JPH0417268B2 - - Google Patents
Info
- Publication number
- JPH0417268B2 JPH0417268B2 JP60053565A JP5356585A JPH0417268B2 JP H0417268 B2 JPH0417268 B2 JP H0417268B2 JP 60053565 A JP60053565 A JP 60053565A JP 5356585 A JP5356585 A JP 5356585A JP H0417268 B2 JPH0417268 B2 JP H0417268B2
- Authority
- JP
- Japan
- Prior art keywords
- groove
- crack
- elastic
- wall
- sealant
- 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 - Lifetime
Links
- 238000004078 waterproofing Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 18
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 239000004570 mortar (masonry) Substances 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 9
- 239000000565 sealant Substances 0.000 claims description 8
- 229920006026 co-polymeric resin Polymers 0.000 claims description 7
- 239000011398 Portland cement Substances 0.000 claims description 6
- -1 acrylic ester Chemical class 0.000 claims description 6
- 239000011150 reinforced concrete Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 238000005429 filling process Methods 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims 1
- 150000002148 esters Chemical class 0.000 claims 1
- 230000008439 repair process Effects 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000004567 concrete Substances 0.000 description 6
- 239000002243 precursor Substances 0.000 description 6
- 238000005259 measurement Methods 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000004590 silicone sealant Substances 0.000 description 2
- 239000004591 urethane sealant Substances 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011041 water permeability test Methods 0.000 description 1
Landscapes
- Working Measures On Existing Buildindgs (AREA)
Description
＜産業上の利用分野＞
本発明は、鉄筋コンクリート建物の外壁の補修
方法に関するもので、特に外壁に生じたひび割れ
の補修方法に係るものである。
＜従来の技術＞
鉄筋コンクリートの建物でも、建築後ある程度
期間が経過すると、地殻の変動等によつて生じた
建物の歪みによつて、駆体の表面にひび割れが生
じるが、これをそのまま放置すると、ひび割れか
らの漏水によつて鉄筋が腐蝕したり、あるいは侵
入した空気・ガス等によりコンクリートが中性化
して、建物の耐久性を損う。
これを防ぐため、外壁の補修工事を行うが、従
来の補修方法は、ひび割れ１をはつつて、第３図
の拡大断面図に示すような断面Ｕ状のＵ溝２を設
ける。そしてこのＵ溝２の深部すなわちひび割れ
１に沿つてシリコン又はウレタン系のシーリング
剤３を塗布してひび割れ１を塞いだのち、Ｕ溝２
内にポリマーモルタル４を充填して、Ｕ溝２を埋
めると共に、その表面を外面５と同じになるよう
にして仕上げていた。
＜発明が解決しようとする問題点＞
しかし、上記の従来方法では補修後期間がたつ
と、再び漏水がはじまる。これは、つぎの理由に
よると考えられる。すなわち、駆体Ａのひび割れ
１は期間が経過すると、駆体Ａの変動によつて僅
かではあるがひび割れ１が動くとみられるが、充
填したポリマーモルタル４には弾性がない。この
ため変動によつて、Ｕ溝２の内壁面６，６のいず
れかでポリマーモルタル４が駆体Ａから肌離れし
て、両者間に間隙が生ずる。隙間が生ずると、こ
こに雨水が侵入し、侵入した雨水は更に駆体Ａの
コンクリート内に浸透する。
一般にコンクリートでは、その内部から水分が
蒸発したあとが毛細管となつて残り、この毛細管
から水分がコンクリート内部に毛細管現象をおこ
して浸透する。毛細管現象によつて浸透する毛細
管高さＨと、管経ｄとの関係は、第２図に示す通
りであるが、この図から明らかなように管経ｄが
0.05〜0.1mmのときは、毛細管高Ｈは100mmから
120mmにも達する。このため外壁に沿つて流下す
る雨水は、駆体Ａ内に入り鉄筋へも容易に到する
こととなる。
＜問題点を解決するための手段＞
本発明は、上記の事情を考慮して開発したひび
割れ補修方法で、つぎのように構成する。すなわ
ち、鉄筋コンクリート建物の外壁に生じたひび割
れをはつつてＵ溝を設けるはつり工程と、ひび割
れにシーリング剤を塗布してひび割れを塞ぐシー
リング工程と、前記シーリング剤の内表面とＵ溝
の内壁面とにアクリル酸エステル共重合樹脂を主
成分とし、該樹脂の濃度50％のものに、ポルトラ
ンドセメントを重量比で１：１の割合で混合して
なる弾性防水剤を塗布して防水処理を施す防水工
程と、Ｕ溝内にアクリル酸エステル共重合樹脂に
ポルトランドセメントと砂とを重量比で１：２：
６の混合で混合してなる弾性モルタルを充填して
Ｕ溝を埋める充填工程とよりなる鉄筋コンクリー
ト建物外壁のひび割れ補修方法である。
＜作用＞
シーリング工程によつてひび割れを塞いだの
ち、シーリング剤の表面とＵ溝の斜面とに弾性防
水剤を塗布して防水処理を施すため、外壁を流れ
る雨水がＵ溝の内壁面から駆体内に浸透すること
を防止できる。またこの防水剤は優れた弾性を有
するので、処理後外気温等の変化によつて駆体が
伸縮した場合、防水層自体もこれに従つて伸縮す
るため、防水層が駆体から肌離れして浮き上つた
り、あるいはひび割れしない。またＵ溝の充填
も、優れた弾性を有する弾性モルタルで行うの
で、駆体の変動によつて充填部にひび割れが生ず
るのも防止できる。
＜実施例＞
以下に本発明の実施例を図面に基いて説明す
る。まず駆体Ａの外壁にひび割れ１１が生じたと
きは、ひび割れ１１をはつつて断面Ｕ形のＵ溝１
２を設けるはつり工程を行う。Ｕ溝１２の深部す
なわちひび割れ１１に沿つてシリコン又はウレタ
ン系のシーリング剤１３を塗布して、ひび割れ１
１を塞ぐシーリング工程を行う。つぎに前記塗布
したシーリング剤１３とＵ溝１２との内壁面１４
に優れた弾性を有する弾性防水剤１５を塗布する
防水処理を行う。弾性防水剤１５は、アクリル酸
エステル共重合樹脂を主成分とし、該樹脂の濃度
50％のものに、ポルトランドセメントを重量比で
１：１の割合で混合して調整する。
アクリル酸エステル共重合樹脂の一般的性質
は、つぎの通りである。
（エマルジヨンの性質）
粘 度 約8000cp（BH型、4rpm、25℃）
PH 6.5〜8.5
イオン性 アニオン
粒子径 約0.2ｍ
凍解安定性 −18℃
高温安定 良好（50℃×１ケ月）
顔料混和性 良好
最低造膜温度 ０℃以下
（フイルムの性質）
外 観 半透明、高弾性で柔く粘着性あり
強 度 約5.0Kgｆ／cm2
伸 度 約2000％
弾性防水剤１５の透水試験
水のとおり易いコンクリート製のフイルタープ
レートに弾性防水剤１５を膜厚２mmに塗布した試
験体に、つぎの条件で水圧をかけた試験結果。
<Industrial Application Field> The present invention relates to a method for repairing the outer wall of a reinforced concrete building, and particularly to a method for repairing cracks occurring in the outer wall. <Conventional technology> Even in reinforced concrete buildings, after a certain period of time has passed after construction, cracks occur on the surface of the concrete structure due to distortion of the building due to changes in the earth's crust, but if left as is, cracks can occur. Water leaking from cracks can corrode reinforcing steel, or concrete can become neutral due to intruding air or gas, impairing the durability of buildings. In order to prevent this, repair work is carried out on the outer wall, but the conventional repair method is to punch out the crack 1 and provide a U-shaped groove 2 with a U-shaped cross section as shown in the enlarged sectional view of FIG. After applying a silicone or urethane sealant 3 to the deep part of the U groove 2, that is, along the crack 1 to close the crack 1, the U groove 2
The inside was filled with polymer mortar 4 to fill the U groove 2, and the surface was finished to be the same as the outer surface 5. <Problems to be Solved by the Invention> However, in the conventional method described above, water leakage starts again after a period of time after repair. This is considered to be due to the following reason. That is, as time passes, the cracks 1 in the precursor A appear to move slightly due to fluctuations in the precursor A, but the filled polymer mortar 4 has no elasticity. Therefore, due to the fluctuation, the polymer mortar 4 separates from the precursor A on either of the inner wall surfaces 6, 6 of the U-groove 2, and a gap is created between the two. When a gap is created, rainwater enters into the gap, and the intruded rainwater further penetrates into the concrete of the base material A. In general, in concrete, moisture evaporates from the inside and remains behind in the form of capillary tubes, through which moisture permeates into the concrete through capillary action. The relationship between the height H of the capillary that penetrates due to capillarity and the tube diameter d is as shown in Figure 2.As is clear from this figure, the tube diameter d is
When it is 0.05 to 0.1mm, the capillary height H is from 100mm.
It can reach up to 120mm. For this reason, rainwater flowing down along the outer wall enters the structure A and easily reaches the reinforcing steel. <Means for Solving the Problems> The present invention is a crack repair method developed in consideration of the above circumstances, and is configured as follows. That is, a chisel process in which a U-groove is formed by broaching a crack that has occurred in the outer wall of a reinforced concrete building, a sealing process in which a sealant is applied to the crack to close it, and the inner surface of the sealant and the inner wall surface of the U-groove are Waterproofing is performed by applying an elastic waterproofing agent that is mainly composed of an acrylic ester copolymer resin, with a concentration of 50%, and mixed with Portland cement at a weight ratio of 1:1. In the process, the acrylic ester copolymer resin, Portland cement and sand are mixed in a weight ratio of 1:2 in the U groove.
This is a method for repairing cracks in the outer wall of a reinforced concrete building, which comprises a filling step of filling a U-groove with an elastic mortar prepared by mixing 6. <Function> After sealing the cracks through the sealing process, an elastic waterproofing agent is applied to the surface of the sealant and the slope of the U-groove for waterproofing, so rainwater flowing on the outer wall is driven away from the inner wall surface of the U-groove. It can prevent it from penetrating into the body. In addition, this waterproofing agent has excellent elasticity, so if the protective material expands or contracts due to changes in outside temperature after treatment, the waterproof layer itself will also expand or contract accordingly, so the waterproof layer will not separate from the skin. Does not lift or crack. Furthermore, since the U-groove is filled with elastic mortar having excellent elasticity, it is possible to prevent cracks from occurring in the filled portion due to fluctuations in the substrate. <Example> Examples of the present invention will be described below based on the drawings. First, when a crack 11 occurs on the outer wall of the substrate A, the crack 11 is removed and a U groove 1 with a U-shaped cross section is formed.
A chiseling process is performed to provide 2. A silicone or urethane sealant 13 is applied to the deep part of the U-groove 12, that is, along the crack 11, and the crack 1 is removed.
Perform a sealing process to close 1. Next, apply the sealant 13 and the inner wall surface 14 of the U groove 12.
Waterproofing treatment is performed by applying an elastic waterproofing agent 15 having excellent elasticity. The elastic waterproofing agent 15 has an acrylic ester copolymer resin as a main component, and the concentration of the resin is
Mix 50% and Portland cement at a weight ratio of 1:1. The general properties of the acrylic ester copolymer resin are as follows. (Properties of emulsion) Viscosity Approx. 8000cp (BH type, 4rpm, 25℃) PH 6.5-8.5 Ionicity Anion particle size Approx. 0.2m Freeze-thaw stability -18℃ High temperature stability Good (50℃ x 1 month) Pigment miscibility Good minimum film forming temperature 0℃ or less (film properties) Appearance Translucent, highly elastic, soft and sticky Strength approx. 5.0 Kgf/ cm2 Elongation approx. 2000% Water permeability test for elastic waterproofing agent 15 Water passes through easily The test results were obtained by applying water pressure under the following conditions to a test piece in which elastic waterproofing agent 15 was applied to a film thickness of 2 mm on a concrete filter plate.
【表】
けた 漏水なし
弾性防水剤１５の降雨試験
４×４×４cmのモルタル角柱に弾性防水剤１５
を２回塗布し、膜厚を２mmとしたもので、塗布
180分後に水圧1.5気圧の水シヤワーで５分間注
水。このテストでも、表面には何らの傷も異常も
発生しなかつた。
弾性防水剤１５は、このように優れた防水性を
有するため、外壁を流下した雨水がＵ溝１２の内
壁面１４から、駆体Ａ内に毛細管現象によつて水
が浸透することはない。
最後に弾性を有する弾性モルタル１６をＵ溝１
２内に充填して、これを埋める充填工程を行う。
弾性モルタル１６は、アクリル酸エステル共重合
樹脂にポルトランドセメントと砂とを重量比で、
１：２：６の割合で混合して調整する。弾性モル
タル１６を膜厚1.0mmに塗布した塗膜の引伸強度
と引張伸度は、つぎの通りである。
引張強度（Kgｆ／cm）
測定温度 20℃ 17
測定温度 −10℃ 42
引張伸度（％）
測定温度 20℃ 350
測定温度 −10℃ 170
弾性モルタル１６は、このような優れた引張強
度と引張伸度を有するので、充填後駆体Ａに変動
が生じても、これに応じて弾性モルタル１６も伸
縮するため、ひび割れしたり、駆体Ａから肌離れ
することもない。
＜発明の効果＞
本発明は以上説明したように、ひび割れをシー
リング剤によつて塞いだのち、上記シーリング剤
の表面とＵ溝の内壁面とに弾性防水剤を塗布する
ため、塗布後雨水がＵ溝の内壁面より駆体内に浸
透することはない。またこの弾性防水剤は優れた
弾性を有するので、外気温の変化等によつて駆体
が多少伸縮することがあつても、この変動に応じ
て防水層も伸縮するため、ひび割れが生ずること
もない。また、Ｕ溝を充填するモルタルも弾性モ
ルタルとしたので、駆体の変動によつてひび割れ
したり、駆体から剥離しないので、従来の補修方
法のように補修後再び浸水事故がおこる虞れは全
くない。[Table] Rainfall test of Elastic Waterproofing Agent 15 without water leakage Elastic Waterproofing Agent 15 on a 4 x 4 x 4 cm mortar square column
was applied twice to a film thickness of 2 mm.
After 180 minutes, water was injected for 5 minutes using a water shower with a water pressure of 1.5 atm. Even in this test, no scratches or abnormalities occurred on the surface. Since the elastic waterproofing agent 15 has such excellent waterproof properties, rainwater flowing down the outer wall does not penetrate into the substrate A from the inner wall surface 14 of the U-groove 12 due to capillary action. Finally, apply elastic mortar 16 to the U groove 1.
2 and performs a filling process to bury it.
Elastic mortar 16 consists of acrylic ester copolymer resin, portland cement, and sand in a weight ratio.
Adjust by mixing in a ratio of 1:2:6. The tensile strength and tensile elongation of a coating film coated with elastic mortar 16 to a thickness of 1.0 mm are as follows. Tensile strength (Kgf/cm) Measurement temperature 20℃ 17 Measurement temperature -10℃ 42 Tensile elongation (%) Measurement temperature 20℃ 350 Measurement temperature -10℃ 170 Elastic mortar 16 has such excellent tensile strength and tensile elongation. Since the elastic mortar 16 also expands and contracts in response to fluctuations in the filled precursor A, it will not crack or separate from the precursor A. <Effects of the Invention> As explained above, the present invention seals cracks with a sealant and then applies an elastic waterproofing agent to the surface of the sealant and the inner wall surface of the U groove, so that rainwater does not leak out after application. It does not penetrate into the substrate from the inner wall surface of the U-groove. In addition, this elastic waterproofing agent has excellent elasticity, so even if the coating material expands and contracts slightly due to changes in outside temperature, the waterproof layer will also expand and contract in response to this change, so cracks will not occur. do not have. In addition, since the mortar filling the U-groove is made of elastic mortar, it will not crack or peel off from the base due to fluctuations in the base, so there is no risk of a flooding accident occurring again after repair, unlike with conventional repair methods. Not at all.
第１図は本発明によるひび割れの補修方法を示
す説明用断面図、第２図は毛細管高Ｈと管経ｄと
の関係を示す図表、第３図は従来の補修方法を示
す説明用断面図である。
１１……ひび割れ、１２……Ｕ溝、１３……シ
ーリング剤、１４……内壁面、１５……弾性防水
剤、１６……弾性モルタル、Ａ……駆体。
Fig. 1 is an explanatory sectional view showing the crack repair method according to the present invention, Fig. 2 is a diagram showing the relationship between capillary height H and pipe diameter d, and Fig. 3 is an explanatory sectional view showing the conventional repair method. It is. 11...Crack, 12...U groove, 13...Sealing agent, 14...Inner wall surface, 15...Elastic waterproofing agent, 16...Elastic mortar, A...Precursor.
Claims (1)
れをはつてＵ溝を設けるはつり工程と、ひび割れ
にシーリング剤を塗布してひび割れを塞ぐシーリ
ング工程と、前記シーリング剤の内表面とＵ溝の
内壁面とにアクリル酸エステル共重合樹脂を主成
分とし、該樹脂の濃度50％のものに、ポルトラン
ドセメントを重量比で１：１の割合で混合してな
る弾性防水剤を塗布して防水処理を施す防水工程
と、Ｕ溝内にアクリル酸エステル共重合樹脂にポ
ルトランドセメントと砂とを重量比で１：２：６
の割合で混合してなる弾性モルタルを充填してＵ
溝を埋める充填工程とよりなることを特徴とする
鉄筋コンクリート建物外壁のひび割れ補修方法。1. A chisel process to remove cracks in the outer wall of a reinforced concrete building to form a U-groove, a sealing process to seal the crack by applying a sealant to the crack, and an acrylic coating on the inner surface of the sealant and the inner wall surface of the U-groove. A waterproofing process in which an elastic waterproofing agent made of acid ester copolymer resin as the main component and a 50% concentration of the resin mixed with Portland cement at a weight ratio of 1:1 is applied for waterproofing. , acrylic ester copolymer resin, Portland cement and sand in a weight ratio of 1:2:6 in the U groove.
U is filled with elastic mortar mixed in the proportion of
A method for repairing cracks in the outer wall of a reinforced concrete building, comprising a filling process for filling grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5356585A JPS61211456A (en) | 1985-03-18 | 1985-03-18 | Repairing of cracking of outer wall of reinforced concrete building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5356585A JPS61211456A (en) | 1985-03-18 | 1985-03-18 | Repairing of cracking of outer wall of reinforced concrete building |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61211456A JPS61211456A (en) | 1986-09-19 |
| JPH0417268B2 true JPH0417268B2 (en) | 1992-03-25 |
Family
ID=12946342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5356585A Granted JPS61211456A (en) | 1985-03-18 | 1985-03-18 | Repairing of cracking of outer wall of reinforced concrete building |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61211456A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5248823A (en) * | 1975-10-16 | 1977-04-19 | Kubo Toso Kogyo Kk | Repairing process for tanks |
| JPS583111A (en) * | 1981-06-30 | 1983-01-08 | Fujitsu Ltd | Diagnostic system for magnetic recorder |
| JPS5826165A (en) * | 1981-08-06 | 1983-02-16 | コニシ株式会社 | Repairing of water leakage of concrete structure |
-
1985
- 1985-03-18 JP JP5356585A patent/JPS61211456A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5248823A (en) * | 1975-10-16 | 1977-04-19 | Kubo Toso Kogyo Kk | Repairing process for tanks |
| JPS583111A (en) * | 1981-06-30 | 1983-01-08 | Fujitsu Ltd | Diagnostic system for magnetic recorder |
| JPS5826165A (en) * | 1981-08-06 | 1983-02-16 | コニシ株式会社 | Repairing of water leakage of concrete structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61211456A (en) | 1986-09-19 |
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