JPH06100340A - Cement with hardly any slump loss - Google Patents

Cement with hardly any slump loss

Info

Publication number
JPH06100340A
JPH06100340A JP4249688A JP24968892A JPH06100340A JP H06100340 A JPH06100340 A JP H06100340A JP 4249688 A JP4249688 A JP 4249688A JP 24968892 A JP24968892 A JP 24968892A JP H06100340 A JPH06100340 A JP H06100340A
Authority
JP
Japan
Prior art keywords
cement
clinker
slump loss
weight
mineral composition
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.)
Withdrawn
Application number
JP4249688A
Other languages
Japanese (ja)
Inventor
Hisatsugu Yoshida
久嗣 吉田
Hidehiko Nakanaga
秀彦 中永
Etsuro Asakura
悦郎 朝倉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Materials Corp
Original Assignee
Mitsubishi Materials Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Materials Corp filed Critical Mitsubishi Materials Corp
Priority to JP4249688A priority Critical patent/JPH06100340A/en
Publication of JPH06100340A publication Critical patent/JPH06100340A/en
Withdrawn legal-status Critical Current

Links

Landscapes

  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

PURPOSE:To reduce the slump loss by providing a clinker mineral composition containing C3S, C2S, C3A and C4AF at a specific weight ratio. CONSTITUTION:Clinker raw materials such as lime stone, clay, quartzite and an iron raw material are mixed so as to provide a prescribed chemical composition and the obtained mixture is finely pulverized, then calcined in a burning furnace and subsequently burned at a prescribed temperature to provide a clinker. An adequate amount of gypsum is then added to the clinker and the prepared mixture is mixed and pulverized in a ball mill, etc., to afford the objective cement, having a clinker mineral composition of 51-57wt.% C3S, 20-26wt.% C2S, 6-8wt.% C3A and 11-13wt.% C4AF and capable of maintaining the high fluidity for a long period.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、スランプロス(水と混
練した後の流動性の経時的低下量)が少ないセメントに
関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cement having a small slump loss (the amount of decrease in fluidity with time after kneading with water).

【0002】[0002]

【従来の技術】コンクリート、モルタル或いはペースト
の調整にあたっては、その流動性を所定期間内におい
て、十分に確保すること、即ち、スランプロスが少ない
ことが常に要求される。
2. Description of the Related Art When adjusting concrete, mortar or paste, it is always required that the fluidity of the concrete, mortar or paste is sufficiently secured within a predetermined period, that is, slump loss is small.

【0003】従来、流動性を高めるための混和剤につい
ての研究は種々なされており、特に、高性能減水剤の開
発により、流動性を確保して高強度コンクリート(或い
はモルタル)を製造することが容易となった。
Conventionally, various studies have been conducted on admixtures for increasing fluidity, and in particular, development of a high-performance water reducing agent has made it possible to secure fluidity and produce high-strength concrete (or mortar). It became easier.

【0004】[0004]

【発明が解決しようとする課題】ところで、今後、コン
クリートやモルタル性能に対する要求は、増々多様化、
高度化されるものと予想される。従って、より一層優れ
た低スランプロス性を確保するためには、混和剤の開発
のみならず、セメント自体についての研究開発も当然必
要とされるものと考えられるが、従来において、コンク
リート、モルタル又はペーストのスランプロスを、セメ
ントないしはクリンカー鉱物組成との関連で調べた結果
が報告された例は少ない。
By the way, in the future, demands for concrete and mortar performance will become more diverse,
It is expected to be advanced. Therefore, in order to secure a further excellent low slump loss property, it is considered that not only the development of the admixture but also the research and development of the cement itself is naturally required, but conventionally, concrete, mortar or There are few reports on the results of investigating paste slump loss in relation to the composition of cement or clinker minerals.

【0005】本発明は上記従来の実情に鑑みてなされた
ものであって、スランプロスの少ないセメントを提供す
ることを目的とする。
The present invention has been made in view of the above conventional circumstances, and an object of the present invention is to provide a cement having a small slump loss.

【0006】[0006]

【課題を解決するための手段】本発明のスランプロスの
少ないセメントは、 C3 S 51〜57重量% C2 S 20〜26重量% C3 A 6〜 8重量% C4 AF 11〜13重量% なるクリンカー鉱物組成を有することを特徴とする。
The cement with low slump loss according to the present invention is C 3 S 51 to 57% by weight C 2 S 20 to 26% by weight C 3 A 6 to 8% by weight C 4 AF 11 to 13% by weight % Clinker mineral composition.

【0007】以下に本発明を詳細に説明する。The present invention will be described in detail below.

【0008】本発明のスランプロスの少ないセメント
は、常法に従って、石灰石、粘土、珪石及び鉄原料等の
クリンカー原料を調合し、粉砕、焼成してクリンカーを
調製し、得られたクリンカーに石膏等を添加して混合粉
砕するに当り、上記特定のクリンカー鉱物組成範囲とな
るように、原料配合を適宜調整することにより製造する
ことができる。
The cement with low slump loss according to the present invention is prepared by blending clinker raw materials such as limestone, clay, silica stone and iron raw materials according to a conventional method, crushing and firing to prepare clinker, and the obtained clinker is used for gypsum and the like. It can be produced by appropriately adjusting the raw material blending so that the above-mentioned specific clinker mineral composition range is obtained when adding and mixing.

【0009】以下に、本発明のスランプロスの少ないセ
メントのクリンカー鉱物組成範囲の限定理由について説
明する。
The reasons for limiting the clinker mineral composition range of the cement of the present invention with less slump loss will be explained below.

【0010】C3 Sが51重量%未満ではスランプロス
が大きく、57重量%を超えるとスランプが小さい。従
って、C3 Sは51〜57重量%とする。
When C 3 S is less than 51% by weight, the slump loss is large, and when it exceeds 57% by weight, the slump is small. Therefore, C 3 S is 51 to 57% by weight.

【0011】C2 Sが20重量%未満ではスランプが小
さく、26重量%を超えるとスランプロスが大きい。従
って、C2 Sは20〜26重量%とする。
If C 2 S is less than 20% by weight, the slump is small, and if it exceeds 26% by weight, the slump loss is large. Therefore, C 2 S is 20 to 26% by weight.

【0012】C3 Aが6重量%未満ではスランプロスが
大きく、8重量%を超えるとスランプが小さい。従っ
て、C3 Aは6〜8重量%とする。
When C 3 A is less than 6% by weight, the slump loss is large, and when it exceeds 8% by weight, the slump is small. Thus, C 3 A is a 6-8% by weight.

【0013】C4 AFが11重量%未満ではスランプが
小さく、13重量%を超えるとスランプロスが大きい。
従って、C4 AFは11〜13重量%とする。
When C 4 AF is less than 11% by weight, the slump is small, and when it exceeds 13% by weight, the slump loss is large.
Therefore, C 4 AF is set to 11 to 13% by weight.

【0014】なお、本発明のスランプロスの少ないセメ
ントは、上記特定のクリンカー鉱物組成を有するもので
あれば良く、クリンカーに石膏を混合粉砕したポルトラ
ンドセメントの他、高炉スラグ、フライアッシュ、ポゾ
ラン等を混合粉砕した高炉セメント、フライアッシュセ
メント、シリカセメント等の各種セメントに適用するこ
とができる。
The cement having a low slump loss of the present invention may be any cement having the above-mentioned specific clinker mineral composition, and other than Portland cement obtained by mixing and crushing gypsum in the clinker, blast furnace slag, fly ash, pozzolan, etc. It can be applied to various cements such as crushed blast furnace cement, fly ash cement, and silica cement.

【0015】このような本発明のスランプロスの少ない
セメントは、減水剤を用いて、水と所定割合で混練して
ペーストとするか、水及び細骨材と所定割合で混練して
モルタルとするか、或いは、水、細骨材及び粗骨材と所
定割合で混練してコンクリートとしてそれぞれ使用に供
される。
Such a cement having a low slump loss according to the present invention is kneaded with water at a predetermined ratio into a paste by using a water reducing agent, or mortar by kneading with water and fine aggregate at a predetermined ratio. Alternatively, it is kneaded with water, fine aggregate and coarse aggregate at a predetermined ratio and used as concrete.

【0016】なお、用いる減水剤としては特に制限はな
く、β−ナフタレンスルホン酸ホルムアルデヒド高縮合
物、リグニンスルホン酸化合物、メラミンスルホン酸縮
合物等を成分とする減水剤、AE減水剤、高性能減水
剤、高性能AE減水剤、流動化剤等の流動化に関する混
和剤を用いることができ、その添加割合はセメントに対
して0.1〜10.0重量%とするのが好ましい。
The water reducing agent to be used is not particularly limited, and a water reducing agent containing a β-naphthalene sulfonic acid formaldehyde high condensation product, a lignin sulfonic acid compound, a melamine sulfonic acid condensation product, etc., an AE water reducing agent, a high performance water reducing agent. An admixture for fluidization such as an agent, a high-performance AE water reducing agent, and a fluidizing agent can be used, and the addition ratio thereof is preferably 0.1 to 10.0% by weight based on cement.

【0017】[0017]

【作用】従来、一般に提供される普通ポルトランドセメ
ントのクリンカー鉱物組成は、平均値で下記表1に示す
値を示す。
The clinker mineral composition of ordinary Portland cement conventionally provided generally has the average value shown in Table 1 below.

【0018】これに対して、本発明のスランプロスの少
ないセメントのクリンカー鉱物組成であれば、著しくス
ランプロスの少ないセメントを得ることができる。
On the other hand, with the clinker mineral composition of the cement of the present invention with less slump loss, a cement with significantly less slump loss can be obtained.

【0019】[0019]

【表1】 [Table 1]

【0020】即ち、本発明者らは、コンクリート、モル
タル又はペーストのスランプロスと、クリンカー鉱物組
成との関係について鋭意検討を重ねた結果、クリンカー
鉱物組成において、C3 S/C2 S,C3 A/C4 AF
が小さいと注入初期の流動性は良いものの、スランプロ
スが大きいこと、C3 S/C2 S,C3 A/C4 AFが
大きいものは、スランプロスが小さい傾向にあることを
見出した。しかして、C3 S、C2 S、C3 A、C4
Fの各化合物組成の最適範囲について、更に検討した結
果、本発明に係る特定クリンカー鉱物組成であれば、ス
ランプロスを少なくすることができることを知見し、本
発明を完成させた。
That is, the present inventors have conducted extensive studies on the relationship between the slump loss of concrete, mortar or paste and the clinker mineral composition, and as a result, in the clinker mineral composition, C 3 S / C 2 S, C 3 A / C 4 AF
It was found that the slump loss tends to be small when C is small, although the fluidity in the initial stage of injection is good, but the slump loss is large, and those with large C 3 S / C 2 S and C 3 A / C 4 AF tend to have a small slump loss. Then, C 3 S, C 2 S, C 3 A, C 4 A
As a result of further examination of the optimum range of each compound composition of F, it was found that slump loss can be reduced with the specific clinker mineral composition according to the present invention, and the present invention was completed.

【0021】[0021]

【実施例】以下に実施例及び比較例を挙げて本発明をよ
り具体的に説明する。
EXAMPLES The present invention will be described more specifically with reference to Examples and Comparative Examples below.

【0022】実施例1 石灰石、粘土、珪石及び鉄原料を、所定の主要化学組成
になるように調合し、それをテストミルで微粉砕後に、
1000℃の電気炉で1.5時間仮焼してから遊離石灰
が1.0%以下になるまで1450℃で焼成して、クリ
ンカーを得た。このクリンカーに試薬の二水石膏を添加
してボールミルで混合粉砕し、SO3 量が2.0%、ブ
レーン値が3200±100cm2 /gで、表2に示す
クリンカー鉱物組成のセメントを製造した。
Example 1 Limestone, clay, silica and iron raw materials were mixed so as to have a predetermined main chemical composition, and after finely pulverized with a test mill,
It was calcined in an electric furnace at 1000 ° C. for 1.5 hours and then calcined at 1450 ° C. until free lime became 1.0% or less, to obtain a clinker. Gypsum as a reagent was added to this clinker and mixed and pulverized with a ball mill to produce a cement having a clinker mineral composition shown in Table 2 with an SO 3 amount of 2.0% and a Blaine value of 3200 ± 100 cm 2 / g. .

【0023】このセメントを用いて、下記に示す配合
で、それぞれ、ペースト、モルタル及びコンクリートを
調製し、10分後及び40分後の各々の流動性を測定
し、結果を表2に示した。なお、減水剤としては、花王
(株)製高性能減水剤「マイテイ150」を使用した。
Using this cement, pastes, mortars and concretes were prepared in the respective formulations shown below, and their respective fluidities were measured after 10 minutes and 40 minutes, and the results are shown in Table 2. As the water reducing agent, a high performance water reducing agent “Mighty 150” manufactured by Kao Corporation was used.

【0024】ペースト配合:セメント+水+減水剤 水/セメント=50% 減水剤=セメントに対して1.0%モルタル配合 :セメント+水+細骨材(豊浦標準砂)+
減水剤 水/セメント=50% 減水剤=セメントに対して1.0% 細骨材/セメント=1.4コンクリート配合 :セメント+水+細骨材(木更津山
砂)+粗骨材(八王子砕石)+減水剤 水/セメント=50% 減水剤=セメントに対して1.0% 細骨材/セメント=1.4 細骨材/(細骨材+粗骨材)=1
Paste composition: Cement + water + water reducing agent Water / cement = 50% Water reducing agent = 1.0% to cement Mortar composition: cement + water + fine aggregate (Toyoura standard sand) +
Water-reducing agent Water / cement = 50% Water-reducing agent = 1.0% based on cement Fine aggregate / cement = 1.4 Concrete composition: Cement + water + fine aggregate (Kisarazuyama sand) + coarse aggregate (Hachioji crushed stone) ) + Water reducing agent Water / cement = 50% Water reducing agent = 1.0% of cement Fine aggregate / cement = 1.4 Fine aggregate / (fine aggregate + coarse aggregate) = 1

【0025】[0025]

【表2】 [Table 2]

【0026】表2より、本発明によれば、ペースト、モ
ルタル、コンクリートいずれの場合においても、著しく
スランプロスの少ない、高流動性を長期にわたり維持し
得るセメントを得ることができることが明らかである。
From Table 2, it is clear that according to the present invention, it is possible to obtain a cement having a significantly low slump loss and capable of maintaining high fluidity for a long period of time in any case of paste, mortar and concrete.

【0027】[0027]

【発明の効果】以上詳述した通り、本発明のスランプロ
スの少ないセメントによれば、著しくスランプロスが少
なく、高流動性を長期にわたり維持し得るフレッシュセ
メント、フレッシュモルタル或いはフレッシュコンクリ
ートが提供される。
As described in detail above, according to the cement having a low slump loss of the present invention, there is provided a fresh cement, a fresh mortar or a fresh concrete which has a significantly low slump loss and can maintain high fluidity for a long period of time. .

【0028】本発明のスランプロスの少ないセメント
は、セメントの流動性の経時特性をクリンカー鉱物組成
の面から改良した新規セメントであって、その工業的有
用性は極めて大である。
The cement with low slump loss according to the present invention is a novel cement in which the aging characteristics of the fluidity of the cement are improved from the viewpoint of the clinker mineral composition, and its industrial utility is extremely large.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 C3 S 51〜57重量% C2 S 20〜26重量% C3 A 6〜 8重量% C4 AF 11〜13重量% なるクリンカー鉱物組成を有するスランプロスの少ない
セメント。
1. A cement with a low slump loss having a clinker mineral composition of C 3 S 51 to 57% by weight C 2 S 20 to 26% by weight C 3 A 6 to 8% by weight C 4 AF 11 to 13% by weight.
JP4249688A 1992-09-18 1992-09-18 Cement with hardly any slump loss Withdrawn JPH06100340A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4249688A JPH06100340A (en) 1992-09-18 1992-09-18 Cement with hardly any slump loss

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4249688A JPH06100340A (en) 1992-09-18 1992-09-18 Cement with hardly any slump loss

Publications (1)

Publication Number Publication Date
JPH06100340A true JPH06100340A (en) 1994-04-12

Family

ID=17196730

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4249688A Withdrawn JPH06100340A (en) 1992-09-18 1992-09-18 Cement with hardly any slump loss

Country Status (1)

Country Link
JP (1) JPH06100340A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102701617A (en) * 2012-06-29 2012-10-03 漳州正霸建材科技有限公司 Calcination production line and calcination method for industrial by-product gypsum

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102701617A (en) * 2012-06-29 2012-10-03 漳州正霸建材科技有限公司 Calcination production line and calcination method for industrial by-product gypsum

Similar Documents

Publication Publication Date Title
EP1019334B1 (en) Use of hydroxylamines to enhance the strength of portland cement compositions
MXPA04010946A (en) Rapid setting cementitious composition.
RU2732386C1 (en) Concrete composition and method for production thereof
WO1986000291A1 (en) Improvements in or relating to organic compounds for cement mixes
JPH06100338A (en) Highly fluid cement
JP4585905B2 (en) Mortar or concrete
JP2004292307A (en) Hydraulic composition
JP3975087B2 (en) High performance concrete
JP4494743B2 (en) Method for producing cement composition
JPH0680456A (en) Fluid hydraulic composition
JP7103869B2 (en) Cement composition
JP3970616B2 (en) High performance concrete
JP4462746B2 (en) Method for producing cement clinker, cement clinker and cement composition
CN118019720A (en) Concrete admixture
JPH06100340A (en) Cement with hardly any slump loss
US4019917A (en) Early strength cements
JP3385920B2 (en) Wet spraying method
JP4679707B2 (en) High-strength cement admixture and cement composition using the same
JP4709359B2 (en) Hydraulic composition
JPH07157347A (en) Cement composition, production and hardened body thereof
JPH01275456A (en) Quick hardening cement composition
RU2746338C1 (en) Method of preparation of portland cement binder with the addition of high-calcium ash of thermal power plants (options)
JPH107446A (en) Cement additive and use of the same
JPH06100339A (en) Highly fluid cement
JP3907287B2 (en) Method for producing highly fluid hydraulic composition

Legal Events

Date Code Title Description
A300 Withdrawal of application because of no request for examination

Free format text: JAPANESE INTERMEDIATE CODE: A300

Effective date: 19991130