JPH0471021B2 - - Google Patents
Info
- Publication number
- JPH0471021B2 JPH0471021B2 JP4756185A JP4756185A JPH0471021B2 JP H0471021 B2 JPH0471021 B2 JP H0471021B2 JP 4756185 A JP4756185 A JP 4756185A JP 4756185 A JP4756185 A JP 4756185A JP H0471021 B2 JPH0471021 B2 JP H0471021B2
- Authority
- JP
- Japan
- Prior art keywords
- air
- siliceous
- fine powder
- powder
- fine
- 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 - Lifetime
Links
- 239000000843 powder Substances 0.000 claims description 23
- 239000004568 cement Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 15
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000000377 silicon dioxide Substances 0.000 description 6
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- 206010067482 No adverse event Diseases 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
-
- 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)
Description
〔産業上の利用分野〕
本発明は、ポゾラン活性を損うことなく軟集さ
せた、嵩容積が小さく取り扱いが容易なセメント
混和用シリカ質微粉末に関する。
〔従来技術〕
従来、シリカ質微粉末をコンクリートやプレミ
ツ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
プレミツ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
要なこと等の問題点があつた。また、一般的な造
粒方法として流動層造粒法やスプレードライヤー
による方法等が知られているが、これらの方法に
より嵩容積を減少させたシリカ質微粉末は、その
凝集力が大き過ぎることにより通常の混練におい
てはボゾラン活性が著しく低下すると云う問題点
もあつた。
〔発明が解決しようとする問題点〕
本発明者は以上の問題点を解消するため種々検
討を加えた結果、湿潤空気によりシリカ質微粉末
をエアーレーシヨンすることにより嵩容積が減少
し取り扱いが容易で、混練時には容易に分散する
いわゆる軟集されたシリカ質微粉末が製造できる
と云う知見を得て本発明を完成するに到つた。
〔問題点を解決するための手段〕
即ち、本発明は湿潤空気でシリカ質微粉末をエ
アーレーシヨンし軟集させたセメント混和用シリ
カ質微粉末である。
以下本発明を詳細に説明する。
シリカ質微粉末としては、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があげ
られ、平均粒径0.1〜0.2μ程度の超微粉である。
ここでエアーレーシヨンとは、空気で微粉末８を
吹き上げる操作であり、図面の多孔板５を通じ容
器６内で実施される。
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。ガス洗浄器の常温が好ましく、加温すること
も可能である。
この湿潤空気でシリカ質微粉末をエアーレーシ
ヨンすることにより、粒状の軟集したシリカ質微
粉末（以下軟集シリカという）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、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。
なお、本方法はセラミツク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、多量に微粉末を取
り扱う場合において、そのメリツトが発揮され
る。
〔実施例〕
以下実施例に基づいて本発明をさらに説明す
る。
図面に示す装置を用いて、シリカ質微粉末のエ
アーレーシヨンを行なつた。
図面中１は送気ポンプであり、導管２により水
の満たされたガス洗浄器３に導かれ、乾燥空気は
湿潤空気に変わる。この湿潤空気を穴の開いた板
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、エアーレーシヨンを実
施する。なお、７は布製のフイルターである。
図面は本発明の一具体例であつて本発明のエア
レーシヨンはこの方法に限られるものではない。
この装置を用いてエアーレーシヨンを４時間実
施した所、粒状のものとなり嵩容積は表−１のご
とくなつた。また、水セメント比50％において、
セメントの２割を軟集シリカで置換し70℃で6h、
24h、72h反応させ遊離Ca（OH）2量をグリセリン
−アルコール法により定量し、軟集シリカの代わ
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−２が、その結果
であるが、ポゾラン活性は変化していない。さら
に、表−３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つた。
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。
[Industrial Application Field] The present invention relates to a fine siliceous powder for mixing in cement, which is soft aggregated without impairing pozzolanic activity, has a small bulk volume, and is easy to handle. [Prior Art] Conventionally, when fine siliceous powder is used for concrete or premix products, it is difficult to handle it during manufacturing at a concrete manufacturing plant or premix manufacturing plant due to the bulk of the siliceous fine powder. There were problems such as the need for a vast area for storage. In addition, fluidized bed granulation and methods using spray dryers are known as general granulation methods, but the siliceous fine powder whose bulk volume is reduced by these methods has an excessively large cohesive force. There was also the problem that the bozolan activity was significantly reduced during normal kneading. [Problems to be Solved by the Invention] As a result of various studies to solve the above-mentioned problems, the present inventor has found that by aerating the siliceous fine powder with moist air, the bulk volume is reduced and handling becomes easier. The present invention was completed based on the knowledge that it is possible to easily produce a so-called soft agglomerated siliceous fine powder that is easily dispersed during kneading. [Means for Solving the Problems] That is, the present invention provides a fine siliceous powder for mixing with cement, which is made soft by air rationing with moist air. The present invention will be explained in detail below. Examples of the siliceous fine powder include siliceous dust that is produced as a by-product during the production of silicon or silicon-containing alloys, and is an ultrafine powder with an average particle size of about 0.1 to 0.2 μm.
Here, air ration is an operation of blowing up the fine powder 8 with air, and is carried out in the container 6 through the perforated plate 5 shown in the drawing. Humid air is produced by filling water in a gas scrubber 3 and feeding air with the air pump 1. The room temperature of the gas scrubber is preferable, and it is also possible to heat the gas scrubber. By air-rationing the siliceous fine powder with this moist air, granular soft agglomerated siliceous fine powder (hereinafter referred to as soft agglomerated silica) can be produced. When this soft aggregated silica is used in the production of concrete, it is completely dispersed and effective, and its bulk volume is 50 to 60% that of a fine powder. Note that this method can also be used for handling other fine powders that are ceramic raw materials;
Its advantages are demonstrated when handling large amounts of fine powder, such as when used in civil engineering structures. [Examples] The present invention will be further described below based on Examples. Air ration of fine siliceous powder was carried out using the apparatus shown in the drawings. In the drawing, reference numeral 1 denotes an air pump, which is guided through a conduit 2 to a gas washer 3 filled with water, and the dry air is changed into humid air. This humid air is passed through a perforated plate 5 and blown into a container 6 filled with fine siliceous powder to perform air ration. Note that 7 is a filter made of cloth. The drawing is a specific example of the present invention, and the aeration method of the present invention is not limited to this method. When air ration was carried out for 4 hours using this device, the material became granular and the bulk volume was as shown in Table 1. In addition, at a water-cement ratio of 50%,
Replace 20% of the cement with soft silica and heat at 70℃ for 6 hours.
The reaction was carried out for 24 hours and 72 hours, and the amount of free Ca(OH) 2 was determined by the glycerin-alcohol method, and the ratio to Ca(OH) 2 generated when TiO 2 was used in place of soft silica was determined and used as the reaction rate. Table 2 shows the results, and the pozzolan activity did not change. Furthermore, we investigated the effects on mortar fluidity and strength development properties in the formulations shown in Table 3.
No adverse effects due to granulation were observed.
Note that a mortar mixer was used for all of the above-mentioned kneading and mixing.
【表】
シリカ質微粉末：フエロシリコン製造時副生
シリカダスト(シリカヒユーム、日本重化
製)
[Table] Siliceous fine powder: Silica dust by-product during ferrosilicon production (Silica Hue, manufactured by Nippon Heavy Industries)
【表】【table】
【表】
セメント：電気化学工業(株)製普通ポルト
ランドセメント
砂：硅砂5号
高性能減水剤：電気化学工業(株)商品名〓
FT−500〓(有効成分換算で添加)
〔発明の効果〕
湿潤空気を用いシリカ質微粉末をエアーレーシ
ヨンすることにより、嵩容積を減少させコンクリ
ート製造プラトンやプレミツ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を損
うことのない軟集したシリカ質微粉末の提供が可
能である。[Table] Cement: Ordinary Portland cement manufactured by Denki Kagaku Kogyo Co., Ltd.
Sand: Silica sand No. 5
High performance water reducing agent: Denki Kagaku Kogyo Co., Ltd. product name
FT-500〓(added in terms of active ingredient)
[Effects of the invention] By aerating the siliceous fine powder using humid air, the bulk volume is reduced, making it easier to handle in concrete manufacturing plants and premix product manufacturing plants, and without impairing pozzolanic activity. It is possible to provide soft agglomerated siliceous fine powder.
図面は、本発明のエアレーシヨンを実施する一
具体例の模式図である。
符号、１：送気ポンプ、２：導管、３：ガス洗
浄器、４：導管、５：多孔板、６：容器、７：フ
イルター、８：シリカ質微粉末。
The drawing is a schematic diagram of a specific example of carrying out the aeration of the present invention. Code, 1: Air pump, 2: Conduit, 3: Gas washer, 4: Conduit, 5: Perforated plate, 6: Container, 7: Filter, 8: Fine siliceous powder.
Claims (1)
ンし、軟集させたセメント混和用シリカ質微粉末1. Fine siliceous powder for mixing with cement, which is obtained by air rationing fine siliceous powder with moist air and agglomerating it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60047561A JPS61209939A (en) | 1985-03-12 | 1985-03-12 | Silica fine powder for cement admixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60047561A JPS61209939A (en) | 1985-03-12 | 1985-03-12 | Silica fine powder for cement admixture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61209939A JPS61209939A (en) | 1986-09-18 |
| JPH0471021B2 true JPH0471021B2 (en) | 1992-11-12 |
Family
ID=12778617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60047561A Granted JPS61209939A (en) | 1985-03-12 | 1985-03-12 | Silica fine powder for cement admixture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61209939A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63315209A (en) * | 1987-06-18 | 1988-12-22 | Shimizu Constr Co Ltd | Manufacture of kneaded matter for waterproof concrete |
| TR199902849T2 (en) * | 1997-05-26 | 2000-06-21 | Sobolev Konstantin | Production of complex additives and cement-based materials. |
-
1985
- 1985-03-12 JP JP60047561A patent/JPS61209939A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61209939A (en) | 1986-09-18 |
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