JP3710851B2 - Hydraulic substance and method for producing the same - Google Patents
Hydraulic substance and method for producing the same Download PDFInfo
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- JP3710851B2 JP3710851B2 JP20751095A JP20751095A JP3710851B2 JP 3710851 B2 JP3710851 B2 JP 3710851B2 JP 20751095 A JP20751095 A JP 20751095A JP 20751095 A JP20751095 A JP 20751095A JP 3710851 B2 JP3710851 B2 JP 3710851B2
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- Prior art keywords
- antimony
- cement
- ppm
- compound
- hydraulic substance
- 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
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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
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
- C04B7/42—Active ingredients added before, or during, the burning process
- C04B7/421—Inorganic materials
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/0004—Compounds chosen for the nature of their cations
- C04B2103/0021—Compounds of elements having a valency of 3
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、通常より高強度が得られる水硬性物質に関するものである。
【０００２】
【従来の技術】
セメントの強度発現を改善するための方策としては、セメント原料の化学組成の変更による早強性のセメントの製造、有機混和剤などの使用によるコンクリート配合の水セメント比の低減、または高温養生によるセメントの水和促進などがあるが、これらには多くの設備や操作が必要であり、いずれも汎用的かつ簡便な技術とは言えなかった。
少量の添加剤により強度を促進する方法もあるが、それらは水ガラスの利用や塩化カルシウムの利用であり、添加量が数％と高く、しかも、共存する塩素やナトリウムが、鉄筋の腐食並びにアルカリ骨材反応の原因となるため、使用に制限があった。
また、添加剤については添加する時期が限定されていた。
【０００３】
【発明が解決しようとする課題】
本発明は、大規模な設備無しに、ごく少量、例えば１％程度以下の添加剤の使用により、強度発現を向上させた水硬性物質を提供することを目的とする。
【０００４】
【課題を解決するための手段】
本発明は、セメントに、アンチモン単体の量で１０〜１００００ｐｐｍのアンチモン化合物（含水の酸化アンチモンを除く）を含有させたことを特徴とする水硬性物質である。セメントに含有させるアンチモン化合物は、アンチモンの酸化物（含水の酸化アンチモンを除く）、塩化物、硫化塩、硝酸塩、有機化合物のいずれか一種もしくはこれらの混合物であり、これらの化合物の添加は、セメントクリンカー焼成前の原料段階から、セメントの混練前、さらに、セメントの混練時のいずれの段階でも良い。これにより、水硬性物質の硬化体の強度の向上を、多くの設備や操作なしに、ごく少量の添加剤の使用で実現した。
【０００５】
【発明の実施の形態】
ここでいうセメントとは、ポルトランド系セメント、流動性の向上や水和発熱量の低減のためにビーライト成分を高めた高ビーライトセメント、都市ゴミ等を原料に使用して製造された塩素を含有した含塩素セメント、速硬性成分であるＣ11Ａ7・ＣａＦ2やＣ3Ａ3・ＣａＳＯ4 （アーウィン）を含有した超速硬セメントなどである。（ここで、ＣはＣａＯ、ＡはＡｌ2Ｏ3）
ポルトランド系セメントは、普通、早強、中庸熱、白色、超早強ポルトランドセメントなどがあり、これらにスラグ、フライアッシュ、シリカフューム、石灰石微分末などを混合した各種混合セメントも含む。
【０００６】
アンチモン化合物は、価数並びに塩化物、酸化物、硫酸塩、硝酸塩、フッ化物などを問わず、輝安鉱（Ｓｂ2Ｓ3）などのアンチモンを含有する天然鉱物を使用することもできる。また酒石酸などの有機酸塩化合物でも作用する。その濃度は、アンチモン単体としてセメントに対してわずか１０ｐｐｍでもその効果が認められ、１０００ｐｐｍ程度までその効果は増大する。
またアンチモン化合物については、セメントクリンカーの焼成前の原料段階、セメントの混練前及び混練時のいずれの場合に添加してもその効果は発現する。
アンチモン化合物の作用機構は、溶液中でアンチモンがセメント鉱物の水和反応を活性化させるものと考えられる。水和反応後、アンチモン化合物は水和物中に取り込まれる。
【０００７】
【実施例】
各種のアンチモン化合物を、アンチモン単体として１、１０、１００、１０００及び１００００ｐｐｍ、普通ポルトランドセメント、フライアッシュセメント、高炉セメントに添加して使用し、水セメント比０．６、細骨材として細砂を用い、砂セメント比２．５でモルタルを調製した。
混練はホバートミキサーにより行い、４×４×１６ｃｍに成形し、翌日脱型後、材齢２８日まで水中養生を行い、圧縮強度試験をおこなった。
アンチモン化合物の種類及び添加量、セメントの種類、材齢２８日のモルタル強度を表１に示す。
またセメント原料の段階で、焼成後のセメントに対してアンチモン単体で１００ｐｐｍとなるようにアンチモン化合物を添加して試製した普通ポルトランドセメントに関しても同様な試験を行い、結果を表１に示した。
【０００８】
【表１】
アンチモン無添加のＮｏ．１の普通セメントはモルタル強度は３０．０Ｎ／ｍｍ2である。
Ｎｏ．３のアンチモン単体として１ｐｐｍの塩化アンチモンの添加では殆ど効果が現れないが、Ｎｏ．４の１０ｐｐｍでは３．５Ｎ／ｍｍ2 多い３３．５Ｎ／ｍｍ2となり、添加の効果が認められた。
また各材令の強度は、Ｎｏ．１では材齢３日が８．０Ｎ／ｍｍ2 、７日が１７．５Ｎ／ｍｍ2 、２８日が３０．０Ｎ／ｍｍ2 であるのに対して、アンチモン単体として１００ｐｐｍの塩化アンチモンを添加したＮｏ．５では、材齢３日が１１．０／ｍｍ2 、７日が２１．０Ｎ／ｍｍ2 、２８日が３５．５Ｎ／ｍｍ2 と無添加に比べて初期の材齢からその効果が認められる。
アンチモン化合物はどの種類でも寄与が大きく、アンチモン単体として１０００ｐｐｍの添加まで、その効果は顕著に認められた。また、セメントの種類としては、普通ポルトランドセメントの他、各種混合セメントにおいてもその効果は認められた。
セメント原料にアンチモン化合物を添加し、焼成して得たクリンカーから製造した試製の普通ポルトランドセメントも表中のＮｏ．１７に示すように、強度発現が向上している。
【００１０】
なお、アンチモンの硬化体からの溶出については、試験例のＮｏ．７の強度試験後のモルタルを破砕し、溶出試験を行ったが、アンチモンの溶出量は１ｐｐｍ以下であり、検出されなかった。
【００１１】
【発明の効果】
以上説明したように本発明では、セメントの水和促進剤としてアンチモン化合物を、セメントクリンカーの焼成前の原料段階から、セメントの混練前、さらにセメントの混練時の任意の段階で、少量添加することにより、これを含むセメントは高い強度発現を示す。これにより大規模な設備や操作を必要とせず、強度発現の優れたコンクリートを製造することができる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hydraulic substance capable of obtaining higher strength than usual.
[0002]
[Prior art]
Measures to improve the strength development of cement include the production of early-strength cement by changing the chemical composition of the cement raw material, the reduction of the water-cement ratio of the concrete blend by using organic admixtures, or the cement by high-temperature curing However, these require a lot of equipment and operation, and none of them is a general-purpose and simple technique.
There is also a method of promoting strength with a small amount of additive, but these are the use of water glass and calcium chloride, and the addition amount is high at several percent, and the coexisting chlorine and sodium are corrosion of reinforcing steel and alkali. Since it causes an aggregate reaction, its use has been limited.
Moreover, about the additive, the time to add was limited.
[0003]
[Problems to be solved by the invention]
An object of the present invention is to provide a hydraulic substance with improved strength development by using an additive in a very small amount, for example, about 1% or less, without a large-scale facility.
[0004]
[Means for Solving the Problems]
The present invention is a hydraulic substance characterized in that cement contains 10 to 10,000 ppm of antimony compound (excluding water- containing antimony oxide) in an amount of simple antimony . The antimony compound to be contained in the cement is any one of antimony oxides (excluding water-containing antimony oxide) , chlorides, sulfides, nitrates, and organic compounds, or a mixture thereof. It may be any stage from the raw material stage before clinker firing, before cement kneading, and further during cement kneading. As a result, the strength of the hardened body of hydraulic material was improved by using a very small amount of additive without much equipment and operation.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The term “cement” as used herein refers to Portland-based cement, high belite cement with increased belite composition to improve fluidity and reduce hydration heat, and chlorine produced using municipal waste as raw materials. Chlorine-containing cements containing C, and super fast-hardening cements containing C 11 A 7 · CaF 2 and C 3 A 3 · CaSO 4 (Erwin), which are fast-hardening components. (Where C is CaO, A is Al 2 O 3 )
Portland-based cements include normal, early strength, moderately hot, white, and ultra-early strength Portland cements, and various mixed cements that are mixed with slag, fly ash, silica fume, limestone powder, and the like.
[0006]
The antimony compound may be a natural mineral containing antimony such as bright ore (Sb 2 S 3 ), regardless of valence and chloride, oxide, sulfate, nitrate, fluoride and the like. Also works with organic acid salt compounds such as tartaric acid. The effect is recognized even when the concentration of antimony alone is only 10 ppm with respect to cement, and the effect increases to about 1000 ppm.
The antimony compound exhibits its effect even if it is added in any of the raw material stage before firing the cement clinker, before the cement kneading and during the kneading.
The action mechanism of the antimony compound is considered to be that antimony activates the hydration reaction of the cement mineral in the solution. After the hydration reaction, the antimony compound is incorporated into the hydrate.
[0007]
【Example】
Various antimony compounds are used by adding 1, 10, 100, 1000 and 10000 ppm as antimony alone, ordinary Portland cement, fly ash cement, blast furnace cement, water cement ratio 0.6, fine sand as fine aggregate Used, mortar was prepared with a sand cement ratio of 2.5.
The kneading was performed by a Hobart mixer, molded into 4 × 4 × 16 cm, demolded the next day, and then cured under water until the age of 28 days, and a compressive strength test was performed.
Table 1 shows the type and amount of the antimony compound, the type of cement, and the mortar strength at the age of 28 days.
Similar tests were conducted on ordinary Portland cement, which was prepared by adding an antimony compound so that the amount of antimony alone was 100 ppm with respect to the cement after firing at the cement raw material stage, and the results are shown in Table 1.
[0008]
[Table 1]
No. with no antimony added. No. 1 ordinary cement has a mortar strength of 30.0 N / mm 2 .
No. No. 3 antimony alone added with 1 ppm of antimony chloride has little effect. At 10 ppm of 4, 33.5 N / mm 2 increased by 3.5 N / mm 2 , and the effect of addition was recognized.
The strength of each material age is No. Against the 1 age of three days 8.0N / mm 2, 7 days of 17.5N / mm 2, 28 days are 30.0 N / mm 2, it was added 100ppm of antimony chloride as antimony alone No. In 5, is observed the effects from the initial wood age than age of 3 days 11.0 / mm 2, 7 days 21.0N / mm 2, 28 days additive-free and 35.5N / mm 2 .
Any kind of antimony compound contributed greatly, and the effect was remarkably recognized until the addition of 1000 ppm as a simple substance of antimony. Moreover, the effect was recognized also in various mixed cements other than normal Portland cement as a kind of cement.
A trial ordinary Portland cement manufactured from a clinker obtained by adding an antimony compound to a cement raw material and calcining was also No. 1 in the table. As shown in FIG. 17, the strength expression is improved.
[0010]
In addition, about the elution from the hardened | cured material of antimony, it is No. of a test example. The mortar after the strength test of No. 7 was crushed and an elution test was conducted. However, the elution amount of antimony was 1 ppm or less and was not detected.
[0011]
【The invention's effect】
As described above, in the present invention, a small amount of an antimony compound is added as a cement hydration accelerator from the raw material stage before cement clinker firing, before cement kneading, and further at any stage during cement kneading. Therefore, the cement containing the same exhibits high strength. As a result, it is possible to produce concrete having excellent strength without requiring large-scale facilities and operations.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20751095A JP3710851B2 (en) | 1995-07-21 | 1995-07-21 | Hydraulic substance and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20751095A JP3710851B2 (en) | 1995-07-21 | 1995-07-21 | Hydraulic substance and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0930856A JPH0930856A (en) | 1997-02-04 |
| JP3710851B2 true JP3710851B2 (en) | 2005-10-26 |
Family
ID=16540921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20751095A Expired - Fee Related JP3710851B2 (en) | 1995-07-21 | 1995-07-21 | Hydraulic substance and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3710851B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7197921B2 (en) | 2020-02-25 | 2022-12-28 | 株式会社笠井仏檀工芸 | work face mask |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6500277B2 (en) * | 2016-03-22 | 2019-04-17 | 住友大阪セメント株式会社 | Cement clinker composition and portland cement composition |
| JP2019031440A (en) * | 2018-11-02 | 2019-02-28 | 住友大阪セメント株式会社 | Cement clinker composition and portland cement composition |
-
1995
- 1995-07-21 JP JP20751095A patent/JP3710851B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7197921B2 (en) | 2020-02-25 | 2022-12-28 | 株式会社笠井仏檀工芸 | work face mask |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0930856A (en) | 1997-02-04 |
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