JPH01127302A - Concrete kneading device with aggregate-precooler - Google Patents
Concrete kneading device with aggregate-precoolerInfo
- Publication number
- JPH01127302A JPH01127302A JP28675887A JP28675887A JPH01127302A JP H01127302 A JPH01127302 A JP H01127302A JP 28675887 A JP28675887 A JP 28675887A JP 28675887 A JP28675887 A JP 28675887A JP H01127302 A JPH01127302 A JP H01127302A
- Authority
- JP
- Japan
- Prior art keywords
- aggregate
- cooling air
- cooled
- air
- concrete
- 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
- 238000004898 kneading Methods 0.000 title abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 64
- 238000003860 storage Methods 0.000 claims description 45
- 239000004568 cement Substances 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 31
- 239000002245 particle Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
-
- 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
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混練設備に関し、特にセメントと
混練する前に予め骨材を冷却する骨材予冷装置付きコン
クリート混練設備に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to concrete mixing equipment, and more particularly to concrete mixing equipment equipped with an aggregate pre-cooling device that cools aggregate in advance before mixing it with cement.
近年、大型海洋土木工事等において、厚みのあるコンク
リートを一回に多量に打設するマスコンクリート工法が
増加しており、その規模も連続打設容量が２，０００ｍ
３から１０，０００ｍ”に至るものもある。In recent years, in large-scale marine civil engineering works, etc., the mass concrete method, in which a large amount of thick concrete is poured at one time, has been increasing, and the continuous pouring capacity is now 2,000 m.
Some range from 3 to 10,000 m.
マスコンクリートでは、セメントの水和熱により生ずる
熱応力を管理することが重要であり、コンクリートの打
設温度を管理することが行なわれている。In mass concrete, it is important to control the thermal stress caused by the heat of hydration of cement, and the concrete placement temperature is controlled.
一方、夏季高温時に打設したコンクリートの温度が規定
値以上にならないように施工する暑中コンクリート工法
においては、骨材および混練水の温度を下げることが行
なわれる。On the other hand, in the hot summer concrete construction method in which the temperature of concrete placed during high summer temperatures does not exceed a specified value, the temperature of aggregate and mixing water is lowered.
このように、打設コンクリートの温度を下げるには、従
来法のような方策がとられている。In this way, conventional methods are used to lower the temperature of poured concrete.
（１）コンクリート混練水の一部を氷（フレークアイス
）に代える。(1) Replace some of the concrete mixing water with ice (flake ice).
（２）混練水そのものを冷水（一般には５°Ｃ程度が限
度）とする。(2) The kneading water itself should be cold water (generally limited to about 5°C).
（３）骨材（砂および砂利）に水を散布するがまたは冷
気を吹付けて冷却する。(3) Cool the aggregates (sand and gravel) by spraying them with water or by blowing them with cold air.
（４）直射日光を避けて骨材を保存する。(4) Store aggregates away from direct sunlight.
（５）液化チッソ（ＬＮ２）を使用し細骨材を冷凍保存
する。（この方法はまだ実用化には至っていない。）
（６）液化チッソ（ＬＮ２）を直接ミキサーに噴射する
。(5) Freeze and preserve the fine aggregate using liquefied nitrogen (LN2). (This method has not yet been put to practical use.) (6) Liquefied nitrogen (LN2) is injected directly into the mixer.
このような種々の方策の内、（１）〜（０を適用した具
体的な従来の骨材予冷装置付きコンクリート混練設備は
第２図に示すように構成されている。Among these various measures, a specific conventional concrete mixing equipment with an aggregate pre-cooling device to which measures (1) to (0) are applied is constructed as shown in FIG.
すなわち、コンクリート混練装置は、骨材貯蔵槽ｌａ、
ｌｂと骨材移送手段１３．１４とバッチャ−プラント１
５とをそなえている。That is, the concrete mixing device includes an aggregate storage tank la,
lb and aggregate transfer means 13.14 and batcher plant 1
5.
骨材貯蔵槽１ａ、ｌｂは、細骨材貯蔵槽１ａと粗骨材貯
蔵槽１ｂとからなっており、それぞれの下端部には骨材
引出しゲート１２・・・１２が設けられている。骨材移
送手段１３．１４は、骨材貯蔵槽１ａ、ｌｂの下方に設
けられた骨材引出しコンベア１３と、このコンベアとバ
ッチャ−プラント１５とをつなぐ骨材供給コンベア１４
とからなっている。The aggregate storage tanks 1a and 1b consist of a fine aggregate storage tank 1a and a coarse aggregate storage tank 1b, and aggregate draw-out gates 12...12 are provided at the lower ends of each. The aggregate transfer means 13.14 includes an aggregate drawer conveyor 13 provided below the aggregate storage tanks 1a, lb, and an aggregate supply conveyor 14 that connects this conveyor with the batcher plant 15.
It consists of
骨材貯蔵槽１ ａ、１ ｂの上方には、骨材搬入コンベ
ア２が設けられており、この骨材搬入コンベア２の一側
上方には骨材搬入グランドホッパー１６が設けられてい
る。An aggregate carrying-in conveyor 2 is provided above the aggregate storage tanks 1 a, 1 b, and an aggregate carrying-in ground hopper 16 is provided above one side of this aggregate carrying-in conveyor 2.
上述の（１）〜（４）に関連する構成は、冷水装置１８
、製氷装置１９．注水または冷風装置２０および遮光屋
根２１である。冷水装置１８および製氷装置１９はバッ
チャ−プラント１５の近傍に設けられ、注水または冷風
装置２０は骨材貯蔵槽ｌａ、ｌｂの上部に設けられ、遮
光屋根２１は骨材貯蔵槽１ａ、ｌｂ上部を覆うように設
けられる。The configuration related to (1) to (4) above includes the chilled water device 18.
, ice making device 19. They are a water injection or cold air device 20 and a light shielding roof 21. A chilled water device 18 and an ice making device 19 are provided near the batcher plant 15, a water injection or cold air device 20 is provided above the aggregate storage tanks la, lb, and a light-shielding roof 21 is provided above the aggregate storage tanks 1a, lb. It is provided to cover.
このように構成される骨材予冷装置付きコンクリート混
線設備においては、骨材搬入グランドホッパー１６に投
入された骨材が、骨材搬入コンベア２を経て、それぞれ
細骨材貯蔵槽１ａまたは粗骨材貯蔵槽１ｂに貯蔵される
。貯蔵中の両骨材は遮光屋根２１により直射日光を避け
て保存されるとともに、注水または冷風装置２ｏから散
布される水または吹付けられる冷気によって冷却され適
切な温度に保たれる。In the concrete mixing facility with an aggregate pre-cooling device configured as described above, the aggregate introduced into the aggregate carrying-in ground hopper 16 passes through the aggregate carrying-in conveyor 2 and is transferred to the fine aggregate storage tank 1a or the coarse aggregate, respectively. It is stored in the storage tank 1b. Both aggregates during storage are protected from direct sunlight by the light-shielding roof 21, and are cooled and maintained at an appropriate temperature by water or cold air sprayed from the water injection or cooling air device 2o.
これらの骨材は、使用の際には骨材引出しゲート１２の
開放によって骨材引出しコンベア１３上に落され、同骨
材引出しコンベア１３がら骨材供給コンベア１４を介し
てバッチャ−プラント１５へと送り込まれる。一方、コ
ンクリート混練水は冷水装置１８により冷水化されるか
、あるいは、その一部を製氷装置１９からの氷に代えら
れ、冷却されて使用される。When in use, these aggregates are dropped onto an aggregate drawer conveyor 13 by opening the aggregate drawer gate 12, and are transported from the aggregate drawer conveyor 13 to a batcher plant 15 via an aggregate supply conveyor 14. sent. On the other hand, the concrete kneading water is cooled by the chiller 18, or a part of it is replaced with ice from the ice making device 19, and used after being cooled.
ところで、上述のような従来の骨材予冷装置付きコンク
リート混練設備では次のような問題点がある。By the way, the above-mentioned conventional concrete mixing equipment equipped with an aggregate pre-cooling device has the following problems.
前述の（１）および（２）の方法では、氷および冷水に
よるコンクリートミキシング時の冷却はわずか１０％の
材料にしか及ばず、練り上り温度におのずから限界があ
る。これは、コンクリート１ｍ”に対する材料重量比率
がそれぞれの施工現場ごとに異なるものの、一般には、
粗骨材（砂利）４５％、細骨材（砂）３０％、セメント
１５％、混練水１０％程度のものが多いことによる。ま
た練り上り直後は、特に粗骨材内部は冷却されておらず
、したがって、見掛けの打設温度と一定時間経過後のコ
ンクリート温度には大差が生じる。このような事情から
打設温度を下げたのにかかわらずヒビ割れが発生する等
この方法による効果は薄かった。In methods (1) and (2) described above, only 10% of the material is cooled by ice and cold water during concrete mixing, and there is a natural limit to the mixing temperature. Although the weight ratio of the material to 1m of concrete differs depending on each construction site, in general,
This is because most of the materials are about 45% coarse aggregate (gravel), 30% fine aggregate (sand), 15% cement, and 10% mixing water. Immediately after mixing, the inside of the coarse aggregate is not particularly cooled, so there is a large difference between the apparent casting temperature and the concrete temperature after a certain period of time has elapsed. Due to these circumstances, cracks occurred despite lowering the pouring temperature, so this method was not very effective.
（３）の方法では、骨材に散水（特に冷水が効果的）す
るので温度は下がるものの、
（イ）大量の骨材（例えば２，０００ｍ３連続打ちの場
合粗骨材約１，５００ｍ３．細骨材約１ 、ＯＯ０ｍ３
）を平均した温度に冷やせない。In method (3), the aggregate is sprinkled with water (cold water is particularly effective), which lowers the temperature; Aggregate approx. 1, OO0m3
) cannot be cooled to an average temperature.
（ロ）もともと骨材の含水比に応じて混練水の量を調整
する必要があるのに、散水により細骨材の含水比は一層
不均一となり練り上りコンクリートの品質にバラツキが
生じる。(b) Although it is originally necessary to adjust the amount of mixing water according to the water content ratio of the aggregate, water sprinkling makes the water content ratio of the fine aggregate even more uneven, resulting in variations in the quality of the mixed concrete.
また、冷気を吹きつける方法ではサイロまたはホッパー
等に貯蔵された骨材全体が冷却されるまでには至らず改
良が必要である。Furthermore, the method of blowing cold air does not cool down the entire aggregate stored in a silo or hopper, and improvements are needed.
（４）の方法は、陸上での野積みには適用できない。Method (4) cannot be applied to open storage on land.
（５）の方法は、液化チッソの供給および貯蔵槽の防熱
構造の面で解決しなければならない問題があり、マスコ
ンクリート工法への適用には未だ至っていない。Method (5) has problems that must be solved in terms of the supply of liquefied nitrogen and the heat-insulating structure of the storage tank, and has not yet been applied to mass concrete construction methods.
（６）の方法は、液化チッソの供給および前記（＋）お
よび（２）で述べた見掛は上の打設温度に問題がある。Method (6) has problems with the supply of liquefied nitrogen and the apparent casting temperature mentioned in (+) and (2) above.
本発明は、これらの問題点の解決をはかろうとするもの
で、使用する骨材をその全体にわたって予め一様に冷却
するうえで従来困難であった、冷却空気の骨材間隙への
十分な分散の問題を、骨材中の下方にウェルポイントを
設けるということで解決して、練り上りコンクリート温
度を均一に下げるようにするとともに、混練前の骨材の
含水比を一定に保って練り上りコンクリートの品質を一
定化するようにした骨材予冷装置付きコンクリート混練
設備を提供することを目的とする。The present invention aims to solve these problems, and it has been difficult in the past to uniformly cool the aggregate used over its entirety. The problem of dispersion was solved by providing a well point in the lower part of the aggregate, which lowered the temperature of the mixed concrete uniformly, and also kept the moisture content of the aggregate constant before mixing. The purpose of the present invention is to provide concrete mixing equipment with an aggregate pre-cooling device that stabilizes the quality of concrete.
Ｃ問題点を解決するための手段〕
上述の目的を達成するため、本発明の骨材予冷装置付き
コンクリート混練設備は下端部に骨材引出しゲートを有
する骨材貯蔵槽と、同骨材貯蔵槽め下方で上記骨材引出
しゲートから骨材を受けて同骨材を移送する骨材移送手
段と、同骨材移送手段により移送されてきた骨材を受け
てセメントとともにコンクリートを混練するバッチャ−
プラントとをそなえ、上記骨材貯蔵槽を密閉しうる囲壁
と同囲壁に施された防熱層とが設けられるとともに、上
記囲壁内へ冷却空気を圧入して上記骨材貯蔵槽の上部か
ら下方へ流通させるための冷却空気供給手段と、同冷却
空気供給手段へ冷却空気を供給し得る冷却空気供給系と
、上記冷却空気と同冷却空気により凝縮された上記骨材
貯蔵槽内の水分とを吸収し得るウェルポイントと、同ウ
ェルポイントから上記の冷却空気と水分とを排出し得る
流体排出系とが設けられたことを特徴としている。Means for Solving Problem C] In order to achieve the above-mentioned object, the concrete mixing equipment with an aggregate pre-cooling device of the present invention includes an aggregate storage tank having an aggregate draw-out gate at the lower end, and an aggregate storage tank having an aggregate draw-out gate at the lower end. An aggregate transfer means that receives aggregate from the aggregate draw-out gate and transfers the aggregate below, and a batcher that receives the aggregate transferred by the aggregate transfer means and mixes concrete with cement.
A surrounding wall capable of sealing the aggregate storage tank and a heat insulating layer applied to the surrounding wall are provided, and cooling air is forced into the surrounding wall to flow downward from the upper part of the aggregate storage tank. A cooling air supply means for circulating, a cooling air supply system capable of supplying cooling air to the cooling air supply means, and absorbing the cooling air and moisture in the aggregate storage tank condensed by the cooling air. The present invention is characterized in that it is provided with a well point capable of discharging the cooling air and moisture from the well point, and a fluid discharge system capable of discharging the cooling air and moisture from the well point.
上述の本発明の骨材予冷装置付きコンクリート混練設備
では、骨材貯蔵槽に貯蔵中の骨材は、囲壁によって囲ま
れた骨材貯蔵槽の上部空間に冷却空気供給系から送られ
、冷却空気供給手段から圧入される加圧冷却空気により
冷却される。加圧送入された空気は、骨材粒子間の間隙
を通って骨材を冷却しながら下方へ流れ、その間に骨材
中の水分を吸収しつつ下降し、最後に骨材槽下部のウェ
ルポイントに集められる。ウェルポイントに集められた
吸湿空気は流体排出系を通り排出される。In the above-described concrete mixing equipment with an aggregate pre-cooling device of the present invention, the aggregates stored in the aggregate storage tank are sent from the cooling air supply system to the upper space of the aggregate storage tank surrounded by the surrounding wall, and the cooling air is supplied to the upper space of the aggregate storage tank surrounded by the surrounding wall. It is cooled by pressurized cooling air that is forced in from the supply means. The pressurized air flows downward while cooling the aggregate through the gaps between the aggregate particles, while absorbing moisture in the aggregate, and finally reaches the well point at the bottom of the aggregate tank. are collected in. Humid air collected at the well point is exhausted through a fluid exhaust system.
一方、このようにして冷却・除湿された骨材は、その使
用に際して、骨材貯蔵槽下端部の骨材引出しゲートから
引出される。On the other hand, when the aggregate thus cooled and dehumidified is used, it is drawn out from the aggregate draw-out gate at the lower end of the aggregate storage tank.
次に本発明の実施例について説明すると、第１図は本発
明の一実施例としての骨材予冷装置付きコンクリート混
練設備を示す縦断面図である。Next, an embodiment of the present invention will be described. Fig. 1 is a longitudinal cross-sectional view showing a concrete mixing equipment equipped with an aggregate pre-cooling device as an embodiment of the present invention.
第１図に示すように、骨材予冷装置付きコンクリート混
線設備は骨材貯蔵槽１ａ、ｌｂと骨材移送手段１３．１
４とバッチャープラ、ント１５とを備えている。骨材貯
蔵槽１ａ、ｌｂは、２種以上の粒径の砂を混合した細骨
材を貯蔵する細骨材貯蔵槽１ａと３種以上の粒径の砂利
を混合した粗骨材を貯蔵する粗骨材貯蔵槽１ｂとからな
っている。As shown in Fig. 1, the concrete mixed line equipment with aggregate pre-cooling device includes aggregate storage tanks 1a, lb and aggregate transfer means 13.1.
4 and Batcherpura, 15. The aggregate storage tanks 1a and lb store fine aggregate mixed with sand of two or more types of particle sizes, and coarse aggregate mixed with gravel of three or more types of particle sizes. It consists of a coarse aggregate storage tank 1b.
両骨材貯蔵槽１ａ、ｌｂの下端部には骨材引出しゲート
１２・・・１２が設けられている。Aggregate draw-out gates 12...12 are provided at the lower ends of both aggregate storage tanks 1a, lb.
骨材移送手段１３．１４は、骨材貯蔵槽１ａ。The aggregate transfer means 13.14 is an aggregate storage tank 1a.
ｌｂの下方からバッチャ−プラント１５方向へ向かう骨
材引出しコンベア１３と、この骨材引出しコンベア１３
とバッチャ−プラント１５とをつなぐ骨材供給コンベア
１４とからなっている。an aggregate drawer conveyor 13 that goes from below the batcher plant 15, and this aggregate drawer conveyor 13;
and a batcher plant 15.
バッチャ−ブラン１−１５は図示しない骨材２次貯蔵ビ
ン、計量器、ミキサー等を有しており、このバッチャ−
プラント１５中のミキサー等へ冷水装置１８および製氷
装置１９が接続されている。Batcher Bran 1-15 has a secondary aggregate storage bin, a scale, a mixer, etc. (not shown), and this batcher
A chilled water device 18 and an ice making device 19 are connected to a mixer and the like in the plant 15.
骨材貯蔵槽１ａ、ｌｂの上方には、骨材搬入コンベア（
トリッパコンベア）２が設けられており、この骨材搬入
コンベア２の一側上方に骨材搬入グランドホッパー１６
が設けられている。Above the aggregate storage tanks 1a and lb, an aggregate carrying conveyor (
An aggregate transport ground hopper 16 is provided above one side of the aggregate transport conveyor 2.
is provided.
骨材貯蔵槽１ａ、ｌｂは骨材搬入コンベア２も含めて囲
壁１７によって密閉されている。このように骨材搬入コ
ンベア２を囲壁１７内に配置するのは、骨材搬入コンベ
ア２を囲壁１７の外部に置いた場合と比べて、投入口の
数を減少させ得る結果、囲壁の密閉が容易となるからで
ある。したがって、骨材搬入コンベア２への骨材投入口
には囲壁土部の密閉のために骨材投入蓋３が設けられる
。The aggregate storage tanks 1a, lb, including the aggregate carrying-in conveyor 2, are sealed by a surrounding wall 17. By arranging the aggregate conveyor 2 inside the surrounding wall 17 in this way, compared to placing the aggregate carrying conveyor 2 outside the surrounding wall 17, the number of input ports can be reduced, and as a result, the sealing of the surrounding wall is improved. This is because it becomes easier. Therefore, an aggregate input lid 3 is provided at the aggregate input port to the aggregate carry-in conveyor 2 to seal the surrounding earth part.
骨材貯蔵槽１ａ、ｌｂの下方はこれらの櫂の各ホッパー
が囲壁を構成し、骨材引出しゲート１２が密閉手段とな
っている。なお、囲壁１７には防熱層１７’が施されて
いる。Below the aggregate storage tanks 1a and 1b, the hoppers of these paddles constitute a surrounding wall, and the aggregate draw-out gate 12 serves as a sealing means. Note that the surrounding wall 17 is provided with a heat shielding layer 17'.
このように構成された囲壁１７内へ冷却空気を圧入する
手段として、同囲壁１７内上方部に冷却空気給気ダクト
５が設けられるとともに、この冷却空気給気ダクト５へ
冷却空気を供給する系としてのエアハンドリングユニッ
ト８．ダクト切換えダンパー９および外気取入口１０が
設けられている。As a means for pressurizing cooling air into the surrounding wall 17 configured as described above, a cooling air supply duct 5 is provided in the upper part of the surrounding wall 17, and a system for supplying cooling air to the cooling air supply duct 5 is provided. Air handling unit as 8. A duct switching damper 9 and an outside air intake port 10 are provided.
エアハンドリングユニット８は気水分離器、冷却コイル
および給気ファンを内蔵している。The air handling unit 8 includes a steam separator, a cooling coil, and an air supply fan.
骨材貯蔵槽１ａ、ｌｂの下方部には収集管４′が設けら
れており、収集管４′の先端に側面に円筒状フィルター
を有するウェルポイント４が設けられている。収集管４
′には流体排出系としての冷却空気排気ダクト６、排気
ファン７、ダクト切換ダンパー９および大気放出口１１
が設けられている。A collection pipe 4' is provided in the lower part of the aggregate storage tanks 1a, lb, and a well point 4 having a cylindrical filter on the side surface is provided at the tip of the collection pipe 4'. Collection tube 4
′ includes a cooling air exhaust duct 6, an exhaust fan 7, a duct switching damper 9, and an atmosphere discharge port 11 as a fluid exhaust system.
is provided.
本発明の一実施例としての骨材予冷装置付きコンクリー
ト混線設備はこのように構成されており、骨材搬入グラ
ンドホッパー１６に投入された骨材は、骨材搬入コンベ
ア２を経て、それぞれ細骨材貯蔵槽１ａまたは粗骨材貯
蔵槽１ｂに貯蔵される。The concrete mixed line equipment with an aggregate pre-cooling device as an embodiment of the present invention is configured as described above, and the aggregate introduced into the aggregate carrying-in ground hopper 16 passes through the aggregate carrying-in conveyor 2 and is divided into fine aggregates. The aggregate is stored in the aggregate storage tank 1a or the coarse aggregate storage tank 1b.
貯蔵中の骨材は、囲壁１７によって囲まれた骨材貯蔵槽
１ａ、ｌｂの上部空間に冷却空気給気ダクト５から送入
される加圧冷却空気により冷却される。加圧送入された
冷却空気は、骨材粒子間の間隙を通って骨材を冷却しな
がら下方へ流れ、吸収した水分と共に骨材槽下部に設け
たウェルポイント４に集められ、収集管４′を介して冷
却空気排気ダクト６を通り、排気ファン７を経てエアハ
ンドリングユニット８に入る。エアハンドリングユニッ
ト８に入った空気は、その中の冷却装置（冷却コイルと
気水分離器とから成る）で冷却脱湿された後、給気７ア
ンによって再度骨材槽１ ａ、１ ｂの上部へ送られる
。このサイクルを一定時間繰返すと骨材は所定の温度に
冷却される。The aggregates being stored are cooled by pressurized cooling air sent from the cooling air supply duct 5 into the upper space of the aggregate storage tanks 1a, 1b surrounded by the surrounding wall 17. The pressurized cooling air flows downward while cooling the aggregate through the gaps between the aggregate particles, and is collected together with the absorbed moisture in the well point 4 provided at the bottom of the aggregate tank, and then passed through the collection pipe 4'. The cooling air passes through the exhaust duct 6 through the exhaust fan 7 and enters the air handling unit 8. The air that has entered the air handling unit 8 is cooled and dehumidified by a cooling device (consisting of a cooling coil and a steam/water separator) therein, and then is returned to the aggregate tanks 1a and 1b by 7 amps of air supply. Sent to the top. When this cycle is repeated for a certain period of time, the aggregate is cooled to a predetermined temperature.
このようにして冷却された骨材は、使用に当たっては、
骨材引出しゲート１２の開放によって骨材引出シコンベ
ア１３上に落され、同骨材引出しコンベア１３から骨材
供給コンベア１４を介してバッチャ−プラント１５へと
送り込まれる。その後、骨材はバッチャ−プラント１５
の骨材２次貯蔵ビン、計量器を経てミキサーへと送られ
る。一方、コンクリート混練水は冷却装置８により冷水
化されるか、あるいは、その一部を製氷装置１９からの
氷に代えられ、冷却されて使用される。When using the aggregate cooled in this way,
When the aggregate pull-out gate 12 is opened, the aggregate is dropped onto the aggregate pull-out conveyor 13 and sent from the aggregate pull-out conveyor 13 to the batcher plant 15 via the aggregate supply conveyor 14. After that, the aggregate is produced in Batcher Plant 15
The aggregate is sent to the mixer via a secondary storage bin and a scale. On the other hand, the concrete mixing water is cooled by the cooling device 8, or a part of it is replaced with ice from the ice making device 19, and used after being cooled.
以上、本発明の一実施例としての骨材予冷装置付きコン
クリート混練設備について述べたが、本発明は上記実施
例に限定されるものではなく、例えば骨材引出し後ミキ
サー投入までの温度上昇をおさえるためコンベアスペー
ス、バッチャ−プラントへの供給コンベア、骨材２次貯
蔵ビン、計量器、ミキサー等のプラントスペース全体す
なわちプラント建屋全体を冷房してもよいし、冷却開始
直後の引出し空気は高温・多湿となるのでダクト切換ダ
ンパーを切換えて、大気放出口を介して、むしろ大気へ
放出し、新たに冷却用空気を外気取入口から取入れて冷
却の効率化をはかり、時間の経過につれて適宜の時期に
ダクト切換ダンパーを切換えて循環方式にするように動
作させるようにしてもよい等、特許請求の範囲に記載の
範囲内で適宜変更可能である。The concrete mixing equipment with an aggregate pre-cooling device has been described above as an embodiment of the present invention, but the present invention is not limited to the above embodiment. The entire plant space, including the conveyor space, the supply conveyor to the batcher plant, secondary aggregate storage bins, scales, mixers, etc., or the entire plant building, can be cooled, or the drawn air immediately after cooling starts is hot and humid. Therefore, by switching the duct switching damper, the air is released into the atmosphere through the air outlet, and new cooling air is taken in from the outside air intake to improve cooling efficiency, and as time passes, the air is released at an appropriate time. Changes can be made as appropriate within the scope of the claims, such as by switching the duct switching damper to operate the circulation system.
なお、本発明について、骨材を冷却するものとして述べ
たが、冷却空気供給系を加熱系とすれば、冬期における
骨材を加熱する寒中コンクリート打設設備としても使用
し得ることはもちろんである。Although the present invention has been described as a system for cooling aggregates, it goes without saying that if the cooling air supply system is a heating system, it can also be used as cold concrete placement equipment for heating aggregates in the winter. .
以上詳述したように、本発明の骨材予冷装置付きコンク
リート混練設備によれば、次のような効果ないし利点が
得られる。As detailed above, according to the concrete mixing equipment with an aggregate pre-cooling device of the present invention, the following effects and advantages can be obtained.
（１）骨材貯蔵槽内に圧入される冷却空気によって骨材
がくまなく冷却されるとともに脱水されるため、マスコ
ンクリート打設における打設コンクリートの温度を下げ
ると同時に、骨材含水比を一定にして練り上りコンクリ
ートの品質を一定に保つことができる。(1) Since the aggregate is thoroughly cooled and dehydrated by the cooling air injected into the aggregate storage tank, the temperature of the poured concrete during mass concrete placement is lowered and at the same time the water content ratio of the aggregate is kept constant. The quality of the mixed concrete can be kept constant.
（２）骨材を有効に冷却することができるため、特に粗
骨材内部まで十分−様な温度にすることができ、マスコ
ンクリート表面と内部とに温度差を生じることがなくな
り、コンクリート打設後のヒビ割れが生じにくくなる。(2) Since the aggregate can be effectively cooled, it is possible to reach a sufficient temperature, especially to the inside of the coarse aggregate, and there is no temperature difference between the surface and the inside of the mass concrete, which makes it easier to place concrete. Later cracks are less likely to occur.
（３）骨材の含水比を一定にすることができるので、混
練水の量を骨材含水比に応じて修正する必要がなくなり
、バッチャ−プラントにおける混練水の制御が筒単にな
る。(3) Since the water content ratio of the aggregate can be kept constant, there is no need to modify the amount of kneading water according to the water content ratio of the aggregate, and the control of the kneading water in the batcher plant becomes simple.
第１図は本発明の一実施例としての骨材予冷装置付きコ
ンクリート混練設備を示す縦断面図、第２図は従来の骨
材予冷装置付きコンクリート混練設備を示す模式的配置
図である。
１ａ・・細骨材貯蔵槽、１ｂ・・粗骨材貯蔵槽、２・・
骨材搬入コンベア、３・・骨材投入口蓋、４・・ウェル
ポイント、４′・・収集管、５・・冷却空気給気ダクト
、６・・冷却空気排気ダクト、７・・排気ファン、８−
・エアハンドリングユニット、９・・ダクト切換ダンパ
ー、１０・・外気取入口、１１・・大気放出口、１２・
・骨材引出ゲート、１３・・骨材引出しコンベア、１４
・・骨材供給コンベア、１５・・バッチャ−プラント、
１６・・骨材搬入グランドホッパー、１７・・囲壁、１
７′・・防熱層、１８・・冷水装置、１９・・製氷装置
、２０・・注水または冷風装置、２１・・遮光屋根。
代理人 弁理士 飯 沼 義 彦
第１図
第２図FIG. 1 is a longitudinal sectional view showing concrete mixing equipment with an aggregate pre-cooling device as an embodiment of the present invention, and FIG. 2 is a schematic layout diagram showing a conventional concrete mixing equipment with an aggregate pre-cooling device. 1a...Fine aggregate storage tank, 1b...Coarse aggregate storage tank, 2...
Aggregate delivery conveyor, 3. Aggregate input port cover, 4. Well point, 4'. Collection pipe, 5. Cooling air supply duct, 6. Cooling air exhaust duct, 7. Exhaust fan, 8. −
・Air handling unit, 9.・Duct switching damper, 10.・Outside air intake, 11.・Atmospheric discharge port, 12.
・Aggregate drawer gate, 13...Aggregate drawer conveyor, 14
・・Aggregate supply conveyor, 15.・Batcher plant,
16...Grand hopper for carrying in aggregate, 17...Enclosing wall, 1
7'... Heat insulation layer, 18... Chilled water device, 19... Ice making device, 20... Water injection or cold air device, 21... Shading roof. Agent Patent Attorney Yoshihiko Iinuma Figure 1 Figure 2
Claims (1)
材貯蔵槽の下方で上記骨材引出しゲートから骨材を受け
て同骨材を移送する骨材移送手段と、同骨材移送手段に
より移送されてきた骨材を受けてセメントとともにコン
クリートを混練するバッチャープラントとをそなえ、上
記骨材貯蔵槽を密閉しうる囲壁と同囲壁に施された防熱
層とが設けられるとともに、上記囲壁内へ冷却空気を圧
入して上記骨材貯蔵槽の上部から下方へ流通させるため
の冷却空気供給手段と、同冷却空気供給手段へ冷却空気
を供給し得る冷却空気供給系と、上記冷却空気と同冷却
空気により凝縮された上記骨材貯蔵槽内の水分とを吸収
し得るウェルポイントと、同ウェルポイントから上記の
冷却空気と水分とを排出し得る流体排出系とが設けられ
たことを特徴とする骨材予冷装置付きコンクリート混練
設備。an aggregate storage tank having an aggregate draw-out gate at its lower end; an aggregate transfer means for receiving aggregate from the aggregate draw-out gate below the aggregate storage tank and transferring the aggregate; It is equipped with a batcher plant that receives the aggregate transferred by means and mixes concrete with cement, and is provided with a surrounding wall capable of sealing the aggregate storage tank and a heat-insulating layer applied to the surrounding wall. A cooling air supply means for pressurizing cooling air into the surrounding wall and distributing it from the upper part of the aggregate storage tank downward; a cooling air supply system capable of supplying cooling air to the cooling air supply means; and the cooling air. A well point capable of absorbing moisture in the aggregate storage tank condensed by the cooling air, and a fluid discharge system capable of discharging the cooling air and moisture from the well point are provided. Concrete mixing equipment with an aggregate pre-cooling device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28675887A JP2601845B2 (en) | 1987-11-13 | 1987-11-13 | Concrete kneading equipment with aggregate pre-cooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28675887A JP2601845B2 (en) | 1987-11-13 | 1987-11-13 | Concrete kneading equipment with aggregate pre-cooling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01127302A true JPH01127302A (en) | 1989-05-19 |
| JP2601845B2 JP2601845B2 (en) | 1997-04-16 |
Family
ID=17708664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28675887A Expired - Lifetime JP2601845B2 (en) | 1987-11-13 | 1987-11-13 | Concrete kneading equipment with aggregate pre-cooling device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2601845B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0367612A (en) * | 1989-08-08 | 1991-03-22 | Kumagai Gumi Co Ltd | Method of cooling aggregate |
| WO2004012916A1 (en) * | 2002-07-26 | 2004-02-12 | Linde Aktiengesellschaft | Method and device for providing cooled fresh concrete |
| JP2013022832A (en) * | 2011-07-21 | 2013-02-04 | Taisei Corp | Device and method for reducing surface water of fine aggregate |
| JP2013252631A (en) * | 2012-06-05 | 2013-12-19 | Kumagai Gumi Co Ltd | Method and system of cooling coarse aggregate |
| CN105643803A (en) * | 2015-12-17 | 2016-06-08 | 中国水利水电第八工程局有限公司 | Fine aggregate precooling device for concrete production |
-
1987
- 1987-11-13 JP JP28675887A patent/JP2601845B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0367612A (en) * | 1989-08-08 | 1991-03-22 | Kumagai Gumi Co Ltd | Method of cooling aggregate |
| WO2004012916A1 (en) * | 2002-07-26 | 2004-02-12 | Linde Aktiengesellschaft | Method and device for providing cooled fresh concrete |
| JP2013022832A (en) * | 2011-07-21 | 2013-02-04 | Taisei Corp | Device and method for reducing surface water of fine aggregate |
| JP2013252631A (en) * | 2012-06-05 | 2013-12-19 | Kumagai Gumi Co Ltd | Method and system of cooling coarse aggregate |
| CN105643803A (en) * | 2015-12-17 | 2016-06-08 | 中国水利水电第八工程局有限公司 | Fine aggregate precooling device for concrete production |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2601845B2 (en) | 1997-04-16 |
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