JP2002040013A - Neutralization measuring method of concrete - Google Patents
Neutralization measuring method of concreteInfo
- Publication number
- JP2002040013A JP2002040013A JP2000226977A JP2000226977A JP2002040013A JP 2002040013 A JP2002040013 A JP 2002040013A JP 2000226977 A JP2000226977 A JP 2000226977A JP 2000226977 A JP2000226977 A JP 2000226977A JP 2002040013 A JP2002040013 A JP 2002040013A
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- Japan
- Prior art keywords
- concrete
- container
- depth
- drill
- neutralization
- 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.)
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- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、コンクリート構造
物のコンクリートの劣化度診断に用いられるコンクリー
トの中性化測定方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring carbonation of concrete for use in diagnosing the degree of deterioration of concrete in a concrete structure.
【0002】[0002]
【従来の技術】コンクリートは空気中の炭酸ガス等の作
用によりアルカリ性を失って表面から次第に中性化して
いく。コンクリートが中性化すると、鉄筋類に対する防
錆効果を失い、鉄筋類の腐食が進行して必要な強度を失
うと同時に、膨張してコンクリートを破壊する。そのた
め、コンクリート構造物では、コンクリート表面からの
コンクリート中性化深さを測定することは劣化度を把握
する上で極めて重要であり、測定したコンクリート中性
化深さにより、中性化が鉄筋に到達しているか否か、鉄
筋にどの程度接近した部分まで中性化が進行しているか
を判定することができる。2. Description of the Related Art Concrete loses alkalinity by the action of carbon dioxide gas in the air and gradually neutralizes from the surface. When the concrete is neutralized, it loses the rust-preventing effect on the reinforcing steel, and the corrosion of the reinforcing steel progresses to lose the necessary strength, and at the same time, the concrete expands and destroys the concrete. Therefore, in concrete structures, measuring the depth of concrete neutralization from the concrete surface is extremely important in understanding the degree of deterioration. It is possible to determine whether or not the carbonization has reached, and to what extent the neutralization has progressed to a portion close to the rebar.
【0003】このようなコンクリートの中性化深さを測
定する場合、一般的には、コンクリートから直径3〜1
0cm程度のコアを抜き取り、このコアにフェノールフ
タレイン溶液等の試薬を吹き付け、コンクリート表面か
らの中性化深さを測定している。しかし、この方法で
は、比較的大径のコアを抜き取るため、建物を大きく傷
付けることになる。また、コアカッターに水を使うの
で、現場が汚れるなどの問題もある。[0003] When measuring the neutralization depth of such concrete, generally, the diameter of the concrete is 3 to 1 mm.
A core of about 0 cm is extracted, and a reagent such as a phenolphthalein solution is sprayed on the core to measure the neutralization depth from the concrete surface. However, in this method, a relatively large-diameter core is extracted, so that the building is greatly damaged. In addition, since water is used for the core cutter, there is a problem that the site becomes dirty.
【0004】前述のような問題を解決するために、ドリ
ルによってコンクリートを穿孔し、このとき排出される
コンクリート粉のアルカリ性を測定して中性化深さを推
定する方法が提案されている。この方法は、ドリルを使
用することでコンクリート構造物に対する影響が最小限
となるようにしたものであり、例えば、次に示すようう
な方法がある。 (1) 図4に示すように、コンクリート1をドリル2aで
穿孔し、このとき出るコンクリート粉3を試薬(1%フ
ェノールフタレイン溶液,水15%を含む)を染み込ま
せたろ紙(吸取紙)50で受け、このろ紙が変色したと
きのドリル穴の深さをノギス等で測定する方法である。 (2) 図5に示すように、コンクリート1の穿孔箇所の下
側近傍に試薬を滴下または含侵させたテープ状等の粘着
部材60を配置し、ドリル2aの穿孔移動に連動して粘
着部材60を一方向に移動させ、穿孔により発生したコ
ンクリート粉3を粘着部材60上に連続的に粘着させ、
試薬が変色したときの粘着部材60上のコンクリート粉
3の長さからドリル穴の深さを知る方法である。[0004] In order to solve the above-mentioned problems, a method has been proposed in which concrete is pierced by a drill and the alkalinity of concrete powder discharged at this time is measured to estimate the depth of neutralization. In this method, the influence on the concrete structure is minimized by using a drill. For example, there is a method as described below. (1) As shown in FIG. 4, concrete 1 is pierced with a drill 2a, and concrete powder 3 produced at this time is filtered with a reagent (containing 1% phenolphthalein solution and 15% water) (filter paper). This is a method of measuring the depth of a drill hole when the filter paper is discolored with a vernier caliper or the like. (2) As shown in FIG. 5, an adhesive member 60 such as a tape in which a reagent is dropped or impregnated is disposed near the lower side of the perforated portion of the concrete 1, and the adhesive member is interlocked with the drilling movement of the drill 2a. 60 is moved in one direction, and the concrete powder 3 generated by the perforation is continuously adhered onto the adhesive member 60,
This is a method of knowing the depth of the drill hole from the length of the concrete powder 3 on the adhesive member 60 when the color of the reagent has changed.
【0005】[0005]
【発明が解決しようとする課題】しかし、前述の(1) の
方法では、穿孔作業とろ紙を水平に支持する作業が必要
であり、測定に2人の作業員が必要となる。さらに、排
出されるコンクリート粉を常にコンクリート粉のない新
しい面で受けられるように、ろ紙を移動させなければな
らず、面倒な作業となり、正確な測定も難しい。また、
ろ紙を持った作業員が穿孔機に触れる危険もある。However, in the above-mentioned method (1), a perforating operation and an operation for horizontally supporting the filter paper are required, and two workers are required for measurement. In addition, the filter paper must be moved so that the discharged concrete powder can always be received on a new surface free of concrete powder, which is a cumbersome operation and accurate measurement is difficult. Also,
There is also a risk that the operator holding the filter paper will touch the punch.
【0006】前述の(2) の方法では、装置が複雑で高価
となり、また装置が重く重作業となる。さらに、ドリル
穴深さに比例する粘着部材上のコンクリート粉の長さか
ら中性化深さを求めるため、正確な測定が難しい。ま
た、(1),(2) の方法とも、ろ紙等が乾燥してしまって測
定誤差が発生することもある。In the above method (2), the apparatus is complicated and expensive, and the apparatus is heavy and heavy. Further, since the neutralization depth is determined from the length of the concrete powder on the adhesive member, which is proportional to the drill hole depth, accurate measurement is difficult. In both of the methods (1) and (2), the filter paper or the like may be dried and a measurement error may occur.
【0007】本発明は、ドリルによってコンクリートを
穿孔し、このとき排出されるコンクリート粉のアルカリ
性を測定して中性化深さを推定する方法において、一人
で簡単に測定作業を行うことができると共に、簡易で軽
量の装置でコンクリート中性化深さを正確に測定するこ
とができるコンクリートの中性化測定方法を提供するこ
とにある。The present invention provides a method for estimating the neutralization depth by measuring the alkalinity of concrete powder discharged at the time of drilling concrete with a drill, and it is possible to perform the measurement work easily by one person. It is another object of the present invention to provide a concrete neutralization measuring method capable of accurately measuring the concrete neutralization depth with a simple and lightweight device.
【0008】[0008]
【課題を解決するための手段】本発明に係るコンクリー
トの中性化測定方法は、コンクリートを例えばドリルに
より穿孔する際に排出されるコンクリート粉のアルカリ
性を検知してコンクリートの中性化深さを測定する方法
であり、試薬(フェノールフタレイン溶液など)の入っ
た容器を穿孔箇所の下方のコンクリート表面等に固定
し、容器内の液体試薬中に落下したコンクリート粉が変
色した時の穿孔深さまたは変色した時の容器内のコンク
リート粉の量からコンクリートの中性化深さを求めるこ
とを特徴とする。SUMMARY OF THE INVENTION According to the present invention, there is provided a method for measuring the neutralization of concrete by detecting the alkalinity of concrete powder discharged when drilling concrete, for example, by drilling. This is a method of measurement, in which a container containing a reagent (such as a phenolphthalein solution) is fixed to the concrete surface below the perforation point, and the depth of perforation when the concrete powder that has fallen into the liquid reagent in the container changes color. Alternatively, the neutralization depth of the concrete is determined from the amount of concrete powder in the container at the time of discoloration.
【0009】試薬を入れる容器は、透明の容器とし、コ
ンクリート粉の変色を容易に確認できるようにするのが
好ましい。また、容器の上部に穿孔箇所を挟むように一
対の仕切板を突設し、コンクリート粉が確実に容器内に
落下できるようにするのが好ましい。この仕切板は粉の
飛散防止だけでなく風除けにもなる。また、仕切板の高
さを変えたり目盛りを打って穿孔位置を決める目安にも
できる。It is preferable that the container for storing the reagent is a transparent container so that the discoloration of the concrete powder can be easily confirmed. Further, it is preferable that a pair of partition plates project from the upper portion of the container so as to sandwich the perforated portion, so that the concrete powder can surely fall into the container. This partition plate not only prevents scattering of the powder but also protects the wind. In addition, the height of the partition plate can be changed or a scale can be punched to determine the perforation position.
【0010】測定点(穿孔箇所)は1点でもよいが、通
常複数点を穿孔するので複数点とし、各点の平均値、あ
るいは適当に選択した数点、例えば最大値と最小値を除
いた平均値を求めるのが好ましい。通常は5点程度であ
る。この場合、複数の穿孔箇所の間隔に合わせて容器を
横に並べて一体化し、また、各容器の上部には、各穿孔
箇所を挟むように仕切板を設けるのが好ましい。The number of measurement points (piercing points) may be one. However, since a plurality of points are usually pierced, a plurality of points are used, and the average value of each point, or several points appropriately selected, for example, the maximum value and the minimum value are excluded. Preferably, an average value is determined. Usually, about 5 points. In this case, it is preferable that the containers are arranged side by side in accordance with the interval between the plurality of perforated portions and integrated, and that a partition plate is provided above each container so as to sandwich each perforated portion.
【0011】また、容器の上部における一対の仕切板間
に背板を設け、この背板の中央にドリルの位置決め穴を
穿設し、この位置決め穴により、ドリルを位置決めし、
かつコンクリート粉が容器の中央に落下するようにする
こともできる。また、容器にはコンクリート粉を捕らえ
るフィルタを試薬中に設け、変色したコンクリート粉を
取り除くことで、試薬の交換・容器の洗浄を不要とする
こともできる。A back plate is provided between the pair of partition plates at the upper part of the container, a drill positioning hole is formed in the center of the back plate, and the drill is positioned by the positioning hole.
In addition, the concrete powder can be made to fall to the center of the container. In addition, a filter for catching concrete powder is provided in the reagent in the container, and the discolored concrete powder is removed, thereby making it unnecessary to replace the reagent and wash the container.
【0012】コンクリートの中性化深さは、容器内のコ
ンクリート粉が変色した瞬間にドリルを抜き、ドリル穴
の深さをノギス等で測定し、必要に応じて補正して、求
める。あるいは、試薬の入った容器を漏斗状の容器と
し、この容器下部の管部分にコンクリート粉を堆積さ
せ、ドリル穴の深さに対応した目盛りを管部分に刻設
し、容器内のコンクリート粉が変色したときのコンクリ
ート粉の目盛りを読むことでコンクリートの中性化深さ
を求める。The neutralization depth of concrete is determined by extracting a drill at the moment when the concrete powder in the container is discolored, measuring the depth of the drill hole with a vernier caliper or the like, and correcting as necessary. Alternatively, the container containing the reagent is a funnel-shaped container, concrete powder is deposited on the tube portion below the container, and a scale corresponding to the depth of the drill hole is engraved on the tube portion. Determine the neutralization depth of concrete by reading the scale of concrete powder when discolored.
【0013】漏斗状の容器の場合、管部分の下端に栓を
設けることにより、容器内を簡単に洗うことができる。
また、管部分を上部本体に着脱自在に取付けることによ
り、さらに洗いやすく、また部品の交換も可能となる。In the case of a funnel-shaped container, by providing a stopper at the lower end of the tube portion, the inside of the container can be easily washed.
In addition, by detachably attaching the tube portion to the upper body, it is easier to wash and the parts can be replaced.
【0014】以上のような構成において、コンクリート
表面の測定点の下方に容器を粘着テープなどで固定し、
ドリルで測定点の穿孔を行う。ドリルによる穿孔に伴っ
て容器内にコンクリート粉が落下し、コンクリート粉が
中性化している場合、試薬によりコンクリート粉は変色
せず、コンクリート粉がアルカリ性を示している場合に
は、コンクリート粉が変色する。変色した瞬間にドリル
を抜き、ドリル穴の深さをノギス等で測定し、あるいは
容器内のコンクリート粉の量を測定することで、コンク
リート中性化深さが求められる。In the above configuration, the container is fixed below the measuring point on the concrete surface with an adhesive tape or the like,
Drill the measurement point with a drill. When concrete powder falls into the container due to drilling and the concrete powder is neutralized, the reagent powder does not change color when the concrete powder is neutralized, and when the concrete powder shows alkalinity, the concrete powder changes color. I do. At the moment when the discoloration occurs, the depth of the drilled hole is measured, and the depth of the drilled hole is measured with a vernier caliper or the like, or the amount of concrete powder in the container is measured.
【0015】ドリルで穿孔を行うことで、コアの抜き取
りと比べて、非破壊に近く、簡単に安価に中性化深さの
測定を行うことができる。また、試薬の入った容器をコ
ンクリート表面に固定するため、従来のろ紙を用いたド
リル法に比べ、1人で簡単に安全に測定作業を行うこと
ができる。さらに、従来の粘着部材移動式のドリル法に
比べ、簡易で軽量であり、変色したときのドリル穴の深
さあるいはコンクリート粉の量を計測するため、正確な
測定が可能となる。また、試薬に液体試薬を用いること
ができ、乾燥による測定誤差を防止することができる。By drilling with a drill, the depth of neutralization can be easily and inexpensively measured close to non-destruction as compared with the extraction of a core. Further, since the container containing the reagent is fixed to the concrete surface, the measurement operation can be performed easily and safely by one person as compared with the conventional drill method using filter paper. Furthermore, it is simpler and lighter than the conventional adhesive member moving type drill method, and measures the depth of the drill hole or the amount of concrete powder when discolored, so that accurate measurement is possible. In addition, a liquid reagent can be used as a reagent, and measurement errors due to drying can be prevented.
【0016】[0016]
【発明の実施の形態】以下、本発明を図示する一実施形
態に基づいて説明する。この実施形態はコンクリート基
礎の東西南北の4面を5箇所ずつ測定する例である。図
1はコンクリートの中性化測定方法を実施するため測定
装置の1例を示したものである。図2は、図1の測定装
置の変形例を示したものである。図3は、排出されたコ
ンクリート粉の量でコンクリート中性化深さを測定する
測定装置の例を示したものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on one embodiment shown in the drawings. This embodiment is an example of measuring the four sides of the east, west, north and south of the concrete foundation at five locations each. FIG. 1 shows an example of a measuring device for implementing the concrete neutralization measuring method. FIG. 2 shows a modification of the measuring device of FIG. FIG. 3 shows an example of a measuring device for measuring the concrete neutralization depth based on the amount of discharged concrete powder.
【0017】図1において、測定装置10は、上部が開
口した有底の直方体形状の容器11と、側面視長方形状
の仕切板12と、容器11内に充填されるフェノールフ
タレイン1%エタノール溶液などの試薬13からなり、
5つの容器11と6枚の仕切板12を交互に横に並べ接
着剤などで一体化して構成されている。In FIG. 1, a measuring device 10 includes a rectangular parallelepiped container 11 having an open top, a rectangular partition plate 12 in a side view, and a 1% ethanol solution of phenolphthalein filled in the container 11. Consisting of reagents 13 such as
Five containers 11 and six partition plates 12 are alternately arranged side by side and integrated with an adhesive or the like.
【0018】5つの容器11は、5つの測定点(穿孔箇
所)14の間隔に合わせて横に配列され、各仕切板12
は、下部が容器11の側面に添接し、上部が容器11の
上面から所定の長さだけ突出するようにされている。従
って、各容器11において、左右一対の仕切板12,1
2の上部が穿孔箇所14を囲み、ドリル2aの削孔によ
り排出されたコンクリート粉3が全て容器11内に落下
し、隣の容器11内に入ることがない。The five containers 11 are arranged side by side at intervals of five measurement points (perforation points) 14 and each partition plate 12
The lower part is in contact with the side surface of the container 11 and the upper part projects from the upper surface of the container 11 by a predetermined length. Therefore, in each container 11, a pair of left and right partition plates 12, 1
The upper part of 2 surrounds the perforated portion 14, and all the concrete powder 3 discharged by the drilling of the drill 2a falls into the container 11 and does not enter the adjacent container 11.
【0019】これら容器11および仕切板12には、透
明板を使用することにより、各容器11におけるコンク
リート粉3の変色を容易に知ることができる。なお、容
器や仕切板の形状等は図示例に限らず、その他の形状で
もよいことは言うまでもない。By using a transparent plate for the container 11 and the partition plate 12, the discoloration of the concrete powder 3 in each container 11 can be easily known. It is needless to say that the shape and the like of the container and the partition plate are not limited to the illustrated example, but may be other shapes.
【0020】以上のような構成の測定装置10を使用し
て、次のような手順でコンクリート中性化深さの測定を
行う(図1参照)。 (1) コンクリート1の表面に測定装置10を水平にセッ
トし、両面テープや粘着テープなどで固定する。 (2) 各容器11内に試薬(フェノールフタレイン1%エ
タノール溶液)13を注ぐ。フェノールフタレイン溶液
は無色である。 (3) 各仕切板12の上部間の中間位置を本例ではハンマ
ードリル(ドリル径5mm程度)で穿孔し、コンクリー
ト粉3を容器11内に落下させる。コンクリート粉3が
中性化部分からの場合、試薬13によりコンクリート粉
3は変色せず、コンクリート粉3がアルカリ部分からの
場合、コンクリート粉3が赤紫色に変色する。 (4) 容器11内に落下したコンクリート粉3が赤紫に変
色した時点でドリルの穿孔を停止し、次の測定点に移
る。 (5) コンクリートの各面において5箇所の穿孔が終了す
ると、各ドリル穴の深さをノギスで測定し、記録する。 (6) 各面毎に5点の測定値から最大値と最小値を除いた
3点の平均値を求め、この平均値をその面の測定値X
〔mm〕とする。 (7) コンクリートの中性化深さY〔mm〕は、次の
(1)式によって算定される。Using the measuring device 10 having the above-described configuration, the concrete neutralization depth is measured in the following procedure (see FIG. 1). (1) The measuring device 10 is set horizontally on the surface of the concrete 1 and fixed with a double-sided tape or an adhesive tape. (2) Pour a reagent (phenolphthalein 1% ethanol solution) 13 into each container 11. The phenolphthalein solution is colorless. (3) In this example, a middle position between the upper portions of the partition plates 12 is pierced with a hammer drill (a drill diameter of about 5 mm), and the concrete powder 3 is dropped into the container 11. When the concrete powder 3 is from the neutralized portion, the concrete powder 3 is not discolored by the reagent 13, and when the concrete powder 3 is from the alkaline portion, the concrete powder 3 is discolored to magenta. (4) When the concrete powder 3 that has fallen into the container 11 turns reddish purple, the drilling is stopped and the process moves to the next measurement point. (5) When five holes have been drilled on each side of the concrete, measure the depth of each drill hole with a vernier caliper and record it. (6) For each surface, the average value of three points obtained by removing the maximum value and the minimum value from the measured values of five points is obtained, and this average value is measured value X of the surface.
[Mm]. (7) The neutralization depth Y [mm] of concrete is calculated by the following equation (1).
【0021】Y=A・X+B …(1)式 ここで、A,Bは実験等により求める。Y = A · X + B (1) Here, A and B are obtained by experiments and the like.
【0022】以上により、コンクリートの中性化深さY
が得られる。図2(a) は、図1の容器11において、ド
リルの位置決め穴を設けたものであり、容器11の固定
側の背板11aを仕切板12に合わせて上方に延長する
などし、この部分にドリルの位置決め穴15を穿設す
る。このような位置決め穴を設ければ、ドリル2aの先
端を容易に位置決めすることができ、また、コンクリー
ト粉3を容器11の中央に落下させることができ、より
正確な測定が可能となる。As described above, the neutralization depth Y of concrete
Is obtained. FIG. 2 (a) shows the container 11 of FIG. 1 in which a positioning hole for a drill is provided, and the fixed side back plate 11a of the container 11 is extended upward in accordance with the partition plate 12, and the like. A drill positioning hole 15 is formed in the hole. If such a positioning hole is provided, the tip of the drill 2a can be easily positioned, and the concrete powder 3 can be dropped to the center of the container 11, so that more accurate measurement can be performed.
【0023】図2(b) は、図1の容器11において、容
器内に落下したコンクリート粉3を容易に取り除けるよ
うにしたものであり、上部が開口した袋状のフィルタ1
6を上方から容器11内に装着する。測定によりコンク
リート粉3が変色するため、フィルタ16を取り外して
コンクリート粉3を取り除くことで、試薬13の交換・
容器11の洗浄を行う必要がなくなる。FIG. 2 (b) shows a filter 11 in which the concrete powder 3 which has fallen into the container can be easily removed from the container 11 of FIG.
6 is mounted in the container 11 from above. Since the concrete powder 3 is discolored by the measurement, the filter 16 is removed and the concrete powder 3 is removed.
There is no need to wash the container 11.
【0024】図3は、ドリル穴の深さの測定を不要とし
たものであり、図3(a) に示すように、漏斗状の容器2
0を使用し、上部の逆錐体部分20aでコンクリート粉
3を受けて下方へ流下させ、下部の有底の管部分20b
にコンクリート粉3を堆積させる。この管部分20bに
目盛り21を設け、この目盛り21をドリル穴深さに比
例するコンクリート粉3の排出量に対応させて刻設して
おけば、変色したコンクリート粉3の目盛りを読むこと
でドリル穴深さを簡単に知ることができる。FIG. 3 does not require the measurement of the depth of the drill hole, and as shown in FIG.
0, the concrete powder 3 is received by the inverted pyramid portion 20a at the upper portion and is caused to flow downward, and the tube portion 20b having a lower bottom is provided.
Concrete powder 3 is deposited on the concrete. If a scale 21 is provided on the pipe portion 20b and the scale 21 is engraved in correspondence with the discharge amount of the concrete powder 3 proportional to the depth of the drill hole, the scale of the discolored concrete powder 3 can be read. You can easily know the hole depth.
【0025】図3(b) は、漏斗状の容器20の管部分2
0bの下端に栓22を設けたものであり、測定後に栓2
2を取り外すことで、容器20内を簡単に洗うことがで
きる。図3(c) は、管部分20bを逆錐体部分20aに
着脱自在に取付けたものであり、さらに洗いやすく、ま
た部品の交換も可能となる。FIG. 3B shows a tube portion 2 of a funnel-shaped container 20.
0b is provided with a stopper 22 at the lower end.
By removing 2, the inside of the container 20 can be easily washed. FIG. 3 (c) shows that the tube portion 20b is detachably attached to the inverted cone portion 20a, so that it is easier to wash and the parts can be replaced.
【0026】なお、以上はコンクリート基礎の測定につ
いて説明したが、これに限らず、その他のコンクリート
の測定にも本発明を適用することができること言うまで
もない。The measurement of concrete foundation has been described above. However, it is needless to say that the present invention is not limited to this and can be applied to measurement of other concrete.
【0027】[0027]
【発明の効果】本発明は、以上のような構成からなるの
で、次のような効果を奏することができる。 (1) コアの抜き取りと比べて、非破壊に近く、簡単に安
価に中性化深さの測定を行うことができるドリル法にお
いて、試薬の入った容器をコンクリート表面に固定する
ため、1人で簡単に安全に測定作業を行うことができ、
省力化および作業効率の向上を図ることができる。 (2) 測定装置が簡易で軽量であり、装置コストの低減お
よび作業性の向上を図ることができる。 (3) 変色したときのドリル穴の深さあるいはコンクリー
ト粉の量を計測するため、正確に中性化深さを測定する
ことができる。また、試薬に液体試薬を用いることがで
き、乾燥による測定誤差を防止することができる。 (4) 多点での測定も簡単に行うことができ、より正確な
測定が可能となる。Since the present invention has the above-described configuration, the following effects can be obtained. (1) In order to fix the container containing the reagent on the concrete surface by the drill method, which is more non-destructive than the core extraction and can measure the neutralization depth easily and inexpensively, one person Measurement can be performed easily and safely.
Labor saving and work efficiency can be improved. (2) The measuring device is simple and lightweight, which can reduce the cost of the device and improve the workability. (3) Since the depth of the drill hole or the amount of concrete powder when discoloration is measured, the neutralization depth can be accurately measured. In addition, a liquid reagent can be used as a reagent, and measurement errors due to drying can be prevented. (4) Measurement at multiple points can be easily performed, and more accurate measurement can be performed.
【図1】本発明のコンクリートの中性化測定方法を実施
するため測定装置の1例を示す斜視図である。FIG. 1 is a perspective view showing an example of a measuring device for implementing a method for measuring carbonation of concrete according to the present invention.
【図2】図1の測定装置の変形例を示す斜視図である。FIG. 2 is a perspective view showing a modification of the measuring device of FIG.
【図3】本発明のコンクリートの中性化測定方法を実施
するため測定装置の他の例を示す斜視図である。FIG. 3 is a perspective view showing another example of a measuring device for implementing the concrete neutralization measuring method of the present invention.
【図4】従来のろ紙を用いたドリル法による中性化測定
方法を示す側面図である。FIG. 4 is a side view showing a conventional method for measuring neutralization by a drill method using filter paper.
【図5】従来の粘着部材移動式のドリル法による中性化
測定方法を示す斜視図である。FIG. 5 is a perspective view showing a conventional method for measuring neutralization by a drill method of moving an adhesive member.
1…コンクリート(コンクリート基礎) 2…ドリル本体 2a…ドリル 3…コンクリート粉 10…測定装置 11…容器 12…仕切板 13…試薬 14…測定点(穿孔箇所) 15…ドリルの位置決め穴 16…フィルタ 20…漏斗状の容器 20a…逆錐体部分 20b…管部分 21…目盛り 22…栓 DESCRIPTION OF SYMBOLS 1 ... Concrete (concrete foundation) 2 ... Drill body 2a ... Drill 3 ... Concrete powder 10 ... Measuring device 11 ... Container 12 ... Partition plate 13 ... Reagent 14 ... Measurement point (perforation location) 15 ... Drill positioning hole 16 ... Filter 20 ... funnel-shaped container 20a ... inverted cone part 20b ... pipe part 21 ... scale 22 ... stopper
Claims (1)
コンクリート粉のアルカリ性を検知してコンクリートの
中性化深さを測定する方法であり、 試薬の入った容器を穿孔箇所の下方に固定し、容器内に
落下したコンクリート粉が変色した時の穿孔深さまたは
変色した時の容器内のコンクリート粉の量からコンクリ
ートの中性化深さを求めることを特徴とするコンクリー
トの中性化測定方法。1. A method for measuring the neutralization depth of concrete by detecting the alkalinity of concrete powder discharged when drilling concrete, comprising fixing a container containing a reagent below a hole to be drilled, A method for measuring the neutralization of concrete, characterized by determining the depth of neutralization of concrete from the depth of perforation when the concrete powder dropped into the container changes color or the amount of concrete powder in the container when the color changes.
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JP2000226977A JP3592212B2 (en) | 2000-07-27 | 2000-07-27 | Concrete neutralization measurement method |
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JP2000226977A JP3592212B2 (en) | 2000-07-27 | 2000-07-27 | Concrete neutralization measurement method |
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