JPH09241064A - Concrete composition - Google Patents
Concrete compositionInfo
- Publication number
- JPH09241064A JPH09241064A JP8052914A JP5291496A JPH09241064A JP H09241064 A JPH09241064 A JP H09241064A JP 8052914 A JP8052914 A JP 8052914A JP 5291496 A JP5291496 A JP 5291496A JP H09241064 A JPH09241064 A JP H09241064A
- Authority
- JP
- Japan
- Prior art keywords
- water
- concrete
- surface tension
- soluble polymer
- compsn
- 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.)
- Granted
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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/0045—Polymers chosen for their physico-chemical characteristics
- C04B2103/0053—Water-soluble polymers
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (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、コンクリート組成
物、詳しくは高流動性コンクリート等の水溶性高分子を
含有するコンクリート組成物に関する。TECHNICAL FIELD The present invention relates to a concrete composition, and more particularly to a concrete composition containing a water-soluble polymer such as high fluidity concrete.
【０００２】[0002]
【従来の技術】近年、二次製品、建設材料等の用途にお
いて振動締め固め等の作業をせずとも自己充填できる高
流動性のコンクリートが使用され始めている。高流動性
コンクリートは型枠を振動させないでも型枠内の隅々ま
で充填できる有利さがあるが、フレッシュ時でのコンク
リート粘性が高いために製品表面と型枠との界面に気泡
が抜けずに残る問題がある。そのため、型枠に微振動を
与えたり、型枠に剥離剤を塗布することなどが提案され
ているが、十分に解決できていない。2. Description of the Related Art In recent years, high fluidity concrete which can be self-filled without using vibration compaction or the like has been started to be used in applications such as secondary products and construction materials. High-fluidity concrete has the advantage that it can be filled into every corner of the form without vibrating the form, but since the concrete viscosity at the time of freshness is high, bubbles do not escape at the interface between the product surface and the form. There are remaining problems. Therefore, it has been proposed to apply slight vibration to the mold or apply a release agent to the mold, but this has not been fully solved.
【０００３】しかして、この問題は、高流動性コンクリ
ートのうち、高炉スラグ微粉末やフライアッシュ等を多
量添加して流動性調節した粉体系高流動性コンクリート
よりも、分離低減剤として水溶性高分子を混練水に溶解
させた水溶性高分子系高流動性コンクリートにおいて顕
著に発生する。特に、水溶性高分子系高流動性コンクリ
ートでは、その粘性の高さから表面上に残る気泡の径が
著しく大きなものとなり、得られる硬化体の美観性を大
きく低下させていた。[0003] However, this problem is higher in water-solubility as a separation reducing agent than high-fluidity concrete powder type high-fluidity concrete in which the fluidity is adjusted by adding a large amount of blast furnace slag fine powder, fly ash and the like. It occurs remarkably in water-soluble polymer-based high-fluidity concrete in which molecules are dissolved in kneading water. In particular, in water-soluble polymer-based high-fluidity concrete, due to its high viscosity, the diameter of the bubbles remaining on the surface was remarkably large, and the aesthetic appearance of the obtained cured product was greatly reduced.
【０００４】また、こうした水溶性高分子系高流動性コ
ンクリートの硬化体は、表面だけでなく内部にも大きな
気泡が発生しており、このコンクリート硬化体は該大き
な気泡を含有することに起因して低温に晒され凍結融解
した場合において破壊しやすい問題があった。In addition, the hardened body of such water-soluble polymer type high-fluidity concrete has large air bubbles generated not only on the surface but also inside thereof, which is caused by the fact that the hardened concrete contains the large air bubbles. There was a problem that it was easily destroyed when it was exposed to low temperature and frozen and thawed.
【０００５】[0005]
【発明が解決しようとする課題】こうした中にあって、
特開昭６２−２２３０４７号公報にはコンクリートの混
練水の表面張力を３５ｄｙｎｅ／ｃｍ以下にしてコンク
リート製品の表面気泡を低減する方法が記載されてい
る。この方法はコンクリート混練水の表面張力を下げて
型枠面に接するコンクリート表面上の気泡を上部に抜け
出したり、コンクリート内部に移行させることによって
表面気泡を低減させるものである。しかしながら、該刊
行物には、コンクリートの含有成分に水溶性高分子を用
いることは記載されておらず、上記気泡の低減には、こ
の水溶性高分子を含有するコンクリートに著しく生じる
大きな気泡の低減は意図されていない。また、このよう
に水溶性高分子を含有するコンクリートが示されていな
いことから、かかるコンクリートに固有に激しく生じる
前記凍結融解時の破壊の問題も何ら記載も示唆もされて
いない。[Problems to be Solved by the Invention]
Japanese Unexamined Patent Publication No. 62-223047 describes a method for reducing the surface bubbles of concrete products by adjusting the surface tension of kneading water of concrete to 35 dyne / cm or less. This method is to reduce the surface bubbles by lowering the surface tension of the concrete kneading water and letting the bubbles on the concrete surface in contact with the mold surface escape to the upper part or migrate into the concrete. However, the publication does not describe the use of a water-soluble polymer as a component contained in concrete, and for the reduction of the bubbles, reduction of large bubbles significantly generated in concrete containing the water-soluble polymer. Is not intended. Further, since the concrete containing the water-soluble polymer is not shown in this way, there is no description or suggestion of the problem of destruction at the time of freezing and thawing which occurs violently in the concrete.
【０００６】以上の背景にあって本発明は、水溶性高分
子を含有するコンクリート組成物において、表面に生じ
る気泡をより小さくして得られる硬化体の美観性を高
め、また、該硬化体の凍結融解時の破壊に対する強度
（以下、耐凍害性と略する）を向上させることを目的と
する。[0006] Against the above background, the present invention provides a concrete composition containing a water-soluble polymer to enhance the aesthetic appearance of a cured product obtained by making bubbles generated on the surface smaller, and to improve the aesthetic appearance of the cured product. It is intended to improve the strength against breakage during freeze-thawing (hereinafter, abbreviated as frost damage resistance).
【０００７】[0007]
【課題を解決するための手段】本発明者らは、上記の課
題に鑑み鋭意研究を続けてきた。その結果、混練水に界
面活性剤を含有させ該混練水の表面張力を特定の値に低
下させることにより、上記の課題が解決できることを見
いだし、本発明を完成するに至った。Means for Solving the Problems The present inventors have intensively studied in view of the above problems. As a result, they have found that the above problem can be solved by adding a surfactant to the kneading water to reduce the surface tension of the kneading water to a specific value, and completed the present invention.
【０００８】即ち、本発明は、水溶性高分子が溶解する
水により混練されてなるコンクリート組成物であって、
該混練水に表面張力が２５〜４０ｄｙｎｅ／ｃｍになる
量の界面活性剤が含有されてなるコンクリート組成物で
ある。That is, the present invention provides a concrete composition which is kneaded with water in which a water-soluble polymer is dissolved,
A concrete composition in which the kneading water contains an amount of a surfactant having a surface tension of 25 to 40 dyne / cm.
【０００９】本発明においてコンクリート組成物は、上
記の如くその混練水に水溶性高分子が溶解されるもので
あれば公知の如何なるものであっても良い。好ましく
は、混練水に対する水溶性高分子の溶解量が、セメント
１００重量部に対し０．０１〜１０重量部のものが好適
である。特に、分離低減剤として上記水溶性高分子が溶
解する高流動性コンクリートであるのが好適である。こ
こで、この高流動性コンクリートは、セメント、水及び
上記水溶性高分子の他、通常、骨材、減水剤を含有して
いる。その各成分の配合割合は、セメント１００重量部
に対し水３０〜５０重量部好ましくは３５〜４５重量
部、水溶性高分子０．０１〜１．０重量部、骨材３００
〜６００重量部、減水剤０．５〜３．５重量部であるの
が好適である。また、こうした高流動性コンクリート
は、自己充填性や材料の分離抵抗性を勘案するとスラン
プフロー値が５０〜７０ｃｍであるのが良好である。In the present invention, the concrete composition may be any known one as long as the water-soluble polymer is dissolved in the kneading water as described above. It is preferable that the amount of the water-soluble polymer dissolved in the kneading water be 0.01 to 10 parts by weight with respect to 100 parts by weight of cement. In particular, highly flowable concrete in which the water-soluble polymer is dissolved as the separation reducing agent is suitable. Here, the high-fluidity concrete usually contains an aggregate and a water-reducing agent in addition to cement, water and the above water-soluble polymer. The mixing ratio of each component is 30 to 50 parts by weight, preferably 35 to 45 parts by weight of water, 0.01 to 1.0 parts by weight of water-soluble polymer, and 300 parts of aggregate with respect to 100 parts by weight of cement.
˜600 parts by weight and 0.5 to 3.5 parts by weight of the water reducing agent are preferable. Further, it is preferable that such a high-fluidity concrete has a slump flow value of 50 to 70 cm in consideration of self-filling property and material separation resistance.
【００１０】本発明においてセメントは、公知のものが
特に制限なく使用できる。具体的には、普通ポルトラン
ドセメント、早強セメント、中庸熱セメント、高炉セメ
ント、フライアッシュセメント、シリカセメントなどが
挙げられる。In the present invention, known cements can be used without particular limitation. Specific examples thereof include ordinary Portland cement, early strength cement, moderate heat cement, blast furnace cement, fly ash cement and silica cement.
【００１１】一方、本発明において水溶性高分子は、公
知のものが特に制限なく使用できる。具体的には、非イ
オン性水溶性セルロース類、ポリアクリルアミド類、ポ
リエチレングリコール等が挙げられ、特に、ヒドロキシ
エチルセルロースやヒドロキシプロピルメチルセルロー
ス、エチルヒドロキシエチルセルロース等の非イオン性
水溶性セルロース類が好適である。これらの水溶性高分
子は、２重量％水溶液の粘度が８，０００〜１００，０
００ｃｐｓ、好ましくは１０，０００〜５０，０００ｃ
ｐｓであるのが好適である。On the other hand, known water-soluble polymers can be used in the present invention without particular limitation. Specific examples thereof include nonionic water-soluble celluloses, polyacrylamides, polyethylene glycol, and the like, and nonionic water-soluble celluloses such as hydroxyethyl cellulose, hydroxypropylmethyl cellulose, and ethyl hydroxyethyl cellulose are particularly preferable. These water-soluble polymers have a viscosity of a 2 wt% aqueous solution of 8,000 to 100,0.
00 cps, preferably 10,000-50,000 c
It is preferably ps.
【００１２】また、骨材は、ＪＩＳの基準に合格したも
のであれば砂、砕砂等の細骨材や砂利、砕石等の粗骨材
などのいずれの使用も可能である。As the aggregate, any fine aggregate such as sand or crushed sand or coarse aggregate such as gravel or crushed stone may be used as long as it meets the JIS standard.
【００１３】さらに、減水剤は、公知のものが特に制限
なく使用できる。具体的には、高縮合トリアジン系化合
物、ポリカルボン酸塩系誘導体、ナフタリンスルホン酸
塩のホルマリン縮合物、メラミンスルホン酸塩のホルマ
リン縮合物、リグニンスルホン酸塩系化合物、芳香族ア
ミノスルホン酸系高分子化合物等が使用できる。Further, known water reducing agents can be used without particular limitation. Specifically, highly condensed triazine-based compounds, polycarboxylate-based derivatives, formalin condensates of naphthalene sulfonates, formalin condensates of melamine sulfonates, lignin sulfonate-based compounds, aromatic amino sulfonate-based compounds A molecular compound or the like can be used.
【００１４】次に、本発明では、上記水溶性高分子が溶
解する水により混練されてなるコンクリート組成物の混
練水に、界面活性剤を表面張力が２５〜４０ｄｙｎｅ／
ｃｍ、好適には２７〜３８ｄｙｎｅ／ｃｍになる量含有
させる。それにより、コンクリート組成物には、空気そ
のものは取り込まれやすくなるが、その一方で、該取り
込まれた空気の分散性が著しく向上し大きな径のものに
成長することが抑制される。その結果、かかる組成物が
硬化したコンクリート硬化体は、表面に大きな気泡が少
なく美観性に優れ、また、内部の気泡も径が小さいこと
に起因して耐凍害性が向上したものとなる。Next, in the present invention, a surfactant is added to the kneading water of the concrete composition obtained by kneading with the water in which the water-soluble polymer is dissolved, with a surface tension of 25 to 40 dyne /
cm, preferably 27 to 38 dyne / cm. Thereby, air itself is easily taken into the concrete composition, but on the other hand, the dispersibility of the taken air is significantly improved and growth of a large diameter is suppressed. As a result, the hardened concrete obtained by hardening such a composition has few large air bubbles on the surface and is excellent in aesthetic appearance, and the air bubbles inside have a small diameter, and thus have improved frost damage resistance.
【００１５】なお、混練水の表面張力は、混練したコン
クリート組成物からろ過により液成分を分離し、それの
表面張力を測定することにより求められる。The surface tension of the kneading water is determined by separating the liquid component from the kneaded concrete composition by filtration and measuring the surface tension of the liquid component.
【００１６】ここで、混練水の表面張力が４０ｄｙｎｅ
／ｃｍより高い場合、型枠面とコンクリート組成物表面
の界面のぬれ性が悪く、表面の大きな気泡が分散されず
残ってしまう。また、耐凍害性においても劣ってしま
う。Here, the surface tension of the kneading water is 40 dyne.
When it is higher than / cm, the wettability of the interface between the mold surface and the surface of the concrete composition is poor, and large air bubbles on the surface remain undispersed. Also, it is inferior in frost damage resistance.
【００１７】一方、表面張力が２５ｄｙｎｅ／ｃｍより
小さくなっても、界面活性剤の添加量がかなり増加する
ために空気量が過度に増えすぎ、耐凍害性が低下するも
のとなったり、美観性も十分でないものとなる。これ
は、消泡剤を多量に添加してコンクリート内部の空気量
を調整することによってある程度改善することはできる
が、このように消泡剤を多量に添加して空気量を低下さ
せても前記表面張力の要件が満足されていなければ、同
程度の空気量で比較した場合、本発明のコンクリート組
成物ほどの良好な美観性や耐凍害性の効果は達成されな
い。On the other hand, even if the surface tension is less than 25 dyne / cm, the amount of air added excessively increases the amount of the surfactant added, and the frost resistance is lowered, and the aesthetic appearance is reduced. Will not be enough. This can be improved to some extent by adjusting the amount of air inside the concrete by adding a large amount of defoaming agent, but even if the amount of air is reduced by adding a large amount of defoaming agent as described above, If the surface tension requirement is not satisfied, the effects of aesthetics and frost damage resistance as good as those of the concrete composition of the present invention are not achieved when compared with the same amount of air.
【００１８】本発明において用いる界面活性剤として
は、公知のものが特に制限されることなく使用される。
好適にはアニオン系またはノニオン系のものが良好であ
る。また、ＨＬＢ値が８〜２０のものが好ましい。具体
的には、アルキルジフェニルエーテルジスルホン酸塩、
ポリオキシエチレン・ポリオキシプロピレン・ブロック
ポリマー、ポリオキシエチレン脂肪酸エステル、ポリオ
キシエチレンノニフェニルエーテル、ジオクチルスルホ
コハク酸塩、高級アルキルエーテル硫酸エステル塩、ポ
リオキシプロピレングリコールモノエーテル等が挙げら
れこれらの１種または２種以上を組み合わせて用いても
良い。好適にはポリオキシエチレン脂肪酸エステルが好
ましい。As the surfactant used in the present invention, known surfactants can be used without particular limitation.
Anionic or nonionic ones are preferable. Further, those having an HLB value of 8 to 20 are preferable. Specifically, alkyl diphenyl ether disulfonate,
Polyoxyethylene / polyoxypropylene / block polymer, polyoxyethylene fatty acid ester, polyoxyethylene noniphenyl ether, dioctyl sulfosuccinate, higher alkyl ether sulfate ester salt, polyoxypropylene glycol monoether and the like, one of these Alternatively, two or more kinds may be used in combination. Polyoxyethylene fatty acid ester is preferred.
【００１９】なお、本発明では、さらに、コンクリート
表面の気泡を低減する目的で、微粉末粉体を添加するこ
とが有効である。即ち、それにより、コンクリート組成
物の流動速度がさらに向上し、充填する際に巻き込まれ
る気泡がより少なくなる。また、巻き込まれた気泡が抜
ける速度も速くなり、表面気泡は少なくなる。ここで、
微粉末粉体とは、具体的には石灰石粉末や高炉スラグ、
フライアッシュ、シリカフューム等のポゾラン反応を有
するものが挙げられる。これらの微粉末粉体の配合量
は、通常、セメント１００重量部に対して５〜７０重量
部が好ましい。また、平均粒子径はシリカフューム以外
は１〜５０μｍ程度でシリカフュームは０．１〜０．５
μｍ程度である。Further, in the present invention, it is effective to add fine powder powder for the purpose of reducing bubbles on the concrete surface. That is, it further improves the flow rate of the concrete composition and results in fewer bubbles being entrapped during filling. In addition, the speed at which the air bubbles that are caught escape is increased, and the surface air bubbles are reduced. here,
Fine powder is specifically limestone powder or blast furnace slag,
Examples thereof include those having a pozzolanic reaction such as fly ash and silica fume. Usually, the amount of these fine powder powders is preferably 5 to 70 parts by weight with respect to 100 parts by weight of cement. The average particle size is about 1 to 50 μm except for silica fume, and silica fume is 0.1 to 0.5 μm.
It is about μm.
【００２０】さらに、本発明では、消泡剤を加えること
が、硬化体の美観を向上させる上で好ましい。また、本
発明では、このように消泡剤を配合させること等によ
り、コンクリート組成物に含まれる空気量を１〜６％、
好適には３〜５％とするのが好ましい。本発明のコンク
リート組成物は、該空気量が同程度のもので比較して
も、前記混練水の表面張力が特定の値にあることによ
り、美観性と耐凍害性は良好に改善されている。Further, in the present invention, it is preferable to add an antifoaming agent in order to improve the appearance of the cured product. Further, in the present invention, the amount of air contained in the concrete composition is 1 to 6% by blending the defoaming agent as described above.
It is preferably 3 to 5%. In the concrete composition of the present invention, the aesthetics and the frost damage resistance are well improved because the surface tension of the kneading water is at a specific value even when the air amounts are similar. .
【００２１】ここで、消泡剤としては、具体的には、ポ
リエーテル系、高級アルコール系、シリコーン系等があ
るが、本発明ではこれらが特に限定されることなく使用
される。この消泡剤の使用量は、通常、セメント１００
重量部に対し０．００１〜０．１重量部が好ましい。そ
の他本発明では、高縮合トリアジン系化合物、ポリカル
ボン酸塩系誘導体、ナフタリンスルホン酸塩のホルマリ
ン縮合物、メラミンスルホン酸塩のホルマリン縮合物、
リグニンスルホン酸塩系化合物、芳香族アミノスルホン
酸系高分子化合物等の公知の添加剤が配合されても良
い。Specific examples of the defoaming agent include polyether type, higher alcohol type, silicone type and the like. In the present invention, these are used without particular limitation. The amount of this antifoaming agent is usually 100
0.001 to 0.1 parts by weight is preferable with respect to parts by weight. Others In the present invention, highly condensed triazine compounds, polycarboxylic acid salt derivatives, formalin condensates of naphthalene sulfonate, formalin condensates of melamine sulfonate,
Known additives such as a lignin sulfonate compound and an aromatic amino sulfonic acid polymer compound may be added.
【００２２】本発明において、コンクリート組成物の練
り混ぜは、如何なる方法で行っても良く、例えば予め水
に水溶性高分子と界面活性剤を配合させた後、混練水と
して他の成分と混練しても良く、或いは水、水溶性高分
子及び界面活性剤を各別々に他の成分と共に混練しても
良い。In the present invention, the concrete composition may be kneaded by any method, for example, water is mixed with a water-soluble polymer and a surfactant in advance and then kneaded with other components as kneading water. Alternatively, water, water-soluble polymer and surfactant may be kneaded separately with other components.
【００２３】[0023]
【発明の効果】本発明のコンクリート組成物は、流動安
定性に優れ且つ、得られる高流動性コンクリート硬化体
はコンクリート表面気泡径が小さく、美観に優れるもの
となる。従って、二次製品等の外観が重要視される用途
に好適である。また、このコンクリート硬化体は、凍結
融解時の強度についても良好である。EFFECTS OF THE INVENTION The concrete composition of the present invention is excellent in flow stability, and the obtained high-fluidity concrete hardened product has a small bubble diameter on the concrete surface and is excellent in appearance. Therefore, it is suitable for applications in which the appearance of secondary products and the like is important. In addition, this hardened concrete has good strength when freeze-thawed.
【００２４】[0024]
【実施例】以下、本発明を更に具体的に説明するため実
施例を掲げるが、本発明はこれらの実施例に限定される
ものではない。EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.
【００２５】なお、各試験及び試験方法については以下
のとおりである。The tests and test methods are as follows.
【００２６】１）美観性評価試験：10×10×40cmの型枠
にコンクリートを流し込み、無振動で成型した。養生
は、気中養生とした。硬化後、脱型しコンクリート表面
の気泡を観察した。なお、美観性の評価は、10×10cmの
透明フィルムにコンクリート表面の気泡を書きとり、画
像解析装置によって100cm2中の気泡の合計面積と100cm2
中の直径５mm以上の気泡数を測定した。1) Aesthetic evaluation test: Concrete was poured into a 10 × 10 × 40 cm mold and molded without vibration. The curing was performed in the air. After curing, the mold was removed and bubbles on the concrete surface were observed. The evaluation of aesthetic appearance is write bubble concrete surface transparent film 10 × 10 cm, the total area of bubbles in 100 cm 2 by an image analyzer and 100 cm 2
The number of bubbles having a diameter of 5 mm or more was measured.
【００２７】２）スランプフロー試験：水中不分離性コ
ンクリート設計施工指針（案）の土木学会基準「コンク
リートのスランプフロー試験方法（案）」に従って、ス
ランプコーンを引き抜き５分後に測定を行った。2) Slump flow test: According to the Japan Society of Civil Engineers standard "Slump flow test method for concrete (plan)" of the design / construction guidelines for underwater concrete (plan), the slump cone was pulled out and measured 5 minutes later.
【００２８】３）空気量試験：ＪＩＳ Ａ １１２８に
準じ測定を行った。3) Air amount test: Measurement was carried out according to JIS A 1128.
【００２９】４）表面張力測定：コンクリートの液相を
抽出し表面張力計（ペンダントドロップ法）により測定
した。4) Surface tension measurement: The liquid phase of concrete was extracted and measured by a surface tension meter (pendant drop method).
【００３０】５）耐凍害性：ＪＩＳ Ａ ６２０４の附
属書に準じ測定を行った。なお、値は、コンクリートの
凍結融解試験法による凍結融解サイクル、３００サイク
ル後の相対動弾性係数（％）で表した。5) Freezing damage resistance: Measured according to the appendix of JIS A 6204. The values are represented by the relative dynamic elastic modulus (%) after 300 cycles of freeze-thaw cycles according to the freeze-thaw test method of concrete.
【００３１】実施例１〜９、比較例１〜３ 表１にコンクリート組成物の基本配合を示した。また、
表２にこのコンクリート組成物に配合する界面活性剤の
種類を示した。各界面活性剤は、コンクリート組成物の
混練水の表面張力が、それぞれ表３に示した値になる量
配合させた。これらの材料の練り混ぜは、１００Ｌパン
型強制練りミキサを使用し、ミキサに材料を砕石＋砂(1
/2) ＋セメント（実施例５，６の場合微粉末粉体も同時
添加）＋水溶性高分子＋消泡剤＋砂(1/2)の順序で入
れ、３０秒間空練りを行った。続いて練り混ぜ水、減水
剤、界面活性剤を添加し１８０秒間練り混ぜた。得られ
た高流動性コンクリートについてその物性を表３に示し
た。Examples 1 to 9 and Comparative Examples 1 to 3 Table 1 shows the basic composition of concrete compositions. Also,
Table 2 shows the types of surfactants to be added to this concrete composition. Each of the surfactants was mixed in such an amount that the surface tension of the kneading water of the concrete composition became the value shown in Table 3, respectively. To knead these ingredients, use a 100-liter pan-type forced kneading mixer, and mix the ingredients into crushed stone + sand (1
/ 2) + cement (in the case of Examples 5 and 6, fine powder powder was also added simultaneously) + water-soluble polymer + defoaming agent + sand (1/2), and the mixture was kneaded for 30 seconds. Subsequently, kneading water, a water reducing agent, and a surfactant were added, and the mixture was kneaded for 180 seconds. The physical properties of the obtained high fluidity concrete are shown in Table 3.
【００３２】[0032]
【表１】 [Table 1]
【００３３】[0033]
【表２】 [Table 2]
【００３４】[0034]
【表３】 [Table 3]
Claims (2)
てなるコンクリート組成物であって、該混練水に表面張
力が２５〜４０ｄｙｎｅ／ｃｍになる量の界面活性剤が
含有されてなるコンクリート組成物。1. A concrete composition which is kneaded with water in which a water-soluble polymer is dissolved, wherein the kneading water contains a surfactant in an amount such that the surface tension becomes 25 to 40 dyne / cm. Composition.
請求項１記載のコンクリート組成物。2. The concrete composition according to claim 1, which has a slump flow value of 50 to 70 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05291496A JP3734300B2 (en) | 1996-03-11 | 1996-03-11 | Concrete composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05291496A JP3734300B2 (en) | 1996-03-11 | 1996-03-11 | Concrete composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09241064A true JPH09241064A (en) | 1997-09-16 |
| JP3734300B2 JP3734300B2 (en) | 2006-01-11 |
Family
ID=12928111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05291496A Expired - Lifetime JP3734300B2 (en) | 1996-03-11 | 1996-03-11 | Concrete composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3734300B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017114703A (en) * | 2015-12-22 | 2017-06-29 | 花王株式会社 | Surface appearance improver composition for hydraulic composition |
-
1996
- 1996-03-11 JP JP05291496A patent/JP3734300B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017114703A (en) * | 2015-12-22 | 2017-06-29 | 花王株式会社 | Surface appearance improver composition for hydraulic composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3734300B2 (en) | 2006-01-11 |
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