JP2648259B2 - Adiabatic curing of concrete specimens - Google Patents
Adiabatic curing of concrete specimensInfo
- Publication number
- JP2648259B2 JP2648259B2 JP3271483A JP27148391A JP2648259B2 JP 2648259 B2 JP2648259 B2 JP 2648259B2 JP 3271483 A JP3271483 A JP 3271483A JP 27148391 A JP27148391 A JP 27148391A JP 2648259 B2 JP2648259 B2 JP 2648259B2
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- curing
- heat
- concrete specimen
- 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 - Lifetime
Links
Landscapes
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Sampling And Sample Adjustment (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、コンクリート供試体の
断熱養生法に関し、とくに圧縮試験・養生温度履歴測定
等のコンクリート試験に用いる供試体の作成に当り外部
から人工的に熱授受することなくコンクリート材料から
生ずる水和熱により温度変化させるコンクリート供試体
の断熱養生法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for adiabatic curing of concrete specimens, and more particularly, to the preparation of concrete specimens used for concrete tests such as compression tests and measurement of curing temperature history, without artificial heat transfer from outside. The present invention relates to an adiabatic curing method for a concrete specimen in which the temperature is changed by heat of hydration generated from a concrete material.
【０００２】[0002]
【従来の技術】コンクリート試験に用いる供試体は主と
して次の二つの方法により作成されている。2. Description of the Related Art Specimens used for concrete tests are mainly prepared by the following two methods.
【０００３】（１）実際のコンクリート構造物の構築に
用いられるコンクリート実部材（以下、実部材とい
う。）の養生温度履歴を予め断熱温度上昇試験結果の解
析に基づいて推定し、混練後のコンクリート供試体を水
槽に入れ、水槽の水温をその推定温度履歴が得られるよ
うに制御する方法。[0003] (1) The curing temperature history of a concrete actual member (hereinafter, referred to as an actual member) used for constructing an actual concrete structure is estimated in advance based on an analysis of a result of an adiabatic temperature rise test, and the concrete after kneading. A method in which a specimen is placed in a water tank and the water temperature of the water tank is controlled so that the estimated temperature history can be obtained.
【０００４】（２）混練後のコンクリート供試体を水槽
に入れ、コンクリート供試体の温度を随時測定し、水槽
の水温をその測定されたコンクリート供試体温度に追随
させる方法。(2) A method in which a concrete specimen after kneading is placed in a water tank, the temperature of the concrete specimen is measured as needed, and the water temperature of the water tank is made to follow the measured concrete specimen temperature.
【０００５】[0005]
【発明が解決しようとする課題】実部材の養生過程にお
いては、コンクリート材料から生ずる水和熱のみが環境
以外の熱源である。しかし、上記の何れの従来方法によ
ってもコンクリート供試体が水槽の水から熱を吸収し強
制的に人口的な温度変化を受けるので、実部材の養生温
度履歴とは異なった温度変化の養生となることが避けら
れない。In the curing process of an actual member, only the heat of hydration generated from the concrete material is a heat source other than the environment. However, according to any of the above-mentioned conventional methods, the concrete specimen absorbs heat from the water in the water tank and is forcibly subjected to an artificial temperature change, so that the curing temperature history differs from the curing temperature history of the actual member. That is inevitable.
【０００６】従って、本発明の目的はコンクリート材料
から生ずる水和熱のみが環境外の加熱源であるコンクリ
ート供試体の断熱養生法を提供するにある。Accordingly, it is an object of the present invention to provide an adiabatic curing method for a concrete specimen in which only the heat of hydration generated from the concrete material is a heating source outside the environment.
【０００７】[0007]
【課題を解決するための手段】図１及び図２の実施例に
おいて、本発明によるコンクリート供試体の断熱養生法
は、両端閉鎖の有芯中空円柱状周囲壁３、底壁５、蓋７
からなる環状内部空間９中に該環状内部空間９と同心の
円に沿って複数の混練後のコンクリート供試体11を置
き、コンクリート供試体11内部で生ずる水和熱の経時的
変化、コンクリート供試体11の熱特性、断熱材壁の伝熱
特性、及び断熱材壁外の気温により前記複数のコンクリ
ート供試体の温度を変化させてなる構成を用いる。好ま
しくは、前記断熱材壁を発泡スチロール製とする。In the embodiment shown in FIGS. 1 and 2, the method for adiabatic curing of a concrete specimen according to the present invention comprises a cored hollow cylindrical peripheral wall 3, a bottom wall 5 and a lid 7 closed at both ends.
Along the annular interior space 9 concentric circles in an annular in the internal space 9 of placing concrete specimen 11 after a plurality of kneading time course of hydration heat generated within the concrete specimen 11, the concrete specimen A configuration is used in which the temperature of the plurality of concrete specimens is changed depending on the thermal characteristics of 11, heat transfer characteristics of the heat insulating material wall, and air temperature outside the heat insulating material wall. Preferably, the heat insulating material wall is made of polystyrene foam.
【０００８】[0008]
【作用】図示実施例を参照するに、本発明によればコン
クリート供試体11が外部から熱を受けるのは自然環境の
みであり、実質上コンクリート供試体11内部で生ずる水
和熱のみに起因する自己発熱型の養生温度履歴を与える
ことができる。また、材令経過に伴う温度低下の態様も
実設備の断熱的な特性のコンクリート型枠を介する自然
放熱に近い放熱によるものとなる。即ち、外部からの強
制的な熱の移動のない養生が行われ、従来方法に比し実
部材の条件に近い養生温度履歴をコンクリート供試体に
再現することができる。Referring to the illustrated embodiment, according to the present invention, it is only in the natural environment that the concrete specimen 11 receives heat from the outside, and is substantially caused only by the heat of hydration generated inside the concrete specimen 11. A self-heating curing temperature history can be provided. Further, the mode of the temperature decrease with the passage of the material age is also due to the heat radiation close to the natural heat radiation through the concrete formwork having the heat insulating properties of the actual equipment. That is, curing is performed without forcible heat transfer from the outside, and a curing temperature history closer to the condition of the actual member than in the conventional method can be reproduced in the concrete specimen.
【０００９】こうして、本発明の目的である「コンクリ
ート材料から生ずる水和熱のみが環境外の加熱源である
コンクリート供試体の断熱養生法の提供」が達成され
る。In this manner, the object of the present invention is to provide "a method of adiabatic curing of a concrete specimen in which only the heat of hydration generated from concrete material is a heating source outside the environment".
【００１０】[0010]
【実施例】発泡スチロ−ルにより図１および図２に示す
断熱材料製容器１を作成した。容器１の外形92cm、周囲
壁３の厚さＸ＝20cm、底壁５の厚さＴ1＝20cm、蓋７の
厚さＴ2＝20cm、環状内部空間９の深さ22cm、環状内部
空間９の幅13cmであった。図３にその斜視図を示す。混
練直後のコンクリートから、ブリキ製軽量型枠により直
径10cm、長さ20cmの圧縮強度試験用コンクリート供試体
11を10本作成した。上記断熱材料製容器１の内部空間９
にこれらのコンクリート供試体11を同心円状に挿入し
た。各コンクリート供試体11間、及びコンクリート供試
体11と容器１の内壁との間にそれぞれ約１cmの隙間を設
けた。EXAMPLE A container 1 made of a heat insulating material as shown in FIGS. 1 and 2 was prepared by using styrofoam. The outer shape of the container 1 is 92 cm, the thickness of the peripheral wall 3 is X = 20 cm, the thickness of the bottom wall 5 is T 1 = 20 cm, the thickness of the lid 7 is T 2 = 20 cm, the depth of the annular internal space 9 is 22 cm, and the annular internal space 9 is Was 13 cm in width. FIG. 3 shows a perspective view thereof. A concrete specimen for compressive strength test of 10cm in diameter and 20cm in length from a concrete immediately after kneading using a lightweight tin mold.
Ten 11 were made. Internal space 9 of the heat insulating material container 1
These concrete specimens 11 were inserted concentrically. A gap of about 1 cm was provided between each concrete specimen 11 and between the concrete specimen 11 and the inner wall of the container 1.
【００１１】10本のコンクリート供試体11の中の１本を
測温供試体12とし、これに熱電対15を取付け、リード線
17により熱電対15を外部の測定器（図示せず）に接続
し、ゴムテープ19により蓋７と容器下部との接触部周囲
を密封した。[0011] One of the ten concrete specimens 11 is used as a temperature measuring specimen 12, to which a thermocouple 15 is attached.
The thermocouple 15 was connected to an external measuring instrument (not shown) by 17, and the area around the contact portion between the lid 7 and the lower part of the container was sealed by rubber tape 19.
【００１２】この断熱材料製容器１を室内に放置し、コ
ンクリート供試体11の温度履歴を熱電対15によって測定
しながら所定の材令即ち養生時間の経過を待った。養生
完了後にコンクリート供試体11を容器１から取り出し、
圧縮強度試験に供した。これにより、実部材に近い養生
を施したコンクリート供試体による圧縮強度その他の試
験が可能になった。The container 1 made of a heat insulating material was left in a room, and the temperature history of the concrete specimen 11 was measured by a thermocouple 15 to wait for a predetermined material age, that is, a curing time. After curing is completed, take out the concrete specimen 11 from the container 1,
It was subjected to a compressive strength test. As a result, it became possible to conduct tests on the compressive strength and the like of concrete specimens that had been cured close to actual members.
【００１３】熱電対15をコンクリート供試体11の表面に
取付ければ、表面温度を測定できるが、コンクリート供
試体11の内部にこれを埋設すればコンクリート内部の温
度履歴の測定が可能になる。本発明者は、コンクリート
供試体11を囲む絶縁材壁、即ち周囲壁３、底壁５及び蓋
７の厚さを変えれば、コンクリート供試体11に対し一定
範囲内で各種の養生温度履歴を与え得ることを実験的に
確認した。また、絶縁材料製容器１内に入れるコンクリ
ート供試体11の組成は全て同一である必要なはく、養生
温度履歴が同一でよければ異なる組成の供試体を同時に
絶縁材料製容器１で養生することができる。異なる形状
のコンクリート供試体11を同時に絶縁材料製容器１によ
り養生することも可能であり、さらに同時に養生した複
数のコンクリート供試体11を異なる試験に供することも
できる。If the thermocouple 15 is attached to the surface of the concrete specimen 11, the surface temperature can be measured. If the thermocouple 15 is buried inside the concrete specimen 11, the temperature history inside the concrete can be measured. By changing the thickness of the insulating material wall surrounding the concrete specimen 11, that is, the peripheral wall 3, the bottom wall 5, and the lid 7, the present inventors can give the concrete specimen 11 various curing temperature histories within a certain range. Obtained experimentally. Also, it is not necessary that the compositions of the concrete specimens 11 placed in the insulating material container 1 are all the same, and if the curing temperature histories are the same, specimens of different compositions can be cured simultaneously in the insulating material container 1. Can be. It is possible to cure concrete specimens 11 of different shapes at the same time in the container 1 made of insulating material, and it is also possible to simultaneously provide a plurality of cured concrete specimens 11 for different tests.
【００１４】[0014]
【発明の効果】以上詳細に説明したように、本発明のコ
ンクリート供試体の断熱養生法は、断熱材壁で密閉した
内部空間中に混練後のコンクリート供試体を置き、主と
してコンクリート供試体内部で生ずる水和熱の経時的変
化により温度を変化させて養生するので、次の顕著な効
果を奏する。As described above in detail, according to the method for heat insulating concrete specimens of the present invention, the concrete specimens after kneading are placed in an internal space closed by a heat insulating material wall, and the concrete specimens are mainly placed inside the concrete specimens. Since the curing is performed by changing the temperature by the change over time of the generated heat of hydration, the following remarkable effects are exhibited.
【００１５】（イ）実部材における温度履歴の養生に近
い養生をすることができる。 （ロ）実部材における材令経過による自然放熱に近い放
熱の養生をすることができる。 （ハ）一定の範囲内で種々の温度履歴の養生をすること
ができる。 （ニ）複数のコンクリート供試体に対し同時に一様な養
生をすることができる。 （ホ）簡単な装置により断熱的な養生をすることができ
る。 （へ）コンクリートの品質管理手法として有効に利用で
きる。(A) Curing close to the curing of the temperature history in the actual member can be performed. (Ii) Curing of heat radiation close to natural heat radiation due to the passage of material age in the actual member can be achieved. (C) Curing of various temperature histories can be performed within a certain range. (D) Uniform curing can be simultaneously performed on a plurality of concrete specimens. (E) Adiabatic curing can be achieved with a simple device. (F) It can be used effectively as a quality control method for concrete.
【図１】本発明の実施に適する断熱材料製容器の一例の
図式的平面図である。FIG. 1 is a schematic plan view of an example of a container made of a heat insulating material suitable for carrying out the present invention.
【図２】図１の線II−IIにおける断面図である。FIG. 2 is a sectional view taken along line II-II in FIG.
【図３】図１の断熱材料製容器の斜視図である。FIG. 3 is a perspective view of the container made of a heat insulating material of FIG. 1;
１：断熱材料製容器 ３：周囲壁 ５：底壁 ７：蓋 ９：内部空間 11：コンクリート供試体 12：測温供試体 15：熱電対 17：リード線 19：ゴムテープ 1: Container made of heat insulating material 3: Peripheral wall 5: Bottom wall 7: Lid 9: Internal space 11: Concrete specimen 12: Temperature measuring specimen 15: Thermocouple 17: Lead wire 19: Rubber tape
Claims (2)
閉した環状内部空間中に該環状内部空間と同心の円に沿
って複数の混練後のコンクリート供試体を置き、コンク
リート供試体内部で生ずる水和熱の経時的変化、コンク
リート供試体の熱特性、断熱材壁の伝熱特性、及び断熱
材壁外の気温により前記複数のコンクリート供試体の温
度を変化させてなるコンクリート供試体の断熱養生法。1. A annularly in the inner space closed with cored hollow cylindrical heat insulator wall of both ends closed along the annular interior space concentric circles placed concrete specimen after a plurality of kneading concrete specimen inside time course of hydration heat generated by the thermal properties of the concrete specimen, insulation wall heat transfer characteristics, and the plurality of concrete specimen by the heat insulating material wall outside air temperature rise
Adiabatic curing of concrete specimens with varying degrees .
記断熱材壁を発泡スチロール製としてなるコンクリート
供試体の断熱養生法。2. The heat insulating curing method according to claim 1, wherein said heat insulating material wall is made of styrene foam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3271483A JP2648259B2 (en) | 1991-10-18 | 1991-10-18 | Adiabatic curing of concrete specimens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3271483A JP2648259B2 (en) | 1991-10-18 | 1991-10-18 | Adiabatic curing of concrete specimens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06201548A JPH06201548A (en) | 1994-07-19 |
| JP2648259B2 true JP2648259B2 (en) | 1997-08-27 |
Family
ID=17500678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3271483A Expired - Lifetime JP2648259B2 (en) | 1991-10-18 | 1991-10-18 | Adiabatic curing of concrete specimens |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2648259B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101101411B1 (en) * | 2009-06-29 | 2012-01-02 | 한국과학기술원 | Device and method to estimate adiabatic temperature rise of concrete |
| JP2014013168A (en) * | 2012-07-04 | 2014-01-23 | Daiwa House Industry Co Ltd | Manufacturing method and device for test piece of structural concrete |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0620999Y2 (en) * | 1988-08-18 | 1994-06-01 | 秩父生コン株式会社 | Concrete test piece curing equipment |
| JPH02300646A (en) * | 1989-05-16 | 1990-12-12 | Taisei Corp | Method for managing strength of concrete structural body |
-
1991
- 1991-10-18 JP JP3271483A patent/JP2648259B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06201548A (en) | 1994-07-19 |
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