JP2001181012A - Method for producing instantly demolded cement product - Google Patents
Method for producing instantly demolded cement productInfo
- Publication number
- JP2001181012A JP2001181012A JP37202299A JP37202299A JP2001181012A JP 2001181012 A JP2001181012 A JP 2001181012A JP 37202299 A JP37202299 A JP 37202299A JP 37202299 A JP37202299 A JP 37202299A JP 2001181012 A JP2001181012 A JP 2001181012A
- Authority
- JP
- Japan
- Prior art keywords
- cement
- product
- cement product
- amount
- 3cao
- 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
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
- C04B7/02—Portland cement
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/02—Selection of the hardening environment
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00198—Characterisation or quantities of the compositions or their ingredients expressed as mathematical formulae or equations
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00215—Mortar or concrete mixtures defined by their oxide composition
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、即時脱型セメント
製品の製造方法に関する。尚、即時脱型で製造されるセ
メント製品としては、積みブロック、空洞コンクリート
ブロック、歩道用コンクリート平板、インターロッキン
グブロック、無筋コンクリート管 等が挙げられる。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an immediate demolded cement product. In addition, examples of the cement products manufactured by immediate demolding include pile blocks, hollow concrete blocks, sidewalk concrete plates, interlocking blocks, and unreinforced concrete pipes.
【０００２】[0002]
【従来の技術】即時脱型セメント製品は、極めて少ない
水量で混練したコンクリートを製品型枠に投入し、振動
締め固め後、直ちに脱型して養生することにより製造さ
れたコンクリート製品であり、該方法は、流し込みによ
るセメント製品の製造に比べ、型枠費を低減出来るこ
と、大量生産に適していること等の長所を持っている。
しかし、脱型後の型崩れを防ぐために混練水量を極めて
少なくすることから、充填性が悪く、一般に、緻密で高
強度を示すセメント製品の製造は困難であり、適切なセ
メント組成物の利用を含め即時脱型を可能にするセメン
ト製品製造方法の開発が要望されていた。2. Description of the Related Art Immediate demolding cement products are concrete products manufactured by putting concrete kneaded with an extremely small amount of water into a product form, compacting it by vibration, immediately demolding and curing. The method has advantages such as reduced formwork cost and suitability for mass production as compared to the production of cement products by casting.
However, since the amount of kneading water is extremely small in order to prevent the shape from being lost after demolding, the filling property is poor, and it is generally difficult to produce a dense and high-strength cement product. There has been a demand for the development of a cement product manufacturing method that enables immediate demolding.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、即時脱型を
行うにも拘わらず、高強度且つ緻密なセメント製品を与
えるセメント製品製造方法の提供を目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a method for producing a cement product which provides a high-strength and dense cement product despite immediate demolding.
【０００４】[0004]
【課題を解決するための手段】本発明者等は、セメント
中の３ＣａＯ・Ａｌ2Ｏ3量、３ＣａＯ・ＳｉＯ2量、お
よびブレーン比表面積値がある関係に在るセメント組成
物を使用する方法で、即時脱型を行うにも拘わらず、高
強度且つ緻密なセメント製品が得られることを見出し、
本発明を完成した。すなわち本発明は、３ＣａＯ・Ａｌ
2Ｏ3量が０．４〜５重量％であり、且つ、重量％で表し
た３ＣａＯ・ＳｉＯ2量を示す数値とブレーン比表面積
値（ｃｍ2／ｇ）との積が１．００×１０5〜１．５５×
１０5であるポルトランドセメントに、骨材、混練水、
更には必要に応じて混和剤を添加・混練した混練物を型
枠に投入した後、即脱型して、得られた成型品を養生し
て実施される、即時脱型セメント製品の製造方法に関す
る。以下に、本発明を詳細に説明する。Means for Solving the Problems The present inventors have proposed a method of using a cement composition in which there is a relationship between the amount of 3CaO.Al 2 O 3 in cement, the amount of 3CaO.SiO 2 , and the specific surface area of Blaine. In spite of immediate demolding, we found that a high-strength and dense cement product could be obtained,
The present invention has been completed. That is, the present invention provides 3CaO.Al
The amount of 2 O 3 is 0.4 to 5% by weight, and the product of the numerical value indicating the amount of 3CaO · SiO 2 expressed in% by weight and the Blaine specific surface area value (cm 2 / g) is 1.00 × 10 5 to 1.55x
10 5 Portland cement, aggregate, kneading water,
Furthermore, a method of manufacturing an immediate demolded cement product, in which a kneaded product obtained by adding and kneading an admixture, if necessary, is put into a mold, immediately demolded, and the obtained molded product is cured and carried out. About. Hereinafter, the present invention will be described in detail.
【０００５】[0005]
【発明の実施の形態】本発明は、セメント中の３ＣａＯ
・Ａｌ2Ｏ3量、３ＣａＯ・ＳｉＯ2量およびセメント粉
体のブレーン比表面積値を規定したポルトランドセメン
トを用いることに特徴が在る。セメント中の３ＣａＯ・
Ａｌ2Ｏ3量は、０．４〜５重量％であるようにする。セ
メント中の３ＣａＯ・Ａｌ2Ｏ3量が５より大となるとセ
メント製品の緻密さと強度が低下し、０．４未満のセメ
ントの製造は困難である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing 3CaO in cement.
It is characterized by using Portland cement in which the amount of Al 2 O 3, the amount of 3CaO · SiO 2 and the specific surface area of the cement powder are specified. 3CaO in cement
The amount of Al 2 O 3 is such a 0.4 to 5% by weight. If the amount of 3CaO.Al 2 O 3 in the cement is more than 5, the compactness and strength of the cement product are reduced, and it is difficult to produce a cement having less than 0.4.
【０００６】また、３ＣａＯ・ＳｉＯ2量は、粉体粒度
と関連しながらセメント製品の緻密性、強度に影響を及
ぼすことが見出されたが、本発明では、重量％で表した
セメント中３ＣａＯ・ＳｉＯ2量の数値と、セメント粉
体のブレーン比表面積値（ｃｍ2／ｇ）との積が１．０
０×１０5〜１．５５×１０5の範囲に在る様にする。こ
の積が１．００×１０5より小であると、セメント製品
の強度発現性が著しく遅延し、１．００×１０5より大
であると、セメント製品の緻密性と発現強度の低下を招
くことになる。It has also been found that the amount of 3CaO.SiO 2 has an effect on the compactness and strength of cement products in relation to the particle size of the powder. The product of the numerical value of the amount of SiO 2 and the specific surface area of the cement powder (cm 2 / g) is 1.0
It should be in the range of 0 × 10 5 to 1.55 × 10 5 . When this product is smaller than 1.00 × 10 5 , the strength development of the cement product is significantly delayed, and when it is larger than 1.00 × 10 5 , the compactness and the development strength of the cement product are reduced. Will be.
【０００７】上記組成を特徴とするポルトランドセメン
トには、骨材、混練水、更に必要に応じて混和剤を添加
して混練して、成型用の混練物を得る。骨材としては、
通常のコンクリートの製造に使用されるものが何ら問題
無く使用出来る。尚、粗骨材は、Ｆｕｌｌｅｒの分布に
近い粒度分布を示すものの使用が好ましい。[0007] Portland cement characterized by the above composition is mixed with an aggregate, kneading water and, if necessary, an admixture to obtain a kneaded material for molding. As aggregate,
What is used in the production of ordinary concrete can be used without any problems. The coarse aggregate preferably has a particle size distribution close to the Fuller distribution.
【０００８】混和剤は、公知の界面活性剤が用いられる
が、使用水量の少ない場合にはその使用が不可欠であ
る。尚、水の使用量は、セメント１００重量部当たり２
５重量部以下とするのが好ましい。これより大量の水の
添加は、セメント製品の強度低下に繋がり、好ましいも
のではない。As the admixture, a known surfactant is used, but when the amount of water used is small, its use is indispensable. The amount of water used is 2 per 100 parts by weight of cement.
It is preferable that the content be 5 parts by weight or less. Addition of a larger amount of water than this leads to a decrease in the strength of the cement product, and is not preferable.
【０００９】混練物は、目的形状に応じた型枠に投入し
成形される。この時、振動成形処理を加えると、充填が
より完全となり好ましい結果を得ることが出来る。振動
成形処理時間は、機械の出力、振動数等の条件にもよる
が、０．５〜１分程度で十分である。充填・成型をした
混練物は、直ちに脱型して成形体を得る。即時脱型後の
成形体には、一般のセメント製品同様に養生処理を加
え、即時脱型セメント製品を得る。[0009] The kneaded material is put into a mold corresponding to the desired shape and molded. At this time, if a vibration molding process is added, the filling becomes more complete and a favorable result can be obtained. The time required for the vibration forming process depends on the conditions such as the output of the machine and the frequency of the vibration. The filled and molded kneaded material is immediately demolded to obtain a molded product. The molded product after immediate demolding is subjected to curing treatment in the same manner as a general cement product, to obtain an immediate demolded cement product.
【００１０】[0010]
【実施例】以下では、具体的例を挙げて、本発明を更に
詳しく説明する。表１に使用セメントの特性を、普通ポ
ルトランドセメントと対比させて示す。Hereinafter, the present invention will be described in more detail with reference to specific examples. Table 1 shows the properties of the cement used in comparison with ordinary Portland cement.
【００１１】[0011]
【表１】 [Table 1]
【００１２】即時脱型セメント製品の製造は次の様に行
った。 （１）混練 セメント１００重量部に対し細骨材（海砂）２３４．５
重量部を添加し、３０秒間空練り後、非イオン系界面活
性材（サンフロー（株）社製、商品名：サンフローＭ
Ａ）０．１重量部を添加した混練水（水道水）２５重量
部を投入して更に１分間混練した。３０秒間放置した
後、壁面からの掻き落としを行い、粗骨材（砕石、最大
粒径１０ｍｍ）２４４．５重量部を添加して更に１分３
０秒間混練した。The production of the immediate demolding cement product was carried out as follows. (1) Kneading 234.5 fine aggregate (sea sand) per 100 parts by weight of cement
Parts by weight, and after kneading for 30 seconds, a nonionic surfactant (manufactured by Sunflow Corp., trade name: Sunflow M)
A) 25 parts by weight of kneading water (tap water) to which 0.1 part by weight was added was added and kneaded for 1 minute. After leaving it for 30 seconds, it was scraped off from the wall surface, 244.5 parts by weight of coarse aggregate (crushed stone, maximum particle size 10 mm) was added, and further 1 minute 3
Kneaded for 0 seconds.
【００１３】（２）成形 得られた混練物を４０×４０×１６０ｍｍの型枠に充填
し、振動数１００Ｈｚ、加速度１４Ｇ、加重０．０２ｋ
ｇｆ／ｃｍ2の条件で３０秒間振動成形した後、直ちに
脱型して成形体を得た。得られた成形体については、寸
法と重量を測定した後、乾燥しない様にシートで覆い、
２０℃で試験材齢まで養生した。(2) Molding The obtained kneaded material was filled into a 40 × 40 × 160 mm formwork, and the vibration frequency was 100 Hz, the acceleration was 14 G, and the load was 0.02 k.
After shaping for 30 seconds under the condition of gf / cm 2, the mold was immediately removed to obtain a formed body. After measuring the size and weight of the obtained molded body, cover it with a sheet so as not to dry,
Cured at 20 ° C until the age of the test material.
【００１４】（３）特性評価 所定の養生期間を経過した成形体については、ＪＩＳ
Ｒ ５２０１「セメントの物理試験方法」に則り、曲げ
強度および圧縮強度を測定した。密度は、成形体重量と
寸法の測定値から計算で求めた。結果を表２に示す。(3) Evaluation of properties For molded articles that have passed a predetermined curing period, JIS
The flexural strength and the compressive strength were measured according to R5201 “Physical test method of cement”. The density was calculated from the measured values of the molded body weight and dimensions. Table 2 shows the results.
【００１５】[0015]
【表２】 [Table 2]
【００１６】組成に特徴を有するのセメント組成物を用
いる本発明の即時脱型方法で製造した成形体は、一般の
ポルトランドセメントを用いて製造した成形体に比し
て、高密度であり且つ強度が高いことが分かる。The molded article produced by the instant demolding method of the present invention using a cement composition having a characteristic composition has a higher density and strength than molded articles produced using ordinary Portland cement. Is high.
【００１７】[0017]
【発明の効果】本発明の方法は、即時脱型を行うにも拘
わらず、高密度且つ高強度のセメント製品を与えること
から、即時脱型セメント製品の製造を可能にした。本発
明の方法は、各種ブロック、歩道用コンクリート平板値
等、即時脱型の適用が可能な製品の製造に好適に使用出
来る。According to the method of the present invention, a high-density and high-strength cement product can be obtained despite the immediate demolding, so that an immediate demolded cement product can be produced. INDUSTRIAL APPLICABILITY The method of the present invention can be suitably used for the production of products to which immediate demolding can be applied, such as various blocks, concrete flat plate for sidewalks, and the like.
Claims (1)
であり、且つ、重量％で表した３ＣａＯ・ＳｉＯ2量を
示す数値とブレーン比表面積値（ｃｍ2／ｇ）との積が
１．００×１０5〜１．５５×１０5であるポルトランド
セメントに、骨材、混練水、更には必要に応じて混和剤
を添加・混練した混練物を型枠に投入した後、即脱型し
て、得られた成型品を養生して実施される、即時脱型セ
メント製品の製造方法。1. The amount of 3CaO.Al 2 O 3 is 0.4 to 5% by weight.
And a product of a numerical value indicating the amount of 3CaO · SiO 2 expressed in% by weight and a brane specific surface area value (cm 2 / g) is 1.00 × 10 5 to 1.55 × 10 5. In addition, the aggregate, kneading water, and further, if necessary, after adding and kneading the kneaded material to which the admixture is added and kneaded, the mold is immediately removed, and the obtained molded product is cured and carried out. Manufacturing method of instant demolding cement products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP37202299A JP2001181012A (en) | 1999-12-28 | 1999-12-28 | Method for producing instantly demolded cement product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP37202299A JP2001181012A (en) | 1999-12-28 | 1999-12-28 | Method for producing instantly demolded cement product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001181012A true JP2001181012A (en) | 2001-07-03 |
Family
ID=18499714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP37202299A Pending JP2001181012A (en) | 1999-12-28 | 1999-12-28 | Method for producing instantly demolded cement product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001181012A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100381390C (en) * | 2003-07-29 | 2008-04-16 | 科发伦材料株式会社 | Plasma resistant structural parts |
-
1999
- 1999-12-28 JP JP37202299A patent/JP2001181012A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100381390C (en) * | 2003-07-29 | 2008-04-16 | 科发伦材料株式会社 | Plasma resistant structural parts |
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