JP2018112518A - Activity estimation method for mixed material for cement, activity estimation device, and preparation method of mixed cement - Google Patents
Activity estimation method for mixed material for cement, activity estimation device, and preparation method of mixed cement Download PDFInfo
- Publication number
- JP2018112518A JP2018112518A JP2017004434A JP2017004434A JP2018112518A JP 2018112518 A JP2018112518 A JP 2018112518A JP 2017004434 A JP2017004434 A JP 2017004434A JP 2017004434 A JP2017004434 A JP 2017004434A JP 2018112518 A JP2018112518 A JP 2018112518A
- Authority
- JP
- Japan
- Prior art keywords
- cement
- activity
- mixed
- sample
- activity index
- 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
Landscapes
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
Description
本発明は、セメント用混合材の活性度推定方法、活性度推定装置および混合セメントの製造方法に関するものである。 The present invention relates to an activity estimation method, an activity estimation apparatus, and a mixed cement manufacturing method for a cement mixed material.
従来、セメントに混合する混合材の活性度指数はＪＩＳ規格に準じて算定している。例えば高炉スラグ微粉末の場合は、ＪＩＳ Ａ ６２０６「コンクリート用高炉スラグ微粉末」に準じて、基準用普通ポルトランドセメントに対し５０％高炉スラグ微粉末を置換して、材齢２８日および９１日の強度への寄与率として、次式［１］で算定する。また、フライアッシュの場合は、ＪＩＳ Ａ ６２０１「コンクリート用フライアッシュ」に準じて、基準用普通ポルトランドセメントに対して２５％フライアッシュを置換して、材齢２８日および９１日の強度への寄与率として、次式［１］で算定する。 Conventionally, the activity index of a mixed material mixed with cement is calculated according to JIS standards. For example, in the case of blast furnace slag fine powder, 50% blast furnace slag fine powder is replaced with reference standard Portland cement according to JIS A 6206 “Blast furnace slag fine powder for concrete”, and ages 28 days and 91 days are used. The contribution rate to strength is calculated by the following formula [1]. In the case of fly ash, in accordance with JIS A 6201 “Fly ash for concrete”, 25% fly ash is substituted for normal portland cement for reference, contributing to the strength of ages 28 days and 91 days. The rate is calculated by the following equation [1].
Ａｓ＝Ｃ２／Ｃ１×１００ 式［１］
ここに、Ａｓ：各材齢の活性度指数（％）
Ｃ１：各材齢における基準モルタルの圧縮強度（Ｎ／ｍｍ2）
Ｃ２：各材齢における試験モルタルの圧縮強度（Ｎ／ｍｍ2）
As = C2 / C1 × 100 Formula [1]
Where As: Activity index of each age (%)
C1: Compressive strength of standard mortar at each age (N / mm 2 )
C2: Compressive strength of test mortar at each age (N / mm 2 )
上記の式［１］で求めた活性度指数を基に、混合材の規格値と照らし合わせ、混合材が規格値に合致しているかどうかが判断されるが、その際、図７に示すように、所定の型枠を準備して、２ｋｇ程度のセメントを使用し、その３倍の量の標準砂と共に練混ぜ、打込みを行う必要がある。また、所定の２８日、９１日材齢まで、２０℃の水中で養生を行うことが必要であり、試験体の圧縮試験時の研磨や圧縮試験も考慮すると、人工や時間が大幅にかかることが問題である。例えば、１０水準の活性度試験を行うとなると、試験終了までに人工を含めて多額の費用が掛かることが一般的である。 Based on the activity index obtained by the above equation [1], it is judged whether or not the mixed material matches the standard value by comparing with the standard value of the mixed material, as shown in FIG. In addition, it is necessary to prepare a predetermined formwork, use about 2 kg of cement, knead together with three times the amount of standard sand, and perform driving. In addition, it is necessary to carry out curing in water at 20 ° C until the predetermined age of 28 days and 91 days. Considering polishing and compression tests during the compression test of the specimen, it takes a lot of man-hours and time. Is a problem. For example, when a 10-level activity test is performed, a large amount of cost is generally required including the artificial one before the end of the test.
また、混合材の化学成分がわかっている場合、高炉スラグ微粉末の場合は塩基度［（ＣａＯ＋Ａｌ2Ｏ3＋ＭｇＯ）／ＳｉＯ2］、フライアッシュの場合はＭ値［（ＣａＯ＋ＭｇＯ＋Ｒ2Ｏ）／ＳｉＯ2］と呼ばれる値が活性度指数とある程度の相関があることが報告されているが（例えば、特許文献１、２を参照）、これらの数値は、大変煩雑な元素分析を行う必要があり、例えば検量線の作製が難しいことや、装置の価格が高額であることが問題である。 When the chemical composition of the mixed material is known, basicity [(CaO + Al 2 O 3 + MgO) / SiO 2 ] in the case of blast furnace slag fine powder, and M value [(CaO + MgO + R 2 O) / SiO in the case of fly ash. 2 ] has been reported to have a certain degree of correlation with the activity index (see, for example, Patent Documents 1 and 2), but these numerical values need to be subjected to very complicated elemental analysis, For example, it is a problem that it is difficult to produce a calibration curve and the price of the apparatus is high.
このため、この活性度指数を簡易かつ精度よく推定することのできる方法が望まれていた。 For this reason, a method capable of simply and accurately estimating the activity index has been desired.
本発明は、上記に鑑みてなされたものであって、活性度指数を簡易かつ精度よく推定することのできるセメント用混合材の活性度推定方法、活性度推定装置および混合セメントの製造方法を提供することを目的とする。 The present invention has been made in view of the above, and provides an activity estimation method, an activity estimation device, and a mixed cement production method for a cement mixture capable of easily and accurately estimating an activity index. The purpose is to do.
上記した課題を解決し、目的を達成するために、本発明に係るセメント用混合材の活性度推定方法は、セメントに混合して用いられる混合材の活性度指数を推定する方法であって、セメントと混合材と反応活性剤とを混合し、所定の水粉体比で水と混ぜて試料を作製するステップと、反応を促進したい所定の促進温度の下で試料の積算発熱量を測定するステップと、測定した試料の積算発熱量と、あらかじめ把握してある試料の積算発熱量と混合材の活性度指数の関係に基づいて、混合材の活性度指数を推定するステップとを備えることを特徴とする。 In order to solve the above-described problems and achieve the object, the method for estimating the activity of the cement mixture according to the present invention is a method for estimating the activity index of the mixture used by mixing with cement, Mixing cement, mixed material and reaction activator, mixing with water at a predetermined water powder ratio to prepare a sample, and measuring the accumulated calorific value of the sample at a predetermined acceleration temperature at which the reaction is to be promoted And a step of estimating the activity index of the mixed material based on the relationship between the measured cumulative calorific value of the sample and the relationship between the cumulative calorific value of the sample and the activity index of the mixed material, which has been grasped in advance. Features.
また、本発明に係る他のセメント用混合材の活性度推定方法は、上述した発明において、促進温度を３０〜６０℃の間の一定温度としたことを特徴とする。 Moreover, the activity estimation method of the other cement mixing material according to the present invention is characterized in that, in the above-described invention, the accelerating temperature is set to a constant temperature of 30 to 60 ° C.
また、本発明に係る他のセメント用混合材の活性度推定方法は、上述した発明において、水粉体比を０．６としたことを特徴とする。 Moreover, the activity estimation method of the other cement mixing material according to the present invention is characterized in that, in the above-described invention, the water powder ratio is set to 0.6.
また、本発明に係るセメント用混合材の活性度推定装置は、セメントに混合して用いられる混合材の活性度指数を推定する装置であって、セメントと混合材と反応活性剤と水とを所定の水粉体比で混合してなる試料の積算発熱量を、反応を促進したい所定の促進温度の下で測定する測定手段と、測定された試料の積算発熱量と、あらかじめ把握してある試料の積算発熱量と混合材の活性度指数の関係に基づいて、混合材の活性度指数を推定する推定手段とを備えることを特徴とする。 Further, an activity estimation apparatus for a cement mixture according to the present invention is an apparatus for estimating an activity index of a mixture used by mixing with cement, and comprises cement, a mixture, a reaction activator, and water. Measurement means for measuring the total calorific value of the sample mixed at a predetermined water powder ratio at a predetermined acceleration temperature at which the reaction is to be promoted and the cumulative calorific value of the measured sample are known in advance. And an estimation means for estimating the activity index of the mixed material based on the relationship between the accumulated calorific value of the sample and the activity index of the mixed material.
また、本発明に係る他のセメント用混合材の活性度推定装置は、上述した発明において、促進温度を３０〜６０℃の間の一定温度としたことを特徴とする。 Moreover, the activity estimation apparatus of the other cement-mixing material according to the present invention is characterized in that, in the above-described invention, the accelerating temperature is a constant temperature between 30 and 60 ° C.
また、本発明に係る他のセメント用混合材の活性度推定装置は、上述した発明において、水粉体比を０．６としたことを特徴とする。 Moreover, the activity estimation apparatus of the other cement-mixing material according to the present invention is characterized in that, in the above-described invention, the water powder ratio is set to 0.6.
また、本発明に係る混合セメントの製造方法は、上述したセメント用混合材の活性度推定方法を用いて推定された混合材の活性度指数に基づいて混合材を選択し、選択した混合材とセメントとを混合して混合セメントを製造することを特徴とする。 Moreover, the manufacturing method of the mixed cement which concerns on this invention selects a mixed material based on the activity index of the mixed material estimated using the activity estimation method of the cement mixed material mentioned above, and the selected mixed material and A mixed cement is produced by mixing with cement.
本発明に係るセメント用混合材の活性度推定方法によれば、セメントに混合して用いられる混合材の活性度指数を推定する方法であって、セメントと混合材と反応活性剤とを混合し、所定の水粉体比で水と混ぜて試料を作製するステップと、反応を促進したい所定の促進温度の下で試料の積算発熱量を測定するステップと、測定した試料の積算発熱量と、あらかじめ把握してある試料の積算発熱量と混合材の活性度指数の関係に基づいて、混合材の活性度指数を推定するステップとを備えるので、活性度指数を簡易かつ精度よく推定することができるという効果を奏する。 According to the activity estimation method for a cement mixture according to the present invention, a method for estimating an activity index of a mixture used by mixing with cement, the cement, the mixture, and a reaction activator are mixed. A step of preparing a sample by mixing with water at a predetermined water powder ratio, a step of measuring an integrated calorific value of the sample under a predetermined acceleration temperature at which the reaction is to be promoted, an integrated calorific value of the measured sample, Since the step of estimating the activity index of the mixed material based on the relationship between the accumulated calorific value of the sample and the activity index of the mixed material, which is grasped in advance, is provided, the activity index can be estimated easily and accurately. There is an effect that can be done.
また、本発明に係る他のセメント用混合材の活性度推定方法によれば、促進温度を３０〜６０℃の間の一定温度としたので、試料の水和反応を効果的に活性化することができるという効果を奏する。 In addition, according to the activity estimation method for another cement mixture according to the present invention, the accelerated temperature is set to a constant temperature between 30 to 60 ° C., so that the hydration reaction of the sample can be effectively activated. There is an effect that can be.
また、本発明に係る他のセメント用混合材の活性度推定方法によれば、水粉体比を０．６としたので、試料の水和反応を効果的に活性化することができるという効果を奏する。 Moreover, according to the activity estimation method of the other cement-mixing material according to the present invention, since the water powder ratio is set to 0.6, the effect that the hydration reaction of the sample can be effectively activated. Play.
また、本発明に係るセメント用混合材の活性度推定装置によれば、セメントに混合して用いられる混合材の活性度指数を推定する装置であって、セメントと混合材と反応活性剤と水とを所定の水粉体比で混合してなる試料の積算発熱量を、反応を促進したい所定の促進温度の下で測定する測定手段と、測定された試料の積算発熱量と、あらかじめ把握してある試料の積算発熱量と混合材の活性度指数の関係に基づいて、混合材の活性度指数を推定する推定手段とを備えるので、活性度指数を簡易かつ精度よく推定することができるという効果を奏する。 Further, according to the activity estimation device for a cement mixed material according to the present invention, the device estimates the activity index of the mixed material used by mixing with cement, and includes cement, the mixed material, the reactive activator, and water. The measurement calorific value of the sample that is mixed at a predetermined water-powder ratio is measured in advance at a predetermined acceleration temperature at which the reaction is to be promoted, and the accumulated calorific value of the measured sample is determined in advance. And an estimation means for estimating the activity index of the mixed material based on the relationship between the accumulated calorific value of the sample and the activity index of the mixed material, so that the activity index can be estimated easily and accurately There is an effect.
また、本発明に係る他のセメント用混合材の活性度推定装置によれば、促進温度を３０〜６０℃の間の一定温度としたので、試料の水和反応を効果的に活性化することができるという効果を奏する。 Moreover, according to the activity estimation apparatus of the other cement-mixing material according to the present invention, since the accelerating temperature is set to a constant temperature between 30 to 60 ° C., the sample hydration reaction can be effectively activated. There is an effect that can be.
また、本発明に係る他のセメント用混合材の活性度推定装置によれば、水粉体比を０．６としたので、試料の水和反応を効果的に活性化することができるという効果を奏する。 Moreover, according to the activity estimation apparatus for another cement-mixing material according to the present invention, since the water powder ratio is set to 0.6, the effect that the hydration reaction of the sample can be effectively activated. Play.
また、本発明に係る混合セメントの製造方法によれば、セメント用混合材の活性度推定方法を用いて推定された混合材の活性度指数に基づいて混合材を選択し、選択した混合材とセメントとを混合して混合セメントを製造するので、強度発現性に優れた混合セメントを製造することができるという効果を奏する。 Further, according to the method for producing a mixed cement according to the present invention, the mixture is selected based on the activity index of the mixture estimated using the activity estimation method of the cement mixture, and the selected mixture and Since mixed cement is manufactured by mixing with cement, it is possible to manufacture a mixed cement having excellent strength development.
以下に、本発明に係るセメント用混合材の活性度推定方法、活性度推定装置および混合セメントの製造方法の実施の形態を図面に基づいて詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。 Hereinafter, embodiments of an activity estimation method, an activity estimation device, and a mixed cement manufacturing method according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.
（セメント用混合材の活性度推定方法）
まず、本発明に係るセメント用混合材の活性度推定方法の実施の形態について説明する。図１に示すように、本発明は、ステップＳ１〜Ｓ３のフローにより実施される。
(Activity estimation method for cement mixture)
First, an embodiment of an activity estimation method for a cement-mixing material according to the present invention will be described. As shown in FIG. 1, the present invention is implemented by the flow of steps S1 to S3.
まず、ステップＳ１において、セメントと混合材からなる混合材料に対して所定の質量％の反応活性剤（例えば１０％のＣａ（ＯＨ）2粉体など）を混合した試験粉末を用意する。続いて、この試験粉末を所定の水粉体比（例えば０．６程度）で水と混合した試料を作製する。 First, in step S1, a test powder in which a predetermined mass% of a reactive activator (for example, 10% Ca (OH) 2 powder) is mixed with a mixed material made of cement and a mixed material is prepared. Subsequently, a sample is prepared by mixing the test powder with water at a predetermined water powder ratio (for example, about 0.6).
次に、ステップＳ２において、反応の促進を目的に、所定の養生温度（例えば５０℃）で定温測定が可能な伝導熱量計に上記の試料をセットし、所定の材齢まで水和発熱量（積算発熱量）を測定する。 Next, in step S2, for the purpose of promoting the reaction, the above sample is set in a conduction calorimeter capable of constant temperature measurement at a predetermined curing temperature (for example, 50 ° C.), and the hydration calorific value (until the predetermined age) Measure the total calorific value).
図２は、普通ポルトランドセメントに対し高炉スラグ微粉末（ＢＦＳ）を４０％置換した混合セメントペーストの材齢と積算発熱量の関係を、１０〜６０℃の温度ごとに示したものである。この図に示すように、例えば養生温度５０℃を促進温度とした場合には、養生温度２０℃では７日要した反応を、わずか１日程度に短縮できる可能性があることがわかる。また、本発明の促進温度は５０℃に限るものではなく、反応を促進したい度合に応じて例えば３０〜６０℃の促進温度としても良いが、比較する際には同じ温度で促進養生したものを用いる。 FIG. 2 shows the relationship between the age of the mixed cement paste obtained by substituting 40% of blast furnace slag fine powder (BFS) for ordinary Portland cement and the cumulative calorific value for each temperature of 10 to 60 ° C. As shown in this figure, for example, when the curing temperature of 50 ° C. is set as the accelerating temperature, it can be seen that the reaction that took 7 days at the curing temperature of 20 ° C. may be shortened to only about 1 day. Further, the acceleration temperature of the present invention is not limited to 50 ° C., and may be an acceleration temperature of 30 to 60 ° C., for example, depending on the degree of the reaction to be accelerated. Use.
次に、ステップＳ３において、あらかじめ把握してある試料の積算発熱量と活性度指数の関係を用いて、活性度指数を算定する。この関係としては、例えば図３、図４に例示するような積算発熱量（ｘ）、活性度指数（ｙ）の関数式で表される回帰式を用いることができる。なお、この回帰式は後述する実験により得られている。 Next, in step S3, the activity index is calculated using the relationship between the accumulated calorific value of the sample and the activity index that has been grasped in advance. As this relationship, for example, a regression equation represented by a functional expression of an integrated calorific value (x) and an activity index (y) as exemplified in FIGS. 3 and 4 can be used. This regression equation is obtained by an experiment described later.
例えば、材齢２８日における高炉スラグ微粉末の活性度指数を推定したい場合には、材齢１日の試料の積算発熱量を図３の回帰式に代入して活性度指数を算定すればよい。材齢９１日における高炉スラグ微粉末の活性度指数を推定したい場合には、材齢７日の試料の積算発熱量を図３の回帰式に代入して活性度指数を算定すればよい。フライアッシュの場合も同様に、図４の回帰式を用いて所定の材齢の活性度指数を推定すればよい。このようにすることで、混合材の活性度指数を簡易かつ精度よく推定することができる。 For example, when it is desired to estimate the activity index of blast furnace slag fine powder at the age of 28 days, the activity index may be calculated by substituting the accumulated calorific value of the sample at the age of 1 day into the regression equation of FIG. . When it is desired to estimate the activity index of the blast furnace slag fine powder at the age of 91 days, the activity index may be calculated by substituting the integrated calorific value of the sample at the age of 7 days into the regression equation of FIG. Similarly, in the case of fly ash, the activity index of a predetermined age may be estimated using the regression equation of FIG. By doing in this way, the activity index of a mixed material can be estimated simply and accurately.
なお、既往の研究において、活性度指数と相関が高いと報告されている塩基度（Ｂａｓｉｃｉｔｙ）とＭ値と、高炉スラグ微粉末およびフライアッシュの活性度指数の関係を図５、図６にそれぞれ示すが、本発明の方法と比較すると、既往の算定方法は本発明の方法よりも精度が悪いことが確認できる。 The relationship between basicity (basicity) and M value, which are reported to have a high correlation with the activity index in past studies, and the activity index of blast furnace slag fine powder and fly ash are shown in FIGS. 5 and 6, respectively. As shown, when compared with the method of the present invention, it can be confirmed that the existing calculation method has a lower accuracy than the method of the present invention.
また、上記の実施の形態において、混合材が高炉スラグ微粉末の場合とフライアッシュの場合を例にとり説明したが、本発明はこれらの材料に限るものではなく、セメント混合用の様々な混合材に適用することが可能である。 In the above embodiment, the case where the mixed material is blast furnace slag fine powder and the case of fly ash has been described as an example, but the present invention is not limited to these materials, and various mixed materials for cement mixing It is possible to apply to.
（確認実験）
次に、本発明の作用効果を確認するために行った確認実験について説明する。
(Confirmation experiment)
Next, a confirmation experiment performed for confirming the effect of the present invention will be described.
・使用材料
使用材料は、表１に示す１０種類の高炉スラグ微粉末、および、表２に示す１４種類のフライアッシュを用いた。高炉スラグ微粉末については、３０００、４０００、６０００の記号のものは日本のものを用い、その他の記号のものは、海外産のものである。フライアッシュについては、国や産地の異なる１４種類を用いた。表１には、高炉スラグ微粉末の化学組成からみた活性度の指標として用いられる、（ＣａＯ＋Ａｌ2Ｏ3＋ＭｇＯ）／ＳｉＯ2で示される塩基度（Ｂａｓｉｃｉｔｙ）を付記した。また、表２には、フライアッシュの化学組成からみた活性度の指標として下記の参考文献１等に提案されている、（ＣａＯ＋ＭｇＯ＋Ｒ2Ｏ）／ＳｉＯ2で示されるＭ値を付記した。
-Material used As the material used, 10 types of blast furnace slag fine powder shown in Table 1 and 14 types of fly ash shown in Table 2 were used. As for the blast furnace slag fine powder, Japanese, 3000, 4000, and 6000 symbols are from Japan, and other symbols are from overseas. For fly ash, 14 types with different countries and production areas were used. In Table 1, the basicity (Basicity) indicated by (CaO + Al 2 O 3 + MgO) / SiO 2 used as an index of activity viewed from the chemical composition of the blast furnace slag fine powder is added. In Table 2, the M value indicated by (CaO + MgO + R 2 O) / SiO 2 proposed in the following Reference 1 is added as an index of activity in terms of the chemical composition of fly ash.
・高炉スラグ微粉末の化学組成
・フライアッシュの化学組成
［参考文献１］ 大塚拓ほか：フライアッシュの鉱物組成とポゾラン反応性、セメント・コンクリート論文集、No.63、pp.16-21(2009) [Reference 1] Taku Otsuka et al .: Mineral composition and pozzolanic reactivity of fly ash, Proceedings of cement and concrete, No.63, pp.16-21 (2009)
・活性度試験
高炉スラグ微粉末の基準セメントに対する置換率は、ＪＩＳ Ａ ６２０６「コンクリート用高炉スラグ微粉末」に準じ、５０％とした。フライアッシュの基準セメントに対する置換率は、ＪＩＳ Ａ ６２０１「コンクリート用フライアッシュ」に準じ、２５％とした。ＪＩＳ Ｒ ５２０１に準じてモルタルを練混ぜ、φ５０×１００ｍｍの円柱型枠に打設した。材齢１日で脱型し、所定の材齢まで２０℃に管理された水中で養生を行い、圧縮強さの測定を行い、上記ＪＩＳ規格に準じて活性度指数を算定した。
Activity test The replacement rate of the blast furnace slag fine powder with respect to the reference cement was set to 50% in accordance with JIS A 6206 "Blast furnace slag fine powder for concrete". The replacement ratio of fly ash with respect to the reference cement was 25% in accordance with JIS A 6201 “Fly Ash for Concrete”. Mortar was kneaded in accordance with JIS R 5201 and placed in a cylindrical mold having a diameter of 50 × 100 mm. After demolding at a material age of 1 day, curing was performed in water controlled at 20 ° C. until a predetermined material age, compression strength was measured, and an activity index was calculated according to the JIS standard.
・伝導熱量計を用いた促進試験
混合材単体の促進試験を行う手法として、温度による促進、刺激剤（反応活性剤）による促進が考えられる。本検討では、促進温度を５０℃、刺激剤として水酸化カルシウムの粉体を用いることとした。
・ Acceleration test using conduction calorimeter As a method for conducting an acceleration test on a single mixed material, acceleration by temperature and acceleration by a stimulant (reactive activator) can be considered. In this study, the acceleration temperature was 50 ° C., and calcium hydroxide powder was used as the stimulant.
それぞれの混合セメントを１５ｇ計量し、内割で試薬特級の水酸化カルシウム粉体（和光純薬工業株式会社製）を１０％混合し、水セメント比０．６で練混ぜ、伝導熱量計（株式会社東京理工製）にセットし、５０℃定温時の水和発熱速度、積算発熱量を材齢７日まで測定した。材料の保管および練混ぜは、５０℃の恒温漕中で行い、素早く伝導熱量計にセットした。なお、促進温度を５０℃に選定した理由は、ＢＦＳ（高炉スラグ微粉末）を４０％置換した事前検討において、上記の図２に示した通り、２０℃養生における材齢７日の積算発熱量が、５０℃養生ではおおよそ１日の積算発熱量に相当することから、促進方法として適用できる可能性があると考えたためである。 15 g of each mixed cement is weighed, and 10% of reagent-grade calcium hydroxide powder (Wako Pure Chemical Industries, Ltd.) is mixed in the inner ratio, and kneaded at a water cement ratio of 0.6. The product was set in Tokyo Riko Co., Ltd., and the hydration heat generation rate and the integrated heat generation amount at a constant temperature of 50 ° C. were measured until the material age was 7 days. The material was stored and kneaded in a constant temperature bath at 50 ° C. and quickly set in a conduction calorimeter. The reason why the acceleration temperature was selected to be 50 ° C. was that, as shown in FIG. 2 above, in the preliminary examination in which 40% of BFS (blast furnace slag fine powder) was replaced, the accumulated calorific value at the age of 7 days in the curing at 20 ° C. However, since it is equivalent to the accumulated calorific value for one day in the curing at 50 ° C., it is considered that there is a possibility that it can be applied as a promotion method.
・結果
高炉スラグ微粉末、フライアッシュを使用した場合の活性度指数および促進試験における積算発熱量を表３、表４にそれぞれ示す。活性度指数と積算発熱量の関係および回帰式は上記の図３、図４に示した通りである。
・ Results Table 3 and Table 4 show the activity index and the accumulated calorific value in the accelerated test when blast furnace slag fine powder and fly ash are used, respectively. The relationship between the activity index and the integrated calorific value and the regression equation are as shown in FIGS.
・高炉スラグ微粉末を使用した場合の活性度指数および積算発熱量
・フライアッシュを使用した場合の活性度指数および積算発熱量
以上より、従来の方法と比較すると本発明は大変簡便な工程にも関わらず、化学組成の幅が広い混合材単体の活性度を簡易的に精度よく推定可能となり、人工や材料費の削減を実現することができる。 As described above, compared with the conventional method, the present invention makes it possible to easily and accurately estimate the activity of a single mixed material having a wide chemical composition range in spite of a very simple process, thereby reducing artificial and material costs. Can be realized.
（セメント用混合材の活性度推定装置）
次に、本発明に係るセメント用混合材の活性度推定装置の実施の形態について説明する。
(Activity estimation device for cement mixture)
Next, an embodiment of an activity estimation device for a cement-mixing material according to the present invention will be described.
本発明に係るセメント用混合材の活性度推定装置は、セメントに混合して用いられる混合材の活性度指数を推定する装置であって、測定手段と推定手段とを備えている。ここで、測定手段、推定手段は、本発明に係るセメント用混合材の活性度推定方法の各ステップに対応するものであるから、以下の説明では上記の推定方法において説明した内容と重複する内容については説明を省略する。 An activity estimation apparatus for a cement mixed material according to the present invention is an apparatus for estimating an activity index of a mixed material used by being mixed with cement, and includes a measuring means and an estimating means. Here, since the measurement means and the estimation means correspond to the respective steps of the cement mixture activity estimation method according to the present invention, the following description overlaps with the content described in the above estimation method. Description of is omitted.
測定手段は、セメントと混合材と反応活性剤と水とを所定の水粉体比で混合してなる試料の積算発熱量を、反応を促進したい所定の促進温度の下で測定するものである。この測定手段は、伝導熱量計により構成することができる。 The measuring means measures an integrated calorific value of a sample obtained by mixing cement, a mixture, a reaction activator, and water at a predetermined water powder ratio at a predetermined acceleration temperature at which the reaction is to be promoted. . This measuring means can be constituted by a conduction calorimeter.
推定手段は、測定された試料の積算発熱量と、あらかじめ把握してある試料の積算発熱量と混合材の活性度指数の関係に基づいて、混合材の活性度指数を推定する推定手段とを備えるものである。この推定手段としては、例えば所定の材齢における試料の積算発熱量と、所定の材齢における混合材の活性度指数の相関関係を表す情報があらかじめ格納されたデータベースまたはメモリと、このデータベースまたはメモリに格納された上記情報を読み出して、所定の材齢における混合材の活性度指数を推定する演算処理部を有するコンピュータとにより構成することができる。 The estimation means includes an estimated means for estimating the activity index of the mixed material based on the measured cumulative calorific value of the sample, and the relationship between the cumulative calorific value of the sample and the activity index of the mixed material, which has been grasped in advance. It is to be prepared. As this estimation means, for example, a database or memory in which information indicating the correlation between the cumulative calorific value of the sample at a predetermined age and the activity index of the mixed material at the predetermined age is stored in advance, and this database or memory The above information stored in the computer can be read out and a computer having an arithmetic processing unit for estimating the activity index of the mixed material at a predetermined age can be configured.
このように構成したセメント用混合材の活性度推定装置によれば、上記の活性度推定方法と同様に、混合材の活性度指数を簡易かつ精度よく推定することができる。 According to the cement estimation material activity estimation apparatus configured as described above, the activity index of the mixture material can be estimated easily and accurately in the same manner as the activity estimation method described above.
（混合セメントの製造方法）
次に、本発明に係る混合セメントの製造方法の実施の形態について説明する。
(Mixed cement production method)
Next, an embodiment of a method for producing a mixed cement according to the present invention will be described.
本発明に係る混合セメントの製造方法は、上記の活性度推定方法を用いて推定された混合材の活性度指数に基づいて混合材を選択し、選択した混合材とセメントとを混合して混合セメントを製造するものである。このようにすれば、活性度指数が推定された混合材の中から適切な活性度指数の混合材を用いることにより、例えば強度発現性に優れた混合セメントを製造することができる。 The method for producing a mixed cement according to the present invention selects a mixed material based on the activity index of the mixed material estimated using the activity estimation method, and mixes and mixes the selected mixed material and cement. Cement is manufactured. If it does in this way, the mixed cement excellent in intensity | strength expression can be manufactured, for example by using the mixed material of an appropriate activity index from the mixed materials in which the activity index was estimated.
以上説明したように、本発明に係るセメント用混合材の活性度推定方法によれば、セメントに混合して用いられる混合材の活性度指数を推定する方法であって、セメントと混合材と反応活性剤とを混合し、所定の水粉体比で水と混ぜて試料を作製するステップと、反応を促進したい所定の促進温度の下で試料の積算発熱量を測定するステップと、測定した試料の積算発熱量と、あらかじめ把握してある試料の積算発熱量と混合材の活性度指数の関係に基づいて、混合材の活性度指数を推定するステップとを備えるので、活性度指数を簡易かつ精度よく推定することができる。 As described above, according to the activity estimation method for a cement mixture according to the present invention, a method for estimating the activity index of a mixture used by mixing with cement, the cement reacts with the mixture. Mixing an activator and mixing with water at a predetermined water powder ratio to prepare a sample, measuring a cumulative calorific value of the sample at a predetermined acceleration temperature at which the reaction is desired to be accelerated, and measuring the sample And the step of estimating the activity index of the mixed material based on the relationship between the accumulated calorific value of the sample and the activity index of the mixed material that has been grasped in advance. It can be estimated with high accuracy.
また、本発明に係る他のセメント用混合材の活性度推定方法によれば、促進温度を３０〜６０℃の間の一定温度としたので、試料の水和反応を効果的に活性化することができる。 In addition, according to the activity estimation method for another cement mixture according to the present invention, the accelerated temperature is set to a constant temperature between 30 to 60 ° C., so that the hydration reaction of the sample can be effectively activated. Can do.
また、本発明に係る他のセメント用混合材の活性度推定方法によれば、水粉体比を０．６としたので、試料の水和反応を効果的に活性化することができる。 Moreover, according to the activity estimation method of the other cement-mixing material according to the present invention, since the water powder ratio is set to 0.6, the hydration reaction of the sample can be effectively activated.
また、本発明に係るセメント用混合材の活性度推定装置によれば、セメントに混合して用いられる混合材の活性度指数を推定する装置であって、セメントと混合材と反応活性剤と水とを所定の水粉体比で混合してなる試料の積算発熱量を、反応を促進したい所定の促進温度の下で測定する測定手段と、測定された試料の積算発熱量と、あらかじめ把握してある試料の積算発熱量と混合材の活性度指数の関係に基づいて、混合材の活性度指数を推定する推定手段とを備えるので、活性度指数を簡易かつ精度よく推定することができる。 Further, according to the activity estimation device for a cement mixed material according to the present invention, the device estimates the activity index of the mixed material used by mixing with cement, and includes cement, the mixed material, the reactive activator, and water. The measurement calorific value of the sample that is mixed at a predetermined water-powder ratio is measured in advance at a predetermined acceleration temperature at which the reaction is to be promoted, and the accumulated calorific value of the measured sample is determined in advance. Since the estimation means for estimating the activity index of the mixed material based on the relationship between the accumulated calorific value of the sample and the activity index of the mixed material is provided, the activity index can be estimated easily and accurately.
また、本発明に係る他のセメント用混合材の活性度推定装置によれば、促進温度を３０〜６０℃の間の一定温度としたので、試料の水和反応を効果的に活性化することができる。 Moreover, according to the activity estimation apparatus of the other cement-mixing material according to the present invention, since the accelerating temperature is set to a constant temperature between 30 to 60 ° C., the sample hydration reaction can be effectively activated. Can do.
また、本発明に係る他のセメント用混合材の活性度推定装置によれば、水粉体比を０．６としたので、試料の水和反応を効果的に活性化することができる。 Moreover, according to the activity estimation apparatus of the other cement-mixing material according to the present invention, since the water powder ratio is set to 0.6, the hydration reaction of the sample can be effectively activated.
また、本発明に係る混合セメントの製造方法によれば、セメント用混合材の活性度推定方法を用いて推定された混合材の活性度指数に基づいて混合材を選択し、選択した混合材とセメントとを混合して混合セメントを製造するので、強度発現性に優れた混合セメントを製造することができる。 Further, according to the method for producing a mixed cement according to the present invention, the mixture is selected based on the activity index of the mixture estimated using the activity estimation method of the cement mixture, and the selected mixture and Since mixed cement is manufactured by mixing with cement, mixed cement excellent in strength development can be manufactured.
以上のように、本発明に係るセメント用混合材の活性度推定方法、活性度推定装置および混合セメントの製造方法は、混合セメントを使用したモルタルの品質の指標となる混合材の活性度指数を推定するのに有用であり、特に、活性度指数を簡易かつ精度よく推定するのに適している。 As described above, the activity estimation method, the activity estimation device, and the mixed cement manufacturing method of the cement-mixing material according to the present invention have the activity index of the mixture serving as an index of the quality of mortar using the mixed cement. It is useful for estimation, and is particularly suitable for estimating the activity index simply and accurately.
Claims (7)
セメントと混合材と反応活性剤とを混合し、所定の水粉体比で水と混ぜて試料を作製するステップと、反応を促進したい所定の促進温度の下で試料の積算発熱量を測定するステップと、測定した試料の積算発熱量と、あらかじめ把握してある試料の積算発熱量と混合材の活性度指数の関係に基づいて、混合材の活性度指数を推定するステップとを備えることを特徴とするセメント用混合材の活性度推定方法。 A method for estimating an activity index of a mixed material used by mixing with cement,
Mixing cement, mixed material and reaction activator, mixing with water at a predetermined water powder ratio to prepare a sample, and measuring the accumulated calorific value of the sample at a predetermined acceleration temperature at which the reaction is to be promoted And a step of estimating the activity index of the mixed material based on the relationship between the measured cumulative calorific value of the sample and the relationship between the cumulative calorific value of the sample and the activity index of the mixed material, which has been grasped in advance. A method for estimating the activity of a cement-mixing material.
セメントと混合材と反応活性剤と水とを所定の水粉体比で混合してなる試料の積算発熱量を、反応を促進したい所定の促進温度の下で測定する測定手段と、測定された試料の積算発熱量と、あらかじめ把握してある試料の積算発熱量と混合材の活性度指数の関係に基づいて、混合材の活性度指数を推定する推定手段とを備えることを特徴とするセメント用混合材の活性度推定装置。 An apparatus for estimating an activity index of a mixed material used by mixing with cement,
A measuring means for measuring an integrated calorific value of a sample obtained by mixing cement, a mixture, a reaction activator and water at a predetermined water powder ratio at a predetermined acceleration temperature at which the reaction is to be promoted; A cement comprising: an integrated calorific value of the sample; and an estimation means for estimating the activity index of the mixed material based on a relationship between the accumulated calorific value of the sample and the activity index of the mixed material, which has been grasped in advance Activity estimation device for mixed materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017004434A JP2018112518A (en) | 2017-01-13 | 2017-01-13 | Activity estimation method for mixed material for cement, activity estimation device, and preparation method of mixed cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017004434A JP2018112518A (en) | 2017-01-13 | 2017-01-13 | Activity estimation method for mixed material for cement, activity estimation device, and preparation method of mixed cement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2018112518A true JP2018112518A (en) | 2018-07-19 |
Family
ID=62911131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2017004434A Pending JP2018112518A (en) | 2017-01-13 | 2017-01-13 | Activity estimation method for mixed material for cement, activity estimation device, and preparation method of mixed cement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2018112518A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021080762A (en) * | 2019-11-20 | 2021-05-27 | 清水建設株式会社 | Cement amount estimation method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11106244A (en) * | 1997-09-30 | 1999-04-20 | Mitsubishi Materials Corp | Cement composition |
| JP2010285302A (en) * | 2009-06-09 | 2010-12-24 | Tokyo Institute Of Technology | Hydraulic cement composition |
| JP2015135257A (en) * | 2014-01-16 | 2015-07-27 | 清水建設株式会社 | Estimation method and estimation device of mortar compression strength |
| JP2015161672A (en) * | 2014-02-28 | 2015-09-07 | 清水建設株式会社 | Determination method and determination device for admixture in cement |
| US20160223512A1 (en) * | 2015-01-30 | 2016-08-04 | Quipip, Llc | Systems, apparatus and methods for testing and predicting the performance of concrete mixtures |
| JP2016180748A (en) * | 2015-03-23 | 2016-10-13 | 宇部興産株式会社 | Selection method of blast furnace slag, and manufacturing method of blast furnace cement |
-
2017
- 2017-01-13 JP JP2017004434A patent/JP2018112518A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11106244A (en) * | 1997-09-30 | 1999-04-20 | Mitsubishi Materials Corp | Cement composition |
| JP2010285302A (en) * | 2009-06-09 | 2010-12-24 | Tokyo Institute Of Technology | Hydraulic cement composition |
| JP2015135257A (en) * | 2014-01-16 | 2015-07-27 | 清水建設株式会社 | Estimation method and estimation device of mortar compression strength |
| JP2015161672A (en) * | 2014-02-28 | 2015-09-07 | 清水建設株式会社 | Determination method and determination device for admixture in cement |
| US20160223512A1 (en) * | 2015-01-30 | 2016-08-04 | Quipip, Llc | Systems, apparatus and methods for testing and predicting the performance of concrete mixtures |
| JP2016180748A (en) * | 2015-03-23 | 2016-10-13 | 宇部興産株式会社 | Selection method of blast furnace slag, and manufacturing method of blast furnace cement |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021080762A (en) * | 2019-11-20 | 2021-05-27 | 清水建設株式会社 | Cement amount estimation method |
| JP7374730B2 (en) | 2019-11-20 | 2023-11-07 | 清水建設株式会社 | How to estimate cement amount |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Mallikarjuna Rao et al. | A quantitative method of approach in designing the mix proportions of fly ash and GGBS-based geopolymer concrete | |
| Junaid et al. | A mix design procedure for low calcium alkali activated fly ash-based concretes | |
| Khan et al. | Effects of curing conditions and sand-to-binder ratios on compressive strength development of fly ash geopolymer | |
| Altan et al. | The setting mechanism of mineral trioxide aggregate | |
| Parashar et al. | A comparison of test methods to assess the strength potential of plain and blended supplementary cementitious materials | |
| Xu et al. | Calorimetric study on the influence of calcium sulfate on the hydration of Portland cement–calcium aluminate cement mixtures | |
| JP2016166866A (en) | Quantitative analysis method of multicomponent system mixture cement, and manufacture management system of multicomponent system mixture cement | |
| Gupta et al. | Experimental study of the mechanical and durability properties of Slag and Calcined Clay based geopolymer composite | |
| JP2007271448A (en) | Quality estimation method of cement, and quality control method using same | |
| Zhang et al. | Microstructure and properties of sulfoaluminate cement‐based grouting materials: effect of calcium sulfate variety | |
| JP6718551B1 (en) | Powder quick-setting agent | |
| Djayaprabha et al. | Utilizing phosphogypsum waste to improve the mechanical and durability performances of cement-free structural mortar containing ground granulated blast furnace slag and calcium oxide | |
| Haruna et al. | Compressive strength and workability of High Calcium One-Part alkali activated mortars using response surface methodology | |
| JP2018112518A (en) | Activity estimation method for mixed material for cement, activity estimation device, and preparation method of mixed cement | |
| Hirschi et al. | Influence of different superplasticizers on UHPC | |
| Espion et al. | Characterisation of new ternary cements with reduced clinker content | |
| JP2017067477A (en) | Method for estimating compressive strength and/or static elastic modulus of concrete | |
| Regalla et al. | Effect of curing regimes on the rheological, mechanical, hydration and microstructure of ultra-high-performance concrete (UHPC) using indigenous resources: progress towards sustainable construction practices | |
| Allahverdi et al. | A model for prediction of compressive strength of chemically activated high phosphorous slag content cement | |
| LI | Sulfate resistance of fly ash concrete | |
| Skibicki et al. | Maturity testing of 3D printing concrete with inert microfiller | |
| Naqi et al. | Monitoring early age elastic and viscoelastic properties of alkali-activated slag mortar by means of repeated minute-long loadings | |
| Sharanova et al. | Study of strength kinetics of sand concrete system of accelerated hardening | |
| JP2014148059A (en) | Method for producing concrete having desired characteristics | |
| Provis | Alkali-activated cements and concretes–durability testing to underpin standardisation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20191223 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20200812 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20200818 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20210302 |