JPH0468163A - Construction of dense and thick concrete floor face - Google Patents
Construction of dense and thick concrete floor faceInfo
- Publication number
- JPH0468163A JPH0468163A JP17916590A JP17916590A JPH0468163A JP H0468163 A JPH0468163 A JP H0468163A JP 17916590 A JP17916590 A JP 17916590A JP 17916590 A JP17916590 A JP 17916590A JP H0468163 A JPH0468163 A JP H0468163A
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- water
- cement ratio
- mortar
- added
- 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
- 238000010276 construction Methods 0.000 title claims description 6
- 239000004568 cement Substances 0.000 claims abstract description 37
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- 238000003825 pressing Methods 0.000 claims abstract description 6
- 238000009489 vacuum treatment Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 description 15
- 239000000843 powder Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、耐摩耗性の高いコンクリート床面が要求さ
れる工場、流通センター、駐車場等の床に用いられるち
密層の厚いコンクリート床面の施工方法に関するもので
ある。[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to thick concrete floors with a dense layer used for floors of factories, distribution centers, parking lots, etc. where concrete floors with high wear resistance are required. This relates to construction methods.
従来、水セメント比が１５％〜２３％の流動性を有しな
いコンクリートを型枠内に打設し、その上から超音波振
動体で押圧し、その表面に５ｍｍ程度の厚さのち密層を
形成させるようにしたち密なコンクリート表面の製造方
法が知られている（特開昭６４−４．４７０５号公報参
照）。Conventionally, non-fluid concrete with a water-cement ratio of 15% to 23% is placed in a formwork, and then pressed with an ultrasonic vibrator to form a dense layer on the surface of the concrete with a thickness of about 5 mm. A method for producing a dense concrete surface is known (see Japanese Patent Laid-Open No. 64-4.4705).
前記従来の方法においては、ち密層を形成させるコンク
リートはその水セメント比が１５％〜２３％ときわめて
水分の少ない流動性を有しないものであるため建築物等
の構築作業においてコンクリ−１−ポンプでコンクリー
トを打設することば不可能であった。In the conventional method, the concrete used to form a dense layer has a water-cement ratio of 15% to 23%, which is extremely low in moisture and has no fluidity. It was literally impossible to pour concrete.
そのため水セメント比を４５％程度に大にしてコンクリ
ートポンプで圧送可能の状態として打設すると水セメン
ト比を２３％以下にするには夏期で８時間、冬期で１４
４時間程放置して置く必要があるが、打設後２時間以上
放置するとち密層の厚さが５ｎｏｎ以下となり厚さの厚
いち密層が得られない問題点があった。Therefore, if the water-cement ratio is increased to about 45% and the concrete is placed in a condition that can be pumped by a concrete pump, it takes 8 hours in summer and 14 hours in winter to reduce the water-cement ratio to 23% or less.
It is necessary to leave it for about 4 hours, but if it is left for more than 2 hours after pouring, the thickness of the dense layer becomes less than 5non, and there is a problem that a thick dense layer cannot be obtained.
この発明は、前期の問題点を克服し、水セメント比４５
％程度の流動性のあるコンクリ−１・を打設しても１５
ｍｍ〜２０ｍｍ程度の厚さの厚いち密層を有するコンク
リート床面を得ることができる施工方法を提供すること
を課題とするものである。This invention overcomes the problems of the previous stage and has a water-cement ratio of 45.
Even if concrete with a fluidity of about 1.5% is poured,
An object of the present invention is to provide a construction method capable of obtaining a concrete floor surface having a thick dense layer with a thickness of approximately 20 mm to 20 mm.
前期の課題を解決するためこの発明は、コンクリートポ
ンプで打設できる程度の流動性を有するように流動化剤
を添加した３８％程度の水セメント比のコンクリートが
２時間程度凝結しないように遅延剤を添加したコンクリ
ートを床面に打設する第１工程、コンクリート表面から
真空処理を行うとともに表面振動機で加振して吸水し水
セメント比を３０％程度とする第２工程、コンクリート
表面に水セメント比Ｏ％〜１５％程度のモルタルを散布
する第３工程、表面に水分を移動させ、水セメント比が
２３％程度となり、かつモルタルとベースコンクリート
が接着するようにコンクリート表面にＯ，］、 ｋｇ
／ ｃｒＭ程度の弱い加圧力で超音波振動を加える第４
工程、コンクリート表面に表面およびベースコンクリー
ト部分まで締め固まるようにｌ ｋｇ ／ ａｎｔ程度
の強い加圧力で超音波振動を加える第５工程からなるち
密層の厚いコンクリート床面の施工方法の手段を講じる
ものである。In order to solve the problems of the previous stage, this invention has added a fluidizing agent so that it has enough fluidity to be cast with a concrete pump.A retardant is added to prevent concrete with a water-cement ratio of about 38% from setting for about 2 hours. The first step is to pour concrete to the floor surface.The second step is to perform vacuum treatment on the concrete surface and absorb water by shaking it with a surface vibrator to make the water-to-cement ratio about 30%. The third step is to spread mortar with a cement ratio of about 0% to 15%, move moisture to the surface, and apply O to the concrete surface so that the water-cement ratio becomes about 23% and the mortar and base concrete bond together. kg
/ 4th to apply ultrasonic vibration with a weak pressing force of about crM
This method takes measures to construct a concrete floor surface with a dense layer, which consists of the fifth step of applying ultrasonic vibrations to the concrete surface with a strong pressure of about 1 kg/ant so that the concrete surface and the base concrete part are compacted. It is.
この発明の作用について実施例を参照して説明する。 The operation of this invention will be explained with reference to embodiments.
床面に打設されるコンクリートの水セメン１〜比は３８
％程度のものが用いられるが、流動化剤が添加されてい
るので水セメント比４５％と同等の流動性を有しており
、コンクリートポンプを使用し配筋した床面の隅々に行
き渡るようにコンクリートを打設することができる。The water cement ratio of concrete poured on the floor is 38
%, but because a fluidizing agent is added, it has the same fluidity as a water-cement ratio of 45%, and a concrete pump is used to distribute it to every corner of the reinforced floor. Concrete can be placed in the area.
真空処理による吸水でコンクリートの水分の約１５％が
除かれるためコンクリートの水セメント比は３２％とな
るが、まだ水分が多過ぎるため、表面振動機によって水
分を表面に浮上させた状態で真空処理することにより、
水セメント比は３０％となる。その結果、コンクリ−１
・表面は１ｋｇ／ｄ程度の圧力を支えられるようになる
が、遅延剤が添加されているのでコンクリートは硬化し
ない状態を保持している。Approximately 15% of the moisture in the concrete is removed by water absorption during vacuum treatment, resulting in a water-cement ratio of 32%, but since there is still too much moisture, vacuum treatment is carried out with the moisture floating to the surface using a surface vibrator. By doing so,
The water-cement ratio will be 30%. As a result, concrete 1
・The surface will be able to support a pressure of about 1 kg/d, but since a retarder is added, the concrete will remain unhardened.
この状態のコンクリート表面に粉末または水セメント比
がθ％〜１５％程度の水セメン１〜比の極めて低いモル
タルを散布した後、超音波振動子を軽い圧力で押し当て
る最初の加振では、水セメント比を２３％程度とすると
同時に表面を締め固めベースコンクリートとの接着を強
化する作用を及ぼし、加振圧力を強くした次の加振では
コンクリート表面だけでなくベースコンクリートまで締
め固められ一体化した厚さの厚いち密層が形成される。After spraying powder or mortar with a water-cement ratio of about θ% to 15% and a very low water-cement ratio on the concrete surface in this state, the first vibration in which an ultrasonic vibrator is pressed with light pressure At the same time, the cement ratio was set to about 23%, which had the effect of compacting the surface and strengthening the bond with the base concrete.The next vibration, which increased the vibration pressure, compacted and integrated not only the concrete surface but also the base concrete. A thick dense layer is formed.
ち密層の厚さを厚く形成できるのは第１図に示すように
、水セメント比が２０％〜２３％の間であり、かつ第２
図に示すようにコンクリート打設後、約２時間以内であ
るが、前期超音波の加振時のコンクリート表面近辺の水
セメント比は２３％であり、かつコンクリートの打設後
２時間以内に行うようにするので、］、５ｍｍ〜２０＋
ｎｍという厚さの厚いち密層を得ることができるもので
ある。As shown in Figure 1, the dense layer can be formed thickly when the water-cement ratio is between 20% and 23%, and when the
As shown in the figure, the water-cement ratio near the concrete surface during the first stage of ultrasonic vibration was 23%, and it was performed within about 2 hours after concrete was poured. ], 5mm ~ 20+
A thick dense layer with a thickness of nm can be obtained.
型枠内に次表に示す水セメント比３８％のコンクリート
を５．５ ｃｍの厚さに流し込んだ。Concrete having a water-cement ratio of 38% as shown in the following table was poured into the formwork to a thickness of 5.5 cm.
単位量 ｋｇ／イ
註１ 粗骨材の径：２０ｍｍ
註２ 流動化剤 ：ハイフルード（商品名）註３ 遅延
剤 ：パリソクＴ（商品名）つぎに、コンクリート表
面にフィルタークロスを被せその上に孔明き板を介して
枠で覆い真空ポンプを用いて真空度５００ｍｍＨｇ （
０，３４気圧）で１１分間表面の水を吸引し、水セメン
ト比を３２％とし、続いて孔明き板の上から表面振動機
で３分毎に５秒間加振し水分を浮上させた状態で吸引す
る操作を３回繰返して水セメント比３０％とした。Unit amount kg/Note 1 Diameter of coarse aggregate: 20 mm Note 2 Glidifier: Hyfluid (trade name) Note 3 Retardant: Parisok T (trade name) Next, cover the concrete surface with a filter cloth and place it on top of it. Cover with a frame through a perforated plate and use a vacuum pump to create a vacuum of 500 mmHg (
0.34 atm) for 11 minutes to make the water-cement ratio 32%, and then vibrated from above the perforated plate with a surface vibrator for 5 seconds every 3 minutes to bring the water to the surface. The suction operation was repeated three times to obtain a water-cement ratio of 30%.
つぎに、セメントと砂の重量比１ ： ２（１：１．６
〜２．２の範囲で適宜使用できる）のモルタル粉末をコ
ンクリート表面に１５ｋｇ／ｒｒｒの量を散布した後、
超音波振動体を振幅１１μｍ、振動数１９，５ＫＨｚ、
加振圧力０．１ｋｇ／ｃｎＴ、移動速度１０ｍ／ｍｉｎ
でコンクリート表面に軽く押し当てながら移動させて水
セメント比を２３％とした後、この超音波振動体を加振
圧力１ ｋｇ ／ ｃＪとし強く押し当てながら同じ速
度で移動させることにより厚さ２０ｍｍのち密層を形成
させた。なお、前期のモルタル粉末はモルタルの散布量
の多少と超音波加振の回数によって水セメント比を０％
〜１５％のモルタルとすることができる。Next, the weight ratio of cement and sand is 1:2 (1:1.6
After scattering 15 kg/rrr of mortar powder (which can be used as appropriate within the range of ~2.2) on the concrete surface,
The ultrasonic vibrator had an amplitude of 11 μm and a frequency of 19.5 KHz.
Excitation pressure 0.1kg/cnT, moving speed 10m/min
The ultrasonic vibrator was pressed lightly against the concrete surface while moving to make the water-cement ratio 23%, and then the ultrasonic vibrator was moved at the same speed while pressing strongly at an excitation pressure of 1 kg/cJ to create a 20 mm thick concrete. A dense layer was formed. In addition, the water-cement ratio of the mortar powder in the previous period may be 0% depending on the amount of mortar sprinkled and the number of ultrasonic vibrations.
~15% mortar.
ごのち密層の圧縮強度は１，０００ ｋｇ／ｃｎＴ以上
であり、耐摩耗性はごて仕上げのモルタルに比べて摩耗
量は約１／２に減少した。The compressive strength of the troweled dense layer was 1,000 kg/cnT or more, and the amount of wear was reduced to about 1/2 compared to mortar finished with a trowel.
従来、コンクリートポンプで打設できる流動性を有する
コンクリートでは１ｍｍ〜５ｍｍ程度の厚さの薄いち密
層しか得られなかったが、この発明はこれと同様の流動
性を有するコンクリートを使用するにもかかわらず１５
ｍｍ〜２０ｍ＋ｎの厚いち密層が得られるので耐摩耗性
を要求される広い床面積の工場、駐車場等の建設にきわ
めて好適であり、また超音波加振後のコンクリート表面
は低水セメント比であるとともにち密層を形成し硬いの
で墨出しなどの軽作業を即時に行うことができ次工程を
早期に実施でき、表層のモルタルはベースコンクリート
と一体化しているので剥離の心配がない。Conventionally, concrete with fluidity that can be poured with a concrete pump could only produce a thin dense layer with a thickness of about 1 mm to 5 mm, but this invention uses concrete with similar fluidity. Zu15
Since a thick dense layer of mm to 20m+n can be obtained, it is extremely suitable for the construction of factories, parking lots, etc. with large floor areas that require wear resistance, and the concrete surface after ultrasonic vibration has a low water-to-cement ratio. Because it forms a dense layer and is hard, light work such as marking can be done immediately, and the next process can be carried out quickly.The mortar on the surface layer is integrated with the base concrete, so there is no need to worry about it peeling off.
第１図および第２図はそれぞれグラフである。 代理人 弁理士 坂 井 清 1 and 2 are graphs, respectively. Agent Patent Attorney Kiyoshi Sakai
Claims (1)
うに流動化剤を添加した低水セメント比のコンクリート
を床面に打設し、その表面から真空により吸水した後、
水セメント比０％〜１５％程度のモルタルを散布して水
セメント比を２３％程度とし、その表面に水分が移動し
、モルタルとベースコンクリートが接着し、ち密層が形
成されるようにコンクリート打設時から２時間以内に超
音波振動を加えるようにしたち密層の厚いコンクリート
床面の施工方法。 ２、コンクリートポンプで打設できる程度の流動性を有
するように流動化剤を添加した３８％程度の水セメント
比のコンクリートが２時間程度凝結しないように遅延剤
を添加したコンクリートを床面に打設する第１工程、コ
ンクリート表面から真空処理により吸水し水セメント比
を３０％程度とする第２工程、コンクリート表面に水セ
メント比０％〜１５％程度のモルタルを散布する第３工
程、表面に水分を移動させ水セメント比が２３％程度と
なり、かつモルタルとベースコンクリートが接着するよ
うにコンクリート表面に０．１ｋｇ／ｃｍ＾２程度の弱
い加圧力で超音波振動を加える第４工程、コンクリート
表面に表面およびベースコンクリート部分まで締め固ま
るように１ｋｇ／ｃｍ＾２程度の強い加圧力で超音波振
動を加える第５工程からなるち密層の厚いコンクリート
床面の施工方法。 ３、真空処理により吸水する第２工程において表面振動
機で加振する請求項２記載のち密層の厚いコンクリート
床面の施工方法。[Scope of Claims] 1. Concrete with a low water-to-cement ratio to which a fluidizing agent has been added so as to give fluidity that can be cast with a concrete pump is poured on the floor, and water is absorbed from the surface by vacuum, and then
Sprinkle mortar with a water-cement ratio of about 0% to 15% to make the water-cement ratio about 23%, and pour concrete so that the water moves to the surface and the mortar and base concrete adhere, forming a dense layer. A construction method for thick concrete floors that applies ultrasonic vibration within two hours of installation. 2. Concrete with a retardant added to the floor to prevent the concrete with a water-cement ratio of approximately 38% from setting for about 2 hours, with a fluidizing agent added so that it has enough fluidity to be poured with a concrete pump. The first step is to absorb water from the concrete surface by vacuum treatment to make the water-cement ratio about 30%, and the third step is to spread mortar with a water-cement ratio of about 0% to 15% on the concrete surface. The fourth step is to apply ultrasonic vibration to the concrete surface with a weak pressing force of about 0.1 kg/cm^2 to move moisture so that the water-cement ratio becomes about 23% and to bond the mortar and base concrete, the concrete surface. A construction method for a thick concrete floor surface consisting of a fifth step of applying ultrasonic vibration with a strong pressing force of about 1 kg/cm^2 to compact the surface and base concrete part. 3. The method for constructing a concrete floor surface with a thick dense layer according to claim 2, wherein in the second step of absorbing water by vacuum treatment, vibration is performed using a surface vibrator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17916590A JP2747740B2 (en) | 1990-07-06 | 1990-07-06 | Construction method of concrete floor with thick dense layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17916590A JP2747740B2 (en) | 1990-07-06 | 1990-07-06 | Construction method of concrete floor with thick dense layer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0468163A true JPH0468163A (en) | 1992-03-03 |
| JP2747740B2 JP2747740B2 (en) | 1998-05-06 |
Family
ID=16061079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17916590A Expired - Fee Related JP2747740B2 (en) | 1990-07-06 | 1990-07-06 | Construction method of concrete floor with thick dense layer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2747740B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100387105B1 (en) * | 2000-07-14 | 2003-06-12 | 원하종합건설 주식회사 | Self-Leveling and backfill settlement-free material, manufacturing method thereof and construction method using the same |
-
1990
- 1990-07-06 JP JP17916590A patent/JP2747740B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100387105B1 (en) * | 2000-07-14 | 2003-06-12 | 원하종합건설 주식회사 | Self-Leveling and backfill settlement-free material, manufacturing method thereof and construction method using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2747740B2 (en) | 1998-05-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |