JPH05208857A - Quick-hardening binder - Google Patents
Quick-hardening binderInfo
- Publication number
- JPH05208857A JPH05208857A JP1435692A JP1435692A JPH05208857A JP H05208857 A JPH05208857 A JP H05208857A JP 1435692 A JP1435692 A JP 1435692A JP 1435692 A JP1435692 A JP 1435692A JP H05208857 A JPH05208857 A JP H05208857A
- Authority
- JP
- Japan
- Prior art keywords
- quick
- hardening
- weight
- binder
- curing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/0045—Polymers chosen for their physico-chemical characteristics
- C04B2103/0053—Water-soluble polymers
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]
【産業上の利用分野】本発明は、数時間で実用強度が得
られ、かつ長期的にも安定した強度が得られる速硬性結
合材に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a quick-hardening binder which can be used for a practical period of time in a few hours and has a stable strength for a long period of time.
【０００２】[0002]
【従来の技術】従来の速硬性結合材は、１１ＣａＯ・７
Ａｌ2Ｏ3・ＣａＸ2（ただし、式中Ｘはハロゲン原子を
表す）及び３ＣａＯ・ＳｉＯ2、２ＣａＯ・ＳｉＯ2、３
ＣａＯ・Ａｌ2Ｏ3、４ＣａＯ・Ａｌ2Ｏ3・Ｆｅ2Ｏ3等の
ポルトランドセメントクリンカ鉱物からなる速硬性クリ
ンカに、石膏を添加してなるものであり、ジェットセメ
ントという名称などで市販されいる。このような速硬性
結合材は、１時間程度で実用強度が得られることから、
土木工事を主体に広い分野で使用されている。2. Description of the Related Art A conventional fast hardening binder is 11CaO.7.
Al 2 O 3 .CaX 2 (where X represents a halogen atom) and 3CaO.SiO 2 , 2CaO.SiO 2 , 3
The CaO · Al 2 O 3, consist of Portland cement clinker minerals such 4CaO · Al 2 O 3 · Fe 2 O 3 fast curing clinker are those formed by the addition of gypsum and are commercially available like the name Jet Cement .. Since such a rapid hardening binder can obtain practical strength in about 1 hour,
It is used in a wide range of fields mainly for civil engineering work.
【０００３】ところで、前記従来の速硬性結合材には、
実用上、特殊な施工条件下の場合それ自身が有する強度
よりもさらに大きな強度が必要とされ、当該材料の高強
度化への対応が望まれている。従来、速硬性結合材以外
の、例えばセメントあるいはコンクリートの高強度化へ
の対応としては、一般に有機系または無機系の繊維の混
入や、シリカ質の微粉末からなる混和材の添加、他の適
当な有機材料との複合化などが試みられている。By the way, the above-mentioned conventional quick-hardening binder is
Practically, under special construction conditions, a strength higher than that of itself is required, and it is desired to cope with higher strength of the material. Conventionally, as a measure for increasing the strength of cement or concrete other than fast-setting binders, generally, organic or inorganic fibers are mixed, admixtures made of fine silica powder are added, and other suitable Attempts have been made to combine it with various organic materials.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、このよ
うな対応において用いられる強化材料を速硬性結合材の
強化材料として適用するには、それぞれに一長一短があ
り、得られた速硬性結合材が前述したような場合に要求
される大きな強度を得るには至っていないのが現状であ
る。すなわち、速硬性結合材を有機材料と複合化するた
めには、例えばセメントに水分散系の樹脂エマルジョン
を添加することが、そのハンドリング上の簡便さも相ま
って比較的一般的に活用されている。しかし、その添加
量の割には期待した程強度の増大が見られず、特に、本
発明で対象としている速硬性結合材の場合には逆に強度
が低下してしまい、実際上の問題を解決するには未だ至
っていない。However, there are merits and demerits to applying the reinforcing material used in such correspondence as the reinforcing material of the quick-hardening binder, and the obtained quick-hardening binder has the above-mentioned advantages and disadvantages. In the current situation, the required high strength has not been obtained. That is, in order to combine the fast-curing binder with the organic material, for example, addition of a water-dispersed resin emulsion to cement is relatively commonly used in combination with its handling convenience. However, the expected increase in strength was not found for the added amount, and in particular, in the case of the fast-curing binder targeted by the present invention, the strength was decreased, which caused practical problems. It has not been resolved yet.
【０００５】一方、セメント又はコンクリートが硬化し
た後、これに圧力を加え樹脂を含浸硬化させて得られる
ポリマー含浸コンクリートでは、その改良特性が確実に
得られることから、前述の樹脂エマルジョンと比較して
有利であるものの、圧力を加えて樹脂を含浸硬化させる
工程が必要となり、現場施工時には実用に向かないとい
った不都合がある。On the other hand, the polymer-impregnated concrete obtained by hardening the cement or concrete and then impregnating and hardening the resin can surely obtain the improved characteristics. Although advantageous, it requires a step of impregnating and curing the resin by applying pressure, which is disadvantageous in that it is not suitable for practical use at the time of on-site construction.
【０００６】さらに、前記速硬性結合材では、その特性
の一つとして、高温時、特に施工時の外気温度が３０℃
程度になった場合に、硬化後硬化体にクラックが発生
し、圧縮強度が低下すると共に、特に内部の鉄筋に錆び
が発生し耐久性が低下するといった問題がある。本発明
は前記課題に鑑みてなされたもので、樹脂エマルジョン
の簡易さと含浸ポリマーによる改良特性の確実性とを併
せ持つ、高強度化された速硬性結合材を提供することを
目的とするものである。Further, one of the characteristics of the fast-curing binder is that the outside air temperature is 30 ° C. at high temperature, especially during construction.
When it becomes a certain level, there is a problem that cracks are generated in the cured body after curing, the compressive strength is lowered, and especially the internal reinforcing bars are rusted and the durability is lowered. The present invention has been made in view of the above problems, and an object of the present invention is to provide a high-strength, fast-setting binder having both the simplicity of a resin emulsion and the certainty of the improved properties by the impregnated polymer. ..
【０００７】[0007]
【課題を解決するための手段】本発明者等は、実用に耐
えられるハンドリングタイムを有し、高温度下での養生
においても硬化体にクラックが発生せず、したがって、
硬化体強度の増大が期待出来る速硬性結合材を得るべく
鋭意研究を重ねた結果、メラミンホルムアルデヒドとの
縮合反応により得られるメチロールメラミン等の水溶性
のメラミン樹脂と、クエン酸とを配合することにより、
全く新しい反応系を見いだし、高温の養生条件下でも硬
化体にクラックが発生せず、硬化体の強度を増大させる
ことに成功し、かかる知見に基づいて本発明を完成し
た。Means for Solving the Problems The present inventors have a handling time that can be practically used, and a cured body does not crack even during curing at a high temperature.
As a result of intensive studies to obtain a fast-curing binder that can be expected to increase the strength of the cured product, a water-soluble melamine resin such as methylol melamine obtained by a condensation reaction with melamine formaldehyde, and citric acid were added. ,
A completely new reaction system was found, cracks did not occur in the cured product even under high temperature curing conditions, and the strength of the cured product was successfully increased. The present invention was completed based on such findings.
【０００８】すなわち本発明の速硬性結合材は、１１Ｃ
ａＯ・７Ａｌ2Ｏ3・ＣａＸ2（ただし式中Ｘはハロゲン
原子を表す）及びポルトランドセメントクリンカー鉱物
からなる速硬性クリンカーにその３０重量％以下の石膏
を添加した速硬性組成物１００重量部に対し、メチロー
ルメラミン、メチルエーテル化メラミン及びその変化物
などの水溶性メラミン樹脂を１〜２０重量部、クエン酸
を０.０５重量部以上それぞれ添加してなることを前記
課題の解決手段とした。That is, the fast-curing binder of the present invention is 11C.
To 100 parts by weight of a quick-hardening composition obtained by adding 30% by weight or less of gypsum to a fast-hardening clinker composed of aO.7Al 2 O 3 .CaX 2 (where X represents a halogen atom) and Portland cement clinker mineral. , 1 to 20 parts by weight of a water-soluble melamine resin such as methylol melamine, methyl etherified melamine and its variations, and 0.05 parts by weight or more of citric acid were added to solve the above problems.
【０００９】以下、本発明を詳しく説明する。本発明の
速硬性結合材は、１１ＣａＯ・７Ａｌ2Ｏ3・ＣａＸ
2（ただし、式中Ｘはハロゲン原子を表す）及びポルト
ランドセメントクリンカー鉱物からなる速硬性クリンカ
ーにその３０重量％以下の石膏を添加した速硬性組成物
を用意し、この組成物１００重量部に対して、メチロー
ルメラミン、メチルエーテル化メラミン及びその変化物
などの水溶性メラミン樹脂を１〜２０重量部、クエン酸
を０.０５重量部以上それぞれ添加してなるものであ
る。なお、前記速硬性組成物は従来の速硬性結合材に相
当するものであるが、本発明においては便宜上これを速
硬性組成物と呼称し、本発明の速硬性結合材と区別して
いる。The present invention will be described in detail below. The quick-hardening binder of the present invention is 11CaO / 7Al 2 O 3 CaX.
2 (however, X represents a halogen atom in the formula) and a quick-hardening clinker comprising Portland cement clinker mineral with 30% by weight or less of gypsum added thereto were prepared. Then, 1 to 20 parts by weight of a water-soluble melamine resin such as methylol melamine, methyl etherified melamine and its variations, and 0.05 parts by weight or more of citric acid are added. The fast-curing composition corresponds to a conventional fast-curing binder, but in the present invention, this is called a fast-curing composition for convenience, and is distinguished from the fast-curing binder of the present invention.
【００１０】１１ＣａＯ・７Ａｌ2Ｏ3・ＣａＸ2の量と
しては、ポルトランドセメントクリンカー鉱物を加えて
なる速硬性クリンカー中の、１〜３０重量％程度が好適
とされる。そして、この速硬性クリンカーにその３０重
量％以下となるよう石膏粉末を加え、速硬性組成物を得
る。また、メチロールメラミン、メチルエーテル化メラ
ミン及びその変化物などの水溶性メラミン樹脂の添加量
としては、速硬性組成物１００重量部に対して１〜２０
重量部、好ましくは２.０〜１０.０重量部とされる。ま
た、クエン酸の添加量としては、速硬性組成物１００重
量部に対して０.０５重量部以上、好ましくは０.１〜
０.５重量部とされる。The amount of 11CaO.7Al 2 O 3 .CaX 2 is preferably about 1 to 30% by weight in the fast-curing clinker containing the Portland cement clinker mineral. Then, gypsum powder is added to this rapid-curing clinker so that its content is 30% by weight or less to obtain a rapid-curing composition. The amount of the water-soluble melamine resin such as methylol melamine, methyl etherified melamine and its variants added is 1 to 20 with respect to 100 parts by weight of the fast-curing composition.
The amount is, for example, 2.0 to 10.0 parts by weight. The amount of citric acid added is 0.05 parts by weight or more, preferably 0.1 to 100 parts by weight of the fast-curing composition.
It is set to 0.5 parts by weight.
【００１１】すなわち、水溶性メラミン樹脂の添加量が
１重量部未満ではその添加効果が認められず、一方２０
重量部を越えると得られる速硬性材料の遅れ水和反応に
よる異常膨張現象が見られ、形成される硬化体の内部に
クラックが発生して逆に硬化体の強度が低下するからで
ある。また、クエン酸の添加量が０.０５重量％未満で
はその添加効果が認められず、０.５重量部を越えると
コンクリート内部の鉄筋に錆が発生する確立が大きくな
り、実用上好ましくないからである。That is, when the amount of the water-soluble melamine resin added is less than 1 part by weight, the effect of the addition is not observed, while
This is because if the amount exceeds the range of weight, an abnormal expansion phenomenon due to a delayed hydration reaction of the quick-curing material obtained is observed, cracks occur inside the formed cured body, and conversely the strength of the cured body decreases. Also, if the amount of citric acid added is less than 0.05% by weight, the effect is not recognized, and if it exceeds 0.5 parts by weight, the probability of rusting on the reinforcing bars inside the concrete increases, which is not preferable for practical use. Is.
【００１２】なお、クエン酸を併用せず、水溶性メラミ
ン樹脂単味を添加した場合には、速硬性結合材の混練時
の粘性が不必要に高くなり、さらに得られる硬化体自体
にクラックが発生してしまい、実質的な強度低下が見ら
れ実用上好ましくない。また、クエン酸単味を添加した
場合には粘性が低下する点では好ましいが、硬化体自体
の強度向上には何ら寄与することがなく、本発明の目的
からすれば好ましくない。When the water-soluble melamine resin alone is added without using citric acid, the viscosity of the fast-curing binder at the time of kneading becomes unnecessarily high, and further, the resulting cured product itself has cracks. It is generated and a substantial decrease in strength is observed, which is not preferable in practical use. Further, addition of citric acid alone is preferable in that the viscosity is lowered, but it does not contribute to the improvement of the strength of the cured product itself, and is not preferable for the purpose of the present invention.
【００１３】このような本発明の速硬性結合材を得るに
は、例えば各成分を粉体で混合し、水を加えて混練する
か、あるいは前記添加剤を水に溶解させたものを用意
し、これを用いて速硬性組成物を混練してもよい。In order to obtain such a quick-hardening binder of the present invention, for example, the respective components are mixed in powder form, water is added and kneaded, or the above-mentioned additives are dissolved in water and prepared. The fast-curing composition may be kneaded using this.
【００１４】[0014]
【実施例】以下、実施例によって本発明を更に具体的に
説明する。試料の調製を下記の要領で行った。石灰石、
ボーキサイト、粘土、ホタル石等を配合粉砕して得た調
合原料を通常のセメントロータリーキルンで焼成し、１
１ＣａＯ・７Ａｌ2Ｏ3・ＣａＦ2＝２５重量％、３Ｃａ
Ｏ・ＳｉＯ2＝５５重量％、２ＣａＯ・ＳｉＯ2＝１０重
量％、４ＣａＯ・Ａｌ2Ｏ3・Ｆｅ2Ｏ3＝５重量％を含む
速硬性クリンカーを作製し、さらにこのクリンカーを比
表面積（ブレーン）５１００ｃｍ2／ｇに粉砕して速硬
性クリンカー粉末を得た。The present invention will be described in more detail with reference to the following examples. The sample was prepared as follows. Limestone,
The compounded raw material obtained by compounding and crushing bauxite, clay, fluorspar, etc. is fired in an ordinary cement rotary kiln, and 1
1CaO · 7Al 2 O 3 · CaF 2 = 25% by weight, 3Ca
A rapid hardening clinker containing O.SiO 2 = 55% by weight, 2CaO.SiO 2 = 10% by weight, and 4CaO.Al 2 O 3 .Fe 2 O 3 = 5% by weight was prepared. ) 5100 cm 2 / g was crushed to obtain a quick-setting clinker powder.
【００１５】また、これとは別に粉砕して用意した無水
石膏（ＣａＳＯ4含有量＝９６.４重量％、比表面積６１
００ｃｍ2／ｇ）を、前記速硬性クリンカー粉末に対し
て２０重量％の割合で混合し、速硬性組成物を調製し
た。（この配合割合は市販ジェットセメントに準じたも
のである。） 次に、得られた速硬性組成物１００重量部に対し、メチ
ロールメラミンとしてメラミンホルムアルデヒド粉末
（商品名；マドリットＭＷ909、ヘキストジャパン株式
会社製）を１〜３０重量部、無水クエン酸の果粒体を
０.１〜０.２重量部混合し、さらにこれに水４０重量部
を加えて混練し、本発明の速硬性結合材を得た。（表１
中Ｄ〜Ｈで示す） また、比較のため、表１中Ａ〜Ｃ、Ｉ、Ｊで示した配合
により前記実施例とほぼ同様にして速硬性結合材を作製
した。Separately, anhydrous gypsum prepared by crushing (CaSO 4 content = 96.4% by weight, specific surface area 61
00 cm 2 / g) was mixed with the rapid-curing clinker powder at a ratio of 20% by weight to prepare a rapid-curing composition. (This mixing ratio is based on commercially available jet cement.) Next, melamine formaldehyde powder (trade name; Madrid MW909, manufactured by Hoechst Japan Co., Ltd.) as methylol melamine based on 100 parts by weight of the obtained quick-setting composition. 1) to 30 parts by weight and 0.1 to 0.2 parts by weight of citric acid granules, and 40 parts by weight of water is further added and kneaded to obtain a fast-setting binder of the present invention. It was (Table 1
Further, for comparison, a quick-hardening binder was prepared in the same manner as in the above-mentioned Examples by the formulations shown in A to C, I, and J in Table 1 for comparison.
【００１６】[0016]
【表１】 [Table 1]
【００１７】得られた速硬性結合材（Ａ〜Ｊ）の性能試
験結果を下記に示す。なお、混練及びハンドリングタイ
ムの測定及びフロー値の測定は室温２０℃で行い、圧縮
強さに供する硬化体の養生は６０℃の恒温槽内で行い、
圧縮強度測定は室温２０℃で行った。また、硬化体中の
クラックの有無の判定については、硬化体表面に墨汁を
ハケ塗りし、目視観察することによって行った。The performance test results of the obtained quick-hardening binders (A to J) are shown below. The kneading, the handling time and the flow value were measured at room temperature of 20 ° C., and the curing of the cured product subjected to compressive strength was performed in a constant temperature bath of 60 ° C.
The compressive strength was measured at room temperature of 20 ° C. The presence or absence of cracks in the cured product was determined by brushing the surface of the cured product with ink and visually observing it.
【００１８】また、圧縮強度についてはＪＩＳ Ｒ5201
にしたがって測定した。この際、配合砂については、粒
径１.２〜０.１５ｍｍ、粗粒率２.０６の川砂を使用し
た。ハンドリングタイムについては、直径１インチ、高
さ２インチの測定用コーンを用い、ビカー針装置に取り
付けたとき降下する全重量が３５０ｇとなるよう調整し
た後以下の要領で行った。Ａ〜Ｊの速硬性結合材のペー
ストを、ＪＩＳ Ｒ5201によるフロー試験と同様にして
凝結試験枠に詰めた。そして、ビカー針装置のコーンの
尖端を前記ペースト表面に接する位置にセットし、降下
させたときの侵入深さを読み、侵入深さが１.５ｍｍに
なつたときの時間をハンドリングタイムとした。（注水
時を基準とする。）Regarding the compressive strength, JIS R5201
Was measured according to. At this time, as the blended sand, river sand having a grain size of 1.2 to 0.15 mm and a coarse grain ratio of 2.06 was used. Regarding the handling time, a measuring cone having a diameter of 1 inch and a height of 2 inches was used, and after adjusting so that the total weight dropped when it was attached to the Vicat needle device was 350 g, it was carried out in the following manner. The quick-setting binder pastes A to J were packed in a setting test frame in the same manner as the flow test according to JIS R5201. Then, the tip of the cone of the Vicat needle device was set to a position in contact with the paste surface, and the penetration depth when lowered was read, and the time when the penetration depth reached 1.5 mm was taken as the handling time. (Based on the time of water injection.)
【００１９】表１に示した結果より、Ｄ〜Ｈの本発明の
速硬性結合材は、高温養生条件下における特性に優れて
いることが確認された。すなわち、比較品Ｂに示される
ようにメラミン樹脂単味を添加したものは、比較品Ａ
（従来品）に比べハンドリングタイムに多少の改善が見
られるが、圧縮強度はクラックの発生により余り改善さ
れない。一方、同じメラミン樹脂の添加量の場合でも、
クエン酸を０.１重量％添加した本発明品（Ｇ）は、ハ
ンドリングタイムが大幅に長くなると共に、６０℃の養
生温度という速硬性結合材にとっては極めて悪条件とな
る条件下においても、クラックの発生は認められなく、
しかも短時間で実用強度に近い強度が得られ、なおかつ
最終強度も、メラミン樹脂の混合量に比例して増加し
た。From the results shown in Table 1, it was confirmed that the quick-hardening binders of D to H of the present invention have excellent properties under high temperature curing conditions. That is, as shown in the comparative product B, the melamine resin alone was added to the comparative product A.
The handling time is slightly improved compared to (conventional product), but the compressive strength is not improved so much due to the occurrence of cracks. On the other hand, even if the same amount of melamine resin is added,
The product (G) of the present invention to which 0.1% by weight of citric acid was added had a significantly long handling time and cracked even under the curing temperature of 60 ° C., which is an extremely bad condition for a fast-curing binder. Is not observed,
Moreover, the strength close to the practical strength was obtained in a short time, and the final strength was increased in proportion to the mixing amount of the melamine resin.
【００２０】また、比較例（Ｂ、Ｃ）の結果からすれ
ば、メラミン樹脂もクエン酸も共に単味で添加したので
は、６０℃の高温下の養生条件の場合硬化体のクラック
発生を防止する効果がなく、結果的に圧縮強度の低下を
来すこととなる。一方、メラミン樹脂とクエン酸とを共
存させて添加した場合（Ｄ〜Ｈ）には、高温養生条件下
においても、硬化体のクラック発生を防止することが可
能となった。さらにまた、これら本発明品（Ｄ〜Ｈ）で
は、ポリマー含浸コンクリートに見られるような強度の
増加が認められ、その増加率はメラミン樹脂の添加量と
共に増大する。しかし、メラミン樹脂の添加量が２０重
量％を越えたもの（Ｉ、Ｊ）については、逆に速硬性結
合材の遅れ水和による膨張クラックにより、強度低下が
みられた。Further, from the results of Comparative Examples (B, C), when both the melamine resin and citric acid were added alone, it was possible to prevent cracking of the cured product under curing conditions at a high temperature of 60 ° C. Has no effect, resulting in a decrease in compressive strength. On the other hand, when the melamine resin and citric acid were added together (D to H), it became possible to prevent the occurrence of cracks in the cured product even under high temperature curing conditions. Furthermore, in these products (D to H) of the present invention, an increase in strength as observed in polymer-impregnated concrete is observed, and the increase rate increases with the amount of melamine resin added. However, in the case of the addition amount of the melamine resin exceeding 20% by weight (I, J), on the contrary, the strength was decreased due to the expansion crack due to the delayed hydration of the fast-setting binder.
【００２１】[0021]
【発明の効果】以上説明したように本発明の速硬性結合
材は、高温養生条件で硬化させたものについてもクラッ
クの発生がなく、かつハンドリングが容易であり、最終
強度が大幅に増大したものとなる。したがって、本発明
の速硬性結合材にあっては従来のものに比べその用途範
囲を大幅に拡大することができる。As described above, the fast-curing binder of the present invention does not crack even when cured under high temperature curing conditions, is easy to handle, and has a significantly increased final strength. Becomes Therefore, the application range of the fast-curing binder of the present invention can be greatly expanded as compared with the conventional one.
Claims (1)
だし、式中Ｘはハロゲン原子を表す）及びポルトランド
セメントクリンカー鉱物からなる速硬性クリンカーにそ
の３０重量％以下の石膏を添加した速硬性組成物１００
重量部に対し、メチロールメラミン、メチルエーテル化
メラミン及びその変化物などの水溶性メラミン樹脂を１
〜２０重量部、クエン酸を０.０５重量部以上それぞれ
添加してなることを特徴とする速硬性結合材。1. A quick-hardening composition in which 30% by weight or less of gypsum is added to a fast-hardening clinker composed of 11CaO.7Al 2 O 3 .CaX 2 (where X represents a halogen atom) and Portland cement clinker mineral. Thing 100
1 part by weight of water-soluble melamine resin such as methylol melamine, methyl etherified melamine and its variants
˜20 parts by weight and citric acid in an amount of 0.05 parts by weight or more, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1435692A JPH05208857A (en) | 1992-01-29 | 1992-01-29 | Quick-hardening binder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1435692A JPH05208857A (en) | 1992-01-29 | 1992-01-29 | Quick-hardening binder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05208857A true JPH05208857A (en) | 1993-08-20 |
Family
ID=11858794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1435692A Withdrawn JPH05208857A (en) | 1992-01-29 | 1992-01-29 | Quick-hardening binder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05208857A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2724649A1 (en) * | 1995-09-15 | 1996-03-22 | Sandoz Sa | Quick-setting cement compsns. useful as shotcrete |
-
1992
- 1992-01-29 JP JP1435692A patent/JPH05208857A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2724649A1 (en) * | 1995-09-15 | 1996-03-22 | Sandoz Sa | Quick-setting cement compsns. useful as shotcrete |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990408 |