JPH02248354A - Production of hardened cement body - Google Patents
Production of hardened cement bodyInfo
- Publication number
- JPH02248354A JPH02248354A JP6934489A JP6934489A JPH02248354A JP H02248354 A JPH02248354 A JP H02248354A JP 6934489 A JP6934489 A JP 6934489A JP 6934489 A JP6934489 A JP 6934489A JP H02248354 A JPH02248354 A JP H02248354A
- Authority
- JP
- Japan
- Prior art keywords
- drying
- water
- portland cement
- cement
- hardened 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
- 239000004568 cement Substances 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 239000011398 Portland cement Substances 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 238000000465 moulding Methods 0.000 claims abstract description 7
- 238000004898 kneading Methods 0.000 claims abstract description 5
- 229920003169 water-soluble polymer Polymers 0.000 claims description 9
- 238000005452 bending Methods 0.000 abstract description 12
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 abstract description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 abstract description 5
- 229940048053 acrylate Drugs 0.000 abstract description 5
- 229920001577 copolymer Polymers 0.000 abstract description 5
- 229920002401 polyacrylamide Polymers 0.000 abstract description 4
- 150000003866 tertiary ammonium salts Chemical class 0.000 abstract description 4
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 abstract description 3
- -1 dimethylaminoethyl Chemical group 0.000 abstract description 3
- 229940047670 sodium acrylate Drugs 0.000 abstract description 3
- 229920000642 polymer Polymers 0.000 abstract 3
- 239000000047 product Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 125000000022 2-aminoethyl group Chemical group [H]C([*])([H])C([H])([H])N([H])[H] 0.000 description 3
- 125000004177 diethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 2
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 2
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 2
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- KCXMKQUNVWSEMD-UHFFFAOYSA-N benzyl chloride Chemical compound ClCC1=CC=CC=C1 KCXMKQUNVWSEMD-UHFFFAOYSA-N 0.000 description 1
- 229940073608 benzyl chloride Drugs 0.000 description 1
- 229920006319 cationized starch Polymers 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- NEHMKBQYUWJMIP-NJFSPNSNSA-N chloro(114C)methane Chemical compound [14CH3]Cl NEHMKBQYUWJMIP-NJFSPNSNSA-N 0.000 description 1
- HRYZWHHZPQKTII-UHFFFAOYSA-N chloroethane Chemical compound CCCl HRYZWHHZPQKTII-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- VAYGXNSJCAHWJZ-UHFFFAOYSA-N dimethyl sulfate Chemical compound COS(=O)(=O)OC VAYGXNSJCAHWJZ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229960003750 ethyl chloride Drugs 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- YLGXILFCIXHCMC-JHGZEJCSSA-N methyl cellulose Chemical compound COC1C(OC)C(OC)C(COC)O[C@H]1O[C@H]1C(OC)C(OC)C(OC)OC1COC YLGXILFCIXHCMC-JHGZEJCSSA-N 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- YPHQUSNPXDGUHL-UHFFFAOYSA-N n-methylprop-2-enamide Chemical compound CNC(=O)C=C YPHQUSNPXDGUHL-UHFFFAOYSA-N 0.000 description 1
- QNILTEGFHQSKFF-UHFFFAOYSA-N n-propan-2-ylprop-2-enamide Chemical compound CC(C)NC(=O)C=C QNILTEGFHQSKFF-UHFFFAOYSA-N 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920005638 polyethylene monopolymer Polymers 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はセメント硬化体の製造法に関する。更に詳しく
は曲げ強度の大きいセメント硬化体を効率よく製造する
方法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for producing a hardened cement body. More specifically, the present invention relates to a method for efficiently producing a hardened cement body with high bending strength.
従来の技術
近年、セメントを硬化させるに際し、添加水量を減少さ
せるとか、シリカヒュウムや高炉スラグの様な微粒子を
添加し、セメント硬化体の構造を緻密にし、曲げ強度を
増大させようという検討が、盛んに行われている０例え
ば特公昭５９−４３４３１には、セメント硬化体中の空
隙率、及びその大きさを減少させ、硬化体の構造を緻密
にする事により、３５ＭＰａ以上の曲げ強度を有するセ
メント硬化体が得られると、記されている。Conventional technology In recent years, there has been much research into reducing the amount of water added when curing cement, or adding fine particles such as silica fume or blast furnace slag to make the structure of the hardened cement compact and increase its bending strength. For example, in Japanese Patent Publication No. 59-43431, cement having a bending strength of 35 MPa or more was developed by reducing the porosity and size of the hardened cement and making the hardened structure denser. It is stated that a cured product is obtained.
しかし、ポルトランド系セメントを硬化させる場合、従
来技術に於いては、湿潤養生が不可欠であり、硬化温度
に於いて、飽和湿度、又は、これに近い高湿度下に、被
硬化体を長時間晒すのが常法であった０例えば前記特公
昭５９−４３４３１に於いても、ポルトランドセメント
１００部、ヒドロキンプロピルメチルセルロース３部及
び水１５部からなる混合物を混練し、硬化させるのに、
２０℃、１００％の相対湿度の雰囲気中に７日間放置し
、次いで７日間乾燥させるという方法を採っている。However, when curing Portland cement, moist curing is indispensable in the conventional technology, and the object to be cured is kept under saturated humidity or high humidity close to it for a long time at the curing temperature. For example, in the aforementioned Japanese Patent Publication No. 59-43431, a mixture of 100 parts of Portland cement, 3 parts of hydroquine propyl methylcellulose, and 15 parts of water was kneaded and hardened.
The method used is to leave it in an atmosphere of 20° C. and 100% relative humidity for 7 days, and then dry it for 7 days.
発明が解決しようとする課題
ポルトランド系セメントからその硬化体を得るにあたり
湿潤養生の工程を経ることなく高い曲げ強度を有する硬
化体を得る方法の開発が求められている。Problems to be Solved by the Invention There is a need for the development of a method for obtaining a hardened product from Portland cement that has high bending strength without going through a wet curing process.
課題を解決する為の手段
本発明者らは前記したような課題を解決すべく鋭意研究
を行った結果驚くべき事に湿潤養生をせずに加熱乾燥の
みに依って高い曲げ強度を有する硬化体が得られること
を見出し本発明に至った。Means for Solving the Problems The present inventors conducted intensive research to solve the above-mentioned problems, and surprisingly, they were able to create a cured product that has high bending strength by only heating and drying without wet curing. It was discovered that the following could be obtained, leading to the present invention.
即ち本発明はポルトランド系セメント、水溶性高分子及
び水からなる混合物を混練し成形したのち湿潤養生を行
う事なく直ちに加熱乾燥を行う事を特徴とするセメント
硬化体の製造法を提供する。That is, the present invention provides a method for producing a hardened cement product, which comprises kneading and molding a mixture of Portland cement, a water-soluble polymer, and water, and then immediately heating and drying the product without moist curing.
本発明の方法を詳細に説明する。The method of the present invention will be explained in detail.
本発明でポルトランド系セメントとは普通ポルトランド
セメント、早強ポルトランドセメント、超早強ポルトラ
ンドセメント、中庸熱ポルトランドセメント、耐硫酸塩
ポルトランドセメント、白色ポルトランドセメントを指
す、これらは単独でも、２種以上を混合して使用しても
良い、また、これらポルトランド系セメントと併用して
、アルミナセメント、ハイアルミナセメント、シリカヒ
エラム、高炉スラグ、フライアッシェ等も使用できる。In the present invention, Portland cement refers to ordinary Portland cement, early strength Portland cement, ultra early strength Portland cement, moderate heat Portland cement, sulfate-resistant Portland cement, and white Portland cement, which may be used alone or in combination of two or more. They may be used in combination, and alumina cement, high alumina cement, silica hieram, blast furnace slag, fly asche, etc. can also be used in combination with these portland cements.
又使用しうる水溶性高分子としてはヒドロキシプロピル
メチルセルローズ、部分加水分解性ポリビニールアルコ
ール、カチオン化ホリビニールアルコール、カチオン化
澱粉、ポリエチレンオキサイド、及び以下のモノマーを
原料とするホモポリマー、コポリマーがあげられる。Water-soluble polymers that can be used include hydroxypropyl methyl cellulose, partially hydrolyzed polyvinyl alcohol, cationized polyvinyl alcohol, cationized starch, polyethylene oxide, and homopolymers and copolymers made from the following monomers. It will be done.
アクリルアマイド、Ｎ、Ｎ −ジチルアクリルアマイド
、Ｎ−メチルアクリルアマイド、Ｎ−イソプロピルアク
リルアマイド、アクリル酸、アクリル酸ナトリウム、ジ
メチ（又はジエチル）アミノエチル（メタ）アクリレー
トの塩酸、又は硫酸による三級アンモニウム塩、ジメチ
ル（又はジエチル）アミノエチル（メタ）アクリレート
と塩化メチル、又は塩化エチル、塩化ベンジル、ジメチ
ル硫酸、とのメンシュドキン反応物である四級アンモニ
ム塩、Ｎ−ビニールピロリドン
これらの水溶性高分子のうち特に好ましい水溶性高分子
は、ポリアクリルアマイド、アクリルアマイドとアクリ
ル酸ナトリウムのコポリマー、ジメチル（又はジエチル
）アミノエチル（メタ）アクリレートの上記三級アンモ
ニウム塩、又は四級アンモニウム塩とアクリルアマイド
とのコポリマーである。Acrylamide, N,N-ditylacrylamide, N-methylacrylamide, N-isopropylacrylamide, acrylic acid, sodium acrylate, dimethy(or diethyl)aminoethyl(meth)acrylate with hydrochloric acid or sulfuric acid for tertiary ammonium salts, quaternary ammonium salts that are Menschudkin reaction products of dimethyl (or diethyl) aminoethyl (meth)acrylate and methyl chloride, or ethyl chloride, benzyl chloride, dimethyl sulfate, N-vinyl pyrrolidone, and N-vinyl pyrrolidone of these water-soluble polymers. Among these, particularly preferred water-soluble polymers are polyacrylamide, a copolymer of acrylamide and sodium acrylate, the above-mentioned tertiary ammonium salt of dimethyl (or diethyl) aminoethyl (meth)acrylate, or a combination of a quaternary ammonium salt and acrylamide. It is a copolymer.
これら水溶性高分子の添加量は、ポルトランド系セメン
トに対して通常３〜１５％、より好ましくは、５〜１０
％である。水溶性高分子の添加量が３％以下であると、
硬化はするものの、十分な曲げ強度が得られない、一方
１５％以上使用しても、本発明の効果は変わらず、経済
的に不利である。The amount of these water-soluble polymers added is usually 3 to 15%, more preferably 5 to 10%, based on Portland cement.
%. When the amount of water-soluble polymer added is 3% or less,
Although it hardens, sufficient bending strength cannot be obtained.On the other hand, even if 15% or more is used, the effect of the present invention remains unchanged and is economically disadvantageous.
水の添加量は、使用する水溶性高分子の種類及び添加量
に依っても異なるが、ポルトランド系セメントに対して
概ね５〜３０％であり、好ましくは１０〜２０％である
。The amount of water added varies depending on the type and amount of water-soluble polymer used, but is generally 5 to 30%, preferably 10 to 20%, based on the Portland cement.
本発明ではポルトランド系セメント、水溶性高分子、及
び水からなる混合物を、成形、硬化前に混練するが、こ
の装置としては、当部合物に強い剪断力を与えられる機
器であれば何も用いても良い、具体的には、二本ロール
ニーグー、パドル型ニーダ−スクリュー型ニーグーが使
用できる。In the present invention, a mixture consisting of Portland cement, a water-soluble polymer, and water is kneaded before being molded and hardened, but any device that can apply a strong shearing force to the compound can be used for this purpose. Specifically, a two-roll kneader and a paddle-type kneader-screw type kneader can be used.
成形機は、（真空）押し出し成形機、ロールプレス成形
機、カレンダーロール等が使用出来る。As the molding machine, a (vacuum) extrusion molding machine, a roll press molding machine, a calender roll, etc. can be used.
混練したのちの混合物は減圧又は真空下で成型するのが
好ましい。After kneading, the mixture is preferably molded under reduced pressure or vacuum.
本発明の製法においては成型後、湿潤養生を行うことな
く直ちに乾燥工程に入る。乾燥は通常５０〜１００’Ｃ
に加熱して行われる。乾燥が完了したかどうかは試料の
重量を測定することによって決められるが通常は５〜１
０時間で乾燥が完了する。In the manufacturing method of the present invention, after molding, a drying process is immediately started without performing wet curing. Drying is usually 50-100'C
It is done by heating. Whether drying is complete is determined by measuring the weight of the sample, which is usually 5 to 1.
Drying is completed in 0 hours.
本発明の製造法で得られたセメントの硬化体は３００ｋ
ｇ／ｃ−以上というような高い曲げ強度を有するもので
あり、例えば内装材、外装材として十分な性能を有する
ものである。The hardened cement obtained by the production method of the present invention is 300k
It has a high bending strength of more than g/c-, and has sufficient performance as, for example, an interior material or an exterior material.
実施例
実施例に依って本発明を、さらに具体的に説明するが、
本発明がこれに限定されるべき物でない事は言うまでも
ない。EXAMPLES The present invention will be explained in more detail with reference to Examples.
It goes without saying that the present invention is not limited to this.
実施例１
普通ポルトランドセメントｔｏｏｏ部、ポリアクリルア
マイド（日本化薬■製カヤフロックＮ−１００）７０部
をポリエチレン製の袋に入れ軽く混合した。Example 1 Too many parts of ordinary Portland cement and 70 parts of polyacrylamide (Kayafloc N-100 manufactured by Nippon Kayaku ■) were placed in a polyethylene bag and mixed lightly.
これに、水１４０部を添加し袋の外から手で籾み、内容
物を粗混合した０次いで、この混合物を二本ロールニダ
ーにかけ、４分間高剪断力下に混練した。＊り上がった
物は粘土状であり、真空押し出し成形機（本田鉄工■製
ＨＤＩ！−２型）にて、幅１０Ｃ１１゜厚み４■の板状
に押し出した。この成形物を長さ１、６ ＣＩにナイフ
で切断し、直ちに８０°Ｃの熱風乾燥機に入れ、８時間
加熱乾燥処理を行った。テンシロン−オリエンチック製
ＵＴＭ−２５００） を用い、得られた硬化物の三点曲
げ試験を行ったところ、曲げ強度１２００ｋｇ／ｃｊの
値を得た。測定はスパン間１０Ｃ１１ロードスピード３
ｍｍ１分の条件で行った。To this, 140 parts of water was added and the rice was hulled by hand from the outside of the bag, and the contents were roughly mixed.Then, this mixture was placed in a two-roll kneader and kneaded for 4 minutes under high shear force. *The risen material was clay-like, and was extruded into a plate shape with a width of 10C11° and a thickness of 4cm using a vacuum extrusion molding machine (Model HDI!-2 manufactured by Honda Iron Works). This molded product was cut with a knife to a length of 1.6 CI, and immediately placed in a hot air dryer at 80° C. for 8 hours of heat drying. When the obtained cured product was subjected to a three-point bending test using Tensilon-Orientic UTM-2500), a bending strength of 1200 kg/cj was obtained. Measurement span span 10C11 load speed 3
The test was carried out under the condition of 1 minute per mm.
実施例２
白色ポルトランドセメント１０００部、ポリアクリルア
マイド（日本化薬■製カヤフロックＮ−１００）７０部
、水１５０部を用いた以外は、実施例１と同じ処理を行
った、硬化物の曲げ強度は８７０ｋｇ／ ｃｊであった
。Example 2 Flexural strength of cured product obtained by performing the same treatment as in Example 1 except that 1000 parts of white Portland cement, 70 parts of polyacrylamide (Kayafloc N-100 manufactured by Nippon Kayaku ■), and 150 parts of water were used. was 870 kg/cj.
実施例３
普通ポルトランドセメント８５０部、シリカフニウム
１５０部、ヒドロキシプロピルメチルセルローズ（松本
油脂製薬■製マーポローズＥＭＰ−Ｈ）７０部、水１４
０部を、用いた以外は、実施例１と同じ処理を行った。Example 3 850 parts of ordinary Portland cement, silicafnium
150 parts, 70 parts of hydroxypropyl methylcellulose (Marporose EMP-H manufactured by Matsumoto Yushi Seiyaku ■), 14 parts of water
The same treatment as in Example 1 was performed except that 0 part was used.
硬化物の曲げ強度は５９０ｋｇ／ ｃ−であった。The bending strength of the cured product was 590 kg/c-.
実施例４
普通ポルトランドセメント１０００部、ジメチルアミノ
エチル（メタ）アクリレートの硫酸に依る三級アンモニ
ウム塩とアクリルアマイドとのコポリマー（日本化薬■
製カヤフロックＣ−５６６−２）６０部、水１２０部を
用いた以外は、実施例１と同じ処理を行った。硬化物の
曲げ強度は５９０ｋｇ／ｃｄであった。Example 4 1000 parts of ordinary Portland cement, a copolymer of tertiary ammonium salt of dimethylaminoethyl (meth)acrylate with sulfuric acid and acrylamide (Nippon Kayaku ■
The same treatment as in Example 1 was performed except that 60 parts of Kayafloc C-566-2) and 120 parts of water were used. The bending strength of the cured product was 590 kg/cd.
発明の効果
より簡略化された製造法により曲げ強度の大きなセメン
ト硬化体が得られるようになった。As a result of the invention, a hardened cement body with high bending strength can now be obtained by a simplified manufacturing method.
特許出願人 日本化薬株式会社Patent applicant: Nippon Kayaku Co., Ltd.
Claims (1)
なる混合物を混練し成形したのち湿潤養生を行う事なく
直ちに加熱乾燥を行う事を特徴とするセメント硬化体の
製造法1. A method for producing a hardened cement product, which comprises kneading and molding a mixture of Portland cement, a water-soluble polymer, and water, and then immediately heating and drying it without moist curing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6934489A JPH02248354A (en) | 1989-03-23 | 1989-03-23 | Production of hardened cement body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6934489A JPH02248354A (en) | 1989-03-23 | 1989-03-23 | Production of hardened cement body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02248354A true JPH02248354A (en) | 1990-10-04 |
Family
ID=13399836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6934489A Pending JPH02248354A (en) | 1989-03-23 | 1989-03-23 | Production of hardened cement body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02248354A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004018298A (en) * | 2002-06-14 | 2004-01-22 | Denki Kagaku Kogyo Kk | Cement composition for carbonated/hardened body, cement concrete composition for carbonated/hardened body and method for manufacturing carbonated/hardened body |
-
1989
- 1989-03-23 JP JP6934489A patent/JPH02248354A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004018298A (en) * | 2002-06-14 | 2004-01-22 | Denki Kagaku Kogyo Kk | Cement composition for carbonated/hardened body, cement concrete composition for carbonated/hardened body and method for manufacturing carbonated/hardened body |
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