JPH04124054A - Superhigh-strength concrete - Google Patents
Superhigh-strength concreteInfo
- Publication number
- JPH04124054A JPH04124054A JP2242868A JP24286890A JPH04124054A JP H04124054 A JPH04124054 A JP H04124054A JP 2242868 A JP2242868 A JP 2242868A JP 24286890 A JP24286890 A JP 24286890A JP H04124054 A JPH04124054 A JP H04124054A
- Authority
- JP
- Japan
- Prior art keywords
- binder
- amount
- water
- concrete
- superhigh
- 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
- 239000004567 concrete Substances 0.000 title abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000011230 binding agent Substances 0.000 claims abstract description 25
- 239000000843 powder Substances 0.000 claims abstract description 20
- 239000002893 slag Substances 0.000 claims abstract description 19
- 239000010881 fly ash Substances 0.000 claims abstract description 18
- 229910021487 silica fume Inorganic materials 0.000 claims abstract description 16
- 239000004575 stone Substances 0.000 claims abstract description 12
- 239000011398 Portland cement Substances 0.000 claims abstract description 7
- 239000011372 high-strength concrete Substances 0.000 claims description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 17
- 239000003638 chemical reducing agent Substances 0.000 abstract description 15
- 239000004568 cement Substances 0.000 abstract description 13
- 230000036571 hydration Effects 0.000 abstract description 9
- 238000006703 hydration reaction Methods 0.000 abstract description 9
- 239000004576 sand Substances 0.000 abstract description 7
- 238000005336 cracking Methods 0.000 abstract description 5
- 238000002156 mixing Methods 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 15
- 239000002245 particle Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 239000000377 silicon dioxide Substances 0.000 description 5
- 238000004898 kneading Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- WURBVZBTWMNKQT-UHFFFAOYSA-N 1-(4-chlorophenoxy)-3,3-dimethyl-1-(1,2,4-triazol-1-yl)butan-2-one Chemical compound C1=NC=NN1C(C(=O)C(C)(C)C)OC1=CC=C(Cl)C=C1 WURBVZBTWMNKQT-UHFFFAOYSA-N 0.000 description 2
- 210000004556 brain Anatomy 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- -1 As a result Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000008030 superplasticizer Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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、超高強度コンクリートに関し、詳しくは４５
Ｃ１以上のスランプフロー値を示す良好なワーカビリチ
ーを有し、かつ水和熱発生量が少なくて、９００ ｋｇ
ｒ／ｃｍ２以上の２８日圧縮強度を有する超高強度コン
クリートに関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to ultra-high strength concrete, and in detail,
It has good workability with a slump flow value of C1 or higher, generates little heat of hydration, and weighs 900 kg.
The present invention relates to ultra-high strength concrete having a 28-day compressive strength of r/cm2 or more.
近年ではコンクリート構造物が次第に高層化するにした
がって、そのコンクリート構造物の構造材料として用い
られる高強度コンクリートに対して、益々高度な性能が
要求されるようになってきており、その研究開発が活発
に進められている。In recent years, as concrete structures have become increasingly high-rise, the high-strength concrete used as the structural material for these concrete structures has come to be required to have increasingly advanced performance, and research and development in this field has been active. is being advanced.
一般に、コンクリート調合物は、セメント、粗骨材、細
骨材、コンクリート用混和剤、水等の多くの構成材料か
らなり、そしてこれらの各材料の性状、品質、使用量ま
たは組合せ等により、得られるコンクリートの品質は大
きく変化するので、目的とするコンクリートの性能を確
保するため、従来から、例えば上記材料の種類、粒度、
組合せまたは配合比等に種々の検討が加えられており、
特に超高強度コンクリートを得るためには、すなわちコ
ンクリートに超高強度を付与するためには、このコンク
リートにおいて、■単位セメント量を多くする、■水セ
メント比を３０％以下にすると共に、流動性を付与する
ために高性能減水剤を添加する、■シリカフュウムを添
加する、あるいは■粗骨材として川砂利を用いる
等の手段が提案されている。In general, concrete mixtures consist of many constituent materials such as cement, coarse aggregate, fine aggregate, concrete admixtures, and water, and the benefits vary depending on the properties, quality, amount used, or combination of each of these materials. The quality of the concrete produced varies greatly, so in order to ensure the desired concrete performance, conventional methods have been used, such as the type of material, particle size,
Various studies have been conducted on combinations and blending ratios, etc.
In particular, in order to obtain ultra-high strength concrete, that is, to impart ultra-high strength to concrete, in this concrete, it is necessary to: ■ increase the amount of cement per unit, ■ reduce the water-cement ratio to 30% or less, and improve fluidity. In order to provide this, methods such as adding a high performance water reducing agent, (2) adding silica fume, or (2) using river gravel as coarse aggregate have been proposed.
上記のように、超高強度コンクリートを得るために、既
に多くの工夫が試みられているが、従来の方法では実用
化段階において種々の問題が指摘されている。すなわち
、従来の超高強度コンクリートでは、
■現場打設に必要なワーカビリチーが不十分であり、ポ
ンプ圧送性に難点があること、■コンクリートに超高強
度を付与するために単位セメント量を多くすると、水和
熱による温度ひび割れが生しること、■シリカフニーム
および高性能減水剤は高価であるため、これらの材料を
多量に使用すると材料コストが嵩むこと、および■近年
では川砂利の入手が困難になっていること、
等の多くの問題があり、これらの問題は現在必ずしも解
決されていない。As mentioned above, many attempts have already been made to obtain ultra-high strength concrete, but various problems have been pointed out in the conventional methods at the stage of practical use. In other words, with conventional ultra-high strength concrete, the workability required for on-site pouring is insufficient, and pumpability is difficult; , Temperature cracks occur due to the heat of hydration, silica hneem and high-performance water reducing agents are expensive, so using large amounts of these materials increases material costs, and , river gravel is difficult to obtain in recent years. There are many problems such as , and these problems are not necessarily resolved at present.
（研究に基づく知見事項〕
そこで、本発明者は、上記問題を解決するために種々研
究を重ねた結果、
■従来超高強度コンクリートを製造する場合に配合され
るシリカフュウムの一部を、平均粒径が１５ミクロン前
後のセメントと平均粒径が０．１ミクロン前後のシリカ
フュウムとの中間的な粒径に対応する５０００〜１ｏｏ
ｏｏｃｄ／ｇのブレーン比表面積を有するスラグ微粉末
及び／又は分級フライアッシュで置き換えると、十分な
超高強度を保持しながら、必要なシリカフュウムの量を
減少できるばかりでなく、シリカフュウムの量がセメン
トの１０％以下でもワーカビリチーのよい超高強度コン
クリートが得られ、さらに、このようなスラグ微粉末及
び／又は分級フライアッシュの添加により単位結合材量
を４５０〜５５０１ｃｇ／ｎ（に減らしても９００ｋｇ
ｆ／ｃｔ［を以上の超高強度を確保できること、
■ 上記のような単位結合材量、したがってセメント量
の減少は、セメントの水和生成物である水酸化カルシウ
ムの析出量の減少をもたらし、その結果、この水酸化カ
ルシウムと反応して、水酸化カルシウムよりも接着力の
大きい珪酸カルシウムを骨材表面とトランジションゾー
ンとの間に生成して、コンクリートの強度増進に寄与す
るために加えるシリカフユムの配合量、すなわち珪酸カ
ルシウム形成に必要なシリカフュウムの量を減らずこと
ができること、
■ 上記のようなシリカフュウム量の減少により、必要
な高性能減水剤の量も減少できること、■ スラグ微粉
末及び／又は分級フライアッシュを添加してセメント量
が減少することによって、水和熱の発生量が抑制され、
施工後のひび割れが回避されること、
■ 上記のようなスラグ微粉末及び／又は分級フライア
ッシュをコンクリート・に配合することによって、従来
の川砂利の代わりに、一般に使用されている砕石を粗骨
材として使用しても、優れたワーカビリチーと超高強度
が確保できること、および
■ 前記スラグ微粉末及び／又は分級フライアッシュを
使用した場合には、水結合材比が３０％以下でも現場打
設に必要な十分なワーカビリチーを確保できること、
を見出した。(Findings based on research) Therefore, as a result of various studies in order to solve the above problems, the inventor of the present invention has found that: 5000 to 1oo, which corresponds to an intermediate particle size between cement, which has a diameter of around 15 microns, and silica fume, which has an average particle diameter of around 0.1 micron.
Replacing slag fine powder and/or classified fly ash with a Blaine specific surface area of Even if it is less than 10%, ultra-high strength concrete with good workability can be obtained, and by adding such fine slag powder and/or classified fly ash, even if the unit binder amount is reduced to 450 to 5501 cg/n (900 kg).
It is possible to secure an ultra-high strength of f/ct [ or more. ■ The above-mentioned reduction in the amount of unit binder, and therefore the amount of cement, results in a reduction in the amount of precipitated calcium hydroxide, which is a hydration product of cement, As a result, silica fuyum, which is added to react with this calcium hydroxide and generate calcium silicate, which has stronger adhesive strength than calcium hydroxide, between the aggregate surface and the transition zone and contributes to increasing the strength of concrete. The amount of silica fume required to form calcium silicate can be reduced without reducing the amount of silica fume, ■ The amount of high performance water reducing agent required can be reduced by reducing the amount of silica fume as described above, ■ Fine slag powder and/or By adding classified fly ash and reducing the amount of cement, the amount of heat of hydration generated is suppressed.
Cracks after construction are avoided; ■ By blending fine slag powder and/or classified fly ash as described above into concrete, commonly used crushed stone can be used instead of conventional river gravel. Excellent workability and ultra-high strength can be ensured even when used as a material, and ■ When the above-mentioned fine slag powder and/or classified fly ash is used, it can be cast on-site even if the water-binding material ratio is 30% or less. We have found that it is possible to secure the necessary sufficient workability.
本発明は、上記知見に基づいて発明されたもので、シリ
カフュウムの配合量を極力少なくしても、かつまた単位
結合材量を少なくしても十分な強度を発揮し、しかも粗
骨材として砕石を使用しても優れたワーカビリチーを示
しで、実際に実用化に通した超高強度コンクリートを提
供することを目的とし、
普通ポルトランドセメント、ブレーン比表面積が５００
０〜１ｏ０００ｃ祷／ｇであるスラグ微粉末及び／又は
分級フライアッシュおよびシリカフュウムからなる結合
材、粗骨材、細骨材および水を含み、そして前記結合材
の単位置が４５０〜５５０ｋｇ／ｍであり、かつ水結合
材比が３０％以下であることを特徴とする、超高強度コ
ンクリート、に係るものである。The present invention was invented based on the above knowledge, and it exhibits sufficient strength even if the blended amount of silica fuum is as small as possible and even if the unit binder amount is reduced, and moreover, crushed stone can be used as coarse aggregate. The aim is to provide ultra-high strength concrete that has excellent workability even when used with ordinary Portland cement and has been put into practical use.
0 to 1000 kg/g of a binder consisting of fine slag powder and/or classified fly ash and silica fume, coarse aggregate, fine aggregate and water, and a single position of the binder is 450 to 550 kg/m. The present invention relates to ultra-high strength concrete, characterized in that the water-binding material ratio is 30% or less.
〔発明の詳細な説明］
本発明において重要なことは、結合材として普通ポルト
ランドセメント、ブレーン比表面積が５０００〜１００
００ｃｄ／ｇであるスラグ微粉末及び／又は分級フライ
アッシュおよびシリカフュウムからなる結合材を使用す
ることである。[Detailed Description of the Invention] What is important in the present invention is that ordinary Portland cement is used as the binding material, and the Blaine specific surface area is 5000 to 100.
00 cd/g of slag fine powder and/or a binder consisting of classified fly ash and silica fuum.
結合材の配合量は、その単位置が４５０〜５５０ｋｇ／
ｒｒｒとなる量であって、この単位置が４５０ｋｇ／ｎ
（未満であると、十分な超高強度、すなわち９００ｋｇ
ｆ／ｄ以上の超高強度が実現できず、一方、それが５５
０ｋｇ／ｒｒｒを越えると、水和熱の発生が顕著になっ
てひび割れを発生する恐れがあり、かつコスト的にも不
利となるので、本発明では結合材の単位置を４５０〜５
５０ｋｇ／ｍと定めた。The blending amount of the binding material is 450 to 550 kg per position.
rrr, and this single position is 450 kg/n
(Less than 900 kg is enough ultra-high strength
Ultra-high strength of f/d or higher cannot be achieved;
If it exceeds 0 kg/rrr, the generation of heat of hydration becomes noticeable and there is a risk of cracking, and it is also disadvantageous in terms of cost. Therefore, in the present invention, the single position of the bonding material is
It was set at 50 kg/m.
セメントの水和熱発生量を少なくしてコンクリートのひ
び割れを抑制し、そしてコンクリート構造体の端部と中
心部との強度差を少なくして、その強度の均一性の向上
を図る上では、普通ポルトランドセメントの配合量はで
きるだけ少ない方が望ましいが、一般に４００ｋｇ／ｍ
以上必要であり、本発明のコンクリートにおいては、普
通ポルトランドセメントの配合量は一般に４００〜５０
０ｋｇ／ボであるのが好ましい。In order to suppress the cracking of concrete by reducing the amount of heat generated from hydration of cement, and to reduce the difference in strength between the edges and the center of a concrete structure and improve the uniformity of its strength, it is common to It is desirable that the amount of Portland cement mixed is as small as possible, but generally 400 kg/m
In the concrete of the present invention, the amount of ordinary Portland cement mixed is generally 400 to 50.
Preferably, it is 0 kg/bo.
スラグ微粉末としては、例えば第一セメント株式会社製
のファインセラメントが挙げられる。Examples of the fine slag powder include fine ceramic manufactured by Daiichi Cement Co., Ltd.
また、分級フライアッシュとしては、例えば（株）四国
総合研究新製のものが挙げられる。Further, as the classified fly ash, for example, one manufactured by Shikoku Sogo Kenkyushin Co., Ltd. can be mentioned.
これらのブレーン比表面積が５０００ｄ／ｇ未満である
と、充分な強度を発現できず、一方それが１００００ｃ
１ｉ／ｇを越えると、コスト的に不利になるところから
、本発明ではスラグ微粉末および分級フライアッシュの
ブレーン比表面積を５０００〜１００００ｄ／ｇと定め
た。If these Blaine specific surface areas are less than 5,000 d/g, sufficient strength cannot be developed;
If it exceeds 1 i/g, it becomes disadvantageous in terms of cost, so in the present invention, the Blaine specific surface area of the fine slag powder and classified fly ash is set at 5,000 to 10,000 d/g.
スラグ微粉末および分級フライアッシュは、単独で、あ
るいは両者を組み合わせて用いることができる。Fine slag powder and classified fly ash can be used alone or in combination.
スラグ微粉末及び／又は分級フライアッシュの配合量は
、一般に２０〜７０）ｃｇ／ｒｒｆが好ましい。The blending amount of fine slag powder and/or classified fly ash is generally preferably 20 to 70) cg/rrf.
シリカフュウムとしては、輸入品、国産品など種々ある
が、シリカ含有量が８５％以上であり、ブレーン比表面
積が１５ｒｄ／ｇ以上のものであれば、いずれのシリカ
フュウムでも使用できる。又、製品形態としては、スラ
リー状、粉末状および顆粒状があり、そのいずれも使用
できるが、顆粒状製品が取扱い上好ましい。シリカフュ
ウムの配合量が少な過ぎると、コンクリートに十分な超
高強度が発現されず、一方その配合量が多くなり過ぎる
と、必要なワーカビリチー確保のために必要とされる高
性能減水剤の添加量が多くなって、スラグ微粉末および
分級フライアッシュの有利な作用が低下するとともにコ
スト的に不利となる。従って、シリカフュウムの単位置
は、２０〜５０ｋｇ／ｎ（の間であるのが望ましい。There are various types of silica fume, including imported and domestic products, but any silica fume can be used as long as it has a silica content of 85% or more and a Blaine specific surface area of 15rd/g or more. Further, as for the product form, there are slurry, powder and granule forms, and any of them can be used, but granule products are preferable for handling. If the amount of silica fume is too small, the concrete will not have sufficient ultra-high strength, while if the amount is too large, the amount of high performance water reducing agent required to ensure the necessary workability will be reduced. As a result, the advantageous effects of fine slag powder and classified fly ash are reduced and costs are disadvantageous. Therefore, the single position of silica fume is preferably between 20 and 50 kg/n.
水結合材比が、３０％より大きくなると、９゜Ｏｋｇｆ
／ｄｉ以上の２８日圧縮強度を確保出来なくなるため、
本発明ではこれを３０％以下と定めた。When the water binder ratio is greater than 30%, 9°Okgf
/di or higher 28-day compressive strength cannot be ensured,
In the present invention, this is set at 30% or less.
この水結合材比は好ましくは、２５〜２８％である。This water binder ratio is preferably between 25 and 28%.
水結合材比を低くする場合には、必要なワーカビリチー
を確保するため高性能減水剤を添加するが、この高性能
減水剤は高価であるため、多量に用いることはコスト的
に好ましくないが、本発明の結合材を用いる場合には、
高性能減水剤の必要量を一般に少なくすることができる
。高性能減水剤としては、種々のものが市販されており
、本発明のコンクリートでは、そのいずれも使用できる
が、なるべく、少量の添加でも必要なワーカビリチーが
得られ、かつあまり凝結遅延性の高くないものを選定す
ることが望ましく、このようなものとしては例えば花王
株式会社製のマイティ２０００ＷＨ１あるいは藤沢薬品
株式会社製のパリンクＦＰ２００Ｕが挙げられる。When lowering the water binder ratio, a high performance water reducer is added to ensure the necessary workability, but since this high performance water reducer is expensive, it is not desirable to use large amounts in terms of cost. When using the binding material of the present invention,
The amount of superplasticizer required can generally be reduced. Various types of high-performance water reducing agents are commercially available, and any of them can be used in the concrete of the present invention, but it is preferable to use one that provides the necessary workability even with the addition of a small amount and that does not have a high setting retardancy. It is desirable to select a suitable one, such as Mighty 2000WH1 manufactured by Kao Corporation or Pallink FP200U manufactured by Fujisawa Pharmaceutical Co., Ltd.
本発明による結合材を使用する場合、粗骨材として砕石
を使用することができる。超高強度コンクリートを得る
ためにはどのような砕石粗骨材が適しているかを種々調
査した結果、従来使用されている砕石の中で吸水率が１
％以下である砕石が好ましいことがわかった。吸水率は
骨材の空隙量に対応しており、空隙が大き過ぎると、圧
縮強度の低下をきたし、超高強度コンクリート用材料と
して好ましくない。また、砕石の角ぼり度が大きいと、
フレッシュコンクリートの流動性に不利であり、さらに
過度に角ぼっている場合には、圧縮応力の集中を受けや
すく、また強度欠陥を起こし易くなるので、過度に角ぼ
っているもの、あるいは著しく偏平なものを多量に含む
砕石の使用は避けるのが望ましい。従って、粗骨材とし
て使用される砕石は粒径判定実績率の大きいものが望ま
しい。When using the binder according to the invention, crushed stone can be used as coarse aggregate. As a result of various investigations into what kind of crushed stone coarse aggregate is suitable for obtaining ultra-high strength concrete, we found that the water absorption rate is 1 among the conventionally used crushed stone.
% or less was found to be preferable. The water absorption rate corresponds to the amount of voids in the aggregate, and if the voids are too large, the compressive strength will decrease, making it undesirable as a material for ultra-high strength concrete. In addition, if the angularity of crushed stone is large,
This is disadvantageous to the fluidity of fresh concrete, and if it is excessively angular, it will be susceptible to compressive stress concentration and strength defects will occur. It is desirable to avoid using crushed stone that contains a large amount of material. Therefore, it is desirable that the crushed stone used as coarse aggregate has a high particle size determination rate.
本発明を実施する場合、細骨材としてはコンクリートに
おいて通常用いられる川砂・山砂・海砂が好都合に用い
られる。When carrying out the present invention, river sand, mountain sand, and sea sand, which are commonly used in concrete, are conveniently used as the fine aggregate.
本発明のコンクリートは、常法に従って製造することが
でき、例えば、生コンプラントあるいは現場において、
セメント、スラグ微粉末及び／又は分級プライアッシュ
ならびにシリカフュウムと細骨材とを空練りし、ついで
所要量の半分の水を加えて混練し、その後残りの半分の
水と粗骨材および所望の場合その他の添加剤、例えば高
性能減水剤またはＡ、 Ｅ剤等を加え、混練することに
よって製造される。The concrete of the present invention can be manufactured according to a conventional method, for example, in a ready-mixed concrete plant or on-site.
Cement, slag fine powder and/or classified ply ash, silica fume and fine aggregate are dry kneaded, then half of the required amount of water is added and kneaded, and then the remaining half of water is mixed with coarse aggregate and if desired. It is manufactured by adding other additives, such as a high performance water reducing agent or agents A and E, and kneading.
［実施例］
ついで、本発明を実施例を参照して具体的に説明するが
、本発明はこれらの実施例に限定されない
セメントとして小野田セメント株式会社製の普通ポルト
ランドセメントを、シリカフュウムとして５ｃａｎｃｃ
ｖ Ｃｈｅｍｉｃａｌｓ社製のマイクロボズ（顆粒状、
粒径：０．１３ミクロン）を、スラグ微粉末として第一
セメント株式会社のファインセラメント２０Ａ（ブレー
ン比表面積： ６０００ｃｍ２ｔ／ ｇ、平均粒径：６
ミクロン）を、分級フライアッシュとして（株）四国総
合研究新製のＦＡ２０（ブレーン比表面積： ６２３０
ｃ１ｉＩ／ ｇ、平均粒径ニアミクロン）をそれぞれ用
いた。また、粗骨材としては青梅産の砕石（最大骨材寸
法：２０ｍｎ、粒径判定実績率：５９．１％、吸水率：
０．７１％）を、細骨材としては相模用産川砂７０％
、注量山砂３０％の混合砂を用いた。[Example] Next, the present invention will be specifically explained with reference to Examples, but the present invention is not limited to these Examples. As a cement, ordinary Portland cement manufactured by Onoda Cement Co., Ltd.
v Micro Boz (granular, manufactured by Chemicals)
Particle size: 0.13 microns) was used as fine slag powder using Daiichi Cement Co., Ltd.'s Fine Ceramin 20A (Brain specific surface area: 6000cm2t/g, average particle size: 6).
FA20 (Brain specific surface area: 6230) manufactured by Shikoku Research Institute Co., Ltd. as classified fly ash
c1iI/g, average particle size near microns) were used, respectively. In addition, as coarse aggregate, crushed stone from Ome (maximum aggregate size: 20 mm, particle size determination rate: 59.1%, water absorption rate:
0.71%), and 70% of Sagami-produced river sand as fine aggregate.
, mixed sand containing 30% poured mountain sand was used.
さらに、高性能減水剤として花王株式会社のマイティ２
０００ＷＨまたは藤沢薬品株式会社のバリツクＦＰ２０
０Ｕを用い、ＡＥ剤として藤沢薬品株式会社のパリツク
ＡＥ４００を用いた。Furthermore, Kao Corporation's Mighty 2 is a high-performance water reducer.
000WH or Fujisawa Pharmaceutical Co., Ltd.'s Balik FP20
0U was used, and Parix AE400 from Fujisawa Pharmaceutical Co., Ltd. was used as the AE agent.
混練は、パン型強制練りミキサーを用いて行った。先ず
、結合材と細骨材の空練りを１．５分間行い、これに、
所定量の高性能減水剤の半量を混ぜた水を加えて３分間
、さらに粗骨材および高性能減水剤の半量を加えて３分
間混練した。ＡＥ剤を使用する場合は、混練水に添加し
た。The kneading was performed using a pan-type forced kneading mixer. First, the binder and fine aggregate were mixed for 1.5 minutes, and then
Water mixed with half of a predetermined amount of high performance water reducer was added and kneaded for 3 minutes, and then coarse aggregate and half of the high performance water reducer were added and kneaded for 3 minutes. When using an AE agent, it was added to the kneading water.
上記のようにして製造した本発明コンクリ−１・試料１
〜５および比較試料１〜４の各１が当たりの組成を第１
表に示す。Invention concrete 1/Sample 1 manufactured as described above
-5 and Comparative Samples 1 to 4 each have the same composition as the first
Shown in the table.
次に、これらの試料のスランプ値、スランプフロー値、
空気量および２８日圧縮強度を測定し、その結果を第２
表に示した。Next, the slump value, slump flow value, and
Measure the air volume and 28-day compressive strength, and submit the results to the second
Shown in the table.
第２表
第２表に示される結果から、
■結合材としてセメントおよびシリカフュウムの他にス
ラグ微粉末および分級フライアッシュのいずれか一方を
含有し、かつ水結合材比が本発明の範囲内にある本発明
試料１〜５においては、いずれも、９００ｋｇｆ／ｃｄ
以上の２８日圧縮強度と４５１以上のスランプフロー値
が得られるのに対して、結合材としてスラグ微粉末およ
び分級フライアッシュのいずれも含有しない比較試料１
〜３ではスランプフロー値が４５ＣＩｌに達せず、また
水結合材比が本発明の範囲外にある比較試料４では十分
な２８日圧縮強度が得られないこと、および■それぞれ
同量の高性能減水剤を含有している本発明試料１と比較
試料ｌ；本発明試料２および３と比較試料２；および本
発明試料４および５と比較試料３について、それぞれス
ランプフロー値を比較すると、いずれも本発明試料が比
較試料よりも、その値が大きく、したがって、スラグ微
粉末も分級フライアッシュも含まない従来の超高強度コ
ンクリートと同程度のスランプフロー値を本発明コンク
リートにおいて達成しようとするときには、高性能減水
剤の添加量を減少できること、がわかる。From the results shown in Table 2, it can be concluded that: - Contains either slag fine powder or classified fly ash in addition to cement and silica fume as a binder, and the water binder ratio is within the range of the present invention. In each of the present invention samples 1 to 5, 900 kgf/cd
In contrast to the above 28-day compressive strength and slump flow value of 451 or higher, Comparative Sample 1 does not contain either fine slag powder or classified fly ash as a binder.
~3, the slump flow value did not reach 45CIl, and comparative sample 4, whose water binder ratio was outside the range of the present invention, could not obtain sufficient 28-day compressive strength, and Comparing the slump flow values of Inventive Sample 1 and Comparative Sample 1; Inventive Samples 2 and 3 and Comparative Sample 2; and Inventive Samples 4 and 5 and Comparative Sample 3, which contain a The value of the inventive sample is larger than that of the comparative sample. Therefore, when trying to achieve the same slump flow value in the inventive concrete as the conventional ultra-high strength concrete that does not contain fine slag powder or classified fly ash, it is necessary to It can be seen that the amount of performance water reducing agent added can be reduced.
以上述べた説明から明らかなように、本発明によると、
単位結合材量を少なくし、かつシリカフュウムの配合量
を減らしても十分超高強度を発揮し、したがってセメン
ト水和熱の発生が抑えられてコンクリートのひび割れが
防止されるとともに、粗骨材として砕石を使用しても現
場打設に有利な優れたワーカビリチーを示し、従って高
性能減水剤の添加量を節減できる、実用化に適した超高
強度コンクリートが提供される。As is clear from the above description, according to the present invention,
Even if the amount of unit binder is reduced and the amount of silica fume is reduced, it still exhibits sufficiently high strength, suppressing the generation of heat of cement hydration and preventing cracking of concrete, and can also be used as a coarse aggregate for crushed stone. The present invention provides ultra-high strength concrete suitable for practical use, which exhibits excellent workability that is advantageous for on-site pouring even when using the present invention, and can therefore reduce the amount of high-performance water reducing agent added.
Claims (2)
５０００〜１００００ｃｍ＾２／ｇであるスラグ微粉末
及び／又は分級フライアッシュおよびシリカフュウムか
らなる結合材、粗骨材、細骨材および水を含み、そして
前記結合材の単位置が４５０〜５５０ｋｇ／ｍ＾２であ
り、かつ水結合材比が３０％以下であることを特徴とす
る、超高強度コンクリート。(1) Ordinary Portland cement, containing a binder consisting of fine slag powder and/or classified fly ash and silica fume with a Blaine specific surface area of 5,000 to 10,000 cm^2/g, coarse aggregate, fine aggregate, and water, and the above-mentioned An ultra-high strength concrete characterized in that a single position of a binder is 450 to 550 kg/m^2 and a water binder ratio is 30% or less.
高強度コンクリート。(2) The ultra-high strength concrete according to claim 1, wherein crushed stone is used as the coarse aggregate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2242868A JPH04124054A (en) | 1990-09-14 | 1990-09-14 | Superhigh-strength concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2242868A JPH04124054A (en) | 1990-09-14 | 1990-09-14 | Superhigh-strength concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04124054A true JPH04124054A (en) | 1992-04-24 |
Family
ID=17095440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2242868A Pending JPH04124054A (en) | 1990-09-14 | 1990-09-14 | Superhigh-strength concrete |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04124054A (en) |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996024564A1 (en) * | 1995-02-06 | 1996-08-15 | Atomic Energy Of Canada Limited | Low-heat high-performance concrete |
| JPH11278879A (en) * | 1998-03-30 | 1999-10-12 | Sumitomo Osaka Cement Co Ltd | Cement composition for mass concrete |
| JPH11278908A (en) * | 1998-03-31 | 1999-10-12 | Sumitomo Osaka Cement Co Ltd | Cement for high strength and high fluidity concrete and high strength and high fluidity concrete |
| JPH11278880A (en) * | 1998-03-31 | 1999-10-12 | Sumitomo Osaka Cement Co Ltd | Cement composition for high strength and high fluidity concrete |
| JP2002087866A (en) * | 2000-09-14 | 2002-03-27 | Sumitomo Osaka Cement Co Ltd | Method of improving strength of concrete |
| JP2007076956A (en) * | 2005-09-14 | 2007-03-29 | Denki Kagaku Kogyo Kk | Wear-resistant concrete product and its manufacturing method |
| JP2007076959A (en) * | 2005-09-14 | 2007-03-29 | Denki Kagaku Kogyo Kk | Formed body composed of mortar or concrete and subjected to bending moment |
| JP2007076955A (en) * | 2005-09-14 | 2007-03-29 | Denki Kagaku Kogyo Kk | Centrifugal force concrete product and its manufacturing method |
| KR100897689B1 (en) * | 2008-07-22 | 2009-05-14 | 현대건설주식회사 | Low heat building concrete composition |
| JP2009298645A (en) * | 2008-06-12 | 2009-12-24 | Kao Corp | Hydraulic composition |
| JP2012176893A (en) * | 2012-06-08 | 2012-09-13 | Kao Corp | Method of manufacturing hydraulic composition |
| CN104045280A (en) * | 2014-06-09 | 2014-09-17 | 暨南大学 | C120 ultrahigh-strength concrete easy for ultrahigh-rise pumping |
| JP2014169213A (en) * | 2013-03-05 | 2014-09-18 | Sumitomo Osaka Cement Co Ltd | Ultra-high-strength high-fluidity concrete and cement composition |
| JP2015131747A (en) * | 2014-01-15 | 2015-07-23 | 住友大阪セメント株式会社 | cement composition |
| CN106747100A (en) * | 2016-12-28 | 2017-05-31 | 广州大学 | A kind of high-strength mechanism rock sand concrete |
| CN107188475A (en) * | 2017-05-31 | 2017-09-22 | 南通不二环境科技有限公司 | A kind of modified pervious concrete formula |
| CN107500623A (en) * | 2017-08-17 | 2017-12-22 | 暨南大学 | A kind of high-strength concrete of low water binder ratio high doping quantity of fly ash |
| CN111646753A (en) * | 2020-06-18 | 2020-09-11 | 湖北合力久盛混凝土有限公司 | Preparation method of C80 machine-made sand concrete |
| CN114685119A (en) * | 2022-04-02 | 2022-07-01 | 西京学院 | Concrete with industrial solid waste silica fume replacing cement slurry and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02102152A (en) * | 1988-10-06 | 1990-04-13 | Chichibu Cement Co Ltd | Method for reinforcing concrete or mortar, hydraulic composite material and reinforcing additive |
-
1990
- 1990-09-14 JP JP2242868A patent/JPH04124054A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02102152A (en) * | 1988-10-06 | 1990-04-13 | Chichibu Cement Co Ltd | Method for reinforcing concrete or mortar, hydraulic composite material and reinforcing additive |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996024564A1 (en) * | 1995-02-06 | 1996-08-15 | Atomic Energy Of Canada Limited | Low-heat high-performance concrete |
| JPH11278879A (en) * | 1998-03-30 | 1999-10-12 | Sumitomo Osaka Cement Co Ltd | Cement composition for mass concrete |
| JPH11278908A (en) * | 1998-03-31 | 1999-10-12 | Sumitomo Osaka Cement Co Ltd | Cement for high strength and high fluidity concrete and high strength and high fluidity concrete |
| JPH11278880A (en) * | 1998-03-31 | 1999-10-12 | Sumitomo Osaka Cement Co Ltd | Cement composition for high strength and high fluidity concrete |
| JP2002087866A (en) * | 2000-09-14 | 2002-03-27 | Sumitomo Osaka Cement Co Ltd | Method of improving strength of concrete |
| JP4593412B2 (en) * | 2005-09-14 | 2010-12-08 | 電気化学工業株式会社 | Centrifugal concrete product and manufacturing method thereof |
| JP2007076955A (en) * | 2005-09-14 | 2007-03-29 | Denki Kagaku Kogyo Kk | Centrifugal force concrete product and its manufacturing method |
| JP2007076956A (en) * | 2005-09-14 | 2007-03-29 | Denki Kagaku Kogyo Kk | Wear-resistant concrete product and its manufacturing method |
| JP4620555B2 (en) * | 2005-09-14 | 2011-01-26 | 電気化学工業株式会社 | Molded bodies that receive bending moments made of mortar or concrete |
| JP4620554B2 (en) * | 2005-09-14 | 2011-01-26 | 電気化学工業株式会社 | Abrasion resistant concrete product and manufacturing method thereof |
| JP2007076959A (en) * | 2005-09-14 | 2007-03-29 | Denki Kagaku Kogyo Kk | Formed body composed of mortar or concrete and subjected to bending moment |
| JP2009298645A (en) * | 2008-06-12 | 2009-12-24 | Kao Corp | Hydraulic composition |
| KR100897689B1 (en) * | 2008-07-22 | 2009-05-14 | 현대건설주식회사 | Low heat building concrete composition |
| JP2012176893A (en) * | 2012-06-08 | 2012-09-13 | Kao Corp | Method of manufacturing hydraulic composition |
| JP2014169213A (en) * | 2013-03-05 | 2014-09-18 | Sumitomo Osaka Cement Co Ltd | Ultra-high-strength high-fluidity concrete and cement composition |
| JP2015131747A (en) * | 2014-01-15 | 2015-07-23 | 住友大阪セメント株式会社 | cement composition |
| CN104045280A (en) * | 2014-06-09 | 2014-09-17 | 暨南大学 | C120 ultrahigh-strength concrete easy for ultrahigh-rise pumping |
| CN106747100A (en) * | 2016-12-28 | 2017-05-31 | 广州大学 | A kind of high-strength mechanism rock sand concrete |
| CN107188475A (en) * | 2017-05-31 | 2017-09-22 | 南通不二环境科技有限公司 | A kind of modified pervious concrete formula |
| CN107500623A (en) * | 2017-08-17 | 2017-12-22 | 暨南大学 | A kind of high-strength concrete of low water binder ratio high doping quantity of fly ash |
| CN111646753A (en) * | 2020-06-18 | 2020-09-11 | 湖北合力久盛混凝土有限公司 | Preparation method of C80 machine-made sand concrete |
| CN114685119A (en) * | 2022-04-02 | 2022-07-01 | 西京学院 | Concrete with industrial solid waste silica fume replacing cement slurry and preparation method thereof |
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