JP2014218826A - Crack repairing method and crack repairing material - Google Patents

Crack repairing method and crack repairing material Download PDF

Info

Publication number
JP2014218826A
JP2014218826A JP2013098434A JP2013098434A JP2014218826A JP 2014218826 A JP2014218826 A JP 2014218826A JP 2013098434 A JP2013098434 A JP 2013098434A JP 2013098434 A JP2013098434 A JP 2013098434A JP 2014218826 A JP2014218826 A JP 2014218826A
Authority
JP
Japan
Prior art keywords
crack
repair material
crack repair
repairing
pouring
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
Application number
JP2013098434A
Other languages
Japanese (ja)
Other versions
JP6232737B2 (en
Inventor
利充 小林
Toshimitsu Kobayashi
利充 小林
安浩 渕田
Yasuhiro Fuchida
安浩 渕田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Obayashi Corp
Original Assignee
Obayashi Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Obayashi Corp filed Critical Obayashi Corp
Priority to JP2013098434A priority Critical patent/JP6232737B2/en
Publication of JP2014218826A publication Critical patent/JP2014218826A/en
Application granted granted Critical
Publication of JP6232737B2 publication Critical patent/JP6232737B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00Working measures on existing buildings
    • E04G23/02Repairing, e.g. filling cracks; Restoring; Altering; Enlarging

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)

Abstract

PROBLEM TO BE SOLVED: To enable a crack to be repaired by easily filling the crack with a crack repairing material.SOLUTION: A crack repairing method includes a crack repairing material production step of producing a crack repairing material by mixing blended cement, an aqueous resin, water and an admixture for improving fluidity, and a pouring step of pouring the crack repairing material into a crack.

Description

本発明は、ひび割れ補修方法、および、ひび割れ補修材に関する。   The present invention relates to a crack repair method and a crack repair material.

工場の床や倉庫の床は、直仕上げや一体型無機系硬質床仕上げ仕様のコンクリート床スラブであることが多い。このようなコンクリート床スラブは、コンクリート表面から乾燥しやすいため、乾燥収縮ひび割れが発生しやすい。特に工場や倉庫では、車両が走行することもあり、コンクリート表面が徐々に劣化し、ひび割れ部から角欠けを起こして小片の剥離が発生する。そのため、角欠けの恐れがあるひび割れは補修が必要となる。   Factory floors and warehouse floors are often concrete floor slabs with direct finishing or integrated inorganic hard floor finishing specifications. Since such a concrete floor slab is easily dried from the concrete surface, drying shrinkage cracks are likely to occur. Especially in factories and warehouses, vehicles may travel, and the concrete surface gradually deteriorates, causing corner chipping from the cracked parts and peeling of small pieces. For this reason, cracks that may cause corner breakage need to be repaired.

ひび割れの補修方法としては、流動性の低いエポキシ樹脂を手動ガンで注入する注入補修が採用されることが多い。しかしながら、手動ガンによる注入補修では多くの時間を要するという問題があった。特に、工場や倉庫においては、操業しながら補修を行わなければならないことも多く、短工期で終えることができる補修工法が求められていた。すなわち、ひび割れに容易にひび割れ補修材を充填して補修が行えるようにすることが望まれる。   As a crack repair method, injection repair in which an epoxy resin having low fluidity is injected with a manual gun is often employed. However, there is a problem that it takes a lot of time to repair injection with a manual gun. In particular, in factories and warehouses, there are many cases where repairs must be performed while operating, and there has been a demand for repair methods that can be completed in a short construction period. In other words, it is desired that the crack can be easily filled with a crack repair material so that the repair can be performed.

本発明は、このような事情に鑑みてなされたものであり、ひび割れに容易にひび割れ補修材を充填して補修が行えるようにすることを目的とする。   The present invention has been made in view of such circumstances, and an object of the present invention is to easily repair a crack by filling the crack repair material.

このような目的を達成するために本発明に係るひび割れ補修方法は、混合セメントと樹脂と水と流動性を向上させる混和剤とを混合してひび割れ補修材を製造するひび割れ補修材製造工程と、前記ひび割れ補修材をひび割れに流し込む流し込み工程と、を備えることを特徴とする。
このように、ひび割れ補修材に流動性を向上させる混和剤を混合しているので、流動性の高いひび割れ補修材を製造することができる。そして、このひび割れ補修材をひび割れに流し込むことで容易にひび割れにひび割れ補修材を充填して、ひび割れを補修することができる。
In order to achieve such an object, the crack repair method according to the present invention includes a crack repair material manufacturing process for manufacturing a crack repair material by mixing a mixed cement, a resin, water, and an admixture that improves fluidity, and A pouring step of pouring the crack repair material into the crack.
Thus, since the crack repair material is mixed with an admixture that improves fluidity, a crack repair material with high fluidity can be manufactured. Then, by pouring the crack repair material into the crack, the crack repair material can be easily filled into the crack, and the crack can be repaired.

また、本発明に係るひび割れ補修方法において、前記混合セメントは、セメント粉体と高炉スラグ微粉末を含むことを特徴とする。
このように、混合セメントが高炉スラグ被粉末を含むため、流動性の高いひび割れ補修材を用いることができる。そして、容易にひび割れにひび割れ補修材を流し込んで補修を行うことができる。
In the crack repairing method according to the present invention, the mixed cement includes cement powder and blast furnace slag fine powder.
Thus, since the mixed cement contains blast furnace slag powder, a highly fluid crack repair material can be used. And it can repair easily by pouring a crack repair material into a crack.

また、本発明に係るひび割れ補修方法において、前記混合セメントのブレーン値が4,000〜8,000cm/gであることを特徴とする。
このように、混合セメントのブレーン値が高いため、流動性の高いひび割れ補修材を用いることができる。そして、容易にひび割れにひび割れ補修材を流し込んで補修を行うことができる。
In the crack repairing method according to the present invention, the mixed cement has a brain value of 4,000 to 8,000 cm 2 / g.
Thus, since the brane value of the mixed cement is high, a crack repair material with high fluidity can be used. And it can repair easily by pouring a crack repair material into a crack.

また、本発明に係るひび割れ補修方法において、前記水性樹脂は、アクリル樹脂エマルジョンを含むことを特徴とする。
このように、水性樹脂としてアクリル樹脂エマルジョンを含むようにすることで、乾燥してエマルジョンの水が消失することにより、アクリル樹脂が接着性能を発揮し、硬化後の補修部分において高い強度を発現させることができる。
In the crack repairing method according to the present invention, the aqueous resin contains an acrylic resin emulsion.
Thus, by including an acrylic resin emulsion as an aqueous resin, the acrylic resin exhibits adhesive performance by drying and the water of the emulsion disappears, and expresses high strength in the repaired part after curing. be able to.

また、本発明に係るひび割れ補修方法において、前記流動性を向上させる混和剤は、前記ひび割れ補修材のJ14ロート流下時間が2.0〜5.0秒となるように添加されることを特徴とする。
このようにすることで、流動性の高いひび割れ補修材を用いて容易にひび割れを補修することができる。
Moreover, in the crack repairing method according to the present invention, the admixture for improving the fluidity is added so that the flow time of the J14 funnel of the crack repairing material is 2.0 to 5.0 seconds. To do.
By doing in this way, a crack can be easily repaired using the crack repair material with high fluidity.

また、本発明に係るひび割れ補修方法において、前記流動性を向上させる混和剤は、高性能減水剤、AE減水剤、及び、減水剤の少なくともいずれか一つを含むことを特徴とする。
このようにすることで、さらにひび割れ補修材の流動性を向上させることができる。
In the crack repairing method according to the present invention, the admixture for improving the fluidity includes at least one of a high-performance water reducing agent, an AE water reducing agent, and a water reducing agent.
By doing in this way, the fluidity | liquidity of a crack repair material can be improved further.

また、本発明に係るひび割れ補修方法において、前記流し込み工程は複数回行われることを特徴とする。
このようにすることで、確実にひび割れの内部にひび割れ補修材を充填することができる。
In the crack repair method according to the present invention, the pouring step is performed a plurality of times.
By doing in this way, the crack repair material can be reliably filled in the inside of the crack.

また、本発明に係るひび割れ補修方法において、前記流し込み工程の後に、前記ひび割れから出た前記ひび割れ補修材を除去する除去工程を含むことを特徴とする。
このようにすることで、ひび割れ部分の表面に析出した脆弱部分を除去することができるとともに、表面を平坦に仕上げて審美性の高い補修を行うことができる。
Moreover, the crack repairing method according to the present invention is characterized by including a removal step of removing the crack repair material that has come out of the crack after the pouring step.
By doing in this way, while being able to remove the weak part deposited on the surface of a crack part, finishing the surface flat and performing repair with high aesthetics can be performed.

また、本発明に係るひび割れ補修方法において、前記ひび割れ補修材は、水性着色液を含むことを特徴とする。
このようにすることで、ひび割れが生じている母材の色に合わせたひび割れ補修材を用いてひび割れの補修を行うことができる。そして、ひび割れ補修跡をより目立たないようにすることができる。
In the crack repair method according to the present invention, the crack repair material contains an aqueous coloring liquid.
By doing in this way, a crack repair can be performed using the crack repair material matched with the color of the base material in which the crack has arisen. And the crack repair trace can be made less conspicuous.

また、本発明に係るひび割れ補修材は、ひび割れに流し込むことにより前記ひび割れを補修するひび割れ補修材であって、混合セメントと水性樹脂と水と流動性を向上させる混和剤とを混合したことを特徴とする。
このように、ひび割れ補修材に流動性を向上させる混和剤を混合しているので、流動性の高いひび割れ補修材を製造することができる。そして、このひび割れ補修材をひび割れに流し込むことで容易にひび割れにひび割れ補修材を充填して、ひび割れを補修することができる。
The crack repair material according to the present invention is a crack repair material for repairing the crack by pouring into the crack, and is characterized by mixing a mixed cement, an aqueous resin, water, and an admixture that improves fluidity. And
Thus, since the crack repair material is mixed with an admixture that improves fluidity, a crack repair material with high fluidity can be manufactured. Then, by pouring the crack repair material into the crack, the crack repair material can be easily filled into the crack, and the crack can be repaired.

以上のようなひび割れ補修方法、及び、ひび割れ補修材によれば、ひび割れ補修材に流動性を向上させる混和剤を混合しているので、流動性の高いひび割れ補修材を製造することができる。そして、このひび割れ補修材をひび割れに流し込むことで容易にひび割れにひび割れ補修材を充填して、ひび割れを補修することができる。   According to the crack repairing method and the crack repairing material as described above, the crack repairing material with high fluidity can be manufactured because the crack repairing material is mixed with an admixture that improves the fluidity. Then, by pouring the crack repair material into the crack, the crack repair material can be easily filled into the crack, and the crack can be repaired.

J14ロート流下時間のグラフである。It is a graph of J14 funnel flow time. 本実施形態におけるひび割れ補修材を用いたひび割れ保守方法のフローチャートである。It is a flowchart of the crack maintenance method using the crack repair material in this embodiment. ひび割れにひび割れ補修材を流し込む様子の説明図である。It is explanatory drawing of a mode that a crack repair material is poured into a crack.

以下に、本実施形態において用いられるひび割れ補修材の性質について、実験結果を参照しつつ説明を行う。表1は、ひび割れ補修材の材料(ポリマーセメントスラリー)を示す表である。表2は、ひび割れ補修材の調合割合を示す表である。   Below, the property of the crack repair material used in this embodiment is demonstrated, referring an experimental result. Table 1 shows the crack repair material (polymer cement slurry). Table 2 is a table | surface which shows the mixture ratio of a crack repair material.

Figure 2014218826
Figure 2014218826

Figure 2014218826

表1に示す材料を表2に示す調合割合で混合する。混合は、高速攪拌機を用いて、水(混和剤を含む)とB材を攪拌しながら、A材を投入して90秒程度攪拌して行われた。調合割合は、上記のようにNo.1からNo.3の3種類のものが用意された。なお、攪拌中に気泡が発生した場合には、できるだけ気泡を除去することとした。
Figure 2014218826

The materials shown in Table 1 are mixed at the blending ratio shown in Table 2. The mixing was performed using a high-speed stirrer while stirring water (including an admixture) and B material and adding A material and stirring for about 90 seconds. The blending ratio is No. 1 to No. Three types of 3 were prepared. When bubbles were generated during stirring, the bubbles were removed as much as possible.

このように調合されたNo.1からNo.3のひび割れ補修材を、ひび割れを発生させた供試体に流し込む実験を行った。ひび割れを発生させた供試体は、φ10×20cmの円柱である。また、供試体は、24−18−20Nで調合されたコンクリートを用いて作製された。そして、所定の材齢で供試体を割裂させ、円柱上面側にひび割れを発生させた。なお、割裂させる際に載荷速度を調整し、0.1mm、0.2mm、0.3mm、及び、0.45mmのひび割れ幅を有する供試体を作成した。   No. prepared in this way. 1 to No. An experiment was conducted in which the crack repair material No. 3 was poured into the specimen in which the crack was generated. The specimen in which the crack was generated is a cylinder of φ10 × 20 cm. Moreover, the test body was produced using the concrete mix | blended with 24-18-20N. Then, the specimen was split at a predetermined age, and cracks were generated on the upper surface side of the cylinder. In addition, the loading speed was adjusted when splitting, and specimens having crack widths of 0.1 mm, 0.2 mm, 0.3 mm, and 0.45 mm were created.

表3及び表4は、本実施形態におけるひび割れ補修材の流動性試験結果である。また、図1は、J14ロート流下時間のグラフである。これらは所謂フレッシュ性状を表すものである。流動性試験(表中の「J14ロート」)については、土木学会規準のコンクリート標準示方書の充填モルタルの流動性試験方法(案)(JSCE−F 541−2010)を用いた。ここで、表3及び表4で、それぞれ同じ調合割合Noのものが示されているのは、実験日を異ならせて2度同じ実験をしたためである。すなわち、表3に示される実験結果と表4に示される実験結果は、実験日こそ異なっているものの同じ実験内容で行われたものである。   Tables 3 and 4 show the fluidity test results of the crack repair material in the present embodiment. FIG. 1 is a graph of the J14 funnel flow time. These represent so-called fresh properties. For the fluidity test ("J14 funnel" in the table), the fluidity test method (draft) for filling mortar (JSCE-F 541-2010) of the Standard Specification for Concrete of the Japan Society of Civil Engineers was used. Here, in Table 3 and Table 4, the thing of the same preparation ratio No is shown because the same experiment was performed twice on different experiment days. In other words, the experimental results shown in Table 3 and the experimental results shown in Table 4 were performed with the same experimental contents although the experiment dates differed.

Figure 2014218826
Figure 2014218826

Figure 2014218826

表3、表4、及び、図1を参照すると、高性能AE減水剤の添加率の増加に伴い、J14ロートによる流動時間は短くなり、流動性が向上する傾向があることが分かる。そのため、流動性が低くなりやすい夏期などに微細なひび割れを充填する場合、高性能AE材を使用することは有効な手法となることが分かる。
Figure 2014218826

Referring to Tables 3 and 4 and FIG. 1, it can be seen that with the increase in the addition rate of the high-performance AE water reducing agent, the flow time by the J14 funnel becomes shorter and the fluidity tends to improve. Therefore, it can be seen that the use of a high-performance AE material is an effective technique when filling fine cracks in summer when the fluidity tends to be low.

なお、水について上記のJ14ロート試験を行った場合、流動時間は約2秒程度であることから、本実施形態におけるひび割れ補修材は高い流動性を有していることが分かる。   In addition, when performing said J14 funnel test about water, since the flow time is about 2 second, it turns out that the crack repair material in this embodiment has high fluidity | liquidity.

表5及び表6は、本実施形態におけるひび割れ補修材の強度性状を表す表である。上記同様に、表5に示される実験結果と表6に示される実験結果は、実験日が異なるのみで同じ実験内容で行われたものである。   Tables 5 and 6 are tables showing the strength properties of the crack repair material in the present embodiment. Similarly to the above, the experimental results shown in Table 5 and the experimental results shown in Table 6 were conducted with the same experimental content except that the experiment dates were different.

Figure 2014218826
Figure 2014218826

Figure 2014218826

表5及び表6を参照すると、材齢1日では高性能AE減水剤を使用しない方が高い強度が得られている。しかしながら、高性能AE減水剤を添加した場合でも、材齢2日では20(N/mm)から25(N/mm)の圧縮強度が得られている。また、材齢28日においては、高性能AE減水剤を使用した方が強度発現性が向上し、80(N/mm)程度の強度が得られた。
Figure 2014218826

Referring to Tables 5 and 6, a high strength is obtained when the high-performance AE water reducing agent is not used at the age of 1 day. However, even when a high-performance AE water reducing agent is added, a compressive strength of 20 (N / mm 2 ) to 25 (N / mm 2 ) is obtained at the age of 2 days. On the other hand, when the material age was 28 days, the use of a high-performance AE water reducing agent improved the strength development, and a strength of about 80 (N / mm 2 ) was obtained.

表7及び表8は、本実施形態におけるひび割れ補修材の充填状況を示す表である。表7及び表8には、上記調合割合No.1からNo.3のときのひび割れ補修材を、前述の供試体(ひび割れ幅が、0.1mm、0.2mm、0.3mm、0.45mm)に流し込んだときにひび割れ補修材が到達した深さ(注入深さ)が示されている。なお、上記同様に、表7に示される実験結果と表8に示される実験結果は、実験日が異なるのみで同じ実験内容で行われたものである。   Tables 7 and 8 are tables showing the filling status of the crack repair material in the present embodiment. In Tables 7 and 8, the above-mentioned blending ratio No. 1 to No. The depth at which the crack repair material reached when the crack repair material at the time of 3 was poured into the above-mentioned specimen (crack width 0.1 mm, 0.2 mm, 0.3 mm, 0.45 mm) (injection depth) Is shown). Similarly to the above, the experimental results shown in Table 7 and the experimental results shown in Table 8 were conducted with the same experimental content except that the experimental dates were different.

従来、ポリマーセメントスラリーは粘性が高いため、一般に細かいひび割れへの注入は困難であり、ひび割れ幅0.4mm以上に注入することが多かった。一方、今回の実施形態ではより細かいひび割れにも注入することができる。   Conventionally, since polymer cement slurry has high viscosity, it is generally difficult to inject into fine cracks, and in many cases, it is injected into crack widths of 0.4 mm or more. On the other hand, in this embodiment, the fine cracks can be injected.

Figure 2014218826
Figure 2014218826

Figure 2014218826

ひび割れ幅が0.1mmの場合は、高性能AE減水剤を添加したことによる注入深さの改善は確認できない。一方、ひび割れ幅が0.2mm以上では、高性能AE減水剤を添加することで、ひび割れ補修材の注入深さをより深くできることが確認できる。
Figure 2014218826

When the crack width is 0.1 mm, the improvement of the injection depth due to the addition of the high-performance AE water reducing agent cannot be confirmed. On the other hand, when the crack width is 0.2 mm or more, it can be confirmed that the injection depth of the crack repair material can be increased by adding a high-performance AE water reducing agent.

また、ひび割れの補修が必要となる0.3mmのひび割れ幅においては、高性能AE減水剤を添加しない場合で深さ40mm程度までひび割れ補修材を注入できている。また、高性能AE減水剤を添加した場合には、深さ60mmから80mm程度までひび割れ補修材を注入できている。   Moreover, in the crack width of 0.3 mm which requires repair of a crack, the crack repair material can be injected to a depth of about 40 mm without adding a high-performance AE water reducing agent. In addition, when a high-performance AE water reducing agent is added, a crack repair material can be injected from a depth of about 60 mm to about 80 mm.

以上のように、上記のような調合割合No.1からNo.3のひび割れ補修材によれば、表層部において幅0.2mm以上のひび割れに流し込むだけで深さ20mm程度までひび割れ補修材を充填することができる。また、いずれの調合割合であっても、50(N/mm)の圧縮強度を有するひび割れ補修材を提供することができる。 As described above, the above-mentioned blending ratio No. 1 to No. According to the crack repair material of No. 3, it is possible to fill the crack repair material to a depth of about 20 mm simply by pouring into a crack having a width of 0.2 mm or more in the surface layer portion. Moreover, even if it is any mixing ratio, the crack repair material which has the compressive strength of 50 (N / mm < 2 >) can be provided.

なお、上記実施形態において、混合セメントであるA材は、セメント粉体に高炉スラグ微粉末を含む混合セメントであることが望ましい。また、これ以外にも、ポルトランドセメントにフライアッシュ等の微粉末を含む無機系の粉体であってもよい。ここで、混合セメントであるA材のブレーン値は、3,000〜10,000(cm/g)であり、好ましくは、4,000〜8,000(cm/g)である。 In addition, in the said embodiment, it is desirable for the A material which is a mixed cement to be a mixed cement which contains blast furnace slag fine powder in cement powder. In addition, inorganic powder containing fine powder such as fly ash in Portland cement may be used. Here, the brane value of the A material which is the mixed cement is 3,000 to 10,000 (cm 2 / g), preferably 4,000 to 8,000 (cm 2 / g).

また、本実施形態におけるB材は、アクリル樹脂の微粒子を含む。よって、B材を水と混合することによって、水性樹脂の一つであるアクリル樹脂エマルジョンとなる。アクリル樹脂エマルジョンは、アクリル樹脂の微粒子(0.数ミクロン程度)を水の中に分散させたものである。このようなアクリル樹脂エマルジョンは、乾燥などによりエマルジョンの水が消失することによって、残されたアクリル樹脂同士が接着性能を発揮する。そして、硬化後のひび割れ補修材に高い強度を発現させることができる。   Further, the B material in the present embodiment includes fine particles of acrylic resin. Therefore, by mixing the B material with water, an acrylic resin emulsion which is one of the aqueous resins is obtained. The acrylic resin emulsion is obtained by dispersing fine particles (approximately several microns) of acrylic resin in water. In such an acrylic resin emulsion, the water of the emulsion disappears due to drying or the like, so that the remaining acrylic resins exhibit bonding performance. And high intensity | strength can be expressed in the crack repair material after hardening.

また、上記実施形態において、高性能AE減水剤は、主成分としてポリカルボン酸系化合物を含む。また、塩化物イオン(Cl)量は、0.03%であり、アルカリ量が0.3%であり、密度が1.03〜1.07(g/cm)であった。 Moreover, in the said embodiment, a high performance AE water reducing agent contains a polycarboxylic acid type compound as a main component. Moreover, the amount of chloride ions (Cl ) was 0.03%, the alkali amount was 0.3%, and the density was 1.03 to 1.07 (g / cm 3 ).

また、流動性を向上させる化学混和剤として上記高性能AE減水剤を採用したが、他社の高性能AE減水剤を採用することもできる。また、化学混和剤は高性能AE減水剤に限られず、AE減水剤や減水剤を採用することもできる。   Moreover, although the said high performance AE water reducing agent was employ | adopted as a chemical admixture which improves fluidity | liquidity, the high performance AE water reducing agent of another company can also be employ | adopted. Further, the chemical admixture is not limited to a high-performance AE water reducing agent, and an AE water reducing agent or a water reducing agent can also be employed.

また、上記結果によれば高性能AE減水剤などの化学混和剤を添加することが望ましいのであるが、添加量を増加させすぎるとひび割れ補修材自体が分離するおそれがある。そのため、ひび割れ補修材のJ14ロート流下時間が2.0秒から5.0秒の範囲となる程度に化学混和剤を添加することが望ましい。   Further, according to the above results, it is desirable to add a chemical admixture such as a high-performance AE water reducing agent. However, if the amount added is excessively increased, the crack repair material itself may be separated. Therefore, it is desirable to add the chemical admixture so that the J14 funnel flow time of the crack repair material is in the range of 2.0 seconds to 5.0 seconds.

また、上記調合において水量を1.1kgとしたが、0.9kg〜1.1kgの範囲内で水量を調節することもできる。なお、この範囲よりも水量を増量すると強度が低下し、この範囲よりも水量を減量すると流動性が低下する。   Moreover, although the amount of water was 1.1 kg in the said preparation, the amount of water can also be adjusted within the range of 0.9 kg to 1.1 kg. In addition, when the amount of water is increased from this range, the strength decreases, and when the amount of water is decreased from this range, the fluidity decreases.

図2は、本実施形態におけるひび割れ補修材を用いたひび割れ補修方法のフローチャートである。図3は、ひび割れにひび割れ補修材を流し込む様子の説明図である。図3には、ひび割れ補修材1が貯留されたポリ容器10と、ひび割れ部5が示されている。以下、これらの図を参照しつつ、本実施形態におけるひび割れ補修方法について説明する。   FIG. 2 is a flowchart of a crack repair method using a crack repair material in the present embodiment. FIG. 3 is an explanatory view of a state in which a crack repair material is poured into the crack. FIG. 3 shows a plastic container 10 in which the crack repair material 1 is stored and a crack portion 5. Hereinafter, the crack repairing method in the present embodiment will be described with reference to these drawings.

最初に、ひび割れ補修材1を製造する(S102)。ひび割れ補修材の製造方法は、既に説明したとおりであるので説明を省略する。製造されるひび割れ補修材は、前述の調合割合No.1からNo.3のいずれのものであってもよい。   First, the crack repair material 1 is manufactured (S102). Since the method for manufacturing the crack repair material has already been described, the description thereof is omitted. The crack repair material produced is the above-mentioned blending ratio No. 1 to No. Any of 3 may be sufficient.

次に、ひび割れ部5の清掃を行う(S104)。ひび割れ部5の清掃を行うのは、後述するようにひび割れ補修材1の流し込みを円滑に行うためである。次に、ひび割れ部5の水湿しを行う(S106)。ひび割れ部5の水湿しは、ひび割れ部5に少量の水を流し込むことにより行われる。このようにすることで、後にひび割れ部5にひび割れ補修材1を流し込んだ際に、ひび割れ補修材1の水分がひび割れ部5に吸収されてしまうことを抑制することができる。そして、ひび割れ補修材1の水分率の減少を抑制することで、ひび割れ5内において水和反応が生じにくくなってしまうことを防止することができる。また、水湿しを行うことにより、ひび割れ部5におけるひび割れ補修材1の表面張力を下げることができる。そして、後述する流し込み工程において、より円滑にひび割れ補修材1をひび割れ部5に流し込むことができる。   Next, the cracked portion 5 is cleaned (S104). The reason for cleaning the cracked portion 5 is to smoothly flow the crack repair material 1 as described later. Next, the cracked portion 5 is wetted with water (S106). The dampening of the cracked portion 5 is performed by pouring a small amount of water into the cracked portion 5. By doing in this way, when the crack repair material 1 is poured into the crack part 5 later, it can suppress that the water | moisture content of the crack repair material 1 will be absorbed by the crack part 5. FIG. And it can prevent that it becomes difficult to produce a hydration reaction in the crack 5 by suppressing the reduction | decrease of the moisture content of the crack repairing material 1. FIG. Moreover, the surface tension of the crack repairing material 1 in the crack part 5 can be lowered by dampening with water. And the crack repair material 1 can be more smoothly poured into the crack part 5 in the pouring process mentioned later.

次に、ひび割れ部5にひび割れ補修材1を流し込む流し込み工程が行われる(S108)。作業者は、ポリ容器10を把持し、ポリ容器10内のひび割れ補修材1をひび割れ部5に沿って流し込む(図3)。前述のように、ひび割れ補修材1は、高い流動性を有するので、このような流し込み工法によってもひび割れ5部の深部にまで容易に充填することができる。   Next, a pouring process for pouring the crack repair material 1 into the crack portion 5 is performed (S108). The operator holds the plastic container 10 and pours the crack repair material 1 in the plastic container 10 along the cracked portion 5 (FIG. 3). As described above, since the crack repair material 1 has high fluidity, it can be easily filled up to the deep part of the crack by such a casting method.

ひび割れ補修材1の流し込みは、複数回に分けて行うことができる。これは、高い流動性を有するひび割れ補修材1であっても、ひび割れ部5の深部にまで到達するには幾分の時間を要するためである。   The crack repair material 1 can be poured into a plurality of times. This is because even if the crack repair material 1 has high fluidity, it takes some time to reach the deep part of the crack part 5.

また、ひび割れ補修材1を流し込むにあたり、不図示のヘラを用いて床面のひび割れ補修材1をひび割れ5に寄せることで、ひび割れ部5内にひび割れ補修材1を流入させることもできる。すなわち、ヘラでひび割れ補修材1をひび割れ5に流し込むことも流し込み工程に含まれる。仮に、ひび割れ補修材1が有する表面張力によってひび割れ5内に流入しにくい状況であっても、このようにヘラを用いることで、その表面張力に打ち勝ってひび割れ補修材1をひび割れ5内に流入させることができる。   Further, when the crack repair material 1 is poured, the crack repair material 1 can be caused to flow into the crack portion 5 by bringing the crack repair material 1 on the floor surface toward the crack 5 using a spatula (not shown). That is, pouring the crack repair material 1 into the crack 5 with a spatula is also included in the pouring step. Even if it is difficult to flow into the crack 5 due to the surface tension of the crack repair material 1, the crack repair material 1 is caused to flow into the crack 5 by overcoming the surface tension by using the spatula in this way. be able to.

上記のように、ひび割れ補修材1の流し込みが完了すると、ひび割れ部5内に入らなかったひび割れ補修材1は、数時間後に床上面で盛り上がって凝結する。また、ひび割れ部5からはブリージングも発生する。そこで、床上面で盛り上がって凝結した脆弱性の高いひび割れ補修材1を除去する(S110)。この除去においてはスクレイパーで削り取るなどの手法を採用することができる。その後、ひび割れ部5周辺をウェスで拭き取り、清掃する(S112)。   As described above, when the pouring of the crack repair material 1 is completed, the crack repair material 1 that has not entered the crack portion 5 rises and condenses on the floor surface after several hours. Further, breathing also occurs from the cracked portion 5. Therefore, the highly fragile crack repair material 1 that is raised and condensed on the upper surface of the floor is removed (S110). In this removal, a method such as scraping with a scraper can be employed. Then, the crack part 5 periphery is wiped off with a waste cloth and cleaned (S112).

無機系硬質床仕上げのひび割れ補修において、従来であれば、エポキシ樹脂による注入工法が採用されることが多かった。エポキシ樹脂は粘度が高いため、手動ガンなどでひび割れに注入しなければならず、仮シール材での漏れ防止のため、シール材硬化までの養生工程、注入後のシール材除去工程などの作業に多くの時間を要していた。また、エポキシ樹脂で補修を行うと、床の無機系材料に対して樹脂を用いることから、その素材の違いにより注入口付近に補修跡が目立つという問題もあった。   Conventionally, in the repair of cracks in inorganic hard floor finishes, an epoxy resin injection method has often been employed. Since epoxy resin has a high viscosity, it must be injected into cracks with a manual gun, etc., and in order to prevent leaks with temporary seal materials, it can be used for the curing process until the seal material hardens, and the sealing material removal process after injection. It took a lot of time. In addition, when repair is performed with an epoxy resin, since the resin is used for the inorganic material of the floor, there is also a problem that the repair mark is conspicuous in the vicinity of the inlet due to the difference in the material.

これに対し、本実施形態におけるひび割れ補修方法であれば、流動性の高いひび割れ補修材1をひび割れ5に流し込むだけであるので、仮シール処理も不要であり、一体型無機系硬質床仕上げにおける有害なひび割れに対して多くの時間を要することなくひび割れ補修を行うことができる。すなわち、短工期で補修を行うことができるので、操業中の工場や倉庫において補修を行うことができる。   On the other hand, the crack repair method according to the present embodiment merely pours the crack repair material 1 having high fluidity into the crack 5, so that a temporary sealing process is not necessary, which is harmful in an integrated inorganic hard floor finish. Crack repair can be performed without much time for cracks. That is, since repair can be performed in a short work period, repair can be performed in a factory or warehouse in operation.

また、上記手法であれば、ひび割れ幅0.2mm以上のひび割れに流し込み工法で深さ20mm程度までひび割れ補修剤1を充填できる。また、ひび割れ補修材1は、50(N/mm)程度の圧縮強度を有するので、補修後においても、確実に角欠け劣化を防止することができる。 Moreover, if it is the said method, the crack repairing agent 1 can be filled to the depth of about 20 mm by the pouring construction method into the crack of crack width 0.2mm or more. Further, since the crack repair material 1 has a compressive strength of about 50 (N / mm 2 ), it is possible to reliably prevent corner chipping deterioration even after repair.

また、ひび割れ補修剤1は、セメント系の補修材であるため、臭いもなく、補修後もその跡が目立たないという利点がある。   Moreover, since the crack repair agent 1 is a cement-type repair material, there is an advantage that there is no smell and the trace is not conspicuous after repair.

なお、上記実施形態では、平坦な床面を例に説明を行ったが、ひび割れ部5にひび割れ補修材1を流し込むことができれば、傾斜面に生じたひび割れにも適用することができる。   In the above-described embodiment, a flat floor surface has been described as an example. However, if the crack repair material 1 can be poured into the crack portion 5, the present invention can also be applied to a crack generated on the inclined surface.

次に、水性着色液としてのインクで着色したひび割れ補修材1について説明を行う。なお、後述のようなインクで着色したひび割れ補修材1を用いた場合であっても、前述のひび割れ補修方法同様にひび割れ補修材をひび割れ5に流し込むだけでひび割れ部5の補修を行うことができる。   Next, the crack repair material 1 colored with ink as an aqueous coloring liquid will be described. Even when the crack repair material 1 colored with ink as described below is used, the crack portion 5 can be repaired by pouring the crack repair material into the crack 5 in the same manner as the crack repair method described above. .

表9は、ひび割れ補修材1に混合されるインクの成分を示す表である。ここでは、株式会社ブライトンのダイカラー(以下、単に「インク」と言う)を採用した。インク色は工場等で採用されることが多い緑色である。   Table 9 is a table showing the components of the ink mixed in the crack repair material 1. Here, a bright color die color (hereinafter simply referred to as “ink”) was employed. The ink color is green, which is often used in factories and the like.

Figure 2014218826

表10は、インクの添加率を変化させたときにおけるひび割れ保守材1の材齢7日の圧縮強度を表す表である。表において、Pは粉体の重量を表す。ここでは、粉体が300g、樹脂が40g、水が110gとしたときのひび割れ補修材を示している。
Figure 2014218826

Table 10 is a table showing the compressive strength of the crack maintenance material 1 at the age of 7 days when the ink addition rate is changed. In the table, P represents the weight of the powder. Here, the crack repairing material when the powder is 300 g, the resin is 40 g, and the water is 110 g is shown.

Figure 2014218826

表10に示されるように、インクを粉体の15%添加したひび割れ補修材は、0.2mmのひび割れにも流入させることができた。また、このときの圧縮強度は35.8(N/mm)であった。また、インクを粉体の20%添加したひび割れ補修材は、0.3mmのひび割れに流入させることができた。また、このときの圧縮強度は31.3(N/mm)であった。すなわち、コンクリートと同等の強度を発現させることができた。
Figure 2014218826

As shown in Table 10, the crack repair material to which 15% of the powder of the ink was added was able to flow into the 0.2 mm crack. Moreover, the compressive strength at this time was 35.8 (N / mm < 2 >). Moreover, the crack repair material to which 20% of the powder of the ink was added was able to flow into the 0.3 mm crack. Moreover, the compressive strength at this time was 31.3 (N / mm < 2 >). That is, the strength equivalent to that of concrete could be expressed.

このように、インクを含むひび割れ補修材を採用することによって、ひび割れが生じている母材の色に合わせたひび割れ補修材をひび割れ部に流し込むことができる。そして、ひび割れ補修跡をおり目立たないようにすることができる。   Thus, by using the crack repair material containing ink, the crack repair material matched to the color of the base material in which the crack is generated can be poured into the crack portion. And the crack repair mark can be made inconspicuous.

1 ひび割れ補修材、5 ひび割れ部、10 ポリ容器 1 crack repair material, 5 cracked part, 10 plastic container

Claims (10)

混合セメントと水性樹脂と水と流動性を向上させる混和剤とを混合してひび割れ補修材を製造するひび割れ補修材製造工程と、
前記ひび割れ補修材をひび割れに流し込む流し込み工程と、
を備えることを特徴とするひび割れ補修方法。
A crack repair material manufacturing process for manufacturing a crack repair material by mixing a mixed cement, an aqueous resin, water, and an admixture that improves fluidity;
A pouring process for pouring the crack repair material into the crack;
A crack repairing method characterized by comprising:
請求項1に記載のひび割れ補修方法であって、
前記混合セメントは、セメント粉体と高炉スラグ微粉末を含むことを特徴とするひび割れ補修方法。
The crack repair method according to claim 1,
The method for repairing cracks, wherein the mixed cement includes cement powder and fine blast furnace slag powder.
請求項1又は2に記載のひび割れ補修方法であって、
前記混合セメントのブレーン値が4,000〜8,000cm/gであることを特徴とするひび割れ補修方法。
The crack repair method according to claim 1 or 2,
A crack repairing method, wherein the mixed cement has a brain value of 4,000 to 8,000 cm 2 / g.
請求項1乃至請求項3のいずれかに記載のひび割れ補修方法であって、
前記水性樹脂は、アクリル樹脂エマルジョンを含むことを特徴とするひび割れ補修方法。
A crack repair method according to any one of claims 1 to 3,
The method for repairing cracks, wherein the aqueous resin contains an acrylic resin emulsion.
請求項1乃至請求項4のいずれかに記載のひび割れ補修方法であって、
前記流動性を向上させる混和剤は、前記ひび割れ補修材のJ14ロート流下時間が2.0〜5.0秒となるように添加されることを特徴とするひび割れ補修方法。
A crack repair method according to any one of claims 1 to 4,
The method for repairing cracks, wherein the admixture for improving fluidity is added so that the flow time of J14 funnel of the crack repair material is 2.0 to 5.0 seconds.
請求項1乃至請求項5のいずれかに記載のひび割れ補修方法であって、
前記流動性を向上させる混和剤は、高性能減水剤、AE減水剤、及び、減水剤の少なくともいずれか一つを含むことを特徴とするひび割れ補修方法。
A crack repairing method according to any one of claims 1 to 5,
The method for repairing cracks, wherein the admixture for improving fluidity contains at least one of a high-performance water reducing agent, an AE water reducing agent, and a water reducing agent.
請求項1乃至請求項6のいずれかに記載のひび割れ補修方法であって、
前記流し込み工程は複数回行われることを特徴とするひび割れ補修方法。
A crack repairing method according to any one of claims 1 to 6,
The crack repairing method, wherein the pouring step is performed a plurality of times.
請求項1乃至請求項7のいずれかに記載のひび割れ補修方法であって、
前記流し込み工程の後に、前記ひび割れから出た前記ひび割れ補修材を除去する除去工程を含むことを特徴とするひび割れ補修方法。
A crack repairing method according to any one of claims 1 to 7,
The crack repair method characterized by including the removal process which removes the said crack repair material which came out of the said crack after the said pouring process.
請求項1乃至請求項8のいずれかに記載のひび割れ補修方法であって、
前記ひび割れ補修材は、水性着色液を含むことを特徴とするひび割れ補修方法。
A crack repairing method according to any one of claims 1 to 8,
The crack repairing method, wherein the crack repair material contains an aqueous coloring liquid.
ひび割れに流し込むことにより前記ひび割れを補修するひび割れ補修材であって、
混合セメントと水性樹脂と水と流動性を向上させる混和剤とを混合したことを特徴とするひび割れ補修材。
A crack repair material for repairing the crack by pouring into the crack,
A crack repair material characterized by mixing a mixed cement, an aqueous resin, water, and an admixture that improves fluidity.
JP2013098434A 2013-05-08 2013-05-08 Crack repair method Expired - Fee Related JP6232737B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2013098434A JP6232737B2 (en) 2013-05-08 2013-05-08 Crack repair method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2013098434A JP6232737B2 (en) 2013-05-08 2013-05-08 Crack repair method

Publications (2)

Publication Number Publication Date
JP2014218826A true JP2014218826A (en) 2014-11-20
JP6232737B2 JP6232737B2 (en) 2017-11-22

Family

ID=51937541

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2013098434A Expired - Fee Related JP6232737B2 (en) 2013-05-08 2013-05-08 Crack repair method

Country Status (1)

Country Link
JP (1) JP6232737B2 (en)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5736260A (en) * 1980-08-12 1982-02-27 Takenaka Komuten Co JUSHIKONNYUSEMENT OMIRUKUCHUNYUKOHO
JPS6023561A (en) * 1983-07-15 1985-02-06 真砂産業株式会社 Method and joint body for injecting correcting adhesive intoconcrete crack part
JPH05345652A (en) * 1992-06-15 1993-12-27 Nippon Steel Corp Grout material for repairing cross section of concrete
JPH09209577A (en) * 1996-02-01 1997-08-12 Rinotetsuku:Kk Repairing method for concrete crack and its device
JPH10259042A (en) * 1997-03-19 1998-09-29 Nittetsu Cement Co Ltd Cement-based injection material
JP2001247350A (en) * 2000-03-01 2001-09-11 Taiheiyo Cement Corp Repairing material
JP2001248165A (en) * 2000-03-06 2001-09-14 Toagosei Co Ltd Construction method for stabilizing bedrock
JP2002274924A (en) * 2001-03-13 2002-09-25 Taiheiyo Cement Corp Cement repairing material
JP2005154185A (en) * 2003-11-25 2005-06-16 Denki Kagaku Kogyo Kk Grout
JP2007269536A (en) * 2006-03-31 2007-10-18 Sumitomo Osaka Cement Co Ltd Inorganic and elastic crack injection material
JP2009235778A (en) * 2008-03-27 2009-10-15 Sumitomo Osaka Cement Co Ltd Method for identifying repair part, and repair material and method for it
JP2010001195A (en) * 2008-06-20 2010-01-07 Asuton:Kk Method for repairing concrete

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5736260A (en) * 1980-08-12 1982-02-27 Takenaka Komuten Co JUSHIKONNYUSEMENT OMIRUKUCHUNYUKOHO
JPS6023561A (en) * 1983-07-15 1985-02-06 真砂産業株式会社 Method and joint body for injecting correcting adhesive intoconcrete crack part
JPH05345652A (en) * 1992-06-15 1993-12-27 Nippon Steel Corp Grout material for repairing cross section of concrete
JPH09209577A (en) * 1996-02-01 1997-08-12 Rinotetsuku:Kk Repairing method for concrete crack and its device
JPH10259042A (en) * 1997-03-19 1998-09-29 Nittetsu Cement Co Ltd Cement-based injection material
JP2001247350A (en) * 2000-03-01 2001-09-11 Taiheiyo Cement Corp Repairing material
JP2001248165A (en) * 2000-03-06 2001-09-14 Toagosei Co Ltd Construction method for stabilizing bedrock
JP2002274924A (en) * 2001-03-13 2002-09-25 Taiheiyo Cement Corp Cement repairing material
JP2005154185A (en) * 2003-11-25 2005-06-16 Denki Kagaku Kogyo Kk Grout
JP2007269536A (en) * 2006-03-31 2007-10-18 Sumitomo Osaka Cement Co Ltd Inorganic and elastic crack injection material
JP2009235778A (en) * 2008-03-27 2009-10-15 Sumitomo Osaka Cement Co Ltd Method for identifying repair part, and repair material and method for it
JP2010001195A (en) * 2008-06-20 2010-01-07 Asuton:Kk Method for repairing concrete

Also Published As

Publication number Publication date
JP6232737B2 (en) 2017-11-22

Similar Documents

Publication Publication Date Title
AU2013305128B2 (en) Multi-purpose mortar or cement compositions for construction applications
CN107954624A (en) A kind of concrete silicon crystal curing agent
JP6060185B2 (en) Self-leveling concrete
CN106630848B (en) A kind of low frequency vibration compacting concrete
CN104529232B (en) Polycarboxylate composite water reducing agent, preparation method and using method thereof for high carbon content concrete
US20110197789A1 (en) Strontium based solutions and processes for surface hardening of concrete and other cementeous materials and structures made thereby
JP2016023103A (en) Fast curing polymer cement mortar composition for repair reinforcement and repair reinforcement method using the same
WO2020004434A1 (en) Concrete reforming method and reforming material
WO2020015508A1 (en) Method for treating concrete hole or rebar exposure
KR101366294B1 (en) High-fluid, subaqueous non-separated concrete admixture and this adding high-fluid, subaqueous non-separated concrete composition
JP6254440B2 (en) Polymer cement grout material for submarine tunnel repair and repair method for submarine tunnel
CN111217569A (en) Repair mortar and repair construction method for concrete structure damaged part
JP6232737B2 (en) Crack repair method
JP2017210407A (en) Polymer cement mortar and method using polymer cement mortar
JP5155048B2 (en) Method for producing hardened cement concrete
JP2004224631A (en) Polymer hydraulic composition
CN108358559A (en) A kind of concrete and preparation method thereof
KR101590124B1 (en) Pc box culvert concrete composition unnecessary for steam aging and manufacturing method for pc box culvert using the same
KR102283086B1 (en) Color plastering cement composition and Fineg dust reduction method using the plaster finish surface
JP2006274765A (en) Plastic grout made by using ready-mixed concrete sludge and plastic grouting method
JP2002003264A (en) Hydraulic compound
JP2007270464A (en) Cement composition, cement milk, water holding pavement, and method of constructing water holding pavement
CN110668761A (en) Concrete special for hydraulic engineering
JPS62278151A (en) Degradation prevention of set concrete
JP2018002525A (en) Silicate polymer molded body and manufacturing method of silicate polymer molded body

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20160420

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20161214

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20161220

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20170130

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20170130

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20170627

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20170821

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20170926

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20171009

R150 Certificate of patent or registration of utility model

Ref document number: 6232737

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

LAPS Cancellation because of no payment of annual fees