JPH0799228B2 - Fume tube and its manufacturing method - Google Patents
Fume tube and its manufacturing methodInfo
- Publication number
- JPH0799228B2 JPH0799228B2 JP62236679A JP23667987A JPH0799228B2 JP H0799228 B2 JPH0799228 B2 JP H0799228B2 JP 62236679 A JP62236679 A JP 62236679A JP 23667987 A JP23667987 A JP 23667987A JP H0799228 B2 JPH0799228 B2 JP H0799228B2
- Authority
- JP
- Japan
- Prior art keywords
- fume tube
- peripheral surface
- inner peripheral
- hollow ceramic
- manufacturing
- 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
- Rigid Pipes And Flexible Pipes (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Description
【発明の詳細な説明】 （技術分野） この発明は、ヒューム管とその製造方法に関するもので
ある。さらに詳しくは、この発明は、高強度で、耐摩耗
性に優れた中空セラミックス骨材を用いた、内周面の劣
化抑制効果に優れたヒューム管とその製造方法に関する
ものである。TECHNICAL FIELD The present invention relates to a fume tube and a method for manufacturing the same. More specifically, the present invention relates to a fume tube using a hollow ceramic aggregate having high strength and excellent wear resistance and having an excellent effect of suppressing deterioration of the inner peripheral surface, and a method for producing the same.
（背景技術） 従来、コンクリートの遠心成型体からなるヒューム管が
知られている。これらのヒューム管は、その製造方法、
構造、および使用状態の特殊性から、製造工程および保
存時、さらには使用時に劣化しやすいという問題があっ
た。(Background Art) Conventionally, a fume tube made of a centrifugally molded concrete is known. These fume tubes are manufactured by
Due to the peculiarity of the structure and the usage state, there is a problem that the deterioration is likely to occur during the manufacturing process, storage, and during use.
たとえば、第２図に示したように、ヒューム管は遠心力
によって締め固めするために、ヒューム管（ア）の外周
面（イ）の近傍では組織構造が密になるものの、逆に内
周面（ウ）に近い部分では組織構造が疎になりやすい。
このため、内周面（ウ）の近傍においてはその組織にク
ラック（エ）が発生しやすいという欠点があった。For example, as shown in FIG. 2, since the fume tube is compacted by centrifugal force, the tissue structure becomes dense near the outer peripheral surface (a) of the fume tube (a), but conversely the inner peripheral surface. The tissue structure tends to become sparse in the part close to (c).
For this reason, there has been a drawback that cracks (D) are likely to occur in the structure in the vicinity of the inner peripheral surface (C).
このことは、遠心成型によって、ヒューム管（ア）の組
織構造において比重の大きい粗骨材（オ）が外周面
（イ）近傍に集まり、内周面（ウ）近傍にはモルタル分
が多くなるためクラック（エ）が発生しやすいことによ
る。強度的に内周面（ウ）近傍が弱いばかりでなく、モ
ルタル分が多いことにより、硫化水素等の酸成分によっ
てエロージョンされやすい。This is because centrifugal aggregate causes coarse aggregates (e) having a large specific gravity in the tissue structure of the fume tube (a) to gather near the outer peripheral surface (a), and the mortar content increases near the inner peripheral surface (c). Therefore, cracks (d) are likely to occur. In addition to being weak in the vicinity of the inner peripheral surface (c) in terms of strength, it is likely to be eroded by an acid component such as hydrogen sulfide due to the large amount of mortar.
ヒューム管は、下水道管等として常時水に接している場
合が多いため、このような劣化は急速に進行し、使用不
能となる。In many cases, the fume pipe is constantly in contact with water as a sewer pipe or the like, and thus such deterioration progresses rapidly and becomes unusable.
従来は、このようなヒューム管の欠点を補うために、内
周面（ウ）にモルタルによって修復措置するか、あるい
は内周面（ウ）に樹脂コーティングして、劣化を抑える
ことなどが行われていた。Conventionally, in order to make up for such defects of the fume tube, the inner peripheral surface (c) is repaired with mortar, or the inner peripheral surface (c) is coated with a resin to suppress deterioration. Was there.
しかしながら、モルタルによる効果はあまり期待でき
ず、また樹脂コーティングは、耐久性および製造コスト
の面で問題が多いのが実情である。However, the effect of mortar cannot be expected so much, and in reality, resin coating has many problems in terms of durability and manufacturing cost.
このため、従来の方法に代わる新しい劣化抑制効果に優
れ、しかも低コストなヒューム管の実現が強く望まれて
いた。Therefore, it has been strongly desired to realize a new fume tube which is superior to the conventional method in suppressing deterioration and which is low in cost.
（発明の目的） この発明は、以上の通りの事情を踏まえてなされたもの
であり、従来のヒューム管の欠点を改善し、強度が大き
く、劣化抑制効果に優れ、しかも製造コストの安い新し
い構造のヒューム管とその製造方法を提供することを目
的としている。(Object of the Invention) The present invention has been made in view of the above circumstances, and has a new structure that improves the defects of the conventional fume tube, has a large strength, is excellent in the deterioration suppressing effect, and is inexpensive in manufacturing cost. It is intended to provide a fume tube and a manufacturing method thereof.
（発明の開示） この発明は、上記の目的を実現するために、内周面近傍
に中空セラミックス骨材層を形成してなることを特徴と
するヒューム管を提供するものである。DISCLOSURE OF THE INVENTION The present invention provides a fume tube characterized in that a hollow ceramic aggregate layer is formed in the vicinity of an inner peripheral surface in order to achieve the above object.
またこの発明は、このヒューム管を製造するために、中
空セラミックス骨材を用いて遠心成型し、内周面近傍に
中空セラミックス骨材層を形成することを特徴としてい
る。Further, the present invention is characterized in that, in order to manufacture the fume tube, the hollow ceramic aggregate is centrifugally molded to form a hollow ceramic aggregate layer in the vicinity of the inner peripheral surface.
添付した図面に沿って説明すると、第１図に示したよう
に、この発明のヒューム管は、ヒューム管（１）の内周
面近傍に、中空セラミックス骨材（２）を配した組織構
造からなっている。ヒューム管（１）について、遠心成
型で製造する場合には、比較的比重の大きな粗骨材
（３）は、外周面（４）近傍に集まり、内周面（５）の
近傍には、モルタル分が多くなるが、この発明において
は、このモルタル分の多い内周面（５）の近傍に中空セ
ラミックス骨材（２）を配している。Referring to the accompanying drawings, as shown in FIG. 1, the fume tube of the present invention has a structure in which a hollow ceramic aggregate (2) is arranged in the vicinity of the inner peripheral surface of the fume tube (1). Has become. When the fume tube (1) is manufactured by centrifugal molding, the coarse aggregate (3) having a relatively large specific gravity gathers near the outer peripheral surface (4) and the mortar near the inner peripheral surface (5). However, in the present invention, the hollow ceramic aggregate (2) is arranged in the vicinity of the inner peripheral surface (5) having a large amount of mortar.
この中空セラミックス骨材（２）は、単位体積重量が小
さく、モルタル層に浮いた構造で、ヒューム管（１）の
内周面（５）近傍に集まる。中空セラミックス骨材
（２）は、セラミックスであるが故に、その強度は大き
く、また耐摩耗性、耐酸性にも優れたものとすることが
できる。The hollow ceramic aggregate (2) has a small unit volume weight and has a structure floating in the mortar layer, and collects in the vicinity of the inner peripheral surface (5) of the fume tube (1). Since the hollow ceramic aggregate (2) is made of ceramics, it can be made to have high strength and excellent abrasion resistance and acid resistance.
この中空セラミックス骨材（２）は、たとえば、比重
が、表乾時に1.35、絶乾時に1.32程度で、吸水率2.4％
の、約１〜3mm径のアルミナが例示される。あるいはさ
らにまた、これ以上の粒径のものが適宜に用いられる。
吸水率は、たとえば従来の軽量骨材であるビルトンの3
1.0％（造粒）、14.7％（非造粒）に比べてもはるかに
小さく、安定した組織構造を形成するのに好ましいもの
である。耐久性は著しく向上する。This hollow ceramic aggregate (2) has, for example, a specific gravity of 1.35 at the time of surface drying and about 1.32 at the time of absolute drying, and a water absorption rate of 2.4%.
Alumina having a diameter of about 1 to 3 mm is exemplified. Alternatively, a particle having a particle size larger than this is appropriately used.
The water absorption is, for example, 3% of that of Bilton, which is a conventional lightweight aggregate.
It is much smaller than 1.0% (granulated) and 14.7% (non-granulated), which is preferable for forming a stable microstructure. The durability is significantly improved.
強度についてみると、コンクリート体としては、圧縮強
度は、475kg/cm2、310kg/cm2（比強度）で、ビルトンの
場合の371kg/cm2、239kg/cm2（比強度）よりも、約30％
も大きい。また、曲げ強度は、70kg/cm2、で、ビルトン
を用いた場合の59kg/cm2よりも、約20％も高い。As for the strength, the concrete body, compressive strength, at 475kg / cm 2, 310kg / cm 2 ( specific strength), 371kg / cm 2 in the case of Biruton than 239 kg / cm 2 (specific strength), about 30%
Is also big. Also, the bending strength is 70 kg / cm 2 , which is about 20% higher than 59 kg / cm 2 when Bilton is used.
粒径が平均1.5〜1.7mmの中空セラミックス骨材は、たと
えば、コンクリートの調合としては、次のような割合
が、また、その特性も、次のように例示される。The hollow ceramic aggregate having an average particle diameter of 1.5 to 1.7 mm is, for example, as a concrete mix, the following proportions and its characteristics are exemplified as follows.
（Ａ）調合 W/C（％） 40 単位水量（kg/m3） 204 セメント（kg/m3） 500 中空骨材（kg/m3） 857 （Ｂ）特性 比重（気乾時、４週間） 1.53 圧縮強度（kg/cm2） 475 曲げ強度（kg/cm2） 70 乾燥収縮率（×10-4） 1.36 遠心成型において、この中空骨材（２）は、ヒューム管
製造のための原料としてあらかじめ混合しておいてもよ
いし、あるいはまた、成型の途中段階で加えるようにし
てもよい。ヒューム管（１）の全重量および全体積に対
する中空セラミックス骨材（２）の占める割合は、各
々、数％〜数10％の範囲で、ヒューム管の使用場所等に
応じて適宜に選択することができる。(A) Formulation W / C (%) 40 Unit water amount (kg / m 3 ) 204 Cement (kg / m 3 ) 500 Hollow aggregate (kg / m 3 ) 857 (B) Characteristics Specific gravity (4 weeks when air-dried) ) 1.53 Compressive strength (kg / cm 2 ) 475 Bending strength (kg / cm 2 ) 70 Dry shrinkage ratio (× 10 -4 ) 1.36 In centrifugal molding, this hollow aggregate (2) is a raw material for manufacturing fume tubes. May be mixed in advance, or may be added in the middle of molding. The proportion of the hollow ceramic aggregate (2) to the total weight and the total volume of the fume tube (1) is in the range of several% to several tens%, and should be appropriately selected according to the place of use of the fume tube. You can
内周面（５）近傍には、以上の通りの中空セラミックス
骨材（２）層が形成されるため、組織構造は密になり、
内周面（５）での衝撃、水分、酸性分等に対しての耐性
は大きく向上する。Since the hollow ceramic aggregate (2) layer as described above is formed near the inner peripheral surface (5), the tissue structure becomes dense,
The resistance of the inner peripheral surface (5) to impact, moisture, acid content, etc. is greatly improved.
（発明の効果） この発明により、以上の通りの強度、劣化抑制効果に優
れ、しかも従来の樹脂コーティングヒューム管に比べて
はるかに低コストなヒューム管が実現される。(Effects of the Invention) According to the present invention, a fume tube which is excellent in strength and deterioration suppressing effect as described above and which is much lower in cost than the conventional resin-coated fume tube is realized.
第１図は、この発明の一例を示した断面図である。ま
た、第２図は、従来例を示した断面図である。 １……ヒューム管、２……中空骨材、 ３……粗骨材、４……外周面、 ５……内周面。FIG. 1 is a sectional view showing an example of the present invention. FIG. 2 is a sectional view showing a conventional example. 1 ... Hume tube, 2 ... Hollow aggregate, 3 ... Coarse aggregate, 4 ... Outer peripheral surface, 5 ... Inner peripheral surface.
Claims (2)
成してなることを特徴とするヒューム管。1. A fume tube characterized in that a hollow ceramic aggregate layer is formed near the inner peripheral surface.
し、内周面近傍に中空セラミックス骨材層を形成するこ
とを特徴とするヒューム管の製造方法。2. A method for manufacturing a fume tube, which comprises centrifugally molding a hollow ceramic aggregate to form a hollow ceramic aggregate layer in the vicinity of the inner peripheral surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62236679A JPH0799228B2 (en) | 1987-09-21 | 1987-09-21 | Fume tube and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62236679A JPH0799228B2 (en) | 1987-09-21 | 1987-09-21 | Fume tube and its manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6479490A JPS6479490A (en) | 1989-03-24 |
| JPH0799228B2 true JPH0799228B2 (en) | 1995-10-25 |
Family
ID=17004174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62236679A Expired - Lifetime JPH0799228B2 (en) | 1987-09-21 | 1987-09-21 | Fume tube and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0799228B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5950505B2 (en) * | 1976-07-27 | 1984-12-08 | 第一化成株式会社 | Plastic molded products and their molding methods |
| JPS61188110A (en) * | 1985-02-14 | 1986-08-21 | 麻生セメント株式会社 | Corrosion-resistant pipe and manufacture thereof |
-
1987
- 1987-09-21 JP JP62236679A patent/JPH0799228B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6479490A (en) | 1989-03-24 |
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