JP2000302491A - Cement composition - Google Patents
Cement compositionInfo
- Publication number
- JP2000302491A JP2000302491A JP11114830A JP11483099A JP2000302491A JP 2000302491 A JP2000302491 A JP 2000302491A JP 11114830 A JP11114830 A JP 11114830A JP 11483099 A JP11483099 A JP 11483099A JP 2000302491 A JP2000302491 A JP 2000302491A
- Authority
- JP
- Japan
- Prior art keywords
- sewage sludge
- containing material
- amount
- sulfur
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/243—Mixtures thereof with activators or composition-correcting additives, e.g. mixtures of fly ash and alkali activators
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00198—Characterisation or quantities of the compositions or their ingredients expressed as mathematical formulae or equations
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、リサイクル原料で
ある下水汚泥スラッジを主に使用して製造されたポルト
ランドセメントクリンカー及びポルトランドセメント
（以下、セメント組成物という）に関する。[0001] The present invention relates to a Portland cement clinker and a Portland cement (hereinafter referred to as a cement composition) produced mainly by using sewage sludge as a recycled material.
【０００２】[0002]
【従来の技術】従来から、下水汚泥スラッジやその焼却
灰は、資源のリサイクルを目的として、ポルトランドセ
メントの原料のひとつである粘土の代替として使用され
ていた。2. Description of the Related Art Conventionally, sewage sludge and its incineration ash have been used as a substitute for clay, which is one of the raw materials of Portland cement, for the purpose of recycling resources.
【０００３】[0003]
【発明が解決しようとする課題】しかし、下水汚泥スラ
ッジの固形分中にはＰ2Ｏ5換算で１５〜３０重量％のリ
ンが含まれており、このリンはセメントの凝結時間の延
長や初期強度の低下を招くという問題があり、下水汚泥
スラッジの使用量を一定限度以上に増やすことは困難で
あった。[0008] However, the solid content of the sewage sludge sludge includes a phosphorus 15-30 wt% in terms of P 2 O 5, extension and early this phosphorus setting time of the cement There is a problem that the strength is reduced, and it has been difficult to increase the amount of sewage sludge used beyond a certain limit.
【０００４】従って、本発明の目的は、セメントの凝結
時間の延長や初期強度の低下を招くことなく下水汚泥ス
ラッジの使用量を増やすことのできるセメント組成物を
提供することにある。Accordingly, an object of the present invention is to provide a cement composition which can increase the amount of sewage sludge used without increasing the setting time of the cement or lowering the initial strength.
【０００５】[0005]
【課題を解決するための手段】斯かる実情に鑑み本発明
者は鋭意研究を行った結果、下水汚泥スラッジからのＰ
2Ｏ5量に対し、所定の割合で硫黄含有材料又はカルシウ
ム含有材料を配合したものを原料として用いれば、下水
汚泥スラッジ量を増加でき、かつ得られたセメントは凝
固時間の延長や初期強度の低下がないことを見出し本発
明を完成した。また、硫黄含有材料として廃棄物や副産
物を用いることができるため、これらの有効利用も図れ
る。Means for Solving the Problems In view of such circumstances, the present inventor has conducted intensive studies and as a result, has found that P from sewage sludge sludge is reduced.
To 2 O 5 amount, by using a material obtained by mixing the sulfur-containing material or a calcium-containing material at a predetermined ratio as a raw material, can increase the sewage sludge amount of sludge, and the resulting cement coagulation time extension and initial strength The inventor found that there was no reduction and completed the present invention. Further, since waste and by-products can be used as the sulfur-containing material, their effective use can be achieved.
【０００６】すなわち、本発明は、下水汚泥スラッジと
硫黄含有材料を含み、（硫黄含有材料からのＳＯ3量）
／（下水汚泥スラッジからのＰ2Ｏ5量）が重量比で０．
５以上となるように調整された原料を使用して製造され
たポルトランドセメントクリンカーを提供するものであ
る。また、本発明は、下水汚泥スラッジとカルシウム含
有材料を含み、（カルシウム含有材料からのＣａＯ量）
／（下水汚泥スラッジからのＰ2Ｏ5量）が重量比で０．
６以上となるように調整された原料を使用して製造され
たポルトランドセメントクリンカーを提供するものであ
る。That is, the present invention comprises sewage sludge and a sulfur-containing material (SO 3 amount from the sulfur-containing material)
/ (The amount of P 2 O 5 from sewage sludge) is 0.1% by weight.
It is intended to provide a Portland cement clinker manufactured using a raw material adjusted to be 5 or more. The present invention also includes a sewage sludge and a calcium-containing material, (CaO amount from the calcium-containing material)
/ (The amount of P 2 O 5 from sewage sludge) is 0.1% by weight.
It is intended to provide a Portland cement clinker manufactured using a raw material adjusted to be 6 or more.
【０００７】[0007]
【発明の実施の形態】本発明のセメント組成物の原料の
一つである下水汚泥スラッジは、水分を含むものであっ
ても、脱水や焼却等の処理を施したものであってもよ
い。下水汚泥スラッジは、例えば、焼却灰として用いた
場合、２０〜２００kg／ｔ（クリンカー）用いることが
好ましく、特に２０〜１００kg／ｔ（クリンカー）用い
ることが好ましい。なお従来は最大１０kg／ｔ（クリン
カー）が限度であった。BEST MODE FOR CARRYING OUT THE INVENTION Sewage sludge, which is one of the raw materials of the cement composition of the present invention, may contain water or may have been subjected to a treatment such as dehydration or incineration. When sewage sludge is used as incineration ash, for example, it is preferable to use 20 to 200 kg / t (clinker), and particularly preferable to use 20 to 100 kg / t (clinker). Conventionally, the maximum was 10 kg / t (clinker).
【０００８】また、硫黄含有材料としては、特に限定さ
れないが硫黄含有廃棄物又は／及び副産物を用いること
が好ましく、特に０．５重量％以上の硫黄を含有するも
のが好ましい。硫黄含有材料としては、排脱石こう、石
こうボード屑、石油コークス、石炭灰、生コンスラッ
ジ、ＡＬＣ廃材等が挙げられる。これらの材料は、所望
のクリンカー組成を得るために、硫黄以外の成分も考慮
して選択することが好ましい。[0008] The sulfur-containing material is not particularly limited, but it is preferable to use sulfur-containing waste and / or by-products, and particularly preferable to contain 0.5% by weight or more of sulfur. Examples of the sulfur-containing material include waste gypsum, gypsum board waste, petroleum coke, coal ash, raw con sludge, and ALC waste. These materials are preferably selected in consideration of components other than sulfur in order to obtain a desired clinker composition.
【０００９】下水汚泥スラッジと硫黄含有材料との混合
比率は、（硫黄含有材料からのＳＯ 3量）／（下水汚泥
スラッジからのＰ2Ｏ5量）が重量比で０．５以上、好ま
しくは０．７〜３になるように調整する。この重量比が
０．５未満であると凝結時間の延長防止効果や初期強度
の低下防止効果が十分に奏されない。Mixing of sewage sludge with sulfur-containing materials
The ratio is (SO from sulfur containing material ThreeAmount) / (Sewage sludge
P from sludgeTwoOFiveAmount) is preferably 0.5 or more by weight.
Or 0.7 to 3. This weight ratio is
If it is less than 0.5, the effect of preventing the setting time from being prolonged and the initial strength.
Is not sufficiently exhibited.
【００１０】一方、本発明に用いるカルシウム含有材料
としては、特に限定されず、例えば石灰石、生石灰、石
こう、水酸化カルシウム等が挙げられる。On the other hand, the calcium-containing material used in the present invention is not particularly restricted but includes, for example, limestone, quicklime, gypsum, calcium hydroxide and the like.
【００１１】下水汚泥スラッジとカルシウム含有材料の
混合比率は、（カルシウム含有材料からのＣａＯ量）／
（下水汚泥スラッジからのＰ2Ｏ5量）が重量比で０．６
以上、好ましくは、０．７〜３になるように調整する。
この重量比が０．６未満であると凝結時間の延長防止効
果や初期強度の低下防止効果が十分に奏されない。[0011] The mixing ratio of the sewage sludge and the calcium-containing material is expressed as (amount of CaO from the calcium-containing material) /
(The amount of P 2 O 5 from sewage sludge) is 0.6% by weight.
As described above, preferably, it is adjusted to be 0.7 to 3.
If the weight ratio is less than 0.6, the effect of preventing the setting time from being prolonged and the effect of preventing the initial strength from being lowered are not sufficiently exhibited.
【００１２】また、本発明においては、上記ＳＯ3量と
ＣａＯ量の両者が上記重量比を満たすようにするのがさ
らに好ましい。本発明では、上記原料以外に、通常のセ
メントの主原料である珪石、粘土、鉱滓、石灰石を用い
る。また、この他通常セメントの原料として用いられる
鉄鉱スラグ、石炭灰等を必要により配合してもよい。In the present invention, it is further preferable that both the SO 3 amount and the CaO amount satisfy the weight ratio. In the present invention, silica, clay, slag, and limestone, which are main raw materials of ordinary cement, are used in addition to the above raw materials. In addition, iron ore slag, coal ash, and the like, which are usually used as raw materials for cement, may be added as necessary.
【００１３】なお、下水汚泥スラッジにカルシウム含有
材料が含まれている場合は、その分だけ石灰石等のカル
シウム含有材料を減ずればよい。If the sewage sludge contains a calcium-containing material, the amount of calcium-containing material such as limestone may be reduced accordingly.
【００１４】本発明のクリンカーは、通常により製造す
ることができる。硫黄含有材料又はカルシウム含有材料
と下水汚泥スラッジの混合は、セメントの主原料である
石灰石、珪石等と共に行ってもよいし、また、夫々別に
行って後に混合してもよい。なお、硫黄含有材料は、ロ
ータリーキルン等での焼成途中で添加してもよく、石灰
石や石炭灰はクリンカーの粉砕時に添加してもよい。The clinker of the present invention can be produced by a usual method. The mixing of the sulfur-containing material or the calcium-containing material and the sewage sludge may be performed together with limestone, silica, or the like, which is the main raw material of the cement, or may be performed separately and mixed later. The sulfur-containing material may be added during firing in a rotary kiln or the like, and limestone or coal ash may be added during clinker pulverization.
【００１５】混合された原料は、ロータリーキルン等で
焼成されるが、このときの温度は１３５０〜１５５０℃
とすることが好ましい。The mixed raw materials are fired in a rotary kiln or the like, at a temperature of 1350 to 1550 ° C.
It is preferable that
【００１６】そして、得られたクリンカーを冷却し、石
こうと共に粉砕すれば、本発明のセメントが得られる。
なお、ここで用いる石こうは、無水、半水又は二水のい
ずれであってもよい。また、石こうの外にクエン酸など
の有機酸、硫酸アルカリ、硝酸アルカリ、塩化アルカリ
などを添加するとセメントペースト、モルタル、コンク
リートの流動性を高めたり硬化時間を制御するのに効果
がある。The resulting clinker is cooled and ground together with gypsum to obtain the cement of the present invention.
The gypsum used here may be any of anhydrous, hemihydrate or dihydrate. The addition of an organic acid such as citric acid, an alkali sulfate, an alkali nitrate, an alkali chloride, etc., in addition to gypsum, is effective in increasing the fluidity of cement paste, mortar and concrete and controlling the setting time.
【００１７】[0017]
【実施例】以下、実施例を挙げて本発明をさらに詳細に
説明するが本発明はこれに限定されるものではない。EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the present invention is limited thereto.
【００１８】実施例１〜３ 表１に示す成分の原料を用いセメントを製造した。な
お、下水汚泥スラッジはその焼却灰を用いた。また、硫
黄含有材料は、石こうボードの廃材を用いた。表２にク
リンカー原料の調合を示す。クリンカーの特性は主要化
学成分の指標である３つの係数ＨＭ、ＳＭ、ＩＭにより
大きく変化するため、実施例、比較例ともにそれらの係
数がすべて同じにになるよう調合した。尚、ＨＭはＣａ
Ｏ／（ＳｉＯ2＋Ａｌ2Ｏ3＋Ｆｅ2Ｏ3）、ＳＭはＳｉＯ2
／（Ａｌ2Ｏ3＋Ｆｅ2Ｏ3）、ＩＭはＡｌ2Ｏ3／Ｆｅ2Ｏ3
である。調合した原料はロータリーキルン内で１４５０
℃で焼成し、冷却後、内割で３重量％の二水石こうとと
もに粉砕し、ブレーン比表面積３３００cm2／ｇのセメ
ントを得た。セメントの凝結時間とモルタル圧縮強さを
ＪＩＳ Ｒ５２０１−１９９７にしたがって測定した。
測定結果を表３に示す。Examples 1 to 3 Cement was produced using the raw materials of the components shown in Table 1. Sewage sludge used the incinerated ash. Gypsum board waste was used as the sulfur-containing material. Table 2 shows the preparation of clinker raw materials. Since the characteristics of the clinker vary greatly depending on the three coefficients HM, SM, and IM, which are indicators of the main chemical components, the compounds were prepared so that all the coefficients were the same in Examples and Comparative Examples. HM is Ca
O / (SiO 2 + Al 2 O 3 + Fe 2 O 3 ), SM is SiO 2
/ (Al 2 O 3 + Fe 2 O 3 ), IM is Al 2 O 3 / Fe 2 O 3
It is. The blended material is 1450 in a rotary kiln
And fired at ° C., cooled, triturated with 3% by weight of dihydrate gypsum in the inner split, to obtain a cement Blaine specific surface area of 3300 cm 2 / g. The setting time and mortar compressive strength of the cement were measured according to JIS R5201-1997.
Table 3 shows the measurement results.
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【表２】 [Table 2]
【００２１】[0021]
【表３】 [Table 3]
【００２２】表３に示すように、ＳＯ3／Ｐ2Ｏ5の重量
比が０．７６〜０．８１である実施例１〜３では凝結時
間、圧縮強さ共に、リンを含有しない比較例１と比べ同
等の性状を示しており、硫黄源を所定量以上添加する
と、リンによる凝結時間の延長や初期強度の低下が改善
されていることが分かる。また、ＳＯ3／Ｐ2Ｏ5の重量
比が０．３０である比較例６と比べ、ＳＯ3／Ｐ2Ｏ5の
重量比が０．７６以上である実施例１〜３は改善効果が
高く、下水汚泥焼却灰の使用量が増加しても、凝結時間
の延長及び圧縮強さの低下を改善できることが分かる。
一方、ＳＯ3／Ｐ2Ｏ5の重量比が０．３０以下であるリ
ンを含む比較例２〜６はリンを含有しない比較例１と比
べ、凝結時間の延長と圧縮強さの低下が著しい。As shown in Table 3, in Examples 1 to 3 in which the weight ratio of SO 3 / P 2 O 5 is 0.76 to 0.81, both the setting time and the compressive strength are comparative examples containing no phosphorus. It shows the same properties as those of No. 1, and it can be seen that when the sulfur source is added in a predetermined amount or more, the extension of the setting time and the decrease in the initial strength due to phosphorus are improved. Further, as compared with Comparative Example 6 in which the weight ratio of SO 3 / P 2 O 5 is 0.30, Examples 1 to 3 in which the weight ratio of SO 3 / P 2 O 5 is 0.76 or more have improved effects. It is clear that even if the amount of sewage sludge incineration ash used increases, it is possible to improve the extension of the setting time and the decrease in the compressive strength.
On the other hand, in Comparative Examples 2 to 6 containing phosphorus in which the weight ratio of SO 3 / P 2 O 5 is 0.30 or less, the elongation of the setting time and the decrease in compressive strength are remarkable as compared with Comparative Example 1 containing no phosphorus. .
【００２３】実施例４〜６ 表１に示す原料の内、硫黄含有材料を除く原料と、カル
シウム含有材料として主原料としても使用した石灰石を
用い、下水汚泥スラッジにカルシウム含有材料を混合し
た場合のセメントを製造した。クリンカー原料の調合を
表４に示す。カルシウム含有材料を添加する場合にはカ
ルシウム含有材料の分だけ、石灰石以外の主要原料（珪
石、鉄滓、粘土）の総量をそれらの比率を変えずに少な
くした。セメントの調整及び凝結、圧縮強さの評価は実
施例１と同様に行った。その結果を表５に示す。Examples 4 to 6 Among the raw materials shown in Table 1, raw materials excluding a sulfur-containing material, limestone used also as a main raw material as a calcium-containing material, and a calcium-containing material mixed with sewage sludge sludge Cement was manufactured. Table 4 shows the preparation of clinker raw materials. When adding the calcium-containing material, the total amount of the main raw materials (silica, iron slag, clay) other than limestone was reduced without changing the ratio by the amount of the calcium-containing material. The adjustment of the cement, the setting, and the evaluation of the compressive strength were performed in the same manner as in Example 1. Table 5 shows the results.
【００２４】[0024]
【表４】 [Table 4]
【００２５】[0025]
【表５】 [Table 5]
【００２６】表５に示すように、ＣａＯ／Ｐ2Ｏ5の重量
比が０．７２である実施例４〜６では凝結時間、圧縮強
さ共に、リンを含有しない比較例１と比べほぼ同等の性
状を示しており、上記の硫黄源と同様にカルシウム源を
所定量以上添加すると、リンによる凝結時間の延長や初
期強度の低下が改善されていることが分かる。また、Ｃ
ａＯ／Ｐ2Ｏ5の重量比が０．３５である比較例１０と比
べ、ＣａＯ／Ｐ2Ｏ5の重量比が０．７２である実施例４
〜６は改善効果が高く、下水汚泥焼却灰の使用量が増加
しても、凝結時間の延長及び圧縮強さの低下を改善でき
ることが分かる。一方、ＣａＯ／Ｐ2Ｏ5の重量比が０．
００である比較例２、比較例７及び８はリンを含有しな
い比較例１と比べ、凝結時間の延長と圧縮強さの低下が
著しい。また、ＣａＯ／Ｐ2Ｏ5の重量比が０．１９であ
る比較例９及び０．３５である比較例１０でも、凝結時
間、圧縮強さ共にほとんど改善されないことが分かる。As shown in Table 5, in Examples 4 to 6 in which the weight ratio of CaO / P 2 O 5 was 0.72, both the setting time and the compressive strength were almost the same as those of Comparative Example 1 containing no phosphorus. This shows that when a calcium source is added in a predetermined amount or more in the same manner as the sulfur source, the extension of the setting time and the decrease in the initial strength due to phosphorus are improved. Also, C
aO / P 2 O weight ratio of 5 as compared with Comparative Example 10 is 0.35, CaO / P 2 weight ratio of O 5 is 0.72 Example 4
Nos. 6 to 6 have a high improvement effect, and it can be seen that even if the amount of sewage sludge incineration ash is increased, the coagulation time can be prolonged and the compression strength can be reduced. On the other hand, when the weight ratio of CaO / P 2 O 5 is 0.1.
In Comparative Examples 2, 7 and 8 which are 00, the setting time is prolonged and the compressive strength is significantly reduced as compared with Comparative Example 1 containing no phosphorus. Also, it can be seen that in Comparative Example 9 in which the weight ratio of CaO / P 2 O 5 is 0.19 and Comparative Example 10 in which the weight ratio is 0.35, both the setting time and the compressive strength are hardly improved.
【００２７】[0027]
【発明の効果】本発明により、下水汚泥スラッジやその
焼却灰をセメント原料として用いた際に、下水汚泥スラ
ッジ中に含まれるリンによるセメントの凝結遅延と初期
強度低下を改善することが可能となり、その結果、下水
汚泥スラッジのセメント原料としてのリサイクル可能量
が飛躍的に増加する。また、本発明のセメントの原料で
ある硫黄含有材料は、廃棄物や工場の副産物を用いるこ
とができるので、これらの有効利用も図れる。According to the present invention, when sewage sludge or incinerated ash thereof is used as a cement raw material, it is possible to improve the setting delay of cement and the decrease in initial strength due to phosphorus contained in sewage sludge sludge. As a result, the recyclable amount of sewage sludge as a cement raw material increases dramatically. In addition, since the sulfur-containing material which is a raw material of the cement of the present invention can be used as waste or by-product of a factory, it can be effectively used.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 本間 健一 千葉県佐倉市大作２丁目４番２号 太平洋 セメント株式会社佐倉研究所内 (72)発明者 野川 純 神奈川県川崎市川崎区浅野町１丁目１番地 第一セメント株式会社内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenichi Honma 2-4-2, Daisaku, Sakura-shi, Chiba Pref. Inside the Sakura Research Laboratories, Pacific Cement Co., Ltd. (72) Inventor Jun Nogawa 1-1-1, Asano-cho, Kawasaki-ku, Kawasaki-ku, Kanagawa-ken Address Daiichi Cement Co., Ltd.
Claims (4)
み、（硫黄含有材料からのＳＯ3量）／（下水汚泥スラ
ッジからのＰ2Ｏ5量）が重量比で０．５以上となるよう
に調整された原料を使用して製造されたポルトランドセ
メントクリンカー。Claims: 1. A method comprising the steps of: (1) containing sewage sludge and a sulfur-containing material such that (weight of SO 3 from sulfur-containing material) / (quantity of P 2 O 5 from sewage sludge) becomes 0.5 or more by weight. Portland cement clinker manufactured using conditioned ingredients.
を含み、（カルシウム含有材料からのＣａＯ量）／（下
水汚泥スラッジからのＰ2Ｏ5量）が重量比で０．６以上
となるように調整された原料を使用して製造されたポル
トランドセメントクリンカー。2. It contains sewage sludge and a calcium-containing material, and is adjusted so that (CaO amount from calcium-containing material) / (P 2 O 5 amount from sewage sludge) becomes 0.6 or more by weight ratio. Portland cement clinker manufactured using the used raw materials.
を含有する廃棄物もしくは副産物である請求項１記載の
セメントクリンカー。3. The cement clinker according to claim 1, wherein the sulfur-containing material is a waste or by-product containing 0.5% by weight or more of sulfur.
石こうと共に粉砕して得られるポルトランドセメント。4. Portland cement obtained by grinding the clinker according to claim 1, 2 or 3 together with gypsum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11114830A JP2000302491A (en) | 1999-04-22 | 1999-04-22 | Cement composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11114830A JP2000302491A (en) | 1999-04-22 | 1999-04-22 | Cement composition |
Publications (1)
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|---|---|
| JP2000302491A true JP2000302491A (en) | 2000-10-31 |
Family
ID=14647769
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11114830A Pending JP2000302491A (en) | 1999-04-22 | 1999-04-22 | Cement composition |
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|---|---|
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006001793A (en) * | 2004-06-17 | 2006-01-05 | Mitsubishi Materials Corp | Cement composition and cement kneaded product |
| WO2008050484A1 (en) * | 2006-10-24 | 2008-05-02 | Taiheiyo Cement Corporation | Cement clinker and cement |
| JP2009013023A (en) * | 2007-07-06 | 2009-01-22 | Tokuyama Corp | Portland cement clinker and its manufacturing method |
| JP2010042971A (en) * | 2008-08-18 | 2010-02-25 | Mitsubishi Materials Corp | Method for controlling operation of cement manufacturing apparatus and cement manufacturing apparatus |
| JP2012250912A (en) * | 2012-09-27 | 2012-12-20 | Mitsubishi Materials Corp | Operation control method of cement production apparatus, and the cement production apparatus |
-
1999
- 1999-04-22 JP JP11114830A patent/JP2000302491A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006001793A (en) * | 2004-06-17 | 2006-01-05 | Mitsubishi Materials Corp | Cement composition and cement kneaded product |
| WO2008050484A1 (en) * | 2006-10-24 | 2008-05-02 | Taiheiyo Cement Corporation | Cement clinker and cement |
| JP5624722B2 (en) * | 2006-10-24 | 2014-11-12 | 太平洋セメント株式会社 | Cement clinker and cement |
| KR101482530B1 (en) | 2006-10-24 | 2015-01-21 | 다이헤이요 세멘토 가부시키가이샤 | Cement clinker and cement |
| JP2009013023A (en) * | 2007-07-06 | 2009-01-22 | Tokuyama Corp | Portland cement clinker and its manufacturing method |
| JP2010042971A (en) * | 2008-08-18 | 2010-02-25 | Mitsubishi Materials Corp | Method for controlling operation of cement manufacturing apparatus and cement manufacturing apparatus |
| JP2012250912A (en) * | 2012-09-27 | 2012-12-20 | Mitsubishi Materials Corp | Operation control method of cement production apparatus, and the cement production apparatus |
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