JPH0452376A - Processing method for vertical construction joint face of concrete - Google Patents
Processing method for vertical construction joint face of concreteInfo
- Publication number
- JPH0452376A JPH0452376A JP2163588A JP16358890A JPH0452376A JP H0452376 A JPH0452376 A JP H0452376A JP 2163588 A JP2163588 A JP 2163588A JP 16358890 A JP16358890 A JP 16358890A JP H0452376 A JPH0452376 A JP H0452376A
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- sheet
- joint face
- joint surface
- vertical
- 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 claims abstract description 43
- 238000010276 construction Methods 0.000 title abstract 6
- 238000003672 processing method Methods 0.000 title description 3
- 238000000034 method Methods 0.000 claims description 22
- 238000009415 formwork Methods 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 6
- WHUUTDBJXJRKMK-UHFFFAOYSA-N Glutamic acid Natural products OC(=O)C(N)CCC(O)=O WHUUTDBJXJRKMK-UHFFFAOYSA-N 0.000 abstract description 2
- 239000002253 acid Substances 0.000 abstract description 2
- 235000013922 glutamic acid Nutrition 0.000 abstract description 2
- 239000004220 glutamic acid Substances 0.000 abstract description 2
- 239000004745 nonwoven fabric Substances 0.000 abstract description 2
- 150000007524 organic acids Chemical class 0.000 abstract description 2
- FOGYNLXERPKEGN-UHFFFAOYSA-N 3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfopropyl)phenoxy]propane-1-sulfonic acid Chemical compound COC1=CC=CC(CC(CS(O)(=O)=O)OC=2C(=CC(CCCS(O)(=O)=O)=CC=2)OC)=C1O FOGYNLXERPKEGN-UHFFFAOYSA-N 0.000 abstract 1
- WHUUTDBJXJRKMK-VKHMYHEASA-N L-glutamic acid Chemical compound OC(=O)[C@@H](N)CCC(O)=O WHUUTDBJXJRKMK-VKHMYHEASA-N 0.000 abstract 1
- 239000011358 absorbing material Substances 0.000 abstract 1
- 238000004090 dissolution Methods 0.000 abstract 1
- 235000005985 organic acids Nutrition 0.000 abstract 1
- 238000005406 washing Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 238000007788 roughening Methods 0.000 description 2
- 238000005488 sandblasting Methods 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/36—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article
- B28B7/362—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article specially for making moulded articles from concrete with exposed aggregate
-
- 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
- C04B40/06—Inhibiting the setting, e.g. mortars of the deferred action type containing water in breakable containers ; Inhibiting the action of active ingredients
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、コンクリートの鉛直打継面の処理方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for treating a vertical pour joint surface of concrete.
（従来の技術）
型枠内に打設されたコンクリートの鉛直打継面は、無処
理の状態では、比較的平滑なため、後行コンクリートと
の間の一体性が充分に確保することが困難なので、この
部分の剪断力が低下しやすい。(Prior art) The vertical pour joint surface of concrete placed in a formwork is relatively smooth in an untreated state, so it is difficult to ensure sufficient integrity with the following concrete. Therefore, the shearing force in this part tends to decrease.
そこで、従来は、コンクリートの鉛直打継面の一体性を
強化するため、鉛直打継面を粗面化することが広く採用
されており、このときの処理方法として以下に説明する
３つの方法があった。Therefore, conventionally, it has been widely adopted to roughen the vertical joint surface of concrete in order to strengthen the integrity of the vertical joint surface. there were.
まず、第１の処理方法は、鉛直打継面をワイヤブラシな
どによって粗面化する方法であり、第２の処理方法は、
鉛直打継面にサンドブラスト、チッピングを行った後水
洗する方法、および、第３の処理方法は、打設されたコ
ンクリートの硬化を遅らせる凝結遅延剤を予め鉛直打継
面側の型枠に塗布しておき、型枠を撤去した後に、高圧
水で打継面を洗浄して粗面化させる方法である。First, the first treatment method is to roughen the vertical joint surface using a wire brush or the like, and the second treatment method is to roughen the vertical joint surface using a wire brush or the like.
The third treatment method is to perform sandblasting and chipping on the vertical joint surface and then wash it with water, and the third treatment method is to apply a setting retarder to the formwork on the vertical joint surface side in advance to retard the hardening of the poured concrete. In this method, after the formwork is removed, the joint surface is cleaned and roughened with high-pressure water.
しかしながら、これらの従来の処理方法には、いずれも
以下に説明する技術的課題があった。However, all of these conventional processing methods have the technical problems described below.
（発明が解決しようとする課題）
すなわち、第１の処理方法では、打継面を人手により擦
る作業なので、作業能率が低く、コンクリートの強度が
大きいとその作業が困難になる。(Problems to be Solved by the Invention) In other words, in the first treatment method, the work of manually rubbing the joint surface is low, and the work becomes difficult if the strength of the concrete is high.
また、第２の処理方法では、サンドブラストの大掛かり
な設備が必要になる上に、粉塵が飛散し、作業環境が悪
化するという問題がある。In addition, the second treatment method requires large-scale sandblasting equipment and has the problem that dust is scattered and the working environment deteriorates.
さらに、第３の処理方法では、型枠に塗布した遅延剤が
下方にタレることなどにより、その厚みを均一にするこ
とが難しいので、打設されたコンクリート面に遅延剤が
侵入する距離にバラツキが生じ、深く入り過ぎると洗浄
によりこれを除去することが難しく、また、あまり浅す
ぎると粗面化が不十分になり、粗面化状態を一定に保つ
ことが困難であった。Furthermore, in the third treatment method, the retardant applied to the formwork drips downward, making it difficult to make the thickness uniform. Variations occur, and if they penetrate too deep, it is difficult to remove them by washing, and if they are too shallow, the surface roughening becomes insufficient, making it difficult to maintain a constant roughened state.
この発明は、このような従来の問題点に鑑みてなされた
ものであり、その目的とするところは、作業能率が高く
、かつ、作業環境の悪化を伴なわず、また、大掛かりな
設備を必要とせず、しかも品質管理が容易に行えるコン
クリートの鉛直打継面の処理方法を提供することにある
。This invention was made in view of these conventional problems, and its purpose is to achieve high work efficiency, do not cause deterioration of the work environment, and do not require large-scale equipment. To provide a method for treating a vertical pour joint surface of concrete, which can easily perform quality control without causing damage.
（課題を解決するための手段）
上記目的を達成するために、本発明は、先行コンクリー
トの硬化後に、鉛直打継面を介して後行コンクリートを
打設する際のコンクリート間の前記鉛直打継面の処理方
法において、前記先行コンクリートの前記鉛直打継面に
設置される型枠の内面に予め凝結遅延剤が含浸されたシ
ートを貼着しておき、打設された前記先行コンクリート
の強度発現後に前記シートを除去し、露出した前記鉛直
打継面を洗浄することにより粗面化し、この後に前記後
行コンクリートを打設することを特徴とする。(Means for Solving the Problems) In order to achieve the above object, the present invention provides the vertical pour joint between concrete when pouring subsequent concrete via the vertical pour joint surface after the preceding concrete has hardened. In the surface treatment method, a sheet pre-impregnated with a setting retardant is pasted on the inner surface of a formwork installed on the vertical joint surface of the preceding concrete, and the strength of the poured preceding concrete is developed. The method is characterized in that the sheet is then removed, the exposed vertical joint surface is roughened by cleaning, and then the trailing concrete is placed.
（作用）
上記構成の処理方法によれば、打設コンクリートの鉛直
打継面に侵入して、その硬化を遅らせる凝結遅延剤は、
シートに含浸させられているので、その含浸量は任意に
調整できるとともに、シートに均一に含浸できる。(Function) According to the treatment method with the above configuration, the setting retarder that invades the vertical joint surface of poured concrete and retards its hardening,
Since the sheet is impregnated, the amount of impregnation can be adjusted as desired, and the sheet can be impregnated uniformly.
（実施例）
以下、この発明の好適な実施例について添付図面を参照
にして詳細に説明する。(Embodiments) Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
第１図は、この発明にかかるコンクリートの鉛直打継面
の処理方法の一実施例を示している。FIG. 1 shows an embodiment of the method for treating a vertical joint surface of concrete according to the present invention.
同図に示す処理方法では、第１図（Ａ）に示すように、
先行コンクリートＡ打設用の型枠１０が設置される。In the processing method shown in the same figure, as shown in FIG. 1(A),
Formwork 10 for placing advance concrete A is installed.
このとき、本発明の処理方法では、型枠１０のうち鉛直
打継面Ｂに対応した部分に設置される型枠１０ａの内面
にシート１２が貼着される。At this time, in the treatment method of the present invention, the sheet 12 is pasted on the inner surface of the formwork 10a installed in the part of the formwork 10 that corresponds to the vertical joint surface B.
このシート１２は、紙、不織布、高分子吸収材を担持さ
せた紙などを基材とし、この基材に凝結遅延剤、例えば
、オキシカルボン酸、グルタミン酸、リグニンスルフォ
ン酸などの有機酸を主成分とするものを水に溶解するこ
とにより含浸させたものである。This sheet 12 has a base material such as paper, nonwoven fabric, or paper supporting a polymeric absorbent material, and contains a setting retarder, for example, an organic acid such as oxycarboxylic acid, glutamic acid, or lignin sulfonic acid as a main component. It is impregnated by dissolving it in water.
シート１２の貼着手段としては、粘着テープや接着剤に
よる接着手段、あるいは、釘状の金属部材を打ち込む手
段などが採用される。As the means for attaching the sheet 12, adhesive tape or adhesive means, or means for driving a nail-shaped metal member, etc., are employed.
以上の型枠１０の設置が完了すると、型枠１０内には、
第１図（Ｂ）に示すように、先行コンクリートＡが打設
される。When the above installation of the formwork 10 is completed, inside the formwork 10,
As shown in FIG. 1(B), preliminary concrete A is placed.
そして、所定の期間養生して、先行コンクリートＡの強
度が発現されると、型枠１０の脱型が行われる。Then, after curing for a predetermined period and the strength of the preceding concrete A is developed, the formwork 10 is demolded.
このときの養生期間において、シート１２に含浸させら
れている凝結遅延剤は、コンクリート中に含まれている
水分により溶出され、先行コンクリートＡ側に侵入し、
凝結遅延剤が侵入した部分のコンクリートの硬化が遅ら
せられる。During this curing period, the setting retarder impregnated into the sheet 12 is eluted by the water contained in the concrete and enters the preceding concrete A side.
The hardening of concrete in areas where the setting retarder has penetrated is delayed.
この場合、本発明の方法では、養生期間を一定にした場
合、凝結遅延剤がシート１２に含浸させられているので
、前述したシート１２の基材の厚みや、凝結遅延剤の溶
解量を適宜設定することにより、先行コンクリートＡ側
に侵入する凝結遅延剤の侵入距離を調整できるとともに
、基材に含浸させられる凝結剤は、場所によるムラが発
生しないので、侵入距離も均一になる。In this case, in the method of the present invention, when the curing period is kept constant, the setting retarder is impregnated into the sheet 12, so the thickness of the base material of the sheet 12 and the amount of dissolved setting retarder are adjusted as appropriate. By setting, the penetration distance of the setting retarder that penetrates into the preceding concrete A side can be adjusted, and since the setting retarder impregnated into the base material does not vary depending on the location, the penetration distance is also uniform.
型枠１０の脱型により、第１図（Ｃ）に示すように、先
行コンクリートＡの鉛直打継面Ｂが露出するが、この露
出面には、シート１２が残っているので、続く工程では
、シート１２およびこれに含浸させられていた凝結遅延
剤の除去と、凝結遅延剤の作用により完全に硬化されて
いない部分のコンクリート洗い出しが行われる。By demolding the formwork 10, the vertical pouring surface B of the preceding concrete A is exposed as shown in FIG. , removal of the sheet 12 and the setting retarder impregnated therein, and washing out of the concrete in areas that have not been completely hardened by the action of the setting retarder.
この洗い出しは、水洗により行われるが、養生期間が比
較的長い場合には、高圧水の使用が望ましい。This washing is performed by washing with water, but if the curing period is relatively long, it is desirable to use high-pressure water.
そして、洗い出しが終了すると、第１図（Ｄ）に示すよ
うに、鉛直打継面Ｂに所定の深さを持った均一な凹凸面
が形成される。When the cleaning is completed, a uniform uneven surface having a predetermined depth is formed on the vertical joint surface B, as shown in FIG. 1(D).
このようにして先行コンクリートＡの鉛直打継面Ｂが粗
面化されると、この打継面Ｂの側方に型枠を再び設置し
て後行コンクリートＣが打設されることになる。When the vertical pouring joint surface B of the preceding concrete A is roughened in this way, a formwork is again installed on the side of this pouring joint surface B, and the succeeding concrete C is poured.
（発明の効果）
以上、実施例で詳細に説明したように、この発明にかか
るコンクリートの鉛直打継面の処理方法によれば、以下
の効果が得られる。(Effects of the Invention) As described above in detail in the Examples, according to the method for treating a vertical pour joint surface of concrete according to the present invention, the following effects can be obtained.
■本発明の処理方法では、鉛直打継面側の型枠に凝結剤
含浸シートを予め貼着しておき、脱型後に打継面を洗浄
することにより均一な粗面化が得られるので、簡単な作
業で工程を短縮できるとともに、大掛かりな設備も必要
とせず、作業環境も悪化しない。■In the treatment method of the present invention, a coagulant-impregnated sheet is pasted on the formwork on the vertical joint surface side in advance, and the joint surface is cleaned after demolding, thereby achieving uniform surface roughening. The process can be shortened with simple work, no large-scale equipment is required, and the working environment does not deteriorate.
■凝結剤含浸シートは、紙などが基材なので、簡単に適
当な大きさに切断でき、任意の範囲て粗面化部分を設定
できる。■Since the base material of the coagulant-impregnated sheet is paper, it can be easily cut to an appropriate size, and the roughened area can be set to any desired range.
■シートに含浸させられる凝結遅延剤は、ムラが発生し
ないので、粗面化部分の深さを均一に保つことができ、
鉛直打継面の品質が向上する。■The setting retarder impregnated into the sheet does not cause unevenness, so the depth of the roughened area can be maintained uniformly.
The quality of the vertical joint surface is improved.
■シートの凝結剤の含浸量は任意に設定できるのでこの
含浸量を調整することにより、粗面化部分の深さを選定
できる。■The amount of coagulant impregnated into the sheet can be set arbitrarily, so by adjusting this amount of impregnation, the depth of the roughened portion can be selected.
第１図は本発明にかかるコンクリートの鉛直打継面の処
理方法を工程順に示す説明図である。
Ａ・・・・・・先行コンクリート Ｂ・・・・・・鉛
直打継面Ｃ・・・・・・後行コンクリート １０・・
・型枠１２・・・・・・シート
第１図FIG. 1 is an explanatory diagram showing the method for treating a vertical joint surface of concrete according to the present invention in the order of steps. A... Leading concrete B... Vertical pour joint surface C... Trailing concrete 10...
・Formwork 12... Sheet figure 1
Claims (1)
コンクリートを打設する際のコンクリート間の前記鉛直
打継面の処理方法において、前記先行コンクリートの前
記鉛直打継面に設置される型枠の内面に予め凝結遅延剤
が含浸されたシートを貼着しておき、打設された前記先
行コンクリートの強度発現後に前記シートを除去し、露
出した前記鉛直打継面を洗浄することにより粗面化し、
この後に前記後行コンクリートを打設することを特徴と
するコンクリートの鉛直打継面の処理方法。In the method for treating the vertical pour joint surface between concretes when pouring subsequent concrete via the vertical pour joint surface after hardening of the preceding concrete, a formwork is installed on the vertical pour joint surface of the preceding concrete. A sheet pre-impregnated with a setting retarder is pasted on the inner surface of the concrete, and after the poured concrete has developed its strength, the sheet is removed and the exposed vertical joint surface is cleaned to create a rough surface. turned into
A method for treating a vertical pouring joint surface of concrete, which comprises placing the trailing concrete after this.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2163588A JPH0452376A (en) | 1990-06-21 | 1990-06-21 | Processing method for vertical construction joint face of concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2163588A JPH0452376A (en) | 1990-06-21 | 1990-06-21 | Processing method for vertical construction joint face of concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0452376A true JPH0452376A (en) | 1992-02-20 |
Family
ID=15776770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2163588A Pending JPH0452376A (en) | 1990-06-21 | 1990-06-21 | Processing method for vertical construction joint face of concrete |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0452376A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002274912A (en) * | 2001-03-14 | 2002-09-25 | Taiheiyo Cement Corp | Paste or mortar for joining water-permeable concrete |
| CN105421783A (en) * | 2015-12-18 | 2016-03-23 | 中交第二航务工程局有限公司 | wet joint face forming method |
| CN109624066A (en) * | 2018-12-18 | 2019-04-16 | 中交第航务工程局有限公司 | A kind of concrete component water rushes dabbing technique |
| CN112192704A (en) * | 2020-08-19 | 2021-01-08 | 保利长大工程有限公司 | Portable chiseling method for cement concrete |
-
1990
- 1990-06-21 JP JP2163588A patent/JPH0452376A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002274912A (en) * | 2001-03-14 | 2002-09-25 | Taiheiyo Cement Corp | Paste or mortar for joining water-permeable concrete |
| JP4536282B2 (en) * | 2001-03-14 | 2010-09-01 | 太平洋セメント株式会社 | Mortar for permeable concrete splicing |
| CN105421783A (en) * | 2015-12-18 | 2016-03-23 | 中交第二航务工程局有限公司 | wet joint face forming method |
| CN109624066A (en) * | 2018-12-18 | 2019-04-16 | 中交第航务工程局有限公司 | A kind of concrete component water rushes dabbing technique |
| CN112192704A (en) * | 2020-08-19 | 2021-01-08 | 保利长大工程有限公司 | Portable chiseling method for cement concrete |
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