JPH0460149B2 - - Google Patents
Info
- Publication number
- JPH0460149B2 JPH0460149B2 JP58139359A JP13935983A JPH0460149B2 JP H0460149 B2 JPH0460149 B2 JP H0460149B2 JP 58139359 A JP58139359 A JP 58139359A JP 13935983 A JP13935983 A JP 13935983A JP H0460149 B2 JPH0460149 B2 JP H0460149B2
- Authority
- JP
- Japan
- Prior art keywords
- expansion pressure
- agent
- weight
- blast furnace
- parts
- 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
- 239000003795 chemical substances by application Substances 0.000 claims description 30
- 230000001066 destructive effect Effects 0.000 claims description 21
- 239000002893 slag Substances 0.000 claims description 18
- 150000002506 iron compounds Chemical class 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000010304 firing Methods 0.000 claims description 2
- 238000010298 pulverizing process Methods 0.000 claims description 2
- 238000005245 sintering Methods 0.000 claims description 2
- 238000011161 development Methods 0.000 description 11
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 10
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 9
- 235000012255 calcium oxide Nutrition 0.000 description 8
- 239000000292 calcium oxide Substances 0.000 description 8
- 238000006703 hydration reaction Methods 0.000 description 8
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000000843 powder Substances 0.000 description 7
- 239000010440 gypsum Substances 0.000 description 5
- 229910052602 gypsum Inorganic materials 0.000 description 5
- 230000036571 hydration Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000001354 calcination Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000003721 gunpowder Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Landscapes
- Disintegrating Or Milling (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
本発明は生石灰の水和に伴なう膨張力を利用し
た脆性物体の破壊剤の製造方法に関する。
従来コンクリート構造物や岩石を破壊する方法
としては、外部からの機械的衝撃による方法や火
薬等の爆発力を利用した方法が用いられている。
しかしながら、これらの方法は安全性や騒音、粉
じんあるいは振動等の公害、衛生上の問題点があ
り、この問題を解決するものとして膨張性破壊剤
を使用した静的破壊工法が多用されるようになつ
てきた。
この静的破壊工法に用いられる膨張性破壊剤
は、通常酸化カルシウムの水和に伴なう膨張力を
利用したものであつて種々のタイプの破壊剤が提
案されている。
これらの破壊剤の中で酸化鉄を含有する酸化カ
ルシウム焼結体を主成分とする破壊剤が早期に高
い膨張圧を発現するものとして知られている。
しかしながら、該破壊剤は酸化カルシウムの水
和が比較的短時間に起るため、水和熱の大量発生
による余剰水の蒸発が起り、その蒸気圧により被
破壊物体の充填孔から充填物が噴出することがあ
り、また膨張圧の発現が比較的初期に集中して起
るため工事設計がやりにくいという欠点があつ
た。
本発明は、これらの欠点が改良され、膨張圧を
徐々にしかも直線的に発現させることができ、し
かも大きな最終膨張圧が得られる破壊剤に関する
ものである。
本発明の破壊剤は焼成後の段階でFe2O3に換算
して0.1〜25.0wt％の鉄化合物を含有するような
割合で鉄化合物を含む石灰質原料を焼結して得た
焼結体を粉砕した粉砕物100重量部に、ブレーン
比表面積2000〜8000cm2／ｇの粉末度を有する高炉
スラグ５〜50重量部を配合した脆性物体の破壊剤
である。
本発明の破壊剤は、酸化鉄の添加により初期の
水和反応を抑制し大きな膨張圧を得られるように
した酸化カルシウム焼結体を主成分とし、これに
より高炉スラグ粉末を加えてさらに膨張圧の発現
態様を制御するとともに膨張圧の増強を図つたも
のである。酸化カルシウムの水和反応性は反応時
の温度により大きく異なるので、鉄化合物および
高炉スラグの添加量は、破壊剤の使用目的、使用
温度などの使用条件等に合せて要求される破壊剤
の性状により定められる。
本発明の破壊剤においては鉄化合物の含有量が
Fe2O3に換算して0.1wt％未満では初期の水和反
応の抑制効果が小さく充分なハンドリングタイム
と膨張圧を得ることができず、また25.0wt％を超
えると膨張圧の発現がおそくなりすぎ所定時間内
に充分な膨張圧を得ることができなくなる。高炉
スラグ粉末の添加量はスラグ以外の成分100重量
部に対し５〜50重量部、好ましくは５〜30重量部
が適当である。添加量が５重量部未満では効果が
充分でなく、50重量部を超えると充分な膨張圧が
得られなくなる。
また使用するスラグ粉末は細かい方が効果が大
きいが粉砕にエネルギーを要するのでブレーン比
表面積で2000〜8000cm2／ｇが実用的である。ここ
で使用する高炉スラグとしては鉄鋼の高炉から発
生するスラグを水冷した急冷スラグが適してい
る。高炉スラグ粉末の添加は、膨張圧発現の制御
のほか、作業時のスラリーの流動性改良などの作
業制の改善ならびに製造コストの低減にも効果が
ある。
本発明の破壊剤は前記の主成分を混合し、さら
に必要により減水剤、流動化剤等を配合して製品
とする。また破壊剤の自硬性を増加させ、水和反
応に伴なう膨張圧発現と強度発現のタイミングを
調節するため石こうを添加してもよい。石こうの
添加量は、高炉スラグ粉末を添加する前の構成成
分100重量部に対し30重量部以下であり、30重量
部を超えるときは膨張圧の著しい低下等の欠陥を
生ずる。
本発明の破壊剤は膨張圧の発現が緩やかでしか
も直線的に増大するので施工条件の設定が容易で
あり、また成分の調整により任意の速度で膨張圧
を発現させることができる。さらに施工時のスラ
リーの流動性などの作業性が改善されるほか、安
価な原料である高炉スラグが利用できるので製造
コストの低減が可能である。
次に本発明の破壊剤を実施例により具体的に説
明する。
なお実施例中の膨張圧は次の方法により測定し
た。
〔膨張圧の測定方法〕
膨張圧は第１図に示す装置を用いて測定した。
第１図においてＡは内径36mm、厚さ17mm、高さ
150mmの鋼管で側面から圧力変換器Ｂが挿入され
ており、そのヘツドは鋼管の内壁に達している。
破壊剤300ｇを90ｇの水で練つたサンプルを鋼管
に充填し所定温度でその膨張圧を測定する。
実施例 １
石灰石100重量部に所定量の酸化鉄を加えて混
合粉砕し、1300℃で２時間焼成後冷却し、ブレー
ン比表面積2500cm2／ｇの粉末度に粉砕した。この
粉砕品100重量部に石こう１重量部を添加したも
のにブレーン比表面積6000cm2／ｇの高炉スラグ粉
末を10wt％配合して破壊剤を製造した。
これらの製品およひ高炉スラグ無添加の比較品
について膨張圧の発現状況を測定した結果を表−
１および第２図に示す。本発明の破壊剤は膨張圧
がゆるやかに、直線状に近い形で発現し、しかも
12〜24時間後における膨張圧が高く破壊剤として
すぐれた性能を有していることがわかる。
The present invention relates to a method for producing a destructive agent for brittle objects that utilizes the expansion force associated with the hydration of quicklime. Conventional methods for destroying concrete structures and rocks include methods using mechanical impact from the outside and methods using the explosive force of gunpowder or the like.
However, these methods have problems in terms of safety, noise, pollution such as dust or vibration, and hygiene, and as a solution to these problems, static destruction methods using expandable destruction agents are often used. I'm getting old. The expansible destructuring agent used in this static demolition method usually utilizes the expanding force associated with hydration of calcium oxide, and various types of destructuring agents have been proposed. Among these destructive agents, a destructive agent whose main component is a calcium oxide sintered body containing iron oxide is known to quickly develop a high expansion pressure. However, since the hydration of calcium oxide occurs in a relatively short period of time with this destroying agent, excess water evaporates due to the generation of a large amount of heat of hydration, and its vapor pressure causes the filling material to eject from the filling hole of the object to be destroyed. In addition, the development of expansion pressure occurred relatively early and concentrated, making it difficult to design the construction work. The present invention relates to a rupturing agent which has improved these drawbacks, is capable of gradually and linearly developing the inflation pressure, and is capable of obtaining a large final inflation pressure. The destructive agent of the present invention is a sintered body obtained by sintering a calcareous raw material containing an iron compound in a proportion such that the iron compound is contained in an amount of 0.1 to 25.0 wt% in terms of Fe 2 O 3 at a stage after firing. This is an agent for destroying brittle objects, which is made by blending 5 to 50 parts by weight of blast furnace slag having a fineness with a Blaine specific surface area of 2000 to 8000 cm 2 /g to 100 parts by weight of the pulverized material. The destructive agent of the present invention has a calcium oxide sintered body as a main component that suppresses the initial hydration reaction by adding iron oxide and can obtain a large expansion pressure. The aim is to control the expression mode of , as well as to enhance the inflation pressure. The hydration reactivity of calcium oxide varies greatly depending on the temperature during the reaction, so the amount of iron compounds and blast furnace slag added depends on the properties of the destructive agent required according to the purpose of use of the destructive agent, the usage conditions such as the operating temperature, etc. Defined by. In the destructive agent of the present invention, the content of iron compounds is
If it is less than 0.1wt% in terms of Fe 2 O 3 , the effect of suppressing the initial hydration reaction is small and sufficient handling time and expansion pressure cannot be obtained, and if it exceeds 25.0wt%, the development of expansion pressure is slow. If the inflation pressure increases too much, it becomes impossible to obtain sufficient inflation pressure within a predetermined period of time. The appropriate amount of blast furnace slag powder to be added is 5 to 50 parts by weight, preferably 5 to 30 parts by weight, per 100 parts by weight of components other than slag. If the amount added is less than 5 parts by weight, the effect will not be sufficient, and if it exceeds 50 parts by weight, sufficient expansion pressure will not be obtained. Further, the finer the slag powder used, the greater the effect, but since pulverization requires energy, a Blaine specific surface area of 2000 to 8000 cm 2 /g is practical. As the blast furnace slag used here, quenched slag obtained by water-cooling slag generated from a steel blast furnace is suitable. Addition of blast furnace slag powder is effective not only in controlling the development of expansion pressure, but also in improving the working system, such as improving the fluidity of the slurry during work, and in reducing manufacturing costs. The destructuring agent of the present invention is made into a product by mixing the above-mentioned main components and further adding a water reducing agent, a fluidizing agent, etc., if necessary. Furthermore, gypsum may be added to increase the self-hardening property of the destructive agent and to adjust the timing of expansion pressure development and strength development accompanying the hydration reaction. The amount of gypsum added is 30 parts by weight or less per 100 parts by weight of the components before adding the blast furnace slag powder, and if it exceeds 30 parts by weight, defects such as a significant decrease in expansion pressure will occur. Since the destruction agent of the present invention exhibits expansion pressure slowly and increases linearly, it is easy to set the construction conditions, and expansion pressure can be developed at any rate by adjusting the components. Furthermore, workability such as the fluidity of the slurry during construction is improved, and manufacturing costs can be reduced because blast furnace slag, which is an inexpensive raw material, can be used. Next, the destructive agent of the present invention will be specifically explained with reference to Examples. In addition, the expansion pressure in Examples was measured by the following method. [Method for Measuring Expansion Pressure] Expansion pressure was measured using the apparatus shown in FIG.
In Figure 1, A has an inner diameter of 36 mm, a thickness of 17 mm, and a height of
Pressure transducer B is inserted from the side of a 150 mm steel pipe, and its head reaches the inner wall of the steel pipe.
A steel pipe is filled with a sample of 300g of destructive agent kneaded with 90g of water, and its expansion pressure is measured at a predetermined temperature. Example 1 A predetermined amount of iron oxide was added to 100 parts by weight of limestone, mixed and pulverized, fired at 1300° C. for 2 hours, cooled, and pulverized to a powder with a Blaine specific surface area of 2500 cm 2 /g. A destructive agent was prepared by adding 10 wt % of blast furnace slag powder having a Blaine specific surface area of 6000 cm 2 /g to 100 wt % of this pulverized product and adding 1 part by weight of gypsum. The table below shows the results of measuring the development of expansion pressure for these products and a comparative product without the addition of blast furnace slag.
1 and 2. The destructive agent of the present invention exhibits expansion pressure slowly and in a nearly linear manner, and
It can be seen that the expansion pressure after 12 to 24 hours is high, indicating that it has excellent performance as a destructive agent.
【表】
※ ハンドリングタイム…破壊剤に注入してから膨張
圧を発現しだすまでの時間
実施例 ２
石灰石に酸化鉄を添加し1300℃で２時間焼成し
て得た酸化鉄2.0wt％を含有する酸化カルシウム
焼結体をブレーン比表面積2500cm2／ｇの粉末度に
粉砕したものに石こう1.0wt％および所定粉末度
に粉砕した高炉スラグ10wt％を配合して破壊剤
を製造した。これらの製品について膨張圧の発現
状況を測定した結果を表−２に示す。[Table] *Handling time...Time from injecting into the destructive agent until it starts to develop expansion pressure Example 2 Contains 2.0wt% iron oxide obtained by adding iron oxide to limestone and calcining it at 1300℃ for 2 hours. A destructive agent was prepared by blending 1.0 wt% of gypsum and 10 wt% of blast furnace slag ground to a predetermined fineness to a calcium oxide sintered body pulverized to a fineness with a Blaine specific surface area of 2500 cm 2 /g. Table 2 shows the results of measuring the development of inflation pressure for these products.
【表】
実施例 ３
実施例２と同じ酸化カルシウム焼結体と石こう
の混合物にブレーン比表面積6000cm2／ｇに粉砕し
た高炉スラグ粉末を所定量配合して破壊剤を製造
し、これらの製品および高炉スラグ無添加の比較
品について膨張圧の発現状況を測定した結果を表
−３に示す。[Table] Example 3 A destructive agent was manufactured by blending a predetermined amount of blast furnace slag powder crushed to a Blaine specific surface area of 6000 cm 2 /g into the same mixture of calcium oxide sinter and gypsum as in Example 2, and these products and Table 3 shows the results of measuring the development of expansion pressure for comparative products without the addition of blast furnace slag.
第１図は本発明の破壊剤の膨張圧を測定する膨
張圧測定器の斜視図である。第１図においてＡは
測定容器、Ｂは圧力変換器を表す。第２図は実施
例１の破壊剤の膨張圧発現状況を示すグラフであ
る。第２図において実線は本発明の破壊剤、点線
はスラグ無添加の比較品についての膨張圧発現状
況を示す。
FIG. 1 is a perspective view of an expansion pressure measuring device for measuring the expansion pressure of the destructive agent of the present invention. In FIG. 1, A represents a measurement container and B represents a pressure transducer. FIG. 2 is a graph showing the state of expansion pressure development of the destructive agent of Example 1. In FIG. 2, the solid line shows the expansion pressure development of the destructive agent of the present invention, and the dotted line shows the expansion pressure development of the comparative product without slag added.
Claims (1)
％以下の鉄化合物を含有するような割合で鉄化合
物を含む石灰質原料を焼結して得た焼結体を粉砕
した粉砕物100重量部に、ブレーン比表面積2000
〜8000cm2／ｇの粉末度を有する高炉スラグ５〜50
重量部を配合したことを特徴とする脆性物体の破
壊剤。1 0.1 to 25.0wt in terms of Fe 2 O 3 at the stage after firing
To 100 parts by weight of a pulverized material obtained by pulverizing a sintered body obtained by sintering a calcareous raw material containing iron compounds in a proportion such that the content of iron compounds is 2000% or less, Blaine specific surface area 2000
Blast furnace slag 5-50 with a fineness of ~8000cm 2 /g
A destructive agent for brittle objects characterized by containing parts by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58139359A JPS6032879A (en) | 1983-08-01 | 1983-08-01 | Breaking agent incorporated with blast furnace slag for brittle matter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58139359A JPS6032879A (en) | 1983-08-01 | 1983-08-01 | Breaking agent incorporated with blast furnace slag for brittle matter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6032879A JPS6032879A (en) | 1985-02-20 |
| JPH0460149B2 true JPH0460149B2 (en) | 1992-09-25 |
Family
ID=15243488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58139359A Granted JPS6032879A (en) | 1983-08-01 | 1983-08-01 | Breaking agent incorporated with blast furnace slag for brittle matter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6032879A (en) |
-
1983
- 1983-08-01 JP JP58139359A patent/JPS6032879A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6032879A (en) | 1985-02-20 |
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