JP2007178210A - Applying confirming seal of penetrable inorganic concrete modifying material and execution confirming method of penetrable inorganic concrete modifying material using execution confirming seal - Google Patents

Applying confirming seal of penetrable inorganic concrete modifying material and execution confirming method of penetrable inorganic concrete modifying material using execution confirming seal Download PDF

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JP2007178210A
JP2007178210A JP2005375577A JP2005375577A JP2007178210A JP 2007178210 A JP2007178210 A JP 2007178210A JP 2005375577 A JP2005375577 A JP 2005375577A JP 2005375577 A JP2005375577 A JP 2005375577A JP 2007178210 A JP2007178210 A JP 2007178210A
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concrete
modifier
acid
reaction layer
reaction
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JP4250745B2 (en
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Yoshihisa Suzuki
義久 鈴木
Fumihiko Ogawa
史彦 小川
Kazuhisa Matsuki
和久 松木
Toru Yahagi
徹 矢作
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DVITEC CO Ltd
Yamagata Prefecture
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DVITEC CO Ltd
Yamagata Prefecture
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Priority to PCT/JP2006/325610 priority patent/WO2007077761A1/en
Priority to KR1020087013147A priority patent/KR20080094657A/en
Priority to CNA2006800492866A priority patent/CN101356434A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
    • G01N21/80—Indicating pH value
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
    • C12M41/26—Means for regulation, monitoring, measurement or control, e.g. flow regulation of pH
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/38—Concrete; ceramics; glass; bricks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
    • G01N31/22—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators
    • G01N31/221—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators for investigating pH value

Abstract

<P>PROBLEM TO BE SOLVED: To provide a novel technique which confirming the state where a proper amount of a concrete modifying agent is applied to the surface of a concrete structure visually, easily, certainly and objectively. <P>SOLUTION: The execution confirming seal 1 of a concrete modifying material, which has a reaction layer 2 containing an acid and an indicator on its surface side, a pressure-sensitive adhesive layer on its back side and the barrier layer 4 between both layers 2 and 3, is bonded to the surface of the concrete structure in a dotted state and, when the concrete modifying agent is sprayed on the execution confirming seal 1, the acid contained in the reaction layer is subjected to the neutralization reaction with alkali contained in the concrete modifying agent and the indicator contained in the reaction layer shows color reaction. Accordingly, it is confirmed that a proper amount of the concrete modifying agent is applied. The barrier layer prevents the phenomenon where the alkali component eluted from the concrete structure 6 reaches the back side of the reaction layer to discolor the reaction layer. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、コンクリートの改質技術に関し、より具体的には、コンクリート構造物にコンクリート改質材（コンクリート保護材と呼ばれるものを含む。以下同じ。）が施工されたことを検出・確認するためのシール材及び該シール材を用いてコンクリート改質材の施工を検出する方法に関する。   The present invention relates to a concrete reforming technique, and more specifically, to detect and confirm that a concrete modifier (including what is called a concrete protective material, the same applies hereinafter) is applied to a concrete structure. The present invention relates to a sealing material and a method for detecting construction of a concrete modifier using the sealing material.

コンクリート構造物の表面に塗布または噴霧することによりコンクリート内部に深く浸透し、コンクリート成分である水酸化カルシウム、炭酸カルシウム、炭酸水素カルシウムなどと反応して無機質結晶を形成し、コンクリート内の連続細孔を緻密化させることで酸性雨・塩分・炭酸ガスなどの有害物質の侵入を防ぎ、コンクリートの劣化を抑制しコンクリートの耐久年数を延ばすタイプのコンクリート改質材が近年着目され、需要が拡大している。このようなコンクリート改質材は下記特許文献に開示されている。
特許第２９３７３０９号公報 特開２００４−１３１３１６号公報 特開２００４−３２３３３３号公報 By applying or spraying on the surface of concrete structures, it penetrates deeply into the concrete and reacts with concrete components such as calcium hydroxide, calcium carbonate, calcium bicarbonate to form inorganic crystals, and continuous pores in the concrete. In recent years, concrete modifiers that prevent the entry of harmful substances such as acid rain, salinity and carbon dioxide gas by densifying, suppress the deterioration of concrete and extend the durability of concrete have attracted attention in recent years, and demand has expanded. Yes. Such concrete modifiers are disclosed in the following patent documents.
Japanese Patent No. 2937309 JP 2004-131316 A JP 2004-323333 A

ところが、このようなコンクリート改質材はアルカリシリケートなどを主成分とする無色透明の液体であるため、これが施工されたことを視覚的に確認することが困難である。このため、発注者立会のもとで施工しているのが現状であるが、需要の拡大に伴い、品質証明と現場管理システムの構築が急務となっている。   However, since such a concrete modifier is a colorless and transparent liquid mainly composed of alkali silicate or the like, it is difficult to visually confirm that this has been applied. For this reason, construction is currently under the orderer's presence, but with the expansion of demand, the construction of a quality certification and on-site management system is urgently needed.

したがって、本発明の課題は、適量のコンクリート改質材がコンクリート構造物の表面に施工されたことを目視にて容易、確実且つ客観的に確認することができる新規な手法を提供することにある。   Accordingly, an object of the present invention is to provide a novel method capable of easily, surely and objectively confirming that an appropriate amount of a concrete modifier has been applied to the surface of a concrete structure. .

かかる課題を解決するため、請求項１に係る本発明は、コンクリート改質材がコンクリート構造物の表面に施工されたことを検出するためのシール材であって、コンクリート改質材に含まれるアルカリに定量的に反応して変色する反応層と、粘着層と、粘着層によりコンクリート構造物に貼り付けられたときにコンクリート構造物から溶出したアルカリ成分が反応層の裏面側に達して反応層を変色させてしまうことを防止するために反応層と粘着層の間に設けられる遮断層と、を有してなることを特徴とするコンクリート改質材施工確認用シールである。   In order to solve this problem, the present invention according to claim 1 is a sealing material for detecting that a concrete modifier has been applied to the surface of a concrete structure, and includes an alkali contained in the concrete modifier. A reaction layer that reacts quantitatively and discolors, an adhesive layer, and an alkali component eluted from the concrete structure when it is attached to the concrete structure by the adhesive layer reaches the back side of the reaction layer, In order to prevent discoloration, a concrete modifier construction confirmation seal comprising a barrier layer provided between a reaction layer and an adhesive layer.

請求項２に係る本発明は、請求項１記載のコンクリート改質材施工確認用シールにおいて、反応層が、基材に酸と指示薬を含浸後乾燥させることにより形成され、コンクリート構造物に噴霧された改質材に含まれるアルカリが反応層の吸水性基材に浸透して酸と中和反応したときに、指示薬が呈色反応を示すことにより、適量のコンクリート改質材が施工されたことを確認することを特徴とする。   According to a second aspect of the present invention, in the seal for confirming the concrete modifier construction according to the first aspect, the reaction layer is formed by impregnating the base material with an acid and an indicator and then drying, and sprayed onto the concrete structure. When the alkali contained in the modified material permeates the water-absorbing base material of the reaction layer and neutralizes with the acid, the indicator shows a color reaction, so that an appropriate amount of concrete modified material was applied. It is characterized by confirming.

請求項３に係る本発明は、請求項２記載のコンクリート改質材施工確認用シールにおいて、反応層に含まれる酸が室温で液体または固体の酸性物質であり、指示薬がｐＨ３〜ｐＨ１１の間で変色するｐＨ指示薬であることを特徴とする。   The present invention according to claim 3 is the concrete modifier construction confirmation seal according to claim 2, wherein the acid contained in the reaction layer is a liquid or solid acidic substance at room temperature, and the indicator is between pH 3 and pH 11. It is a pH indicator that changes color.

請求項４に係る本発明は、請求項１ないし３のいずれか記載のコンクリート改質材施工確認用シールを用い、これを裏面の粘着層を介して、コンクリート改質材を施工すべきコンクリート構造物の表面に適当間隔をおいて点在状態に貼り付けた後、コンクリート改質材施工確認用シールが貼り付けられたコンクリート構造物の表面にコンクリート改質材を噴霧し、所定時間経過後に、コンクリート改質材施工確認用シールの反応層の変色状態を目視観察することにより適量のコンクリート改質材が施工されたことを確認することを特徴とする、コンクリート改質材施工確認方法である。   According to a fourth aspect of the present invention, there is provided a concrete structure in which the concrete modifier is to be constructed through the adhesive layer on the back surface using the concrete modifier construction confirmation seal according to any one of the first to third aspects. After affixed to the surface of the object in an interspersed state with an appropriate interval, the concrete modifier is sprayed on the surface of the concrete structure on which the concrete modifier construction confirmation seal has been affixed. It is a concrete modifier construction confirmation method characterized by confirming that an appropriate amount of concrete modifier has been constructed by visually observing the color change state of the reaction layer of the concrete modifier construction confirmation seal.

請求項５に係る本発明は、請求項４記載のコンクリート改質材施工確認方法において、コンクリート改質材をコンクリート構造物の表面に噴霧した後、コンクリート改質材施工確認用シールの表面にカバーシートを貼着することにより反応層を覆うことを特徴とする。   According to a fifth aspect of the present invention, in the concrete modifier construction confirmation method according to the fourth aspect, after the concrete modifier is sprayed on the surface of the concrete structure, the concrete modifier construction confirmation seal is covered on the surface. The reaction layer is covered by sticking a sheet.

本発明のコンクリート改質材施工確認用シール及びこのシールを用いたコンクリート改質材施工確認方法によれば、コンクリート構造物の表面に適量のコンクリート改質材が噴霧・施工されたことを目視にて容易、確実且つ客観的に確認することができる。   According to the concrete modification material construction confirmation seal of the present invention and the concrete modification material construction confirmation method using this seal, it is visually confirmed that an appropriate amount of the concrete modification material has been sprayed and constructed on the surface of the concrete structure. Can be confirmed easily, reliably and objectively.

図１は、本発明の一実施形態によるコンクリート改質材施工確認用シール１をコンクリート構造物６の表面に貼り付けた状態を示す断面図である。   FIG. 1 is a cross-sectional view showing a state in which a concrete modifying material construction confirmation seal 1 according to an embodiment of the present invention is attached to the surface of a concrete structure 6.

このコンクリート改質材施工確認用シール１は、表面側に反応層２を有し、裏面側に粘着層３を有し、これらの間に遮断層４を有する積層体であり、たとえば２〜３ｃｍ程度の直径を有する円形状に形成される。   This concrete reforming material construction confirmation seal 1 is a laminate having a reaction layer 2 on the front surface side, an adhesive layer 3 on the back surface side, and a blocking layer 4 between them. It is formed in a circular shape having a certain diameter.

反応層２は、基材に酸と指示薬とを滴下して乾燥させ、これらを基材全体に均一に含浸させることにより形成される。吸水性基材としては、たとえば、ろ紙、織物、ニット、不織布、スポンジを用いることができる。本発明は、中和滴定の原理を応用して、規定量のコンクリート改質材が噴霧されたときにその中に含まれるアルカリ（強アルカリ、シリカなど）と当量の酸を反応層２に含有させておき、これらが中和反応したときのｐＨ値の急激な変化を指示薬の呈色反応で検知するものである。   The reaction layer 2 is formed by dropping an acid and an indicator on a substrate and drying them, and uniformly impregnating them all over the substrate. For example, filter paper, woven fabric, knit, non-woven fabric, or sponge can be used as the water-absorbing substrate. In the present invention, the principle of neutralization titration is applied, and the reaction layer 2 contains an alkali (strong alkali, silica, etc.) and an equivalent acid contained therein when a specified amount of concrete modifier is sprayed. In addition, a rapid change in pH value when these are neutralized is detected by the color reaction of the indicator.

酸には、液体および個体の各種酸性物質（鉱酸、有機酸）を用いることができ、たとえばアスコルビン酸、ギ酸、クエン酸、コハク酸、サリチル酸、プロピオン酸、リンゴ酸、吉草酸、酒石酸、酢酸、乳酸、酪酸などの有機酸、シュウ酸、ピロリン酸、フッ酸、ホウフッ酸、ホウ酸、ポリリン酸、ヨウ素酸、リン酸、亜リン酸、亜硫酸、塩酸、塩素酸、過ヨウ素酸、過臭素酸、臭素酸、硝酸、硫酸などの無機酸、あるいはこれらの任意混合物などを用いることができるが、塩酸は短時間で揮発してしまうので本発明の用途には好ましくなく、また、後述の実験結果から特にリン酸、クエン酸、ホウ酸が好適に用いることができるものと考えられる。   Acids can be liquid and solid acidic substances (mineral acids, organic acids), such as ascorbic acid, formic acid, citric acid, succinic acid, salicylic acid, propionic acid, malic acid, valeric acid, tartaric acid, acetic acid. , Organic acids such as lactic acid and butyric acid, oxalic acid, pyrophosphoric acid, hydrofluoric acid, borohydrofluoric acid, boric acid, polyphosphoric acid, iodic acid, phosphoric acid, phosphorous acid, sulfurous acid, hydrochloric acid, chloric acid, periodic acid, perbromine An inorganic acid such as acid, bromic acid, nitric acid or sulfuric acid, or an arbitrary mixture thereof can be used. However, hydrochloric acid volatilizes in a short time and is not preferable for the use of the present invention. From the results, it is considered that phosphoric acid, citric acid, and boric acid can be particularly preferably used.

指示薬には、ｐ−ニトロフェノール、アリザリンエローＲ（ＡＺＹ）、クレゾールレッド、クロロフェノールレッド、コンゴーレッド、チモールフタレイン、チモールブルー、テトラブロモフェノールブルー、トロペオリン０００、ニュートラルレッド、フェノールフタレイン、フェノールレッド、ブロムクレゾールグリーン、ブロムクレゾールパープル、ブロムチモールブルー（ＢＴＢ）、ブロムフェノールブルー、ブロムフェノールレッド、メチルエロー、メチルオレンジ、メチルレッドまたはこれらの混合物などを用いることができるが、後述の実験結果から特にフェノールフタレインが好適であると考えられる。   Indicators include p-nitrophenol, alizarin yellow R (AZY), cresol red, chlorophenol red, congo red, thymolphthalein, thymol blue, tetrabromophenol blue, tropeoline 000, neutral red, phenolphthalein, phenol red , Bromocresol green, bromocresol purple, bromothymol blue (BTB), bromophenol blue, bromophenol red, methyl yellow, methyl orange, methyl red, or a mixture thereof can be used. Phthalene is considered suitable.

粘着層３は、このコンクリート改質材施工確認用シール１を、コンクリート改質材を施工すべきコンクリート構造物６の表面に貼り付けるためのものであるので、コンクリート構造物６の祖面に対して十分な接着力を発揮することが要求されるほか、その表面側に積層される遮断層４に対しても十分な接着力を発揮すること、コンクリート構造物６の表面温度が夏期には５０〜６０℃にも達することがあることからこのような温度条件でも接着力を維持できる耐熱性を備えていること、湿潤が繰り返されることに耐えてある程度の湿りがあっても接着性を失わないこと、などが要求される。   The adhesive layer 3 is used to affix the concrete modifying material construction confirmation seal 1 to the surface of the concrete structure 6 on which the concrete modifying material is to be applied. In addition to being required to exhibit sufficient adhesive strength, it also exhibits sufficient adhesive strength to the barrier layer 4 laminated on the surface side thereof, and the surface temperature of the concrete structure 6 is 50 in the summer. Because it can reach -60 ° C, it must have heat resistance that can maintain the adhesive force even under such temperature conditions. Is required.

遮断層４は、反応層２と粘着層３との間に介在して、コンクリート構造物６から溶出したアルカリ成分が反応層２の裏面側に達して反応層２を変色させてしまうことを防止する役割を果たす。遮断層４の材料には、上述のように粘着層３に対して十分に密着できることのほか、反応層２に含まれる酸に侵されない耐久性があること、上述のような温度条件においても変形しにくいこと、などが要求され、これらの観点から、たとえばポリエチレン、ポリプロピレン、ポリスチレンなどのプラスチックが遮断層４の構成材料として好適である。   The blocking layer 4 is interposed between the reaction layer 2 and the adhesive layer 3 to prevent alkali components eluted from the concrete structure 6 from reaching the back side of the reaction layer 2 and discoloring the reaction layer 2. To play a role. In addition to being able to sufficiently adhere to the adhesive layer 3 as described above, the material of the blocking layer 4 has durability that is not affected by the acid contained in the reaction layer 2, and is deformed even under the above temperature conditions. From these viewpoints, plastics such as polyethylene, polypropylene, and polystyrene are suitable as the constituent material of the blocking layer 4.

なお、図示しないが、コンクリート改質材の施工には多量の水が使用されるため、この水による影響を排除するために、反応層２の表面側及び／または裏面側に吸水層を設けて本発明のコンクリート改質材施工確認用シール１を構成しても良い。   Although not shown, since a large amount of water is used for the construction of the concrete modifier, a water absorbing layer is provided on the front side and / or the back side of the reaction layer 2 in order to eliminate the influence of this water. You may comprise the concrete modification material construction confirmation seal | sticker 1 of this invention.

このようにして構成されたコンクリート改質材施工確認用シール１は、コンクリート改質材を施工すべきコンクリート構造物６の表面に、所定間隔をおいて点在状態に貼り付けて用いられる。その後、コンクリートの保護改質（高寿命化ないし高耐久化）のための作業として、コンクリート改質材施工確認用シール１が点在状態に貼り付けられたコンクリート構造物６の表面に、コンクリート改質材をスプレーなどで噴霧する。コンクリート改質材の噴霧は当該コンクリート改質材の製造販売元から提供される施工説明書に沿って行う。規定量噴霧されたコンクリート改質材には所定量のアルカリが含まれているので、コンクリート改質材施工確認用シール１の反応層２に含まれる当量の酸と中和反応し、このときの急激なｐＨ変化により、同じく反応層２に含まれる指示薬が呈色反応を示すので、規定量のコンクリート改質材が施工されたことを目視にて容易、確実且つ客観的に確認することができる。   The concrete reforming material construction confirmation seal 1 configured as described above is used by being affixed to the surface of the concrete structure 6 on which the concrete reforming material is to be constructed in a scattered state at a predetermined interval. After that, as a work to improve and improve the concrete (life extension or durability), the concrete modification 6 is adhered to the surface of the concrete structure 6 in which the seal 1 for confirming the construction of the concrete modifier is attached in a scattered state. Spray the material with a spray. Spraying of the concrete modifier is performed in accordance with the installation instructions provided by the manufacturer and seller of the concrete modifier. Since the concrete modifier sprayed in the specified amount contains a predetermined amount of alkali, it is neutralized with an equivalent amount of acid contained in the reaction layer 2 of the concrete modifier construction confirmation seal 1. Since the indicator contained in the reaction layer 2 also exhibits a color reaction due to a sudden pH change, it can be easily, surely and objectively confirmed that a specified amount of the concrete modifier has been applied. .

コンクリート改質材施工確認用シール１が点在状態に貼り付けられたコンクリート構造物６の表面にコンクリート改質材を噴霧した後、速やかに、コンクリート改質材施工確認用シール１の表面にカバーシート５を貼着することにより反応層２を覆うことが好ましい。これにより、変色したシールの保存性を向上することができる。また、コンクリート構造物６から溶出したアルカリ成分がコンクリート構造物６の表面を伝って反応層２の表面側に達して反応層２を変色させてしまうことを防止する。カバーシート５は、たとえばステンレス、プラスチックフィルム、厚紙などで形成することができる。   After spraying the concrete modifier on the surface of the concrete structure 6 on which the concrete modifier construction confirmation seals 1 are adhered in a scattered state, immediately cover the surface of the concrete modifier construction confirmation seal 1 It is preferable to cover the reaction layer 2 by sticking the sheet 5. Thereby, the preservability of the discolored seal can be improved. Moreover, it prevents that the alkaline component eluted from the concrete structure 6 reaches the surface side of the reaction layer 2 through the surface of the concrete structure 6 and changes the color of the reaction layer 2. The cover sheet 5 can be formed of, for example, stainless steel, a plastic film, or cardboard.

＜試験例＞
前述のように、本発明は、中和滴定の原理を応用して、噴霧された規定量のコンクリート改質材中に含まれるアルカリ（強アルカリ、シリカなど）と当量の酸、及び、これらが中和反応したときに生ずる急激なｐＨ変化により呈色反応を示す指示薬を反応層２に含有させておくものであるから、反応層２に含ませる酸と指示薬として好適なものを確認するための試験を行った。 <Test example>
As described above, the present invention applies the principle of neutralization titration to the acid (equivalent to alkali (strong alkali, silica, etc.)) contained in a specified amount of sprayed concrete modifier, and An indicator that exhibits a color reaction due to a rapid pH change that occurs when a neutralization reaction occurs is included in the reaction layer 2, so that it is possible to confirm a suitable acid and indicator to be included in the reaction layer 2. A test was conducted.

直径１１０ｍｍの市販の薄手の定量ろ紙（ＡＤＶＡＮＴＥＣ（登録商標、東洋濾紙）５Ａ）を１／４（約２４．２ｃｍ２）にカットした後、このカットろ紙の全体に指示薬が染み込むように適量を滴下して室内乾燥（約２０℃）し、さらにメスピペットで試薬の酸０．６ｍｌを同じくカットろ紙の全体に染み込むように滴下して室内乾燥（約２０℃）した。１ｃｍ２当たりの酸量は約０．０１２ｍｅｑとなる。このカットろ紙の端部を２ｍｍ程度カットして、２ｃｍ×２ｃｍの試験体を作成した。指示薬にはフェノールフタレイン、メチルオレンジ、ＢＴＢ、アリザリンイエローの４種の溶液を用い、酸には塩酸、硫酸、リン酸、ホウ酸、酢酸、クエン酸の６種を用いて、これらを組み合わせることにより計２４種類の試験体を作成した。これらの試験体が、本発明のコンクリート改質材施工確認用シール１における反応層２に対応する。 After cutting a commercially available thin quantitative filter paper (ADVANTEC (registered trademark, Toyo Filter Paper) 5A) with a diameter of 110 mm into 1/4 (about 24.2 cm 2 ), an appropriate amount is dropped so that the indicator soaks into the entire cut filter paper. Then, it was dried indoors (about 20 ° C.), and further 0.6 ml of the reagent acid was dropped with a measuring pipette so as to soak into the entire cut filter paper and dried indoors (about 20 ° C.). The acid amount per cm 2 is about 0.012 meq. The edge part of this cut filter paper was cut about 2 mm, and the test body of 2 cm x 2 cm was created. Use 4 types of solutions of phenolphthalein, methyl orange, BTB, and alizarin yellow as indicators, and use 6 types of acids as hydrochloric acid, sulfuric acid, phosphoric acid, boric acid, acetic acid, citric acid, and combine them. Thus, a total of 24 types of test bodies were prepared. These test bodies correspond to the reaction layer 2 in the seal 1 for confirming the construction of the concrete modifier of the present invention.

コンクリート改質材としてはケイ酸リチウム系およびケイ酸ナトリウム系の市販品を用い、市販品の原液を３倍、１０倍及び１００倍の水で希釈した３３％希釈液、１０％希釈液及び１％希釈液を調製した。これらのｐＨ値を測定したところそれぞれ１１．４１、１１．３１及び１０．６８であった。なお、該市販品の使用説明書によれば３３％希釈液として１回当たりの噴霧量０．０５Ｌ／ｍ２（＝０．００５ｍｌ／ｃｍ２）で噴霧すべきものとされており、噴霧１回当たりのアルカリ量は約０．０１２ｍｅｑ／ｃｍ２である。 As the concrete modifier, commercial products of lithium silicate and sodium silicate were used, and the stock solution of the commercial product was diluted with water 3 times, 10 times and 100 times with 33% diluted solution, 10% diluted solution and 1 % Dilutions were prepared. When these pH values were measured, they were 11.41, 11.31 and 10.68, respectively. In addition, according to the instruction manual of the commercial product, it should be sprayed at a spray amount of 0.05 L / m 2 (= 0.005 ml / cm 2 ) per time as a 33% diluted solution. The amount of alkali per unit is about 0.012 meq / cm 2 .

各試験体をペーパータオルに載せ、その上方５ｃｍからコンクリート改質材の各希釈液サンプルを下向きにスプレーで噴霧した。希釈液サンプルの噴霧量は約０．１５ｇ≒０．１５ｍｌであり、試験体を含む直径４ｃｍの円形領域に噴霧されたことから、１ｃｍ２当たりの噴霧量は約０．０１２ｍｌであった。したがって、１回の噴霧により試験体ｃｍ２に存在するとされる酸の量は０．００４ｍｅｑであるため、濃度３３．３％を基準とすると、噴霧回数を３回として実験を行った。 Each test specimen was placed on a paper towel, and each diluted solution sample of the concrete modifier was sprayed downward from 5 cm above. The spray amount of the diluted sample was about 0.15 g≈0.15 ml, and the spray amount per cm 2 was about 0.012 ml because it was sprayed on a circular area of 4 cm in diameter including the test specimen. Therefore, since the amount of acid that is supposed to be present in the test body cm 2 by one spray is 0.004 meq, the experiment was performed with the number of sprays being 3 times based on the concentration of 33.3%.

また、３３％希釈液においては、１回の噴霧によるアルカリの量は、試験体のカットろ紙１ｃｍ２当たり０．００４ｍｅｑであった。試験体にあらかじめ染み込ませてある酸の量は、試験体１ｃｍ２当たり約０．０１２ｍｅｑであることから、３３％希釈液を基準とすると、３回の希釈液の噴霧により試験体の酸が中和されることになる。以上のことから噴霧回数を３回として実験を行った。 In the 33% diluted solution, the amount of alkali by one spraying was 0.004 meq per 1 cm 2 of cut filter paper of the test specimen. Since the amount of the acid soaked in the test body in advance is about 0.012 meq per 1 cm 2 of the test body, when the 33% dilution liquid is used as a standard, the acid of the test body is moderated by spraying the dilution liquid three times. Will be summed. Based on the above, the experiment was performed with the number of sprays set to three.

図２〜図６に示す試験結果に見られるように、３３．３％希釈液サンプルを噴霧した場合には明確な呈色反応が確認され、１０％希釈液サンプル及び１％希釈液サンプルと比較しても呈色反応に大きな違いがあることが確認された。   As can be seen from the test results shown in FIGS. 2 to 6, a clear color reaction was confirmed when the 33.3% dilution sample was sprayed, and compared with the 10% dilution sample and the 1% dilution sample. Even so, it was confirmed that there was a big difference in the color reaction.

しかしながら、酸や指示薬によってはろ紙が劣化し崩れやすくなっている試験体や、指示薬が劣化して変色している試験体も見受けられたため、乾燥後の酸の残留状況、ろ紙の劣化状況、酸による指示薬の劣化状況、指示薬の呈色反応の明確さの各項目について、酸及び指示薬ごとに評価した。この結果が図７に示されており、特に好適と考えられる酸はリン酸、クエン酸、塩酸、ホウ酸であるが、塩酸は蒸発しやすい特性を有するため、本発明の用途には不適であると考えられる。また、特に好適であると考えられる指示薬はＡＺＹ、フェノールフタレインであるが、メチルオレンジも斑が少なく比較的安定した呈色反応を示したことから、組み合わせる酸の種類によっては好適に使用可能となり得るものと考えられる。   However, there were some test specimens in which the filter paper deteriorated easily due to acid and indicator, and test specimens in which the indicator deteriorated and discolored. Therefore, the residual state of acid after drying, the deterioration condition of filter paper, Each of the items of indicator deterioration state and clarity of indicator color reaction was evaluated for each acid and indicator. This result is shown in FIG. 7. Acids that are considered particularly suitable are phosphoric acid, citric acid, hydrochloric acid, and boric acid. However, hydrochloric acid has a property of easily evaporating, and is not suitable for the use of the present invention. It is believed that there is. Indicators that are considered to be particularly suitable are AZY and phenolphthalein, but methyl orange also has a relatively stable color reaction with few spots, so it can be used suitably depending on the type of acid to be combined. It is thought to get.

本発明の一実施形態によるコンクリート改質材施工確認用シールをコンクリート構造物の表面に貼り付けた状態を示す断面図である。It is sectional drawing which shows the state which affixed the concrete modification material construction confirmation seal | sticker by one Embodiment of this invention on the surface of a concrete structure. 指示薬としてフェノールフタレイン溶液を用いた試験体の呈色反応状況を示す図表である。It is a graph which shows the color reaction condition of the test body which used the phenolphthalein solution as an indicator. 指示薬としてメチルオレンジ溶液を用いた試験体の呈色反応状況を示す図表である。It is a chart which shows the color reaction condition of the test body which used the methyl orange solution as an indicator. 指示薬としてＢＴＢ溶液を用いた試験体の呈色反応状況を示す図表である。It is a chart which shows the color reaction condition of the test body which used the BTB solution as an indicator. 指示薬としてＡＺＹ溶液を用いた試験体の呈色反応状況を示す図表である。It is a chart which shows the color reaction condition of the test body which used the AZY solution as an indicator. 反応層に好適に用いられる酸と指示薬を予測するための評価表である。It is an evaluation table for predicting the acid and indicator suitably used for a reaction layer.

符号の説明Explanation of symbols

１ コンクリート改質材施工確認用シール
２ 反応層
３ 粘着層
４ 遮断層
５ カバーシート
６ コンクリート構造物 1 Concrete modification material construction confirmation seal 2 Reaction layer 3 Adhesive layer 4 Barrier layer 5 Cover sheet 6 Concrete structure

Claims (5)

コンクリート改質材がコンクリート構造物の表面に施工されたことを検出するためのシール材であって、コンクリート改質材に含まれるアルカリに定量的に反応して変色する反応層と、粘着層と、粘着層によりコンクリート構造物に貼り付けられたときにコンクリート構造物から溶出したアルカリ成分が反応層の裏面側に達して反応層を変色させてしまうことを防止するために反応層と粘着層の間に設けられる遮断層と、を有してなることを特徴とするコンクリート改質材施工確認用シール。 A sealing material for detecting that a concrete modifier has been applied to the surface of a concrete structure, a reaction layer that quantitatively reacts with an alkali contained in the concrete modifier and discolors, an adhesive layer, In order to prevent alkali components eluted from the concrete structure from reaching the back side of the reaction layer and discoloring the reaction layer when adhered to the concrete structure by the adhesive layer, A seal for confirming the construction of a concrete modifier, characterized by comprising a barrier layer provided therebetween. 反応層が、基材に酸と指示薬を含浸後乾燥させることにより形成され、コンクリート構造物に噴霧された改質材に含まれるアルカリが反応層の吸水性基材に浸透して酸と中和反応したときに、指示薬が呈色反応を示すことにより、適量のコンクリート改質材が施工されたことを確認することを特徴とする、請求項１記載のコンクリート改質材施工確認用シール。 The reaction layer is formed by impregnating the base material with acid and indicator and then drying, and the alkali contained in the modifier sprayed on the concrete structure penetrates into the water-absorbing base material of the reaction layer and neutralizes the acid. The concrete modifier construction confirmation seal according to claim 1, wherein when the reaction is performed, the indicator shows a color reaction to confirm that an appropriate amount of the concrete modifier has been applied. 反応層に含まれる酸が室温で液体または固体の酸性物質であり、指示薬がｐＨ３〜ｐＨ１１の間で変色するｐＨ指示薬であることを特徴とする、請求項２記載のコンクリート改質材施工確認用シール。 3. The concrete modifier construction confirmation according to claim 2, wherein the acid contained in the reaction layer is a liquid or solid acidic substance at room temperature, and the indicator is a pH indicator that changes color between pH 3 and pH 11. sticker. 請求項１ないし３のいずれか記載のコンクリート改質材施工確認用シールを用い、これを裏面の粘着層を介して、コンクリート改質材を施工すべきコンクリート構造物の表面に適当間隔をおいて点在状態に貼り付けた後、コンクリート改質材施工確認用シールが貼り付けられたコンクリート構造物の表面にコンクリート改質材を噴霧し、所定時間経過後に、コンクリート改質材施工確認用シールの反応層の変色状態を目視観察することにより適量のコンクリート改質材が施工されたことを確認することを特徴とする、コンクリート改質材施工確認方法。 Use the concrete modifier construction confirmation seal according to any one of claims 1 to 3, with an appropriate interval on the surface of the concrete structure where the concrete modifier is to be constructed, through the adhesive layer on the back surface. After pasting in a scattered state, spray the concrete modifier on the surface of the concrete structure where the concrete modifier construction confirmation seal has been affixed. A concrete modifier construction confirmation method characterized by confirming that an appropriate amount of concrete modifier has been constructed by visually observing the discolored state of the reaction layer. コンクリート改質材をコンクリート構造物の表面に噴霧した後、コンクリート改質材施工確認用シールの表面にカバーシートを貼着することにより反応層を覆うことを特徴とする、請求項４記載のコンクリート改質材施工確認方法。 5. The concrete according to claim 4, wherein the reaction layer is covered by sticking a cover sheet on the surface of the concrete modifier construction confirmation seal after spraying the concrete modifier on the surface of the concrete structure. Modification material construction confirmation method.
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JP2008304347A (en) * 2007-06-08 2008-12-18 Taku Setsu:Kk Method for inspecting work progress of concrete modifying waterproof construction
JP2012173283A (en) * 2011-02-23 2012-09-10 Yoshihisa Suzuki Tester for construction quality management of concrete surface protection material, modification material and water repellent material, and method of construction quality management of concrete surface protection material, modification material and water repellent material using tester
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WO2008152773A1 (en) * 2007-06-13 2008-12-18 Devitec Co.Ltd. Quality control method for execution of concrete reforming material application
JP2008308357A (en) * 2007-06-13 2008-12-25 Dvitec Co Ltd Quality control method for application of concrete modification material
JP2012173283A (en) * 2011-02-23 2012-09-10 Yoshihisa Suzuki Tester for construction quality management of concrete surface protection material, modification material and water repellent material, and method of construction quality management of concrete surface protection material, modification material and water repellent material using tester
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JP7107726B2 (en) 2018-04-13 2022-07-27 清水建設株式会社 Method for confirming filling property of covering material and device for confirming filling property

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