JP2571627B2 - Additives for compacted concrete - Google Patents
Additives for compacted concreteInfo
- Publication number
- JP2571627B2 JP2571627B2 JP1278365A JP27836589A JP2571627B2 JP 2571627 B2 JP2571627 B2 JP 2571627B2 JP 1278365 A JP1278365 A JP 1278365A JP 27836589 A JP27836589 A JP 27836589A JP 2571627 B2 JP2571627 B2 JP 2571627B2
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- compacted concrete
- cement
- additive
- present
- 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
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
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/38—Polysaccharides or derivatives thereof
-
- 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
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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)
- Road Paving Structures (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、転圧コンクリート及びモルタルの特性を改
善するための添加剤に関する。The present invention relates to an additive for improving the properties of compacted concrete and mortar.
［従来の技術及び発明が解決しょうとする問題点］ 近年、我が国においても、転圧コンクリートが普及し
てきている。この転圧コンクリート（RCC）は、ゼロス
ランプのコンクリートであり、通常のコンクリートの性
状とかなり異なる。特に、極端に水分を減少させるため
に、セメントの水和に伴う発熱並びに直射日光による水
分蒸発により、混練から施工までの運搬時間の間に充填
率が低下し、強度の低下やひびわれが問題となり、夏期
の施工の問題となり、夏期の施工の問題点として指摘さ
れている。[Problems to be Solved by Conventional Techniques and Inventions] In recent years, compacted concrete has become widespread in Japan. This compacted concrete (RCC) is a zero slump concrete, which is quite different from the properties of ordinary concrete. In particular, due to the extreme decrease in water content, the heat generated by the hydration of cement and the evaporation of water due to direct sunlight reduce the filling rate during the transport time from kneading to construction, resulting in problems such as reduced strength and cracking. However, it has been pointed out that summer construction is a problem and that summer construction is problematic.
また、転圧コンクリートの施工は、30cmの厚さまでと
云われており、重交通の場合に30cm以上の板厚に施工す
るため、二層打ちする際に付着の問題点が、指摘されて
いる。In addition, the construction of compacted concrete is said to be up to 30 cm thick, and in the case of heavy traffic, it is to be applied to a thickness of 30 cm or more, so the problem of adhesion when double-layered is pointed out, .
従って、本発明者らは、前記の転圧コンクリートの暑
中における欠点に関して、鋭意検討した結果、転圧コン
クリートの暑中の施工で生じるひび割れが、水和反応が
外気温により更に促進されてコンクリートが高温になる
ことによる温度ひび割れに主な原因があることを見出し
た。従って、本発明は、水和反応による発熱を抑制する
ことができ、コンクリートの強度の向上できる転圧コン
クリート用添加剤を提供することを目的にする。本発明
は、更に、水和発熱抑制効果を有すると同時に、転圧コ
ンクリート舗装の暑中打設における充填率の輸送による
低下を防止でき、ひいては、強度低下を起こし、問題と
なっている転圧コンクリートへ適用できる添加剤を提供
することを目的にする。Accordingly, the present inventors have conducted intensive studies on the above-mentioned drawbacks of the compacted concrete during the hot summer, and as a result, cracks generated during the construction of the compacted concrete in the hot summer show that the hydration reaction is further promoted by the outside air temperature and the concrete becomes hot. It has been found that there is a main cause of temperature cracking due to the occurrence of the crack. Accordingly, an object of the present invention is to provide an additive for compacted concrete capable of suppressing heat generation due to a hydration reaction and improving the strength of concrete. The present invention further has an effect of suppressing hydration heat generation, and at the same time, can prevent a decrease in the filling factor during the casting of hot-rolled concrete pavement in the summer, thereby lowering the strength. The purpose is to provide an additive that can be applied to
［問題点を解決するための手段］ 本発明は、加水分解性タンニン化合物を含有すること
を特徴とする転圧コンクリート用添加剤を提供する。ま
た、その組成割合は、前記加水分解性タンニン化合物
を、１〜99重量％、界面活性剤を、99〜１重量％の割合
で含有するものが好適である。[Means for Solving the Problems] The present invention provides an additive for compacted concrete, comprising a hydrolyzable tannin compound. The composition ratio of the hydrolyzable tannin compound is preferably 1 to 99% by weight, and the surfactant is preferably 99 to 1% by weight.
本発明者らは、転圧コンクリートの暑中の施工で生じ
るひびわれについて、詳細に検討したところ、セメント
の水和が外気温の影響により、更に促進されてコンクリ
ートが高温になることによる温度ひび割れが主な原因で
あることを見出した。実際に、転圧コンクリートの施工
に際して、温度測定したところ、外気温より、最高で20
℃もの温度上昇があり、打設後数日にして、2mm幅のひ
び割れが発生した。The inventors of the present invention have examined in detail the cracks generated during the hot construction of compacted concrete, and found that temperature crazing due to the fact that the hydration of the cement is further promoted by the influence of the outside air temperature and the concrete becomes high in temperature. Was found to be the cause. Actually, when the temperature was measured during the construction of compacted concrete, the maximum
There was a temperature rise of as much as ℃, and cracks of 2 mm width occurred several days after the casting.
本発明は、この知見に基づいてなされた。 The present invention has been made based on this finding.
従来の遅延剤や減水剤は、30℃程度の温度での打設の
場合、例えば、過剰に添加して凝結を遅延させても、そ
の後の水和が急速に起こり、発熱を抑制することができ
ない。（セメント技術年報、41、86〜89（昭和62年）参
照）。In the case of casting at a temperature of about 30 ° C., for example, a conventional retarder or water reducing agent is used, for example, even if it is added excessively to delay the setting, hydration thereafter occurs rapidly, and heat generation can be suppressed. Can not. (See Cement Technology Annual Report, 41 , 86-89 (1987)).
そこで、本発明者らは、水和発熱を抑制し、温度ひび
割れを防ぐために、種々の添加剤を検討した。その結
果、加水分解性タンニン化合物を添加したところ、転圧
コンクリートの施工において、優れた特性が得られるこ
とを見出した。その結果、本発明に至った。Then, the present inventors examined various additives in order to suppress hydration heat generation and prevent temperature cracking. As a result, they found that when a hydrolyzable tannin compound was added, excellent properties were obtained in the construction of compacted concrete. As a result, the present invention has been achieved.
本発明の添加剤に使用する加水分解性タンニン化合物
は、フェノール性カルボン酸と糖がエステル結合した化
合物であり、その代表的な例の構造式を第１図に示す。
即ち、本発明の加水分解性タンニン化合物は、第１図の
構造式で示すガロタンニン（Ｉ）［gallotannin］やコ
リラギン（II）［corilagin］、キブラギン酸（III）
［chebulagic acid］、キブラニン酸（IV）［chebulini
c acid（IV）］などの化合物を主成分とするものであ
り、また、タンニン酸として知られるｍ−ガロイル没食
子酸なども用いることができる。The hydrolyzable tannin compound used in the additive of the present invention is a compound in which a phenolic carboxylic acid and a sugar are ester-bonded, and a structural example of a typical example is shown in FIG.
That is, the hydrolyzable tannin compound of the present invention can be obtained by using gallotannin (I) [gallotannin], corilagin (II) [corilagin], or quibraginic acid (III) represented by the structural formula in FIG.
[Chebulagic acid], quibranic acid (IV) [chebulini
c acid (IV)], and m-galloyl gallic acid known as tannic acid can also be used.
これらの化合物は、加水分解により没食子酸やエラー
グ酸や糖になる。また、これらの物質は、酸性及びアル
カリ性で加水分解を起こし易いことが良く知られてい
る。これらの分解生成物は、セメントに対する水和抑制
効果が著しく大きく、その際に、水和発熱を抑制するこ
とができる。These compounds are converted into gallic acid, ellagic acid and sugar by hydrolysis. It is well known that these substances are acidic and alkaline and easily hydrolyzed. These decomposition products have a remarkably high hydration-inhibiting effect on cement, and in this case, the heat of hydration can be suppressed.
更に、本発明の水和発熱抑制性添加剤は、他の混和剤
即ち、リグニン系、ナフタリンスルホン酸塩ホルマリン
縮合物などの減水剤やリグニン系やオキシカルボン酸塩
系、珪フッ素化物などの従来から良く知られた遅延剤と
併用することもできる。Furthermore, the hydration heat generation-inhibiting additive of the present invention may contain other admixtures, such as lignin-based, naphthalene sulfonate-formalin condensate and other water-reducing agents, and lignin-based, oxycarboxylate-based and silicofluorinated compounds. Can be used in combination with a well-known delaying agent.
また、従来から湿潤剤として使用されているポリオキ
シエチレンアルキルアリルエーテルなどのノニオン系界
面活性剤やアルキル硫酸塩、ジアルキルスルフォ琥珀酸
塩などのアニオン界面活性剤や非起泡性ノニオン界面活
性剤として知られるプロピレングリコールエチレングリ
コールブロックポリマーなどと併用しても良い。In addition, nonionic surfactants such as polyoxyethylene alkyl allyl ether, which has been conventionally used as a wetting agent, anionic surfactants such as alkyl sulfates and dialkyl sulfosuccinates, and non-foaming nonionic surfactants May be used in combination with a propylene glycol-ethylene glycol block polymer known as PEG.
本発明の転圧コンクリート用添加剤を用いることがで
きるセメントとしては、普通、中庸熱、早強、超早強、
耐硫酸塩、白色ポルトランドセメントやシリカセメン
ト、フライアッシュセメント、高炉セメントなどの混合
セメント或いはカルシウムアルミネートを主成分とする
アルミナセメントや、C11A7CaF2を主成分とする超速硬
セメントやカルシウムサルフォアルミネート（C4A3S）
を用いた特殊セメントなどが可能であり、特に、制限さ
れるものではない。As cements that can use the additive for compacted concrete of the present invention, ordinary, moderate heat, early strength, ultra early strength,
Sulfate resistant, white portland cement, silica cement, fly ash cement, and alumina cement consisting mainly of mixed cement or calcium aluminate such as blast furnace cement, ultra rapid cement or calcium as a main component C 11 A 7 CaF 2 monkey follower aluminate (C 4 A 3 S)
It is possible to use a special cement or the like, and there is no particular limitation.
また、本発明の転圧コンクリート用セメント添加剤
は、セメントに対して、0.05重量％〜3.0重量％の割合
で添加するのが好適である。その添加割合は、セメント
の種類によって大きく変わるが、普通ポルトランドセメ
ントでは、セメント量に対して、0.1重量％〜1.0重量％
の範囲が、好適である。Further, the cement additive for compacted concrete of the present invention is preferably added at a ratio of 0.05% by weight to 3.0% by weight based on cement. The addition ratio varies greatly depending on the type of cement, but in ordinary Portland cement, it is 0.1% by weight to 1.0% by weight based on the amount of cement.
Is suitable.
本発明の添加剤は、粉体として前もってセメントと混
合して用いることもできるし、水溶性なので、混練水中
に溶解させて、使用することもできる。The additive of the present invention can be used by mixing it with cement in advance as a powder, or because it is water-soluble, it can be used by dissolving it in kneading water.
本発明の転圧コンクリート用添加剤は、転圧コンクリ
ートの施工での、温度ひび割れ防止特性にすぐれ、且
つ、水和発熱の抑制効果等も有するものである。The additive for compacted concrete of the present invention has excellent temperature crack prevention properties in the construction of compacted concrete and also has an effect of suppressing hydration heat generation.
次に、本発明の転圧コンクリート用添加剤を具体的に
実施例により説明するが、本発明はそれらによって限定
されるものではない。Next, the additive for compacted concrete of the present invention will be specifically described with reference to examples, but the present invention is not limited thereto.
［実施例］ 普通ポルトランドセメントを297kg/m3用いて、水対セ
メントの割合を、36.4重量％にし、s/a（細骨材率：即
ち、砂と粗骨材の全容積中の砂の容積の割合）41.5％に
なるように、水108kg/m3、細骨材875kg/m3、粗骨材1223
kg/m3を混合し、Kp（＝コンクリート1m3中のセメントペ
ースト容積／コンクリート1m3に用いる骨材の空隙容
積）:1.10、Km（＝コンクリート1m3中のセメントペース
ト容積／コンクリート1m3に用いる粗骨材の空隙容積）:
1.75になるように配合し、第１表に示すコンクリート添
加剤を加え、コンクリートを混練した。得られたコンク
リートを、20℃の気温で打ち込み、得られたコンクリー
トについて、振動台式コンシステンシー試験（VC試験）
による締め固め充填率（VC充填率）を測定し、その経時
変化と強度性状を測定した結果を第２表に示す。このVC
充填率は、詰まり易さの指標であり、変化の少ない方が
望ましいものである。[Example] Using 297 kg / m 3 of ordinary Portland cement, the ratio of water to cement was set to 36.4% by weight, and s / a (fine aggregate ratio: that is, the ratio of sand and sand in the total volume of coarse aggregate) so that the percentage) 41.5% of the volume, water 108 kg / m 3, fine aggregates 875kg / m 3, coarse aggregate 1223
mixed kg / m 3, K p ( = void volume of the aggregate used in cement paste volume / concrete 1m 3 in the concrete 1m 3): 1.10, K m (= cement paste volume / concrete 1m in concrete 1m 3 Void volume of coarse aggregate used in 3 ):
The mixture was mixed to 1.75, the concrete additives shown in Table 1 were added, and the concrete was kneaded. The obtained concrete is poured in at a temperature of 20 ° C, and the obtained concrete is subjected to a shaking table type consistency test (VC test).
Table 2 shows the results obtained by measuring the compaction filling ratio (VC filling ratio) according to the above, and measuring the change over time and the strength properties. This VC
The filling rate is an index of the easiness of clogging, and the smaller the change, the better.
以上の第１表、第２表に示される結果から、本発明の
転圧コンクリート用添加剤は、添加により充填率の経時
変化も少なく、コンクリート強度も、７日以降は、比較
例に比べて優れていることが判明した。 From the results shown in Table 1 and Table 2 above, the additive for compacted concrete of the present invention has a small change over time in the filling factor due to the addition, and the concrete strength is also lower than that of the comparative example after 7 days. It turned out to be excellent.
［発明の効果］ 以上説明したように、本発明の転圧コンクリート用添
加剤により、次のような顕著な技術的効果が得られた。[Effects of the Invention] As described above, the following remarkable technical effects were obtained by the additive for compacted concrete of the present invention.
第１に、本発明の添加剤の添加により、打ち込みコン
クリートの充填率の経時変化も少なく、その強度も優れ
たものが得られる。First, by the addition of the additive of the present invention, a change in the filling factor of the poured concrete with time is small, and a material having excellent strength can be obtained.
第２に、本発明の転圧コンクリート用添加剤は、温度
ひび割れを防止し、且つ、水和発熱の抑制効果を有する
ものが提供された。Secondly, the additive for compacted concrete of the present invention is provided which has an effect of preventing temperature cracking and suppressing heat of hydration.
第３に、この結果、転圧コンクリート打ち込みで得ら
れたコンクリート強度が改良されたものが得られた。Third, as a result, a concrete with improved strength obtained by compacting concrete was obtained.
第４に、更に、水和発熱抑制効果を有すると同時に、
転圧コンクリート舗装の暑中打設における充填率の輸送
による低下を防止でき、ひいては、強度低下を起こすこ
とが問題となっている転圧コンクリートへ適用できる添
加剤を提供できる。Fourth, it also has the effect of suppressing hydration heat generation,
The present invention can provide an additive that can be applied to compacted concrete that can cause a reduction in the filling factor due to transportation during hot casting of compacted concrete pavement in the summer, and that causes a decrease in strength.
第１図は、本発明の転圧コンクリート用添加剤に使用す
るタンニン化合物の代表的例の構造式を示す。FIG. 1 shows a structural formula of a typical example of a tannin compound used in the additive for compacted concrete of the present invention.
Claims (2)
を特徴とする転圧コンクリート用添加剤。(1) An additive for compacted concrete, comprising a hydrolyzable tannin compound.
加剤において、前記加水分解性タンニン化合物を、１〜
99重量％、界面活性剤を、99〜１重量％の割合で含有す
ることを特徴とする前記転圧コンクリート用添加剤。2. The additive for compacted concrete according to claim 1, wherein said hydrolyzable tannin compound is 1 to
The above-mentioned additive for compacted concrete, comprising 99% by weight of a surfactant and 99 to 1% by weight of a surfactant.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1278365A JP2571627B2 (en) | 1989-10-27 | 1989-10-27 | Additives for compacted concrete |
| CA 2026868 CA2026868C (en) | 1989-10-27 | 1990-10-03 | Additive for compacted concrete pavement |
| AU63835/90A AU635567B2 (en) | 1989-10-27 | 1990-10-04 | Additives for roller compacted concrete pavement |
| DE19904033823 DE4033823A1 (en) | 1989-10-27 | 1990-10-24 | Additive mixt. for concrete layer - compacted by roller contg. hydrolysable tannin cpd. |
| FR9013177A FR2653794B1 (en) | 1989-10-27 | 1990-10-24 | CONCRETE ADDITIVE FOR FLUSHING COMPACTED BY CYLINDRING. |
| ES9002717A ES2027114A6 (en) | 1989-10-27 | 1990-10-26 | Additive for rolled concrete |
| US07/795,761 US5173117A (en) | 1989-10-27 | 1991-11-21 | Additives for roller compacted concrete pavement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1278365A JP2571627B2 (en) | 1989-10-27 | 1989-10-27 | Additives for compacted concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03141141A JPH03141141A (en) | 1991-06-17 |
| JP2571627B2 true JP2571627B2 (en) | 1997-01-16 |
Family
ID=17596328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1278365A Expired - Fee Related JP2571627B2 (en) | 1989-10-27 | 1989-10-27 | Additives for compacted concrete |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JP2571627B2 (en) |
| AU (1) | AU635567B2 (en) |
| CA (1) | CA2026868C (en) |
| DE (1) | DE4033823A1 (en) |
| ES (1) | ES2027114A6 (en) |
| FR (1) | FR2653794B1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2925484A1 (en) * | 2007-12-21 | 2009-06-26 | Lafarge Sa | Use of at least one 3,4,5-trihydroxy-benzoic acid methyl ester compounds as an additive for hydraulic binder, mortar or concrete, where the hydraulic binder is useful e.g. for the fabrication of elements or materials in construction |
| JP5578437B2 (en) * | 2011-01-20 | 2014-08-27 | 住友大阪セメント株式会社 | Cement composition |
| WO2019151957A1 (en) * | 2018-01-30 | 2019-08-08 | Scg Cement-Building Materials Co., Ltd. | A formula of powder materials for machines used in forming construction, structural, and the powder materials thereof |
| US20230294012A1 (en) * | 2021-02-19 | 2023-09-21 | Anhui Jinhe Industrial Co., Ltd. | Production apparatus and production method of sucrose-6-ester |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2115751A5 (en) * | 1970-11-26 | 1972-07-07 | Progil | Retardation of cement setting times - by addition of polyphenols |
| US4391645A (en) * | 1982-04-12 | 1983-07-05 | Diamond Shamrock Corporation | Additives for cementitious materials |
| JP2647831B2 (en) * | 1986-07-09 | 1997-08-27 | 花王株式会社 | Bituminous emulsion |
-
1989
- 1989-10-27 JP JP1278365A patent/JP2571627B2/en not_active Expired - Fee Related
-
1990
- 1990-10-03 CA CA 2026868 patent/CA2026868C/en not_active Expired - Fee Related
- 1990-10-04 AU AU63835/90A patent/AU635567B2/en not_active Ceased
- 1990-10-24 DE DE19904033823 patent/DE4033823A1/en not_active Withdrawn
- 1990-10-24 FR FR9013177A patent/FR2653794B1/en not_active Expired - Fee Related
- 1990-10-26 ES ES9002717A patent/ES2027114A6/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03141141A (en) | 1991-06-17 |
| AU6383590A (en) | 1991-05-02 |
| DE4033823A1 (en) | 1991-05-02 |
| AU635567B2 (en) | 1993-03-25 |
| FR2653794A1 (en) | 1991-05-03 |
| ES2027114A6 (en) | 1992-05-16 |
| FR2653794B1 (en) | 1996-02-23 |
| CA2026868C (en) | 1996-04-30 |
| CA2026868A1 (en) | 1991-04-28 |
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