JPS6349187B2 - - Google Patents
Info
- Publication number
- JPS6349187B2 JPS6349187B2 JP18885782A JP18885782A JPS6349187B2 JP S6349187 B2 JPS6349187 B2 JP S6349187B2 JP 18885782 A JP18885782 A JP 18885782A JP 18885782 A JP18885782 A JP 18885782A JP S6349187 B2 JPS6349187 B2 JP S6349187B2
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- detection
- strength
- temperature
- specimen
- 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.)
- Expired
Links
- 238000001514 detection method Methods 0.000 claims description 26
- 238000001816 cooling Methods 0.000 claims description 5
- 239000011810 insulating material Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 8
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Sampling And Sample Adjustment (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【発明の詳細な説明】
本発明はコンクリート躯体の強度を正確に推定
確認可能にする供試体の養生装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a curing device for a specimen that enables accurate estimation and confirmation of the strength of a concrete frame.
コンクリートの躯体強度を推定する場合、従来
はコンクリート供試体を20℃標準養生、或いは現
場水中養生等により所定の材命、例えば７日や28
日等の期間まで養生し、その供試体の強度試験結
果を参考にしてコンクリートの躯体強度を推定し
ていた。ところが実際のコンクリート躯体強度
は、環境条件、部材の大きさ、セメントの水和熱
等の作用により左右され、特に生和熱等によるコ
ンクリート躯体の温度経時変化に強い影響を受け
る。しかし前述の標準養生や現場水中養生による
供試体では、コンクリート躯体の存する実際の状
態特に温度経時変化状態になく、このような供試
体によつてコンクリート躯体の強度を正確に推定
確認することができない欠点があつた。 When estimating the structural strength of concrete, conventionally concrete specimens were cured at 20°C in standard conditions or cured in water at the site to a specified material life, e.g. 7 days or 28 days.
The strength of the concrete frame was estimated by referring to the strength test results of the specimen after it had been cured for a period of several days. However, the actual strength of a concrete frame is influenced by environmental conditions, the size of the members, the heat of hydration of cement, etc., and is particularly strongly influenced by changes in the temperature of the concrete frame over time due to raw heat and the like. However, with the above-mentioned standard curing and on-site underwater curing test specimens, the actual state in which the concrete structure exists, especially the temperature change over time, is not observed, and it is not possible to accurately estimate and confirm the strength of the concrete structure using such test specimens. There were flaws.
本発明はこのような欠点を解消し、実際のコン
クリート躯体の強度を正確に推定確認し得る供試
体の養生装置を提供することを目的とするもの
で、その特徴とするところはコンクリート躯体内
の温度を検出する第１検出手段と、断熱材で囲繞
した養生槽内に収容したコンクリート供試体内の
温度を検出する第２検出手段と、前記養生槽内を
加熱或いは冷却する熱量を調節操作する操作手段
と、前記第１検出手段からの第１検出信号と前記
第２検出手段からの第２検出信号を入力し両検出
信号が等しくなるように前記操作手段に制御信号
を出力する演算手段とから構成したことにある。 The purpose of the present invention is to eliminate such drawbacks and provide a curing device for specimens that can accurately estimate and confirm the strength of an actual concrete structure. A first detection means for detecting temperature, a second detection means for detecting the temperature inside a concrete specimen housed in a curing tank surrounded by a heat insulating material, and adjusting the amount of heat to heat or cool the inside of the curing tank. an operation means; a calculation means for inputting a first detection signal from the first detection means and a second detection signal from the second detection means and outputting a control signal to the operation means so that both detection signals become equal; It is composed from
以下本発明の１実施例を図面に従つて説明す
る。 An embodiment of the present invention will be described below with reference to the drawings.
１は第１検出手段即ち第１検出センサーを示
し、該第１検出センサー１は例えば熱電対からな
りこれを打設直後のコンクリート躯体２内に埋設
した。３は養生槽を示し、該養生槽３はその側壁
及び上下面壁を断熱材により形成し、更に内部に
コンクリート供試体４を載置する例えば金属多孔
板からなる支持板５を横設した。６は前記養生槽
３内の上方部に横設した冷却管、７は該冷却管６
に冷却液を供給する冷凍機、８は該冷却管７に介
在し冷却液の供給量を調節する制御弁、９は電熱
ヒータ、１０はその電源、１１は該電熱ヒータ９
と電源１０との間を接続する導線に介在し該電熱
ヒータ９への供給電流を調節する抵抗調節器を示
し、これら制御弁８及び抵抗調節器１１により前
記操作手段を構成した。 Reference numeral 1 denotes a first detection means, that is, a first detection sensor, and the first detection sensor 1 is composed of, for example, a thermocouple, and is buried in the concrete frame 2 immediately after pouring. Reference numeral 3 denotes a curing tank. The curing tank 3 had its side walls and upper and lower walls made of a heat insulating material, and further had a support plate 5 made of, for example, a perforated metal plate installed horizontally therein, on which the concrete specimen 4 was placed. 6 is a cooling pipe installed horizontally in the upper part of the curing tank 3; 7 is the cooling pipe 6;
8 is a control valve that is interposed in the cooling pipe 7 and adjusts the supply amount of the cooling liquid; 9 is an electric heater; 10 is a power source thereof; 11 is the electric heater 9;
A resistance adjuster is shown which is interposed in a conductive wire connecting between the electric heater 9 and the power source 10 to adjust the current supplied to the electric heater 9, and the control valve 8 and the resistance adjuster 11 constitute the operating means.
１２は前記コンクリート供試体４に埋設した例
えば熱電対からなる第２検出手段即ち第２検出セ
ンサー、１３は演算手段を示し、該演算手段１３
は例えば公知の調節器からなり入力側を前記第１
検出センサー１及び第２検出センサー１２に接続
し、該第１検出センサー１からの温度T1の入力
信号を基準にして該第２検出センサー１２からの
温度T2の入力信号を比較し、両信号の偏差を少
くすべく比例、積分、微分等の制御演算動作して
前記制御弁８又は抵抗調節器１１に制御信号を出
力するようにした。 Reference numeral 12 indicates a second detection means, that is, a second detection sensor, which is, for example, a thermocouple embedded in the concrete specimen 4; 13 indicates a calculation means;
is, for example, a known regulator, and the input side is connected to the first
It is connected to the detection sensor 1 and the second detection sensor 12, and the input signal of the temperature T2 from the second detection sensor 12 is compared with the input signal of the temperature T1 from the first detection sensor 1 as a reference. In order to reduce the deviation of the signal, a control signal is output to the control valve 8 or the resistance adjuster 11 by performing control calculations such as proportional, integral, and differential operations.
かくて、打設後のコンクリート躯体２の温度
T1が水和熱等により上昇してコンクリート供試
体４の温度T2より大になると調節器１３が抵抗
調節器１１に制御信号を出力しその信号レベルに
応じて電熱ヒータ９を加熱して前記温度T2を高
くして前記温度T1に等しくなるようにし、又逆
に温度T1が温度T2よりも小のときは調節器１３
が制御弁８に制御信号を出力し冷却管６を冷却し
て前記温度T2を下げていき前記温度T1に等しく
なるようにし、かくて供試体４の温度T2は躯体
２の温度経時変化と略等しく化して該供試体４は
躯体２と同一の温度条件下にあつたことになる。
従つて供試体４の強度試験をして得られた強度は
躯体２の強度を正確に推定確認できる。ここで発
明者の実験によれば躯体２の強度と供試体４の強
度は非常に良く一致した。 Thus, the temperature of concrete frame 2 after pouring
When T 1 rises due to heat of hydration and becomes higher than the temperature T 2 of the concrete specimen 4, the regulator 13 outputs a control signal to the resistance regulator 11, and the electric heater 9 is heated according to the signal level. The temperature T 2 is raised to be equal to the temperature T 1 , and conversely, when the temperature T 1 is lower than the temperature T 2 , the regulator 13
outputs a control signal to the control valve 8 and cools the cooling pipe 6 to lower the temperature T 2 until it becomes equal to the temperature T 1 , and thus the temperature T 2 of the specimen 4 is equal to the temperature of the frame 2 over time. This means that the specimen 4 was under the same temperature conditions as the frame 2, which is approximately equal to the change in temperature.
Therefore, the strength obtained by testing the strength of the specimen 4 allows the strength of the frame 2 to be accurately estimated and confirmed. According to the inventor's experiments, the strength of the frame 2 and the strength of the specimen 4 matched very well.
尚、上記実施例では養生槽３を用いたが、この
代りにモールドそのものを用いてもよい。 In addition, although the curing tank 3 was used in the above embodiment, the mold itself may be used instead.
このように本発明によるとコンクリート供試体
をコンクリート躯体と同一の温度条件下にしたの
で、該供試体の強度試験結果から該躯体に強度試
験による損傷を与えることなく該躯体の強度を正
確に推定確認でき、かくて型枠の取り外しのため
の強度確認、マスコンクリート、寒中コンクリー
ト、水中コンクリートの躯体の強度確認、原子炉
建屋や水密構造物等のコアの切り取り不可能な構
造物の強度確認、コンクリートの断熱上昇試験や
凍結融解試験のための装置等に利用可能である効
果を有する。 In this way, according to the present invention, since the concrete specimen is subjected to the same temperature conditions as the concrete frame, the strength of the concrete frame can be accurately estimated from the strength test results of the specimen without causing damage to the frame due to the strength test. This can be used to confirm the strength of formwork for removal, to confirm the strength of mass concrete, cold concrete, and underwater concrete structures, and to confirm the strength of structures where the core cannot be cut out, such as reactor buildings and watertight structures. It has the effect of being usable as equipment for concrete adiabatic rise tests and freeze-thaw tests.
図面は本発明の１実施例の説明図である。
１…第１検出手段、２…コンクリート躯体、３
…養生槽、４…コンクリート供試体、８，１１…
操作手段、１２…第２検出手段、１３…演算手
段。
The drawings are explanatory diagrams of one embodiment of the present invention. 1... First detection means, 2... Concrete frame, 3
...Curing tank, 4...Concrete specimen, 8, 11...
Operating means, 12... second detection means, 13... calculation means.
Claims (1)
出手段と、断熱材で囲繞した養生槽内に収容した
コンクリート供試体内の温度を検出する第２検出
手段と、前記養生槽内を加熱或いは冷却する熱量
を調節操作する操作手段と、前記第１検出手段か
らの第１検出信号と前記第２検出手段からの第２
検出信号を入力し両検出信号が等しくなるように
前記操作手段に制御信号を出力する演算手段とか
らなるコンクリート強度確認用供試体の養生装
置。1. A first detection means for detecting the temperature inside the concrete frame, a second detection means for detecting the temperature inside the concrete specimen housed in a curing tank surrounded by a heat insulating material, and a means for heating or cooling the inside of the curing tank. an operation means for adjusting the amount of heat, a first detection signal from the first detection means and a second detection signal from the second detection means;
A curing device for a specimen for confirming concrete strength, comprising calculation means for inputting a detection signal and outputting a control signal to the operating means so that both detection signals are equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18885782A JPS5978988A (en) | 1982-10-27 | 1982-10-27 | Device for curing sample for testing concrete strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18885782A JPS5978988A (en) | 1982-10-27 | 1982-10-27 | Device for curing sample for testing concrete strength |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5978988A JPS5978988A (en) | 1984-05-08 |
| JPS6349187B2 true JPS6349187B2 (en) | 1988-10-03 |
Family
ID=16231064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18885782A Granted JPS5978988A (en) | 1982-10-27 | 1982-10-27 | Device for curing sample for testing concrete strength |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5978988A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63142232A (en) * | 1986-12-05 | 1988-06-14 | Shimizu Constr Co Ltd | Method and apparatus for forecasting strength development of concrete |
| JPH01113633A (en) * | 1987-10-27 | 1989-05-02 | Mitsui Constr Co Ltd | Concrete testing apparatus |
| JPH0333351U (en) * | 1989-08-07 | 1991-04-02 | ||
| JP2014013168A (en) * | 2012-07-04 | 2014-01-23 | Daiwa House Industry Co Ltd | Manufacturing method and device for test piece of structural concrete |
| JP6645760B2 (en) * | 2015-07-15 | 2020-02-14 | 株式会社竹中工務店 | Concrete strength estimation method and curing device |
| JP6822789B2 (en) * | 2016-06-27 | 2021-01-27 | 株式会社竹中工務店 | Method of confirming strength at the initial stage of hardening of concrete structure and method of determining support or formwork removal time |
-
1982
- 1982-10-27 JP JP18885782A patent/JPS5978988A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5978988A (en) | 1984-05-08 |
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