JPS6197154A - Low exothermic mixed cement composition - Google Patents
Low exothermic mixed cement compositionInfo
- Publication number
- JPS6197154A JPS6197154A JP21427484A JP21427484A JPS6197154A JP S6197154 A JPS6197154 A JP S6197154A JP 21427484 A JP21427484 A JP 21427484A JP 21427484 A JP21427484 A JP 21427484A JP S6197154 A JPS6197154 A JP S6197154A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- powder
- parts
- hydration
- mixed cement
- 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
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、マツシブな構造物用の低発熱型混合セメント
組成物に関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a low heat generation type mixed cement composition for use in muscular structures.
〈従来の技術〉
従来から公知の低発熱型混合セメント組成物は、ポルト
ランドセメントと高炉水砕スラグ粉末とプライアツシエ
との混合物で、石臂補正ケする場合としない場合がある
。<Prior Art> A conventionally known low heat generation type mixed cement composition is a mixture of Portland cement, granulated blast furnace slag powder, and plywood, and may or may not be subjected to stone calf correction.
〈発明が解決しようとする問題点〉
上記従来のものは、−１ずれも材令公日におけ
′る水和熱が低いものでも６０ ｃａ１７９以上であり
、低発熱型混合セメント組成物としては、まだまだ水和
熱が高子ぎるという問題点を有している。<Problems to be solved by the invention> The above-mentioned conventional method has a -1 deviation in the material ordinance public day.
Even those with a low heat of hydration are 60 ca179 or more, and as a low heat generation type mixed cement composition, there is still a problem that the heat of hydration is too high.
また、近年は、構造物が大型化しているために従来品よ
り更に水和熱の低い低発熱型混合セメントの開発が待ち
望まれている。In addition, in recent years, as structures have become larger, there has been a desire for the development of a low-heat-generating mixed cement that has an even lower heat of hydration than conventional products.
このような状況に鑑み、本発明の目的とするところは、
従来から市販されているこの種の低発熱型混合セメント
組成物の品質を保持して。In view of this situation, the purpose of the present invention is to
Maintains the quality of this type of low heat generation mixed cement composition that has been commercially available.
かつ、材令四日における水和熱が、５０ ｃａｌ／９以
下である低発熱屋混合セメント組成物を提供丁ることに
ある。Another object of the present invention is to provide a low-heat-generating mixed cement composition having a heat of hydration of 50 cal/9 or less at 4 days of age.
〈問題を解決するための方法〉
本発明の低発熱型混合セメント組成物は、ポルトランド
セメント１重量部と高炉水砕スラグ粉末０〜３重量部お
よびフライアッシュ０〜１重量部との混合物の１００重
量部に、石灰石微粉末１〜５重量部あるいは４０４以内
の粘土類微粉末を含む石灰石微粉末１〜５重量部と石膏
粉末１〜５重量部を添加混合したものである。<Method for solving the problem> The low heat generation type mixed cement composition of the present invention comprises 100 parts by weight of a mixture of 1 part by weight of Portland cement, 0 to 3 parts by weight of granulated blast furnace slag powder, and 0 to 1 part by weight of fly ash. 1 to 5 parts by weight of fine limestone powder or 1 to 5 parts by weight of fine limestone powder containing fine clay powder of 404 or less and 1 to 5 parts by weight of gypsum powder are added and mixed to parts by weight.
〈作 用〉
上記本発明では、石灰石微粉末あるいを工粘土類微粉末
を含む石灰石微粉末と石膏粉末の共存による相乗効果が
、水和熱を大幅に低下させる作用ｔなし、材令５日にお
ける水和熱Ｙ： ５０ ｃａｌ、１以下とするものであ
る。<Function> In the present invention, the synergistic effect of the coexistence of fine limestone powder or fine clay powder and gypsum powder has no effect of significantly reducing the heat of hydration. Heat of hydration Y: 50 cal, 1 or less.
この作用機構については、現在のところ明確ではないが
、カルシウムの硫酸塩と炭酸塩の共存により、ポルトラ
ンドセメント中に含まれる特に水和熱の高いアルミン酸
゛カルシウム（Ｃ３Ａと称する）の水和速度χ抑制する
ものと考えられる。The mechanism of this action is not clear at present, but due to the coexistence of calcium sulfate and carbonate, the hydration rate of calcium aluminate (referred to as C3A), which has a particularly high heat of hydration and is contained in Portland cement, is increased. It is thought to suppress χ.
更にくわしく説明丁れば、ＣａＡの水和に際し、石膏を
共存させてお（と、Ｃ３Ａと石膏とが反応してエトリン
ガイト層を生成し、Ｃ３Ａの表面を覆５ため、Ｃ３Ａの
水和速度が抑制され水和による発熱が抑制される。To explain in more detail, when hydrating CaA, when gypsum coexists, C3A and gypsum react to form an ettringite layer, which covers the surface of C3A, thereby increasing the hydration rate of C3A. This suppresses heat generation due to hydration.
しかし、Ｃ３Ａの水和速度ン抑制するという目的で多量
の石膏を添加すると水和熱は低下するが、コンクリート
等の強度が大幅に低下すると共ニ、コンクリートが異常
膨張するとい５問題点等が発生する。However, when a large amount of gypsum is added for the purpose of suppressing the hydration rate of C3A, the heat of hydration decreases, but the strength of the concrete etc. decreases significantly and the concrete expands abnormally. Occur.
一方、石膏添加量ｔコンクリートの強度等に問題χ起さ
ない範囲内にとどめると、石膏は、全てエートリンガイ
ト生成に消費されてしまうために、未反応のＣ３Ａが残
存し、これが水和する際に多量の水和熱音発生する。On the other hand, if the amount of gypsum added is kept within a range that does not cause problems with the strength of concrete, etc., all of the gypsum will be consumed in the production of ettringite, so unreacted C3A will remain and this will become hydrated. During this process, a large amount of hydration heat is generated.
ここでこの未反応のＣ３Ａ量に見合５量の石灰石微粉末
も共存させてお（と、カルシウムの硫酸塩と炭酸塩が置
換した構造のエトリンガイト層が、未反応Ｃ３Ａ １７
）表面を覆うので、欺反葛Ｃ３＝かり・表言ｌ涜づ攬−
奢未反応Ｃ３Ａの水和速度が抑制され水和による発熱が
抑制される。Here, an amount of fine limestone powder corresponding to the amount of unreacted C3A is also allowed to coexist (and an ettringite layer with a structure in which calcium sulfate and carbonate are substituted is formed by unreacted C3A 17
) Since it covers the surface, it is deceitful and counterproductive.
The hydration rate of unreacted C3A is suppressed, and heat generation due to hydration is suppressed.
以上説明した反応が、実際には、このように段階的に起
ンのではなく、カルシウムの硫酸塩と炭酸塩ン併用して
共存させてお（と、それぞれ両者から生成するエトリン
ガイトの結晶粒径が異なっているため、エトリンガイト
結晶が、互い゛に間隙を埋め合った緻密なエトリンガイ
ト層を形成して、 Ｃ３Ａの表面を覆うので、Ｃ３Ａの
水和速度が大幅に抑制される。In reality, the reaction explained above does not occur in stages like this, but is caused by the coexistence of calcium sulfate and carbonate (and the crystal grain size of ettringite produced from both). Since the ettringite crystals are different, the ettringite crystals form a dense ettringite layer that fills the gaps between each other and covers the surface of C3A, thereby significantly suppressing the hydration rate of C3A.
以上説明した現象によって、石灰石微粉末または石膏粉
末ン単独添加した場合に比較して、石灰石微粉末と石膏
粉末を併用して添加した場合の方が、両者の相乗効果に
よって、水和熱が大幅に低下するものと考えられる。Due to the phenomenon explained above, compared to when fine limestone powder or gypsum powder is added alone, when fine limestone powder and gypsum powder are added together, the heat of hydration is significantly greater due to the synergistic effect of the two. It is thought that this will decrease.
なお、石灰石微粉末の添加によるＣ３Ａの水和速度の抑
制が、コンクリートの強度等におよぼす影響は、後述す
るＪ：うに、特に問題とはならない。Note that the effect of suppressing the hydration rate of C3A by adding fine limestone powder on the strength of concrete does not pose a particular problem as described below.
〈実施例〉 以下、本発明の実施例について説明する。<Example> Examples of the present invention will be described below.
普通ポルトランドセメント１重量部と高炉水砕スラグ粉
末１．６重量部およびフライアッシュ０．７重量部との
混合物（組成物−Ａと称する）の材令四日における水和
熱は、６４．３ｃａｌ／ ９であったが、これの１００
重量部に、石灰石微粉末３重量部を添加した混合物（組
成物−Ｂと称する）の材令四日における水和熱は、６２
．７ｃａｌ／ ９に低下した。The heat of hydration of a mixture of 1 part by weight of ordinary Portland cement, 1.6 parts by weight of granulated blast furnace slag powder, and 0.7 parts by weight of fly ash (referred to as Composition-A) at 4 days of age is 64.3 cal. / It was 9, but this is 100
The heat of hydration of a mixture (referred to as Composition-B) in which 3 parts by weight of fine limestone powder was added to 3 parts by weight was 62
．． It decreased to 7cal/9.
一方組成物−人の１００重量部に、石膏粉末３重量部を
添加した混合物（組成物−Ｃと称する）の材令四日にお
ける水和熱は、６１．６ｃａｌ／ ｇであった。なお、
組成物−ＡおよびＣが従来から市販されているこの種の
低発熱型混合セメント組成物に相当する。On the other hand, the heat of hydration of a mixture (referred to as Composition-C) in which 3 parts by weight of gypsum powder was added to 100 parts by weight of Composition-Human was 61.6 cal/g at 4 days of age. In addition,
Compositions A and C correspond to this type of low heat generation mixed cement compositions that have been conventionally commercially available.
ここで、組成物−人の１００重量部に、石灰石微粉末３
重量部および石膏粉末３重量部を併用して添加しπ混合
物（組成物−Ｄと称する）乞試製したところ、材令四日
における水和熱は、４８．９ ｃａｌ／ｐと大幅に低下
した。なお、組成物−Ｄが、本発明に係る特許請求の範
囲第（１）項記載の低発熱型混合セメント組成物である
。Here, 3 parts by weight of fine limestone powder is added to 100 parts by weight of the composition.
When a π mixture (referred to as Composition-D) was prepared by adding 3 parts by weight of gypsum powder and 3 parts by weight of gypsum powder, the heat of hydration at 4 days of age was significantly reduced to 48.9 cal/p. . Composition-D is a low heat generation type mixed cement composition as described in claim (1) of the present invention.
以上のことから、石灰石微粉末または石膏粉末を単独添
加した場合に比較して、石灰石微粉末および石膏粉末を
併用し℃添加した場合の方が、両者の相乗効果によって
、水和熱が大幅に低下すること−がわかった。From the above, compared to when fine limestone powder or gypsum powder is added alone, when fine limestone powder and gypsum powder are added in combination, the heat of hydration is significantly greater due to the synergistic effect of the two. It was found that the temperature decreases.
次に、組成物−人の１００重量部に、改質添加材として
石灰石微粉末に換えて、粘土顕微粉末ｔ４０ｅＩＩ含む
石灰石微粉末４重量部および石膏粉末３重量部を併用し
て添加した混合物（ｍ放物−Ｅと称する）の材令四日に
おける水和熱は、組成物−りとほぼ同等の４９．５ｃａ
ｌ／ ｊｉであった。Next, a mixture of 4 parts by weight of fine limestone powder containing clay microscopic powder t40eII and 3 parts by weight of gypsum powder was added to 100 parts by weight of the composition (instead of fine limestone powder as a modifying additive). The heat of hydration of the material (referred to as "m parabolic-E") at 4 days of age is 49.5 ca, which is almost the same as that of the composition.
It was l/ji.
このことから、改質添加材としての石灰石微粉末は、４
Ｏ％以内の粘土類微粉末を含む石灰石微粉末であっても
、はぼ同等の効果があることが分った。なお、組成物−
Ｅが、本発明（係る特許請求の範囲第（２）項記載の低
発熱型混合セメント組成物であり、また、セメント調合
原料微粉末も、粘土類微粉末を含む石灰石微粉末である
ので、同様の水和熱低減効果がある。From this, fine limestone powder as a modifying additive is
It was found that even fine limestone powder containing clay fine powder within 0% had almost the same effect. In addition, the composition -
Since E is a low heat generation mixed cement composition according to the present invention (claim (2)), and the cement preparation raw material fine powder is also a limestone fine powder containing a clay fine powder, It has a similar effect of reducing heat of hydration.
市販されているこの種の低発熱型混合セメント組成物に
は、従来から石膏粉末が補正されている場合もあるが、
いずれにしても、石灰石微粉末と石膏粉末との共存によ
る相乗効果によって、Ｃ３Ａの水和速度が、大幅に抑制
されること奮発見したことによって、材令四日における
水和熱が、５０ ｃａｌ／／９以下である当該低発熱型
混合セメント組成物の発明を完成するに至った。Some commercially available low heat generation mixed cement compositions have been supplemented with gypsum powder.
In any case, we have discovered that the synergistic effect of the coexistence of fine limestone powder and gypsum powder greatly suppresses the hydration rate of C3A, and the heat of hydration at 4 days of age has been reduced to 50 cal. We have now completed the invention of the low heat generation mixed cement composition having a temperature of 9 or less.
次に、組成物−Ａ、Ｂ％Ｃ％ＤおよびＥの品質について
説明する。Next, the quality of compositions-A, B%C%D and E will be explained.
表−１に示すよ５に、当該低発熱型混合セメント組成物
−ＤおよびＥは、従来から市販されているこの種の低発
熱製混合セメント組成物−人およびＣの凝結時間とはぼ
同等であるつ表−Ｉ ＪＩ３凝結時間
表−２に示すように、当該低発熱量混合セメント組成物
−りおよびＥは、従来から市販されているこの種の低発
熱型混合セメント組成物−人およびＣの圧縮強度とほぼ
同等である。As shown in Table 1, the low heat generation mixed cement compositions D and E have approximately the same setting time as conventionally commercially available low heat generation mixed cement compositions of this type - Human and C. As shown in Table I JI3 Setting Time Table 2, the low calorific value mixed cement composition and The compressive strength is almost the same as that of C.
表−３に示すコンクリートの水セメント比は５０％であ
り、抄本は４４チであり、単位セメント量は２９２ｋｙ
／％である。The water-cement ratio of the concrete shown in Table 3 is 50%, the extract is 44 cm, and the unit cement amount is 292 ky.
/%.
表−３コンクリート圧縮強度（ｋｇ／ ｃｍ２）メント
組成物−りおよびＥは、従来から市販されているこの種
の低発熱型混合セメント組成物−ＡおよびＣの圧縮強度
とほぼ同等である。Table 3: Concrete compressive strength (kg/cm2) of cement compositions RI and E are almost equivalent to the compressive strengths of this type of low heat generation mixed cement compositions A and C, which have been commercially available.
この他に、石灰石微粉末の添加が、コンクリートのスラ
ンプ、空気量、ブリージング、静弾性係数、透水性およ
び乾燥収縮におよぼ丁影響はいずれも認められなかった
。In addition, the addition of fine limestone powder had no effect on concrete slump, air content, breathing, static elastic modulus, water permeability, and drying shrinkage.
また、普通ポルトランドセメントより水和熱の低い、中
庸熱ポルトランドセメントあるいは耐硫酸塩ポルトラン
ドセメントを母体セメントとして、当該低発熱型混合セ
メント組成物を製造丁れば、本発明の完成によって、そ
の水和熱が更に低下することは容易に類推できる。Furthermore, if the low heat generation mixed cement composition is manufactured using moderate heat Portland cement or sulfate-resistant Portland cement, which has a lower heat of hydration than ordinary Portland cement, as a base cement, the completion of the present invention will allow the hydration of It is easy to infer that the heat further decreases.
〈発明の効果〉
以上のように本発明では、従来品と同等の品質で、かつ
、材令四日におけろ水和熱が５０ｃａＶＩ以下である驚
異的な低発熱型混合セメント組成物の提供を可能にした
ものである。<Effects of the Invention> As described above, the present invention provides an amazing low heat generation type mixed cement composition that has the same quality as conventional products and has a heat of hydration of 50 caVI or less at 4 days old. This is what made it possible.
Claims (3)
粉末０〜３重量部およびフライアッシュ０〜１重量部と
の混合物の１００重量部に、石灰石微粉末１〜５重量部
および石膏粉末１〜５重量部を添加混合することを特徴
とする低発熱型混合セメント組成物。(1) To 100 parts by weight of a mixture of 1 part by weight of Portland cement, 0 to 3 parts by weight of granulated blast furnace slag powder, and 0 to 1 part by weight of fly ash, 1 to 5 parts by weight of fine limestone powder and 1 to 5 parts by weight of gypsum powder. A low heat generation type mixed cement composition characterized by adding and mixing parts by weight.
を含む石灰石微粉末である特許請求の範囲第（１）項記
載の低発熱型混合セメント組成物。(2) The low heat generation type mixed cement composition according to claim (1), wherein the limestone fine powder is a limestone fine powder containing up to 40% clay fine powder.
ドセメント、中庸熱ポルトランドセメントあるいは耐硫
酸塩ポルトランドセメントである特許請求の範囲第（１
）項記載の低発熱型混合セメント組成物。(3) The above-mentioned Portland cement is ordinary Portland cement, moderate heat Portland cement, or sulfate-resistant Portland cement.
) The low heat generation type mixed cement composition described in item 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21427484A JPS6197154A (en) | 1984-10-15 | 1984-10-15 | Low exothermic mixed cement composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21427484A JPS6197154A (en) | 1984-10-15 | 1984-10-15 | Low exothermic mixed cement composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6197154A true JPS6197154A (en) | 1986-05-15 |
Family
ID=16653015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21427484A Pending JPS6197154A (en) | 1984-10-15 | 1984-10-15 | Low exothermic mixed cement composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6197154A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63103848A (en) * | 1986-10-17 | 1988-05-09 | 第一セメント株式会社 | Plaster cement |
| JPH0648790A (en) * | 1992-07-31 | 1994-02-22 | Sumitomo Cement Co Ltd | High tensile-strength type ultralow exotherm cement |
| KR20010102815A (en) * | 2000-05-08 | 2001-11-16 | 전원재 | An expanding agent, a self-stressing cement mixed with an expanding agent, and a method for allowing self-stress to cement |
| KR100498760B1 (en) * | 2001-05-09 | 2005-07-01 | 남동희 | An expanding agent, a self-stressing cement mixed with an expanding agent, and a method for allowing self-stress to cement |
| JP2009208971A (en) * | 2008-02-29 | 2009-09-17 | Taiheiyo Cement Corp | Sulfuric acid resistant cement additive and sulfuric acid resistant cement composition |
| JP2009227549A (en) * | 2008-03-25 | 2009-10-08 | Taiheiyo Cement Corp | Cement additive and cement composition |
| US8133317B2 (en) | 2005-10-17 | 2012-03-13 | Taiheiyo Cement Corporation | Cement additive and cement composition |
| JP2021155266A (en) * | 2020-03-27 | 2021-10-07 | 太平洋セメント株式会社 | Cement composition, and manufacturing method cement hardened body |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5767051A (en) * | 1980-10-06 | 1982-04-23 | Onoda Cement Co Ltd | Hydraulic composition |
-
1984
- 1984-10-15 JP JP21427484A patent/JPS6197154A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5767051A (en) * | 1980-10-06 | 1982-04-23 | Onoda Cement Co Ltd | Hydraulic composition |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63103848A (en) * | 1986-10-17 | 1988-05-09 | 第一セメント株式会社 | Plaster cement |
| JPH0242782B2 (en) * | 1986-10-17 | 1990-09-26 | ||
| JPH0648790A (en) * | 1992-07-31 | 1994-02-22 | Sumitomo Cement Co Ltd | High tensile-strength type ultralow exotherm cement |
| KR20010102815A (en) * | 2000-05-08 | 2001-11-16 | 전원재 | An expanding agent, a self-stressing cement mixed with an expanding agent, and a method for allowing self-stress to cement |
| KR100498760B1 (en) * | 2001-05-09 | 2005-07-01 | 남동희 | An expanding agent, a self-stressing cement mixed with an expanding agent, and a method for allowing self-stress to cement |
| US8133317B2 (en) | 2005-10-17 | 2012-03-13 | Taiheiyo Cement Corporation | Cement additive and cement composition |
| JP2009208971A (en) * | 2008-02-29 | 2009-09-17 | Taiheiyo Cement Corp | Sulfuric acid resistant cement additive and sulfuric acid resistant cement composition |
| JP2009227549A (en) * | 2008-03-25 | 2009-10-08 | Taiheiyo Cement Corp | Cement additive and cement composition |
| JP2021155266A (en) * | 2020-03-27 | 2021-10-07 | 太平洋セメント株式会社 | Cement composition, and manufacturing method cement hardened body |
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