process,
It is also possible to granulate while supplying moisture by supplying air or ventilation.
他の造粒方法として、シリカ質微粉末が超微粒子である
ことから、湿潤空気によるエアレーションにより造粒を
行うこともできる。第１図は本発明におけるエアーレー
ションを実施する一具体例を示す模式図である。尚、第
１図は本発明の一具体例であって本発明のエアーレーシ
ョンはこの方法に限られるものではない。同第１図に示
す様に、１は送気ポンプであり、乾燥空気は導管２によ
り水の満たされたガス洗浄器３に導かれ、湿潤空気に変
わる。この湿潤空気を穴の開いた多孔板５を通過させ、
シリカ質微粉末の満たされている容器６に吹き込み、エ
アーレーションを実施する。なお、７は布製のフィルタ
ーである。この様に、エアーレーションとは、湿潤空気
でシリカ質微粉末８を吹き上げる操作であり、第１図の
多孔板５を通じ容器６内で実施される。As another granulation method, since the siliceous fine powder is ultrafine particles, granulation can be performed by aeration with wet air. FIG. 1 is a schematic view showing a specific example for carrying out aeration in the present invention. Incidentally, FIG. 1 is a specific example of the present invention, and the aeration of the present invention is not limited to this method. As shown in FIG. 1, reference numeral 1 is an air supply pump, and dry air is introduced into a gas scrubber 3 filled with water by a conduit 2 and converted into wet air. This moist air is passed through the perforated plate 5 having holes,
It is blown into the container 6 filled with the siliceous fine powder to carry out aeration. In addition, 7 is a filter made of cloth. As described above, aeration is an operation of blowing up the siliceous fine powder 8 with wet air, and is carried out in the container 6 through the perforated plate 5 in FIG.
湿潤空気は、ガス洗浄器３に水を入れ送気ポンプ１によ
り空気を送入することにより製造されるが、ガス洗浄器
３の温度は常温が好ましく、加温することも可能であ
る。The moist air is produced by pouring water into the gas scrubber 3 and sending air through the air supply pump 1. The temperature of the gas scrubber 3 is preferably room temperature, and it is possible to heat it.
上記の各造粒方法において、造粒時間、バインダー量、
水分量、湿潤空気の供給量等の各種の条件を適宜に選択
することにより、嵩比重が０．２５〜０．５の範囲のシ
リカ質微粉末を得ることができる。In each of the above granulation methods, granulation time, binder amount,
By appropriately selecting various conditions such as the amount of water and the amount of moist air supplied, fine silica powder having a bulk specific gravity of 0.25 to 0.5 can be obtained.
本発明のシリカ質微粉末造粒品は嵩比重が０．２５〜
０．５，好ましくは０．３〜０．４５の範囲にあること
が望ましく、０．２５以下では嵩容積を減少させる効果
は小さく、０．５を越えると分散性が低下し、特にコン
クリート等に使用した場合、混練時に分散せず所望の効
果を示さない。The silica fine powder granulated product of the present invention has a bulk specific gravity of 0.25 to
It is desirable to be in the range of 0.5, preferably 0.3 to 0.45. When it is 0.25 or less, the effect of reducing the bulk volume is small, and when it exceeds 0.5, the dispersibility is lowered, especially in concrete or the like. When used in the above, it does not disperse during kneading and does not exhibit the desired effect.
なお、本発明における嵩比重とは金属粉末に適用されて
いるＪＩＳ Ｚ２５０４に準じて測定を実施した値であ
る。The bulk specific gravity in the present invention is a value measured according to JIS Z2504 applied to metal powder.
本発明のシリカ質微粉末造粒品の粒径は、好ましくは平
均粒径１００〜５００μ程度、さらに好ましくは１００
〜２００μ程度がよく、１００μ未満の超微粒子になる
と嵩容積が大きくなり嵩比重を大きくした効果が小さ
く、５００μを越えると分散，解砕が不充分となること
がある。The particle size of the silica fine powder granulated product of the present invention is preferably an average particle size of about 100 to 500 μ, more preferably 100.
Approximately 200 μm is preferable, and if the particle size is less than 100 μm, the bulk volume is large and the effect of increasing the bulk specific gravity is small, and if it exceeds 500 μm, dispersion and crushing may be insufficient.
又、シリカ質微粉末造粒品の水分含有量は１〜１５重量
％、好ましくは４〜８重量％が望ましく、１重量％未満
では造粒をすることが難しく、１５重量％を越えると取
り扱いが難しく解砕性が劣る結果となる。Further, the water content of the granulated product of siliceous powder is 1 to 15% by weight, preferably 4 to 8% by weight, and it is difficult to granulate if less than 1% by weight, and if it exceeds 15% by weight, it is handled. Results in poor crushability.
本発明のシリカ質微粉末造粒品はシリカ質微粉末と成分
は同一であるが、造粒品であるために嵩容積が小さく、
また嵩比重が０．２５〜０．５の範囲にあるために造粒
品でも強固に凝結した製品ではなく、適度に凝集した分
散性の良好なものである。The silica fine powder granulated product of the present invention has the same components as the silica fine powder, but the bulk volume is small because it is a granulated product,
Further, since the bulk specific gravity is in the range of 0.25 to 0.5, the granulated product is not a solidified product, but is an appropriately aggregated product with good dispersibility.
特に、湿潤空気でシリカ質微粉末をエアーレーションす
ることにより、粒状の軟集したシリカ質微粉末（以下軟
集シリカという）の造粒品を作ることができる。この軟
集シリカは、コンクリート製造時に使用すれば、完全に
分散し、良好な解砕，分散効果を示すものであり、嵩容
積は微粉末の時の５〜６割となる。In particular, by aerating the siliceous fine powder with wet air, a granulated product of granular softly collected siliceous fine powder (hereinafter referred to as soft silica) can be produced. If this softly-collected silica is used during the production of concrete, it will be completely dispersed, exhibiting good crushing and dispersing effects, and the bulk volume will be 50 to 60% that of fine powder.
上記の様に本発明のシリカ質微粉末造粒品は嵩容積が小
さく、分散性が良好であると共にシリカ質微粉末と同一
成分からなるために、従来、シリカ質微粉末が使用され
ている広範囲の用途に使用することができる。例えば、
コンクリート混和材やキャスタブル耐火物用、セラミッ
クス等の無機製品の添加材として用いられ、特にセラミ
ックス原料である他の微粉末のハンドリングに対しても
使用可能であるが、土木構造物に使用するように、多量
の微粉末を取り扱う場合において、そのメリットが発揮
される。As described above, the siliceous fine powder granulated product of the present invention has a small bulk volume, has good dispersibility, and is composed of the same components as the siliceous fine powder, so that the siliceous fine powder is conventionally used. It can be used for a wide range of applications. For example,
It is used as an additive for concrete admixtures, castable refractories, and inorganic products such as ceramics. It can also be used especially for handling other fine powders that are ceramic raw materials, but it should be used for civil engineering structures. The advantage is exhibited when handling a large amount of fine powder.
また、ゴム、プラスチック等の有機製品の充填材、増強
充填材、添加材として用いられ、さらにインクジェット
記録用紙等の吸水を必要とする物品などにも使用でき
る。Further, it is used as a filling material, reinforcing filling material, and addition material for organic products such as rubber and plastics, and can also be used for articles requiring water absorption such as ink jet recording paper.
［作用］ 本発明のシリカ質微粉末造粒品は嵩比重が０．２５〜
０．５で、かつ平均粒径が１００〜５００μｍの範囲に
あるために、シリカ質微粉末と比べて嵩容積が小さく取
扱いが容易となり、また無機，有機材料との混練時には
容易に解砕して分散性が良好のために混和材，添加材等
として利用できるものと推定される。[Operation] The silica fine powder granulated product of the present invention has a bulk specific gravity of 0.25 to 0.25.
Since it is 0.5 and the average particle size is in the range of 100 to 500 μm, it has a smaller bulk volume than the silica fine powder and is easy to handle, and is easily crushed when kneading with an inorganic or organic material. Because of its good dispersibility, it is presumed that it can be used as an admixture or additive.
［実施例］ 以下実施例に基づいて本発明をさらに説明する。[Examples] The present invention will be further described based on Examples below.
実施例１ 回転ドラム型造粒機に、シリカ質微粉末を供給と同時に
スプレーで加湿し造粒を行った。回転時間により、測定
しながら嵩比重を調整した。造粒品の嵩比重、平均粒径
及び水分含有量を表−１に示す。Example 1 Silica fine powder was supplied to a rotary drum type granulator and spray-moisturized at the same time to granulate. The bulk specific gravity was adjusted while measuring by the rotation time. Table 1 shows the bulk specific gravity, average particle size, and water content of the granulated product.
水粉体比５０％においてセメントの２割を造粒品で置換
し、７０℃で６ｈ及び７２ｈ反応させてアセトンにて水
和反応を停止させ、１０５℃で乾燥した試料のＣａ（Ｏ
Ｈ）２量をグリセリン−アルコール法により定量した。
造粒品の代わりにＴｉＯ２を用いた際に生成するＣａ
（ＯＨ）２に対する割合を求め反応率とした。表−１に
その結果を示す。20% of the cement was replaced with a granulated product at a water powder ratio of 50%, reacted at 70 ° C. for 6 h and 72 h, stopped the hydration reaction with acetone, and dried at 105 ° C.
H) 2 amount was quantified by the glycerin-alcohol method.
Ca generated when TiO 2 is used instead of the granulated product
The ratio to (OH) 2 was calculated and used as the reaction rate. The results are shown in Table-1.
さらに、表−２に示す配合において、モルタルの流動
性、強度発現性状におよぼす影響を検討したが、造粒を
することによる悪影響は見られなかった。なお、上述の
練り混ぜには、全てモルタルミキサーを使用した。Furthermore, in the formulations shown in Table-2, the effects on the fluidity and strength development properties of the mortar were examined, but no adverse effects due to granulation were observed. A mortar mixer was used for all the above kneading.
表−１および表−２からわかるように、本発明のシリカ
質微粉末造粒品は、従来より使用されている造粒してい
ないシリカ質微粉末と同等の性能が発揮され、嵩比重を
高めることによって、倉庫等スペースを減少でき、かつ
粉体混合等において、１バッチの量を増加させることが
できることが認められる。 As can be seen from Table-1 and Table-2, the siliceous fine powder granulated product of the present invention exhibits performance equivalent to that of the non-granulated siliceous fine powder that has been conventionally used, and has a bulk specific gravity of It is recognized that by increasing the amount, the space such as a warehouse can be reduced and the amount of one batch can be increased in powder mixing and the like.
［発明の効果］ 本発明の嵩比重が０．２〜０．２５のシリカ質微粉末の
造粒品からなり、その嵩比重が０．２５〜０．５で、か
つ平均粒径が１００〜５００μｍの範囲にあるシリカ質
微粉末造粒品を用いることにより、嵩容量を減少させコ
ンクリート製造プラントやプレミックス製品製造工場で
の取り扱いを容易にし、しかもポゾラン活性等をそこな
うことのないすぐれた効果をもたらすことができる。[Effect of the Invention] The present invention comprises a granulated product of siliceous fine powder having a bulk specific gravity of 0.2 to 0.25 according to the present invention, a bulk specific gravity of 0.25 to 0.5, and an average particle size of 100 to. By using the silica fine powder granulated product in the range of 500 μm, the excellent effect that the bulk capacity is reduced, the handling in the concrete manufacturing plant and the premix product manufacturing plant is facilitated, and the pozzolanic activity etc. is not damaged Can bring.
また、本発明のシリカ質微粉末造粒品はセラミックス等
の無機製品，ゴム，プラスチック等の有機製品の混和
材、充填材、添加材等として使用することができ、従来
のシリカ質微粉末と同等あるいはそれ以上の性能を発揮
すると共に取り扱いが容易なために作業性を向上せしめ
極めて有用なものである。Further, the siliceous fine powder granulated product of the present invention can be used as an admixture, filler, additive, etc. of inorganic products such as ceramics, organic products such as rubber and plastics, and It exhibits the same or higher performance and is easy to handle, thus improving workability and is extremely useful.
第１図は、本発明におけるエアーレーションを実施する
装置の一具体例を示す模式図である。 １：送気ポンプ、５：多孔板 ２：導管、６：容器 ３：ガス洗浄器、７：フィルター ４：導管、８：シリカ質微粉末FIG. 1 is a schematic view showing a specific example of an apparatus for carrying out aeration in the present invention. 1: Air pump, 5: Perforated plate 2: Conduit, 6: Container 3: Gas scrubber, 7: Filter 4: Conduit, 8: Silica fine powder
Claims (1)
末を造粒してなる造粒品からなり、その嵩比重が０．２
５〜０．５で、かつ平均粒径が１００〜５００μｍの範
囲にあることを特徴とするコンクリート混和材用シリカ
質微粉末造粒品。1. A granulated product obtained by granulating fine siliceous powder having a bulk specific gravity of 0.2 to 0.25, and having a bulk specific gravity of 0.2.
A silica fine powder granulated product for a concrete admixture, characterized by having an average particle size of 5 to 0.5 and a range of 100 to 500 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4412886A JPH0639343B2 (en) | 1986-03-03 | 1986-03-03 | Silica fine powder granulated product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4412886A JPH0639343B2 (en) | 1986-03-03 | 1986-03-03 | Silica fine powder granulated product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62202848A JPS62202848A (en) | 1987-09-07 |
| JPH0639343B2 true JPH0639343B2 (en) | 1994-05-25 |
Family
ID=12682976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4412886A Expired - Fee Related JPH0639343B2 (en) | 1986-03-03 | 1986-03-03 | Silica fine powder granulated product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0639343B2 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5247600A (en) * | 1975-10-14 | 1977-04-15 | Union Kasei Kk | Method to improve physical properties of silica flowers |
| NO761434L (en) * | 1976-04-27 | 1977-10-28 | Elkem Spigerverket As | PROCEDURES FOR INCREASING THE VOLUME WEIGHT OF SILICATE STEW |
| PH11878A (en) * | 1976-04-27 | 1978-08-11 | Elkem Spigerverket As | Method of compacting silica dust |
| JPS6126541A (en) * | 1984-07-16 | 1986-02-05 | 花王株式会社 | Concrete admixing agent |
-
1986
- 1986-03-03 JP JP4412886A patent/JPH0639343B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62202848A (en) | 1987-09-07 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |