JP3130506B2 - Test method and tester for evaluation of filling property of high fluidity concrete - Google Patents
Test method and tester for evaluation of filling property of high fluidity concreteInfo
- Publication number
- JP3130506B2 JP3130506B2 JP10197214A JP19721498A JP3130506B2 JP 3130506 B2 JP3130506 B2 JP 3130506B2 JP 10197214 A JP10197214 A JP 10197214A JP 19721498 A JP19721498 A JP 19721498A JP 3130506 B2 JP3130506 B2 JP 3130506B2
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- short side
- side wall
- space
- container
- 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
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- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は高流動コンクリート
の充填性を定量的に評価する試験法および試験器に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a test method and a tester for quantitatively evaluating the filling property of highly fluid concrete.
【０００２】[0002]
【従来の技術】最近，自己充填性コンクリートの開発が
進み，各所で実用化されるようになった。自己充填性コ
ンクリートは，フレッシュな状態において十分な材料分
離抵抗性を有しながら変形性に優れ，バイブレータ等に
よる締め固めを行わずとも配筋された型枠内に密実に打
ち込むことができる性能を有するものである。このよう
な高流動コンクリートは，骨材の一部を石粉その他の粉
体で置換するとともに，適正な混和剤，例えば高性能Ａ
Ｅ減水剤と増粘剤を配合することによって得られる。2. Description of the Related Art Recently, the development of self-compacting concrete has progressed, and it has been put to practical use in various places. Self-compacting concrete has sufficient deformability in a fresh state while having sufficient resistance to material separation, and has the performance of being able to be firmly driven into a formwork laid out without compaction with a vibrator or the like. Have Such high-fluidity concrete replaces a part of the aggregate with stone powder or other powder, and also uses an appropriate admixture such as high-performance A
E It is obtained by blending a water reducing agent and a thickener.
【０００３】締め固め不要の高流動コンクリートの実際
の施工にあたっては，ポンプ圧送される該コンクリート
を配筋された型枠内に型枠上部から流下させる方法が採
られることが多いが，この場合には，該コンクリートは
配筋された型枠内を落下し，自重によって水平方向に流
動して鉄筋の間を通過し，そのさい，流動方向を前後・
左右・上下に必要に応じて変化しながら型枠内に充填さ
れるといった挙動をとる。この充填が良好に行われるか
否かは極めて重要であり，充填不良は許されない。した
がって，これから打設しようとする高流動コンクリート
が当該現場の状況に応じて確実に充填されるか否かを予
め知ることが必要である。すなわち，該コンクリートの
充填性能を把握しておかねばならない。[0003] In the actual construction of high-fluidity concrete that does not require compaction, a method is often adopted in which the concrete to be pumped is allowed to flow from the upper part of the formwork into the formwork where the reinforcement is arranged. At first, the concrete falls in the reinforced formwork, flows horizontally by its own weight, and passes between the reinforcing bars.
It takes the behavior of being filled into the formwork while changing as needed from side to side and up and down as needed. It is extremely important that this filling is performed well, and poor filling is not allowed. Therefore, it is necessary to know in advance whether or not the high-fluidity concrete to be poured is surely filled according to the situation at the site. That is, it is necessary to grasp the filling performance of the concrete.
【０００４】高流動コンクリートの充填性は，これまで
のところスランプフロー値とＶ漏斗流下速度によって主
として評価されてきた。また，Ｕ型充填性試験やボック
ス充填性試験なども提案されている。[0004] The filling properties of high-fluidity concrete have so far mainly been evaluated by the slump flow value and the V-funnel flow rate. In addition, a U-type filling test and a box filling test have been proposed.
【０００５】[0005]
【発明が解決しようとする課題】スランプフロー試験は
土木学会規準の試験であるが，自由表面が大きくて外部
からの拘束が小さい条件下における変形性を測定してい
るので，コンクリート打ち込み時における比較的障害物
の少ないところでの流動勾配や流動距離を評価するのに
適するが，例えば，鉄筋の間を通過する能力等は判定で
きない。したがって，同じスランプフロー値でも，配合
条件等によって鉄筋等の障害物を通過する能力が相違す
る場合もあり得る。The slump flow test is a test based on the standards of the Japan Society of Civil Engineers, but it measures the deformability under conditions where the free surface is large and the external restraint is small. It is suitable for evaluating the flow gradient and flow distance in places where there are few obstacles. However, for example, the ability to pass between reinforcing bars cannot be determined. Therefore, even with the same slump flow value, the ability to pass through an obstacle such as a reinforcing bar may differ depending on the blending conditions and the like.
【０００６】Ｖ漏斗流下速度の試験は，漏斗の断面変化
部におけるコンクリートの変形速度を測定して，コンク
リートの自己充填性に及ぼす性状の一部を評価しようと
するものであるが，もともとペーストやモルタル等の粘
性評価を行うことを主眼としたものであり，コンクリー
トの見かけの粘性を評価するには適している。しかしこ
の流下速度も，鉄筋の間を通過する能力等との対応性は
必ずしも明確ではなく同じ流下速度でも障害物を通過す
る能力が相違する場合もあり得る。The V-funnel flow velocity test is to measure the deformation rate of concrete at the section where the funnel changes in cross section, and to evaluate a part of the properties affecting the self-filling property of concrete. The main purpose is to evaluate the viscosity of mortar and the like, and it is suitable for evaluating the apparent viscosity of concrete. However, the correspondence between the flow speed and the ability to pass between the reinforcing bars is not always clear, and the ability to pass an obstacle may differ even at the same flow speed.
【０００７】Ｕ型充填性試験は，Ｕ型管の間に障害物を
想定した鉄筋を垂直方向に数本配し，Ｕ型管の片方の管
に投入したコンクリート高さと，鉄筋を通過して他方の
管に流れ込んだコンクリートの高さの差によって充填性
を評価するものであるが，鉄筋を通過する前後でのコン
クリートの圧力差が小さく，試験時の圧力が大ききすぎ
るという問題があり，また，コンクリートの流動先端部
の挙動を知るには必ずしも適さない。[0007] In the U-type filling test, several reinforcing bars are laid vertically between the U-shaped pipes assuming obstacles, and the concrete height in one of the U-shaped pipes and the passing of the reinforcing steel through the reinforcing bar. The filling property is evaluated based on the difference in the height of the concrete flowing into the other pipe. However, there is a problem that the pressure difference between the concrete before and after passing through the reinforcing bar is small, and the pressure during the test is too large. In addition, it is not always suitable to know the behavior of the tip of flowing concrete.
【０００８】ボックス充填性試験は，ボックス内に水平
方向にロッドを多数本張り渡し，ボックスの一方の端か
ら高流動コンクリートを投入した場合に，ロッドの間隙
を通過して他方の端に流れ着いたコンクリートの高さを
充填高さとして評価するものであり，実施工に近い状況
を観察できる。しかし，ロッド径や本数・間隙によって
充填高さが変化するので，それらを一定にしたものを用
いたとしても，どの高流動コンクリートでも充填性が定
量的に評価できるというものでもない。In the box filling test, many rods were stretched horizontally in the box, and when high-fluidity concrete was injected from one end of the box, it passed through the gap between the rods and reached the other end. The height of the concrete is evaluated as the filling height, and it is possible to observe a situation close to the actual work. However, since the filling height changes depending on the rod diameter, the number of rods, and the gap, the filling property cannot be quantitatively evaluated for any high-fluidity concrete, even if those are kept constant.
【０００９】したがって，本発明は，前記のような従来
の試験法に代えて，高流動コンクリートの充填性を定量
的に且つ簡易に計測できる試験法を提供し，高流動コン
クリートを用いた構造物の品質改善に役立てることを目
的とする。Accordingly, the present invention provides a test method capable of quantitatively and easily measuring the filling property of high-fluidity concrete in place of the conventional test method as described above, and provides a structure using high-fluidity concrete. The purpose is to help improve the quality of products.
【００１０】[0010]
【課題を解決するための手段】本発明は，相対する短辺
壁と相対する長辺壁とをもつ直方体容器内を短辺壁と平
行な複数の仕切板で容器底部から所定の間隙を開けて仕
切ることにより一方の短辺壁から他方の短辺壁の間に各
仕切板の下方で連通する複数の空間を形成し，一方の短
辺壁を側壁とする該空間の上方から高流動コンクリート
を流下させることにより，各仕切板の下方の開口を経て
他方の短辺壁を側壁とする該空間に向けて該コンクリー
トをその自重によって流動させ，コンクリートを流下さ
せた空間にコンクリートがほぼ充填されたときに他の空
間に存在するコンクリートの充填高さを計測することを
要旨とする高流動コンクリートの充填性評価試験法を提
供する。According to the present invention, a predetermined gap is opened from the bottom of a rectangular parallelepiped container having opposing short side walls and opposing long side walls with a plurality of partition plates parallel to the short side walls. A plurality of spaces communicating below each partition plate between one short side wall and the other short side wall by partitioning, and the high fluidity concrete is formed from above the space having one short side wall as a side wall. Of the concrete, the concrete flows under its own weight toward the space having the other short side wall as a side wall through the opening below each partition plate, and the space into which the concrete has flowed is almost filled with the concrete. The present invention provides a test method for evaluating the filling property of high-fluidity concrete, which is to measure the filling height of concrete existing in another space when the concrete is present.
【００１１】 より具体的には，相対する短辺壁と相対
する長辺壁とをもつ直方体容器内を，短辺壁と平行で且
つその下縁が水平な二つの仕切板で，容器底部からの両
者の下縁高さを等しくして両短辺壁の間を実質上３等分
することにより，一方の短辺壁から他方の短辺壁の間で
各仕切板の下方で連通した第１，第２および第３の空間
を形成してなる試験容器に，高流動コンクリートを，該
第１空間の上部から流下させ，該第１空間に流下した高
流動コンクリートをその自重によって各仕切板の下方の
開口を経て第２および第３の空間に向けて自然に流延さ
せ，第１空間にほぼ高流動コンクリートが充填されたと
きの第２空間および第３空間に存在するコンクリート充
填高さを計測すること，を特徴とする高流動コンクリー
トの充填性評価試験法である。More specifically, inside a rectangular parallelepiped container having opposing short side walls and opposing long side walls, two partitioning plates parallel to the short side walls and having a horizontal lower edge are formed from the bottom of the container. By making the lower edge heights of both of them equal and dividing the two short side walls into substantially three equal parts, the first lower side wall communicating from one short side wall to the other short side wall below each partition plate. The high-fluidity concrete is caused to flow from the upper part of the first space into the test container having the first, second and third spaces formed therein, and the high-fluidity concrete flowing down to the first space is separated by its own weight into each partition plate. Of the concrete filling existing in the second space and the third space when the first space is almost filled with the high-fluidity concrete. Of filling property of high fluidity concrete characterized by measuring Is the law.
【００１２】したがって本発明は，また，相対する短辺
壁と相対する長辺壁とをもつ直方体容器内を，短辺壁と
平行で且つその下縁が水平な二つの仕切板で，容器底部
からの両者の下縁高さを等しくして両短辺壁の間を実質
上３等分することにより，一方の短辺壁から他方の短辺
壁の間で各仕切板の下方で連通した第１，第２および第
３の空間を形成してなる高流動コンクリートの充填性評
価試験器を提供する。この直方体容器は，長辺の長さ：
短辺の長さ：高さの比が２：１：１およびこれに近い比
であり，容器底面から仕切板までの開口高さは容器高さ
の１／３およびこれに近い比とし，長辺は６００ｍｍま
たはこれに近い長さとするのが実際的である。[0012] Accordingly, the present invention also provides a rectangular parallelepiped container having opposed short side walls and opposed long side walls, by using two partition plates parallel to the short side walls and having a horizontal lower edge, and provided at the bottom of the container. The height of both lower edges is equal and the distance between the two short side walls is substantially divided into three, so that one short side wall communicates with the other short side wall below each partition plate. Provided is a tester for evaluating filling property of high-fluidity concrete, in which first, second and third spaces are formed. This rectangular container has a long side length:
The ratio of the length of the short side to the height is 2: 1: 1 or a ratio close to this, and the opening height from the container bottom to the partition plate is 1/3 of the container height or a ratio close to this. It is practical that the side has a length of 600 mm or a length close thereto.
【００１３】[0013]
【発明の実施の形態】高流動コンクリートを，締め固め
を行うことなく配筋した型枠内に打設する場合，流動先
端部が隅々まで流れついて行くことが必要であり，この
ためには，流動先端部での圧力伝達状況を知る必要があ
る。前記のＵ型充填性試験やボックス充填性試験では配
筋の隙間を流れる能力を評価することはできても，流動
先端部での圧力伝達の状況は定量化できない。この状況
を最も簡略に定量化する試験法として，本発明では，高
流動コンクリートの水平方向の流延距離と先端部の圧力
状況の関係を，流動通路に上堰（下部開口の仕切板）を
設けることによって評価する。このために，図１に示し
たような試験器を用いる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS When high-flowable concrete is poured into a formwork laid without compaction, it is necessary that the tip of the flow flows to every corner. It is necessary to know the pressure transmission status at the flow front. Although the U-type filling test and the box filling test described above can evaluate the ability to flow through the gaps in the reinforcing bars, the state of pressure transmission at the leading end of the flow cannot be quantified. As a test method for quantifying this situation in the simplest way, in the present invention, the relationship between the horizontal casting distance of high-fluidity concrete and the pressure condition at the tip is determined by using an upper weir (partition plate with a lower opening) in the flow passage. Evaluate by providing. For this purpose, a test device as shown in FIG. 1 is used.
【００１４】図１は，本発明に従う代表的な試験器を示
したもので，相対する短辺壁１ａ，１ｂと，相対する長
辺壁２ａ，２ｂとをもつ直方体容器３内を，短辺壁１
ａ，１ｂと平行な複数の仕切板４ａ，４ｂを用いて容器
底部から所定の間隙を開けて仕切ることにより一方の短
辺壁１ａから他方の短辺壁１ｂの間に各仕切板４の下方
で連通する複数の空間５ａ，５ｂ，５ｃを形成したもの
である。FIG. 1 shows a typical tester according to the present invention, in which a rectangular parallelepiped container 3 having opposing short side walls 1a, 1b and opposing long side walls 2a, 2b is provided with a short side. Wall 1
A plurality of partition plates 4a and 4b parallel to a and 1b are used to separate a predetermined gap from the bottom of the container so that a lower portion of each partition plate 4 is located between one short side wall 1a and the other short side wall 1b. A plurality of spaces 5a, 5b, 5c communicating with each other are formed.
【００１５】図示の例では，下縁が水平な二つの仕切板
４ａ，４ｂで，容器底部からの両者の下縁高さを等しく
して両短辺壁の間を実質上３等分することにより，一方
の短辺壁１ａから他方の短辺壁１ｂの間で各仕切板の下
方で連通した第１空間５ａ，第２空間５ｂおよび第３空
間５ｃの３空間が形成されており，器内のコンクリート
の流動状態が目視できるように，透明アクリル樹脂で構
成されている。なお，各仕切板４ａ，４ｂの下縁には，
板と直交する方向をもつフランジ６ａ，６ｂが取付けて
あるが，仕切板４の下縁においてこのフランジ６を水平
方向に板の両側に僅かに張り出させることによって，コ
ンクリートの巻き上がりを防止しながら流動方向への圧
力伝播を良好にすることができる。In the example shown in the figure, two lower partition walls 4a and 4b are used to equalize the height of the lower edges from the bottom of the container and substantially divide the two short side walls into three equal parts. Thus, three spaces of a first space 5a, a second space 5b, and a third space 5c communicating below each partition plate are formed between one short side wall 1a and the other short side wall 1b. It is made of transparent acrylic resin so that the flow state of the concrete inside can be seen visually. In addition, on the lower edge of each partition plate 4a, 4b,
Although flanges 6a and 6b having a direction perpendicular to the plate are attached, the flange 6 is slightly extended horizontally on both sides of the plate at the lower edge of the partition plate 4 to prevent the concrete from rolling up. However, it is possible to improve the pressure propagation in the flow direction.
【００１６】 測定操作は，第１空間５ａの上方から高
流動コンクリートを流下させ，各仕切板の下方の開口を
経て第３空間５ｃに向けて該コンクリートをその自重に
よって流動させ，第１空間５ａにコンクリートがほぼ充
填されたときの第２空間５ｂおよび第３空間５ｃに存在
するコンクリートの充填高さを計測する。第１空間５ａ
にコンクリートを投入するさいには，所定の時間をおい
て定量づつ回分式に投入する方法を採用するのがよい。
また，充填高さは短辺壁１ａ，１ｂでのコンクリートレ
ベルと，各仕切板の両面でのコンクリートレベルを計測
する。In the measurement operation, the highly fluid concrete is caused to flow down from above the first space 5a, and the concrete is caused to flow by its own weight toward the third space 5c through the opening below each partition plate. concrete measures the filling height of the concrete present in the second space 5b and the third space 5c when it is almost filled in. First space 5a
When concrete is poured into concrete, it is advisable to adopt a method in which batching is carried out at predetermined intervals after a predetermined time.
The filling height is measured by measuring the concrete level on the short side walls 1a and 1b and the concrete level on both sides of each partition plate.
【００１７】そのさい，図２に示すような寸法としてコ
ンクリートの流動距離（短辺壁１ａと１ｂとの間の距
離）を６００ｍｍ程度とし，第１空間５ａにコンクリー
トを投入するさいに，５秒間に約１リットルづつ回分式
に流し込むという操作を行うこのが望ましい。これによ
り，コンクリートに作用する圧力が小さくなり，実施工
での流動先端部の圧力伝達の状況が前記の充填高さに再
現できる。At this time, the flow distance of the concrete (the distance between the short side walls 1a and 1b) is set to about 600 mm as shown in FIG. 2, and the concrete is put into the first space 5a for 5 seconds. This operation is preferably performed in such a manner that about 1 liter is poured in batches. As a result, the pressure acting on the concrete is reduced, and the state of pressure transmission at the leading end of the flow at the time of execution can be reproduced at the above-described filling height.
【００１８】この試験において，各仕切板４は圧力伝達
の障害物となるものであり，この障害物の下をくぐり抜
けて流動してゆくコンクリートの挙動は実構造物での挙
動を良く再現することができる。In this test, each partition plate 4 is an obstacle to pressure transmission, and the behavior of concrete flowing under the obstacle and flowing under the obstacle is to reproduce the behavior of an actual structure well. Can be.
【００１９】充填性の評価は，図２に示すように，両壁
と仕切板両面位置Ａ，Ｂ・・Ｆでのコンクリートレベル
の計測値をもって行うことができるが，さらにＡレベル
とＦレベルの計測値の差，或いは各計測値から算出され
る各空間中の充填容積率でも行うことができ，これらか
ら自己充填性を定量的に表現することができる。As shown in FIG. 2, the evaluation of the filling property can be carried out based on the measured values of the concrete levels at the positions A, B,... F on both sides of the wall and the partition plate. The self-filling property can be quantitatively expressed based on the difference between the measured values or the filling volume ratio in each space calculated from each measured value.
【００２０】スランプフロー値やロート試験での流下速
度がほぼ同等でも配合が異なる高流動コンクリートで
は，自己充填性能に差異が生じることがあるが，本発明
者らの数多くの試験によると，図２の寸法形状の試験器
を用いて本発明に従う充填性評価を行うと，自己充填性
の差異を定量的に検知できることがわかった。[0020] In the case of high-fluidity concrete with a different composition even though the slump flow value and the flow velocity in the funnel test are almost the same, a difference may occur in the self-filling performance. However, according to many tests by the present inventors, FIG. It was found that when the filling property was evaluated according to the present invention using a tester having the following shape and shape, the difference in the self-filling property could be quantitatively detected.
【００２１】以下に，その試験の代表例を挙げる。 〔試験１〕表１に示す配合のＮo.１，Ｎo.２およびＮo.
３の高流動コンクリートについて，それぞれスランプフ
ロー試験，Ｖロート試験および図２の寸法の本発明試験
器による充填高さの測定を行ない，それらの結果を表２
に示した。供試した高流動コンクリートＮo.１のもの
は，石灰石の微粉末を２８３kg/m3 とした粉体系高流動
コンクリート，Ｎo.２のものはＮo.１に増粘剤を加えた
併用系高流動コンクリート，Ｎo.３のものはＮo.２の微
粉末の一部を細骨材で置換した併用系高流動コンクリー
トである。The following are representative examples of the test. [Test 1] No. 1, No. 2 and No. of the formulations shown in Table 1.
For the high fluidity concrete of No. 3, a slump flow test, a V funnel test and a filling height measurement using the tester of the present invention having the dimensions shown in FIG. 2 were performed, and the results are shown in Table 2.
It was shown to. The high fluidity concrete No. 1 tested was a powder type high fluidity concrete with a fine limestone powder of 283 kg / m 3, and the No. 2 high fluidity concrete with a thickener added to No. 1 Concrete No. 3 is a combined high fluidity concrete in which a part of fine powder of No. 2 is replaced with fine aggregate.
【００２２】[0022]
【表１】 [Table 1]
【００２３】[0023]
【表２】 [Table 2]
【００２４】表２の結果に見られるように，これらのコ
ンクリートのスランプフロー値はＮo.１とＮo.２は７
２.８ｃｍ，７２.０ｃｍとほぼ同等，Ｎo.３のものは７
０.８ｃｍとやや低いがいずれも同程度の値を示した。
また，Ｖロート試験では，流下時間はＮo.１＞Ｎo.２＞
Ｎo.３の順である。As can be seen from the results in Table 2, the slump flow values of these concretes were 7 for No. 1 and 7 for No. 2.
2.8 cm, almost equivalent to 72.0 cm, No. 3 is 7
Although slightly lower than 0.8 cm, the values were almost the same.
In the V funnel test, the flow time was No.1>No.2>
No. 3 in that order.
【００２５】ところが，本発明による充填性評価試験で
は，表２および図３のＡ〜Ｆの充填高さおよびＡ−Ｆの
高低差に見られるように，Ｎo.２のものが最も良好な充
填性を示し，次いでＮo.３のもの，Ｎo.１のものは最も
充填性が悪く，充填性評価はＮo.2 ＞Ｎo.３＞Ｎo.１の
順となった。なお，この充填性試験は，図２の寸法の試
験器に５秒間に約１リットルづつ回分式に投入する操作
で行ったものであり，各コンクリートの流動状況は次の
とおりであった。However, in the filling evaluation test according to the present invention, as shown in the filling heights of A to F and the height difference of A to F in Table 2 and FIG. Next, No. 3 and No. 1 showed the worst filling property, and the filling property was evaluated in the order of No. 2> No. 3> No. The filling test was conducted by batchwise charging about 1 liter into a tester having the dimensions shown in FIG. 2 for 5 seconds. The flow condition of each concrete was as follows.
【００２６】Ｎo.１の高流動コンクリートの流動状況：
流動先端部では，下から２ｃｍ程度までは粗骨材が運ば
れていたが，その上はモルタル分のみであり，材料分離
が生じていた。また流動先端部下方の粗骨材が多い部分
は硬くなっており，流動性が損なわれていた。全量投入
後にＡ〜Ｂ区間に圧力を加えたが，Ｃ〜Ｄ区間及びＥ〜
Ｆ区間のコンクリートは全く動かず，圧力伝播が損なわ
れていた。したがって，この高流動コンクリートはスラ
ンプフロー値，空気量とも目標品質を満足するものでは
あるが材料分離が生じて充填性に問題があると評価され
た。なお，Ｖロート流下時間については，材料分離が生
じていたにもかかわらず，５分静置後も同様の値であっ
た。これは，試料のサンプリングに問題があるからであ
ろうと考えられる。Flow condition of No. 1 high fluidity concrete:
At the tip of the flow, coarse aggregate was transported up to about 2 cm from the bottom, but only the mortar was on the top, causing material separation. In addition, the portion with a large amount of coarse aggregate below the tip of the flow was hard and the fluidity was impaired. Pressure was applied to sections A and B after the entire amount was charged, but sections C to D and E to
The concrete in section F did not move at all and the pressure propagation was impaired. Therefore, although this high-fluidity concrete satisfies the target quality in both the slump flow value and the air volume, it was evaluated that material separation occurred and there was a problem in filling property. It should be noted that the V funnel falling time was the same value even after standing for 5 minutes even though material separation had occurred. This is probably because there is a problem in sampling the sample.
【００２７】Ｎo.２の高流動コンクリートの流動状況：
Ａ−Ｆの高低差は５ｍｍであり，各空間にフラットにコ
ンクリートが充填された。流動先端部の粗骨材分布状況
もほぼ均一であった。全量投入後にＡ〜Ｂ区間に圧力を
加えるとＣ〜Ｄ区間およびＥ〜Ｆ区間のコンクリートが
均一に押し上げられ，圧力伝播能力に優れていることが
確認された。また各空間のコンクリート表面部にはノロ
状のものは生じていなかった。したがって，この高流動
コンクリートはスランプフロー値，空気量とも目標品質
を満足し且つ材料分離も生じないものであり，充填性に
優れるものであると評価された。なお，Ｖロート流下時
間は，試料投入後直後と５分静置後のものの差はほとん
どなかった。Flow condition of No. 2 high fluidity concrete:
The height difference between A and F was 5 mm, and each space was flatly filled with concrete. The distribution of coarse aggregate at the flow front was also almost uniform. When pressure was applied to sections A and B after the entire amount was charged, concrete in sections C to D and EF was evenly pushed up, and it was confirmed that the concrete had excellent pressure propagation ability. No slag was found on the concrete surface of each space. Therefore, this high-fluidity concrete was evaluated as satisfying the target quality in both the slump flow value and the air amount, without causing material separation, and having excellent fillability. In addition, there was almost no difference in the flow time of the V funnel between immediately after the introduction of the sample and after 5 minutes of standing.
【００２８】Ｎo.３の高流動コンクリートの流動状況：
Ａ−Ｆの高低差は１５ｍｍであり，Ｎo.２よりもやや大
きな値を示したが，流動先端部の粗骨材の分布も比較的
均一であり，材料分離は生じておらず，コンクリートの
性状は良好であった。全量投入後にＡ〜Ｂ区間に圧力を
加えるとＣ〜Ｄ区間が押上られ，次いでＥ〜Ｆ区間が押
し上げられた。Ｅ〜Ｆ間については圧力伝播が若干損な
われる程度であった。したがって，この高流動コンクリ
ートはスランプフロー値，空気量とも目標品質を満足し
且つ材料分離も殆んど生じないものであり，充填性に優
れるものであると評価された。なお，Ｖロート流下時間
は試料投入後直後と５分静置後のものの差はほとんどな
かった。Flow condition of high fluidity concrete of No.3:
The height difference between A and F was 15 mm, which was slightly larger than that of No. 2. However, the distribution of coarse aggregate at the tip of the flow was relatively uniform, and material separation did not occur. The properties were good. When pressure was applied to sections A and B after the entire amount was charged, sections C to D were pushed up, and then sections E to F were pushed up. Between E and F, the pressure propagation was slightly impaired. Therefore, the high fluidity concrete was evaluated as satisfying the target quality in both slump flow value and air amount, hardly causing material separation, and being excellent in fillability. In addition, there was almost no difference in the flow time of the V funnel between the time immediately after the introduction of the sample and the time after standing for 5 minutes.
【００２９】[0029]
【発明の効果】以上説明したように，本発明によると，
高流動コンクリートの充填性を定量的に評価できる。ス
ランプフロー値や空気量等が目標値を有する高流動コン
クリートでも，実施工においては自己充填性能を示さな
い場合があるが，本発明によればその充填性が定量的に
評価できるので，高流動コンクリートの実施工および高
流動コンクリートの配合設計に貢献できる。しかも，本
発明に従う試験器とその試験操作は非常に簡易であり，
現場的にも実施しやすい。As described above, according to the present invention,
It can quantitatively evaluate the filling properties of high fluidity concrete. Even in the case of high-fluidity concrete with slump flow value, air volume, etc. having target values, self-filling performance may not be exhibited in the execution work, but according to the present invention, the filling property can be quantitatively evaluated. It can contribute to concrete implementation and high fluidity concrete mix design. Moreover, the tester according to the present invention and its test operation are very simple,
Easy to implement on site.
【図１】本発明に従う高流動コンクリートの試験器の代
表例を示す斜視図である。FIG. 1 is a perspective view showing a representative example of a high-fluidity concrete tester according to the present invention.
【図２】本発明に従う高流動コンクリートの試験器の代
表的な寸法を示す図１と同様の図である。FIG. 2 is a view similar to FIG. 1 showing representative dimensions of a tester for high fluidity concrete according to the present invention.
【図３】スランプフロー値がほぼ同じ高流動コンクリー
ト３種に対して本発明の試験法を実施したときの流動状
況を示す図である。FIG. 3 is a view showing a flow state when the test method of the present invention is applied to three types of high fluidity concrete having almost the same slump flow value.
１ａ，１ｂ 短辺壁 ２ａ，２ｂ 長辺壁 ３ 試験器 ４ａ，４ｂ 仕切板 ５ａ 第１空間 ５ｂ 第２空間 ５ｃ 第３空間 ６ａ，６ｂ 仕切板下縁のフランジ 1a, 1b Short side wall 2a, 2b Long side wall 3 Tester 4a, 4b Partition plate 5a First space 5b Second space 5c Third space 6a, 6b Flange at lower edge of partition plate
───────────────────────────────────────────────────── フロントページの続き (72)発明者 信田 佳延 東京都調布市飛田給二丁目19番１号 鹿 島建設株式会社技術研究所内 (56)参考文献 特開 平６−206748（ＪＰ，Ａ) 特開 平４−27840（ＪＰ，Ａ) 特開 平４−220543（ＪＰ，Ａ) 鈴木忠彦，“高流動コンクリート試験 方法”，建築技術，株式会社建築技術, 1996年，Ｎｏ．553，ｐｐ．90−93 (58)調査した分野(Int.Cl.7，ＤＢ名) G01N 11/00 - 11/08 G01F 23/00 G01N 33/38 C04B 28/00 - 28/36 ＪＩＣＳＴファイル（ＪＯＩＳ)────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshinobu Shinda 2-9-1-1, Tobita-shi, Chofu-shi, Tokyo Kashima Construction Co., Ltd. Technical Research Institute (56) References JP-A-6-206748 (JP, A) JP-A-4-27840 (JP, A) JP-A-4-220543 (JP, A) Suzuki Tadahiko, "High-fluidity concrete test method", Building Technology, Building Technology Co., Ltd., 1996 553, p. 90-93 (58) Field surveyed (Int. Cl. 7 , DB name) G01N 11/00-11/08 G01F 23/00 G01N 33/38 C04B 28/00-28/36 JICST file (JOIS)
Claims (7)
つ直方体容器内を短辺壁と平行な複数の仕切板で容器底
部から所定の間隙を開けて仕切ることにより一方の短辺
壁から他方の短辺壁の間に各仕切板の下方で連通する複
数の空間を形成し，一方の短辺壁を側壁とする該空間の
上方から高流動コンクリートを流下させることにより，
各仕切板の下方の開口を経て他方の短辺壁を側壁とする
該空間に向けて該コンクリートをその自重によって流動
させ，コンクリートを流下させた空間にコンクリートが
ほぼ充填されたときの他の空間に存在するコンクリート
の充填高さを計測する高流動コンクリートの充填性評価
試験法。1. A rectangular parallelepiped container having an opposite short side wall and an opposite long side wall is partitioned by a plurality of partition plates parallel to the short side wall with a predetermined gap from the container bottom to form one short side. By forming a plurality of spaces communicating below each partition plate between the wall and the other short side wall, and flowing the high-fluidity concrete from above the space having one short side wall as a side wall,
The concrete flows under its own weight toward the space having the other short side wall as a side wall through the opening below each partition plate, and the other space when the concrete into which the concrete has flowed down is almost filled with concrete. Of filling property of high fluidity concrete, which measures the filling height of concrete existing in concrete.
つ直方体容器内を，短辺壁と平行で且つその下縁が水平
な二つの仕切板で，容器底部からの両者の下縁高さを等
しくして両短辺壁の間を実質上３等分することにより，
一方の短辺壁から他方の短辺壁の間で各仕切板の下方で
連通した第１，第２および第３の空間を形成してなる試
験容器に，高流動コンクリートを，該第１空間の上部か
ら流下させ， 該第１空間に流下した高流動コンクリートをその自重に
よって各仕切板の下方の開口を経て第２および第３の空
間に向けて自然に流延させ， 第１空間にほぼ高流動コンクリートが充填されたときの
第２空間および第３空間に存在するコンクリート充填高
さを計測すること， を特徴とする高流動コンクリートの充填性評価試験法。2. Inside a rectangular parallelepiped container having opposing short side walls and opposing long side walls, two partitioning plates parallel to the short side walls and having a horizontal lower edge are provided below the container from the container bottom. By making the height of the edges equal and dividing the two short side walls into three equal parts,
The high-fluidity concrete is placed in a test container having first, second, and third spaces communicating below each partition plate between one short side wall and the other short side wall. The high-fluidity concrete that has flowed down from the upper part of the first space is spontaneously cast toward the second and third spaces through the lower openings of the partition plates by its own weight, and almost flows into the first space. Measuring the filling height of the concrete existing in the second space and the third space when the high-fluidity concrete is filled;
に第１空間に流下させる請求項２に記載の充填性評価試
験法。3. The test method for evaluating filling properties according to claim 2 , wherein the high-fluidity concrete is caused to flow into the first space in a batch manner in a fixed amount.
の短辺壁と他方の短辺壁のコンクリートレベルおよび各
仕切板の両面でのコンクリートレベルを計測する請求項
２または３に記載の充填性評価試験法。4. The filling height according to claim 2, wherein the filling height of the high-fluidity concrete is determined by measuring the concrete level on one short side wall and the other short side wall and the concrete level on both surfaces of each partition plate. Sex evaluation test method.
つ直方体容器内を，短辺壁と平行で且つその下縁が水平
な二つの仕切板で，容器底部からの両者の下縁高さを等
しくして両短辺壁の間を実質上３等分することにより，
一方の短辺壁から他方の短辺壁の間で各仕切板の下方で
連通した第１，第２および第３の空間を形成してなる高
流動コンクリートの充填性評価試験器。5. Inside a rectangular parallelepiped container having opposing short side walls and opposing long side walls, two partition plates parallel to the short side walls and having a horizontal lower edge are provided below the container from the container bottom. By making the height of the edges equal and dividing the two short side walls into three equal parts,
A tester for evaluating the filling property of high-fluidity concrete, wherein first, second and third spaces communicating below each partition plate are formed between one short side wall and the other short side wall.
さ：高さの比が２：１：１およびこれに近い比であり，
容器底面から仕切板までの開口高さは容器高さの１／３
およびこれに近い比である請求項５に記載の試験器。6. The rectangular parallelepiped container has a ratio of the length of the long side: the length of the short side: height of 2: 1: 1 or a ratio close thereto.
The opening height from the container bottom to the partition plate is 1/3 of the container height
The tester according to claim 5, wherein the ratio is close to the above.
である請求項６に記載の試験器。7. The tester according to claim 6, wherein the long side is 600 mm or a length close thereto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10197214A JP3130506B2 (en) | 1998-07-13 | 1998-07-13 | Test method and tester for evaluation of filling property of high fluidity concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10197214A JP3130506B2 (en) | 1998-07-13 | 1998-07-13 | Test method and tester for evaluation of filling property of high fluidity concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000027437A JP2000027437A (en) | 2000-01-25 |
| JP3130506B2 true JP3130506B2 (en) | 2001-01-31 |
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| JP2008285843A (en) * | 2007-05-16 | 2008-11-27 | East Nippon Expressway Co Ltd | Construction method for tunnel lining concrete |
| JP5354428B2 (en) * | 2010-12-06 | 2013-11-27 | 三菱マテリアル株式会社 | Method for evaluating fluidity of concrete |
| CN106769405A (en) * | 2016-12-13 | 2017-05-31 | 华北科技学院 | A kind of vertical demarcation strip and Geotechnical Engineering multifunction test system |
| JP6860364B2 (en) * | 2017-01-27 | 2021-04-14 | 株式会社フローリック | Consistency test method for cement composition |
| NL2030581B1 (en) * | 2022-01-17 | 2023-07-25 | Univ Changsha | Gap fluidity test device for filling mortar |
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1998
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Non-Patent Citations (1)
| Title |
|---|
| 鈴木忠彦，"高流動コンクリート試験方法"，建築技術，株式会社建築技術，１９９６年，Ｎｏ．５５３，ｐｐ．９０−９３ |
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