JPH05330875A - Cement admixture and cement composition - Google Patents
Cement admixture and cement compositionInfo
- Publication number
- JPH05330875A JPH05330875A JP15888392A JP15888392A JPH05330875A JP H05330875 A JPH05330875 A JP H05330875A JP 15888392 A JP15888392 A JP 15888392A JP 15888392 A JP15888392 A JP 15888392A JP H05330875 A JPH05330875 A JP H05330875A
- Authority
- JP
- Japan
- Prior art keywords
- cement
- weight
- parts
- admixture
- strength
- 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.)
- Granted
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
- C04B28/04—Portland cements
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、セメント混和材、特に
早期強度や長期強度が要求される分野に使用されるセメ
ント混和材及びセメント組成物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cement admixture, and more particularly to a cement admixture and a cement composition used in the fields where early strength and long-term strength are required.
【０００２】[0002]
【従来の技術とその課題】従来より、カルシウムアルミ
ネート、セッコウ類、及び凝結調整剤等をポルトランド
セメントに混合して急硬性セメントとすることが知られ
ている。この急硬性セメントを用いたモルタルやコンク
リートは、急硬性を示すために、打設から数時間後には
使用可能となる(特開昭47-99124号公報)。しかしなが
ら、従来の急硬性セメントは、用途によって、初期の強
度発現性が必ずしも十分とはいえなかった。2. Description of the Related Art It has been conventionally known to mix calcium aluminate, gypsum, a coagulation modifier and the like with Portland cement to prepare a rapid hardening cement. Mortar and concrete using this rapid-hardening cement can be used within a few hours after placing because it shows rapid-hardening property (JP-A-47-99124). However, the conventional rapid hardening cement was not always sufficient in the initial strength development depending on the application.
【０００３】本発明者は、前記課題を解消すべく、種々
検討を重ねた結果、特定の組成のセメント混和材が本発
明の課題を解決するとの知見を得て本発明を完成するに
至った。As a result of various studies to solve the above problems, the present inventor has found that a cement admixture having a specific composition solves the problems of the present invention, and has completed the present invention. ..
【０００４】[0004]
【課題を解決するための手段】即ち、本発明は、アルミ
ニウム以外の３価金属の酸化物を含有するアルミノケイ
酸カルシウムガラスと、セッコウ類とを主成分とするセ
メント混和材であり、セメントと該セメント混和材を主
成分とするセメント組成物である。That is, the present invention is a cement admixture mainly composed of calcium aluminosilicate glass containing an oxide of a trivalent metal other than aluminum, and gypsum, which comprises the cement and the cement. A cement composition containing a cement admixture as a main component.
【０００５】以下本発明を詳しく説明する。The present invention will be described in detail below.
【０００６】本発明に係るアルミノケイ酸カルシウムガ
ラス(以下CASガラスという)とは、アルミニウム以外の
３価金属の酸化物を含有するもので、その組成領域とし
て、CaO30〜60重量％、Al2O320〜60重量％、及びSiO2５
〜25重量％が好ましく、CaO30〜55重量％、Al2O330〜60
重量％、及びSiO210〜20重量％がより好ましい。CaOが3
0重量％未満あるいはAl2O3が60重量％を超えると、急硬
性に劣る傾向があり、逆に、CaOが60重量％を超えるか
あるいはAl2O3が20重量％未満であると、凝結調整剤を
多量添加しても瞬結してしまい、作業性の面から好まし
くない。また、SiO2が５重量％未満であると、長期的な
強度の伸びが期待できず、逆に25重量％を超えると初期
強度が小さい傾向がある。The calcium aluminosilicate glass (hereinafter referred to as CAS glass) according to the present invention contains an oxide of a trivalent metal other than aluminum, and its composition range is CaO 30 to 60% by weight and Al 2 O 3 20-60% by weight, and SiO 2 5
~ 25 wt% is preferred, CaO 30-55 wt%, Al 2 O 3 30-60
Wt%, and SiO 2 10 to 20 wt% is more preferable. CaO is 3
If it is less than 0% by weight or Al 2 O 3 exceeds 60% by weight, rapid hardening tends to be poor. Conversely, if CaO exceeds 60% by weight or Al 2 O 3 is less than 20% by weight, Even if a large amount of the coagulation regulator is added, the composition will momentarily set, which is not preferable in terms of workability. If SiO 2 is less than 5% by weight, long-term strength elongation cannot be expected, and conversely, if it exceeds 25% by weight, the initial strength tends to be small.
【０００７】ここで、アルミニウム以外の３価金属の酸
化物とは、金属をＭとすると、通常M2O3と記載されるも
ので、Ｍがアルミニウム以外の３価金属であって、具体
的には、B2O3、Cr2O3、Fe2O3、Co2O3、Pb2O3、及びBi2O
3等が挙げられる。Here, the oxide of a trivalent metal other than aluminum is usually described as M 2 O 3 where M is a metal, and M is a trivalent metal other than aluminum. Include B 2 O 3 , Cr 2 O 3 , Fe 2 O 3 , Co 2 O 3 , Pb 2 O 3 , and Bi 2 O.
3 etc.
【０００８】本発明のCASガラスとは、これらのうち、
一種叉は二種以上を含有するものである。The CAS glass of the present invention means, among these,
One kind or two or more kinds are contained.
【０００９】本発明のCASガラス100重量部中のM2O3の含
有量は、１〜20重量部が好ましく、３〜15重量部がより
好ましく、５〜10重量部が最も好ましい。M2O3の含有量
が１重量部未満では長期強度が得られにくく、20重量部
を越えると、初期強度が得られにくい。The content of M 2 O 3 in 100 parts by weight of the CAS glass of the present invention is preferably 1 to 20 parts by weight, more preferably 3 to 15 parts by weight, and most preferably 5 to 10 parts by weight. When the content of M 2 O 3 is less than 1 part by weight, it is difficult to obtain long-term strength, and when it exceeds 20 parts by weight, it is difficult to obtain initial strength.
【００１０】なお、後述の一般の工業原料には、MgO、T
iO2、K2O、及びNa2O等の不純物が当然含まれている。こ
れらの不純物は、CaO-Al2O3-SiO2系のガラス化領域を拡
張することから、10重量％未満までの存在は好ましく、
また、急硬性、作業性、及び長期強度の伸び等の諸特性
に問題は生じない。In addition, general industrial raw materials described later include MgO and T
Impurities such as iO 2 , K 2 O, and Na 2 O are naturally contained. Since these impurities expand the vitrification region of the CaO-Al 2 O 3 -SiO 2 system, the presence of less than 10% by weight is preferable,
Further, there are no problems in various properties such as rapid hardening property, workability, and elongation of long-term strength.
【００１１】本発明におけるガラスとは、熱分析から求
められる、「ガラス転移点を示すもの」をいう。The glass in the present invention means "one showing a glass transition point" which is determined by thermal analysis.
【００１２】なお、全てがガラス質である必要はなく、
ガラス化率が50％以上であることが好ましく、70％以上
がより好ましく、80％以上が最も好ましい。50％未満で
は、初期強度が小さくなる傾向がある。Incidentally, it is not necessary that all of them are glassy,
The vitrification rate is preferably 50% or more, more preferably 70% or more, most preferably 80% or more. If it is less than 50%, the initial strength tends to be small.
【００１３】ガラス化率(Ｘ)は、例えば、本発明におい
ては、CASガラスを、1,000℃で２時間加熱して溶融し、
その後、５℃／分の冷却速度で徐冷し、粉末Ｘ線回折法
により求めた結晶鉱物のメインピークの面積S0とCASガ
ラス中の結晶のメインピークの面積Ｓから数１に従って
算出した。The vitrification ratio (X) is, for example, in the present invention, CAS glass is melted by heating at 1,000 ° C. for 2 hours,
Then, the sample was gradually cooled at a cooling rate of 5 ° C./min, and calculated from the main peak area S 0 of the crystal mineral and the main peak area S of the crystal in the CAS glass obtained by the powder X-ray diffraction method according to Formula 1.
【００１４】[0014]
【数１】 [Equation 1]
【００１５】また、CASガラス製造の際に、一般的なガ
ラスの融剤であるNaNO3やKNO3などの硝酸アルカリ、フ
ッ化カルシウム、及びホウ砂等を加えることは、ガラス
の融点を下げることから好ましい。In addition, in the production of CAS glass, adding alkali nitrates such as NaNO 3 and KNO 3 which are general glass fluxing agents, calcium fluoride, and borax lowers the melting point of glass. Is preferred.
【００１６】本発明のCASガラス製造用原料としては、C
aO質原料、Al2O3質原料、SiO2質原料、及びM2O3質原料
が挙げられる。The raw material for producing the CAS glass of the present invention is C
Examples thereof include aO raw material, Al 2 O 3 raw material, SiO 2 raw material, and M 2 O 3 raw material.
【００１７】CaO質原料としては、生石灰、消石灰、及
び石灰石等が、また、Al2O3質原料としては、アルミ
ナ、ボーキサイト、ダイアスポア、長石、及び粘土等
が、さらに、SiO2質原料としては、ケイ砂、白土、及び
ケイ藻土等が使用可能である。また、M2O3質原料として
は、M2O3そのもの叉はアルミニウム以外の３価金属の炭
酸塩や硫酸塩など、熱処理によってM2O3となるものであ
れば使用可能である。CaO-based raw materials include quicklime, slaked lime, limestone, etc., Al 2 O 3 -based raw materials include alumina, bauxite, diaspore, feldspar, clay, etc., and SiO 2 -based raw materials. , Silica sand, clay and diatomaceous earth can be used. As the M 2 O 3 raw material, M 2 O 3 itself or a carbonate or sulfate of a trivalent metal other than aluminum can be used as long as it becomes M 2 O 3 by heat treatment.
【００１８】本発明のCASガラスは、このCaO質原料、Al
2O3質原料、SiO2質原料、及びM2O3質原料を所定の割合
で配合し、直接通電式溶融炉や高周波炉などを用いて溶
融し、得られた溶融体を圧縮空気や高圧水により吹飛ば
す方法、あるいは、水中に流し込む方法などにより製造
される。さらには、ロータリーキルンで溶融し、急冷す
ることによっても製造することも可能である。The CAS glass of the present invention comprises the CaO raw material, Al
2 O 3 -based raw material, SiO 2 -based raw material, and M 2 O 3 -based raw material are mixed at a predetermined ratio and melted using a direct current type melting furnace or a high frequency furnace, and the resulting melt is compressed with air or compressed air. It is manufactured by a method of blowing off with high-pressure water or a method of pouring into water. Further, it can be produced by melting in a rotary kiln and quenching.
【００１９】本発明のCASガラスの粉末度は細かければ
細かいほど反応性が向上するので好ましく、特に、ブレ
ーン比表面積で3,000cm2/g以上が好ましい。The finer the fineness of the CAS glass of the present invention, the better the reactivity, and it is particularly preferable that the Blaine specific surface area is 3,000 cm 2 / g or more.
【００２０】本発明に係るセッコウ類とは、二水、半
水、II型無水、及びIII型無水セッコウであり、天然産
のものや、リン酸セッコウ、排脱セッコウ、及びフッ酸
セッコウ等の化学セッコウ叉はこれらを熱処理して得ら
れたものが使用可能であり、通常含まれる不純物の種類
や量には影響されないものである。このうち、初期の強
度発現性、作業性の面から、II型無水セッコウが特に優
れており、通常、未反応物を残さないため、ブレーン比
表面積で3,000cm2/g以上に粉砕したものの使用が好まし
い。Gypsums according to the present invention are dihydrate, semi-water, type II anhydrous, and type III anhydrous gypsum, such as naturally-occurring gypsum, phosphate gypsum, drainage gypsum, and hydrofluoric acid gypsum. The chemical gypsum or the one obtained by heat-treating these can be used, and is not affected by the type and amount of impurities normally contained. Of these, type II anhydrous gypsum is particularly excellent in terms of initial strength development and workability, and usually does not leave any unreacted material, so use one pulverized to a grain surface area of 3,000 cm 2 / g or more with a Blaine specific surface area. Is preferred.
【００２１】セッコウ類の使用量は、M2O3を含有するCA
Sガラス100重量部に対して、300重量部以下が好まし
く、20〜200重量部がより好ましく、50〜150重量部が最
も好ましい。300重量部を越えると、未反応のセッコウ
類の反応による膨張のために長期的に強度の低下が起こ
る恐れがある。The amount of gypsum used is CA containing M 2 O 3.
With respect to 100 parts by weight of S glass, 300 parts by weight or less is preferable, 20 to 200 parts by weight is more preferable, and 50 to 150 parts by weight is most preferable. If it exceeds 300 parts by weight, strength may decrease for a long time due to expansion of unreacted gypsum due to reaction.
【００２２】本発明のセメント混和材は、M2O3を含有す
るCASガラスとセッコウ類からなる急硬成分を主成分と
するもので、セメントと混和し使用するものである。The cement admixture of the present invention is mainly composed of a CAS glass containing M 2 O 3 and a rapid hardening component composed of gypsum, and is used by mixing with cement.
【００２３】ここで、セメントとしては、普通・早強・
超早強等の各種ポルトランドセメントや、それらに高炉
スラグ、フライアッシュ、又はシリカを混合した各種混
合セメント、さらには、中庸熱セメント、白色セメン
ト、並びに、コロイドセメント等の特殊セメント等が挙
げられる。Here, as cement, normal, early strength,
Examples include various portland cements such as super early strength, various mixed cements obtained by mixing them with blast furnace slag, fly ash, or silica, and moderate heat cements, white cements, and special cements such as colloidal cements.
【００２４】本発明におけるセメント混和材の使用量
は、セメントとセメント混和材の合計100重量部に対し
て、５〜50重量部が好ましい。５重量部未満では、初期
の強度発現性が低下する傾向があり、50重量部を越える
と添加量に比例した強度発現はせず不経済となる傾向が
ある。The amount of the cement admixture used in the present invention is preferably 5 to 50 parts by weight based on 100 parts by weight of the total amount of the cement and the cement admixture. If the amount is less than 5 parts by weight, the initial strength development tends to decrease, and if the amount exceeds 50 parts by weight, the strength development in proportion to the added amount does not occur and it tends to be uneconomical.
【００２５】本発明のセメント混和材を使用すると、短
時間で硬化する傾向があるため、作業性を調節する目的
で凝結調節剤を使用することは好ましい。When the cement admixture of the present invention is used, it tends to harden in a short period of time, so it is preferable to use a setting regulator for the purpose of controlling workability.
【００２６】凝結調整剤は、CASガラス中のCaO含有量が
多く凝結時間の早い場合や、CASガラス中のCaO含有量が
少なく凝結時間の遅い場合などに特に使用される。凝結
調整剤としては、塩化カルシウム、塩化第二鉄、及び塩
化アルミニウム等の塩化物、アルミン酸ナトリウムやア
ルミン酸カリウムなどのアルミン酸塩、炭酸ナトリウム
や炭酸カリウムなどの炭酸塩、硫酸ナトリウムや硫酸カ
リウムなどの硫酸塩、水酸化ナトリウムや水酸化カルシ
ウムなどの水酸化物、ケイフッ化亜鉛、ケイフッ化マグ
ネシウム、及びケイフッ化ナトリウム等のケイフッ化物
等の無機塩類、並びに、クエン酸、グルコン酸、及び酒
石酸又はこれらのカルシウム塩、ナトリウム塩、及びカ
リウム塩等の有機酸系化合物であり、このうち、一種又
は二種以上を使用することが可能である。特に、炭酸ア
ルカリと有機酸系化合物の併用は最も好ましい。The setting regulator is used especially when the CaO content in the CAS glass is high and the setting time is fast, or when the CaO content in the CAS glass is low and the setting time is slow. As the coagulation regulator, chlorides such as calcium chloride, ferric chloride and aluminum chloride, aluminates such as sodium aluminate and potassium aluminate, carbonates such as sodium carbonate and potassium carbonate, sodium sulfate and potassium sulfate. Such as sulfates, hydroxides such as sodium hydroxide or calcium hydroxide, inorganic salts such as zinc silicofluoride, magnesium silicofluoride, and silicofluorides such as sodium silicofluoride, and citric acid, gluconic acid, and tartaric acid or These are organic acid compounds such as calcium salt, sodium salt and potassium salt, and it is possible to use one or more of them. In particular, the combined use of alkali carbonate and organic acid compounds is most preferable.
【００２７】凝結調整剤の使用量は、M2O3を含有するCA
Sガラス100重量部に対して、0.1〜20重量部が好まし
い。0.1重量部未満であると作業性が悪く、20重量部を
越えると初期の強度発現性が好ましくない。The amount of the coagulation modifier used is CA containing M 2 O 3.
0.1 to 20 parts by weight is preferable with respect to 100 parts by weight of S glass. If it is less than 0.1 part by weight, workability is poor, and if it exceeds 20 parts by weight, initial strength development is not preferable.
【００２８】また、本発明においては、モルタルやコン
クリートに通常使用される他の混和材料を併用すること
も可能である。Further, in the present invention, it is also possible to use other admixture materials commonly used for mortar and concrete.
【００２９】ここで、他の混和材料としては、例えば、
けい砂、天然砂、及び砂利等の骨材、ガラス繊維、カー
ボン繊維、及び鋼繊維等の繊維、ポリマーエマルジョン
やラテックス、着色剤、AE剤、減水剤、AE減水剤、流動
化剤、防錆剤、メチルセルロースなどの保水剤、塩化カ
ルシウムやケイ酸ナトリウムなどの防水剤、発泡剤、起
泡剤、水酸化カルシウムなどのカルシウム塩、並びに、
防凍剤等が挙げられ、その中の一種又は二種以上を、本
発明の目的を実質的に阻害しない量で併用することが可
能である。Here, as other admixture materials, for example,
Aggregate such as silica sand, natural sand and gravel, fiber such as glass fiber, carbon fiber and steel fiber, polymer emulsion and latex, colorant, AE agent, water reducing agent, AE water reducing agent, superplasticizer, rust preventive Agents, water retention agents such as methylcellulose, waterproofing agents such as calcium chloride and sodium silicate, foaming agents, foaming agents, calcium salts such as calcium hydroxide, and
Antifreeze agents and the like can be mentioned, and one or more of them can be used in combination in an amount that does not substantially impair the object of the present invention.
【００３０】本発明において、各材料の混合方法は特に
制限されるものではなく、各々の材料を施工時に混合し
てもよいし、あらかじめ一部もしくは全部を混合してお
いても差支えない。In the present invention, the method of mixing the respective materials is not particularly limited, and the respective materials may be mixed at the time of construction, or part or all of them may be mixed in advance.
【００３１】また、本発明のセメントやセメント混和材
の混合装置は、特に制限されるものではなく、例えば、
傾胴ミキサー、千代田技研工業(株)製オムニミキサー、
Ｖ型ミキサー、ヘンシェルミキサー、及びナウターミキ
サー等の既存のいかなる撹拌装置も使用可能である。The cement or cement admixture mixing apparatus of the present invention is not particularly limited.
Tilting mixer, Omni mixer made by Chiyoda Giken Co., Ltd.,
Any existing agitator such as a V-type mixer, a Henschel mixer, and a Nauta mixer can be used.
【００３２】[0032]
【実施例】以下、実施例により、本発明を具体的に説明
するが、本発明はこれら実施例に限定されるものではな
い。EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples.
【００３３】実施例１ セメント100重量部に対して、表１に示すように、CASガ
ラス100重量部とセッコウ類100重量部からなるセメント
混和材25重量部、炭酸ナトリウム1.6重量部、クエン酸
ナトリウム0.16重量部を配合し、JIS R 5201の１：２モ
ルタルを作成し、凝結時間を測定した。このモルタルを
使用して、４×４×16cmの供試体を成形し、直ちに20
℃、60ＲＨで養生し、１日後、20℃の水中養生を行い、
所定材令の圧縮強度を測定した。結果を凝結時間ととも
に表１に併記する。Example 1 As shown in Table 1, 25 parts by weight of a cement admixture consisting of 100 parts by weight of CAS glass and 100 parts by weight of gypsum, 1.6 parts by weight of sodium carbonate, and sodium citrate per 100 parts by weight of cement. 0.16 parts by weight was blended to prepare JIS R 5201 1: 2 mortar, and the setting time was measured. Using this mortar, mold a 4x4x16 cm specimen and immediately
C., 60 RH, and after 1 day, 20 C in water,
The compressive strength of a predetermined material was measured. The results are also shown in Table 1 together with the setting time.
【００３４】＜使用材料＞ セメント：電気化学工業(株)製、普通ポルトランドセメ
ント CASガラスＡ：純度99.9％の市販特級試薬のCaCO3、Al2O
3、SiO2、Pb2O3、及びB2O3を使用。CaCO351.0重量部、A
l2O332.0重量部、SiO212.0重量部、及びPb2O35.0重量部
混合し、カーボンるつぼにいれ、1,600℃の高周波炉で
加熱溶融後、急冷したPb2O3を含有するCASガラスを粉
砕。ガラス化率95重量％、ブレーン値5,100cm2/g CASガラスＢ：CaCO346.0重量部、Al2O330.0重量部、SiO
214.0重量部、及びB2O310.0重量部を混合し、同様にし
て生成したB2O3を含有するCASガラスを粉砕。ガラス化
率100重量％、ブレーン値5,100cm2/g CASガラスＣ：CaCO346.0重量部、Al2O330.0重量部、及
びSiO214.0重量部を混合し、同様にして生成したM2O3を
含有しないCASガラス粉砕。ガラス化率100重量％、ブレ
ーン値5,100cm2/g セッコウ類：サンケイ石膏(株)製無水セッコウ、工業品 炭酸ナトリウム：和光純薬(株)製、試薬特級 クエン酸ナトリウム：和光純薬(株)製、試薬特級<Materials used> Cement: ordinary Portland cement CAS glass A manufactured by Denki Kagaku Kogyo Co., Ltd .: CaCO 3 and Al 2 O, commercially available special grade reagents with a purity of 99.9%
3 , using SiO 2 , Pb 2 O 3 , and B 2 O 3 . CaCO 3 51.0 parts by weight, A
l 2 O 3 32.0 parts by weight, SiO 2 12.0 parts by weight, and Pb 2 O 3 5.0 parts by weight, placed in a carbon crucible, was heated and molten at a high-frequency furnace of 1,600 ° C., containing Pb 2 O 3 was quenched CAS Shatter the glass. Vitrification rate 95% by weight, Blaine value 5,100 cm 2 / g CAS glass B: CaCO 3 46.0 parts by weight, Al 2 O 3 30.0 parts by weight, SiO
2 14.0 parts by weight and B 2 O 3 10.0 parts by weight are mixed, and CAS glass containing B 2 O 3 produced in the same manner is crushed. Vitrification rate of 100% by weight, Blaine value of 5,100 cm 2 / g CAS glass C: CaCO 3 46.0 parts by weight, Al 2 O 3 30.0 parts by weight, and SiO 2 14.0 parts by weight were mixed to form M 2 O in the same manner. CAS glass grinding not containing 3 . Vitrification rate 100% by weight, Blaine value 5,100 cm 2 / g Gypsum: Anhydrous gypsum manufactured by Sankei Gypsum Co., Ltd., industrial product Sodium carbonate: Wako Pure Chemical Industries, Ltd., reagent grade sodium citrate: Wako Pure Chemical Industries, Ltd. ), Special grade reagent
【００３５】凝結時間を伸ばすために、クエン酸ナトリ
ウムを0.5重量％加えたモルタル硬化体は、材令７日に
おいて、表面に多くの亀裂を生じた。The hardened mortar, to which 0.5% by weight of sodium citrate was added in order to extend the setting time, had many cracks on the surface after 7 days of age.
【００３６】実施例２ 純度99.9％の試薬特級のCaCO3、Al2O3、SiO2、及びB2O3
を表２に示す配合で混合し、実施例１と同様に生成した
B2O3を含有するCASガラスを、ブレーン値5,000±100cm2
/gになるまで粉砕した。ガラス化率を表２に併記する。
このように生成したB2O3を含有するCASガラスと実施例
１で使用したCASガラスＢ、II型無水セッコウ、炭酸カ
リウム、及びグルコン酸を表３に示すように配合し、混
合してセメント混和材とした。なお、CASガラスとII型
無水セッコウの合計100重量部に対して、炭酸カリウム
1.6重量部とグルコン酸0.16重量部を併用した。以上の
セメント混和材をセメントとセメント混和材の合計100
重量部に対して、20重量部配合し、実施例１と同様に行
った。結果を表３に併記する。Example 2 Reagent grade CaCO 3 , Al 2 O 3 , SiO 2 and B 2 O 3 having a purity of 99.9%
Were mixed in the formulation shown in Table 2 to produce in the same manner as in Example 1.
Blaine value 5,000 ± 100 cm 2 of CAS glass containing B 2 O 3
It was crushed until it reached / g. The vitrification rate is also shown in Table 2.
The CAS glass containing B 2 O 3 thus produced and the CAS glass B used in Example 1, type II anhydrous gypsum, potassium carbonate, and gluconic acid were blended as shown in Table 3, mixed and cemented. Made into an admixture. In addition, potassium carbonate was added to 100 parts by weight of CAS glass and type II anhydrous gypsum.
1.6 parts by weight and 0.16 parts by weight of gluconic acid were used together. The above cement admixture is 100 in total of cement and cement admixture.
20 parts by weight was added to the parts by weight, and the same procedure as in Example 1 was performed. The results are also shown in Table 3.
【００３７】＜使用材料＞ 炭酸カリウム：和光純薬(株)製、試薬１級 グルコン酸：和光純薬(株)製、試薬１級<Materials used> Potassium carbonate: Wako Pure Chemical Industries, Ltd., first-grade reagent Gluconic acid: Wako Pure Chemical Industries, Ltd., first-grade reagent
【００３８】[0038]
【表２】 [Table 2]
【００３９】[0039]
【表３】 [Table 3]
【００４０】実施例３ 実施例２で合成したCASガラスＦ100重量部に対して、II
型無水セッコウ100重量部、炭酸ナトリウム２重量部、
及びクエン酸0.2重量部配合し、セメント混和材とし
た。このセメント混和材を、セメントとセメント混和材
の合計100重量部に対して、５重量部と50重量部配合
し、実施例１と同様に行った。結果を表４に併記する。Example 3 For 100 parts by weight of the CAS glass F synthesized in Example 2, II
Type anhydrous gypsum 100 parts by weight, sodium carbonate 2 parts by weight,
And 0.2 part by weight of citric acid were mixed to obtain a cement admixture. 5 parts by weight and 50 parts by weight of this cement admixture was added to 100 parts by weight of cement and the total amount of cement admixture, and the same procedure as in Example 1 was performed. The results are also shown in Table 4.
【００４１】[0041]
【表４】[Table 4]
【００４２】[0042]
【発明の効果】本発明のセメント混和材を用いると、早
期強度が大きい、長期強度が大きい、ひびわれが生じに
くい。等の効果が期待でき、さらに、本発明のセメント
混和材は従来品と同様の使用方法で用いることが可能で
あり、短時間に必要な強度が要求されるような、例え
ば、プレハブ製品などの二次製品用から、道路、建築、
トンネル工事、あるいは道路補修、グラウト材、及び止
水材等に広く使用することが可能である。When the cement admixture of the present invention is used, early strength is high, long-term strength is high, and cracking is unlikely to occur. In addition, the cement admixture of the present invention can be used in the same method of use as conventional products, and required strength in a short time is required, such as prefabricated products. For secondary products, from roads, construction,
It can be widely used for tunnel construction, road repairs, grout materials, and waterproofing materials.
【表１】 [Table 1]
【表４】 [Table 4]
【表４】 [Table 4]
Claims (2)
含有するアルミノケイ酸カルシウムガラスと、セッコウ
類とを主成分とするセメント混和材。1. A cement admixture mainly composed of calcium aluminosilicate glass containing an oxide of a trivalent metal other than aluminum and gypsum.
材を主成分とするセメント組成物。2. A cement composition comprising cement and the cement admixture according to claim 1 as a main component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15888392A JP3199454B2 (en) | 1992-05-27 | 1992-05-27 | Cement admixture and cement composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15888392A JP3199454B2 (en) | 1992-05-27 | 1992-05-27 | Cement admixture and cement composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05330875A true JPH05330875A (en) | 1993-12-14 |
| JP3199454B2 JP3199454B2 (en) | 2001-08-20 |
Family
ID=15681472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15888392A Expired - Lifetime JP3199454B2 (en) | 1992-05-27 | 1992-05-27 | Cement admixture and cement composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3199454B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002234759A (en) * | 2001-02-07 | 2002-08-23 | Denki Kagaku Kogyo Kk | Cement admixture and cement composition |
| EP0812155B1 (en) * | 1995-02-02 | 2003-12-17 | Boston Scientific Corporation | Surgical wire basket extractor |
| JP2008138360A (en) * | 2006-11-29 | 2008-06-19 | Denki Kagaku Kogyo Kk | Element anchoring capsule constituted by containing quick-hardening component |
| US7717924B2 (en) | 1996-05-03 | 2010-05-18 | Boston Scientific Scimed, Inc. | Medical retrieval device |
| JP2018204190A (en) * | 2017-05-31 | 2018-12-27 | デンカ株式会社 | Road repair material |
| WO2019026674A1 (en) * | 2017-08-03 | 2019-02-07 | デンカ株式会社 | Cement admixture, cement composition and production method therefor |
| JP2020105043A (en) * | 2018-12-26 | 2020-07-09 | 鹿島道路株式会社 | Pavement repair material and repair method using the same |
-
1992
- 1992-05-27 JP JP15888392A patent/JP3199454B2/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0812155B1 (en) * | 1995-02-02 | 2003-12-17 | Boston Scientific Corporation | Surgical wire basket extractor |
| US7591825B2 (en) | 1995-02-02 | 2009-09-22 | Boston Scientific Corporation | Surgical extractor |
| US7918860B2 (en) | 1995-02-02 | 2011-04-05 | Boston Scientific Corporation | Surgical extractor |
| US8617178B2 (en) | 1995-02-02 | 2013-12-31 | Boston Scientific Scimed, Inc. | Surgical extractor |
| US7717924B2 (en) | 1996-05-03 | 2010-05-18 | Boston Scientific Scimed, Inc. | Medical retrieval device |
| JP2002234759A (en) * | 2001-02-07 | 2002-08-23 | Denki Kagaku Kogyo Kk | Cement admixture and cement composition |
| JP4685250B2 (en) * | 2001-02-07 | 2011-05-18 | 電気化学工業株式会社 | Cement admixture and cement composition |
| JP2008138360A (en) * | 2006-11-29 | 2008-06-19 | Denki Kagaku Kogyo Kk | Element anchoring capsule constituted by containing quick-hardening component |
| JP2018204190A (en) * | 2017-05-31 | 2018-12-27 | デンカ株式会社 | Road repair material |
| WO2019026674A1 (en) * | 2017-08-03 | 2019-02-07 | デンカ株式会社 | Cement admixture, cement composition and production method therefor |
| JPWO2019026674A1 (en) * | 2017-08-03 | 2020-06-18 | デンカ株式会社 | Cement admixture, cement composition and method for producing the same |
| JP2020105043A (en) * | 2018-12-26 | 2020-07-09 | 鹿島道路株式会社 | Pavement repair material and repair method using the same |
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|---|---|
| JP3199454B2 (en) | 2001-08-20 |
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