JP2007191584A - Cement-based aerosol product - Google Patents
Cement-based aerosol product Download PDFInfo
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- JP2007191584A JP2007191584A JP2006011159A JP2006011159A JP2007191584A JP 2007191584 A JP2007191584 A JP 2007191584A JP 2006011159 A JP2006011159 A JP 2006011159A JP 2006011159 A JP2006011159 A JP 2006011159A JP 2007191584 A JP2007191584 A JP 2007191584A
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- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
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- 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
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00146—Sprayable or pumpable mixtures
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
Description
本発明は、コンクリートまたはセメントモルタルの補修に利用できるセメント系エアゾール製品、特にコンクリートまたはセメントモルタル表面に発生した微細クラックを補修する際に使用するセメント系エアゾール製品に関する。 The present invention relates to a cement-based aerosol product that can be used for repairing concrete or cement mortar, and more particularly to a cement-based aerosol product that is used when repairing fine cracks generated on the surface of concrete or cement mortar.
従来、コンクリート表面のひび割れ、ジャンカ等の劣化箇所の補修方法としては、セメントに水を加えて練ったセメントミルクなどの補修材を、ひび割れ等のコンクリート劣化箇所の中に注入する工法などが知られている（例えば、特許文献１参照）。 Conventionally, as a method of repairing cracked parts of concrete surfaces, deteriorating parts such as junkers, a method of injecting a repair material such as cement milk added with water into cement into concrete degrading parts such as cracks is known. (For example, refer to Patent Document 1).
しかしながら、上記した従来のコンクリート補修工法では、ひび割れ箇所に補修材注入用の孔を削孔する必要がある場合もあり、装置が大がかりとなる。このため、作業用の仮設構造物などが必要であったり、工事費用も高額となる。また、コンクリート劣化箇所に補修材注入用の孔を削孔すると、当該劣化箇所をさらに傷めることとなり、コンクリート構造物の強度等の観点から好ましくないという問題もあった。また、補修材としてセメントミルクを用いる場合には、注入過程でセメントの水和反応が進行するため、注入作業を短時間で完了させる必要があり、作業に時間的制限がある。さらに、低圧低速注入工法を用いる方法があるが、この方法の場合、コンクリート面を傷つけないが、ゴム、バネや空気圧を利用して注入を行うため、注入時間が長く、注入される材料としては、可使時間（硬化時間）の長いものしか注入できないという問題があった。 However, in the above-described conventional concrete repair method, it may be necessary to drill holes for injecting repair material at cracks, which makes the apparatus large. For this reason, a temporary structure for work is necessary, and the construction cost is high. In addition, if a hole for injecting a repair material is drilled in a concrete deteriorated portion, the deteriorated portion is further damaged, which is not preferable from the viewpoint of the strength of the concrete structure. When cement milk is used as a repair material, the hydration reaction of cement proceeds during the injection process, so the injection operation needs to be completed in a short time, and there is a time limit on the operation. Furthermore, there is a method using a low-pressure low-speed injection method, but in this method, the concrete surface is not damaged, but since the injection is performed using rubber, springs and air pressure, the injection time is long, and the injected material is However, there is a problem that only those having a long pot life (curing time) can be injected.
このため、設備や機器が簡易でコンクリート劣化箇所を傷めることのないコンクリート補修工法に用いる材料として、セメント系エアゾール製品が提案されている。特許文献２には、直径が０．０１ないし３０マイクロメートルのセメント微粒子を格納容器内の液体状の噴射用物質の中に、略均一な状態で分散混入させておき、弁駆動手段の操作により噴射用物質をノズルから噴射ガスにしてセメント微粒子とともに外部に噴射するセメント微粒子噴射装置が提案され、特許文献２では、超速硬セメントと粉末の有機ポリマーを主成分とし、これをエアゾール化したセメントスプレー塗材が提案されている。
しかしながら、セメント系エアゾール製品を噴射して補修する場合に、「粉塵が多い」という問題があり、その問題を解決したセメント系エアゾール製品の開発が望まれていた。
For this reason, cement-based aerosol products have been proposed as materials for use in concrete repair methods that are simple in equipment and equipment and do not damage concrete deterioration sites. In Patent Document 2, cement fine particles having a diameter of 0.01 to 30 micrometers are dispersed and mixed in a liquid injection material in a containment vessel in a substantially uniform state, and the valve drive means is operated. A cement fine particle injection device has been proposed in which an injection substance is injected from a nozzle as a spray gas and is injected to the outside together with cement fine particles. Patent Document 2 discloses a cement spray mainly composed of super fast hard cement and powdered organic polymer, which is aerosolized. Coating materials have been proposed.
However, when repairing by injecting a cement-based aerosol product, there is a problem of “a lot of dust”, and development of a cement-based aerosol product that solves the problem has been desired.
かかる状況に鑑み、本発明は、粉塵の発生量が少ないセメント系エアゾール製品を提供することを目的とする。 In view of this situation, an object of the present invention is to provide a cement-based aerosol product that generates less dust.
本発明者らが鋭意検討を行った結果、超速硬セメントと沸点が１５〜９０℃の有機溶剤を、噴射用ガスとともにエアゾール容器内に充填したセメント系エアゾール製品が上記目的を達成できることが知見された。すなわち、１５〜９０℃の有機溶剤が超速硬セメントの微粒子を湿潤して粉塵化が抑えられることを見出し、本発明を完成した。
また、超速硬セメントに加え、フライアッシュを含有させると、フライアッシュは骨材の役割をしてセメントの乾燥収縮によるひび割れ発生を抑制し、かつ、フライアッシュに含まれる二酸化珪素が水酸化カルシウムと反応して緻密で耐久性に優れたカルシウムシリケート水和物を生成し、補修部分の強度向上に寄与するので好ましい。
As a result of intensive studies by the present inventors, it has been found that a cement-based aerosol product in which an ultrafast cement and an organic solvent having a boiling point of 15 to 90 ° C. are filled in an aerosol container together with a propellant gas can achieve the above-mentioned purpose. It was. That is, the present inventors have found that an organic solvent at 15 to 90 ° C. wets the fine particles of super-hard cement and suppresses dusting, thereby completing the present invention.
When fly ash is included in addition to ultrafast cement, fly ash acts as an aggregate to prevent cracking due to dry shrinkage of the cement, and silicon dioxide contained in fly ash is combined with calcium hydroxide. It is preferable because it reacts to produce a calcium silicate hydrate that is dense and excellent in durability, and contributes to improving the strength of the repaired portion.
すなわち、本発明は
（１）超速硬セメントと沸点が１５〜９０℃の有機溶剤を、噴射用ガスとともにエアゾール容器内に充填したセメント系エアゾール製品；
（２）超速硬セメント１００重量部に対し、沸点が１５〜９０℃の有機溶剤が１０〜１００容量部であることを特徴とする上記（１）のセメント系エアゾール製品；
（３）さらに、フライアッシュを、超速硬セメント１００重量部に対し５０重量部以下の量含む上記（１）のセメント系エアゾール製品；
（４）超速硬セメントとフライアッシュの合計量１００重量部に対し、沸点が１５〜９０℃の有機溶剤が１０〜１００容量部であることを特徴とする上記（３）のセメント系エアゾール製品；
（５）沸点が１５〜９０℃の有機溶剤が、アルコール類、炭化水素類、ハロゲン化炭化水素類、エーテル類、ケトン類から選ばれる１種以上である上記（１）〜（４）のいずれかのセメント系エアゾール製品；
（６）沸点が１５〜９０℃の有機溶剤が、化学式ＣＦ3ＣＦ2ＣＨＣｌ2、ＣＣｌＦ2ＣＦ2ＣＨＣｌＦ、ＣＦ3ＣＨ2ＣＨＦ2、Ｃ5Ｈ2Ｆ10から選ばれる１種以上である上記（１）〜（４）のいずれかのセメント系エアゾール製品；
を提供する。
That is, the present invention is (1) a cement-based aerosol product in which an ultrafast cement and an organic solvent having a boiling point of 15 to 90 ° C. are filled in an aerosol container together with an injection gas;
(2) The cement-based aerosol product according to the above (1), wherein the organic solvent having a boiling point of 15 to 90 ° C. is 10 to 100 parts by volume with respect to 100 parts by weight of the ultrafast cement.
(3) The cement-based aerosol product according to (1), further comprising fly ash in an amount of 50 parts by weight or less with respect to 100 parts by weight of super-hard cement.
(4) The cement-based aerosol product according to (3) above, wherein the organic solvent having a boiling point of 15 to 90 ° C. is 10 to 100 parts by volume with respect to 100 parts by weight of the total amount of the ultrafast cement and fly ash;
(5) Any of the above (1) to (4), wherein the organic solvent having a boiling point of 15 to 90 ° C. is at least one selected from alcohols, hydrocarbons, halogenated hydrocarbons, ethers and ketones Some cement aerosol products;
(6) The organic solvent having a boiling point of 15 to 90 ° C. is one or more selected from the chemical formulas CF 3 CF 2 CHCl 2 , CClF 2 CF 2 CHClF, CF 3 CH 2 CHF 2 , and C 5 H 2 F 10 The cement-based aerosol product of any one of (1) to (4);
I will provide a.
本発明のセメント系エアゾール製品は、簡易にコンクリート劣化箇所を傷めることなく、コンクリート表面のひび割れ、劣化箇所等の補修ができ、その使用において、粉塵の発生量が少なく、作業性がよいという利点を有する。 The cement-based aerosol product of the present invention has the advantage that it can repair cracks, deteriorated parts, etc. on the surface of the concrete without damaging the deteriorated parts of the concrete easily. Have.
本発明のセメント系エアゾール製品は、コンクリート表面の補修箇所に吹きつけるため速硬性が要求されるので、セメントは超速硬セメントを用い、かつ、粉塵の発生を抑制するためにセメントを沸点が１５〜９０℃の有機溶剤で湿潤することが特徴である。 Since the cement-based aerosol product of the present invention is required to be fast-curing because it is sprayed on the repaired portion of the concrete surface, the cement uses a super-hard-hardening cement and has a boiling point of 15 to 15 to suppress the generation of dust. It is characterized by being wetted with an organic solvent at 90 ° C.
本発明のセメント系エアゾール製品に用いるセメントは、超速硬セメントであり、ＪＩＳ Ｒ５２０１に準じて測定された硬化時間(終結時間)が１分〜６０分程度の超速硬セメントであることが好ましい。超速硬セメントとしては、例えば、１１（ＣａＯ）7（Ａｌ2Ｏ3）ＣａＦ2を主成分とする、いわゆるジェットセメント；ポルトランドセメントとアルミナセメントと石膏の３成分から構成される超速硬セメント；アルミナセメント単体などが使用できる。 The cement used in the cement-based aerosol product of the present invention is a super fast hard cement, and is preferably a super fast hard cement having a setting time (termination time) measured according to JIS R5201 of about 1 minute to 60 minutes. As the ultrafast cement, for example, so-called jet cement mainly composed of 11 (CaO) 7 (Al 2 O 3 ) CaF 2 ; ultrafast cement composed of three components of Portland cement, alumina cement and gypsum; alumina Cement alone can be used.
本発明のセメント系エアゾール製品に用いる沸点が１５〜９０℃の有機溶剤としては、
エタノール、メタノールなどのアルコール類、ペンタン、ヘキサンなどの炭化水素類、ジクロロメタン、トリクロロエチレンなどのハロゲン化炭化水素類、ジエチルエーテル、エチルビニルエーテルなどのエーテル類、アセトン、メチルエチルケトンなどのケトン類の１種以上を使用することができる。また、化学式ＣＦ3ＣＦ2ＣＨＣｌ2、ＣＣｌＦ2ＣＦ2ＣＨＣｌＦ、ＣＦ3ＣＨ2ＣＨＦ2、Ｃ5Ｈ2Ｆ10などフルオロカーボン系化合物の１種以上も非危険物という観点で好ましく使用することができる。
As an organic solvent having a boiling point of 15 to 90 ° C. used in the cement-based aerosol product of the present invention,
One or more of alcohols such as ethanol and methanol, hydrocarbons such as pentane and hexane, halogenated hydrocarbons such as dichloromethane and trichloroethylene, ethers such as diethyl ether and ethyl vinyl ether, and ketones such as acetone and methyl ethyl ketone Can be used. In addition, one or more fluorocarbon compounds such as the chemical formulas CF 3 CF 2 CHCl 2 , CClF 2 CF 2 CHClF, CF 3 CH 2 CHF 2 , and C 5 H 2 F 10 can be preferably used from the viewpoint of non-hazardous materials. .
本発明のセメント系エアゾール製品において、超速硬セメントと沸点が１５〜９０℃の有機溶剤の混合割合は、超速硬セメント１００重量部に対し、沸点が１５〜９０℃の有機溶剤が１０〜１００容量部であることが好ましい。有機溶剤が１０容量部以下であると、セメントのすべてを湿潤することができず、噴射時に粉塵の発生を十分に抑えることができず、１００容量部以上であると補修対象部分に付着する超速硬セメントの膜圧が極端に薄くなり付着強度が低下するため好ましくない。 In the cement-based aerosol product of the present invention, the mixing ratio of the ultrafast cement and the organic solvent having a boiling point of 15 to 90 ° C. is 10 to 100 volumes of the organic solvent having a boiling point of 15 to 90 ° C. with respect to 100 parts by weight of the ultrafast cement. Part. If the organic solvent is 10 parts by volume or less, all of the cement cannot be moistened, dust generation cannot be sufficiently suppressed during injection, and if it is 100 parts by volume or more, the super speed that adheres to the repair target part. The film pressure of hard cement becomes extremely thin and the adhesion strength is lowered, which is not preferable.
本発明のセメント系エアゾール製品では、さらに、フライアッシュを含ませることができる。フライアッシュは骨材の役割をしてセメントの乾燥収縮によるひび割れ発生を抑制する。また、超速硬セメントは水和反応によって生じる水酸化カルシウムの量が少ないが、フライアッシュに含まれる二酸化珪素が水酸化カルシウムと反応して緻密で耐久性に優れたカルシウムシリケート水和物を生成して、補修部分の強度向上に寄与するので好ましい。さらに、フライアッシュの形状は球状なので、ひび割れ箇所への充填性に優れる。 The cement-based aerosol product of the present invention can further contain fly ash. Fly ash acts as an aggregate to suppress cracking due to dry shrinkage of cement. In addition, ultrafast cement has a low amount of calcium hydroxide produced by hydration reaction, but silicon dioxide contained in fly ash reacts with calcium hydroxide to produce dense and durable calcium silicate hydrate. This is preferable because it contributes to improving the strength of the repaired portion. Furthermore, since the fly ash has a spherical shape, it is excellent in filling into cracks.
本発明のセメント系エアゾール製品において、さらに、フライアッシュを含ませる場合、フライアッシュの混合割合は、超速硬セメント１００重量部に対し５０重量部以下であることが好ましく、３０重量部以下であることがさらに好ましい。フライアッシュの混合割合が５０重量部を超えると補修対象面上での本セメント系エアゾール製品の硬化速度が小さくなり好ましくない。
本発明のセメント系エアゾール製品において、超速硬セメントに加えて、フライアッシュを含ませる場合、沸点が１５〜９０℃の有機溶剤の混合割合は、超速硬セメント及びフライアッシュの合計量１００重量部に対し、１０〜１００容量部であることが好ましい。
In the cement-based aerosol product of the present invention, when fly ash is further included, the mixing ratio of fly ash is preferably 50 parts by weight or less, and 30 parts by weight or less with respect to 100 parts by weight of super-hard cement. Is more preferable. If the mixing ratio of fly ash exceeds 50 parts by weight, the curing rate of the present cement-based aerosol product on the surface to be repaired is undesirably reduced.
In the cement-based aerosol product of the present invention, when fly ash is included in addition to the ultrafast cement, the mixing ratio of the organic solvent having a boiling point of 15 to 90 ° C. is 100 parts by weight of the total amount of the ultrafast cement and fly ash. On the other hand, it is preferably 10 to 100 parts by volume.
本発明のセメント系エアゾール製品は、超速硬セメントあるいは超速硬セメント及びフライアッシュに沸点が１５〜９０℃の有機溶剤を混合したものをエアゾール容器内に収容し、缶内圧力が０．２〜０．５ＭＰａ（２５℃）となるようにＬＰＧ、ＨＦＣ−１３４ａなどの噴射用ガスを充填することにより製造される。 The cement-based aerosol product of the present invention contains super fast hard cement or super fast hard cement and fly ash mixed with an organic solvent having a boiling point of 15 to 90 ° C. in an aerosol container, and the pressure in the can is 0.2 to 0. It is manufactured by filling an injection gas such as LPG or HFC-134a so as to be 5 MPa (25 ° C.).
本発明のセメント系エアゾール製品は、コンクリートまたはセメントモルタル表面に発生した微細クラックなどの補修に用いられる。その補修方法としては、まず対象補修面を十分に水湿し、その後、本発明のセメント系エアゾール製品のスプレー吹付けを行う。対象補修面に付着したセメントをコテなどで押さえつけて、ひび割れ部など補修箇所に充填する。
補修面に付着したセメントは、放置１日後には強度発現がほぼ完了する。
The cement-based aerosol product of the present invention is used for repairing fine cracks generated on the surface of concrete or cement mortar. As the repair method, the target repair surface is first sufficiently wetted with water, and then sprayed with the cement-based aerosol product of the present invention. Press down the cement adhering to the target repair surface with a trowel, etc., and fill the repair area such as cracks.
The cement adhering to the repair surface is almost fully developed after 1 day of standing.
以下、実施例に基づいて本発明を説明する。
＜セメント系エアゾール製品の製造＞
実施例１
超速硬セメント（住友大阪セメント（株）製「ライオンシスイ１１５」）１００ｇ、ｎ−ヘ
キサン８７ｍｌを混合機（千代田技研工業（株）製；オムニミキサＯＭＮ−１５、容量１５リ
ットル）中に入れ、５分間混合した。混合した材料をスプレー缶（内容量５５０ｍｌ）に入れ、缶内圧力０．４ＭＰａ（２５℃）となるようにＬＰＧを充填した。エアゾール製品中の超速硬セメント、ｎ−ヘキサン、ＬＰＧの混合百分率は、２５．６重量％：１５．５重量％：５８．９重量％であった。
実施例２
超速硬セメント（ライオンシスイ１１５）８０ｇ、フライアッシュ（関西電力（株）製）
２０ｇおよびｎ−ヘキサン８７ｍｌを混合機（オムニミキサＯＭＮ−１５、容量１５リットル）中に入れ、５分間混合した。混合した材料をスプレー缶（内容量５５０ｍｌ）に入れ、缶内圧力０．４ＭＰａ（２５℃）となるようにＬＰＧを充填した。エアゾール製品中の超速硬セメント、フライアッシュ、ｎ−ヘキサン、ＬＰＧの混合百分率は、２０．５重量％：５．１重量％：１５．５重量％：５８．９重量％であった。
Hereinafter, the present invention will be described based on examples.
<Manufacture of cement-based aerosol products>
Example 1
100 g of ultrafast cement (Sumitomo Osaka Cement Co., Ltd. “Lion Sisui 115”) and 87 ml of n-hexane are placed in a mixer (Chiyoda Giken Kogyo Co., Ltd .; Omnimixer OMN-15, 15 liter capacity) for 5 minutes. Mixed. The mixed material was put in a spray can (with an internal volume of 550 ml) and filled with LPG so that the internal pressure of the can was 0.4 MPa (25 ° C.). The mixing percentage of super fast cement, n-hexane and LPG in the aerosol product was 25.6 wt%: 15.5 wt%: 58.9 wt%.
Example 2
80g super fast cement (Lion Sisui 115), fly ash (manufactured by Kansai Electric Power Co., Inc.)
20 g and 87 ml of n-hexane were placed in a mixer (Omnimixer OMN-15, 15 liter capacity) and mixed for 5 minutes. The mixed material was put in a spray can (with an internal volume of 550 ml) and filled with LPG so that the internal pressure of the can was 0.4 MPa (25 ° C.). The mixing percentage of ultrafast cement, fly ash, n-hexane and LPG in the aerosol product was 20.5 wt%: 5.1 wt%: 15.5 wt%: 58.9 wt%.
比較例１
超速硬セメント（ライオンシスイ１１５）１００ｇをスプレー缶（内容量５５０ｍｌ）に入れ、缶内圧力０．４ＭＰａ（２５℃）となるようにＬＰＧを充填した。エアゾール製品中の超速硬セメント、ＬＰＧの混合百分率は、３１．５重量％：６８．５重量％であった。
比較例２
超速硬セメント（ライオンシスイ１１５）９７ｇ、酢酸ビニル/バーサティック酸/アクリル共重合樹脂（ニチゴーモビニール（株）製 ＬＤＭ２０７１Ｐ）３．１ｇをスプレー缶（内容量５５０ｍｌ）に入れ、缶内圧力 ０．４ＭＰａ（２５℃）となるようにＬＰＧを充填した。エアゾール製品中の超速硬セメント、粉末樹脂、ＬＰＧの混合百分率は、３０．５重量％：１．０重量％：６８．５重量％であった。
Comparative Example 1
100 g of super-hard cement (Lion Sisui 115) was placed in a spray can (with an internal volume of 550 ml) and filled with LPG so that the internal pressure of the can was 0.4 MPa (25 ° C.). The mixing percentage of super fast cement and LPG in the aerosol product was 31.5% by weight: 68.5% by weight.
Comparative Example 2
97 g of super-hard cement (Lion Sisui 115) and 3.1 g of vinyl acetate / versaic acid / acrylic copolymer resin (LDM2071P manufactured by Nichigomo Vinyl Co., Ltd.) were put in a spray can (with a capacity of 550 ml), and the pressure in the can LPG was filled so as to be 4 MPa (25 ° C.). The mixing percentage of super fast cement, powder resin, and LPG in the aerosol product was 30.5 wt%: 1.0 wt%: 68.5 wt%.
＜発塵量の評価＞
下記の如く、高さ２ｍ×縦２．４ｍ×横４．８ｍの簡易テント内を密閉状態にして、試料エアゾール製品を吹き付け、粉塵量の測定を行った。
コンクリート平板（ＪＩＳ Ａ ５３７１プレキャスト無筋コンクリートの附属書２に規定された平板で、３００ｍｍ×３００ｍｍ×６０ｍｍのものを使用。）４枚を、高さ及び縦の中心部に固定し、水平方向に１ｍ離れた位置から吹き付け、簡易テントの中心位置に設置したデジタル粉塵計（柴田科学株式会社製Ｐ−５型）で粉塵量を計測した。このデジタル粉塵計は、浮遊している粉塵に光を照射し、散乱光の強さにより浮遊粉塵濃度を計測する装置であり、単位はＣＰＭ（１分間当たりのカウント数）で表される。また、１ＣＰＭは０．０３ｍｇ／ｍ3に相当する。
実施例１、比較例１及び２のエアゾール製品を、缶中の超速硬セメント（ライオンシスイ１１５）を内容物１ｇ／秒の噴射量で３０ｇ噴射し、噴射後３０秒経過してから粉塵濃度を測定した。
実施例１：１５ＣＰＭ（０．４５ｍｇ／ｍ3）
比較例１：８０ＣＰＭ（２．４ｍｇ／ｍ3）
比較例２：７８ＣＰＭ（２．３ｍｇ／ｍ3）
この結果、実施例１においては、粉塵濃度が比較例１、２の１／５以下に低減されていることが確認された。
<Evaluation of dust generation>
As shown below, the inside of a simple tent having a height of 2 m, a length of 2.4 m and a width of 4.8 m was sealed, and a sample aerosol product was sprayed to measure the amount of dust.
4 pieces of concrete flat plate (the flat plate specified in Annex 2 of JIS A 5371 precast unreinforced concrete, using 300mm x 300mm x 60mm) is fixed to the center of the height and length, and horizontally The amount of dust was measured with a digital dust meter (P-5 type manufactured by Shibata Kagaku Co., Ltd.) sprayed from a position 1 m away and installed at the center of the simple tent. This digital dust meter is a device that irradiates floating dust with light and measures the suspended dust concentration based on the intensity of scattered light, and the unit is expressed in CPM (count per minute). One CPM corresponds to 0.03 mg / m 3 .
The aerosol products of Example 1 and Comparative Examples 1 and 2 were injected with 30 g of super fast hard cement (Lion Sisui 115) in the can at an injection amount of 1 g / second of the contents, and the dust concentration was measured after 30 seconds had elapsed after the injection. It was measured.
Example 1: 15 CPM (0.45 mg / m 3 )
Comparative Example 1: 80 CPM (2.4 mg / m 3 )
Comparative Example 2: 78 CPM (2.3 mg / m 3 )
As a result, in Example 1, it was confirmed that the dust concentration was reduced to 1/5 or less of Comparative Examples 1 and 2.
＜ひび割れ補修性の評価＞
下記の如く、中性化深さの比較により、ひび割れ補修性の評価を行った（ＪＩＳ Ａ１１５３「コンクリートの促進中性化試験方法」及びＪＩＳ Ａ１１５２「コンクリートの中性化深さの測定方法」に準拠）。
コンクリートに膨張材を過剰添加することにより、故意にひび割れを起こした試験体（寸法３００ｍｍ×３００ｍｍ×６０ｍｍ）を作成した。実施例１，２のエアゾール製品のスプレーによる補修を行ったものと行っていないものをそれぞれ中性化試験槽に４週間静置したのち、コンクリートカッターにて切断し、切断面にフェノールフタレイン溶液を噴霧することにより、中性化深さを観察した。（図１に試験の概略図を示した。）
その結果、表１に示すように実施例１，２のエアゾール製品で補修を行ったものは、ひび割れ部分は中性化せず（変色せず）、補修が有効に行われていることが確認された。
<Evaluation of crack repairability>
As described below, the crack repairability was evaluated by comparing the neutralization depth (see JIS A1153 “Accelerated neutralization test method of concrete” and JIS A1152 “Measurement method of neutralization depth of concrete”). Compliant).
A test specimen (size: 300 mm × 300 mm × 60 mm) intentionally cracked was created by excessively adding an expansion material to the concrete. The aerosol products of Examples 1 and 2 that were repaired by spraying and those that had not been repaired were each left in a neutralization test tank for 4 weeks, then cut with a concrete cutter, and a phenolphthalein solution on the cut surface The neutralization depth was observed by spraying. (The schematic diagram of the test is shown in FIG. 1)
As a result, as shown in Table 1, it was confirmed that those repaired with the aerosol products of Examples 1 and 2 were not neutralized (no discoloration) in the cracked part, and the repair was effectively performed. It was done.
１ コンクリート平板
２ シール材（エポキシ樹脂）
３ ひび割れ部
４ 補修材
５ 表面部分の中性化
６ ひび割れ部分の中性化
1 Concrete flat plate 2 Sealing material (epoxy resin)
3 Cracked part 4 Repair material 5 Neutralization of
Claims (6)
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| JP2006011159A JP2007191584A (en) | 2006-01-19 | 2006-01-19 | Cement-based aerosol product |
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| JP2006011159A JP2007191584A (en) | 2006-01-19 | 2006-01-19 | Cement-based aerosol product |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007261853A (en) * | 2006-03-28 | 2007-10-11 | Sumitomo Osaka Cement Co Ltd | Repairing material for cross sectional deficit of concrete structure |
| JP2011220044A (en) * | 2010-04-13 | 2011-11-04 | Sumitomo Osaka Cement Co Ltd | Cement-based aerosol product |
| JP2011220045A (en) * | 2010-04-13 | 2011-11-04 | Sumitomo Osaka Cement Co Ltd | Cement-based aerosol product and cement composition for the same |
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| JPH0395289A (en) * | 1989-06-06 | 1991-04-19 | Shiseido Co Ltd | Aerosol composition |
| JPH08218061A (en) * | 1995-02-15 | 1996-08-27 | Suzuki Shiyoukan:Kk | Aerosol |
| JPH1061201A (en) * | 1996-08-22 | 1998-03-03 | Kankyo Biken:Kk | Waterproofing repair method for crack of concrete and air spray can used in the method |
| JP2004346635A (en) * | 2003-05-23 | 2004-12-09 | Noriko Takehana | Cement particle jetting apparatus and cement particle spraying method |
| JP2005162999A (en) * | 2003-12-01 | 2005-06-23 | Idm:Kk | Aerosol type cement spray-coating material and method for using the same |
| JP2005314140A (en) * | 2004-04-27 | 2005-11-10 | Taiheiyo Material Kk | Fluid-state setting material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0395289A (en) * | 1989-06-06 | 1991-04-19 | Shiseido Co Ltd | Aerosol composition |
| JPH08218061A (en) * | 1995-02-15 | 1996-08-27 | Suzuki Shiyoukan:Kk | Aerosol |
| JPH1061201A (en) * | 1996-08-22 | 1998-03-03 | Kankyo Biken:Kk | Waterproofing repair method for crack of concrete and air spray can used in the method |
| JP2004346635A (en) * | 2003-05-23 | 2004-12-09 | Noriko Takehana | Cement particle jetting apparatus and cement particle spraying method |
| JP2005162999A (en) * | 2003-12-01 | 2005-06-23 | Idm:Kk | Aerosol type cement spray-coating material and method for using the same |
| JP2005314140A (en) * | 2004-04-27 | 2005-11-10 | Taiheiyo Material Kk | Fluid-state setting material |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007261853A (en) * | 2006-03-28 | 2007-10-11 | Sumitomo Osaka Cement Co Ltd | Repairing material for cross sectional deficit of concrete structure |
| JP2011220044A (en) * | 2010-04-13 | 2011-11-04 | Sumitomo Osaka Cement Co Ltd | Cement-based aerosol product |
| JP2011220045A (en) * | 2010-04-13 | 2011-11-04 | Sumitomo Osaka Cement Co Ltd | Cement-based aerosol product and cement composition for the same |
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