JPH0376980B2 - - Google Patents
Info
- Publication number
- JPH0376980B2 JPH0376980B2 JP1577684A JP1577684A JPH0376980B2 JP H0376980 B2 JPH0376980 B2 JP H0376980B2 JP 1577684 A JP1577684 A JP 1577684A JP 1577684 A JP1577684 A JP 1577684A JP H0376980 B2 JPH0376980 B2 JP H0376980B2
- Authority
- JP
- Japan
- Prior art keywords
- crushing
- heating source
- hole
- filled
- heat
- 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
- 239000003795 chemical substances by application Substances 0.000 claims description 58
- 238000010438 heat treatment Methods 0.000 claims description 56
- 238000000034 method Methods 0.000 claims description 31
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000000292 calcium oxide Substances 0.000 claims description 11
- 238000006703 hydration reaction Methods 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 8
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 229910000514 dolomite Inorganic materials 0.000 claims description 2
- 239000010459 dolomite Substances 0.000 claims description 2
- -1 aluminate compounds Chemical class 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 claims 1
- 230000001698 pyrogenic effect Effects 0.000 claims 1
- 239000002002 slurry Substances 0.000 description 43
- 235000012255 calcium oxide Nutrition 0.000 description 10
- 238000010276 construction Methods 0.000 description 10
- 238000007796 conventional method Methods 0.000 description 9
- 239000011435 rock Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 4
- 239000002510 pyrogen Substances 0.000 description 4
- 230000003068 static effect Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000001079 digestive effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Working Measures On Existing Buildindgs (AREA)
- Disintegrating Or Milling (AREA)
Description
【発明の詳細な説明】
本発明は、岩石やコンクリート構造物を静的に
破砕する膨張性破砕剤を用いた破砕工法に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a crushing method using an expansive crushing agent for statically crushing rocks and concrete structures.
従来、岩盤、岩石やコンクリート構造物等の破
砕、解体作業には、火薬や大型機械類が用いられ
てきたが、都市あるいはその周辺で作業を行なう
ために騒音、振動、粉塵、飛石などが少ない安全
な破砕工法の開発が要望されていた。そこで開発
されたのが石灰系無機化合物を主成分とする膨張
性破砕剤の水和反応による体積膨張現象を利用
し、岩石、コンクリート等を破砕する静的な破砕
工法である。 Traditionally, explosives and large machinery have been used for crushing and demolition of bedrock, rocks, concrete structures, etc., but since the work is carried out in or around cities, there is less noise, vibration, dust, and flying stones. There was a demand for the development of a safe crushing method. Therefore, a static crushing method was developed to crush rocks, concrete, etc. by utilizing the volume expansion phenomenon caused by the hydration reaction of an expansive crushing agent whose main component is a lime-based inorganic compound.
この破砕工法の概略を説明すると、この工法
は、被破砕物としての岩盤やコンクリート構造物
に孔を穿設し、孔の内部にスラリー化した静的破
砕剤（以下、破砕剤スラリーと略記する）を充填
して行なうもので、水を含んだ破砕剤が水和反応
に伴つて膨張を起こし、被破砕物を徐々に破砕す
る。従つて、この工法によれば騒音、粉塵等の発
生を殆んど伴わない破砕作業が可能である。 To give an overview of this crushing method, this method involves drilling a hole in the rock or concrete structure to be crushed, and filling the hole with a static crushing agent (hereinafter abbreviated as crushing agent slurry). ), and the crushing agent containing water expands as a result of the hydration reaction, gradually crushing the material to be crushed. Therefore, according to this construction method, crushing work can be performed with almost no noise, dust, etc. generated.
ところが、上記の工法において破砕剤スラリー
中の水和反応が急激に進む場合には、破砕剤スラ
リーの温度が著しく上昇して含有する水が蒸気化
し、大きい蒸気圧が発生し、このため破砕前にス
ラリーが孔外部に噴出するという現象が起こる。
このため、従来のこの種の工法では、破砕剤の成
分調整等により、水和反応速度を抑えて実施され
ており、従つて破砕剤スラリーの膨張圧の発現も
緩やかとなつて、コンクリート、岩石等の被破砕
物の破砕に要する時間が長時間（通常１日〜数日
間）となるという問題を生じていた。 However, in the above method, when the hydration reaction in the crushing agent slurry rapidly progresses, the temperature of the crushing agent slurry rises significantly and the water it contains vaporizes, generating a large vapor pressure. A phenomenon occurs in which slurry gushes out of the hole.
For this reason, in this type of conventional construction method, the hydration reaction rate is suppressed by adjusting the composition of the crushing agent, etc., and the development of expansion pressure of the crushing agent slurry is therefore gradual, resulting in concrete, rock formation, etc. A problem has arisen in that it takes a long time (usually one to several days) to crush objects to be crushed.
また、この問題を解消する目的で、破砕物の孔
に充填された破砕剤スラリーを孔の開口部側から
加熱する工法が提案されている。この工法を第１
図を参照して説明すると、被破砕物１に穿設され
た孔２内部に水と混練した破砕剤スラリー３を孔
２の開口部近傍に若干残して充填する。次いで、
孔２の開口部近傍に破砕剤の水和反応を促進し、
起爆作用を有する加熱源４として酸化カルシウム
を水と混合したのちに充填するか、あるいは酸化
カルシウムを充填した後に水を吸収せしめて、酸
化カルシウムに消化反応を起こさせる。すると、
酸化カルシウムと水との反応によつて発熱が起こ
り、この加熱源４と接触する破砕剤スラリー３の
上部が加熱される。 Furthermore, in order to solve this problem, a method has been proposed in which the crushing agent slurry filled in the holes of the crushed material is heated from the opening side of the holes. This method is the first
To explain with reference to the drawings, a crushing agent slurry 3 mixed with water is filled into a hole 2 formed in an object 1 to be crushed, leaving a small amount in the vicinity of the opening of the hole 2 . Then,
Promoting the hydration reaction of the crushing agent near the opening of hole 2,
As a heating source 4 having an explosive action, calcium oxide is mixed with water and then filled, or after calcium oxide is filled, water is absorbed to cause the calcium oxide to undergo a digestive reaction. Then,
The reaction between calcium oxide and water generates heat, and the upper part of the crushing agent slurry 3 that comes into contact with the heating source 4 is heated.
上記の反応の結果、酸化カルシウム層は水酸化
カルシウム層に変化すると共に、体積膨張を起こ
して孔２開口部をタンピングする。一方、加熱源
４に接する部分近傍の破砕剤スラリー３は、急速
に水和反応を起こして温度上昇すると共に硬化
し、孔２のより深部にあるスラリーを孔２内部に
タンピングし、更に孔２深部にある破砕剤スラリ
ーは加熱されて反応が促進され、急速に膨張圧を
発現する。このため、上記改善された工法によれ
ば、被破砕物の孔２に充填された破砕剤スラリー
３が加熱源４及びこれに接する部分の破砕剤スラ
リーの硬化体による封止作用によつて噴出現象が
抑えられた状態で、短時間で高い膨張圧を生じる
ため、前述した従来工法に比べて破砕に要する時
間を短縮することができる。また、上記破砕工法
では、破砕剤スラリーを開口側より加熱すること
で、上部から下部に向かつて熱が伝達され、破砕
剤の水和反応が行われるので、水和反応後の静的
破砕剤が多孔質体の栓として働き、下部側の破砕
剤スラリーの反応によつて発生する水蒸気が閉塞
されないため、噴出現象を起こさず、短時間で岩
石、コンクリートの破砕が完了する。従つて、こ
の破砕工法によれば安全に、そして極めて速やか
に被破砕物を破砕することができる破砕工法が実
施可能となる。 As a result of the above reaction, the calcium oxide layer transforms into a calcium hydroxide layer, expands in volume, and tamps the opening of the hole 2. On the other hand, the crushing agent slurry 3 near the part in contact with the heating source 4 rapidly undergoes a hydration reaction, hardens as the temperature rises, and tamps the slurry in the deeper part of the hole 2 into the hole 2. The crushing agent slurry in the deep part is heated to accelerate the reaction and rapidly develop expansion pressure. Therefore, according to the above-mentioned improved construction method, the crushing agent slurry 3 filled in the holes 2 of the object to be crushed is ejected due to the sealing action of the heating source 4 and the hardened crushing agent slurry in the portion in contact with the heat source 4. Since high expansion pressure is generated in a short time while the phenomenon is suppressed, the time required for crushing can be shortened compared to the conventional method described above. In addition, in the above-mentioned crushing method, by heating the crushing agent slurry from the opening side, heat is transferred from the top to the bottom, and the hydration reaction of the crushing agent takes place, so the static crushing agent after the hydration reaction acts as a plug for the porous body, and the water vapor generated by the reaction of the crushing agent slurry on the lower side is not blocked, so no gushing phenomenon occurs and the crushing of rocks and concrete is completed in a short time. Therefore, according to this crushing method, it is possible to carry out a crushing method that can crush objects to be crushed safely and extremely quickly.
しかしながら、上記改善を図つた工法において
も破砕時間を有効に短縮できない場合があつた。
すなわち、上記工法では、破砕剤スラリー３の上
部に加熱源４を設置する場合、第１図に示したよ
うに加熱源４と破砕剤スラリー３との接触面が略
平面であつて、接触面積が小さい。従つて、過熱
源４から破砕剤スラリー３への熱の伝達は必ずし
も効率良く行なわれず、このために特に寒冷期に
おける作業時や、被破砕物に穿設する孔として小
径孔（例えば直径が４〜５cm以下の場合）を用い
る時は短時間で破砕ができないことがあつた。す
なわち、寒冷期では、孔周囲のコンクリートや岩
石の温度が低い為に、加熱源より発生する熱量が
周囲に拡散してしまい、破砕剤スラリーの温度を
上昇せしめることが出来ず、また小径孔を用いる
ときは、破砕剤スラリーの量に対して、熱の拡散
面である孔壁面の面積が相対的に大きい為に、加
熱源よりの熱量が周囲（被破砕物中）に拡散して
しまい、やはり破砕剤スラリーの温度を上昇させ
ることができない等が原因と考えられる。 However, even with the improved method described above, there were cases in which the crushing time could not be effectively shortened.
That is, in the above construction method, when the heating source 4 is installed above the crushing agent slurry 3, the contact surface between the heating source 4 and the crushing agent slurry 3 is substantially flat as shown in FIG. is small. Therefore, the heat transfer from the superheat source 4 to the crushing agent slurry 3 is not necessarily carried out efficiently, and for this reason, especially when working in cold seasons, small diameter holes (for example, diameter 4 5cm or less), the crushing could not be completed in a short time. In other words, in cold seasons, the temperature of the concrete and rocks around the holes is low, so the amount of heat generated from the heating source diffuses into the surrounding area, making it impossible to raise the temperature of the crushing agent slurry. When used, the area of the hole wall surface, which is a heat diffusion surface, is relatively large compared to the amount of crushing agent slurry, so the amount of heat from the heating source is diffused into the surroundings (into the object to be crushed). It is thought that the cause is that the temperature of the crushing agent slurry cannot be increased.
本発明は上記事情に鑑みてなされたもので、寒
冷な温度条件下や破砕剤充填用の孔として小径孔
（例えば直径が４〜５cm以下の孔）を用いる場合
をも含めて破砕時間の短縮を図ることができる破
砕工法を提供することを目的とする。 The present invention has been made in view of the above circumstances, and it shortens the crushing time even under cold temperature conditions and when small diameter holes (for example, holes with a diameter of 4 to 5 cm or less) are used as holes for filling crushing agent. The purpose is to provide a crushing method that can achieve the following.
以下、本発明を図面を参照して詳細に説明す
る。 Hereinafter, the present invention will be explained in detail with reference to the drawings.
本発明の膨張性破砕剤を用いた破砕工法は、被
破砕物に穿設された孔の内部に膨張性破砕剤と水
との混合物を充填し、次いで前記孔内部にその開
口部側から加熱源を充填してこの加熱源と前記混
合物とを接触せしめて行なう破砕工法において、
前記孔の開口部近傍を、前記加熱源が充填される
べき深さ程度の深さ寸法をもつて前記孔の開孔断
面積より拡大して加熱源充填部を形成し、加熱源
充填部の下部一定深さまで破砕材スラリー及び湿
潤ケーキを充填し、または加熱源充填部の下方最
底部まで破砕剤スラリー及び湿潤ケーキを充填
し、前記破砕材スラリー及び湿潤ケーキの上部に
前記加熱源を充填して同加熱源と前記破砕剤との
接触面積を拡大したことを特徴とする。 The crushing method using the expandable crushing agent of the present invention involves filling a hole drilled in an object to be crushed with a mixture of the expandable crushing agent and water, and then heating the inside of the hole from the opening side. In the crushing method, which is carried out by filling a heating source and bringing the heating source into contact with the mixture,
A heating source filling portion is formed by enlarging the vicinity of the opening of the hole to a depth approximately equal to the depth at which the heating source is to be filled, compared to the cross-sectional area of the opening of the hole; The crushing material slurry and the wet cake are filled to a certain depth in the lower part, or the crushing agent slurry and the wet cake are filled to the bottom of the heating source filling part, and the heating source is filled in the upper part of the crushing material slurry and the wet cake. The present invention is characterized in that the contact area between the heating source and the crushing agent is expanded.
第２図は、本発明の破砕工法の一例を説明する
ための図である。本発明の破砕工法では、まず従
来工法と同様に被破砕物１に破砕剤スラリーを充
填するための孔２を穿設する。この孔２は、従来
工法で用いる孔と同程度の径及び深さをもつたも
のでよい。また、本発明の工法では従来工法より
短時間で膨張圧を発生せしめて、より高い破砕力
を発現させることができるため、従来工法より径
の小さい孔を用いて破砕剤の使用量を従来より少
量とすることもできる。 FIG. 2 is a diagram for explaining an example of the crushing method of the present invention. In the crushing method of the present invention, holes 2 for filling the crushing agent slurry in the object 1 to be crushed are first drilled in the same manner as in the conventional method. This hole 2 may have the same diameter and depth as the hole used in the conventional construction method. In addition, the method of the present invention can generate expansion pressure in a shorter time than the conventional method and achieve higher crushing force, so the amount of crushing agent used can be reduced by using holes with a smaller diameter than in the conventional method. It can also be done in small amounts.
上記の孔２の開口部近傍には、その深部側の内
径寸法より若干拡径して加熱源充填部５を形成す
る。この加熱源充填部５の径は、作業環境（温度
条件等）を考慮して定めればよく、例えばより深
部の孔２の径の1.1〜３倍程度の径とすればよい。
また、加熱源充填部５の深さは、第２図に示すよ
うに充填する加熱源の厚さ寸法より若干大きい
か、あるいは同程度が好ましい。なお、上記孔２
及び加熱源充填部５を被破砕物１に穿設する順序
は、特に限定されるものではない。 Near the opening of the hole 2, a heating source filling portion 5 is formed with a diameter slightly larger than the inner diameter on the deep side. The diameter of the heating source filling portion 5 may be determined in consideration of the working environment (temperature conditions, etc.), and may be, for example, approximately 1.1 to 3 times the diameter of the deeper hole 2.
Further, the depth of the heating source filling portion 5 is preferably slightly larger than the thickness of the heating source to be filled, as shown in FIG. 2, or approximately the same. Note that the hole 2
The order in which the heating source filling part 5 is drilled into the object 1 to be crushed is not particularly limited.
上記孔２及び加熱源充填部５の穿設後に、孔２
内部には膨張性破砕剤と水とを所定の割合をもつ
て混合してなる破砕剤スラリーを、加熱源充填部
５の下方一定の深さに達する程度まで充填する。
次いで、加熱源充填部５に加熱源６を充填する。
加熱源６としては、従来工法に使用されていた発
熱性物質と同様なものが適用可能であつて、例え
ば酸化カルシウム、アルミン酸塩、か焼ドロマイ
ト、またはその他の水和反応により発熱する物
質、ガスバーナ、トーチバーナ、電熱線、たき火
等からの発生熱のうちの１種類以上からなるもの
を利用した加熱源が好適である。この発熱性物質
を加熱源６として使用するにあたつては、発熱性
物質と水とを混合した後に加熱源充填部５に充填
する方法、発熱性物質を充填後にこれに水を吸収
させる方法等を適宜選択して実施することがで
き、更には加熱源充填部５の径よりわずかに小さ
い外径を有する熱伝導性の良好な容器に前記発熱
性物質を収納し、加熱源６として用いることもで
きる。 After drilling the hole 2 and the heating source filling part 5, the hole 2
The inside is filled with a crushing agent slurry made by mixing an expandable crushing agent and water at a predetermined ratio to a certain depth below the heating source filling part 5 .
Next, the heating source filling section 5 is filled with the heating source 6 .
As the heating source 6, the same exothermic substances used in conventional construction methods can be used, such as calcium oxide, aluminate, calcined dolomite, or other substances that generate heat due to hydration reactions, A heating source using one or more of heat generated from a gas burner, a torch burner, a heating wire, a bonfire, etc. is suitable. When using this pyrogenic substance as the heating source 6, there are two methods: a method in which the pyrogen substance and water are mixed and then filled into the heating source filling part 5, and a method in which the pyrogen substance is filled and then the water is absorbed into the heating source filling part 5. Furthermore, the exothermic substance is stored in a container with good thermal conductivity and has an outer diameter slightly smaller than the diameter of the heating source filling part 5, and is used as the heating source 6. You can also do that.
しかして、上記のような本発明の破砕工法によ
れば、加熱源６と破砕剤スラリー３との接触面積
を従来工法より広くして熱の伝達効率を高めるこ
とができ、従つて破砕剤スラリー３の加熱を確実
に行なうことができる。また、加熱源充填部５が
孔２より大径であるため加熱源６で発生する熱の
一部が孔２の上部周囲の被破砕物１を加熱してそ
の温度を高めることができ、従つて、破砕剤スラ
リー３上部からの熱の散逸を抑えて破砕剤の水和
反応を効果的に促進させることができる。このた
め、第２図に示す本発明の工法によれば加熱源６
で発生する熱量がこれと広い接触面積をもつて接
触する破砕剤スラリー３に効率よく与えられ、低
温度の条件下においても破砕剤スラリーが確実に
加熱されて短時間で反応が進行し、破砕時間が従
来工法より短時間になる。 Therefore, according to the crushing method of the present invention as described above, the contact area between the heat source 6 and the crushing agent slurry 3 can be made wider than in the conventional method, thereby increasing the heat transfer efficiency. The heating described in step 3 can be performed reliably. In addition, since the heating source filling part 5 has a larger diameter than the hole 2, a part of the heat generated by the heating source 6 can heat the object 1 to be crushed around the upper part of the hole 2 and increase its temperature. Therefore, the dissipation of heat from the upper part of the crushing agent slurry 3 can be suppressed, and the hydration reaction of the crushing agent can be effectively promoted. Therefore, according to the construction method of the present invention shown in FIG.
The amount of heat generated is efficiently given to the crushing agent slurry 3 that comes in contact with the crushing agent slurry 3 with a wide contact area, and even under low temperature conditions, the crushing agent slurry is reliably heated and the reaction proceeds in a short time, resulting in crushing. Time is shorter than conventional method.
なお、第２図においては破砕剤スラリー３を加
熱源充填部５の下部に至るまで充填した例を説明
したが、破砕剤スラリーの充填量はこの例に限定
されるものではなく、加熱源充填部５内部の加熱
源６から発生する熱が効果的に伝達される範囲に
あればよく、例えば破砕剤スラリーを孔２の加熱
源充填部５の下方最低部まで充填した場合にも被
破砕物１を介して破砕剤スラリーが加熱されるた
め、破砕時間を短縮することができる。 Although FIG. 2 describes an example in which the crushing agent slurry 3 is filled to the bottom of the heating source filling part 5, the filling amount of the crushing agent slurry is not limited to this example. It is sufficient that the heat generated from the heat source 6 inside the part 5 is effectively transferred. Since the crushing agent slurry is heated through 1, the crushing time can be shortened.
以上説明したように、本発明の破砕工法は、被
破砕物に穿設された孔に破砕剤スラリーを充填す
ると共に前記孔の上端開口部に破砕剤スラリーと
接触する加熱源を配した工法において、前記孔の
開口部近傍の開孔断面積を拡大して加熱源充填部
を形成し、この加熱源充填部に発熱性物質からな
る加熱源を充填し、この加熱源と破砕剤スラリー
との熱的な接触面積を実質的に拡大した破砕工法
であるから、加熱源から破砕剤スラリーへの熱の
伝達効率に良好にして破砕剤スラリーを確実に加
熱することができる。従つて、本発明によれば寒
冷時等の低温度条件下や破砕用の孔が小径で熱の
散逸が起こり易い条件である場合にも、破砕初期
の破砕剤スラリーの上部を確実に加熱、硬化させ
て封止作用をもたせると共に、破砕剤の反応を促
進し、短時間で膨張圧を発生させて従来工法より
破砕時間を短縮することができるという効果を奏
する。 As explained above, the crushing method of the present invention is a method in which a hole drilled in an object to be crushed is filled with a crushing agent slurry, and a heating source that comes into contact with the crushing agent slurry is arranged at the upper end opening of the hole. , the cross-sectional area of the hole near the opening of the hole is expanded to form a heating source filling part, the heating source filling part is filled with a heating source made of a pyrogenic substance, and the heating source and the crushing agent slurry are connected to each other. Since this is a crushing method that substantially expands the thermal contact area, the crushing agent slurry can be reliably heated with good heat transfer efficiency from the heating source to the crushing agent slurry. Therefore, according to the present invention, the upper part of the crushing agent slurry at the initial stage of crushing can be reliably heated even under low temperature conditions such as during cold weather or when the crushing holes are small in diameter and heat dissipation is likely to occur. It has the effect of hardening to provide a sealing effect, promoting the reaction of the crushing agent, generating expansion pressure in a short time, and shortening the crushing time compared to conventional methods.
次に実施例を示して本発明を更に具体的に説明
する。 Next, the present invention will be explained in more detail with reference to Examples.
１辺が1mの立方体の無筋コンクリート供試体
を複数個作成し、これらを温度０℃の恒温室内に
１日放置して供試体の温度を０℃とした。次いで
実施例用の供試体には第３図に示すように径40
mm、深さ90cmの孔２を穿設すると共にその開口部
に径60mm、深さ15cmの加熱源充填部５を穿設し
た。また、比較用の供試体には径40mm、深さ90cm
の孔のみを穿設した。
A plurality of cubic unreinforced concrete specimens each measuring 1 m on a side were prepared and left in a thermostatic chamber at a temperature of 0°C for one day to bring the temperature of the specimen to 0°C. Next, as shown in Fig. 3, the specimen for the example had a diameter of 40 mm.
A hole 2 with a diameter of 60 mm and a depth of 90 cm was bored, and a heating source filling part 5 with a diameter of 60 mm and a depth of 15 cm was bored in the opening. In addition, the specimen for comparison has a diameter of 40 mm and a depth of 90 cm.
Only the holes were drilled.
実施例用の供試体に対しては、水比25％で混練
した膨張性破砕剤Ｓ−マイト（住友セメント(株)
製、Ｓ型、適用温度範囲５〜20℃）を加熱源充填
部５で５cmの深さに至るまで充填し、更に残り10
cmの加熱源充填部に生石灰粒を充填し、この生石
灰粒に対して50％の量の水を注いで本発明の工法
を施した。 For the test specimens used in the examples, an expandable crushing agent S-Mite (Sumitomo Cement Co., Ltd.) mixed with a water ratio of 25% was used.
(S type, applicable temperature range 5 to 20℃) is filled to a depth of 5 cm in the heating source filling section 5, and then the remaining 10
The heating source filling part of cm was filled with quicklime particles, and the construction method of the present invention was applied by pouring 50% of water to the quicklime particles.
一方、比較用の供試体に対しては、上記と同様
の破砕剤スラリー及び生石灰粒を用い、生石灰粒
を開口部まで10cmの層となるように充填し、従来
工法を施した。 On the other hand, for comparison specimens, using the same crushing agent slurry and quicklime particles as above, the quicklime particles were filled up to the opening in a layer of 10 cm, and the conventional construction method was applied.
上記の作業の結果、本発明の工法を施した供試
体は破砕剤スラリー及び加熱源の充填後、20分間
で亀裂が生じ、30分間で分割が完了した。これに
対して従来工法を施した供試体は、充填から24時
間後に亀裂が生じ、30時間後に分割した。これら
の結果から、本発明は低温度の条件下でも破砕時
間を効果的に短縮できることが確認できた。 As a result of the above work, the specimen subjected to the construction method of the present invention cracked within 20 minutes after being filled with the crushing agent slurry and heating source, and the splitting was completed within 30 minutes. In contrast, the specimen constructed using the conventional method developed cracks 24 hours after filling and was divided into pieces 30 hours later. From these results, it was confirmed that the present invention can effectively shorten the crushing time even under low temperature conditions.
第１図は従来工法を説明するための被破砕物の
断面図、第２図は本発明の工法を説明するための
被破砕物の断面図、第３図は実施例を用いた供試
体の斜視図である。
１……被破砕物、２……孔、３……破砕剤スラ
リー、５……加熱源充填部、６……加熱源。
Fig. 1 is a cross-sectional view of the object to be crushed to explain the conventional method, Fig. 2 is a cross-sectional view of the object to be crushed to explain the method of the present invention, and Fig. 3 is a cross-sectional view of the object to be crushed to explain the method of the present invention. FIG. 1... Material to be crushed, 2... Hole, 3... Crushing agent slurry, 5... Heat source filling part, 6... Heat source.
Claims (1)
剤と水との混合物を充填し、次いで前記孔内部に
その開口部側から加熱源を充填してこの加熱源と
前記混合物とを接触せしめて行なう破砕工法にお
いて、 前記孔の開口部近傍を、前記加熱源が充填され
るべき深さ程度の深さ寸法をもつて前記孔の開口
断面積より拡大して加熱源充填部を形成し、この
加熱源充填部に前記加熱源を充填することを特徴
とする膨張性破砕剤を用いた破砕工法。 ２ 前記加熱源は、酸化カルシウム、か焼ドロマ
イト、アルミン酸塩化合物及びその他の水和反応
により発熱する化合物等の発熱性物質のうちの１
種類以上と水との反応熱を利用した加熱源である
特許請求の範囲第１項記載の破砕工法。 ３ 前記加熱源は、ガスバーナ、トーチバーナ、
電熱線、たき火等により発生する熱のうちの少な
くとも１種を利用した加熱源である特許請求の範
囲第１項記載の破砕工法。[Scope of Claims] 1 A mixture of an expandable crushing agent and water is filled into a hole drilled in an object to be crushed, and then a heating source is filled into the hole from the opening side to heat the material. In the crushing method, which is carried out by bringing a source into contact with the mixture, the vicinity of the opening of the hole is expanded to a depth approximately equal to the depth to which the heating source is to be filled, and is larger than the cross-sectional area of the opening of the hole. A crushing method using an expandable crushing agent, characterized in that a heating source filling part is formed and the heating source is filled in the heating source filling part. 2. The heat source is one of pyrogenic substances such as calcium oxide, calcined dolomite, aluminate compounds, and other compounds that generate heat due to hydration reactions.
The crushing method according to claim 1, which is a heating source that utilizes the heat of reaction between different kinds of substances and water. 3 The heat source is a gas burner, a torch burner,
The crushing method according to claim 1, wherein the heating source uses at least one of heat generated by heating wires, bonfires, etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1577684A JPS60161751A (en) | 1984-01-31 | 1984-01-31 | Method of crushing construction using expansible crushing agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1577684A JPS60161751A (en) | 1984-01-31 | 1984-01-31 | Method of crushing construction using expansible crushing agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60161751A JPS60161751A (en) | 1985-08-23 |
| JPH0376980B2 true JPH0376980B2 (en) | 1991-12-09 |
Family
ID=11898213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1577684A Granted JPS60161751A (en) | 1984-01-31 | 1984-01-31 | Method of crushing construction using expansible crushing agent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60161751A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61197055A (en) * | 1985-02-27 | 1986-09-01 | 日本セメント株式会社 | Crushing apparatus |
| JPS62136253A (en) * | 1985-12-10 | 1987-06-19 | 日本油脂株式会社 | Method for crushing rock and concrete structure etc. |
| IT8909365A0 (en) * | 1989-03-15 | 1989-03-15 | Chimica Edile Artigiana Di Ghi | DEVICE TO ACCELERATE THE ACTION OF EXPANSIVE MORTARS |
| JP3112118B2 (en) * | 1992-05-18 | 2000-11-27 | 日本ピラー工業株式会社 | Spiral gaskets for automotive exhaust systems |
| JP7436263B2 (en) * | 2020-03-31 | 2024-02-21 | 太平洋マテリアル株式会社 | Conductive static crushing agent and static crushing method using the same |
-
1984
- 1984-01-31 JP JP1577684A patent/JPS60161751A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60161751A (en) | 1985-08-23 |
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