JPH0369534A - Method for regulating ratio of both heat of hydration and strength of cement - Google Patents
Method for regulating ratio of both heat of hydration and strength of cementInfo
- Publication number
- JPH0369534A JPH0369534A JP1201230A JP20123089A JPH0369534A JP H0369534 A JPH0369534 A JP H0369534A JP 1201230 A JP1201230 A JP 1201230A JP 20123089 A JP20123089 A JP 20123089A JP H0369534 A JPH0369534 A JP H0369534A
- Authority
- JP
- Japan
- Prior art keywords
- hydration
- heat
- cement
- strength
- blending
- 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
- 238000006703 hydration reaction Methods 0.000 title claims abstract description 32
- 230000036571 hydration Effects 0.000 title claims abstract description 31
- 239000004568 cement Substances 0.000 title claims abstract description 25
- 230000001105 regulatory effect Effects 0.000 title abstract 6
- 238000000034 method Methods 0.000 title description 10
- 239000002893 slag Substances 0.000 claims abstract description 27
- 239000011398 Portland cement Substances 0.000 claims abstract description 19
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 229910052602 gypsum Inorganic materials 0.000 claims abstract 2
- 239000010440 gypsum Substances 0.000 claims abstract 2
- 230000000694 effects Effects 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 239000004567 concrete Substances 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 3
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 230000032683 aging Effects 0.000 abstract 1
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 230000000887 hydrating effect Effects 0.000 abstract 1
- 238000004898 kneading Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 7
- 238000010276 construction Methods 0.000 description 5
- 239000010881 fly ash Substances 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- -1 C3S Chemical class 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000002085 irritant Substances 0.000 description 1
- 231100000021 irritant Toxicity 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、ガラス質高炉スラグの粉末度と各種ポルトラ
ンドセメントへの配合率を調整することにより、セメン
トの水和熱と強度の比をコントロールする方法に関する
ものである。[Detailed Description of the Invention] Industrial Application Field The present invention is a method for controlling the ratio of heat of hydration to strength of cement by adjusting the fineness of vitreous blast furnace slag and its blending ratio in various types of Portland cement. It is related to.
従来の技術
セメントの従来品（ＪＩＳ規格品）の水和熱および強度
のコントロールは、−量的に第１段階（ＪＩＳＲ５２１
０）、第２段階（ＪＩＳＲ５２１１、ＪＩＳＲ５，２１
３など）の方法がある。Conventional technology Control of the heat of hydration and strength of conventional cement products (JIS standard products) - quantitatively in the first stage (JISR521
0), second stage (JISR5211, JISR5,21
There are two methods (such as 3).
その第１段階の方法は化学的な成分（水硬性化合物）の
調整に基づいて行われていた。The first stage of the process was based on the adjustment of chemical components (hydraulic compounds).
セメントは、水と反応して硬化する性質をもつものであ
るが、水と反応して難溶性の水和物を生成する水硬性化
合物、おもに、Ｃ３Ｓ、Ｃ２Ｓ、Ｃ３Ａ、Ｃ４ＡＦ、（
セメント化学で使用する酸化物の化学式％式％
Ｆｅ２Ｏ３＝ Ｆ、Ｈ２０＝Ｈ）から構成され、それぞ
れの量的比率を変えることにより、性質を変化させるこ
とが可能である。これら化合物のセメントの諸性質に与
えるおよその働きを下表に示す。Cement has the property of hardening when it reacts with water, and it is composed of hydraulic compounds, mainly C3S, C2S, C3A, C4AF, (
It is composed of the chemical formula (%) of oxides used in cement chemistry (Fe2O3 = F, H20 = H), and its properties can be changed by changing the quantitative ratio of each. The approximate effects of these compounds on the properties of cement are shown in the table below.
ポルトランドセメントの硬化までの経過を簡単に説明す
ると、セメントに水が加えられるとセメント中の水硬性
化合物と水との反応、いわゆる水利が開始される。十数
時間にわたり活発な水和反応が起こり、セメント粒子間
隙は生成するＣ−９−Ｈなどによって密に埋められ、次
第に硬化が進んでゆく。従ってセメントの圧縮強さは材
令と共に増大する。To briefly explain the process of hardening of Portland cement, when water is added to cement, a reaction between the hydraulic compounds in the cement and the water, so-called water utilization, begins. An active hydration reaction occurs for over ten hours, and the gaps between the cement particles are densely filled with the generated C-9-H, and hardening progresses gradually. Therefore, the compressive strength of cement increases with age.
また、水和の過程で発熱し、この熱を水和熱という。ダ
ムまたは巨大構造物は、水和により発生した熱が内部に
蓄積されるので、これを防止する必要がある。Also, heat is generated during the hydration process, and this heat is called heat of hydration. Dams or large structures need to prevent heat generated by hydration from accumulating internally.
これを第１表で説明すると、早強ポルトランドセメント
は、水硬性化合物の標準的含有量が、Ｃ３Ｓ６７％、Ｃ
２Ｓ９％、Ｃ３Ａ８％、Ｃ４ＡＦ ８％で微粉砕して
いる。短期強度の高いセメントであることからプレスト
レストコンクリート、セメント二次製品、冬期工事、緊
急工事などに用いられる。To explain this in Table 1, early-strength Portland cement has a standard content of hydraulic compounds of 67% C3S and 67% C3S.
Finely ground with 9% 2S, 8% C3A, and 8% C4AF. Because it is a cement with high short-term strength, it is used for prestressed concrete, secondary cement products, winter construction, emergency construction, etc.
普通ポルトランドセメントは、水硬性化合物の標準的含
有量が、Ｃ３Ｓ５０％、Ｃ２Ｓ２６％、Ｃ３Ａ９％、Ｃ
，、ＡＦ ９％、で日本における生産量の約８６％が
この種類で一般コンクリート工事用として使用されてい
る。The standard content of hydraulic compounds in ordinary Portland cement is C3S 50%, C2S 26%, C3A 9%, C
,,AF 9%, and approximately 86% of the production in Japan is of this type and is used for general concrete work.
中庸熱ポルトランドセメントは、水硬性化合物が、Ｃ３
３４８％、Ｃ２Ｓ３０％、Ｃ３Ａ５％、ｃｌＡＦ １
１％で、これは、水和熱を小さくするためＣ３Ｓと０３
Ａを減じ、長期強度を発現するＣ２Ｓを多くしたセメン
トである。水和熱が小さいことから、ダム、地下構造物
などのコンクリート用のほか、道路舗装用としても用い
られる。Moderate heat Portland cement has a hydraulic compound of C3
348%, C2S30%, C3A5%, clAF 1
1%, which reduces the heat of hydration by combining C3S and 03
This is a cement with less A and more C2S, which develops long-term strength. Because of its low heat of hydration, it is used not only for concrete in dams and underground structures, but also for road paving.
第２段階の方法は、一定粉末度の混和材、−量的にフラ
イアッシュまたはガラス質高炉スラグの分量を変化させ
て行われた。The second stage of the process was carried out with a constant fineness of admixture - varying amounts of fly ash or vitreous blast furnace slag.
フライアッシュは微粉炭燃焼の火力発電所で、ボイラー
の燃焼ガス中の微粉炭灰を集じん機で捕集したもので、
融解して５〜２０ ｐ−ｍの大きさの球状粒子となって
いる。Fly ash is produced by collecting pulverized coal ash in the combustion gas of boilers in pulverized coal-burning thermal power plants using dust collectors.
It melts into spherical particles with a size of 5-20 p-m.
非結晶質で５ｉ０２ ４５％以上、プレーン比表面積で
２４００ｃｒｎ’／ｇ以上、強熱減量５％以下のものが
用いられ、単独では硬化性をもたないが、可溶性のＳ
ｉ ０２を多く含むため、Ｃａ（ＯＨ）２とポゾラン反
応をおこし、不溶性のＣ−３−Ｈゲルを生成する。Amorphous 5i02 of 45% or more, plain specific surface area of 2400 crn'/g or more, and ignition loss of 5% or less are used, and although they do not have curability alone, soluble S
Since it contains a large amount of i02, it causes a pozzolanic reaction with Ca(OH)2, producing an insoluble C-3-H gel.
また、ガラス質高炉スラグは、銑鉄を作るとき、鉄鉱石
、石灰石、コークスを高炉に交互に投入し、炉の下部か
ら熱い空気を吹き込むと、鉄鉱石中のＦｅ２Ｏ３は還元
されてＦｅとなり、鉄鉱石中のＳ ｉ ０２、ＡＱ２０
３などは石灰石のＣａＯと反応し１２００〜１４００℃
で融解して、スラグとなる。このように生成したスラグ
はできるかぎり高温のうちに水によって急冷すると、１
〜５ｍｍの大きさの粒状になる。これがガラス質高炉ス
ラグである。In addition, when making pig iron, vitreous blast furnace slag is produced by alternately charging iron ore, limestone, and coke into a blast furnace, and blowing hot air from the bottom of the furnace. Fe2O3 in the iron ore is reduced to Fe, and iron ore is Ishinaka S i 02, AQ20
3 etc. react with CaO of limestone and reach 1200-1400℃
It melts and becomes slag. When the slag produced in this way is quenched with water at the highest possible temperature, it becomes 1
It becomes granular with a size of ~5 mm. This is vitreous blast furnace slag.
このような処理によるスラグは潜在水硬性を持つように
なり、アルカリや硫酸塩などの刺激剤と作用して、水硬
性があられれる。成分的には、塩基度（ＣａＯ＋ Ｍｇ
Ｏ＋Ａｕ２０３ ／５ｉ０２）が１．４以上、Ｍｇ０１
０％以下、強熱減量３％以下のものが用いられる。The slag resulting from such treatment has latent hydraulic properties, and its hydraulic properties are reduced by interaction with irritants such as alkalis and sulfates. In terms of components, basicity (CaO + Mg
O+Au203/5i02) is 1.4 or more, Mg01
0% or less and a loss on ignition of 3% or less is used.
第２表で説明すると、同じ圧縮強さを確保するために、
ガラス質高炉スラグの分量はフライアッシュの分量より
非常に多くできる。この理由は、水利して硬化するメカ
ニズムがガラス質高炉スラグの場合は、潜在水硬性によ
るものに対して、フライアッシュはポゾラン反応による
からである。Explaining in Table 2, in order to ensure the same compressive strength,
The amount of vitreous blast furnace slag can be much larger than the amount of fly ash. The reason for this is that, in the case of glassy blast furnace slag, the mechanism of hardening through water utilization is due to latent hydraulic properties, whereas in the case of fly ash, it is due to a pozzolanic reaction.
ガラス質高炉スラグは、分量の少ないものは、普通ポル
トランドセメントとほぼ同じ使い方をし、分量の多いも
のは、ダム、河川、港湾など主として土木関係に用いら
れている。Glassy blast furnace slag is used in small amounts in almost the same way as ordinary Portland cement, while larger amounts are mainly used in civil engineering applications such as dams, rivers, and ports.
フライアッシュは全般的にダム工事をはじめ一般の土木
建築工事に用いられている。いずれも、水和熱の小さい
セメントは強度が低い傾向にある。Fly ash is generally used in general civil engineering construction work including dam construction. In both cases, cement with a low heat of hydration tends to have low strength.
ガラス質高炉スラグを配合したセメントは、水利熱／圧
縮強さ比が小さくセメントの性質上良い方にむいている
。しかし、これで充分とはいえず問題を残している。Cement containing vitreous blast furnace slag has a low water utilization/compressive strength ratio, making it suitable for cement properties. However, this is not enough and problems remain.
発明が解決しようとする課題
従来の方法で実施した場合は、ポルトランドセメントお
よび混和材の特性もあるが、水和熱を小さくすれば強度
は低く、強度を高くすれば水和熱が大きくなる傾向は避
けられず、前者の場合マスコン構造物の工期の長期化、
後者の場合熱膨張によるクラックなどの現象がみられた
。これらを解決するため、水和熱が小さく強度の高い、
すなわち、水和熱が小さく、水利熱／圧縮強さ比が小さ
いセメントを製造する必要がある。Problems to be Solved by the Invention When carried out using the conventional method, due to the characteristics of Portland cement and admixtures, the lower the heat of hydration, the lower the strength, and the higher the strength, the higher the heat of hydration tends to be. is unavoidable; in the former case, the construction period for the mass control structure will be prolonged;
In the latter case, phenomena such as cracks due to thermal expansion were observed. In order to solve these problems, we developed a product with low heat of hydration and high strength.
That is, it is necessary to produce cement that has a low heat of hydration and a low water heat/compressive strength ratio.
本発明はガラス質高炉スラグの粉末度及びポルトランド
セメントへの配合率を変えることにより、上記課題を解
決したものである。The present invention solves the above problems by changing the fineness of the vitreous blast furnace slag and its blending ratio in Portland cement.
ｉ１９を解決するための手段
本発明は、ガラス質高炉スラグの粉末度をブレーン比表
面積テ３，０００〜１０，０００ｃｒｎ’／ｇとし、各
種ポルトランドセメントへの配合率を４０〜９０％とす
ることを特徴とするセメントの水利熱および強度の比を
調整する方法、である。Means for Solving Problem i19 The present invention is to set the fineness of the vitreous blast furnace slag to a Blaine specific surface area of 3,000 to 10,000 crn'/g, and to set the blending ratio in various types of Portland cement to 40 to 90%. A method for adjusting the ratio of water utilization and strength of cement, characterized by:
本発明において、特にガラス質高炉スラグの粉末度およ
び各種ポルトランドセメントへの配合割合について限定
した理由については、次の通りである。In the present invention, the reason why the fineness of the vitreous blast furnace slag and the proportion of the vitreous blast furnace slag in particular are limited are as follows.
一般にガラス質高炉スラグの使用効果は、配合率４０％
未満では、水和熱の低減に効果はなく、これを超えて、
大きくなるほど顕著となる。しかし、９０％を超えると
、強度が発現しにくく、従って、養生その他で特別の水
利促進の手段が必要となる。In general, the effect of using vitreous blast furnace slag is a blending ratio of 40%.
Below this, there is no effect in reducing the heat of hydration;
The larger the size, the more noticeable it becomes. However, if it exceeds 90%, it is difficult to develop strength, and therefore, special means of promoting water use such as curing are required.
粉末度については、ブレーン比表面積３０００ｃｍ２／
ｇ未満では実用上の強度が維持しにくく、 １００００
ｃｍ’／ｇを超えると、水利反応がはや過ぎコンクリー
トにしたとき、練混ぜ、輸送が困難になる。Regarding fineness, Blaine specific surface area 3000cm2/
If it is less than 10,000 g, it is difficult to maintain practical strength.
If it exceeds cm'/g, the water utilization reaction will be too rapid, making it difficult to mix and transport concrete.
ガラス質高炉のスラグの粉末度を上記範囲において任意
に変え、各種ポルトランドセメントへの配合分量を変化
させることにより、用途に応じ経済的に水和熱／圧縮強
さ比の小さい理想的なセメントの製造が可能となった。By arbitrarily changing the fineness of vitreous blast furnace slag within the above-mentioned range and changing the amount of blending into various types of Portland cement, it is possible to create an ideal cement with a low heat of hydration/compressive strength ratio, depending on the application. Manufacture has become possible.
実施例 以下本発明を第３表に基づき説明する。Example The present invention will be explained below based on Table 3.
実施例１
（イ）ベース普通ポルトランドセメントは、ブレーン比
表面積３５００ｃｒｎ”／ｇ、ガラス質高炉スラグはブ
レーン比表面積３０００．４０００．６０００．９００
０ｃｍ２／ｇに実機ミルで粉砕し、分量は４０％、５０
％、６０％、７０％に配合したものの試験データである
。Example 1 (a) The base ordinary Portland cement has a Blaine specific surface area of 3500 crn''/g, and the vitreous blast furnace slag has a Blaine specific surface area of 3000.4000.6000.900.
Grinded to 0cm2/g using an actual mill, the amount is 40%, 50%
%, 60%, and 70%.
たとえば、ガラス質高炉スラグのブレーン比表面３００
０ｃｒｒ／ｇは、分量７０％で中庸熱ポルトランドセメ
ントと同じ水和熱（７日６６ｃａｌ／ｇ 、 ２８日７
５ｃａ Ｉ／ｇ）、圧縮強さは早強ポルトランドセメン
トと同じ強さ（３日２４５ｋｇｆ／ｃｎ＋２．７日３７
０ｋｇｆ／ｃｍ２２８日５９０ｋｇｆ／Ｃｍ２）となり
、水和熱／圧縮強さ比７日０．１７５７．２８日０．１
３３１１と小さいセメントの製造ができる。理由は、ガ
ラス質高炉スラグの粉末度を大きくすることにより、圧
縮強さは高くなるが水利熱は、さほど大きくならなず、
スラグの配合量が多くなっても圧縮強さはあまり変わら
ず、水和熱が小さくなるためである。For example, the Blaine ratio surface of vitreous blast furnace slag 300
0 crr/g is the same heat of hydration as medium-heat Portland cement at 70% content (66 cal/g for 7 days, 7 days for 28
5ca I/g), compressive strength is the same as early strength Portland cement (3 days 245 kgf/cn + 2.7 days 37
0kgf/cm228 days 590kgf/Cm2), heat of hydration/compressive strength ratio 7 days 0.1757.28 days 0.1
Can produce cement as small as 3311. The reason is that by increasing the fineness of the vitreous blast furnace slag, the compressive strength increases, but the water utilization does not increase so much.
This is because the compressive strength does not change much even if the amount of slag added increases, and the heat of hydration decreases.
実施例２
（ロ）ベース中庸熱ポルトランドセメントの場合、ベー
スをブレーン比表面積３５ＱＯｃｍ２／ｇにし、ガラス
質高炉スラグはブレーン比表面積３０００．４０００．
６０００．９０００ｃｒｎ’／ｇに粉砕し、分量は６０
％、７０％に配合したものの試験データーである。Example 2 (b) In the case of base moderate heat Portland cement, the base has a Blaine specific surface area of 35QOcm2/g, and the glassy blast furnace slag has a Blaine specific surface area of 3000.4000.
Pulverized to 6000.9000 crn'/g, amount is 60
%, test data of 70%.
ここで注目すべきことは、第１表、第２表に示すごとく
、第１、第２段階の方法では、水和熱２８日が７０〜７
７ｃａｌ／ｇ 、 どなると圧縮強さ２８日は３０４
〜３Ｅ１８ｋｇｆ／ｃｍ２、水和熱／圧縮強さ比２８日
ｏ、１９４４〜０．２０９２であるが、本発明では、水
和熱２８日８５ｃａｌ／ｇで圧縮強さ２８日４５３ｋｇ
ｆ／ｃｍ２、水和熱／圧縮強さ比２８日０．１４３５を
達成できたことである。What should be noted here is that, as shown in Tables 1 and 2, in the methods of the first and second stages, the heat of hydration on the 28th day is 70 to 70 days.
7cal/g, compressive strength 28 days is 304
~3E18 kgf/cm2, heat of hydration/compressive strength ratio 28 days o, 1944 ~ 0.2092, but in the present invention, heat of hydration 28 days 85 cal/g and compressive strength 28 days 453 kg
f/cm2 and heat of hydration/compressive strength ratio of 0.1435 in 28 days.
実施例３
（ハ）ベース早強ポルトランドセメントの場合、ベース
をブレーン比表面積３９００ｃｒｎ’／ｇにし、ガラス
質高炉スラグのブレーン比表面積は、４０００．６００
０．９００（ｌｃボ／ｇとし、分量５０％、９０％、７
０％、９０％に配合したものの試験データーである。Example 3 (c) In the case of base early strength Portland cement, the base has a Blaine specific surface area of 3900 crn'/g, and the Blaine specific surface area of vitreous blast furnace slag is 4000.600.
0.900 (LC volume/g, amount 50%, 90%, 7
This is test data for 0% and 90% blends.
ここで注目すべきことは、第１表、第２表に示すごとく
、第１、第２段階の方法では、圧縮強さ２８日 ４３３
〜４３８ｋｇｆ／ｃｍ２となると水利熱２８日は８５〜
１０１ｃａｌ／ｇ、水利熱／圧縮強さ比２８日０．１９
８３〜０．２３０６であるが、本発明では、圧縮強さ２
８日５３０ｋｇｆ／ｃｍ２で水和熱２８日７５ｃａｌ／
ｇ 、水和熱／圧縮強さ比２８日０．１４１５を達成で
きたことである。What should be noted here is that, as shown in Tables 1 and 2, in the first and second stage methods, the compressive strength was 28 days 433
〜438kgf/cm2, water use heat 28th is 85〜
101 cal/g, water utilization heat/compressive strength ratio 28 days 0.19
83 to 0.2306, but in the present invention, the compressive strength is 2
8 days 530 kgf/cm2 and hydration heat 28 days 75 cal/
g, a heat of hydration/compressive strength ratio of 0.1415 for 28 days was achieved.
なお、試験方法は、日本工業規格ＪＩＳ Ｒ５２０１゜
ＪＩＳ Ｒ５２０３に順じている。The test method is in accordance with Japanese Industrial Standards JIS R5201 and JIS R5203.
以上の結果に基づき、大幅な水和熱と強度のコントロー
ルができる。Based on the above results, the heat of hydration and strength can be significantly controlled.
０
Ｉ５
発明の効果
ガラス質高炉スラブの粉末度を任意に変え、各種ポルト
ランドセメントへの配合分量を変化させることにより、
用途に応じ経済的に水利熱／圧縮強さ比の小さい理想的
なセメントの製造が可能となった。0 I5 Effects of the invention By arbitrarily changing the fineness of the vitreous blast furnace slab and changing the amount added to various types of Portland cement,
It has become possible to economically produce ideal cement with a low water/heat/compressive strength ratio depending on the application.
Claims (1)
０００〜１０，０００ｃｍ＾２／ｇ（石膏添加５％以下
）とし、各種ポルトランドセメントへの配合率を４０〜
９０％とすることを特徴としセメントの水和熱（ｃａｌ
／ｇ）と圧縮強さ（ｋｇｆ／ｃｍ＾２）の比を７日で０
．４３〜０．１３、２８日で０．２４〜０．１まで調整
する方法。The fineness of vitreous blast furnace slag is 3 in terms of Blaine specific surface area.
000 to 10,000 cm^2/g (with 5% or less of gypsum added), and the blending rate to various Portland cements is 40 to 10,000 cm^2/g
The heat of hydration (cal) of cement is 90%.
/g) and compressive strength (kgf/cm^2) in 7 days.
．． 43 to 0.13, how to adjust to 0.24 to 0.1 in 28 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1201230A JPH0369534A (en) | 1989-08-04 | 1989-08-04 | Method for regulating ratio of both heat of hydration and strength of cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1201230A JPH0369534A (en) | 1989-08-04 | 1989-08-04 | Method for regulating ratio of both heat of hydration and strength of cement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0369534A true JPH0369534A (en) | 1991-03-25 |
Family
ID=16437493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1201230A Pending JPH0369534A (en) | 1989-08-04 | 1989-08-04 | Method for regulating ratio of both heat of hydration and strength of cement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0369534A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003003303A (en) * | 2001-06-20 | 2003-01-08 | Keiko Suzuki | Wrap skirt, coat, and coat set each for kimono |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5767051A (en) * | 1980-10-06 | 1982-04-23 | Onoda Cement Co Ltd | Hydraulic composition |
| JPS61242942A (en) * | 1985-04-18 | 1986-10-29 | 第一セメント株式会社 | Manufacture of high strength concrete and mortar |
| JPS6374943A (en) * | 1986-09-19 | 1988-04-05 | 日本鋼管株式会社 | Cement composition |
| JPH0297441A (en) * | 1988-10-05 | 1990-04-10 | Onoda Cement Co Ltd | Mixed cement |
| JPH02175636A (en) * | 1988-12-27 | 1990-07-06 | Mitsubishi Mining & Cement Co Ltd | Heat-treating method of granulated blastfurnace slag and low heat cement |
-
1989
- 1989-08-04 JP JP1201230A patent/JPH0369534A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5767051A (en) * | 1980-10-06 | 1982-04-23 | Onoda Cement Co Ltd | Hydraulic composition |
| JPS61242942A (en) * | 1985-04-18 | 1986-10-29 | 第一セメント株式会社 | Manufacture of high strength concrete and mortar |
| JPS6374943A (en) * | 1986-09-19 | 1988-04-05 | 日本鋼管株式会社 | Cement composition |
| JPH0297441A (en) * | 1988-10-05 | 1990-04-10 | Onoda Cement Co Ltd | Mixed cement |
| JPH02175636A (en) * | 1988-12-27 | 1990-07-06 | Mitsubishi Mining & Cement Co Ltd | Heat-treating method of granulated blastfurnace slag and low heat cement |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003003303A (en) * | 2001-06-20 | 2003-01-08 | Keiko Suzuki | Wrap skirt, coat, and coat set each for kimono |
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