JPS63183812A - Silica hume mixed concrete and manufacture thereof - Google Patents
Silica hume mixed concrete and manufacture thereofInfo
- Publication number
- JPS63183812A JPS63183812A JP1677687A JP1677687A JPS63183812A JP S63183812 A JPS63183812 A JP S63183812A JP 1677687 A JP1677687 A JP 1677687A JP 1677687 A JP1677687 A JP 1677687A JP S63183812 A JPS63183812 A JP S63183812A
- Authority
- JP
- Japan
- Prior art keywords
- cement
- concrete
- water
- sand
- silica fume
- 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
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims description 39
- 239000004567 concrete Substances 0.000 title claims description 30
- 239000000377 silicon dioxide Substances 0.000 title claims description 11
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 239000004568 cement Substances 0.000 claims description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000004576 sand Substances 0.000 claims description 17
- 229910021487 silica fume Inorganic materials 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 2
- 238000004898 kneading Methods 0.000 claims 1
- 238000003860 storage Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 239000011083 cement mortar Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
［産業上の利用分野Ｊ
本発明はシリカフュームを混入したコンクリート、特に
骨材に硬練りセメントを造穀したコンクリート及びその
製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application J] The present invention relates to concrete mixed with silica fume, particularly concrete prepared by milling hard cement as aggregate, and a method for producing the same.
Ｅ従来技術とその問題点１
一般に、高強度のコンクリートを造るには、水セメント
比を小さ《しなければならないが、このように水セメン
ト比を小さくすると、ワーカビリチーを保つためにはセ
メント量が過大になり、過度の温度上昇などの問題が生
じて、ヒビ割れが発生する恐れも大きくなる．さらに、
コンクリートの単価が高《なる等の問題もある．例えば
、スランプ１８ｃ−程度で４８０ｋｇ／ａｍ’の強度の
コンクリートでは、セメント量は４５０〜５ ０ ０
ｋｇ／輪コにも達し、これでは温度上昇が着しく、また
混線後のスランプダウンも大きく、施工上の大きな問題
が生じる。EPrior art and its problems 1 Generally, in order to make high-strength concrete, the water-cement ratio must be reduced, but when the water-cement ratio is reduced in this way, the amount of cement must be reduced in order to maintain workability. If it becomes too large, problems such as excessive temperature rise will occur, and the risk of cracking will increase. moreover,
There are also problems such as the high unit price of concrete. For example, in concrete with a slump of about 18c and a strength of 480 kg/am', the amount of cement is 450 to 500.
kg/wheeler, which causes a rapid rise in temperature and a large slump down after cross-contact, leading to major problems in construction.
〔発明の目的ｊ
本発明は、上記従来の問題点を解決するためになされた
もので、その目的とするところは、通常の水セメント比
すなりｅａｔのセメント量で従来のものより強度を大幅
に上げることができ、流動性が大きく、プリージングが
小さいシリカフニーム混入ダブルミキシングコンクリー
ト及びその製造方法を提供することにある。[Purpose of the invention j The present invention has been made to solve the above-mentioned conventional problems, and its purpose is to significantly increase the strength compared to the conventional water-cement with a cement amount equivalent to that of the conventional water-cement. It is an object of the present invention to provide a double-mixing concrete containing silica hneem, which can increase the temperature of the concrete, has high fluidity, and has low pleating, and a method for producing the same.
［発明の構成］
本発明のシリカフューム混入コンクリートは、砂等の細
骨材あるいはこれに砂利等の粗骨材を加えた骨材の周囲
に硬いセメントペーストによｒ）穀を形成するように混
練した、いわゆるダブルミキシングコンクリートにシリ
カフニームを混在せしめたことを特徴とするものであり
、また、その製造方法は、砂等の細骨材あるいはこれに
砂利等の粗骨材を加えた骨材並びに適量のセメント及び
水を一次混練して、該骨材の周囲に硬いセメントペース
トの穀を形成せしめ、続いて、これに残りのセメント及
び水並びにシリカ７ユームを混入して二次混練すること
を特徴とするものである。[Structure of the Invention] The silica fume-containing concrete of the present invention is produced by mixing fine aggregate such as sand or coarse aggregate such as gravel with hard cement paste around the fine aggregate such as sand to form grains. It is characterized by mixing silica hneem into the so-called double-mixed concrete, and its production method is based on fine aggregate such as sand or aggregate with coarse aggregate such as gravel added, and an appropriate amount of aggregate. of cement and water are firstly kneaded to form a hard cement paste grain around the aggregate, and then the remaining cement, water and 7 um of silica are mixed therein and secondarily kneaded. That is.
［実施例］
以下、本発明の一実施例について図面を参照しながら説
明する。[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.
第１図において、１はセメント貯蔵槽、２は砂貯蔵槽で
あって、それぞれセメン）Ｃお上り砂Ｓが貯蔵されてい
る。セメントＣは、−次セメント計１：ｉ３により後述
する造穀に必要な量の一次セメン）Ｃ＋が計量され、ま
た砂は、砂計量器４により最終の砂セメント比（Ｓ／Ｃ
）になるように計量されて、それぞれ−次ミキサ−５に
投入される。In FIG. 1, 1 is a cement storage tank, and 2 is a sand storage tank, in which cement C and sand S are stored. For cement C, the amount of primary cement (C+) required for grain making (to be described later) is measured using a -order cement meter 1:i3, and for sand, the final sand-cement ratio (S/C) is measured using a sand measuring device 4.
) and put into the mixer 5 respectively.
さらに、上記−次ミキサ−５には・、水タンク６に貯水
されている水が一次水計量器７により適当な一次水セメ
ント比（Ｗ、／Ｃ）となるように計量されて給水される
。Furthermore, the water stored in the water tank 6 is metered by a primary water meter 7 so as to have an appropriate primary water-cement ratio (W, /C) and then supplied to the secondary mixer 5. .
これらの砂・−次セメント・−大水は、上記−次ミキサ
−５により一次混練される。この際、−次セメントと一
次水により硬いセメントペーストが造られ、この硬いセ
メントペーストが、第２図（Ａ＞に示すように、砂Ｓの
周囲を被覆して殻８を形成する。These sand, secondary cement, and large water are primarily kneaded by the primary mixer 5. At this time, a hard cement paste is made from the primary cement and the primary water, and this hard cement paste covers the periphery of the sand S to form a shell 8, as shown in FIG. 2 (A>).
以上のようにして造穀されたセメントモルタルは下段の
二次ミキサー９に投入される。The cement mortar milled as described above is put into the secondary mixer 9 in the lower stage.
該二次ミキサー９には、砂利貯′ｉ＆Ｐａ１０からの砂
利Ｇが砂利計量器１１により適宜計ｔされて混入される
と共に、最終の砂セメント比（Ｓ／Ｃ）となるように、
のこりの二次セメン）Ｃｚ（ｃ−ｃ、）が二次砂計量器
１２により計量され、また最終の水セメント比（Ｗ／Ｃ
）となるように、残りの二次水Ｗ２（Ｗ−Ｗ＋）が二次
水計量器１３により計ｊｌされて給水される。該二次水
Ｗ２には途中シリカ７ユーム１４が混入される。このシ
リカ７ユーム１４は、例えば半導体の製造過程で産出さ
れる副産物のように、粒径が約０．１μの球形を成して
おり、従来から廃材として廃棄されていたものが、本発
明により有効利用されるようになった。Gravel G from the gravel storage 'i & Pa 10 is mixed into the secondary mixer 9 after being measured appropriately by a gravel meter 11, and the mixture is mixed so as to achieve the final sand-cement ratio (S/C).
The remaining secondary cement) Cz (c-c,) is measured by the secondary sand measuring device 12, and the final water-cement ratio (W/C
) The remaining secondary water W2 (W-W+) is measured by the secondary water meter 13 and supplied. Silica 7 Yum 14 is mixed into the secondary water W2. This silica 7-yum 14 has a spherical shape with a particle size of about 0.1μ, like a by-product produced in the manufacturing process of semiconductors. It has started to be used effectively.
以上のよ）に二次ミキサー９に投入された造穀セメント
モルタルと砂利Ｇと二次セメントと二次水Ｗ２とシリカ
７ユーム１４とは、二次ミキサー９により二次混練され
て、第２図（Ｂ）に示すような性状のいわゆる造穀コン
クリートができあがる。The grain cement mortar, gravel G, secondary cement, secondary water W2, and silica 7 yum 14 that were put into the secondary mixer 9 in the above step are mixed by the secondary mixer 9, and the So-called grain concrete having properties as shown in Figure (B) is completed.
尚、１５は硬化促進剤や遅延Ｍなどの混和剤槽、１６は
その混和剤計量器である。 上記実施例では、−次ミキ
サ−５により砂Ｓ等のいわゆる細骨材について造穀処理
したが、本発明はこれに限定するものではなく、−次ミ
キサ−５の混線能力を高めて砂利Ｇ等の粗骨材について
も遺穀混練してもよい。In addition, 15 is a tank for admixtures such as curing accelerator and retarder M, and 16 is an admixture measuring device. In the above embodiment, so-called fine aggregate such as sand S was subjected to grain processing using the secondary mixer 5. However, the present invention is not limited to this, and the mixing ability of the secondary mixer 5 is increased to Coarse aggregates such as grains may also be kneaded.
次に、本発明のシリカフューム混入コンクリートと従来
のコンクリートとの比較を表にして示す。Next, a comparison between the silica fume-containing concrete of the present invention and conventional concrete is shown in a table.
上記表により本発明のシリカフューム混入コンクリート
は、水セメント比が大きく（セメント量）が少なくても
十分な強度を発揮し得ることが解る。From the above table, it can be seen that the silica fume-containing concrete of the present invention can exhibit sufficient strength even if the water-cement ratio (cement amount) is large and small.
また、第３図は本発明のシリカ７ユーム混入コンクリー
トと従来のコンクリートとの温度上昇を比較したグラフ
であり、本発明のシリカ７ユーム混入コンクリートの温
度上昇が低いことが確認された。Furthermore, FIG. 3 is a graph comparing the temperature rise of the concrete containing 7 um silica of the present invention and conventional concrete, and it was confirmed that the temperature rise of the concrete containing 7 um silica of the present invention was low.
［発明の効果１
（１）従来の水セメント比、すなわち従来のセメント量
で、コンクリート強度を従来の１．８倍程度にまで＾め
ることができる。[Effect of the invention 1 (1) With the conventional water-cement ratio, that is, the conventional amount of cement, the strength of concrete can be increased to about 1.8 times that of the conventional one.
（２）セメント量が過大でないため、通常の施工交優れ
た品質のコンクリートが施工できる。(2) Since the amount of cement is not excessive, it is possible to construct concrete of excellent quality compared to normal construction.
（３）プリージングが少な（、材料分離が極めて小さい
ため、高流動化コンクリートを造ることができ、極めて
複雑な断面の＾スランプ施工に適する。(3) There is little pleating (material separation is extremely small, so highly fluidized concrete can be made, making it suitable for slump construction with extremely complex cross sections.
（４）温度上昇を押さえることができるので、大断面の
コンクリート施工が可能である。(4) Since temperature rise can be suppressed, large cross-section concrete construction is possible.
（５）流動化しても分離しないため、水中コンクリート
を能率よく施工できる。(5) Since it does not separate even when fluidized, underwater concrete can be constructed efficiently.
第１図は本発明方法を実施するコンクリート製造プラン
トの概略図、ｆ５２図（Ａ）は？Ｌ穀された二次セメン
トモルタルの概念図、第２図（Ｂ）はシリカフューム混
入ダブルミキシングコンクリートの概念図、第３図は本
発明のシリカフューム混入コンクリートと従来のコンク
リートとの温度上昇を比較したグツ７である。
１・・・セメント貯蔵槽、２・・・砂貯蔵槽、３・・・
セメント計量器、４・・・砂計量器、５・・・−次ミキ
サ−１６・・・水タンク、７・・・−大水計量器、８・
・・穀、９・・・二次ミキサー、１０・・・砂利貯蔵槽
、１１・・・砂利計量器、１２・・・二次砂計量器、１
３・・・二次水計量器、１４・・・ンリカ７エーム、１
５・・・混和剤槽、１６・・・混和剤計量器、Ｃ・・・
セメント、Ｃ５・・・−次セメント、Ｃ２・・・二次セ
メント、Ｇ・・・砂利、Ｓ・・・砂、Ｗ・・・水、Ｗ、
・・・−大水、Ｗ２・・・二次水。Figure 1 is a schematic diagram of a concrete manufacturing plant that implements the method of the present invention, and Figure f52 (A) is? A conceptual diagram of L-grained secondary cement mortar, Figure 2 (B) is a conceptual diagram of double mixing concrete mixed with silica fume, and Figure 3 is a comparison of temperature rise between concrete mixed with silica fume of the present invention and conventional concrete. It is 7. 1... Cement storage tank, 2... Sand storage tank, 3...
Cement measuring device, 4...Sand measuring device, 5...-Next mixer-16...Water tank, 7...-Large water measuring device, 8.
...Grain, 9...Secondary mixer, 10...Gravel storage tank, 11...Gravel weigher, 12...Secondary sand weigher, 1
3...Secondary water meter, 14...Nrika 7 Aim, 1
5...Admixture tank, 16...Admixture measuring device, C...
Cement, C5...-secondary cement, C2...secondary cement, G...gravel, S...sand, W...water, W,
...-Big water, W2...Secondary water.
Claims (4)
を混在せしめたことを特徴とするシリカフューム混入コ
ンクリート。(1) Silica fume-mixed concrete characterized by mixing silica fume into double mixing concrete.
、該骨材の周囲に硬いセメントペーストの穀を形成せし
め、続いて、これに残りのセメント及び水並びにシリカ
フュームを混入して二次混練して成ることを特徴とする
シリカフューム混入コンクリートの製造方法。(2) Aggregates and appropriate amounts of cement and water are first kneaded to form a hard cement paste grain around the aggregates, and then the remaining cement, water and silica fume are mixed in to form a second mixture. A method for producing silica fume-mixed concrete, characterized in that it is made by kneading.
前記特許請求の範囲第２項に記載のシリカフューム混入
コンクリートの製造方法。(3) The method for producing silica fume-containing concrete according to claim 2, wherein the aggregate is a fine aggregate such as sand.
あることを特徴とする前記特許請求の範囲第２項に記載
のシリカフューム混入コンクリートの製造方法。(4) The method for producing silica fume-containing concrete according to claim 2, wherein the aggregate is a fine aggregate such as sand or a coarse aggregate such as gravel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62016776A JPH07115347B2 (en) | 1987-01-27 | 1987-01-27 | Method for producing concrete containing silica fume |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62016776A JPH07115347B2 (en) | 1987-01-27 | 1987-01-27 | Method for producing concrete containing silica fume |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63183812A true JPS63183812A (en) | 1988-07-29 |
| JPH07115347B2 JPH07115347B2 (en) | 1995-12-13 |
Family
ID=11925602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62016776A Expired - Lifetime JPH07115347B2 (en) | 1987-01-27 | 1987-01-27 | Method for producing concrete containing silica fume |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07115347B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002248615A (en) * | 2001-02-23 | 2002-09-03 | Yoshitaka Ikeda | Method for manufacture of concrete wherein ratio of entrained air is raised |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61199910A (en) * | 1985-03-01 | 1986-09-04 | 大平洋機工株式会社 | Manufacture of concrete |
-
1987
- 1987-01-27 JP JP62016776A patent/JPH07115347B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61199910A (en) * | 1985-03-01 | 1986-09-04 | 大平洋機工株式会社 | Manufacture of concrete |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002248615A (en) * | 2001-02-23 | 2002-09-03 | Yoshitaka Ikeda | Method for manufacture of concrete wherein ratio of entrained air is raised |
| JP4723101B2 (en) * | 2001-02-23 | 2011-07-13 | 良隆 池田 | Concrete production method with increased entrained air ratio |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07115347B2 (en) | 1995-12-13 |
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