JPH11139859A - Very quick-hardening cement composition - Google Patents
Very quick-hardening cement compositionInfo
- Publication number
- JPH11139859A JPH11139859A JP30181097A JP30181097A JPH11139859A JP H11139859 A JPH11139859 A JP H11139859A JP 30181097 A JP30181097 A JP 30181097A JP 30181097 A JP30181097 A JP 30181097A JP H11139859 A JPH11139859 A JP H11139859A
- Authority
- JP
- Japan
- Prior art keywords
- ultra
- fly ash
- cement
- cement composition
- setting 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
- 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
- C04B28/06—Aluminous cements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- 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)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、超速硬性セメント
組成物に関し、さらに詳しく述べるならば、セメントモ
ルタル状態において混練後２０分でも高流動性を示し、
かつその硬化において２時間の高短期強度発現性を有す
る超速硬性セメント組成物に関するものである。The present invention relates to an ultra-fast setting cement composition. More specifically, the present invention shows high fluidity even after 20 minutes of kneading in a cement mortar state,
The present invention also relates to an ultra-rapid hardening cement composition having a high-short-term strength development of 2 hours in its hardening.
【０００２】[0002]
【従来の技術】道路、道路橋、隧道等コンクリート構造
物の補修・補強工事における空隙充填用としてグラウト
材を使用する場合、交通の遮断から開放までの時間を極
力短くすることが必要である。この為にグラウト材に要
求される物性としては、終局強度、耐久性等を満たすこ
とは当然として、特に（１）空隙に隙間なく確実に充填
できるために、所定作業時間内の高流動性が確保できる
こと。（２）極力短時間で強度が発現すること。の２点
が重要である。このようなセメントモルタルの流動性問
題を解決するために、従来、化学混和剤として、減水
剤、例えばナフタリンスルホン酸塩系減水剤を混入して
単位水量を増大させることなく流動性を向上させ、或は
流動性を低下させることなく単位水量を減少させること
が行われている。しかし、化学混和剤の使用による流動
性の向上には限界がある。2. Description of the Related Art When grouting material is used for filling gaps in repairing and reinforcing works of concrete structures such as roads, road bridges and tunnels, it is necessary to minimize the time from interruption to opening of traffic as much as possible. For this reason, the physical properties required of the grout material include, naturally, satisfying the ultimate strength, durability and the like. In particular, (1) Since the voids can be reliably filled without gaps, high fluidity within a predetermined working time is required. What can be secured. (2) Strength is developed in a short time as much as possible. The two points are important. In order to solve the fluidity problem of such cement mortar, conventionally, as a chemical admixture, a water reducing agent, for example, a naphthalene sulfonate-based water reducing agent is mixed to improve the flowability without increasing the unit water amount, Alternatively, the unit water amount is reduced without reducing the fluidity. However, there is a limit to the improvement of fluidity by using a chemical admixture.
【０００３】一方、セメントモルタルの流動性の改善
に、フライアッシュを用いることが知られている。例え
ば、特開昭６３−８２４８号、特開平３−１２６６５２
号及び特開平４−２６４２号等である。ここで使用され
ているフライアッシュのうち、粒径が２０ミクロン以下
のもの、特に、１０ミクロン以下のものは本発明のフラ
イアッシュを包含している。またセメントへの配合率も
ほゞ重複している。しかしこれの適用は一般的なモルタ
ル及びコンクリートになされたものであり、本発明の如
く超速硬セメントへ配合して高流動性と高短期強度を満
す優れたグラウト材としての適用を図る特殊な用途では
ない。即ち、発明の課題が異なっている。一方、フライ
アッシュおよび混和剤を超速硬性結合材へ適用した例と
して特開昭５４−１３２９号がある。しかしこの先願発
明ではフライアッシュを使用しているが一般市販品であ
り、本発明と相違する。また配合率は２．０〜１５％と
本発明と一部重複するものの適用範囲に於いて大きく異
なる。なお本願発明で課題としている２時間の短期強度
は先願発明には一切開示されていない。またＳＯ3／Ａ
ｌ2 Ｏ3 の範囲が重複するものの、その望ましい範囲に
は隔たりが認められる。これは先願発明では無収縮性を
発明の課題にしたためであり、この結果２時間の短期強
度発現には不利となる。一方本発明は２時間の短期強度
発現を課題にしたもので、この点で本願発明は先願発明
とは明らかに解決しようとしている課題において異なる
のである。On the other hand, it is known to use fly ash to improve the fluidity of cement mortar. For example, JP-A-63-8248, JP-A-3-126652.
And JP-A-4-2642. Of the fly ash used herein, those having a particle size of 20 microns or less, particularly 10 microns or less, include the fly ash of the present invention. In addition, the compounding ratio in cement almost overlaps. However, this is applied to general mortar and concrete, and it is a special grout material which is blended with ultra-rapid hardening cement as in the present invention to achieve application as an excellent grout material satisfying high fluidity and high short-term strength. Not a use. That is, the subject of the invention is different. On the other hand, Japanese Patent Application Laid-Open No. 54-1329 discloses an example in which fly ash and an admixture are applied to an ultra-fast setting binder. However, although fly ash is used in this prior application, it is a general commercial product, which is different from the present invention. The compounding ratio is 2.0 to 15%, which partially overlaps with the present invention, but greatly differs in the applicable range. The short-term intensity of 2 hours, which is the subject of the present invention, is not disclosed at all in the prior invention. Also SO 3 / A
Although the range of l 2 O 3 overlaps, the desired range is separated. This is because the prior application made non-shrinkage an object of the invention, and as a result, it is disadvantageous for short-term strength development of 2 hours. On the other hand, the present invention is aimed at developing a short-term intensity of 2 hours, and in this regard, the present invention differs from the prior invention in the problem to be solved.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、超速硬性セ
メント、細骨材、フライアッシュ及び化学混和剤を含む
セメント組成物において、グラウト材の充填の際に、混
練後２０分でも細部流入を確実にする高い流動性を有
し、しかも２時間の短時間で所望の強度を発現すること
が可能な超速硬性セメント組成物を提供しようとするも
のである。SUMMARY OF THE INVENTION The present invention relates to a cement composition containing ultra-fast-setting cement, fine aggregate, fly ash and a chemical admixture. It is an object of the present invention to provide an ultra-rapid hardening cement composition which has a high fluidity to ensure it and is capable of developing a desired strength in a short time of 2 hours.
【０００５】[0005]
【課題を解決するための手段】本発明に係る超速硬性セ
メント組成物は、超速硬性セメントと、細骨材と、フラ
イアッシュと、化学混和剤とを含み、前記フライアッシ
ュが、分級して捕集された粒径１０μｍ以下の微粒粉で
あり、かつ前記フライアッシュ微粒分の含有量が、前記
超速硬性セメントと前記フライアッシュ微粒分との合計
重量に対し１０〜４０重量％であることを特徴とするも
のである。これにより混練後２０分でも高い流動性が得
られるのである。本発明の超速硬性セメント組成物にお
いて、この超速硬性セメント組成物の全重量に対して、
前記超速硬性セメントと前記フライアッシュ微粒分の合
計含有量が、５０〜９０重量％であることが好ましい。
また、本発明の超速硬性セメント組成物において、前記
超速硬性セメントが主成分として、１２ＣａＯ・７Ａｌ
2 Ｏ3 、１１ＣａＯ・７Ａｌ2 Ｏ3 ・ＣａＸ2（但し、
Ｘはハロゲン元素を表す）、３ＣａＯ・３Ａｌ2 Ｏ3 ・
ＣａＳＯ4 および非晶質カルシウムアルミネートの中か
ら選ばれた少なくとも一種を含んでいる。さらにセメン
ト中のＳＯ3 ／Ａｌ2 Ｏ3 （モル比）を１．０〜１．
３、好ましくは１．０〜１．２と低目の範囲にしてい
る。これにより２時間の短期強度を確保できるのであ
る。又、前記細骨材が珪砂であり、かつ前記化学混和剤
が減水剤であることが好ましく、前記細骨材の含有量が
５〜５０重量％であり、かつ前記化学混和剤の含有量が
０．１〜５重量％であることが好ましい。The ultra-fast setting cement composition according to the present invention comprises an ultra-fast setting cement, fine aggregate, fly ash and a chemical admixture, and the fly ash is classified and trapped. The collected fine powder having a particle size of 10 μm or less, and the content of the fly ash fine particles is 10 to 40% by weight based on the total weight of the ultra-fast-hardening cement and the fly ash fine particles. It is assumed that. Thereby, high fluidity can be obtained even 20 minutes after kneading. In the ultra-fast setting cement composition of the present invention, based on the total weight of the ultra-fast setting cement composition,
It is preferable that the total content of the ultrafast-setting cement and the fly ash fine particles is 50 to 90% by weight.
Further, in the ultra-rapid hardening cement composition of the present invention, the ultra-rapid hardening cement contains 12CaO · 7Al
2 O 3 , 11CaO · 7Al 2 O 3 · CaX 2 (however,
X represents a halogen element) 3CaO.3Al 2 O 3.
It contains at least one selected from CaSO 4 and amorphous calcium aluminate. Further, the SO 3 / Al 2 O 3 (molar ratio) in the cement was adjusted to 1.0 to 1.
3, preferably in the low range of 1.0 to 1.2. Thereby, short-term intensity of 2 hours can be secured. Preferably, the fine aggregate is silica sand, and the chemical admixture is a water reducing agent, the content of the fine aggregate is 5 to 50% by weight, and the content of the chemical admixture is It is preferably 0.1 to 5% by weight.
【０００６】[0006]
【発明の実施の形態】本発明の超速硬性セメント組成物
に用いられる超速硬性セメントは、好ましくは、１２Ｃ
ａＯ・７Ａｌ2 Ｏ3 、１１ＣａＯ・７Ａｌ2 Ｏ3 ・Ｃａ
Ｘ2 （但し、Ｘはハロゲン元素を表す）、３ＣａＯ・３
Ａｌ2 Ｏ3 ・ＣａＳＯ4 および非晶質カルシウムアルミ
ネートの中から選ばれた少なくとも一種を含むものであ
る。さらに超速硬性セメントのＳＯ3 ／Ａｌ2 Ｏ3 （モ
ル比）が１．０〜１．３、好ましくは１．０〜１．２と
低めの範囲にしている。また、本発明の超速硬性セメン
ト組成物に用いられる細骨材は、珪砂を基本とするもの
であって、その他に石灰岩や安山岩などの砕砂、高炉ス
ラグ砕砂、フェロニッケルスラグ砕砂などを単独、また
は組合せて用いることができる。BEST MODE FOR CARRYING OUT THE INVENTION The ultra-fast setting cement used in the ultra-fast setting cement composition of the present invention is preferably 12C.
aO · 7Al 2 O 3, 11CaO · 7Al 2 O 3 · Ca
X 2 (where X represents a halogen element) 3CaO · 3
It contains at least one selected from Al 2 O 3 .CaSO 4 and amorphous calcium aluminate. Further, the SO 3 / Al 2 O 3 (molar ratio) of the ultra-fast setting cement is set to a low range of 1.0 to 1.3, preferably 1.0 to 1.2. The fine aggregate used in the ultra-rapid hardening cement composition of the present invention is based on silica sand, and crushed sand such as limestone and andesite, blast furnace slag crushed sand, ferronickel slag crushed sand, or the like alone, or It can be used in combination.
【０００７】本発明の超速硬性セメント組成物に用いら
れるフライアッシュ微粒分は、フライアッシュを分級し
て、粒径１０μｍ以下の微粒を捕集したものである。以
下、粒径１０μｍ以下のフライアッシュ分級捕集分をフ
ライアッシュ微粒分と記す。本発明においては、このよ
うな特定フライアッシュ微粒分が、セメントモルタルの
流動性を向上させる。また水を増やさずに混練ができる
ので２時間の短期強度達成にも有効なものとなるのであ
る。[0007] The fine fly ash used in the ultra-fast setting cement composition of the present invention is obtained by classifying fly ash and collecting fine particles having a particle size of 10 µm or less. Hereinafter, a fly ash classified and collected having a particle size of 10 μm or less is referred to as a fly ash fine particle. In the present invention, such specific fly ash fine particles improve the fluidity of cement mortar. In addition, since kneading can be performed without increasing water, it is effective for achieving short-term strength of 2 hours.
【０００８】本発明の超速硬性セメント組成物に用いら
れる化学混和剤は、減水剤、（例えばナフタリンスルホ
ン酸塩系、リグニンスルホン酸系、ポリカルボン酸エー
テル系など）及びＡＥ減水剤、高性能ＡＥ減水剤など、
並びに流動化剤、遅延剤などから選択することができ
る。また減水剤と遅延剤を併用するなど、複数を選択す
ることもできる。[0008] The chemical admixture used in the ultra-fast setting cement composition of the present invention is a water reducing agent (for example, naphthalene sulfonate type, lignin sulfonic acid type, polycarboxylic acid ether type, etc.) and AE water reducing agent, high performance AE. Water reducing agent,
As well as fluidizers, retarders and the like. A plurality can be selected, such as using a water reducing agent and a retarder together.
【０００９】本発明の超速硬性セメント組成物に含まれ
るフライアッシュ微粒分の量は、超速硬性セメントとフ
ライアッシュ微粒分との合計重量に対し、１０〜４０重
量％であり、１５〜３０重量％であることが好ましい。
フライアッシュ微粒分の量が、上記合計重量に対し、１
０重量％未満であるときは、混練後２０分の流動性向上
効果及び２時間の短期強度発現性の両方において不十分
になり、またそれが４０重量％を超えると、得られるモ
ルタルの２時間の短期強度及び長期強度の両方が不十分
になる。The amount of the fly ash fine particles contained in the ultra-fast setting cement composition of the present invention is 10 to 40% by weight, and 15 to 30% by weight based on the total weight of the ultra-fast setting cement and the fly ash fine particles. It is preferred that
The amount of fly ash fine particles is 1
When the amount is less than 0% by weight, both the fluidity improving effect of 20 minutes after kneading and the short-term strength development of 2 hours become insufficient, and when it exceeds 40% by weight, the resulting mortar for 2 hours Both the short-term and long-term strength of
【００１０】本発明において、超速硬性セメントとフラ
イアッシュ微粒分との合計含有量は、超速硬性セメント
組成物の全重量に対し、５０〜９０重量％であることが
好ましく、６０〜８０重量％であることがより好まし
い。上記合計含有率が５０重量％未満であるときは、十
分なモルタルの２時間の短期強度及び長期強度の両方が
低下するという不都合があり、またそれが、９０重量％
を超えると、混練後２０分の流動性が低下して細部迄確
実に流入できないという不都合を生ずる。In the present invention, the total content of the ultra-fast setting cement and the fly ash fine particles is preferably 50 to 90% by weight, more preferably 60 to 80% by weight, based on the total weight of the ultra-fast setting cement composition. More preferably, there is. When the total content is less than 50% by weight, there is a disadvantage that both the short-term strength and the long-term strength of a sufficient mortar for 2 hours are reduced, and it is 90% by weight.
If it exceeds 40, there is a disadvantage that the fluidity of the mixture 20 minutes after the kneading is lowered and it is not possible to reliably flow into the details.
【００１１】本発明の超速硬性セメント組成物におい
て、細骨材の含有量は５〜５０重量％であることが好ま
しく、１０〜４０重量％であることがより好ましい。こ
れは、超速硬性セメントの含有量が上記範囲外である
と、得られるセメント組成物の、グラウト材としての混
練後２０分の高流動性と２時間の短期強度などの物性が
不十分になるからである。[0011] In the ultra-fast-setting cement composition of the present invention, the content of the fine aggregate is preferably 5 to 50% by weight, more preferably 10 to 40% by weight. This is because if the content of the ultra-fast setting cement is out of the above range, the resulting cement composition will have insufficient physical properties such as high fluidity of 20 minutes after kneading as a grout material and short-term strength of 2 hours after kneading. Because.
【００１２】本発明の超速硬性セメント組成物に含まれ
る化学混和剤は、通常０．１〜５．０重量％の含有量で
用いられることが好ましく、より好ましい含有量は０．
５〜３．０重量％である。The chemical admixture contained in the ultra-fast-setting cement composition of the present invention is preferably used in an amount of usually 0.1 to 5.0% by weight, more preferably 0.1 to 5.0% by weight.
5 to 3.0% by weight.
【００１３】本発明の超速硬性セメント組成物は、上述
のように、それを水と混練して硬化させるとき、きわめ
て良好な流動性を示し、しかも短期強度の発現がきわめ
て迅速に行われる。すなわち混練開始から２０分後の流
動性はＰＣグラウトの流動性試験方法により測定された
ＪＡロート流下時間により表すと目標基準値である、２
０秒以下であり、通常は１６〜２０秒であり、また、そ
の２時間の短期強度発現性は、コンクリートの圧縮強度
試験方法により測定された値により表すと、目標基準値
である４５ kgf／cm2 以上であり、通常は４５〜７０ k
gf／cm2 である。本発明の超速硬性セメント組成物の上
記のようなすぐれた流動性と短期強度発現性は、本発明
において、フライアッシュの１０μｍ以下の特定微粒分
を用いること、及びＳＯ3 ／Ａｌ2 Ｏ3 （モル比）が
１．０〜１．３の超速硬性セメントを用い、且つこれら
を細骨材、混和剤と適度に配合した組成物を用いること
によって得ることができる。As described above, when the cement composition of the present invention is kneaded with water and hardened, it exhibits extremely good fluidity, and very quickly develops short-term strength. That is, the fluidity 20 minutes after the start of the kneading is a target reference value when expressed by the JA funnel falling time measured by the fluidity test method of PC grout.
0 seconds or less, usually 16 to 20 seconds, and the short-term strength development of 2 hours is represented by the value measured by the compressive strength test method for concrete, which is the target standard value of 45 kgf / cm 2 or more, usually 45-70 k
gf / cm 2 . The excellent fluidity and short-term strength development of the ultra-rapid hardening cement composition of the present invention are as follows. In the present invention, the use of specific fine particles of fly ash of 10 μm or less and the use of SO 3 / Al 2 O 3 ( (Molar ratio) of 1.0 to 1.3, and can be obtained by using a composition in which these are appropriately blended with a fine aggregate and an admixture.
【００１４】本発明の超速硬性セメント組成物は、所望
量を混合して調製することができる。この混合の条件、
混合機の種類などに限定はなく、セメント用ミキサー、
ハンドミキサー、ポットミルなどの慣用の混合機を用い
ることができる。本発明の超速硬性セメント組成物から
所望のグラウト材を作製するには、この超速硬性セメン
ト組成物に、水および必要により遅延剤を混練してスラ
リー化し、セメントモルタルを調製し、これを所望の成
形型又は枠中に流し込んで充填し、硬化させる。上記混
練、及び充填には、従来の超速硬性セメント組成物に用
いられる手段及び条件を用いればよい。一般に混練は０
〜３５℃において行われるが、セメントモルタルの硬化
反応速度は、その温度により変動するから、硬化反応時
間を所望時間にコントロールするためには、練混ぜ水の
温度及び遅延剤の添加量を適宜に調節すればよい。ま
た、グラウト材を作製する際には、調製されるセメント
モルタルの量が少量であるから、ハンドミキサーを用い
ればよい。The ultra-fast setting cement composition of the present invention can be prepared by mixing desired amounts. The conditions of this mixing,
There is no limitation on the type of mixing machine, etc.
Conventional mixers such as a hand mixer and a pot mill can be used. In order to prepare a desired grout material from the ultra-rapid hardening cement composition of the present invention, the ultra-rapid hardening cement composition is kneaded with water and, if necessary, a retarder to form a slurry, and a cement mortar is prepared. It is poured into a mold or frame, filled and cured. The kneading and filling may be performed by using the means and conditions used for a conventional ultra-fast-setting cement composition. Generally no kneading
The reaction is carried out at a temperature of ~ 35 ° C. Since the setting reaction speed of the cement mortar varies depending on the temperature, in order to control the setting reaction time to a desired time, the temperature of the mixing water and the amount of the retarder added are appropriately adjusted. Just adjust it. When preparing the grout material, a hand mixer may be used because the amount of the prepared cement mortar is small.
【００１５】[0015]
【実施例】本発明を下記実施例によりさらに説明する。実施例１〜８及び比較例１〜９ 実施例１〜８及び比較例１〜９の各々において、下記成
分を表１に記載の量により混合して超速硬性セメント組
成物を調製した。 （１）超速硬性セメント １１ＣａＯ・７Ａｌ2 Ｏ3 ・ＣａＦ2 を主成分とするも
の、 （２）細骨材 平均粒子径が３００μｍの珪砂 （３）フライアッシュ （イ）粒径１０μｍ以下に分級された微粒分（本発明） （ロ）分級を行わない市販の一般のフライアッシュ（比
較例） （４）化学混和剤 ナフタリンスルホン酸塩系 を主成分とする減水剤。The present invention will be further described with reference to the following examples. Examples 1 to 8 and Comparative Examples 1 to 9 In each of Examples 1 to 8 and Comparative Examples 1 to 9, the following components were mixed in the amounts shown in Table 1 to prepare an ultrafast-setting cement composition. (1) as a main component ultra rapid hardening cement 11CaO · 7Al 2 O 3 · CaF 2, (2) fine aggregate average particle diameter is classified to the following 300μm quartz sand (3) fly ash (i) particle size 10μm (B) Commercial fly ash not subjected to classification (Comparative Example) (4) Chemical admixture A water reducing agent containing a naphthalenesulfonic acid salt as a main component.
【００１６】実施例及び比較例の各々において、それぞ
れのセメント組成物１００重量部に対し、３２重量部の
水を、２０℃において混練し、得られたセメントモルタ
ルを、混練開始から２０分後に前記流動性テストに供
し、また混練開始から２時間後に、得られた硬化物を強
度テストに供した。得られたテスト結果を表１に示す。In each of the examples and comparative examples, 32 parts by weight of water was kneaded at 20 ° C. with respect to 100 parts by weight of each cement composition, and the obtained cement mortar was cooled 20 minutes after the start of kneading. The resulting cured product was subjected to a fluidity test and 2 hours after the start of kneading, and was subjected to a strength test. Table 1 shows the obtained test results.
【００１７】[0017]
【表１】 [Table 1]
【００１８】表１に示されているように、本発明に係る
実施例１〜８の超速硬性セメント組成物は、混練２０分
後においても、品質基準としたＪＡロート流下時間２０
秒以下の良好な流動性を示し、かつ、混練２時間後にお
いて、品質基準とした４５ kgf／cm2 以上の良好な圧縮
強度を示し、短期強度発現性が良好であった。これに対
し、比較例６においては、分級を行わない市販の一般フ
ライアッシュを用いたため、混練２０分後のＪＡロート
流下時間が２０秒より長く流動性が劣っていた。比較例
１，２は超速硬性セメントのＳＯ3 ／Ａｌ2 Ｏ3 （モル
比）が低過ぎる為に２０分後の流動性が不良であり、ま
た２時間圧縮強度も基準値を下まわった。比較例３は１
０μｍ以下のフライアッシュを配合していない為に２０
分後の流動性が不良であった。比較例４，５，８も１０
μｍ以下のフライアッシュが配合されていないか、配合
量が少ない為に２０分後の流動性が不良であった。比較
例７は１０μｍ以下のフライアッシュの配合量が多過ぎ
た為に２時間の圧縮強度が基準値を下まわった。比較例
９は超速硬性セメントのＳＯ3 ／Ａｌ2 Ｏ 3 （モル比）
が高過ぎる為に２時間の圧縮強度がかなり低下した。As shown in Table 1, according to the present invention,
The ultra-fast setting cement compositions of Examples 1 to 8 were kneaded for 20 minutes.
Even after that, the JA funnel flow time 20
Shows good fluidity of less than 2 seconds, and 2 hours after kneading
45 kgf / cmTwoGood compression above
The strength was good, and short-term strength development was good. Against this
However, in Comparative Example 6, a commercially available general filter without classification was used.
JA funnel 20 minutes after kneading because lyash was used
The flow time was longer than 20 seconds and the fluidity was poor. Comparative example
1 and 2 are SO of ultra-fast setting cementThree/ AlTwoOThree(Mol
Ratio) is too low and the fluidity after 20 minutes is poor.
The 2-hour compressive strength also fell below the reference value. Comparative Example 3 is 1
20 as no fly ash less than 0μm
The fluidity after minutes was poor. Comparative Examples 4, 5, and 8 are also 10
Check if fly ash less than μm
The fluidity after 20 minutes was poor due to the small amount. Comparison
Example 7 has too much fly ash of 10 μm or less
As a result, the compressive strength for 2 hours was below the reference value. Comparative example
9 is SO of super-hardening cementThree/ AlTwoO Three(Molar ratio)
Was too high and the 2 hour compressive strength was significantly reduced.
Claims (5)
アッシュと、化学混和剤とを含み、 前記フライアッシュが、分級された粒径１０μｍ以下の
微粒分であり、かつ前記フライアッシュ微粒分の含有量
が、前記超速硬性セメントと前記フライアッシュ微粒分
との合計重量に対し１０〜４０重量％である、 ことを特徴とする超速硬性セメント組成物。Claims: 1. An ultra-fast setting cement, fine aggregate, fly ash, and a chemical admixture, wherein the fly ash is a classified fine particle having a particle size of 10 μm or less, and the fly ash fine particle Is from 10 to 40% by weight based on the total weight of the ultra-fast setting cement and the fly ash fine particles.
対して、前記超速硬性セメントと前記フライアッシュ微
粒分の合計含有量が、５０〜９０重量％である、請求項
１に記載の超速硬性セメント組成物。2. The ultra-fast setting cement according to claim 1, wherein the total content of the ultra-fast setting cement and the fly ash fine particles is 50 to 90% by weight based on the total weight of the ultra-fast setting cement composition. Cement composition.
１２ＣａＯ・７Ａｌ 2 Ｏ3 、１１ＣａＯ・７Ａｌ2 Ｏ3
・ＣａＸ2 （但し、Ｘはハロゲン元素を表す）、３Ｃａ
Ｏ・３Ａｌ2 Ｏ3 ・ＣａＳＯ4 、および非晶質カルシウ
ムアルミネートから選ばれた少なくとも一種を含み、前
記細骨材が珪砂であり、かつ前記化学混和剤が減水剤で
ある、請求項１又は２に記載の超速硬性セメント組成
物。3. The ultra-fast setting cement as a main component,
12CaO ・ 7Al TwoOThree, 11CaO ・ 7AlTwoOThree
・ CaXTwo(Where X represents a halogen element) 3Ca
O.3AlTwoOThree・ CaSOFour, And amorphous calcium
Including at least one selected from mulaminate
The fine aggregate is silica sand, and the chemical admixture is a water reducing agent.
The ultra-fast-setting cement composition according to claim 1 or 2,
Stuff.
Ｏ3 （モル比）が１．０〜１．３であることを特徴とす
る請求項１〜３のいずれか１項に記載の超速硬性セメン
ト組成物。4. The super-hardening cement of SO 3 / Al 2
O 3 (molar ratio) ultrarapid hardening cement composition according to any one of claims 1 to 3, characterized in that 1.0 to 1.3.
前記細骨材の含有量が５〜５０重量％であり、かつ前記
化学混和剤の含有量が０．１〜５重量％である、請求項
１〜４のいずれか１項に記載の超速硬性セメント組成
物。5. The ultra-fast setting cement composition according to claim 1,
The ultra-fast-curing material according to any one of claims 1 to 4, wherein the content of the fine aggregate is 5 to 50% by weight, and the content of the chemical admixture is 0.1 to 5% by weight. Cement composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30181097A JPH11139859A (en) | 1997-11-04 | 1997-11-04 | Very quick-hardening cement composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30181097A JPH11139859A (en) | 1997-11-04 | 1997-11-04 | Very quick-hardening cement composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11139859A true JPH11139859A (en) | 1999-05-25 |
Family
ID=17901443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30181097A Pending JPH11139859A (en) | 1997-11-04 | 1997-11-04 | Very quick-hardening cement composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11139859A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002137954A (en) * | 2000-10-26 | 2002-05-14 | Taiheiyo Material Kk | Hydraulic composition and paste, mortar and concrete using it |
| KR100362089B1 (en) * | 1999-12-01 | 2002-11-23 | 한일시멘트 (주) | The method for manufacturing of composition of joint mortar |
| JP2006096627A (en) * | 2004-09-30 | 2006-04-13 | Sumitomo Osaka Cement Co Ltd | Injection material for open-graded mixture, and method of constructing semi-flexible structure using the injection material |
| EP1373157A4 (en) * | 2001-03-02 | 2006-10-11 | James Hardie Int Finance Bv | Additive for dewaterable slurry |
| US7419544B2 (en) * | 2001-03-02 | 2008-09-02 | James Hardie International Finance B.V. | Additive for dewaterable slurry and slurry incorporating same |
| WO2013077216A1 (en) | 2011-11-21 | 2013-05-30 | 電気化学工業株式会社 | Ultra rapid hardening clinker, cement composition using same, and method for producing same |
| US8993462B2 (en) | 2006-04-12 | 2015-03-31 | James Hardie Technology Limited | Surface sealed reinforced building element |
| JP2016060673A (en) * | 2014-09-19 | 2016-04-25 | 株式会社Ihi | Processing method of fly ash |
| WO2018143387A1 (en) * | 2017-02-02 | 2018-08-09 | 住友大阪セメント株式会社 | Concrete composition and method for manufacturing concrete composition |
| AU2017396649B2 (en) * | 2017-02-02 | 2019-06-06 | Sumitomo Osaka Cement Co., Ltd. | Concrete composition and method for manufacturing concrete composition |
| CN112110672A (en) * | 2020-09-15 | 2020-12-22 | 武汉比邻科技发展有限公司 | Super early strength admixture, preparation method thereof and low-temperature sleeve grouting material for steel bar connection |
-
1997
- 1997-11-04 JP JP30181097A patent/JPH11139859A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100362089B1 (en) * | 1999-12-01 | 2002-11-23 | 한일시멘트 (주) | The method for manufacturing of composition of joint mortar |
| JP2002137954A (en) * | 2000-10-26 | 2002-05-14 | Taiheiyo Material Kk | Hydraulic composition and paste, mortar and concrete using it |
| JP4647767B2 (en) * | 2000-10-26 | 2011-03-09 | 太平洋マテリアル株式会社 | Hydraulic composition and its paste, mortar, concrete |
| EP1373157A4 (en) * | 2001-03-02 | 2006-10-11 | James Hardie Int Finance Bv | Additive for dewaterable slurry |
| US7419544B2 (en) * | 2001-03-02 | 2008-09-02 | James Hardie International Finance B.V. | Additive for dewaterable slurry and slurry incorporating same |
| JP2006096627A (en) * | 2004-09-30 | 2006-04-13 | Sumitomo Osaka Cement Co Ltd | Injection material for open-graded mixture, and method of constructing semi-flexible structure using the injection material |
| US8993462B2 (en) | 2006-04-12 | 2015-03-31 | James Hardie Technology Limited | Surface sealed reinforced building element |
| WO2013077216A1 (en) | 2011-11-21 | 2013-05-30 | 電気化学工業株式会社 | Ultra rapid hardening clinker, cement composition using same, and method for producing same |
| JP2016060673A (en) * | 2014-09-19 | 2016-04-25 | 株式会社Ihi | Processing method of fly ash |
| WO2018143387A1 (en) * | 2017-02-02 | 2018-08-09 | 住友大阪セメント株式会社 | Concrete composition and method for manufacturing concrete composition |
| AU2017396649B2 (en) * | 2017-02-02 | 2019-06-06 | Sumitomo Osaka Cement Co., Ltd. | Concrete composition and method for manufacturing concrete composition |
| CN112110672A (en) * | 2020-09-15 | 2020-12-22 | 武汉比邻科技发展有限公司 | Super early strength admixture, preparation method thereof and low-temperature sleeve grouting material for steel bar connection |
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