JP2002121899A - Repairing method for concrete structure - Google Patents
Repairing method for concrete structureInfo
- Publication number
- JP2002121899A JP2002121899A JP2000318340A JP2000318340A JP2002121899A JP 2002121899 A JP2002121899 A JP 2002121899A JP 2000318340 A JP2000318340 A JP 2000318340A JP 2000318340 A JP2000318340 A JP 2000318340A JP 2002121899 A JP2002121899 A JP 2002121899A
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- cement
- concrete structure
- repairing
- restoration
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5076—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with masses bonded by inorganic cements
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/72—Repairing or restoring existing buildings or building materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Aftertreatments Of Artificial And Natural Stones (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、コンクリート構造
物の補修方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for repairing a concrete structure.
【０００２】[0002]
【従来の技術】一般に、コンクリート構造物には、構築
後の経年変化による劣化や、塩害による劣化、外力の衝
突や、温度変化によるひび割れなど、種々の劣化要因が
ある。劣化の進行形態は、コンクリートに形成された様
々な通水路付近に存在する可溶性のＣａ（ＯＨ）２（水
酸化カルシウム）や、未水和セメント、低結晶セメント
ゲルが各種の劣化要因のターゲットとされ、さらにそれ
が二次反応を誘発し、鉄筋発錆などの損傷にもつながる
ものであるとされている。2. Description of the Related Art In general, concrete structures have various deterioration factors such as deterioration due to aging after construction, deterioration due to salt damage, collision with external force, and cracks due to temperature change. Degradation progress is based on the fact that soluble Ca (OH) 2 (calcium hydroxide), unhydrated cement, and low-crystalline cement gel, which exist near various water channels formed in concrete, are targets for various degradation factors. In addition, it is said that it induces a secondary reaction and leads to damage such as rusting of reinforcing bars.
【０００３】これらの劣化部分の補修を行うには、ブレ
ーカや、ウオータージェット等で表層部分における劣化
コンクリート部分をはつり取った後、一般には次の手順
により補修を行っていた。 （１）はつり面を洗浄・清掃 （２）アンカー・溶接金網を設置 （３）はつり面にプライマーを塗布 （４）型枠を設置 （５）モルタルあるいはコンクリートを充填 （６）養生In order to repair these deteriorated portions, a deteriorated concrete portion in a surface layer portion is scraped off with a breaker, a water jet, or the like, and then repaired in general by the following procedure. (1) Cleaning and cleaning of the hanging surface (2) Installation of anchor and welding wire mesh (3) Application of primer to the hanging surface (4) Installation of formwork (5) Filling with mortar or concrete (6) Curing
【発明が解決しようとする課題】しかしながら、このよ
うな従来の方法にあっては、次に述べるような技術的課
題があった。すなわち、開口部の隅角部や、断面変化点
と言った応力集中の発生する位置や、その他の引張力が
作用する部位では、補修後のモルタルやコンクリートに
ひび割れが発生し、構造物の耐久性が低下する。However, such a conventional method has the following technical problems. That is, cracks occur in the mortar and concrete after repair at the corners of openings, at points where stress concentration occurs such as cross-section change points, and at other places where tensile force acts, resulting in the durability of the structure. Is reduced.
【０００４】また、以上の不具合が発生した場合には、
特に応力の集中しやすい箇所などではセメントの刷込
み、Ｖカットなどをおこなって、モルタル充填や樹脂注
入などにより補修する必要が生じ、またこのような補修
を行っても再度ひび割れが発生するおそれがあった。[0004] Further, when the above problems occur,
Particularly in places where stress is likely to be concentrated, it is necessary to perform cement printing, V-cut, etc., and repair by mortar filling, resin injection, etc., and even if such repair is performed, cracks may occur again. Was.
【０００５】本発明は、以上の課題を解決するものであ
って、その目的は、修復面における以上のひび割れの再
発生を防止できるようにしたコンクリート構造物の補修
方法を提供するものである。An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a method for repairing a concrete structure capable of preventing the occurrence of the above-mentioned cracks on a repaired surface.
【０００６】[0006]
【課題を解決するための手段】以上の目的を達成するた
め、本発明は、既存コンクリート構造物表面の劣化部位
をはつり取り、はつり面に新たなモルタルまたはコンク
リートからなる修復材を打設して構造物表面を修復する
ようにしたコンクリート構造物の補修方法において、前
記修復材として、セメント水和生成物が増殖する作用を
有するセメント結晶増殖材を用いることを特徴とする。
従って、本発明方法によれば、セメント結晶増殖材がは
つり取った微細ひび割れ内に回り込み、増殖して既存コ
ンクリート構造物に対する修復材との付着性を向上でき
る。In order to achieve the above object, the present invention removes a deteriorated portion of the surface of an existing concrete structure and casts a restoring material made of new mortar or concrete on the dropped surface. In the method for repairing a concrete structure in which a surface of the structure is repaired, a cement crystal breeding material having an action of growing a cement hydration product is used as the repairing material.
Therefore, according to the method of the present invention, the cement crystal breeding material wraps around into the fine cracks that have been removed and multiplies to improve the adhesion of the existing crystal structure to the restoration material.
【０００７】なお、本発明で言う「セメント結晶増殖
材」とは、コンクリート中に含まれる水や水酸化カルシ
ウム等と反応して不溶性のC−S−Ｈ系結晶やＭｇＳｉＯ
３ 結晶等のセメント水和生成物を生成・増殖させ、こ
れらの化合物によりコンクリート中に大小さまざまにつ
ながった毛細孔、空隙等を充填し、繊密化する機能を持
つ止水材である。[0007] The "cement crystal breeding material" referred to in the present invention refers to an insoluble C-S-H-based crystal or MgSiO 2 which reacts with water or calcium hydroxide contained in concrete.
3 is generated and grown cement hydration products crystal such as hair pores led to various sizes in the concrete by these compounds, to fill voids or the like, a water stopping material with the ability to繊密of.
【０００８】請求項２に記載の発明では、前記セメント
結晶増殖材を修復材打設前のはつり面に塗布するプライ
マに混入することを特徴とする。従って、本発明方法に
よれば、前述のごときセメント結晶増殖材の特性によ
り、既存コンクリートと修復材との付着性を高めること
ができる。[0008] The invention according to claim 2 is characterized in that the cement crystal breeding material is mixed into a primer applied to a hanging surface before the restoration material is cast. Therefore, according to the method of the present invention, the adhesiveness between the existing concrete and the restoration material can be enhanced by the characteristics of the cement crystal breeding material as described above.
【０００９】請求項３に記載の発明では、はつり面側に
塗布される修復材に前記セメント結晶増殖材を混入した
ものを用い、その後、通常配合の修復材を打設すること
を特徴とする。従って、本発明方法においても、請求項
２の発明と同等の効果を得ることが出来る。According to a third aspect of the present invention, a material obtained by mixing the cement crystal breeding material into a restoring material applied to the hanging surface side is used, and thereafter, a restoring material of a normal blend is cast. . Therefore, in the method of the present invention, the same effect as that of the second aspect can be obtained.
【００１０】請求項４に記載の発明によれば、打設され
る修復材全体に前記結晶増殖材を混入することを特徴と
する。従って、本発明方法によれば、補修面の全般的止
水補強を容易に行うことが可能である。According to a fourth aspect of the present invention, the crystal growth material is mixed into the entire restoration material to be cast. Therefore, according to the method of the present invention, it is possible to easily perform the overall waterproofing reinforcement of the repaired surface.
【００１１】[0011]
【発明の実施の形態】以下、本発明の好ましい実施の形
態につき、添付図面を参照して詳細に説明する。図１
（ａ）〜（ｄ）は、本発明方法による補修手順を示して
いる。Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG.
(A)-(d) have shown the repair procedure by the method of this invention.
【００１２】先ず、（ａ）に示すように、既存コンクリ
ート構造物１の表層部において、ひび割れ発生部位など
の表面劣化部位１ａが特定された場合、（ｂ）に示すよ
うに、ブレーカ、ウオータージェット等により、その表
層部位を所定の深さ分はつり取り、はつり面１ｂを洗浄
し、次いで、はつり面１ｂに溶接金網、アンカー２を設
置する。はつり深さは、ひび割れ等の劣化の程度に応じ
て定める。First, as shown in (a), when a surface deterioration site 1a such as a crack occurrence site is specified in the surface layer portion of the existing concrete structure 1, as shown in (b), a breaker and a water jet are shown. For example, the surface portion is suspended by a predetermined depth, the suspension surface 1b is cleaned, and then a welding wire mesh and an anchor 2 are installed on the suspension surface 1b. The drop depth is determined according to the degree of deterioration such as cracking.
【００１３】その後、（ｃ）に示すごとく、はつり面１
ｂにプライマ３を塗布する。塗布は吹付けまたは刷毛塗
り等による。プライマ３は、水溶性の材料からなり、そ
の親和性により、次の修復材打設工程でのはつり面２に
対する付着性を確保する機能を備えた材料である。[0013] Thereafter, as shown in FIG.
Apply primer 3 to b. Application is by spraying or brushing. The primer 3 is made of a water-soluble material, and is a material having a function of securing adhesion to the hanging surface 2 in the next restoration material placing step due to its affinity.
【００１４】プライマ３の塗布後は、（ｄ）に示すよう
に、その表面にフレッシュモルタルまたはコンクリート
からなる修復材４を打設して、構造物１の表面を整える
ことにより修復が完了する。After the application of the primer 3, as shown in (d), a restoring material 4 made of fresh mortar or concrete is cast on the surface, and the surface of the structure 1 is adjusted to complete the restoration.
【００１５】以上において、塗布されるプライマ２とし
て、主剤に対して所定割合で結晶増殖材を添加したもの
を用いることが好ましい。これは、はつり面１ｂにおい
ても、ブレーカ等の振動によって、ひび割れが生じてお
り、結晶増殖材は、前述する結晶増殖効果によりこのひ
び割れ内に枝葉状に浸透して内部を充填し、止水性を発
現するからである。In the above, it is preferable to use a primer 2 to which a crystal breeding material is added at a predetermined ratio to the main agent as the primer 2 to be applied. This is because cracks are also generated on the hanging surface 1b due to vibration of a breaker or the like, and the crystal growth material penetrates into the cracks and fills the inside of the cracks due to the crystal growth effect described above. It is because it is expressed.
【００１６】その後、修復材４として打設されるモルタ
ルまたはコンクリートは、通常の配合比のセメント材料
を混練したものを用いても良いし、結晶増殖材を所定割
合で添加した材料を用いても良い。Thereafter, the mortar or concrete to be cast as the restoration material 4 may be a kneaded cement material having a normal mixing ratio or a material to which a crystal breeding material is added at a predetermined ratio. good.
【００１７】結晶増殖材を添加したものを用いる場合に
は、打設工程を二工程に分け、第一工程、すなわち目地
と接する面では、結晶増殖材を配合したものを用い、次
工程で、通常のセメント材料を用いても良いし、全打設
材料に結晶増殖材を添加混練したものを用いても良く、
いずれの組合わせを選択することもできる。When a material to which a crystal breeding material is added is used, the casting step is divided into two steps. In the first step, that is, in a surface in contact with the joint, a compound containing a crystal breeding material is used. Ordinary cement material may be used, or a material obtained by adding and kneading a crystal breeding material to all the casting materials may be used,
Either combination can be selected.
【００１８】以下の表は、その配合の一例を示すもの
で、Ｗは水、Ｃはコンクリートである。The following table shows an example of the composition, where W is water and C is concrete.
【００１９】[0019]
【表１】 [Table 1]
【００２０】以上の表において、結晶増殖材は、材料中
に占める配合割合が大きいほど大きなひび割れ防止効果
を発現するが、材料そのものの値段が高くなるため、効
果対費用の割に応じて以上の配合比が最適なものとな
る。[0020] In the above table, the larger the proportion of the crystal breeding material in the material, the greater the effect of preventing cracking, but the higher the price of the material itself, the greater the cost of the material itself. The compounding ratio becomes optimal.
【００２１】そして、以上の配合比で作られたモルタル
またはコンクリートは、打設後の発熱に伴う温度応カ
や、乾燥収縮等により目地にひび割れが誘発されると、
目地の近傍に打設された修復材４中に含まれる結晶増殖
材および目地表面に塗布された結晶増殖材は不溶性のＣ
−Ｓ−Ｈ系結晶やＭｇＳｉＯ３結晶等を連鎖的に増殖
し、誘発されたひび割れを閉塞していく。When the mortar or concrete made with the above mixing ratio is cracked at the joint due to temperature response due to heat generation after casting, drying shrinkage, etc.,
The crystal growth material contained in the restoration material 4 cast near the joint and the crystal growth material applied to the joint surface are insoluble C
The -S-H-based crystal and MgSiO 3-crystallization and the like grow a chain reaction, continue to close the induced cracking.
【００２２】このようにして、ひび割れに硬化剤を注入
することなく塩素イオン、酸素、水等の劣化因子の浸入
が阻止されるとともに、コンクリート中に止水板等を設
けることなく水等の浸入が阻止され、強固な修復面を形
成することになる。そして、その結果、構造物の耐久性
を向上させることができ、また、工事全体の作業効率も
向上できる。In this way, the intrusion of deterioration factors such as chlorine ions, oxygen and water can be prevented without injecting a hardening agent into the cracks, and the intrusion of water and the like can be prevented without providing a waterproof plate or the like in concrete. Is prevented, and a strong repair surface is formed. As a result, the durability of the structure can be improved, and the work efficiency of the entire construction can be improved.
【００２３】[0023]
【発明の効果】以上の説明により明らかなように、本発
明によるコンクリート構造物の補修方法にあっては、セ
メント水和生成物を連続的に増殖する作用を有するセメ
ント結晶増殖材を用いることにより、ひび割れの再発生
を防止できる。As is apparent from the above description, in the method for repairing a concrete structure according to the present invention, a cement crystal breeding material having a function of continuously growing cement hydration products is used. And the occurrence of cracks can be prevented.
【００２４】また、セメント結晶増殖材をはつり面に塗
布するプライマに混入することにより、セメント結晶増
殖材の特性により、既存コンクリートと修復材との付着
性を高めるため、既存コンクリートと、修復材との付着
性の仲立ちを行う材料として好適である。[0024] Further, by mixing the cement crystal breeding material into the primer applied to the hanging surface to enhance the adhesiveness between the existing concrete and the restoration material due to the characteristics of the cement crystal breeder material, the existing concrete and the restoration material are mixed. It is suitable as a material for mediating the adhesiveness of the material.
【００２５】さらに、はつり面側に塗布される修復材中
に前記セメント結晶増殖材を混入したものを用い、その
後通じよう配合の修復材を打設しても良いし、打設され
る修復材の全体に前記結晶増殖材を混入しても良く、各
種組合わせを選ぶことができる。[0025] Further, a restoration material mixed with the cement crystal breeding material in a restoration material applied to the hanging surface side may be used, and a restoration material of a blended composition may be poured into the restoration material. May be mixed with the above-mentioned crystal breeding material, and various combinations can be selected.
【図１】（ａ）〜（ｄ）は本発明方法を実施するための
手順を示す断面説明図である。FIGS. 1A to 1D are cross-sectional views showing a procedure for carrying out a method of the present invention.
１ 既存コンクリート構造物 １ａ 表面劣化部位 １ｂ はつり面 ３ プライマ ４ 修復材（モルタルまたはコンクリート） 1 Existing Concrete Structure 1a Surface Deteriorated Area 1b Sloping Surface 3 Primer 4 Restoration Material (Mortar or Concrete)
Claims (4)
をはつり取り、はつり面にフレッシュモルタルまたはコ
ンクリートからなる修復材を打設して構造物表面を修復
するようにしたコンクリート構造物の補修方法におい
て、 前記修復材として、セメント水和生成物が増殖する作用
を有するセメント結晶増殖材を用いることを特徴とする
コンクリート構造物の補修方法。1. A method for repairing a concrete structure, in which a deteriorated portion on the surface of an existing concrete structure is scraped off, and a restoring material made of fresh mortar or concrete is cast on the dropping surface to repair the structure surface. A method for repairing a concrete structure, characterized in that a cement crystal breeding material having a function of growing a cement hydration product is used as the repairing material.
前のはつり面に塗布するプライマに混入することを特徴
とする請求項１に記載のコンクリート構造物の補修方
法。2. The method for repairing a concrete structure according to claim 1, wherein the cement crystal breeding material is mixed into a primer applied to a hanging surface before the restoration material is cast.
セメント結晶増殖材を混入したものを用い、その後、通
常配合の修復材を打設することを特徴とする請求項１記
載のコンクリート構造物の補修方法。3. The concrete according to claim 1, wherein a restoration material mixed with said cement crystal breeding material is used in a restoration material applied to a hanging surface side, and thereafter, a restoration material of a normal blend is cast. How to repair the structure.
を混入することを特徴とする請求項１に記載のコンクリ
ート構造物の補修方法。4. The method for repairing a concrete structure according to claim 1, wherein the crystal breeding material is mixed into the entire restoration material to be cast.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000318340A JP4320943B2 (en) | 2000-10-18 | 2000-10-18 | Repair method for concrete structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000318340A JP4320943B2 (en) | 2000-10-18 | 2000-10-18 | Repair method for concrete structures |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002121899A true JP2002121899A (en) | 2002-04-26 |
| JP4320943B2 JP4320943B2 (en) | 2009-08-26 |
Family
ID=18796985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000318340A Expired - Fee Related JP4320943B2 (en) | 2000-10-18 | 2000-10-18 | Repair method for concrete structures |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4320943B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008280760A (en) * | 2007-05-10 | 2008-11-20 | Taisei Corp | Shear reinforcing method and filler injection method |
| FR2990942A1 (en) * | 2012-05-22 | 2013-11-29 | Pergolese Ingenierie | Repairing perennial burst concrete having steel corrosion and carbonation, comprises re-coating a high performance stabilized concrete, where high performance concrete is reinforced and stabilized by organic fibers |
-
2000
- 2000-10-18 JP JP2000318340A patent/JP4320943B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008280760A (en) * | 2007-05-10 | 2008-11-20 | Taisei Corp | Shear reinforcing method and filler injection method |
| FR2990942A1 (en) * | 2012-05-22 | 2013-11-29 | Pergolese Ingenierie | Repairing perennial burst concrete having steel corrosion and carbonation, comprises re-coating a high performance stabilized concrete, where high performance concrete is reinforced and stabilized by organic fibers |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4320943B2 (en) | 2009-08-26 |
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