JP2001026474A - High strength concrete - Google Patents
High strength concreteInfo
- Publication number
- JP2001026474A JP2001026474A JP19971899A JP19971899A JP2001026474A JP 2001026474 A JP2001026474 A JP 2001026474A JP 19971899 A JP19971899 A JP 19971899A JP 19971899 A JP19971899 A JP 19971899A JP 2001026474 A JP2001026474 A JP 2001026474A
- Authority
- JP
- Japan
- Prior art keywords
- cement
- reducing agent
- ratio
- water
- high performance
- 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
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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]
【発明の属する技術分野】本発明は、圧縮強度が60N/mm
2以上である高強度コンクリートに関し、特に脆度係数
（圧縮強度／引張強度）が小さい高強度コンクリートに
関する。TECHNICAL FIELD The present invention relates to a compression strength of 60 N / mm.
The present invention relates to high-strength concrete having a strength of 2 or more, and particularly to high-strength concrete having a small brittleness coefficient (compression strength / tensile strength).
【０００２】[0002]
【従来の技術】近年、土地のより一層の有効利用の観点
から、建築物の超高層化及び大規模化の傾向は益々顕著
になってきている。このような超高層ないしは大規模な
建築物を実現するために、従来より、60N/mm2以上の圧
縮強度を発現するような高強度コンクリートの開発が行
われている。2. Description of the Related Art In recent years, from the viewpoint of more effective use of land, the tendency of buildings to be super-high-rise and large-scale has been increasingly remarkable. In order to realize such a super-high-rise building or a large-scale building, high-strength concrete that has a compressive strength of 60 N / mm 2 or more has been conventionally developed.
【０００３】[0003]
【発明が解決しようとする課題】従来、高強度コンクリ
ートでは、普通ポルトランドセメントを使用して単位セ
メント量を増大（例えば、500kg/m3以上）し、高性能減
水剤又は高性能ＡＥ減水剤を使用して、水／セメント比
を減少する（例えば、40重量％以下）ことで、60N/mm2
以上の圧縮強度を発現させている。しかしながら、この
ようにして調製した高強度コンクリートでは、脆度係数
（圧縮強度／引張強度）が大きくなるという課題があっ
た。Conventionally, in the case of high-strength concrete, the unit cement amount is increased (for example, 500 kg / m 3 or more) using ordinary Portland cement, and a high-performance water reducing agent or a high-performance AE water reducing agent is used. Use to reduce the water / cement ratio (eg, up to 40% by weight) to provide 60N / mm 2
The above compressive strength is developed. However, the high-strength concrete thus prepared has a problem that the brittleness coefficient (compression strength / tensile strength) increases.
【０００４】[0004]
【課題を解決するための手段】本発明者等は、前記課題
を解決するために鋭意研究した結果、特定の材料を添加
することによって、圧縮強度が60N/mm2以上の高強度コ
ンクリートであっても、脆度係数（圧縮強度／引張強
度）を小さくできるという知見を得て、本発明を完成さ
せたものである。Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, by adding a specific material, a high-strength concrete having a compressive strength of 60 N / mm 2 or more was obtained. However, the present inventors have found that the brittleness coefficient (compression strength / tensile strength) can be reduced, and completed the present invention.
【０００５】即ち、本発明は、セメント、高性能減水剤
又は高性能ＡＥ減水剤、細骨材、粗骨材、収縮低減剤及
び／又は膨張材を含有してなり、水／セメント比が40重
量％以下で、圧縮強度が60N/mm2以上である高強度コン
クリート（請求項１）である。さらに本発明は、収縮低
減剤／セメント比が0.5〜2.0重量％及び／又は膨張材／
セメント比が１〜10重量％である請求項１記載の高強度
コンクリート（請求項２）である。That is, the present invention comprises cement, a high performance water reducing agent or a high performance AE water reducing agent, fine aggregate, coarse aggregate, shrinkage reducing agent and / or expansive material, and has a water / cement ratio of 40. It is a high-strength concrete having a compressive strength of 60 N / mm 2 or more at a weight percent or less (Claim 1). Further, the present invention provides a shrinkage reducing agent / cement ratio of 0.5 to 2.0% by weight and / or an expanding material /
2. The high-strength concrete according to claim 1, wherein the cement ratio is 1 to 10% by weight.
【０００６】[0006]
【発明の実施の形態】以下、本発明について詳細に説明
する。本発明の高強度コンクリートは、セメント、高性
能減水剤又は高性能ＡＥ減水剤、細骨材、粗骨材、収縮
低減剤及び／又は膨張材を含有してなり、水／セメント
比が40重量％以下で、圧縮強度が60N/mm2以上のもので
ある。圧縮強度が60N/mm2以上の高強度コンクリートに
おいては、セメント等の粉体量が多くなり、該コンクリ
ートの作業性を確保するためにある程度多量の水量が必
要となる。そのため、コンクリート中のペースト部の硬
化収縮が大きくなり、骨材拘束によってコンクリートに
蓄積される引張の応力（蓄積応力）が大きくなることが
考えられる。本発明においては、収縮低減剤及び／又は
膨張材を使用することによって、この蓄積応力が低減し
て、脆度係数が小さくなるものと推察される。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. The high-strength concrete of the present invention contains cement, a high-performance water reducing agent or a high-performance AE water reducing agent, fine aggregate, coarse aggregate, shrinkage reducing agent and / or expansive material, and has a water / cement ratio of 40% by weight. % Or less and a compressive strength of 60 N / mm 2 or more. In the case of high-strength concrete having a compressive strength of 60 N / mm 2 or more, the amount of powder of cement or the like increases, and a certain amount of water is required to ensure the workability of the concrete. Therefore, it is conceivable that the curing shrinkage of the paste portion in the concrete increases, and the tensile stress (accumulated stress) accumulated in the concrete due to the aggregate constraint increases. In the present invention, it is presumed that the use of the shrinkage reducing agent and / or the expanding material reduces the accumulated stress and reduces the brittleness coefficient.
【０００７】本発明の高強度コンクリートにおいては、
セメントとしては、普通・早強・中庸熱ポルトランドセ
メント等の各種ポルトランドセメント、高炉セメント・
フライアッシュセメント等の各種混合セメントや、都市
ゴミ焼却灰・下水汚泥焼却灰等の廃棄物を原料として利
用したセメント（エコセメント）、さらには前記ポルト
ランドセメントやエコセメントの一部を石灰石粉末、シ
リカヒューム、メタカオリン等の混和材で置換したセメ
ントが挙げられる。細骨材としては、川砂、陸砂、海
砂、砕砂及びこれらの混合物を使用することができる。
粗骨材としては、川砂利、山砂利、海砂利、砕石及びこ
れらの混合物を使用することができる。高性能減水剤又
は高性能ＡＥ減水剤としては、リグニン系、ナフタレン
スルホン酸系、メラミン系、ポリカルボン酸系の高性能
減水剤又は高性能ＡＥ減水剤を使用することができる。In the high-strength concrete of the present invention,
Various types of Portland cement, such as ordinary / early high strength / moderate heat Portland cement, blast furnace cement, etc.
Various mixed cements such as fly ash cement and cement (eco-cement) using waste such as municipal waste incineration ash and sewage sludge incineration ash as a raw material. Examples include cements substituted with admixtures such as fume and metakaolin. As fine aggregate, river sand, land sand, sea sand, crushed sand, and a mixture thereof can be used.
As the coarse aggregate, river gravel, mountain gravel, sea gravel, crushed stone, and a mixture thereof can be used. As the high-performance water reducing agent or the high-performance AE water reducing agent, a lignin-based, naphthalenesulfonic acid-based, melamine-based, polycarboxylic acid-based high-performance water reducing agent or a high-performance AE water reducing agent can be used.
【０００８】本発明の高強度コンクリートにおいては、
水／セメント比は40重量％以下が好ましく、20〜35重量
％がより好ましい。水／セメント比が40重量％を超える
と、60N/mm2以上の圧縮強度を発現させることが困難と
なり、高強度コンクリートを提供するという本願発明の
目的には沿わなくなる。水／セメント比が20重量％未満
では、コンクリートの作業性が急激に悪化し、取り扱い
にくいコンクリートとなり好ましくない。なお、本発明
においては、単位セメント量は500〜700kg/m3とするこ
とが好ましい。単位セメント量が500kg/m3未満では、60
N/mm2以上の圧縮強度を発現させることが困難となり、
高強度コンクリートを提供するという本願発明の目的に
は沿わなくなる。単位セメント量が700kg/m3を超えると
コンクリートの粘性が高くなり作業性が低下する。ま
た、温度ひび割れが生じやすくなり好ましくない。ま
た、高性能減水剤又は高性能ＡＥ減水剤の使用量は、高
性能減水剤又は高性能ＡＥ減水剤／セメント比で0.5〜
3.0重量％とすることが好ましく、0.7〜2.0重量％とす
ることがより好ましい。高性能減水剤又は高性能ＡＥ減
水剤／セメント比が0.5重量％未満では、水／セメント
比40重量％以下で作業性の良好なコンクリートが得られ
難い。高性能減水剤又は高性能ＡＥ減水剤／セメント比
が3.0重量％を超えても、その効果は事質上、頭打ちと
なりコストの点から好ましくない。また、コンクリート
の作業性等から、本発明においては、細骨材率は46〜55
％とすることが好ましく、47〜53％がより好ましい。[0008] In the high-strength concrete of the present invention,
The water / cement ratio is preferably 40% by weight or less, more preferably 20 to 35% by weight. If the water / cement ratio exceeds 40% by weight, it is difficult to develop a compressive strength of 60 N / mm 2 or more, and this does not meet the object of the present invention to provide high-strength concrete. If the water / cement ratio is less than 20% by weight, the workability of the concrete rapidly deteriorates, and the concrete becomes difficult to handle, which is not preferable. In the present invention, the unit cement amount is preferably set to 500~700kg / m 3. The unit amount cement is less than 500kg / m 3, 60
It is difficult to develop a compressive strength of N / mm 2 or more,
The object of the present invention to provide high-strength concrete is not met. When the unit cement amount exceeds 700 kg / m 3 , the viscosity of the concrete increases and the workability decreases. In addition, temperature cracks tend to occur, which is not preferable. The amount of the high-performance water reducing agent or the high-performance AE water reducing agent is 0.5 to 0.5 in the ratio of the high-performance water reducing agent or the high-performance AE water reducing agent / cement.
The content is preferably 3.0% by weight, more preferably 0.7 to 2.0% by weight. If the ratio of the high-performance water reducing agent or the high-performance AE water reducing agent / cement is less than 0.5% by weight, it is difficult to obtain concrete with good workability at a water / cement ratio of 40% by weight or less. Even if the ratio of the high-performance water reducing agent or the high-performance AE water reducing agent / cement exceeds 3.0% by weight, the effect is limited in nature and is not preferable in terms of cost. Further, from the viewpoint of workability of concrete, etc., in the present invention, the fine aggregate ratio is 46 to 55.
%, More preferably 47 to 53%.
【０００９】本発明の高強度コンクリートにおいて、収
縮低減剤は、水に溶解してその表面張力を低下する作用
を持つものであり、化学式；ＲＯ（ＡＯ）nＨで示され
る低級アルコールのアルキレンオキサイド付加物が好ま
しい。ここで、式中のＲは、炭素数４〜６のアルキル基
である。このような基としては、ｎ−ブチル基、ｉｓｏ
−ブチル基、ｔｅｒｔ−ブチル基、ｎ−ペンチル基、ｉ
ｓｏ−ペンチル基、ｔｅｒｔ−ペンチル基等が挙げられ
る。また、式中のＡは、炭素数２〜３の１種又は２種の
アルキレン基であり、エチレン基及び／又はプロピレン
基が挙げられる。さらに、式中のｎは、１〜１０の整数
である。ＲＯ（ＡＯ）nＨで示される低級アルコールの
アルキレンオキサイド付加物の中でも好ましいものは、
ｎ−ブチルアルコールのプロピレンオキサイド（付加モ
ル数２）／エチレンオキサイド（付加モル数３）であ
り、市販品としては、太平洋セメント株式会社製「AS2
1」が挙げられる。収縮低減剤は混練水の一部と置換え
て使用することが好ましい。収縮低減剤の使用量は、収
縮低減剤／セメント比で0.5〜2.0重量％が好ましく、0.
7〜2.0重量％がより好ましい。収縮低減剤／セメント比
が0.5重量％未満では脆度係数が大きくなり好ましくな
い。収縮低減剤／セメント比が2.0重量％を超えると凝
結遅延が生じ、またコストも高くなるので好ましくな
い。In the high-strength concrete of the present invention, the shrinkage reducing agent has a function of dissolving in water to lower the surface tension thereof, and the addition of a lower alcohol represented by the chemical formula: RO (AO) nH to an alkylene oxide. Are preferred. Here, R in the formula is an alkyl group having 4 to 6 carbon atoms. Such groups include n-butyl, iso
-Butyl group, tert-butyl group, n-pentyl group, i
and a so-pentyl group and a tert-pentyl group. A in the formula is one or two alkylene groups having 2 to 3 carbon atoms, such as an ethylene group and / or a propylene group. Further, n in the formula is an integer of 1 to 10. Among the alkylene oxide adducts of lower alcohols represented by RO (AO) nH, preferred are:
Propylene oxide of n-butyl alcohol (additional mole number 2) / ethylene oxide (additional mole number 3). As a commercial product, "AS2" manufactured by Taiheiyo Cement Co., Ltd.
1 ". It is preferable to use the shrinkage reducing agent after replacing a part of the kneading water. The amount of the shrinkage reducing agent used is preferably 0.5 to 2.0% by weight in terms of the shrinkage reducing agent / cement ratio,
7 to 2.0% by weight is more preferred. If the shrinkage reducing agent / cement ratio is less than 0.5% by weight, the brittleness coefficient increases, which is not preferable. If the shrinkage reducing agent / cement ratio exceeds 2.0% by weight, setting delay is caused and the cost is undesirably increased.
【００１０】膨張材としては、カルシウムサルホアルミ
ネート系膨張材や石灰系膨張材等が挙げられ、マスコン
用水和熱抑制タイプや通常タイプのいずれも使用するこ
とができる。膨張材の粒度は限定するものではないが、
ブレーン比表面積2000〜6000cm2/g程度が好ましい。膨
張材の使用量は、膨張材／セメント比で１〜10重量％が
好ましく、２〜８重量％がより好ましい。膨張材／セメ
ント比が１重量％未満では脆度係数が大きくなり好まし
くない。膨張材／セメント比が10重量％を超えると膨張
量が大きすぎて強度が低下する場合があり、60N/mm2以
上の圧縮強度を発現させる高強度コンクリートを提供す
るという本願発明の目的には沿わなくなる場合がある。Examples of the expansive material include a calcium sulfoaluminate-based expansive material and a lime-based expansive material, and any of a heat-inhibiting type for mascon and a normal type can be used. The particle size of the expanding material is not limited,
The specific surface area of the brane is preferably about 2000 to 6000 cm 2 / g. The amount of the expanding material used is preferably 1 to 10% by weight, more preferably 2 to 8% by weight in the expanding material / cement ratio. If the expansive material / cement ratio is less than 1% by weight, the brittleness coefficient increases, which is not preferable. If the expansive material / cement ratio exceeds 10% by weight, the expansion may be too large and the strength may decrease, and the object of the present invention to provide a high-strength concrete exhibiting a compressive strength of 60 N / mm 2 or more is May not be along.
【００１１】本発明においては、収縮低減剤と膨張材を
併用することは差し支えない。この場合の収縮低減剤及
び膨張材の使用量は、それぞれ前述の範囲の使用量とす
るのが好ましい。In the present invention, it is possible to use a shrinkage reducing agent and an expanding material together. In this case, the amount of the shrinkage reducing agent and the amount of the expanding material are preferably used within the above-mentioned ranges.
【００１２】本発明の高強度コンクリートの混練方法や
混練装置は、特に限定するものではなく、慣用の方法
で、慣用のミキサーで混練すれば良い。また、養生方法
も特に限定するものではなく、慣用の方法で養生すれば
良い。なお、本発明においては、必要に応じて、支障の
ない範囲内で、ＡＥ剤、消泡剤等の従来より使用されて
いるコンクリート混和剤を添加することができる。The method and apparatus for kneading high-strength concrete of the present invention are not particularly limited, and they may be kneaded by a conventional method and a conventional mixer. Also, the curing method is not particularly limited, and the curing may be performed by a conventional method. In the present invention, a conventionally used concrete admixture, such as an AE agent or an antifoaming agent, can be added as needed within a range that does not cause any trouble.
【００１３】以下、試験例により本発明を説明する。 １．使用材料 以下に示す材料を使用した。 １）セメント；太平洋セメント（株）製普通ポルトラン
ドセメントを使用した。 ２）高性能ＡＥ減水剤；太平洋セメント（株）製「コア
フローCP-300」を使用した。 ３）細骨材；静岡県産陸砂（表乾比重:2.60）を使用し
た。 ４）粗骨材；茨城県産砕石（表乾比重:2.64）を使用し
た。 ５）膨張材；太平洋セメント（株）製「アサノジプカ
ル」を使用した。 ６）収縮低減剤；太平洋セメント（株）製「AS21」を使
用した。 ７）水；水道水を使用した。Hereinafter, the present invention will be described with reference to test examples. 1. Materials used The following materials were used. 1) Cement; ordinary Portland cement manufactured by Taiheiyo Cement Co., Ltd. was used. 2) High performance AE water reducing agent; "Core Flow CP-300" manufactured by Taiheiyo Cement Co., Ltd. was used. 3) Fine aggregate: Land sand from Shizuoka Prefecture (surface dry specific gravity: 2.60) was used. 4) Coarse aggregate; crushed stone from Ibaraki Prefecture (specific gravity of surface dryness: 2.64) was used. 5) Expansive material: "Asano dipcal" manufactured by Taiheiyo Cement Corp. was used. 6) Shrinkage reducing agent: "AS21" manufactured by Taiheiyo Cement Co., Ltd. was used. 7) Water: Tap water was used.
【００１４】２．コンクリートの配合及び混練 前記材料を使用し、表１に示す配合にしたがってコンク
リートを調製した。混練は、二軸強制練りミキサー（0.
06m3）を用いて、180秒間混練した。2. Mixing and kneading of concrete Concrete was prepared according to the mixing shown in Table 1 using the above materials. The kneading is performed by a twin-screw kneading mixer (0.
06m 3 ), and kneaded for 180 seconds.
【００１５】[0015]
【表１】 [Table 1]
【００１６】３．評価 上記各コンクリートをφ10×20cmの型枠及びφ15×30cm
の型枠を用いて成形した。成形後、１日間型枠内で養生
し、脱型した。その後、所定の材令（７、28日）まで水
中養生し、「JIS A 1108（コンクリートの圧縮強度試験
方法）」に準じて圧縮強度（φ10×20cmの供試体使用）
を、「JIS A 1113（コンクリートの割裂引張強度試験方
法）」に準じて引張強度（φ15×30cmの供試体使用）を
測定し、脆度係数（圧縮強度／引張強度）を算出した。
その結果を表２に示す。3. Evaluation Each of the above concrete was made of φ10 × 20cm formwork and φ15 × 30cm
Was molded using the above mold. After molding, it was cured in a mold for one day and was demolded. After that, it is cured in water until the specified material age (7 and 28 days), and the compressive strength (use of φ10 × 20cm specimen) according to “JIS A 1108 (Test method for compressive strength of concrete)”
Was measured for tensile strength (using a specimen of φ15 × 30 cm) in accordance with “JIS A 1113 (Test method for splitting tensile strength of concrete)”, and the brittleness coefficient (compression strength / tensile strength) was calculated.
Table 2 shows the results.
【００１７】[0017]
【表２】 [Table 2]
【００１８】表２から明らかなように、収縮低減剤及び
／又は膨張材を含有する本発明の高強度コンクリート
（試験例１〜３）では、圧縮強度が73〜85N/mm2であっ
ても、脆度係数は小さかった。一方、収縮低減剤及び／
又は膨張材を含有しない試験例４のコンクリートでは、
脆度係数が大きかった。As is apparent from Table 2, in the high-strength concrete of the present invention (Test Examples 1 to 3) containing a shrinkage reducing agent and / or an expanding material, even if the compressive strength is 73 to 85 N / mm 2. The brittleness coefficient was small. On the other hand, a shrinkage reducing agent and / or
Or, in the concrete of Test Example 4 containing no expanding material,
The brittleness coefficient was large.
【００１９】[0019]
【発明の効果】以上説明したように、本発明の高強度コ
ンクリートでは、圧縮強度が60N/mm2以上であっても、
脆度係数は小さいものである。As described above, in the high-strength concrete of the present invention, even if the compressive strength is 60 N / mm 2 or more,
The brittleness coefficient is small.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０４Ｂ 103:32 103:60 111:34 (72)発明者 下山 善秀 千葉県佐倉市大作２−４−２ 太平洋セメ ント株式会社佐倉研究所内 Ｆターム(参考） 4G012 PA04 PB12 PB15 PB23 PB24 PB32 PB35 PC02 PC03 PC09 PC12 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C04B 103: 32 103: 60 111: 34 (72) Inventor Yoshihide Shimoyama 2-4-2 Daisaku, Sakura City, Chiba Prefecture 2 Taiheiyo Cement Co., Ltd. Sakura Laboratory F-term (reference) 4G012 PA04 PB12 PB15 PB23 PB24 PB32 PB35 PC02 PC03 PC09 PC12
Claims (2)
減水剤、細骨材、粗骨材、収縮低減剤及び／又は膨張材
を含有してなり、水／セメント比が40重量％以下で、圧
縮強度が60N/mm2以上であることを特徴とする高強度コ
ンクリート。Cement, high performance water reducing agent or high performance AE
It contains a water reducing agent, fine aggregate, coarse aggregate, shrinkage reducing agent and / or expansive material, and has a water / cement ratio of 40% by weight or less and a compressive strength of 60N / mm 2 or more. To high strength concrete.
％及び／又は膨張材／セメント比が１〜10重量％である
ことを特徴とする請求項１記載の高強度コンクリート。2. The high-strength concrete according to claim 1, wherein the shrinkage reducing agent / cement ratio is 0.5 to 2.0% by weight and / or the expander / cement ratio is 1 to 10% by weight.
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| JP19971899A JP2001026474A (en) | 1999-07-14 | 1999-07-14 | High strength concrete |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19971899A JP2001026474A (en) | 1999-07-14 | 1999-07-14 | High strength concrete |
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| Publication Number | Publication Date |
|---|---|
| JP2001026474A true JP2001026474A (en) | 2001-01-30 |
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ID=16412467
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| JP19971899A Pending JP2001026474A (en) | 1999-07-14 | 1999-07-14 | High strength concrete |
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| Country | Link |
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| JP (1) | JP2001026474A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010062155A1 (en) * | 2008-11-28 | 2010-06-03 | Arturo Solis Herrera | Cement mixture with significantly improved physico-chemical and bacteriological properties that contains dopamelanin, precursors thereof, analogues thereof or derivatives thereof, as an additive |
| CN106478031A (en) * | 2016-10-24 | 2017-03-08 | 韩祖丽 | GHPC water-permeable brick and preparation method thereof |
| CN108911621A (en) * | 2018-06-28 | 2018-11-30 | 来安县塔鑫建材有限公司 | A kind of good concrete of bank slope protection durability |
-
1999
- 1999-07-14 JP JP19971899A patent/JP2001026474A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010062155A1 (en) * | 2008-11-28 | 2010-06-03 | Arturo Solis Herrera | Cement mixture with significantly improved physico-chemical and bacteriological properties that contains dopamelanin, precursors thereof, analogues thereof or derivatives thereof, as an additive |
| US8691891B2 (en) | 2008-11-28 | 2014-04-08 | Arturo Solis Herrera | Cement mixture with significantly improved physicochemical and bacteriological properties that contains dopamelanin, precursors thereof, analogues thereof or derivatives thereof, as an additive |
| EA021885B1 (en) * | 2008-11-28 | 2015-09-30 | Артуро Солис Эррера | Cement mixture with significantly improved physico-chemical and bacteriological properties that contains dopa-melanin as an additive |
| CN106478031A (en) * | 2016-10-24 | 2017-03-08 | 韩祖丽 | GHPC water-permeable brick and preparation method thereof |
| CN108911621A (en) * | 2018-06-28 | 2018-11-30 | 来安县塔鑫建材有限公司 | A kind of good concrete of bank slope protection durability |
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