JPH01152012A - Cooling method for concrete material - Google Patents
Cooling method for concrete materialInfo
- Publication number
- JPH01152012A JPH01152012A JP31250787A JP31250787A JPH01152012A JP H01152012 A JPH01152012 A JP H01152012A JP 31250787 A JP31250787 A JP 31250787A JP 31250787 A JP31250787 A JP 31250787A JP H01152012 A JPH01152012 A JP H01152012A
- Authority
- JP
- Japan
- Prior art keywords
- water
- kneading
- refrigerant gas
- aggregate
- gas
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/46—Arrangements for applying super- or sub-atmospheric pressure during mixing; Arrangements for cooling or heating during mixing, e.g. by introducing vapour
- B28C5/468—Cooling, e.g. using ice
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/0007—Pretreatment of the ingredients, e.g. by heating, sorting, grading, drying, disintegrating; Preventing generation of dust
- B28C7/0023—Pretreatment of the ingredients, e.g. by heating, sorting, grading, drying, disintegrating; Preventing generation of dust by heating or cooling
- B28C7/0038—Cooling, e.g. using ice
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、生コンクリートの混練に際して、コンクリ
ート材料を冷却する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for cooling concrete material during mixing of fresh concrete.
（従来の技術）
一般に、生コンクリートは石灰石や粒土の焼結粉、プラ
イアッシュが主成分であるセメントと、これに骨材であ
る小石や砂を混ぜて混練用の水で均一に練ることにより
作られるが、この混練に際してセメントと水が反応して
水和熱と称する反応熱が発生する。(Conventional technology) Generally, ready-mixed concrete is made by mixing cement, whose main components are limestone, sintered powder of granular soil, and ply ash, with aggregates such as pebbles and sand, and kneading the mixture uniformly with mixing water. However, during this kneading, cement and water react and a reaction heat called heat of hydration is generated.
この反応熱の上昇がコンクリートのひび割れや強度低下
の原因となることから、反応熱の上昇を抑えるために従
来より、例えば第２図に示すようなコンクリート材料を
冷却する方法が提案されている（特開昭６１−２２０８
０６号公報）。This increase in reaction heat causes cracks in concrete and a decrease in strength, so in order to suppress the increase in reaction heat, methods for cooling concrete materials have been proposed, such as the one shown in Figure 2. Japanese Patent Publication No. 61-2208
Publication No. 06).
それは、セメント容器５１及びセメント計量器５３と、
骨材容器５４及び骨材計量器５６と、混線用水供給源５
７及び混練用水計量器５９と、混線用水供給源５７と水
計量器５９と間に介在された水冷却用の水槽６０と、そ
の水槽６０内へ液化冷媒ガス（液体窒素）６５を供給す
る冷媒供給用器６４と、混練用水５８の冷却に用いられ
て水槽６０より放出される冷媒ガス６５ａを骨材容器５
４へ導入する冷媒ガス導入管６７と、コンクリートミキ
サ７０とを備え、規定量のセメント５２と規定量の骨材
５５とを規定量の混練用水５８で混練するに際し、水槽
６０内に設けた冷媒ガスノズル６１に送り込んだ液化冷
媒ガス６５で水槽６０内の水をあらかじめ冷却するとと
もに、その水の冷却に使用した冷媒ガス６Ｓａで骨材５
５を冷却するようにした方法である。It includes a cement container 51 and a cement measuring device 53,
Aggregate container 54, aggregate measuring device 56, and crosstalk water supply source 5
7, a kneading water meter 59, a water cooling water tank 60 interposed between the mixing water supply source 57, the water meter 59, and a refrigerant for supplying liquefied refrigerant gas (liquid nitrogen) 65 into the water tank 60. The refrigerant gas 65a released from the water tank 60 used for cooling the water for mixing 58 and the supply vessel 64 is transferred to the aggregate container 5.
4 and a concrete mixer 70, when mixing a specified amount of cement 52 and a specified amount of aggregate 55 with a specified amount of mixing water 58, a refrigerant gas provided in a water tank 60 is provided. The water in the water tank 60 is pre-cooled with the liquefied refrigerant gas 65 sent into the gas nozzle 61, and the aggregate 5 is cooled with the refrigerant gas 6Sa used for cooling the water.
This is a method in which 5 is cooled.
（発明が解決しようとする問題点）
一般に、コンクリートの強度は混練に際してコンクリー
トミキサ７０内へ投入されるセメント５２と、混練用水
５８との相対的な比率によって規定され、例えば理想的
な水の量はセメントに対して２０〜２５％と云われる。(Problems to be Solved by the Invention) Generally, the strength of concrete is determined by the relative ratio of cement 52 charged into the concrete mixer 70 during mixing and mixing water 58, for example, the ideal amount of water. is said to be 20 to 25% of cement.
そして規定１五り奉公が多くなれば、それだけコンクリ
ート強度が低下するため、各計量器５３・５６・５９で
正確に計量が行われるようになっている。The more concrete is used, the more the strength of the concrete decreases, so the measuring devices 53, 56, and 59 are used to accurately measure the concrete.
しかるに、上記従来例によれば、水槽６０内の水５８を
冷媒ガスノズル６１から吐出する冷媒ガス６５で冷却す
ることから、水槽６０より放出される冷媒ガス６５ａは
多量の水分を含んでおり、その冷媒ガス６５＆で骨材５
５を冷却すると、骨材５５に多量の水滴が付着する。し
かも骨材５５が小石か砂利かによって骨材に付着する水
滴の量も一定しない。このため上記従来の方法では水の
割合が骨材の内容により変動し、しかも水の割合が多く
なりがちで、それだけコンクリートの強度が低下すると
いう難点があった。However, according to the above conventional example, since the water 58 in the water tank 60 is cooled by the refrigerant gas 65 discharged from the refrigerant gas nozzle 61, the refrigerant gas 65a discharged from the water tank 60 contains a large amount of moisture, and its Refrigerant gas 65 & aggregate 5
When the aggregate 5 is cooled, a large amount of water droplets adhere to the aggregate 55. Moreover, the amount of water droplets attached to the aggregate is not constant depending on whether the aggregate 55 is pebbles or gravel. For this reason, in the above-mentioned conventional method, the proportion of water varies depending on the content of the aggregate, and the proportion of water tends to increase, which has the disadvantage that the strength of the concrete decreases accordingly.
（問題点を解決するための手段）
本発明は、上記問題点を解決するためになされたもので
あり、次のように構成される。(Means for Solving the Problems) The present invention has been made to solve the above problems, and is configured as follows.
即ち、規定量のセメントと規定量の骨材とを規定量の混
錬用水で混練するに際し、あらかじめ液化冷媒ガスで当
該水を冷却するとともに、その水の冷却に使用して気化
した冷媒ガスで骨材を冷却するようにしたコンクリート
材料の冷却方法において、冷媒ガス熱交換式冷水器を介
して混線用水を冷却することにより、水分を含まない冷
媒ガスで骨材を冷却するようにしたことを特徴とする方
法である。That is, when kneading a specified amount of cement and a specified amount of aggregate with a specified amount of mixing water, the water is cooled in advance with liquefied refrigerant gas, and the refrigerant gas that has been vaporized is used to cool the water. In a concrete material cooling method that cools the aggregate, the cross-current water is cooled through a refrigerant gas heat exchange type water cooler, and the aggregate is cooled with a refrigerant gas that does not contain water. This method is characterized by
（作 用）
本発明では、混練水の供給源と混練水計量器との間に設
けた熱交換式冷水器で混練用水を冷却するので、混練用
水の冷却に用いられた冷媒ガスを利用する場合でも、水
分を含まない冷媒ガスで骨材を冷却することができる。(Function) In the present invention, since the kneading water is cooled by the heat exchange water cooler provided between the kneading water supply source and the kneading water meter, the refrigerant gas used for cooling the kneading water is used. In some cases, the aggregate can be cooled with water-free refrigerant gas.
これにより常に安定した給水比率を維持することができ
る。This makes it possible to maintain a stable water supply ratio at all times.
（実 施 例）
第１図は本方法発明の実施例を示すコンクリート混練装
置の概要図である。(Embodiment) FIG. 1 is a schematic diagram of a concrete mixing apparatus showing an embodiment of the present method invention.
このコンクリート混線装置は、セメント２を収容したセ
メント容器１と、その下方に配置されたセメント計量器
３と、骨材５を収容した骨材容器４と、その下方に配置
した骨材計量器６と、混練用水供給源７及び水計量器９
と、混練用水供給源７と水計量器９との間に介在された
冷媒ガス熱交換式冷水器１０と、島該冷水器１０へ液化
冷媒ガス（液体窒素）１５を供給する液化冷媒ガス容器
１４と、冷水器１０のガス流出口と骨材容器底部のガス
入口とを連通し気化した冷媒ガス１５ａを骨材容器４内
へ導入する冷媒ガス導管１７と、各計量器３・６・９の
下方に配置されたコンクリートミキサ２０とを具備して
成り、規定量のセメント２と規定量の骨材５と規定量の
混練用水８とをコンクリートミキサ２０内へ投入して混
練するように構成されている。This concrete mixing device includes a cement container 1 containing cement 2, a cement measuring device 3 placed below it, an aggregate container 4 containing aggregate 5, and an aggregate measuring device 6 placed below it. , a kneading water supply source 7 and a water meter 9
, a refrigerant gas heat exchange water cooler 10 interposed between the kneading water supply source 7 and the water meter 9, and a liquefied refrigerant gas container that supplies liquefied refrigerant gas (liquid nitrogen) 15 to the water cooler 10. 14, a refrigerant gas conduit 17 that connects the gas outlet of the water cooler 10 and the gas inlet at the bottom of the aggregate container and introduces the vaporized refrigerant gas 15a into the aggregate container 4, and each of the measuring instruments 3, 6, and 9. The concrete mixer 20 is arranged below the concrete mixer 20, and is configured so that a specified amount of cement 2, a specified amount of aggregate 5, and a specified amount of mixing water 8 are introduced into the concrete mixer 20 and mixed. has been done.
上記冷水器１０は第１図に略示するように、混練用水８
を貯溜する貯溜槽１１の内部にコイル状のガス管１２を
配置して成り、液化冷媒ガス１５がガス管１２を流通す
る際に、貯溜槽１１内の混練用水８から気化熱を吸収す
ることにより、貯溜槽１１内の混練水８を冷却するよう
に構成されている。As schematically shown in FIG. 1, the water cooler 10 has kneading water 8
A coiled gas pipe 12 is arranged inside a storage tank 11 for storing liquefied refrigerant gas 15, and when the liquefied refrigerant gas 15 flows through the gas pipe 12, it absorbs vaporization heat from the kneading water 8 in the storage tank 11. The kneading water 8 in the storage tank 11 is thereby cooled.
気化熱を吸収したその冷媒ガス１５ａは冷媒ガス導管１
７を通って骨材容器４の底部に形成さ枕たガス入口より
骨材容器４内へ入り、骨材５を冷却する。The refrigerant gas 15a that has absorbed the heat of vaporization is transferred to the refrigerant gas conduit 1.
7 and enters into the aggregate container 4 through a vertical gas inlet formed at the bottom of the aggregate container 4 to cool the aggregate 5.
なお、第１図中仮想線で示すように液化冷媒ガス１５を
コンクリートミキサ２０へ導入する冷媒ガス導管１８を
付設し、必要に応じてコンクリート材えす２０内を冷却
するようにしてもよい。この場合、上記骨材５やコンク
リートミキサ２０内のコンクリート材料を冷却した冷媒
ガス１５ａは、大気中へ放出される。In addition, as shown by the imaginary line in FIG. 1, a refrigerant gas conduit 18 for introducing the liquefied refrigerant gas 15 into the concrete mixer 20 may be provided to cool the inside of the concrete slab 20 as required. In this case, the refrigerant gas 15a that has cooled the aggregate 5 and the concrete material in the concrete mixer 20 is released into the atmosphere.
上記実施例では、無害、不燃性、コスト等を考慮して液
体窒素を用いる場合について例示したが、本発明の目的
を達することができるものであれば、液体酸素、液化メ
タンガス、液化炭酸ガス等の液化冷媒ガスを使用するこ
ともできる。In the above embodiment, liquid nitrogen is used in consideration of harmlessness, nonflammability, cost, etc. However, liquid oxygen, liquefied methane gas, liquefied carbon dioxide gas, etc. can be used as long as they can achieve the purpose of the present invention. It is also possible to use liquefied refrigerant gas.
（発明の効果）
本発明によれば、混練用水を冷却するのに用いて気化し
た冷媒ガスで骨材を冷却する場合でも、その冷ＩＩ！＆
ガス中に水分を含まないので、骨材に無用の水滴が付着
するおそれはない。これにより骨材の内容が変化しても
給水割合が変化したり、規定量以上の給水量となって、
コンクリートの強度を低下させることもない。(Effects of the Invention) According to the present invention, even when aggregates are cooled with vaporized refrigerant gas used to cool kneading water, the cooling II! &
Since the gas does not contain water, there is no risk of unnecessary water droplets adhering to the aggregate. As a result, even if the content of the aggregate changes, the water supply ratio may change, or the amount of water supplied may exceed the specified amount.
It does not reduce the strength of concrete.
第１図は本発明の実施例を示すコンクリート混線装置の
概要図、第２図は従来例を示す第１図相当図である。
１・・・セメント容器、 ２・・・セメント、３・・
・セメント計量器、 ４・・・骨材容器、５・・・骨
材、 ６・・・骨材計量器、 ７・・・混線水供給源、
８・・・混練用水、 ９・・・水計量器、１０・・・
冷媒ガス熱交換式冷水器、１４・・・液化冷媒ガス容器
、 １５・・・液化冷Ｗ、ｌｆス（液体窒素）、１５
ａ・・・冷媒ガス、 １７・・・冷媒ガス導管、２０
・・・コンクリートミキサ。
特許出願人 戸田建設株式会社
第２図FIG. 1 is a schematic diagram of a concrete crosstalk device showing an embodiment of the present invention, and FIG. 2 is a diagram equivalent to FIG. 1 showing a conventional example. 1... Cement container, 2... Cement, 3...
・Cement measuring device, 4... Aggregate container, 5... Aggregate, 6... Aggregate measuring device, 7... Crosstalk water supply source,
8...Water for kneading, 9...Water meter, 10...
Refrigerant gas heat exchange type water cooler, 14... Liquefied refrigerant gas container, 15... Liquefied cold W, lfs (liquid nitrogen), 15
a... Refrigerant gas, 17... Refrigerant gas conduit, 20
...Concrete mixer. Patent applicant: Toda Construction Co., Ltd. Figure 2
Claims (1)
用水で混練するに際し、あらかじめ液化冷媒ガスで当該
水を冷却するとともに、その水の冷却に使用して気化し
た冷媒ガスで骨材を冷却するようにしたコンクリート材
料の冷却方法において、冷媒ガス熱交換式冷水器を介し
て混練用水を冷却することにより、水分を含まない冷媒
ガスで骨材を冷却するようにしたことを特徴とするコン
クリート材料の冷却方法1. When kneading a specified amount of cement and a specified amount of aggregate with a specified amount of mixing water, the water is cooled in advance with liquefied refrigerant gas, and the water is cooled with vaporized refrigerant gas. In a concrete material cooling method that cools aggregate, the mixing water is cooled through a refrigerant gas heat exchange water cooler, and the aggregate is cooled with a refrigerant gas that does not contain water. Characteristic cooling method for concrete materials
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31250787A JPH01152012A (en) | 1987-12-09 | 1987-12-09 | Cooling method for concrete material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31250787A JPH01152012A (en) | 1987-12-09 | 1987-12-09 | Cooling method for concrete material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01152012A true JPH01152012A (en) | 1989-06-14 |
| JPH0440167B2 JPH0440167B2 (en) | 1992-07-02 |
Family
ID=18030051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31250787A Granted JPH01152012A (en) | 1987-12-09 | 1987-12-09 | Cooling method for concrete material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01152012A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006018445A1 (en) * | 2004-08-20 | 2006-02-23 | Air Liquide Deutschland Gmbh | Method of producing cooled unset concrete |
| AT18255U1 (en) * | 2022-06-15 | 2024-07-15 | Air Liquide | Production of fresh concrete |
-
1987
- 1987-12-09 JP JP31250787A patent/JPH01152012A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006018445A1 (en) * | 2004-08-20 | 2006-02-23 | Air Liquide Deutschland Gmbh | Method of producing cooled unset concrete |
| AT18255U1 (en) * | 2022-06-15 | 2024-07-15 | Air Liquide | Production of fresh concrete |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0440167B2 (en) | 1992-07-02 |
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