JP2556531B2 - Cement admixture - Google Patents
Cement admixtureInfo
- Publication number
- JP2556531B2 JP2556531B2 JP27574487A JP27574487A JP2556531B2 JP 2556531 B2 JP2556531 B2 JP 2556531B2 JP 27574487 A JP27574487 A JP 27574487A JP 27574487 A JP27574487 A JP 27574487A JP 2556531 B2 JP2556531 B2 JP 2556531B2
- Authority
- JP
- Japan
- Prior art keywords
- cement
- weight
- parts
- sulfate
- admixture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000004568 cement Substances 0.000 title claims description 24
- 239000002518 antifoaming agent Substances 0.000 claims description 8
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 7
- 229910052936 alkali metal sulfate Inorganic materials 0.000 claims description 5
- 239000004570 mortar (masonry) Substances 0.000 description 11
- 239000004567 concrete Substances 0.000 description 10
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000011398 Portland cement Substances 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- WURBVZBTWMNKQT-UHFFFAOYSA-N 1-(4-chlorophenoxy)-3,3-dimethyl-1-(1,2,4-triazol-1-yl)butan-2-one Chemical compound C1=NC=NN1C(C(=O)C(C)(C)C)OC1=CC=C(Cl)C=C1 WURBVZBTWMNKQT-UHFFFAOYSA-N 0.000 description 1
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 description 1
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 235000015165 citric acid Nutrition 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 fatty acid ester Chemical class 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000000174 gluconic acid Substances 0.000 description 1
- 235000012208 gluconic acid Nutrition 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- KVBGVZZKJNLNJU-UHFFFAOYSA-M naphthalene-2-sulfonate Chemical compound C1=CC=CC2=CC(S(=O)(=O)[O-])=CC=C21 KVBGVZZKJNLNJU-UHFFFAOYSA-M 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000006072 paste Substances 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ 本発明は、セメント混和材、特に硫酸アルミニウムと
アルカリ金属硫酸塩及び消泡剤からなる、高い早期強度
を発現するセメント混和材に関する。TECHNICAL FIELD The present invention relates to a cement admixture, particularly a cement admixture comprising aluminum sulfate, an alkali metal sulfate and a defoaming agent, which exhibits high early strength.
＜従来の技術とその問題点＞ 従来、早期強度の高いセメント硬化体を製造する方法
としては、セメント硫酸アルミニウム及びシリカ系化合
物粒子等からなる混和剤を配合し前養生を必要とせず、
直ちに昇温し、高温養生する方法が提案された（特開昭
62−52158号公報）。<Conventional Technology and Its Problems> Conventionally, as a method for producing a cement hardened product having high early strength, an admixture composed of cement aluminum sulfate and silica-based compound particles or the like is blended, and precuring is not required.
A method has been proposed in which the temperature is raised immediately and the material is cured at a high temperature (Japanese Patent Application Laid-Open No. Sho.
62-52158).
しかしながらこの方法はコンクリートの凝結が早い、
作業性が悪い等実用上問題が大きく、又養生後の脱型強
度の面でも充分なものではなく、熱によりクラツク及び
フクレ等の発生があり、外観上優れたものではなかつ
た。However, this method causes the concrete to set quickly,
The workability is not good, and the demolding strength after curing is not sufficient, and cracks and blisters are generated by heat, so that the appearance is not excellent.
本発明者らは、上記問題点を解消すべく種々検討した
結果、硫酸アルミニウムとアルカリ金属硫酸塩と消泡剤
とを主成分とするセメント混和材を用いることにより、
一定の作業性を有し、短時間の高温養生により数時間で
型枠脱型に必要な強度を発現せしめ、クラツクやフクレ
等のない外観の優れたセメント硬化体が出来る知見を得
て、本発明を完成するに至つた。The present inventors have conducted various studies to solve the above problems, by using a cement admixture containing aluminum sulfate, an alkali metal sulfate and an antifoaming agent as main components,
With a certain workability, the strength required for mold release from the mold was developed in a few hours by high temperature curing for a short time, and we obtained the knowledge that a cement hardened product with an excellent appearance without cracks and blisters can be obtained, The invention was completed.
＜問題点を解決するための手段＞ 即ち、本発明は硫酸アルミニウム、アルカリ金属硫酸
塩及び消泡剤からなるセメント混和材である。<Means for Solving Problems> That is, the present invention is a cement admixture comprising aluminum sulfate, an alkali metal sulfate and an antifoaming agent.
以下本発明を詳細に説明する。 The present invention will be described in detail below.
本発明に係るセメントとしては、普通・早強・超早強
等の各種ポルトランドセメントや、高炉スラグやフライ
アツシユ等を混合した各種混合セメント等いずれのセメ
ントの使用も可能である。As the cement according to the present invention, it is possible to use various types of cement such as various types of normal / early strength / ultra-early strength etc. portland cement and various mixed cements mixed with blast furnace slag, fly ash, etc.
硫酸アルミニウム（以下硫酸Alという）としては無水
物あるいは水和物、例えば、Al2（SO4）３・12〜18H
2O、のいずれのものでも使用でき、粉末あるいは水溶液
として使用できる。粉末状のときは、特に微粉、例え
ば、100メツシユ以下のほうが好ましい。Anhydrous or hydrate as aluminum sulfate (hereinafter referred to as sulfate Al), for example, Al 2 (SO 4) 3 · 12~18H
Any of 2 O can be used, and it can be used as a powder or an aqueous solution. When it is in the form of powder, fine powder, for example, 100 mesh or less is preferable.
アルカリ金属硫酸塩（以下硫酸アルカリという）は硫
酸ナトリウム（以下硫酸Naという）及び／又は硫酸カリ
ウム（以下硫酸Ｋという）で通常のものが使用できる
が、作業性及び強度発現の面から硫酸Naが好ましい。硫
酸アルカリの使用量は、硫酸Al100重量部に対し、硫酸
アルカリ50〜300重量部、好ましくは70〜200重量部、特
に好ましくは80〜150重量部である。50重量部未満であ
ると、セメント混練物の凝結速度が早く、作業性が取れ
ないばかりか、強度増進効果が少ない。300重量部を越
えると、短期強度発現が悪くなる。As the alkali metal sulfate (hereinafter referred to as “alkali sulfate”), sodium sulfate (hereinafter referred to as “sulfate Na”) and / or potassium sulfate (hereinafter referred to as “sulfate K”) can be commonly used, but sodium sulfate is used in terms of workability and strength development. preferable. The amount of alkali sulfate used is 50 to 300 parts by weight, preferably 70 to 200 parts by weight, and particularly preferably 80 to 150 parts by weight, based on 100 parts by weight of aluminum sulfate. If the amount is less than 50 parts by weight, not only the setting speed of the cement kneaded product is high, workability cannot be obtained, but also the strength increasing effect is small. When it exceeds 300 parts by weight, the short-term strength development deteriorates.
消泡剤としてはシリコーン系、ノニオン系、アルコー
ル系、脂肪酸、エーテル、脂肪酸エステル、リン酸エス
テルや、ポリエーテル系、フツ素系などがあげられる。Examples of the defoaming agent include silicone type, nonionic type, alcohol type, fatty acid, ether, fatty acid ester, phosphoric acid ester, polyether type and fluorine type.
具体的には、シリコーン系はオイル型及びそのオイル
型をトルエン等の溶剤で溶かした溶液型、又、シリコー
ンオイルに無機質の微粉末を添加したコンパウンド型、
更には各種の乳化剤を用いたエマルジヨン型等が挙げら
れる。消泡剤としては消泡効果及びモルタル硬化体表面
性状の面から、シリコーン系及びノニオン系が好まし
い。Specifically, the silicone type is an oil type and a solution type in which the oil type is dissolved in a solvent such as toluene, or a compound type in which an inorganic fine powder is added to silicone oil,
Furthermore, emulsion type using various emulsifiers and the like can be mentioned. As the defoaming agent, silicone type and nonionic type are preferable from the viewpoints of defoaming effect and surface properties of cured mortar.
消泡剤はセメント混練物の凝結前の高温養生を可能と
し、高温養生後のコンクリート表面のクラツクを防止
し、更には強度増進及びセメント硬化体の表面性状を向
上させるため必要なものである。その消泡剤の使用量
は、硫酸Alと硫酸アルカリの混合物100重量部に対し、
0.1〜３重量部が好ましく、0.3〜２重量部が更に好まし
い。0.1重量部未満であると、上記効果がなくなり、３
重量部を越えても効果は変らず経済的でない。The defoaming agent is necessary in order to enable high-temperature curing before hardening of the cement kneaded mixture, prevent cracking of the concrete surface after high-temperature curing, and further increase strength and improve surface properties of the hardened cement. The amount of the defoaming agent used is 100 parts by weight of a mixture of Al sulfate and alkali sulfate,
0.1 to 3 parts by weight is preferable, and 0.3 to 2 parts by weight is more preferable. If the amount is less than 0.1 part by weight, the above effect is lost and 3
Even if it exceeds the weight part, the effect does not change and it is not economical.
混和材の使用量は、セメント100重量部に対し、混和
材２〜10重量部が好ましく、３〜７重量部が更に好まし
い。２重量部未満であると、高温養生後のコンクリート
表面にクラツクの発生する恐れが生じ、強度発現が悪
く、10重量部を越えても強度増進の効果は少なく経済的
でない。The amount of admixture used is preferably 2 to 10 parts by weight, more preferably 3 to 7 parts by weight, based on 100 parts by weight of cement. If the amount is less than 2 parts by weight, cracks may occur on the concrete surface after high temperature curing, resulting in poor strength development. Even if it exceeds 10 parts by weight, the effect of increasing the strength is small and it is not economical.
混和材の混合方法は、１）あらかじめセメントと混合
する。２）モルタルやコンクリートの混練時に混合す
る。３）モルタルやコンクリート混練り後任意の時間、
例えば、１時間以内に添加する。４）水溶液にし混合す
る等いずれの方法でも実施可能である。尚、混和材は各
材料を同時に混合してもよく、別々に混合してもよい。The mixing method of the admixture is as follows: 1) Mix with the cement in advance. 2) Mix when mixing mortar and concrete. 3) Any time after kneading mortar or concrete,
For example, it is added within 1 hour. 4) It can be carried out by any method such as making an aqueous solution and mixing. The admixture may be a mixture of each material at the same time or may be mixed separately.
更に必要に応じ、一般市販のセメント減水剤、例え
ば、β−ナフタレンスルホン酸塩ホルマリン縮合物、メ
ラミンスルホン酸塩等使用することによりそれ相当の効
果がある。Further, if necessary, a commercially available cement water reducing agent, for example, β-naphthalene sulfonate formalin condensate, melamine sulfonate or the like is used to obtain a corresponding effect.
本発明の混和材を用いる場合、凝結調節剤としてホウ
酸、リン酸及びケイ弗化物あるいはその塩などの無機化
合物、又はクエン酸、酒石酸及びグルコン酸などのオキ
シカルボン酸あるいはその塩などを使用することができ
る。When the admixture of the present invention is used, an inorganic compound such as boric acid, phosphoric acid and silicofluoride or a salt thereof, or an oxycarboxylic acid such as citric acid, tartaric acid and gluconic acid or a salt thereof is used as a setting regulator. be able to.
更にシリカフラワー、フライアツシユ及び微粉高炉ス
ラグ等を使用することによりセメント硬化体の外観面の
状態を改良できる。Furthermore, the appearance condition of the hardened cement product can be improved by using silica flour, fly ash, fine powder blast furnace slag and the like.
セメントペースト、モルタル及びコンクリート（以下
コンクリート類という）の成形方法としては、型枠に打
設するか又は遠心成形などいずれでもよい。As a method for forming cement paste, mortar and concrete (hereinafter referred to as concretes), either casting into a form or centrifugal molding may be used.
こうして成形されたコンクリート類は、常温で直ち
に、好ましくは20分以上の前養生を行なつた後、昇温を
行なう。昇温速度は型枠の転用回数を考慮し、20〜80℃
／時間、好ましくは30〜60℃／時間が良く、昇温速度が
この範囲より早いとコンクリート表面に熱応力クラツク
が発生しやすい。養生の保持温度は（ピーク温度）50℃
以上、好ましくは60〜90℃であり、ピーク温度の養生時
間は30〜90分間保持すればよい。The concrete thus molded is immediately preheated at room temperature, preferably for 20 minutes or more, and then heated. The temperature rising rate is 20 to 80 ° C, taking into account the number of times the mold has been used.
/ Hour, preferably 30 to 60 ° C./hour, and if the heating rate is faster than this range, thermal stress cracks are likely to occur on the concrete surface. Curing temperature is (peak temperature) 50 ℃
As described above, the temperature is preferably 60 to 90 ° C., and the curing time at the peak temperature may be maintained for 30 to 90 minutes.
加熱手段としては電気、温風、赤外線及び蒸気等のい
ずれも使用できるが蒸気養生が強度発現の点から好まし
い。As the heating means, any of electricity, warm air, infrared rays and steam can be used, but steam curing is preferred from the viewpoint of strength development.
セメント硬化体は上記の高温養生後、直ちに脱型さ
れ、全ての工程が終了する。The hardened cement is demolded immediately after the above high temperature curing, and all the steps are completed.
このようにして短時間で得られたセメント硬化体は普
通ポルトランドセメントのみを使用したセメント硬化体
に比べ、外観が優れ、耐久性においてもなんら変ること
がない。The hardened cement thus obtained in a short time has an excellent appearance and does not change in durability as compared with the hardened cement using only ordinary Portland cement.
＜実施例＞ 次に実施例をあげて更に本発明を説明する。<Examples> Next, the present invention will be further described with reference to Examples.
実施例１ 普通ポルトランドセメント100重量部（電気化学社
製）、細骨材（姫川産砂、FM＝2.7）200重量部、セメン
ト減水剤（花王社製商品名「マイテイ100」）0.5重量
部、水43重量部、表−１に示す混和材５重量部からなる
モルタルをJIS R 5201に準じて混練し、モルタル供試体
（４×４×16cm）を作り、20分後蒸気養生を開始した。
昇温速度は40℃／時間で80℃になつた時点で30分間保持
し、その後すぐに脱型した。コンクリートの外観状態を
観察し３時間、１日、28日の圧縮強度を測定した。更に
実験No.6と８のモルタルを20℃−80RH室で養生したもの
についても同様の試験を行つた。結果を表−２に示す。Example 1 100 parts by weight of ordinary Portland cement (manufactured by Denki Kagaku Co., Ltd.), 200 parts by weight of fine aggregate (sand produced by Himekawa, FM = 2.7), 0.5 parts by weight of cement water reducing agent (trade name "Mighty 100" manufactured by Kao Corporation), Mortar consisting of 43 parts by weight of water and 5 parts by weight of the admixture shown in Table 1 was kneaded according to JIS R 5201 to prepare a mortar specimen (4 × 4 × 16 cm), and after 20 minutes, steam curing was started.
The temperature rising rate was 40 ° C./hour, and when the temperature reached 80 ° C., the temperature was maintained for 30 minutes, and then the mold was removed immediately. The appearance of the concrete was observed and the compressive strength was measured for 3 hours, 1 day, and 28 days. Further, the same test was conducted on the mortars of Experiment Nos. 6 and 8 which were aged in a 20 ° C.-80 RH chamber. Table 2 shows the results.
実験No.16及び17は各々、実験No.6及び８のモルタル
使用 実験No.18は混和材無し H.T:ハンドリングタイム 実施例２ 実験No.7の配合の混和材の量を変えたこと以外は実施
例１と同様に行つた。結果を表−３に示す。 Experiments Nos. 16 and 17 used mortars of Experiments Nos. 6 and 8, respectively. Experiment No. 18 had no admixture. HT: Handling time Example 2 Except that the amount of admixture of the composition of Experiment No. 7 was changed. The same procedure as in Example 1 was performed. The results are shown in Table-3.
表から本発明品は凝結前に蒸気養生を行なつてもモル
タル等のクラツクは発生しなく短長期の強度発現は良好
である。 From the table, it can be seen that the product of the present invention does not generate cracks such as mortar even when steam curing is carried out before setting, and the strength development in the short term is good.
＜発明の効果＞ モルタル凝結前に急速蒸気養生を行なつても、熱によ
りクラツク及びフクレ等の発生は無く、短長期強度の発
現が良いばかりかモルタル硬化体表面につや等が有り外
観上優れている。<Effects of the Invention> Even if rapid steam curing is performed before mortar setting, cracks and blisters do not occur due to heat, not only good short-term long-term strength is exhibited, but also the surface of the mortar cured product is glossy and excellent in appearance. ing.
Claims (1)
び消泡剤からなるセメント混和材。1. A cement admixture comprising aluminum sulfate, an alkali metal sulfate and an antifoaming agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27574487A JP2556531B2 (en) | 1987-11-02 | 1987-11-02 | Cement admixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27574487A JP2556531B2 (en) | 1987-11-02 | 1987-11-02 | Cement admixture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01119551A JPH01119551A (en) | 1989-05-11 |
| JP2556531B2 true JP2556531B2 (en) | 1996-11-20 |
Family
ID=17559791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27574487A Expired - Fee Related JP2556531B2 (en) | 1987-11-02 | 1987-11-02 | Cement admixture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2556531B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5088126B2 (en) | 2007-12-25 | 2012-12-05 | トヨタ紡織株式会社 | Cover removable seat |
-
1987
- 1987-11-02 JP JP27574487A patent/JP2556531B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01119551A (en) | 1989-05-11 |
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