JPS627654A - Manufacture of centrifugally formed concrete product - Google Patents
Manufacture of centrifugally formed concrete productInfo
- Publication number
- JPS627654A JPS627654A JP14449285A JP14449285A JPS627654A JP S627654 A JPS627654 A JP S627654A JP 14449285 A JP14449285 A JP 14449285A JP 14449285 A JP14449285 A JP 14449285A JP S627654 A JPS627654 A JP S627654A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- water
- concrete
- silica
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 239000000843 powder Substances 0.000 claims description 21
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 19
- 239000011707 mineral Substances 0.000 claims description 19
- 239000000377 silicon dioxide Substances 0.000 claims description 18
- 239000004568 cement Substances 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 12
- 239000000440 bentonite Substances 0.000 claims description 10
- 229910000278 bentonite Inorganic materials 0.000 claims description 10
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 10
- 239000011398 Portland cement Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 description 26
- 230000000052 comparative effect Effects 0.000 description 21
- 239000000047 product Substances 0.000 description 20
- 239000010802 sludge Substances 0.000 description 18
- 230000000694 effects Effects 0.000 description 7
- 238000004898 kneading Methods 0.000 description 6
- 238000000465 moulding Methods 0.000 description 6
- 238000001723 curing Methods 0.000 description 5
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 239000010881 fly ash Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 229910021487 silica fume Inorganic materials 0.000 description 4
- 238000009472 formulation Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- QIVUCLWGARAQIO-OLIXTKCUSA-N (3s)-n-[(3s,5s,6r)-6-methyl-2-oxo-1-(2,2,2-trifluoroethyl)-5-(2,3,6-trifluorophenyl)piperidin-3-yl]-2-oxospiro[1h-pyrrolo[2,3-b]pyridine-3,6'-5,7-dihydrocyclopenta[b]pyridine]-3'-carboxamide Chemical compound C1([C@H]2[C@H](N(C(=O)[C@@H](NC(=O)C=3C=C4C[C@]5(CC4=NC=3)C3=CC=CN=C3NC5=O)C2)CC(F)(F)F)C)=C(F)C=CC(F)=C1F QIVUCLWGARAQIO-OLIXTKCUSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- XULSCZPZVQIMFM-IPZQJPLYSA-N odevixibat Chemical compound C12=CC(SC)=C(OCC(=O)N[C@@H](C(=O)N[C@@H](CC)C(O)=O)C=3C=CC(O)=CC=3)C=C2S(=O)(=O)NC(CCCC)(CCCC)CN1C1=CC=CC=C1 XULSCZPZVQIMFM-IPZQJPLYSA-N 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 240000005343 Azadirachta indica Species 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000013500 Melia azadirachta Nutrition 0.000 description 1
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000008030 superplasticizer Substances 0.000 description 1
Landscapes
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
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〉
本発明は、遠心力成形コンクリート製品の □製造
方法に関し、更に評言すると遠心力成形時に発生するス
ラッジを皆無にするように工夫したものである。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a manufacturing method for centrifugally formed concrete products, and more specifically, it is devised to completely eliminate sludge generated during centrifugally forming. .
〈従来の技術〉
従来、コンクリートボールやコンクリートパイル等の中
空コンクリート製品を製造する際に行われる遠心力成形
法は、混練したコンクリートを円筒状型枠内にポンプ注
入し、とれを高速回転させて遠心力によシコンクリート
を締め固め、混練水の一部を絞シ取ることＫより低水セ
メント比の密実なコンクリート製品ｔ−得る方法である
。しかし、混練水の一部を絞シ・取る締め固め時には、
絞少水のなかに約２０〜４０ｆｆｉｆ％のセメントなら
びに微細骨材が混入したスラッジが発生していた。<Conventional technology> Conventionally, the centrifugal force forming method used to manufacture hollow concrete products such as concrete balls and concrete piles involves pumping mixed concrete into a cylindrical form and rotating the mold at high speed. This is a method of compacting concrete by centrifugal force and squeezing out a portion of the mixing water to obtain a dense concrete product with a lower water-to-cement ratio. However, when compacting by squeezing out some of the kneading water,
Sludge containing about 20 to 40 ffif% of cement and fine aggregate was generated in the squeezed water.
このスラッジは強アルカリ性であるため、製造工場では
その処理に多くの手間と費用ｆＩ：要していた。Since this sludge is strongly alkaline, it requires a lot of effort and cost to process at the manufacturing plant.
そこで、従来よシこのスランプの発生ｉを極力減少させ
る技術が開発されている。例えば、■特開昭５９−８１
１１６号公報および特開昭５９−８１１１７号公報に開
示されているように、高性能減水剤ならびに高強度混和
材を配合してできるだけコンクリートに使用する水量を
減じ、遠心力と回転時間を抑えて遠心力成形を行って成
形時に発生するスランプ量を減じる方法、■特公昭５９
−３８０８５号公報に開示されているように、乾式混合
したコンクリート原料を回転型枠内で中空柱状を形成さ
せつつ水を添加することによシスラツソ発生の無い遠心
力成形を行う方法、あるいは■特ｆ１６０−１５７９１
号公報に開示されているように、コンクリートの投入を
２段階に分け、第１段階で全設定注入量の４０〜８０チ
を注入して高速回転で締め固め、しかる後残余のコンク
リートを型枠に注入して再び高速回転で遠心力成形を行
うことによシスラツソの発生ｆｔ全減少させる方法など
がある。Therefore, techniques have been developed to reduce the occurrence of slump as much as possible compared to conventional techniques. For example, ■ Japanese Patent Publication No. 59-81
As disclosed in Japanese Patent Application No. 116 and Japanese Patent Application Laid-Open No. 59-81117, high-performance water reducing agents and high-strength admixtures are mixed to reduce the amount of water used in concrete as much as possible, and to suppress centrifugal force and rotation time. A method of reducing the amount of slump that occurs during molding by performing centrifugal force molding, ■Special Publication 1987
As disclosed in Publication No. 38085, there is a method of performing centrifugal force forming without the occurrence of cystolats by forming hollow columnar shapes of dry mixed concrete raw materials in a rotary formwork and adding water, or f160-15791
As disclosed in the publication, the pouring of concrete is divided into two stages, and in the first stage, the total injection amount of 40 to 80 g is poured and compacted with high speed rotation, and then the remaining concrete is poured into the formwork. There is a method of completely reducing the occurrence of cyslase by injecting it into the mold and performing centrifugal force molding at high speed rotation again.
〈発明が解決しようとする問題点〉
しかし、上記■の方法では、低水セメント比コンクリー
ト特有の問題点、即ちコンクリートのスランプの経時変
化の激しいことによシコンクリートポンプの閉塞などの
トラブルを起し易いという問題がある。また■の方法で
は、乾式混合原料に水を後添加する際に水ｉ調節が難か
しいという問題がある。さらに■の方法では２段階投入
によってできる層間の均−性等に問題がある。<Problems to be Solved by the Invention> However, method (2) above does not solve the problem peculiar to low water-cement ratio concrete, that is, problems such as clogging of the concrete pump due to rapid changes in concrete slump over time. The problem is that it is easy to do. In addition, the method (2) has a problem in that it is difficult to adjust the water i when adding water later to the dry mixed raw materials. Furthermore, the method (2) has problems with the uniformity of the layers formed by the two-step addition.
よって、本発明は上記問題点に鑑み、従来の一般の遠心
力成形法と同様の工程によシ従来と同等以上の性能を有
する製品が製造でき、しかもスラッジの発生がない遠心
力成形コンクリート製品の製造方法を提供することを目
的とする。Therefore, in view of the above-mentioned problems, the present invention provides a centrifugally formed concrete product that can be manufactured using the same process as the conventional general centrifugal forming method, has performance equivalent to or better than conventional methods, and does not generate sludge. The purpose is to provide a manufacturing method for.
く問題点を解決するための手段〉
本発明者らは、前記目的′ｔ−達成するために通常の遠
心力成形コンクリート製品の製造工程でスラッジの発生
のない成形方法について極々検討を重ねた結果、コンク
リート原料としてシリカフニームおよび比表面積が６．
０００〜９．０００ ｃｒｌ／ｇの鉱物質微粉末あるい
はさらにベントナイトを特定量混用し、かつコンクリー
トの練）混ぜ水を水セメント比で０．４０以下にするこ
とＫよシ、通常の遠心成形工程によシスラツソの発生が
なく、かつ従来の製造方法による遠心成形コンクリート
製品と同等もしくはそれ以上の強度を有する製品が得ら
れることを知見し本発明を完成させた。Means for Solving the Problems In order to achieve the above-mentioned objective 't-, the present inventors have made extensive studies on a forming method that does not generate sludge in the manufacturing process of normal centrifugally formed concrete products. , using silica hneem as a raw material for concrete and having a specific surface area of 6.
000 to 9.000 crl/g mineral fine powder or a specific amount of bentonite is mixed, and the water-cement ratio of the mixing water for concrete is 0.40 or less, and the normal centrifugal molding process. The present invention was completed based on the finding that it is possible to obtain a product that does not cause cracking and has strength equal to or greater than that of centrifugally formed concrete products manufactured by conventional manufacturing methods.
かかる本発明の構成線、ポルトランドセメント１００重
量部に対し、 −′−９
、シリカフニーム２〜１０・
重量部と、比表面積６，０００〜９，０００ａＩ／ｙｏ
鉱物質微粉末５〜２（１：ｆｔ都とを両者の合計量が１
５重量部以上になるように骨材の一部として使用し、水
セメント比０，４０以下の混練水を配合して遠心成形す
ることを特徴とし、または、ポルトランドセメント１０
０重蓋部。The constituent line of the present invention is -'-9, 2 to 10 parts by weight of silica neem, and a specific surface area of 6,000 to 9,000 aI/yo per 100 parts by weight of Portland cement.
Mineral fine powder 5 to 2 (1: ft) and the total amount of both is 1
It is characterized in that it is used as part of the aggregate in an amount of 5 parts by weight or more, mixed with kneading water with a water-cement ratio of 0.40 or less and centrifugally molded, or Portland cement 10
0 double lid.
に対しシリカフユーム２〜ＩＯ重量部と、比表面積６，
０００〜９，０００ｆｆｌ／ｙの鉱物質微粉末４．５〜
１５］ｉｉ部と、ベントナイト０．５〜５重量部とを全
合計量が１５重量部以上になるように骨材と一部として
使用し、水セメント比０．４０以下の混練水を配合して
遠心成形することを特徴とする。silica fuyum 2 to IO parts by weight and specific surface area 6,
000~9,000ffl/y mineral fine powder 4.5~
15] Part II and 0.5 to 5 parts by weight of bentonite are used as part of the aggregate so that the total amount is 15 parts by weight or more, and mixing water with a water-cement ratio of 0.40 or less is mixed. It is characterized by centrifugal molding.
以下、本発明の構成を詳しく説明する。Hereinafter, the configuration of the present invention will be explained in detail.
本発明に使用するポルトランドセメントは、特に限定さ
れず、普通、早強あるいは超早強ポルトランドセメント
のいずれでもよい。The Portland cement used in the present invention is not particularly limited, and may be any of ordinary, early-strength or ultra-early-strength Portland cement.
また、本発明に使用するシリカフユームとしては、例え
ばシリコンや７エロシリコン等の製造時に副生されるシ
リコンダス）ｆ用いることかできるが、その比表面積が
１３０，０００〜２５０，０００ ｃｍ２／ｇ 、好ま
しくは１８０，０００〜２３０，０００ａｔｌ／ｌのも
のが用いられる。ここで、比表面積が１３０，０００ｆ
ｆｌ、り未満では、遠心成形時におけ ：、る分
離水の保水能力が著しく低下してスラツノの発生防止に
効果が小さく、２５０，０００１．９を超えると、コン
クリートの混練水を著しく増大させ、その結果スラッジ
の発生とともに強度低下を招く。In addition, as the silica fume used in the present invention, for example, silicon dust, which is produced as a by-product during the production of silicon and 7-erosilicon, can be used, but the silica fume has a specific surface area of 130,000 to 250,000 cm2/g, Preferably, one having a concentration of 180,000 to 230,000 atl/l is used. Here, the specific surface area is 130,000f
If it is less than 250,0001.9 fl, the water holding capacity of the separated water during centrifugal molding will be significantly reduced and the effect on preventing the generation of sludge will be small; if it exceeds 250,0001.9, the mixing water of concrete will be significantly increased. As a result, sludge is generated and strength is reduced.
鉱物質微粉末としては、フライアッシュ、天然岩石、ケ
イ砂、セメント、炭酸カルシウム、石灰粉末等を粉砕も
しくは分級したもので、比表面積が６，０００〜９，０
００ ｃｉ７ｇ 、好ましくは７，０００〜８，５００
ｃｍ２／ｇのもｏｒ用いる。Fine mineral powders include crushed or classified fly ash, natural rocks, silica sand, cement, calcium carbonate, lime powder, etc., and have a specific surface area of 6,000 to 9,000.
00 ci7g, preferably 7,000-8,500
cm2/g is also used.
ここで、比表面積が６，０００ｃｒｌ／、９以下では、
上記シリカフユームと混用した場合のスラッジ発生防止
効果が小さく、９，０００ｄ／ｐｋ超えると混練水量が
増えてスラッジ発生防止効果が小さくなる。Here, when the specific surface area is 6,000 crl/9 or less,
The effect of preventing sludge generation when mixed with the above-mentioned silica fume is small, and if it exceeds 9,000 d/pk, the amount of kneading water increases and the effect of preventing sludge generation becomes small.
また、ベントナイトは、ケイ酸アルミニウム系の粘土鉱
物であシ、従来セメントの水利硬化を阻害する物質とし
て知られているものであるが、本発明においては他の成
分の作用と相俟ってスラッジの発生をよシよく防止する
と共に強度の増大をもたらす効果を奏する。In addition, bentonite is an aluminum silicate clay mineral, and is known as a substance that inhibits the water hardening of cement. This has the effect of effectively preventing the occurrence of oxidation and increasing strength.
これらシリカ質微粉末および鉱物質微粉末、あるいはさ
らにベントナイトは、上記範囲内で骨材の一部として用
いられる。ここで上記範囲から外れる場合には、後述の
比較例で示すようにスラッジの発生量が著しく増加し、
さらに製品内周面に低強度層が厚く形成されるので製品
強度が低下する。また、これらシは、従来の遠心成形コ
ンクリートに用いられているものでよく、特に限定され
ない。These fine siliceous powders and fine mineral powders, or even bentonite, are used as part of the aggregate within the above range. If the above range is exceeded, the amount of sludge generated will increase significantly, as shown in the comparative example below.
Furthermore, since a thick low-strength layer is formed on the inner peripheral surface of the product, the strength of the product is reduced. Further, these materials may be those used in conventional centrifugally formed concrete, and are not particularly limited.
また、本発明方法における水セメント比は０．４０以下
にする必要がある。これは、水セメント比が０．４０
Ｔｈ超えてしまうと、上述のシリカフニームおよび鉱物
質微粉末を混用してもスラッジの発生を防止できず、か
つ製品の強度が著しく低下するからである。Further, the water-cement ratio in the method of the present invention needs to be 0.40 or less. This means that the water-cement ratio is 0.40.
This is because if Th is exceeded, the generation of sludge cannot be prevented even if the above-mentioned silica hneem and mineral fine powder are mixed, and the strength of the product will be significantly reduced.
本発明方法においては、水セメント比を０．４０以下に
してポンプ圧送可能なワーカピリチーを有するコンクリ
ートとするために、市販の高性能減水剤もしくは流動化
剤を適量用いてもよい。これらの減水剤、流動化剤は特
に限定されない。In the method of the present invention, an appropriate amount of a commercially available high-performance water reducing agent or superplasticizer may be used in order to make the water-cement ratio 0.40 or less and to obtain a concrete having a workability that can be pumped. These water reducing agents and fluidizing agents are not particularly limited.
本発明においては、まず、以上述べたポルトランドセメ
ントシリカフユーム、鉱物質微粉末、ベントナイト、細
骨材、粗骨材、混、和剤および混練水を混合して混練す
る。この混線方法は特に限定されないが、通常比較的硬
練シに用いられている強制攪拌式ミキサーが好適である
。このようにして混練されたコンクリートは遠心力成形
される。この遠心力成形の条件は特に限定されず、従来
のボールやパイルの製造条件、例えば初速１〜５１で０
．５分、中速５〜１５ＪＦで０．５分、高速１５２以上
で５〜１０分でよい。この遠心力成形条件は、製品の形
状、寸法によって若干異なるが、本発明においては特別
な条件を設定することな〈従来実施されていた製造条件
を適宜選択して設定すればよい。このようにして遠心力
成形された遠心力成形コンクリートは、養生されて製品
となる。この養生方法は特に限定されず、水中養生、蒸
気養生、オートクレーブ養生などでよい。In the present invention, first, the above-described Portland cement silica fume, fine mineral powder, bentonite, fine aggregate, coarse aggregate, mixer, additive, and kneading water are mixed and kneaded. The mixing method is not particularly limited, but a forced stirring mixer, which is usually used for relatively hard kneading, is suitable. The concrete mixed in this way is centrifugally formed. The conditions for this centrifugal force forming are not particularly limited, and are similar to conventional ball and pile manufacturing conditions, such as initial velocity 1 to 51 and 0.
．． 5 minutes, 0.5 minutes at medium speed 5-15JF, and 5-10 minutes at high speed 152 or higher. These centrifugal force forming conditions differ slightly depending on the shape and dimensions of the product, but in the present invention, there is no need to set any special conditions; instead, conventional manufacturing conditions may be appropriately selected and set. The centrifugally formed concrete centrifugally formed in this manner is cured and becomes a product. This curing method is not particularly limited, and may be water curing, steam curing, autoclave curing, or the like.
以上のように本発明方法によシ製造される遠心力成形コ
ンクリート製品は、後の実施例に示すようにシリカフユ
ームと鉱物質微粉末、あるいはさらにベントナイトとを
本発明の範囲で併用することによシ、コンクリートに使
用する混練水量を然程増加させることなくポンプ圧送可
能なワーカビリチーを有するコンクリートを得ることが
可能となシ、これによシ遠心力成形時に発生するスラッ
ジｉ−に殆んど皆無にすることができるとともに製品の
強度改善の効果も得られる。本発明方法は、単にボール
やパイルにとどまらず、他の遠心力成形コンクリート製
品、例えばヒユーム管等の製造への応用も可能であ夛、
その改善効果は、遠心力成形コンクリ−）Ｍ品の製造者
にとって莫大である。As described above, the centrifugally formed concrete product produced by the method of the present invention can be produced by using silica fuyum and fine mineral powder, or even bentonite in combination within the scope of the present invention, as shown in the examples below. B. It is possible to obtain concrete with workability that can be pumped without significantly increasing the amount of mixing water used for concrete, and as a result, there is almost no sludge generated during centrifugal force forming. It is possible to improve the strength of the product. The method of the present invention can be applied not only to the production of balls and piles, but also to the production of other centrifugally formed concrete products, such as humid pipes, etc.
The improvement effect is enormous for manufacturers of centrifugally formed concrete products.
〈実施例〉
以下、実施例、比較例を示しながら、さらに詳細に本発
明を説明する。<Examples> Hereinafter, the present invention will be explained in more detail while showing examples and comparative examples.
実施例−１
普通ポルトランドセメン）４５０ＫＰ、ｆｆｉ久島電工
■製の比表面積２１５，０００ ｃｔｌ／ｇのシリ＝ｙ
：ｙ ／ ス） ９ Ｋ９ 、東電フライアッシュ■
Ｈ。Example-1 Ordinary Portland cement) 450KP, manufactured by ffi Kushima Electric Co., Ltd., with a specific surface area of 215,000 ctl/g=y
:y/s) 9 K9, TEPCO fly ash■
H.
粗粒フライアッシュを粉砕して比表面積８，２３０→り
とした粉砕フライアッシュｋ ９０ Ｋｐ、小笠産山砂
を５９３Ｋｐ、岩瀬産６号砕石’ｉ ８９０９、高性能
減水剤としてマイティー１５０（花王石鹸■製）を４．
５Ｋｙおよび混練水を１６１〜混合し、９０秒間強制ミ
キサーで混練した。この混練物を内径２００ Ｍ、長さ
３００！の試験用遠心力成形型枠に投入して初速２．５
ｆで０．５分、中途１０２で０．５分、高速３０ｆで２
分締め固め、スラッジの発生量を測定した。測定後その
まま室内に２４時間放置し、脱型後２０℃の水中に２７
日間養生した後圧縮強度を測定した。Crushed fly ash k 90 Kp, which has a specific surface area of 8,230 by crushing coarse fly ash, 593 Kp mountain sand from Ogasa, No. 6 crushed stone 'i 8909 from Iwase, and Mighty 150 (Kao Soap ■) as a high-performance water reducing agent. 4.
5Ky and kneading water were mixed and kneaded for 90 seconds with a forced mixer. This kneaded material has an inner diameter of 200 M and a length of 300 M! The initial velocity was 2.5 when put into the centrifugal force forming mold for testing.
0.5 minutes at f, 0.5 minutes at midway 102, 2 at high speed 30f
The amount of sludge generated was measured. After measurement, it was left indoors for 24 hours, and after demolding, it was placed in water at 20℃ for 27 hours.
After curing for one day, the compressive strength was measured.
実施例−２，３
実施例−１と同一の材料を用いて表−１に示すｉ′ヲ配
合し、実施例−１と同様に操作した。Examples 2 and 3 Using the same materials as in Example 1, the i' shown in Table 1 was blended, and the same procedure as in Example 1 was carried out.
実施例−４
実施例−１と同一の材料およびベントナイトを表−１に
示す′ｊ１を配合し、実施例−１と同様に操作した。Example-4 The same materials and bentonite as in Example-1 were blended with 'j1 shown in Table-1, and the same procedure as in Example-1 was carried out.
なお、表−１には実施例−１の配合量も示し、実施例−
１〜４の測定結果も併せて示す。In addition, Table-1 also shows the blending amount of Example-1.
The measurement results of Nos. 1 to 4 are also shown.
比較例−１〜６
表−２に示す配合割合で実施例−１と同様に操作し、そ
の測定結果を表−２に示す。Comparative Examples-1 to 6 The same procedure as in Example-1 was carried out using the blending ratios shown in Table-2, and the measurement results are shown in Table-2.
ここで、比較例−１は従来のパイル用コンクリートの代
表的な配合例であシ、シリカフニームおよび鉱物質微粉
末を用いていない例、比較例−２はシリカフニームは用
いず鉱物質微粉末のみ２５重量部用いた例、比較例−３
はシリカフニームを１重量部、鉱物質微粉末を２３重量
部用いた例、比較例−４はシリカフニームを１５重量部
、鉱物質微粉末を２重量部用いた例、比較例−５はシリ
カフニーム１ｒ−５重量部、鉱物質微粉末ｉ−５重量部
用いた例、比較例−６はシリカフユームを５重量部、鉱
物質微粉末を１０！ｆ部、ベントナイトを８ｉ量部用い
た例である。Here, Comparative Example-1 is a typical mix of conventional concrete for piles, which does not use silica hneem and mineral fine powder, and Comparative Example-2 uses only mineral fine powder without using silica hneem. Example using parts by weight, comparative example-3
is an example in which 1 part by weight of silica hneem and 23 parts by weight of fine mineral powder is used, Comparative Example-4 is an example in which 15 parts by weight of silica hneem and 2 parts by weight of fine mineral powder is used, and Comparative Example-5 is silica hneem 1r- In Comparative Example 6, 5 parts by weight of silica fuyum and 10 parts by weight of fine mineral powder i-5 were used. This is an example in which part f and bentonite were used in an amount of 8i parts.
表−１および表−２に示す結果を図面を参照しながら説
明する。The results shown in Tables 1 and 2 will be explained with reference to the drawings.
第１図は、実施例−１〜４、比較例−１〜６において遠
心力成形後に発生するスラッゾ量を示すグラフである。FIG. 1 is a graph showing the amount of slazo generated after centrifugal force forming in Examples 1 to 4 and Comparative Examples 1 to 6.
同図に示すように、本発明にかかる実施例−１〜４にお
いてはスラッジの発生がほとんどなく、従来の配合によ
る比較例−１に比べて著しく改善されていることがわか
る。As shown in the figure, in Examples 1 to 4 according to the present invention, almost no sludge was generated, and it can be seen that this was significantly improved compared to Comparative Example 1 with the conventional formulation.
これに対しシリカフユームを用いないで鉱物質微粉末の
み用いたもの（比較例−２）、シリカフニームおよび鉱
物質微粉末の量がそれぞれ本発明の範囲から上下に外れ
るもの（比較例−３，４）およびシリカフニームおよび
鉱物質微粉末のそれぞれの使用量は本発明の範囲に入る
が合計量が１０重量部で本発明の範囲から外れるもの（
比較例−５）においては、従来の配合による比較例−１
に比べるとスラッジの発生量は、多少減少しているが、
本発明にかかる実施例−１〜４はど顕著ではない。On the other hand, those in which only fine mineral powder was used without using silica funeum (Comparative Example-2), and those in which the amounts of silica funeum and fine mineral powder were both above and below the range of the present invention (Comparative Examples-3 and 4) The amounts used of each of silica hneem and fine mineral powder are within the scope of the present invention, but the total amount is 10 parts by weight and is outside the scope of the present invention (
In Comparative Example-5), Comparative Example-1 with conventional formulation
Although the amount of sludge generated has decreased somewhat compared to
Examples 1 to 4 according to the present invention are not remarkable.
また第２図は、材令２８日における実施例−１〜４およ
び比較例−１〜６の遠心力成形コンクリート試験体の圧
縮強度を示すグラフである。同図に示すように、本発明
にかかる実施例−１〜４における試験体の圧縮強度は、
従来の配合による比較例−１に比べて大幅に改善されて
おシ、また、シリカフニーム、鉱物質微粉末およびベン
トナイトの量が本発明の範囲を外れる比較例−２〜６と
比べても本発明の圧縮強度の改善効果は顕著である。Moreover, FIG. 2 is a graph showing the compressive strength of the centrifugally formed concrete test specimens of Examples-1 to 4 and Comparative Examples-1 to 6 at the age of 28 days. As shown in the figure, the compressive strengths of the test specimens in Examples 1 to 4 according to the present invention are as follows:
The present invention is greatly improved compared to Comparative Example 1 with the conventional formulation, and compared to Comparative Examples 2 to 6 in which the amounts of silica hneem, mineral fine powder, and bentonite are out of the range of the present invention. The effect of improving compressive strength is remarkable.
〈発明の効果〉
以上、実施例とともに具体的に説明したように、本発明
にかかる遠心力成形コンクリート製品の製造方法によれ
ば、複雑な工程を必要とせず従来の一般の遠心力成形方
法と同様の製造二連で、スラッジの発生を防止できる。<Effects of the Invention> As described above in detail along with the examples, the method for producing centrifugally formed concrete products according to the present invention does not require complicated processes and is different from the conventional general centrifugally forming method. The production of sludge can be prevented by repeating the same process twice.
しかも、製造された製品は従来のものに比べて圧縮強度
の高いものとなる。Furthermore, the manufactured product has higher compressive strength than conventional products.
この遠心力成形コンクリート製品の製造方法は、極めて
実用的でちゃ、社会への貢献度が極めて大きいものであ
る。This method of producing centrifugally formed concrete products is extremely practical and has an extremely large contribution to society.
第１図は、実施例−１〜４および比較例−１〜６におけ
るスラツソ発生量を示すグラフ、第２図は、実施例−１
〜４および比較例１〜６における圧縮強度を示すグラフ
である。Fig. 1 is a graph showing the amount of sludge generated in Examples-1 to 4 and Comparative Examples-1 to 6, and Fig. 2 is a graph showing the amount of sludge generated in Examples-1 to 4 and Comparative Examples-1 to 6.
4 and Comparative Examples 1 to 6. FIG.
Claims (1)
フユーム２〜１０重量部と、比表面積６，０００〜９，
０００ｃｍ＾２／ｇの鉱物質微粉末５〜２０重量部とを
両者の合計量が１５重量部以上になるように骨材の一部
として使用し、水セメント比０．４０以下の混練水を配
合して遠心成形することを特徴とする遠心力成形コンク
リート製品の製造方法。 ２）ポルトランドセメント１００重量部に対しシリカフ
ユーム２〜１０重量部と、比表面積６，０００〜９，０
００ｃｍ＾２／ｇの鉱物質微粉末４．５〜１５重量部と
、ベントナイト０．５〜５重量部とを全合計量が１５重
量部以上になるように骨材と一部として使用し、水セメ
ント比０．４０以下の混練水を配合して遠心成形するこ
とを特徴とする遠心力成形コンクリート製品の製造方法
。[Claims] 1) 2 to 10 parts by weight of silica fuyume and a specific surface area of 6,000 to 9, per 100 parts by weight of Portland cement.
000cm^2/g mineral fine powder and 5 to 20 parts by weight are used as part of the aggregate so that the total amount of both is 15 parts by weight or more, and mixing water with a water-cement ratio of 0.40 or less is used. A method for producing a centrifugally formed concrete product, characterized by mixing and centrifugally forming. 2) 2 to 10 parts by weight of silica fuyume and a specific surface area of 6,000 to 9,00 to 100 parts by weight of Portland cement.
4.5 to 15 parts by weight of fine mineral powder of 00 cm^2/g and 0.5 to 5 parts by weight of bentonite are used as part of the aggregate so that the total amount is 15 parts by weight or more, A method for producing a centrifugally formed concrete product, comprising mixing mixing water with a water-cement ratio of 0.40 or less and centrifugally forming the product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14449285A JPS627654A (en) | 1985-07-03 | 1985-07-03 | Manufacture of centrifugally formed concrete product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14449285A JPS627654A (en) | 1985-07-03 | 1985-07-03 | Manufacture of centrifugally formed concrete product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS627654A true JPS627654A (en) | 1987-01-14 |
Family
ID=15363593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14449285A Pending JPS627654A (en) | 1985-07-03 | 1985-07-03 | Manufacture of centrifugally formed concrete product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS627654A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6360142A (en) * | 1986-08-29 | 1988-03-16 | 中川ヒユ−ム管工業株式会社 | Centrifugal molding process for concrete product |
| US4861378A (en) * | 1987-03-13 | 1989-08-29 | Denki Kagaku Kogyo Kabushiki Kaisha | Cement additive containing superplasticizer and bentonite |
| JPH0244053A (en) * | 1988-08-04 | 1990-02-14 | Onoda Cement Co Ltd | Production of centrifugally formed concrete product |
| JPH0282479A (en) * | 1988-09-19 | 1990-03-23 | Kansai Electric Power Co Inc:The | Post for reducing grounding resistance and reduction of grounding resistance |
| JPH03131556A (en) * | 1989-10-16 | 1991-06-05 | Nippon Cement Co Ltd | Production of hydraulic cured article |
| JPH1179818A (en) * | 1997-09-04 | 1999-03-23 | Denki Kagaku Kogyo Kk | Cement admixture, cement composition, spraying material and spraying process using the same |
| JP2006036629A (en) * | 2004-06-24 | 2006-02-09 | Kao Corp | Hydraulic composition for centrifugally molded hardened body |
| JP2006169054A (en) * | 2004-12-16 | 2006-06-29 | Taiheiyo Cement Corp | Centrifugally molded concrete product |
| JP2019218256A (en) * | 2018-06-22 | 2019-12-26 | 住友大阪セメント株式会社 | Cement composition for centrifugal molding, and method for producing tubular molded body |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5720305A (en) * | 1980-07-11 | 1982-02-02 | Nippon Hume Pipe | Manufacture of concrete product |
| JPS59224310A (en) * | 1983-06-03 | 1984-12-17 | 旭化成株式会社 | Manufacture of centrifugal force molding concrete product |
-
1985
- 1985-07-03 JP JP14449285A patent/JPS627654A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5720305A (en) * | 1980-07-11 | 1982-02-02 | Nippon Hume Pipe | Manufacture of concrete product |
| JPS59224310A (en) * | 1983-06-03 | 1984-12-17 | 旭化成株式会社 | Manufacture of centrifugal force molding concrete product |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6360142A (en) * | 1986-08-29 | 1988-03-16 | 中川ヒユ−ム管工業株式会社 | Centrifugal molding process for concrete product |
| US4861378A (en) * | 1987-03-13 | 1989-08-29 | Denki Kagaku Kogyo Kabushiki Kaisha | Cement additive containing superplasticizer and bentonite |
| JPH0244053A (en) * | 1988-08-04 | 1990-02-14 | Onoda Cement Co Ltd | Production of centrifugally formed concrete product |
| JPH0559857B2 (en) * | 1988-08-04 | 1993-09-01 | Onoda Cement Co Ltd | |
| JPH0282479A (en) * | 1988-09-19 | 1990-03-23 | Kansai Electric Power Co Inc:The | Post for reducing grounding resistance and reduction of grounding resistance |
| JPH03131556A (en) * | 1989-10-16 | 1991-06-05 | Nippon Cement Co Ltd | Production of hydraulic cured article |
| JPH1179818A (en) * | 1997-09-04 | 1999-03-23 | Denki Kagaku Kogyo Kk | Cement admixture, cement composition, spraying material and spraying process using the same |
| JP2006036629A (en) * | 2004-06-24 | 2006-02-09 | Kao Corp | Hydraulic composition for centrifugally molded hardened body |
| JP2006169054A (en) * | 2004-12-16 | 2006-06-29 | Taiheiyo Cement Corp | Centrifugally molded concrete product |
| JP4621017B2 (en) * | 2004-12-16 | 2011-01-26 | 太平洋セメント株式会社 | Centrifugal concrete products |
| JP2019218256A (en) * | 2018-06-22 | 2019-12-26 | 住友大阪セメント株式会社 | Cement composition for centrifugal molding, and method for producing tubular molded body |
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