JP2000034150A - Suppressant for heat of hydration of cement and cement composition - Google Patents
Suppressant for heat of hydration of cement and cement compositionInfo
- Publication number
- JP2000034150A JP2000034150A JP20185898A JP20185898A JP2000034150A JP 2000034150 A JP2000034150 A JP 2000034150A JP 20185898 A JP20185898 A JP 20185898A JP 20185898 A JP20185898 A JP 20185898A JP 2000034150 A JP2000034150 A JP 2000034150A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- cement
- heat
- particle size
- less
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/0068—Ingredients with a function or property not provided for elsewhere in C04B2103/00
- C04B2103/0089—Agents for reducing heat of hydration
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、土木、建築工事に
おいて、強度発現性を損なうことなくセメントの水和熱
を抑制することができるセメント水和熱抑制材に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-of-hydration inhibitor for cement capable of suppressing the heat of hydration of cement in civil engineering and construction work without impairing the strength development.
【０００２】[0002]
【従来の技術とその課題】従来からセメントを水和させ
ると水和熱が発生し、大量打設を行うとその熱が蓄積さ
れ、温度ひび割れが発生することが知られている。そし
て、最大寸法が80cm以上で、コンクリートと外気温との
差が25℃以上となることが想定されるマスコンクリート
打設では、例えば、セメント水和熱抑制材を使用したり
して水和熱を抑制することがおこなわれている（JASS 5
コンクリート標準示方書）。水和熱が発生し、温度ひ
び割れが発生することを防止する方法として、セメント
に対して非晶質カルシウムアルミネートと石膏とを含有
してなる低発熱低乾燥収縮性セメント組成物や、粒度を
調整した特殊セメントを使用することなどが提案されて
いる（特開昭57−160947号公報、特開昭64−9836号公
報）。しかしながら、これらの方法では、充分な水和熱
抑制効果がないため、大量打設ができないなどの課題が
あった。また、デキストリンを混合した水和熱抑制材が
提案されているが、凝結が遅延するおそれがあるという
課題があった（特開平 1−242447号公報）。2. Description of the Related Art It has been known that when hydrating cement, heat of hydration is generated, and when the cement is poured in a large amount, the heat is accumulated and temperature cracks are generated. In mass concrete casting where the maximum dimension is 80 cm or more and the difference between the concrete and the outside air temperature is expected to be 25 ° C. or more, for example, the hydration heat (JASS 5
Concrete Standard Specifications). Heat of hydration is generated, and as a method for preventing the occurrence of temperature cracks, a low heat generation low drying shrinkage cement composition containing amorphous calcium aluminate and gypsum with respect to cement, It has been proposed to use adjusted special cement (JP-A-57-160947, JP-A-64-9836). However, these methods do not have a sufficient effect of suppressing heat of hydration, and thus have problems such as the inability to cast a large amount. In addition, although a heat-of-hydration inhibitor mixed with dextrin has been proposed, there is a problem that coagulation may be delayed (Japanese Patent Application Laid-Open No. 1-242447).
【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、特定粒度のカルシウムフロロアルミネ
ートと硫酸塩など、特定の材料を使用することにより、
前記課題が解決される知見を得て本発明を完成するに至
った。The present inventor has made various studies to solve the above-mentioned problems, and as a result, by using specific materials such as calcium fluoroaluminate and sulfate having a specific particle size,
The present invention has been completed with the knowledge that the above-mentioned problems can be solved.
【０００４】[0004]
【課題を解決するための手段】即ち、本発明は、カルシ
ウムフロロアルミネート、硫酸塩、及び二種類以上の有
機酸類とを含有してなるセメント水和熱抑制材であり、
カルシウムフロロアルミネートが、粒径が88μｍ以下
で、44μｍ残分が10重量％以下、１μｍ以下が１〜15重
量％、及び残りが１〜44μｍである該水和熱抑制材であ
り、さらに、炭酸塩を含有してなる該セメント水和熱抑
制材であり、特定粒度のカルシウムフロロアルミネート
と硫酸塩、二種類以上の有機酸類、及び炭酸塩を含有し
てなる該セメント水和熱抑制材であり、有機酸類が、ク
エン酸、リンゴ酸、酒石酸、及びグルコン酸又はそれら
の塩である該セメント水和熱抑制材であり、セメントと
該セメント水和熱抑制材を含有してなるセメント組成物
である。That is, the present invention provides a cement hydration heat-suppressing material comprising calcium fluoroaluminate, sulfate, and two or more organic acids.
The calcium fluoraluminate is a heat-of-hydration inhibitor having a particle size of 88 μm or less, a 44 μm residue of 10% by weight or less, a 1 μm or less of 1 to 15% by weight, and a remainder of 1 to 44 μm. The cement hydration heat-suppressing material comprising a carbonate, the calcium fluoraluminate having a specific particle size and a sulfate, two or more kinds of organic acids, and a carbonate. Wherein the organic acid is citric acid, malic acid, tartaric acid, and gluconic acid or a salt thereof, wherein the cement hydration heat inhibitor is a cement composition comprising cement and the cement hydration heat inhibitor. Things.
【０００５】以下、本発明をさらに詳細に説明する。本
発明で使用するカルシウムフロロアルミネート（以下Ｆ
ＣＡという）とは、CaO 含有のカルシア源、Al2O3 含有
のアルミナ源、及びCaF2含有のフッ素源等の各原料を混
合して、キルンでの焼成や、電気炉での溶融などの熱処
理をして得られ、CaO 、Al2O3 、及びCaF2を主たる成分
とし、水和活性を有する物質の総称である。そのうち、
CaO 、Al2O3 、及びCaF2のモル比が、３：３：１であ
る、3CaO・3Al2O3・CaF2（C3A3CaF2）になるような割合
の鉱物組成をもつものが好ましい。また、前述の熱処理
物を圧搾空気等で吹き飛ばすなど、急冷することにより
得られる非晶質の使用は強度発現性の面から好ましい。
また、本発明では、その他、ＦＣＡに工業的に含まれる
不純物には制約を受けない。ＦＣＡは粉末であり、その
粒度は88μｍ以下で、44μｍ残分が10重量％以下、１μ
ｍ以下が１〜15重量％、及び残りが１〜44μｍが好まし
く、44μｍ残分が３〜７重量％、１μｍ以下が５〜８重
量％、及び残りが１〜44μｍであることがより好まし
い。粒径が88μｍを超えると温度抑制効果や強度発現性
が悪くなるおそれがあり、44μｍ残分が10重量％を超え
ると膨張性が大きくなるおそれがある。また、１μｍ以
下が１重量％未満では温度抑制効果や強度発現性が悪く
なるおそれがあり、15重量％を超えると凝結が早くなる
おそれがある。Hereinafter, the present invention will be described in more detail. The calcium fluoroaluminate used in the present invention (hereinafter referred to as F
CA) is a mixture of raw materials such as a CaO-containing calcia source, an Al 2 O 3 -containing alumina source, and a CaF 2 -containing fluorine source, for example, firing in a kiln or melting in an electric furnace. It is a general term for substances obtained by heat treatment, having CaO 2 , Al 2 O 3 , and CaF 2 as main components and having hydration activity. Of which
The molar ratio of CaO, Al 2 O 3 and CaF 2 is 3: 3: 1, and the mineral composition is such that it becomes 3CaO.3Al 2 O 3 .CaF 2 (C 3 A 3 CaF 2 ) Are preferred. The use of an amorphous material obtained by quenching, such as blowing the above-mentioned heat-treated product with compressed air or the like, is preferable from the viewpoint of developing strength.
Further, in the present invention, there are no other restrictions on impurities industrially contained in FCA. FCA is a powder having a particle size of 88 μm or less and a residue of 44 μm of 10% by weight or less, 1 μm.
m is preferably from 1 to 15% by weight and the remainder from 1 to 44 μm, more preferably from 3 to 7% by weight of the remainder of 44 μm, from 5 to 8% by weight and from 1 to 44 μm, and more preferably from 1 to 44 μm. If the particle size exceeds 88 μm, the effect of suppressing temperature and the ability to develop strength may be deteriorated, and if the 44 μm residue exceeds 10% by weight, expandability may increase. Further, when the particle size is 1 μm or less, the temperature control effect and the strength expression may be deteriorated when the content is less than 1% by weight, and when the content exceeds 15% by weight, the setting may be accelerated.
【０００６】本発明で使用する硫酸塩としては、硫酸ナ
トリウム、硫酸アルミニウム、及び硫酸カルシウム等が
挙げられ、そのうち、硫酸カルシウムであるセッコウの
使用が好ましい。セッコウとしては、二水セッコウ、半
水セッコウ、及び無水セッコウのいずれの使用も可能で
あるが、急硬性と強度発現性の面で無水セッコウ、特
に、II型無水セッコウの使用がより好ましい。硫酸塩の
粒度は、88μｍ以下で、44μｍ残分が20重量％以下、１
μｍ以下が２〜15重量％、及び残りが１〜44μｍである
ことが好ましい。粒径が88μｍを超えると温度抑制効果
や強度発現性が悪くなるおそれがあり、44μｍ残分が20
重量％を超えると温度抑制効果や強度発現性が悪くなる
おそれがある。また、１μｍ以下が２重量％未満では強
度発現性が悪くなるおそれがあり、15重量％を超えると
温度抑制効果や強度発現性の影響が少なく粉砕効率が悪
くなるおそれがある。本発明ではＦＣＡに対する硫酸塩
の使用量が重要であって、ＦＣＡ 100重量部に対して、
50〜300 重量部が好ましく、100 〜200 重量部がより好
ましい。50重量部未満では強度発現性が悪くなるおそれ
があり、300 重量部を越えると異常膨張するおそれがあ
る。[0006] Examples of the sulfate used in the present invention include sodium sulfate, aluminum sulfate, calcium sulfate and the like. Among them, gypsum which is calcium sulfate is preferably used. As gypsum, any of dihydrate gypsum, hemihydrate gypsum and anhydrous gypsum can be used, but anhydrous gypsum, particularly type II anhydrous gypsum, is more preferable in terms of rapid hardening and strength development. The particle size of the sulfate is 88 μm or less, and the residue of 44 μm is 20% by weight or less.
It is preferred that the particle size is 2 to 15% by weight and the remainder is 1 to 44 µm. If the particle size exceeds 88 μm, there is a possibility that the temperature suppression effect and the strength expression may be deteriorated,
If the content is more than 10% by weight, the temperature suppressing effect and the strength expression may be deteriorated. If 1 μm or less is less than 2% by weight, the strength expression may be deteriorated. If it exceeds 15% by weight, the effect of temperature suppression and strength expression may be small and the pulverization efficiency may be deteriorated. In the present invention, the amount of sulfate relative to FCA is important.
It is preferably 50 to 300 parts by weight, more preferably 100 to 200 parts by weight. If the amount is less than 50 parts by weight, strength development may be deteriorated, and if it exceeds 300 parts by weight, abnormal expansion may occur.
【０００７】本発明で使用する有機酸類とは、クエン
酸、リンゴ酸、酒石酸、及びグルコン酸等のオキシカル
ボン酸又はそれらの塩等であり、市販品の粒度で使用可
能である。本発明では、これら有機酸類を二種類以上用
いることが重要で、有機酸類を二種類以上用いることに
より、大量打設で充分な作業時間が得られる。具体的
に、クエン酸又はその塩と酒石酸又はその塩、クエン酸
又はその塩とグルコン酸塩、リンゴ酸又はその塩と酒石
酸又はその塩、及びリンゴ酸又はその塩とグルコン酸塩
等の使用が好ましい。有機酸類の使用量は、ＦＣＡと硫
酸塩の合計 100重量部に対して、0.2 〜５重量部が好ま
しく、0.5 〜３重量部がより好ましい。0.2 重量部未満
では作業時間の調整が困難になるおそれがあり、５重量
部を越えると強度発現性を阻害するおそれがある。The organic acids used in the present invention include oxycarboxylic acids such as citric acid, malic acid, tartaric acid and gluconic acid and salts thereof, and can be used in the form of commercially available particles. In the present invention, it is important to use two or more of these organic acids, and by using two or more of these organic acids, a sufficient working time can be obtained with a large amount of casting. Specifically, use of citric acid or a salt thereof and tartaric acid or a salt thereof, citric acid or a salt thereof and a gluconate, malic acid or a salt thereof and tartaric acid or a salt thereof, and malic acid or a salt thereof and a gluconate salt, etc. preferable. The amount of the organic acids used is preferably 0.2 to 5 parts by weight, more preferably 0.5 to 3 parts by weight, based on 100 parts by weight of the total of FCA and sulfate. If the amount is less than 0.2 parts by weight, it may be difficult to adjust the working time, and if it exceeds 5 parts by weight, the strength may be impaired.
【０００８】本発明で使用する炭酸塩としては、炭酸ナ
トリウムや炭酸カリウム、重炭酸ナトリウムや重炭酸カ
リウムなどいずれも使用可能であり、市販品の粒度で使
用可能である。炭酸塩の使用量は、有機酸類の１〜10重
量倍が好ましく、２〜８重量倍がより好ましい。１重量
倍未満又は10重量倍を越えると作業時間の調整が困難に
なるおそれがある。[0008] As the carbonate used in the present invention, any of sodium carbonate, potassium carbonate, sodium bicarbonate and potassium bicarbonate can be used, and it can be used in a particle size of a commercial product. The amount of the carbonate used is preferably 1 to 10 times by weight, more preferably 2 to 8 times by weight of the organic acids. If the weight is less than 1 time or more than 10 times, it may be difficult to adjust the working time.
【０００９】本発明は、ＦＣＡ、硫酸塩、及び二種類以
上の有機酸類、又はさらに炭酸塩を含有してなるセメン
ト水和熱抑制材であり、その使用量は、セメント 100重
量部に対して、５〜40重量部が好ましく、10〜30重量部
がより好ましい。５重量部未満又は40重量部を超えると
水和熱抑制効果が少なくなるおそれがある。The present invention is a cement hydration heat inhibitor containing FCA, sulfate, and two or more kinds of organic acids, or further carbonates, in an amount of 100 parts by weight of cement. , 5 to 40 parts by weight, more preferably 10 to 30 parts by weight. If the amount is less than 5 parts by weight or exceeds 40 parts by weight, the effect of suppressing heat of hydration may be reduced.
【００１０】ここで、セメントとしては、普通、早強、
及び超早強等の各種ポルトランドセメントや、これらポ
ルトランドセメントに高炉スラグ等のポゾラン物質を混
合した各種混合セメントが使用可能である。[0010] Here, as cement, ordinary, early strength,
Various types of Portland cement, such as super-high-strength cement, and various types of mixed cement obtained by mixing a pozzolanic substance such as blast furnace slag with these Portland cements can be used.
【００１１】本発明のセメント水和熱抑制材を用いたモ
ルタルやコンクリートは、水和熱が小さく、大量打設が
可能であると共に、強度発現性が良好で、コンクリート
二次製品やマスコンクリートなどに幅広く使用可能であ
る。The mortar and concrete using the cement hydration heat-suppressing material of the present invention have a low heat of hydration, can be cast in a large amount, and have good strength development, and can be used as secondary concrete products or mass concrete. Can be used widely.
【００１２】[0012]
【実施例】以下、実験例に基づいて詳細に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on experimental examples.
【００１３】実験例１ カルシア源30.5重量部、アルミナ源55.5重量部、及びフ
ッ素源14.0重量部を電気炉で溶融し、５kgf/cm2 の圧縮
空気で吹き飛ばし、急冷して、鉱物組成がC3A3CaF2に相
当するクリンカーを製造し、粉砕して、88μｍ以下で、
１μｍ以下が 5.5重量％、44μｍ残分が 6.0重量％、及
び残りが１〜44μｍの粒度のＦＣＡを調製した。調製し
たＦＣＡ、ＦＣＡ 100重量部に対して、88μｍ以下で、
１μｍ以下10重量％、44μｍ残分5.5 重量％、及び残り
が１〜４μｍの粒度の硫酸塩 150重量部、ＦＣＡと硫酸
塩の合計 100重量部に対して、表１に示す有機酸類を配
合してセメント水和熱抑制材を調製した。セメント砂比
（Ｃ／Ｓ）１／１、水セメント比（Ｗ／Ｃ）43％の配合
で、セメント 100重量部に対して、セメント水和熱抑制
材33重量部を混合し、モルタルを製造し、その硬化時
間、圧縮強度、温度差、及びひび割れを測定した。結果
を表１に併記する。Experimental Example 1 30.5 parts by weight of a calcia source, 55.5 parts by weight of an alumina source, and 14.0 parts by weight of a fluorine source were melted in an electric furnace, blown off with 5 kgf / cm 2 of compressed air, quenched, and the mineral composition was changed to C 3 A clinker corresponding to A 3 CaF 2 is produced and pulverized to a size of 88 μm or less,
An FCA having a particle size of 5.5% by weight of 1 μm or less, 6.0% by weight of a 44 μm residue, and 1 to 44 μm of a remainder was prepared. For the prepared FCA, 100 parts by weight of FCA, 88 μm or less,
The organic acids shown in Table 1 were added to 150 parts by weight of sulfate having a particle size of 1 μm or less, 10% by weight of 44 μm, 5.5% by weight of the remainder, and 1 to 4 μm, and 100 parts by weight of FCA and sulfate in total. Thus, a cement hydration heat control material was prepared. A mortar is manufactured by mixing cement sand ratio (C / S) 1/1 and water cement ratio (W / C) 43%, and mixing 100 parts by weight of cement with 33 parts by weight of cement hydration heat control material. Then, the curing time, compressive strength, temperature difference, and crack were measured. The results are also shown in Table 1.
【００１４】＜使用材料＞ カルシア源：生石灰、市販品 アルミナ源：ボーキサイト、市販品 フッ素源 ：螢石、市販品 硫酸塩 ：無水セッコウ、市販品を所定の粒度に粉砕 有機酸類ａ：クエン酸、試薬 有機酸類ｂ：グルコン酸ナトリウム、試薬 有機酸類ｃ：リンゴ酸、試薬 有機酸類ｄ：酒石酸、試薬 有機酸類ｅ：クエン酸ナトリウム、試薬 有機酸類ｆ：酒石酸ナトリウム、試薬 セメント ：普通ポルトランドセメント、市販品 細骨材 ：姫川産天然砂 水 ：水道水<Materials> Calcia source: quick lime, commercial product Alumina source: bauxite, commercial product Fluorine source: fluorite, commercial product Sulfate: anhydrous gypsum, pulverized commercial product to predetermined particle size Organic acids a: citric acid, Reagents Organic acids b: sodium gluconate, reagents Organic acids c: malic acid, reagents Organic acids d: tartaric acid, reagents Organic acids e: sodium citrate, reagents Organic acids f: sodium tartrate, reagents Cement: ordinary Portland cement, commercial product Fine aggregate: Himekawa natural sand Water: Tap water
【００１５】＜測定方法＞ 硬化時間 ：練り上がり温度が１℃上昇した時点 圧縮強度 ：４×４×16cmの供試体に成形しアムスラー
で測定 温度差 ：モルタルを直径15cm、高さ30cm、及び厚さ
５cmの円筒発泡スチロールに詰め、密閉した後モルタル
中心部の温度を測定し、モルタルの練り上がり温度と最
高温度との差を温度差とした。 ひび ：目視観察<Measurement method> Curing time: When the kneading temperature rises by 1 ° C. Compressive strength: Molded into a 4 × 4 × 16 cm specimen and measured with Amsler Temperature difference: Mortar 15 cm in diameter, 30 cm in height, and thickness After filling in a 5 cm-thick cylindrical styrofoam and sealing, the temperature at the center of the mortar was measured, and the difference between the kneading temperature of the mortar and the maximum temperature was defined as the temperature difference. Crack: Visual observation
【００１６】[0016]
【表１】 [Table 1]
【００１７】実験例２ 実験例１と同様にクリンカーを製造し、88μｍ以下で表
２に示す粒度に粉砕し、ＦＣＡを調製した。ＦＣＡと硫
酸塩の合計 100重量部に対して、 0.8重量部の有機酸類
ａと 0.4重量部の有機酸類ｂ、さらに、有機酸類に対し
て、３重量倍の炭酸塩イを配合してセメント水和熱抑制
材を調製したこと以外は実験例１と同様に行った。結果
を表２に併記する。Experimental Example 2 A clinker was produced in the same manner as in Experimental Example 1, and pulverized to a particle size of 88 μm or less to the particle size shown in Table 2, thereby preparing FCA. 0.8 parts by weight of organic acids a and 0.4 parts by weight of organic acids b with respect to 100 parts by weight of the total of FCA and sulfate, and 3 parts by weight of carbonate a with respect to the organic acids are mixed with cement water. The procedure was performed in the same manner as in Experimental Example 1 except that the sum heat suppressing material was prepared. The results are also shown in Table 2.
【００１８】＜使用材料＞ 炭酸塩イ ：炭酸カリウム、試薬<Materials used> Carbonate a: Potassium carbonate, reagent
【００１９】[0019]
【表２】 [Table 2]
【００２０】実験例３ ＦＣＡ 100重量部に対して、 150重量部の表３に示す粒
度の硫酸塩と、ＦＣＡと硫酸塩の合計 100重量部に対し
て、 0.8重量部の有機酸類ａと 0.4重量部の有機酸類
ｂ、さらに、有機酸類に対して、３重量倍の炭酸塩イを
用いたこと以外は実験例１と同様に行った。結果を表３
に併記する。Experimental Example 3 150 parts by weight of sulfate having the particle size shown in Table 3 with respect to 100 parts by weight of FCA, and 0.8 part by weight of organic acid a and 0.4 part by weight with respect to 100 parts by weight of FCA and sulfate in total. The procedure was performed in the same manner as in Experimental Example 1 except that the organic acid b was used in 3 parts by weight of the organic acid b and the organic acid was used 3 times by weight. Table 3 shows the results
It is described together.
【００２１】[0021]
【表３】 [Table 3]
【００２２】実験例４ ＦＣＡ 100重量部に対して、表４に示す、１μｍ以下10
重量％、44μｍ残分 5.5重量％、及び残りが１〜44μｍ
の硫酸塩、有機酸類、及び炭酸塩ロを配合したこと以外
は実験例１と同様に行った。結果を表３に併記する。な
お、比較のため、ＦＣＡの代わりに、生成物のCaO ：Al
2O3 のモル比が12；７（ 12CaO・7Al2O3）と、１：１
（ CaO・Al2O3 ）になるような割合で各種原料を配合し
て熱処理し、急冷して調製したカルシウムアルミネート
用いて同様に行った。結果を表３に併記する。Experimental Example 4 1 μm or less as shown in Table 4 with respect to 100 parts by weight of FCA.
% By weight, 44 μm residue 5.5% by weight, and remainder 1 to 44 μm
The same procedure as in Experimental Example 1 was conducted except that the sulfate, organic acids, and carbonate b were mixed. The results are also shown in Table 3. For comparison, the product CaO 2: Al was used instead of FCA.
The molar ratio of 2 O 3 is 12: 7 (12CaO · 7Al 2 O 3 ) and 1: 1
(CaO.Al 2 O 3 ) Various raw materials were blended in such proportions as to obtain a heat treatment, followed by rapid cooling to prepare calcium aluminate. The results are also shown in Table 3.
【００２３】＜使用材料＞ 炭酸塩ロ ：炭酸ナトリウム、試薬<Materials used> Carbonate b: Sodium carbonate, reagent
【００２４】[0024]
【表４】 [Table 4]
【００２５】[0025]
【発明の効果】本発明のセメント水和熱抑制材を使用す
ることにより、次のような効果が得られる。 (1) 水和発熱量が少ないため、温度応力が小さく、大量
打設しても耐久性を損なうことがない。 (2) 水和熱抑制材としてポルトランド系のセメントが使
用できるので経済的である。 (3) 強度発現性が良好であるので、工期の短縮が可能で
ある。 (4) 大量打設に充分な作業時間が得られる。The following effects can be obtained by using the cement hydration heat control material of the present invention. (1) Due to a small amount of heat generated by hydration, the temperature stress is small, and the durability is not impaired even when a large amount is poured. (2) Portland cement can be used as a hydration heat suppressant, so it is economical. (3) Since the strength development is good, the construction period can be shortened. (4) Work time sufficient for mass casting is obtained.
Claims (6)
塩、及び二種類以上の有機酸類を含有してなるセメント
水和熱抑制材。1. A cement hydration heat-suppressing material containing calcium fluoroaluminate, sulfate, and two or more organic acids.
量％以下、１μｍ以下が１〜15重量％、及び残りが１〜
44μｍであるカルシウムフロロアルミネート、硫酸塩、
並びに、二種類以上の有機酸類を含有してなるセメント
水和熱抑制材。2. A particle size of 88 μm or less, a 44 μm residue of 10% by weight or less, a 1 μm or less of 1 to 15% by weight, and a remainder of 1 to 15% by weight.
44 μm calcium fluoroaluminate, sulfate,
And a cement hydration heat control material containing two or more organic acids.
量％以下、１μｍ以下が１〜15重量％、及び残りが１〜
44μｍであるカルシウムフロロアルミネート、硫酸塩、
二種類以上の有機酸類、並びに、炭酸塩を含有してなる
セメント水和熱抑制材。3. The particle size is 88 μm or less, 44 μm residue is 10% by weight or less, 1 μm or less is 1 to 15% by weight, and the remainder is 1 to 15% by weight.
44 μm calcium fluoroaluminate, sulfate,
A cement hydration heat inhibitor containing two or more organic acids and a carbonate.
分が20重量％以下、１μｍ以下が２〜15重量％、及び残
りが１〜44μｍであることを特徴とする請求項１〜３の
うちの１記載のセメント水和熱抑制材。4. The sulfate according to claim 1, wherein the particle size of the sulfate is 88 μm or less, the residue of 44 μm is 20% by weight or less, 1 μm or less is 2 to 15% by weight, and the remainder is 1 to 44 μm. 4. The heat-inhibiting material for cement hydration according to one of the three aspects.
酸、及びグルコン酸又はそれらの塩であることを特徴と
する請求項１〜４のうちの１項記載のセメント水和熱抑
制材。5. The heat inhibiting material for cement hydration according to claim 1, wherein the organic acids are citric acid, malic acid, tartaric acid, gluconic acid or a salt thereof.
記載のセメント水和熱抑制材とを含有してなるセメント
組成物。6. A cement composition comprising a cement and the cement hydration heat inhibitor according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20185898A JP2000034150A (en) | 1998-07-16 | 1998-07-16 | Suppressant for heat of hydration of cement and cement composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20185898A JP2000034150A (en) | 1998-07-16 | 1998-07-16 | Suppressant for heat of hydration of cement and cement composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000034150A true JP2000034150A (en) | 2000-02-02 |
Family
ID=16448063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20185898A Pending JP2000034150A (en) | 1998-07-16 | 1998-07-16 | Suppressant for heat of hydration of cement and cement composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000034150A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7295918B2 (en) | 2002-07-03 | 2007-11-13 | Toyota Jidosha Kabushiki Kaisha | Automobile and control method of automobile |
| KR101000862B1 (en) | 2010-04-23 | 2010-12-13 | 주식회사 삼표 | Hydration heat reducer & super low heat concrete composite |
| KR102111619B1 (en) * | 2019-09-16 | 2020-05-15 | 효림이엔아이(주) | Hybrid lightweight mortar composition And repair and reinforcement method Using the same |
| KR102143854B1 (en) * | 2019-09-16 | 2020-08-12 | 효림이엔아이(주) | Hybrid lightweight mortar composition |
| KR102156553B1 (en) * | 2019-10-15 | 2020-09-17 | 효림이엔아이(주) | Repair mortar composition with excellent weather resistance and repair and reinforcement method using the same |
-
1998
- 1998-07-16 JP JP20185898A patent/JP2000034150A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7295918B2 (en) | 2002-07-03 | 2007-11-13 | Toyota Jidosha Kabushiki Kaisha | Automobile and control method of automobile |
| KR101000862B1 (en) | 2010-04-23 | 2010-12-13 | 주식회사 삼표 | Hydration heat reducer & super low heat concrete composite |
| KR102111619B1 (en) * | 2019-09-16 | 2020-05-15 | 효림이엔아이(주) | Hybrid lightweight mortar composition And repair and reinforcement method Using the same |
| KR102143854B1 (en) * | 2019-09-16 | 2020-08-12 | 효림이엔아이(주) | Hybrid lightweight mortar composition |
| KR102156553B1 (en) * | 2019-10-15 | 2020-09-17 | 효림이엔아이(주) | Repair mortar composition with excellent weather resistance and repair and reinforcement method using the same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1420000A1 (en) | CEMENT ADMIXTURE&comma; CEMENT COMPOSITION&comma; AND METHOD FOR SUPPRESSING CARBONATION USING THE SAME | |
| JP4616113B2 (en) | Quick-hardening clinker and cement composition | |
| JP5783625B2 (en) | Low temperature rapid hardening cement admixture and low temperature rapid hardening cement composition | |
| JP7037879B2 (en) | Early-strength admixture for secondary products and early-strength concrete for secondary products | |
| JP6983963B1 (en) | Cement composition | |
| JP2001328856A (en) | Nonshrinking mortar composition and quick-hardenable nonshrinking mortar composition | |
| JP2000034150A (en) | Suppressant for heat of hydration of cement and cement composition | |
| JP3199454B2 (en) | Cement admixture and cement composition | |
| JPH09301756A (en) | Quick setting agent, spraying material and spraying method using them | |
| JPH11199286A (en) | Accelerator, spraying material and spraying using the same | |
| JP4606631B2 (en) | Cement admixture and cement composition | |
| JP2824273B2 (en) | Cement admixture | |
| JP4145378B2 (en) | Wet spraying method | |
| JP4570749B2 (en) | Modified gypsum and cement admixture using the same | |
| JP3367576B2 (en) | Hydration heat generation time adjusting material for cement and cement composition | |
| JPH02302352A (en) | Rapid hardening type self-leveling composition for floor covering material | |
| JP4093622B2 (en) | Quick setting sprayed concrete and spraying method using the same | |
| JP2000281407A (en) | Cement admixture and cement composition | |
| JP7037878B2 (en) | Early-strength admixture for secondary products and early-strength concrete for secondary products | |
| JP2716784B2 (en) | Cement hardened material | |
| JPH0797246A (en) | Cement admixture and cement composition | |
| JPH10330147A (en) | Spraying material, concrete for spraying and spraying method using the same | |
| JPH07305047A (en) | Static crushing material | |
| JPH10265248A (en) | Cement admixture and cement composition using the same | |
| JPH08310846A (en) | Cement admixture, cement composition and injecting material composed thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Effective date: 20041112 Free format text: JAPANESE INTERMEDIATE CODE: A621 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20070926 |
|
| A131 | Notification of reasons for refusal |
Effective date: 20071002 Free format text: JAPANESE INTERMEDIATE CODE: A131 |
|
| A521 | Written amendment |
Effective date: 20071120 Free format text: JAPANESE INTERMEDIATE CODE: A523 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20080304 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20080701 |