JPH0712959B2 - Blast furnace cement manufacturing method - Google Patents
Blast furnace cement manufacturing methodInfo
- Publication number
- JPH0712959B2 JPH0712959B2 JP60256763A JP25676385A JPH0712959B2 JP H0712959 B2 JPH0712959 B2 JP H0712959B2 JP 60256763 A JP60256763 A JP 60256763A JP 25676385 A JP25676385 A JP 25676385A JP H0712959 B2 JPH0712959 B2 JP H0712959B2
- Authority
- JP
- Japan
- Prior art keywords
- blast furnace
- cement
- slag
- grinding aid
- calcium carbonate
- 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 - Lifetime
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/08—Slag cements
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は高炉セメントの製造方法、特に粉砕工程の改良
により初期強度を改善した高炉セメントの製造方法に関
するものである。Description: TECHNICAL FIELD The present invention relates to a method for producing blast furnace cement, and more particularly to a method for producing blast furnace cement having improved initial strength by improving a crushing process.
従来の技術 現在ポルトランドセメントに各種の混合材、例えば高炉
水砕スラグ、フライアッシュ、シリカ質混合材を粉砕混
合してそれぞれ高炉セメント、フライアッシュセメン
ト、シリカセメントと称される混合セメントが製造され
ている。Conventional technology Currently, various mixed materials such as granulated blast furnace slag, fly ash, and siliceous mixed material are crushed and mixed with Portland cement to produce mixed cement called blast furnace cement, fly ash cement, and silica cement, respectively. There is.
これらの混合セメントは水和熱が小さい、長期強度が大
きい、価格が廉いという長所があり、年々需要が増大し
ている。These mixed cements have the advantages of low heat of hydration, high long-term strength, and low price, and the demand for them is increasing year by year.
しかし、その混合材の性質によって、何れの混合セメン
トも初期強度がポルトランドセメントに比較して小さい
のが欠点である。However, the disadvantage is that the initial strength of any of the mixed cements is smaller than that of Portland cement due to the properties of the mixed material.
構築材料としてのセメントの利用状況からみれば施工
後、凝結硬化が速く、初期強度が大きいことが型枠の利
用率、工事期間の短縮等に有利である。From the viewpoint of the usage status of cement as a construction material, it is advantageous that the setting hardening is fast and the initial strength is large after construction, in order to use the formwork and shorten the construction period.
特に最近工事現場における人件費の節約、舗装道路工事
後の早期交通開始のため初期凝結硬化の促進対策が研究
されている。この一例として、混合セメントの混合材の
厳選、混合率の調整、セメントの微粉砕等の研究が行わ
れてきたが、初期強度の改善は十分でなかった。In particular, recently, research has been conducted on measures to promote early setting hardening in order to save labor costs at construction sites and start early traffic after paved road construction. As one example of this, researches such as careful selection of mixed material of mixed cement, adjustment of mixing ratio, and fine pulverization of cement have been conducted, but improvement of initial strength was not sufficient.
セメントの微粉砕はかなりの効果があるが、粉砕ミルの
能力に限界があり、粉砕コストの増大および水和熱、偽
凝結性、乾燥収縮の増大傾向があるので微粉砕の程度が
過ぎるのは得策ではない。また、粉砕のための経費がか
さむのも問題であった。Although fine grinding of cement is quite effective, the degree of fine grinding is too high because the capacity of the grinding mill is limited and the cost of grinding increases and heat of hydration, pseudo-caking and drying shrinkage tend to increase. Not a good idea. Another problem is that the cost for crushing is high.
発明が解決しようとする問題点 本発明は、初期強度が大きく、しかもその後の強度に悪
影響がない高炉セメントを提供することを目的としてお
り、更に高炉セメントにおけるポルト粉（ポルトランド
セメント粉）とスラグ粉（水砕スラグ粉砕物）の配合割
合を変えた高炉セメントを容易に製造する方法を提供す
ることを目的としている。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention aims to provide a blast furnace cement having a large initial strength and having no adverse effect on the strength thereafter, and further, port powder (Portland cement powder) and slag powder in the blast furnace cement. It is an object of the present invention to provide a method for easily producing blast furnace cement in which the mixing ratio of (granulated slag crushed product) is changed.
問題点を解決するための手段 上記問題点を解決するための本発明の構成は、セメント
クリンカーに適量の石膏及び粉砕助剤さらに必要により
炭酸カルシウムを95重量％以上含有する物質を混合粉砕
したポルトランドセメント粉と、高炉水砕スラグに炭酸
カルシウムを95％以上含有する物質及び粉砕助剤とを混
合粉砕したスラグ粉との各々の分離粉砕品を混合するこ
とを特徴とする高炉セメントの製造方法である。Means for Solving the Problems The constitution of the present invention for solving the above problems is a Portland semén in which a cement clinker is mixed and ground with an appropriate amount of gypsum and a grinding aid and, if necessary, a substance containing 95% by weight or more of calcium carbonate. In a method for producing blast furnace cement, characterized in that each separated and pulverized product of slag powder obtained by mixing pulverized blast powder and ground blast furnace slag with a substance containing 95% or more of calcium carbonate and a pulverization aid is pulverized. is there.
本発明で用いるポルトランドセメント粉はポルトランド
セメントクリンカーに石膏および粉砕助剤を混合、粉砕
したものであるが、従来方法としてのクリンカーに石
膏、炭酸カルシウムを95％以上含有する物質および粉砕
助剤を混合、粉砕したものであってもよい。The Portland cement powder used in the present invention is a Portland cement clinker mixed with gypsum and a grinding aid, and the clinker as a conventional method is mixed with gypsum, a substance containing 95% or more of calcium carbonate and a grinding aid. It may be crushed.
スラグ粉は高炉水砕スラグに炭酸カルシウムを95％以上
含有する物質および粉砕助剤を混合、粉砕したものであ
る。The slag powder is obtained by mixing and grinding a granulated blast furnace slag with a substance containing 95% or more of calcium carbonate and a grinding aid.
高炉水砕スラグと混合、粉砕する炭酸カルシウムを95％
以上含有する物質としては石灰石、大理石、方解石、ア
ラレ石等がある。この炭酸カルシウムを95％以上含有す
る物質をポルトランドセメントクリンカーあるいは水砕
スラグに混合、粉砕することによって、上記セメントク
リンカーや水砕スラグの粉砕が容易になると同時に、製
品である高炉セメントの初期強度の改善効果がある。95% calcium carbonate to be mixed and crushed with granulated blast furnace slag
The substances contained above include limestone, marble, calcite, aragonite, and the like. By mixing and pulverizing this substance containing 95% or more of calcium carbonate with Portland cement clinker or granulated slag, the cement clinker and granulated slag can be easily pulverized, and at the same time, the initial strength of the product, blast furnace cement, can be improved. There is an improvement effect.
この炭酸カルシウムを95％以上含有する物質の添加量
は、高炉セメント全体に対して、1.0重量％未満では、
その効果が従来高炉水砕スラグ単味の粉砕品と同程度で
あり、2.0重量％を越えると初期強度は向上するが、長
期強度（28日）の低下の原因になる。If the amount of the substance containing 95% or more of calcium carbonate is less than 1.0% by weight based on the whole blast furnace cement,
The effect is similar to that of the conventional ground blast furnace granulated slag, and if it exceeds 2.0% by weight, the initial strength is improved, but the long-term strength (28 days) is reduced.
粉砕助剤は、ポルトランドセメントクリンカーあるいは
水砕スラグの粉砕の際に粉砕媒体およびライナー等に被
粉砕物のコーチングが発生し、その結果粉砕効率が悪化
するのを防止する作用がある物質であり、これを被粉砕
物に添加して粉砕することによってコーチングの発生が
防止でき、粉砕効率の悪化が防止できる。The grinding aid is a substance that has an action of preventing the grinding of the material to be ground in the grinding medium and the liner during the grinding of the Portland cement clinker or the water granulated slag, resulting in deterioration of the grinding efficiency, By adding this to the material to be pulverized and pulverizing it, it is possible to prevent the occurrence of coating and prevent deterioration of the pulverization efficiency.
更に、この粉砕助剤を含有することによって、高炉セメ
ントの初期強度が向上することも発見された。Further, it has been discovered that the initial strength of blast furnace cement is improved by containing this grinding aid.
この粉砕助剤として用いることができる物質を具体的に
例示すると、トリエタノールアミン、ジエチレングリコ
ールおよびプロピレングリコール等が利用できるが、ト
リエタノールアミンが適当である。Specific examples of the substance that can be used as the grinding aid include triethanolamine, diethylene glycol and propylene glycol, and triethanolamine is suitable.
この粉砕助剤の添加量は高炉セメント全体に対して0.00
5〜0.015重量％が適当である。0.005重量％未満では粉
砕助剤としての効果も初期強度を向上させる効果も不十
分であり、0.005重量％から0.015重量％までは添加量に
比例して粉砕効率が向上し、0.015重量％を越えると添
加量に比例して粉砕効果が低下し、かつ、初期強度増強
効果も小さくなる。The amount of this grinding aid added is 0.00 based on the total blast furnace cement.
5 to 0.015% by weight is suitable. If it is less than 0.005% by weight, neither the effect as a grinding aid nor the effect of improving the initial strength is insufficient. From 0.005% by weight to 0.015% by weight, the grinding efficiency is improved in proportion to the added amount, and it exceeds 0.015% by weight. The crushing effect decreases in proportion to the addition amount, and the initial strength increasing effect also decreases.
本発明の実施に際して、混合粉砕の程度は通常の粉末度
に粉砕すればよく、粉砕方法および装置に特に制限はな
い。In carrying out the present invention, the degree of mixing and pulverization may be such that the pulverization is performed to an ordinary pulverization degree, and the pulverization method and apparatus are not particularly limited.
ポルトランドセメント粉とスラグ粉との配合比はポルト
ランドセメント粉とスラグ粉中の石膏、炭酸カルシウム
を95％以上含有する物質、粉砕助剤等の含有量を適正に
組合わせることによって目的とする初期強度を有する高
炉セメントを製造できるように選定すればよい。The mixing ratio of Portland cement powder and slag powder is the target initial strength by properly combining the contents of gypsum, substances containing 95% or more of calcium carbonate, grinding aids, etc. in Portland cement powder and slag powder. It may be selected so that a blast furnace cement having
実施例 以下、本発明を実施例によって、具体的に説明する。Examples Hereinafter, the present invention will be specifically described with reference to Examples.
第１表に示す組成のポルト粉（ポルトランドセメント
粉）およびスラグ粉を通常の回転ミルを用いて別々に粉
砕し、それを配合して第１表に示す組成の高炉セメント
にした。試料番号４〜６が本発明の実施例でその他は比
較例である。Porto powder (Portland cement powder) having the composition shown in Table 1 and slag powder were separately pulverized by using a normal rotary mill, and they were compounded into blast furnace cement having the composition shown in Table 1. Sample Nos. 4 to 6 are examples of the present invention, and others are comparative examples.
配合したポルト粉およびスラグ粉の各ブレーン値（粉末
度）は、ポルト粉が3700cm2/g、スラグ粉が3800cm2/gで
あった。Compounded Porto flour and the Blaine value of the slags powder (fineness) is Porto powder 3700 cm 2 / g, slag powder was 3800 cm 2 / g.
第１表に示す各試料番号からつくったモルタルの成形品
の圧縮強さは第２表に示すとおりであった。ただし、試
験方法はJIS、Ｒ−5201によった。The compressive strength of the mortar molded articles made from the respective sample numbers shown in Table 1 was as shown in Table 2. However, the test method was according to JIS, R-5201.
上記高炉セメントの各試料を製造するのに要する粉砕電
力原単位を第３表に示す。Table 3 shows the crushing electric power consumption required to manufacture each sample of the blast furnace cement.
以上、第１表および第２表の記載からスラグ粉中に、全
セメント量に対して、炭酸カルシウムを95％以上含有す
る物質を1.0〜2.0重量と粉砕助剤0.005％含有する高炉
セメントは28日モルタル圧縮強度は大体一定であるが初
期強度といわれる３日、７日圧縮強度が改善され、1.07
〜1.15倍に増強されていることがわかる。 As described above, from Table 1 and Table 2, the blast furnace cement containing 1.0 to 2.0% by weight of the substance containing 95% or more of calcium carbonate and 0.005% of the grinding aid with respect to the total amount of cement in the slag powder is 28 The mortar compressive strength per day is almost constant, but the compressive strength for 3 days and 7 days, which is said to be the initial strength, improved to 1.07
It can be seen that it is enhanced by 1.15 times.
また、この高炉セメントを製造するのに消費した電力原
単位は第３表に示すとおり、約５％低減しているといえ
る。Moreover, it can be said that the power consumption rate consumed to manufacture this blast furnace cement has been reduced by about 5%, as shown in Table 3.
発明の効果 以上、説明したように、この発明によれば、比較的小さ
な電力原単位でモルタルの初期強度が大きく、高炉セメ
ントを製造することができる。EFFECTS OF THE INVENTION As described above, according to the present invention, it is possible to produce blast furnace cement with a large initial strength of mortar with a relatively small electric power consumption rate.
Claims (4)
助剤さらに必要により炭酸カルシウムを95重量％以上含
有する物質を混合粉砕したポルトランドセメント粉と、
高炉水砕スラグに炭酸カルシウムを95％以上含有する物
質及び粉砕助剤とを混合粉砕したスラグ粉との各々の分
離粉砕品を混合することを特徴とする高炉セメントの製
造方法。1. A Portland cement powder obtained by mixing and crushing a cement clinker with an appropriate amount of gypsum and a grinding aid, and if necessary, a substance containing calcium carbonate in an amount of 95% by weight or more,
A method for producing blast furnace cement, which comprises mixing granulated blast furnace slag with a substance containing 95% or more of calcium carbonate and a grinding aid, and mixing the separated and ground products with slag powder.
カルシウムを95重量％以上含有する物質の添加量が全セ
メント量の1.0〜2.0％である特許請求の範囲第（１）項
記載の高炉セメントの製造方法。2. The blast furnace according to claim 1, wherein the amount of the substance containing 95% by weight or more of calcium carbonate mixed and ground with the granulated blast furnace slag is 1.0 to 2.0% of the total amount of cement. Cement manufacturing method.
が全セメント量の0.005〜0.015％である特許請求の範囲
（１）または（２）記載の高炉セメントの製造方法。3. The method for producing blast furnace cement according to claim 1, wherein the amount of the grinding aid added to the granulated blast furnace slag is 0.005 to 0.015% of the total amount of cement.
許請求の範囲（１）乃至（３）のいずれかに記載の高炉
セメントの製造方法。4. The method for producing a blast furnace cement according to any one of claims 1 to 3, wherein the grinding aid is triethanolamine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60256763A JPH0712959B2 (en) | 1985-11-18 | 1985-11-18 | Blast furnace cement manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60256763A JPH0712959B2 (en) | 1985-11-18 | 1985-11-18 | Blast furnace cement manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62119145A JPS62119145A (en) | 1987-05-30 |
| JPH0712959B2 true JPH0712959B2 (en) | 1995-02-15 |
Family
ID=17297105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60256763A Expired - Lifetime JPH0712959B2 (en) | 1985-11-18 | 1985-11-18 | Blast furnace cement manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0712959B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0346638U (en) * | 1989-08-25 | 1991-04-30 | ||
| JP4498592B2 (en) * | 2000-11-30 | 2010-07-07 | 電気化学工業株式会社 | Cement admixture and cement composition |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5191933A (en) * | 1975-02-12 | 1976-08-12 | ||
| JPS5443008A (en) * | 1977-09-12 | 1979-04-05 | Hitachi Ltd | Write-read system |
| JPS55154359A (en) * | 1979-05-14 | 1980-12-01 | Tokuyama Soda Kk | Manufacture of blast furnace cement |
| JPS55162457A (en) * | 1979-05-31 | 1980-12-17 | Osaka Cement | Manufacture of low hydration heat high strength cement |
-
1985
- 1985-11-18 JP JP60256763A patent/JPH0712959B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5191933A (en) * | 1975-02-12 | 1976-08-12 | ||
| JPS5443008A (en) * | 1977-09-12 | 1979-04-05 | Hitachi Ltd | Write-read system |
| JPS55154359A (en) * | 1979-05-14 | 1980-12-01 | Tokuyama Soda Kk | Manufacture of blast furnace cement |
| JPS55162457A (en) * | 1979-05-31 | 1980-12-17 | Osaka Cement | Manufacture of low hydration heat high strength cement |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62119145A (en) | 1987-05-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |