JPH0387655A - Ultrasonic wave transfer speed measuring method in concrete plate - Google Patents
Ultrasonic wave transfer speed measuring method in concrete plateInfo
- Publication number
- JPH0387655A JPH0387655A JP1225904A JP22590489A JPH0387655A JP H0387655 A JPH0387655 A JP H0387655A JP 1225904 A JP1225904 A JP 1225904A JP 22590489 A JP22590489 A JP 22590489A JP H0387655 A JPH0387655 A JP H0387655A
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- ultrasonic
- sensor
- ultrasonic wave
- transfer speed
- 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
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims description 19
- 230000005540 biological transmission Effects 0.000 claims abstract description 22
- 239000000523 sample Substances 0.000 claims abstract description 8
- 238000009415 formwork Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 8
- 238000005259 measurement Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000001028 reflection method Methods 0.000 description 3
- 238000012669 compression test Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、コンクリート版中の超ｉ波仏迷速度測定方法
に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for measuring ultra-i wave stray velocity in concrete slabs.
［従来の技術］
律築、土木♂）分野においては、通常のフンクリートや
高強度コンクリート（以下、これらを総称してコンクリ
ートと称す）の施工品質管理のために、あるいは既存コ
ンクリートの健全度、劣化状態の診断のためにコンクリ
ートの強度を測定することが行われており、コンクリー
ト強度測定方法としては、テストピースを用いて圧縮試
験を行う方法や、超音波探傷器を用いてコンクリート中
の超音波の伝達速度を測定し、該伝達速度に基づいて強
度を推定する方法等が採用されている。[Conventional technology] In the field of regular construction and civil engineering, it is used to control the construction quality of ordinary concrete and high-strength concrete (hereinafter collectively referred to as concrete), or to check the soundness and deterioration of existing concrete. The strength of concrete is measured in order to diagnose its condition. Concrete strength measurement methods include compression testing using test pieces, and ultrasonic flaw detectors using ultrasonic waves in concrete. A method has been adopted in which the transmission speed of the beam is measured and the strength is estimated based on the transmission speed.
［発明が解決しようとする課題］
しかしながら、上記の前者の方法、即ちテストピースを
用いて圧縮試験を行う方法は、コンクリートを打設する
度にいちいちテストピースを作成し、保存しておかなけ
ればならないので面倒であるばかりでな（、圧縮試験も
手間のかかるものである。[Problem to be solved by the invention] However, the former method described above, that is, the method of performing a compression test using a test piece, requires that a test piece be created and stored each time concrete is poured. It's not only troublesome because it doesn't work (compression tests are also time-consuming).
また、後者の超音波を用いて超音波伝達速度を測定し、
該超音波伝達速度からコンクリ・−トの強度をＨｔ ’
ｐｔ ｉる方法は、非破壊的に行える点ではイ１利であ
るが、次のような問題があった。即ち、コンクリート版
中の超音波伝達速度を測定方法としては、第５図に示す
ように、コンクリート版４３の一方の面４５に超音波発
信器４１と超音波受信器４２とを当接し、超音波発信器
４１から超音波を発信し、図中破線で示したように、コ
ンクリート版４３の他方の面４６で反射してくる超音波
反射波を超音波受信器４２で受信して、その間の時間か
ら超音波伝達速度を測定する反射法と、第６図に示すよ
うに、超音波の発信を行う送信用探触子（以下、探触子
をセンサと称す）８１を試験体であるコンクリート８３
の一方の面に、受信を行う受信用センサ８２をコンクリ
ート８３の他方の面にそれぞれ当接して、送信用センサ
８１からコンクリート８３の内部に超音波を放射し、そ
の透過波を受信用センサ８２で受信して、送信から受信
までの時間から超音波伝達速度を測定する透過法がある
が、反射法においては、支保工等の型枠４４が取り外さ
れる前の段階においても、即ち、コンクリート版４３が
若令コンクリートの場合であっても測定可能ではあるが
、しかしながら、超音波反射波が比較的微弱なため、コ
ンクリート版４３中の気泡や空隙あるいは骨材の存在、
反射面４６での乱反射の影響等により、明確に超音波反
射波を捕らえられず、正確な測定ができないという問題
があり、特に、コンクリート版４３に型枠４４を取り付
けたままの状態で測定を行う場合には、当該型枠４４が
湿っていると、図中−点鎖線で示すように、型枠４４の
裏面４７での超音波反射波も生じるため、測定がより困
難になるものである。また、透過法においては、コンク
リートを挟んで一方の面に超音波発信器を、また他方の
面に超音波受信器を設置しなければならないので、測定
装置の取り扱いが繁雑になり、特に広大なコンクリート
版のような場合には、測定者をコンクリート版の両面に
配置しなければならない等の問題があり、また、場所的
な事情から、コンクリートの他方の面側に超音波受信器
を設置するだけのスペースが確保できないような場合に
は、測定そのものが不可能となるものであり、更には、
型枠が除去された後においては測定が可能であったとし
ても、若令コンクリートの段階では支保工等の型枠が邪
魔となって測定ができないという問題も生じていた。In addition, the ultrasonic transmission speed was measured using the latter ultrasonic wave,
From the ultrasonic transmission speed, the strength of concrete is Ht'
The pt i method has the advantage of being non-destructive, but it has the following problems. That is, as a method for measuring the ultrasonic transmission speed in a concrete slab, as shown in FIG. An ultrasonic wave is emitted from a sonic transmitter 41, and the ultrasonic reflected wave reflected from the other surface 46 of the concrete slab 43 is received by an ultrasonic receiver 42, as shown by the broken line in the figure. The reflection method measures the ultrasonic transmission speed based on time, and as shown in Fig. 6, a transmitting probe (hereinafter referred to as a sensor) 81 that transmits ultrasonic waves is used in concrete, which is a test specimen. 83
A reception sensor 82 that performs reception is brought into contact with the other surface of the concrete 83 on one surface of the concrete 83, and ultrasonic waves are emitted from the transmission sensor 81 into the concrete 83, and the transmitted waves are transmitted to the reception sensor 82. There is a transmission method in which the transmission speed of ultrasonic waves is measured from the time from transmission to reception.However, in the reflection method, even before the formwork 44 of the shoring etc. Although it is possible to measure even when 43 is young concrete, the ultrasonic reflected waves are relatively weak, so the presence of air bubbles, voids, or aggregate in the concrete slab 43,
Due to the influence of diffused reflection on the reflecting surface 46, etc., the reflected ultrasonic wave cannot be clearly captured and accurate measurement cannot be performed. If the mold 44 is wet, ultrasonic waves reflected from the back surface 47 of the mold 44 will also occur, as shown by the dashed line in the figure, making measurement more difficult. . In addition, in the transmission method, it is necessary to install an ultrasonic transmitter on one side of the concrete and an ultrasonic receiver on the other side, which makes handling of the measuring equipment complicated, especially in large areas. In cases such as concrete slabs, there are problems such as having to place the measurer on both sides of the concrete slab, and due to locational circumstances, the ultrasonic receiver must be installed on the other side of the concrete. If sufficient space cannot be secured, the measurement itself will be impossible, and furthermore,
Even if measurements were possible after the formwork was removed, there was a problem that measurements could not be taken at the young concrete stage because formwork such as shoring was in the way.
本発明は、上記の課題を解決するものであって、安価で
リアルタイムに強度測定を行うことができるコンクリー
ト版中の超音波伝達速度測定方法を提供することを目的
とするものである。The present invention solves the above-mentioned problems, and an object of the present invention is to provide a method for measuring ultrasonic propagation speed in a concrete slab, which is inexpensive and can measure strength in real time.
［課題を解決するための手段］
上記の目的を達成するために、本発明のコンクリート版
中の超音波伝達速度測定方法は、コンクリートが打設さ
れる型枠の少なくとも一方の面側に設置され、コンクリ
ート版中に埋め込まれた第１の超音波センサと、コンク
リート版の他方の面倒に当接または埋め込まれた第２の
超音波センサとを設け、前記第１および第２の超音波セ
ンサの一方から所定の周波数の超音波を発信し、他方の
超音波センサで該超音波を受信することにより該コンク
リート版中の超音波伝達速度を測定することを特徴とす
る。[Means for Solving the Problems] In order to achieve the above object, the method for measuring the ultrasonic transmission velocity in a concrete slab of the present invention includes: , a first ultrasonic sensor embedded in the concrete slab, and a second ultrasonic sensor abutted on or embedded in the other side of the concrete slab; It is characterized in that the ultrasonic transmission speed in the concrete slab is measured by transmitting ultrasonic waves of a predetermined frequency from one side and receiving the ultrasonic waves with the other ultrasonic sensor.
［作用および発明の効果コ
本発明のコンクリート版中の超音波伝達速度測定方法に
よれば、■従来の透過型超音波探傷器により、若令コン
クリートを非破壊的に測定することが可能である、■テ
ストピースが不要なので強度の確認を容易に行うことが
できる、■超音波センサは安価であるので、コストの上
昇をもたらさない、■超音波センサをコンクリート版中
に埋め込むので必要な場合にはいつでもリアルタイムに
コンクリート強度を確認することができ、従って、支保
工等の型枠を従来よりも早く解体することが可能である
、という効果を得ることができるものである。[Operations and Effects of the Invention] According to the method for measuring ultrasonic transmission velocity in concrete slabs of the present invention, it is possible to non-destructively measure young concrete using a conventional transmission-type ultrasonic flaw detector. ■Since no test piece is required, strength can be easily confirmed.■Ultrasonic sensors are inexpensive, so they do not increase costs.■Ultrasonic sensors are embedded in concrete slabs, so they can be easily checked when necessary. The concrete strength can be checked in real time at any time, and therefore formwork such as shoring can be dismantled more quickly than before.
［実施例コ
以下、図面を参照しつつ実施例を説明するが、以下の説
明では床スラブのコンクリートの伝達速度を測定する場
合をとりあげる。[Example 7] An example will be described below with reference to the drawings, and the following explanation deals with the case where the transmission velocity of concrete in a floor slab is measured.
第１図は本発明に係るコンクリート版中の超音波伝達速
度測定方法の１実施例を示す図であり、図中、１はコン
クリート版、２．３はセンサ（超音波探触子）、４はパ
イプ、５はプラグ、６はコントロールユ−＝ ノ）、７
ハ”Ａ 枠９小４゜第１図に＞１１ず構成を得るため
には、まり、床スラブの型枠７を施■゛シた後に床配筋
（図示ぜプ）をｈ゛い、型枠７■・、に設定した測定偵
譚にセンザ憂およびバイブ福をセーフ叶し、 ゴン′ク
リート１をｔ］設する３、（シζ、史にセン→３を：コ
ンクリートｌ中に坤め込み、センサ３の表ｉｎｉ ｌｆ
ｈ：ｒンクリー トｌの表曲ε同じ１／ベルとする５、
これにより、第１図に示す構成が得られ、こび〕状態に
わいＣ１センサ２またはセンサ３から所定の波長くυ超
音波を送信し、センサ３またはセンサ２で透過波を受信
し５、送信からプ・信までの間の伝達時間を求めること
ができる。そしで、該伝達時間と、センサ２とセンサ３
との間の距’１１４とからコンクリ−・４１中にお（Ｊ
る超音波のｍｉｉ！速度を求めることができ、こＱ）よ
・）にしＣ得られた転達速度１ご八づい”こ数フンクリ
−） １０＞強度を推定することができる。なお、セン
サ２とセンサ３との距ｍｆ１．ｔａゝ）な方法にＪ、り
予め測定さね、コントロール、”１． 、、？−−）ト
０に入力されているものである。また、第１図においで
、フントロールコ、ニット６は従来のものと同様０）構
成を有する超音波探傷器のリントロールユニ゛、７）で
あり、超音波の送信、受信を司ると共に、伝達速度を求
める演算、強度を求める演算等の所定の演算を行うもの
である。バイブ＋１中にはセンづ２の配線が施されて↓
５す、該バ可プ４丙の配線と１ントい−ルユニット６と
の接続［、ｉブノグ５により行われる。また、第１図に
おいてはセンサ３とコントｐ−ルユニソト６と□□□接
続は省略きれているものである。FIG. 1 is a diagram showing one embodiment of the method for measuring ultrasonic transmission speed in a concrete slab according to the present invention, in which 1 is a concrete slab, 2.3 is a sensor (ultrasonic probe), and 4 is the pipe, 5 is the plug, 6 is the control unit (no), 7
In order to obtain the configuration shown in Figure 1, frame 9, small 4゜゜゜゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛Formwork 7■.. Safely fulfill the sensor and vibe luck on the measurement reconnaissance set in the formwork 7, and set the Gon'crete 1 to 3. Inset, sensor 3 table ini lf
h: 1/bell 5,
As a result, the configuration shown in FIG. 1 is obtained. It is possible to find the transmission time from to P. Then, the transmission time, sensor 2 and sensor 3
Distance between '114 and concrete 41 (J
Ultrasonic mii! The speed can be calculated, and the intensity can be estimated. Measure the distance mf1.taゝ) in advance, control, "1. ,,? --) This is what is input in g0. In addition, in Fig. 1, the lint roll unit 6 is the lint roll unit 7) of the ultrasonic flaw detector, which has the same configuration as the conventional one. It performs predetermined calculations such as calculations for calculating intensity and calculations for calculating intensity. Senzu 2 wiring is installed inside Vibe +1 ↓
5. The connection between the wiring of the bus 4 and the 1-tole unit 6 is performed by the i-bunog 5. Further, in FIG. 1, the sensor 3, control unit 6, and □□□ connections are omitted.
センサ２およびパイプ４の具体的な構成例を第２図に弔
ず。センサ２は、圧７１１振動子１２をエボキン樹勝１
３で固めｆｌもので構成きれており、該センサ２はパイ
プ４の一端部に固定ぎれている。A specific configuration example of the sensor 2 and the pipe 4 is shown in FIG. The sensor 2 is the pressure 711 vibrator 12 and the Evokin Jukatsu 1
The sensor 2 is fixed to one end of a pipe 4.
正電振動Ｆ−ｊ、 ２は、例えば、第３脚に示され゛に
いるように、円筒状となされてｇす、その直径は３０關
程度、厚さは１０１１１１程度となきれる。ま六−１圧
電娠動ｊ’−１２の表面＋５および裏面１６にはぞれぞ
れ、メツキ、蒸着等（、゛より銀の薄膜が形成されで電
極が形成されζいる７、圧電振動子１２の両面にはハン
ダ等により２本Ｑ）リード線９．１１が接続されて起り
、該リード線８および１１はパイプ・１の内部を通って
バ・イブ４の他端部に形成されている接点１７および１
８にそれぞれ接続される。For example, as shown in the third leg, the positive electric vibration F-j, 2 is formed into a cylindrical shape, with a diameter of about 30 mm and a thickness of about 101111 mm. A thin film of silver is formed by plating, vapor deposition, etc. on the front surface +5 and back surface 16 of the piezoelectric vibrator j'-12, respectively. Two lead wires 9 and 11 are connected to both sides of the pipe 12 by solder or the like, and the lead wires 8 and 11 pass through the inside of the pipe 1 and are formed at the other end of the pipe 4. Contacts 17 and 1
8 respectively.
接点１７わよび１８はコネクタ１０を構成しておす、該
コネクタＩＯにプラグ５が挿入されると、接点１７はプ
ラグ５の一方の接点と接触し、接点１８はブーフグ５の
他ノコの接点と接触りるようになされている。また、パ
イプ４の表面には目盛りが形成されごおり、該１」盛り
によりｌりのセンサ２．３の間の即離、あるいは：コン
クリートｌのＪ’Ｆ’ ８を計測することができるよう
に！ヨされにいる。Contacts 17 and 18 constitute the connector 10. When the plug 5 is inserted into the connector IO, the contact 17 contacts one contact of the plug 5, and the contact 18 contacts the other contact of the boufug 5. It is designed to make contact. In addition, a scale is formed on the surface of the pipe 4, and the 1" scale makes it possible to measure the immediate separation between the 1 sensors 2 and 3, or: J'F' 8 of the concrete 1. To! I'm in trouble.
以上、本発明のｔ実施例について説明したが、本発明は
上記実施例に限定きれるものごはなく、種々の変形が可
能である。例えば、第１図においてはセンサ３はコンク
リート１中に埋め込まれＣいるが、第４図に／」Ｘずよ
うに、−１ンクリート１の表面に当接するようにしても
よいことは当業者に明らかであ７）う。また、１−２記
実施例では床スーラブの１ンクリー、−トに゛）い゛Ｃ
説明し、たが、本発明がこれに限定されるものでないご
色は当然である。Although t embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications are possible. For example, in FIG. 1, the sensor 3 is embedded in the concrete 1, but it will be understood by those skilled in the art that the sensor 3 may be in contact with the surface of the concrete 1, as shown in FIG. It's obvious7). In addition, in the example 1-2, the first floor slab and the
However, the present invention is not limited thereto.
第１図は本発明に係るコンクリート飯山の超Ｉ゛↑波仏
違速度測才方法の見実施例の構成を示す図、第２図はセ
ンサ部の具体的な構成例を示す図、第３図は圧電振動子
の具体例を小す図、第４図は本発明の変形例を示す図、
第５図は従来の反射法によるｔｌｉ品゛波伝達速ぼ測定
力法を説明する図、第０図は従来の透過法によろ超昌波
イ五達速ｍ：測カニ方Ｕ、を説明する図ぐある。
１・・・コンクリ〜 ト版、２．３・・・センサ（超音
波探触−ｒ）、 ４・・・パイプ、 ５・・・グ′ラグ
、 ６・・・：：Ｉ ：／ ｌ・口・〜・ルユ；ット、
７・・・・型枠。
出 願 人 本多電イ”株式会社
（外１名）Fig. 1 is a diagram showing the configuration of an embodiment of the concrete Iiyama super I゛↑ wave cross speed measuring method according to the present invention, Fig. 2 is a diagram showing a specific configuration example of the sensor section, and Fig. 3 is a diagram showing a specific example of the configuration of the sensor section. The figure is a small diagram of a specific example of a piezoelectric vibrator, and FIG. 4 is a diagram showing a modification of the present invention.
Figure 5 is a diagram explaining the force method used to measure the wave propagation velocity using the conventional reflection method, and Figure 0 is a diagram explaining the method used to measure the supersonic wave velocity m: measurement method U using the conventional transmission method. There is a plan to do so. 1...Concrete plate, 2.3...Sensor (ultrasonic probe-r), 4...Pipe, 5...Glug, 6...::I:/l・Mouth... Ruyu;t,
7...Formwork. Applicant: Honda Electric Co., Ltd. (1 other person)
Claims (1)
の面側に設置され、コンクリート版中に埋め込まれた第
１の超音波探触子と、コンクリート版の他方の面側に当
接または埋め込まれた第２の超音波探触子とを設け、前
記第１および第２の超音波探触子の一方から所定の周波
数の超音波を発信し、他方の超音波探触子で該超音波を
受信することにより該コンクリート版中の超音波伝達速
度を測定することを特徴とするコンクリート版中の超音
波伝達速度測定方法。(1) A first ultrasonic probe installed on at least one side of the formwork in which concrete is placed and embedded in the concrete slab, and a first ultrasonic probe that is placed in contact with or embedded in the other side of the concrete slab. a second ultrasonic probe, one of the first and second ultrasonic probes emits ultrasonic waves of a predetermined frequency, and the other ultrasonic probe emits the ultrasonic waves. 1. A method for measuring ultrasonic transmission speed in a concrete slab, the method comprising measuring the ultrasonic transmission speed in the concrete slab by receiving:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1225904A JP2756837B2 (en) | 1989-08-30 | 1989-08-30 | Ultrasonic transmission speed measurement method in concrete slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1225904A JP2756837B2 (en) | 1989-08-30 | 1989-08-30 | Ultrasonic transmission speed measurement method in concrete slab |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0387655A true JPH0387655A (en) | 1991-04-12 |
| JP2756837B2 JP2756837B2 (en) | 1998-05-25 |
Family
ID=16836711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1225904A Expired - Fee Related JP2756837B2 (en) | 1989-08-30 | 1989-08-30 | Ultrasonic transmission speed measurement method in concrete slab |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2756837B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007003475A (en) * | 2005-06-27 | 2007-01-11 | Akebono Brake Ind Co Ltd | Method and device for concrete placement inspection |
| JP2007033139A (en) * | 2005-07-25 | 2007-02-08 | Railway Technical Res Inst | Soundness diagnosing system and soundness diagnosing method |
| JP2009025022A (en) * | 2007-07-17 | 2009-02-05 | Akebono Brake Ind Co Ltd | Concrete structure quality inspection method and concrete structure quality inspection device |
| WO2011132024A1 (en) * | 2010-04-20 | 2011-10-27 | Alexander Herbert Gibson | Embedded material testing device and method |
| KR101368196B1 (en) * | 2013-12-02 | 2014-02-28 | 한국지질자원연구원 | Apparatus for measuring wave transmission velocity and method for measuring wave transmission velocity using thereof |
| KR101703104B1 (en) * | 2015-07-31 | 2017-02-06 | 한국지질자원연구원 | Method and system for measuring acoustic wave velocity and acoustic attenuation for sediment sample |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55164353A (en) * | 1979-06-08 | 1980-12-22 | Kuraray Co Ltd | Hardening characteristic measuring unit by acoustic measurement |
| JPS59216055A (en) * | 1983-05-24 | 1984-12-06 | Fuji Bussan Kk | Sampling device of product to be tested for concrete strength measurement |
-
1989
- 1989-08-30 JP JP1225904A patent/JP2756837B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55164353A (en) * | 1979-06-08 | 1980-12-22 | Kuraray Co Ltd | Hardening characteristic measuring unit by acoustic measurement |
| JPS59216055A (en) * | 1983-05-24 | 1984-12-06 | Fuji Bussan Kk | Sampling device of product to be tested for concrete strength measurement |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007003475A (en) * | 2005-06-27 | 2007-01-11 | Akebono Brake Ind Co Ltd | Method and device for concrete placement inspection |
| JP4699108B2 (en) * | 2005-06-27 | 2011-06-08 | 曙ブレーキ工業株式会社 | Concrete placement inspection equipment |
| JP2007033139A (en) * | 2005-07-25 | 2007-02-08 | Railway Technical Res Inst | Soundness diagnosing system and soundness diagnosing method |
| JP2009025022A (en) * | 2007-07-17 | 2009-02-05 | Akebono Brake Ind Co Ltd | Concrete structure quality inspection method and concrete structure quality inspection device |
| WO2011132024A1 (en) * | 2010-04-20 | 2011-10-27 | Alexander Herbert Gibson | Embedded material testing device and method |
| KR101368196B1 (en) * | 2013-12-02 | 2014-02-28 | 한국지질자원연구원 | Apparatus for measuring wave transmission velocity and method for measuring wave transmission velocity using thereof |
| KR101703104B1 (en) * | 2015-07-31 | 2017-02-06 | 한국지질자원연구원 | Method and system for measuring acoustic wave velocity and acoustic attenuation for sediment sample |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2756837B2 (en) | 1998-05-25 |
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