JP3111742B2 - Manufacturing method of permeable pavement material - Google Patents
Manufacturing method of permeable pavement materialInfo
- Publication number
- JP3111742B2 JP3111742B2 JP05095775A JP9577593A JP3111742B2 JP 3111742 B2 JP3111742 B2 JP 3111742B2 JP 05095775 A JP05095775 A JP 05095775A JP 9577593 A JP9577593 A JP 9577593A JP 3111742 B2 JP3111742 B2 JP 3111742B2
- Authority
- JP
- Japan
- Prior art keywords
- incineration ash
- sludge incineration
- composite particles
- sewage sludge
- hard aggregate
- 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 - Fee Related
Links
- 239000000463 material Substances 0.000 title claims description 17
- 238000004519 manufacturing process Methods 0.000 title description 9
- 239000011246 composite particle Substances 0.000 claims description 42
- 239000010802 sludge Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 14
- 239000010801 sewage sludge Substances 0.000 description 44
- 238000000465 moulding Methods 0.000 description 10
- 238000010304 firing Methods 0.000 description 8
- 230000035699 permeability Effects 0.000 description 8
- 230000002093 peripheral effect Effects 0.000 description 7
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 6
- 235000011941 Tilia x europaea Nutrition 0.000 description 6
- 239000004571 lime Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000010865 sewage Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 4
- 239000000701 coagulant Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000008394 flocculating agent Substances 0.000 description 4
- 238000005469 granulation Methods 0.000 description 4
- 230000003179 granulation Effects 0.000 description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 description 3
- 239000004927 clay Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000011361 granulated particle Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003826 uniaxial pressing Methods 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
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Landscapes
- Glanulating (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は透水性舗装材の製造方法
に係り、特に、汚泥焼却灰を原料として透水性舗装材を
製造する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a permeable pavement, and more particularly to a method for producing a permeable pavement using sludge incineration ash as a raw material.
【０００２】[0002]
【従来の技術】近年、下水処理場から発生する下水汚泥
は増加傾向にあり、今後の下水道普及率の向上や下水処
理技術の高度化を考慮すると、下水汚泥発生量は増々増
加するものと予測される。2. Description of the Related Art In recent years, the amount of sewage sludge generated from sewage treatment plants has been increasing, and it is expected that the amount of sewage sludge generated will increase further in consideration of the increase in the sewerage penetration rate and the sophistication of sewage treatment technology. Is done.
【０００３】従来、下水汚泥の処分方法としては、埋立
が最も多いが、今後の下水汚泥発生量の増加の面から、
有効利用を図ることが強く望まれており、その利用方法
の開発が様々な分野で進められている。Conventionally, landfill is the most common method of disposal of sewage sludge, but from the viewpoint of increasing the amount of sewage sludge generated in the future,
There is a strong demand for effective use, and methods of using the same are being developed in various fields.
【０００４】この下水汚泥の有効利用の実用化の面で
は、建設資材としての利用が注目を集めており、例えば
下水汚泥焼却灰に可塑性粘土を混合し、成形、焼成して
舗装材を製造する方法が提案されている。In terms of practical use of this effective use of sewage sludge, its use as a construction material has attracted attention. For example, pavement material is manufactured by mixing plastic clay with sewage sludge incineration ash, molding and firing. A method has been proposed.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、従来考
えられている下水汚泥焼却灰を用いた透水舗装材の製造
方法では、下水汚泥焼却灰使用量が原料中の５０重量％
以下と少なく、下水汚泥焼却灰を大量処理できないとい
う欠点がある。However, in the method of manufacturing a permeable pavement material using sewage sludge incineration ash which has been conventionally considered, the amount of sewage sludge incineration ash used is 50% by weight of the raw material.
There is a disadvantage that sewage sludge incineration ash cannot be processed in large quantities.
【０００６】本発明は上記従来の問題点を解決し、下水
汚泥焼却灰を大量に使用して透水性舗装材を製造するこ
とができる透水性舗装材の製造方法を提供することを目
的とする。An object of the present invention is to solve the above-mentioned conventional problems and to provide a method for producing a water-permeable pavement capable of manufacturing a water-permeable pavement using a large amount of sewage sludge incineration ash. .
【０００７】[0007]
【課題を解決するための手段】本発明の透水性舗装材の
製造方法は、粒径０．５〜５ｍｍの硬質骨材、汚泥焼却
灰及び水を高速回転羽根形造粒機に供給し、該硬質骨材
の外周囲に汚泥焼却灰が層厚比３０％以上で緻密に付着
した複合粒子であって、硬質骨材１００重量部に対する
汚泥焼却灰の付着量が１００重量部以上の複合粒子を造
粒し、この造粒された複合粒子を、複合粒子間に間隙が
残留するようにプレスして舗装材形状の成形体とし、そ
の後、この成形体を焼成することを特徴とする。The method for producing a permeable pavement material of the present invention comprises the steps of: supplying a hard aggregate having a particle size of 0.5 to 5 mm, incineration ash of sludge, and water to a high-speed rotary impeller granulator; A composite particle in which sludge incineration ash is densely attached to the outer periphery of the hard aggregate at a layer thickness ratio of 30% or more, based on 100 parts by weight of the hard aggregate.
The composite particles having a sludge incineration ash adhesion amount of 100 parts by weight or more are granulated, and the granulated composite particles are pressed so that a gap remains between the composite particles to form a pavement-shaped molded body. The method is characterized in that the molded body is fired.
【０００８】なお、本発明において、層厚比とは、硬質
骨材の半径に対する付着層肉厚の百分率を指す。[0008] In the present invention, the layer thickness ratio refers to the percentage of the thickness of the adhered layer to the radius of the hard aggregate.
【０００９】以下に本発明を詳細に説明する。なお、汚
泥焼却灰として下水汚泥焼却灰を例示して説明する。Hereinafter, the present invention will be described in detail. In addition, sewage sludge incineration ash is illustrated and described as sludge incineration ash.
【００１０】本発明の方法においては、まず、粒径０．
５〜５ｍｍの硬質骨材、下水汚泥焼却灰及び水を高速回
転羽根形造粒機に供給して複合粒子を造粒する。[0010] In the method of the present invention, first, the particle size is 0.1.
A hard aggregate of 5 to 5 mm, sewage sludge incineration ash, and water are supplied to a high-speed rotating blade-type granulator to granulate composite particles.
【００１１】この複合粒子の造粒に当たり、硬質骨材の
粒径が０．５ｍｍ未満であると大径の複合粒子を造粒す
ることが難しい。複合粒子の粒径が小さいと、プレス成
形体の空隙率が低くなると共に、この空隙も焼成工程で
閉塞され易い。硬質骨材の粒径が５ｍｍを超えると下水
汚泥焼却灰を大量に付着させることが難しくなる。この
ため、硬質骨材の粒径は０．５〜５ｍｍ、好ましくは１
〜３ｍｍとする。このような硬質骨材としては、石材や
陶磁器の粉砕物、或いは、天然の細骨材、例えば珪砂等
を用いることができる。In the granulation of the composite particles, if the particle size of the hard aggregate is less than 0.5 mm, it is difficult to granulate large-diameter composite particles. When the particle size of the composite particles is small, the porosity of the press-formed body is reduced, and the cavities are also easily closed in the firing step. When the particle size of the hard aggregate exceeds 5 mm, it becomes difficult to attach a large amount of sewage sludge incineration ash. Therefore, the particle size of the hard aggregate is 0.5 to 5 mm, preferably 1 to 5 mm.
３3 mm. As such a hard aggregate, a crushed stone or a porcelain, or a natural fine aggregate such as silica sand can be used.
【００１２】一方、下水汚泥焼却灰はその焼却炉型式に
もよるが、通常平均粒径は、流動焼却炉で１０〜１００
μｍ、多段焼却炉で５０〜８００μｍの微細粉末である
が、本発明において、下水汚泥焼却灰としては各種下水
処理場から排出されるものであれば良く、また、その下
水処理場で使用される凝集剤等により特に制限されるこ
とはない。即ち、下水処理場で使用される凝集剤は、主
に高分子系凝集剤と石灰系凝集剤とに分類され、このう
ち、石灰系凝集剤を用いた下水汚泥焼却灰では、含有さ
れる石灰成分量にバラツキが大きい。このため、従来に
おいて、石灰系凝集剤を用いた下水汚泥焼却灰を原料と
して建材を品質のばらつきなく製造することはできず、
原料としては高分子系凝集剤を用いた下水汚泥焼却灰に
限られていたが、本発明によれば、高分子系、石灰系の
いずれの凝集剤を用いた下水汚泥焼却灰であっても使用
可能である。On the other hand, sewage sludge incineration ash usually has an average particle size of 10 to 100 in a fluidized incinerator, depending on the type of the incinerator.
μm, a fine powder of 50 to 800 μm in a multi-stage incinerator. In the present invention, the sewage sludge incineration ash may be any as long as it is discharged from various sewage treatment plants, and is used in the sewage treatment plant. There is no particular limitation on the coagulant or the like. That is, flocculants used in sewage treatment plants are mainly classified into polymeric flocculants and lime flocculants. Among them, sewage sludge incineration ash using lime flocculants includes lime contained. Variation in component amount is large. For this reason, conventionally, building materials cannot be manufactured without variation in quality using sewage sludge incineration ash using a lime-based coagulant as a raw material,
Although the raw material was limited to sewage sludge incineration ash using a polymer-based flocculant, according to the present invention, even if the sewage sludge incineration ash using any of the polymer-based or lime-based coagulant Can be used.
【００１３】本発明においては、硬質骨材、下水汚泥焼
却灰及び水を用いて造粒して、硬質骨材の外周囲に下水
汚泥焼却灰が緻密かつ厚肉に、即ち、層厚比３０％以上
となるように付着した複合粒子であって、硬質骨材１０
０重量部に対する汚泥焼却灰の付着量が１００重量部以
上の複合粒子を製造する。In the present invention, the hard aggregate, sewage sludge incineration ash and water are granulated, and the sewage sludge incineration ash is dense and thick around the hard aggregate, that is, the layer thickness ratio is 30. % Of the composite particles attached to the hard aggregate 10 % or more.
The amount of sludge incineration ash attached to 0 parts by weight is 100 parts by weight or less
The above composite particles are produced.
【００１４】本発明は、硬質骨材の周囲に下水汚泥焼却
灰を厚く且つ緻密に付着させるのが特徴であり、このよ
うに分厚く下水汚泥焼却灰を硬質骨材に付着させること
により、大量の下水汚泥焼却灰を処分することが可能と
なる。また、下水汚泥焼却灰を緻密に付着させることに
より、後のプレス工程において造粒粒子が潰れることが
防止される。The present invention is characterized in that sewage sludge incineration ash is thickly and densely adhered around the hard aggregate. In this way, by attaching the sewage sludge incineration ash to the hard aggregate in a large amount, a large amount of ash is attached. Sewage sludge incineration ash can be disposed of. Further, by making the sewage sludge incineration ash adhere densely, it is possible to prevent the granulated particles from being crushed in the subsequent pressing step.
【００１５】本発明では、硬質骨材１００重量部に対し
下水汚泥焼却灰を１５０重量部以上、特に２００重量部
以上を付着させるのが好ましい。In the present invention, it is preferable that sewage sludge incineration ash adhere to 150 parts by weight or more , particularly 200 parts by weight or more , based on 100 parts by weight of hard aggregate.
【００１６】この大量の下水汚泥焼却灰を緻密に付着さ
せるために、アイリッヒミキサー、ロッキングミキサー
等の高速回転羽根形造粒機を用いる。この高速回転羽根
形造粒機中に、硬質骨材、下水汚泥焼却灰及び水を供給
して羽根を高速回転させることにより、硬質骨材の周囲
に下水汚泥焼却灰が分厚くしかも緻密に付着する。この
際、羽根を高速回転させることが肝要であり、アイリッ
ヒミキサーであれば周速１０ｍ／Ｓ、とりわけ周速１５
ｍ／Ｓ以上、ロッキングミキサーであれば周速１０ｍ／
Ｓ、とりわけ周速１３ｍ／Ｓ以上で羽根を回転させる。
なお、羽根を過度に高速回転させると、適正な造粒が難
しくなるので、アイリッヒミキサーでは周速３０ｍ／Ｓ
以下、ロッキングミキサーでは周速２５ｍ／Ｓ以下とす
るのが好ましい。In order to adhere this large amount of sewage sludge incineration ash densely, a high-speed rotating blade-type granulator such as an Erich mixer or a rocking mixer is used. By supplying the hard aggregate, sewage sludge incineration ash and water into the high-speed rotating blade-type granulator, the blades are rotated at high speed, whereby the sewage sludge incineration ash adheres thickly and densely around the hard aggregate. . At this time, it is important to rotate the blades at a high speed. In the case of an Erich mixer, the peripheral speed is 10 m / S, especially the peripheral speed is 15 m / S.
m / S or more, peripheral speed 10m /
S, especially the blade is rotated at a peripheral speed of 13 m / S or more.
In addition, if the blades are rotated at an excessively high speed, it becomes difficult to perform proper granulation. Therefore, the peripheral speed of the Erich mixer is 30 m / S.
Hereinafter, it is preferable that the peripheral speed of the rocking mixer is 25 m / S or less.
【００１７】このような条件下で造粒することにより、
硬質骨材の周囲に分厚く緻密な下水汚泥焼却灰付着層を
有した複合粒子を造粒できる。付着層の肉厚は、硬質骨
材の半径の３０％以上、とりわけ４０％以上とする。下
水汚泥焼却灰の付着層の緻密さは、得られる複合粒子の
圧潰強度が２ｋｇｆ／ｃｍ2 以上とりわけ８ｋｇｆ／ｃ
ｍ2 以上となるようにするのが好ましい。By granulating under such conditions,
Composite particles having a thick and dense sewage sludge incineration ash adhesion layer around the hard aggregate can be granulated. The thickness of the adhesion layer is 30% or more, especially 40% or more of the radius of the hard aggregate. The denseness of the adhering layer of sewage sludge incineration ash indicates that the crushing strength of the obtained composite particles is 2 kgf / cm 2 or more, especially 8 kgf / c.
It is preferably set to be not less than m 2 .
【００１８】なお、この複合粒子の造粒に当たり使用す
る水の量は特に制限はないが、通常の場合、下水汚泥焼
却灰に対して１０〜５０重量％程度とされる。また、こ
の造粒においては、必要に応じて粘土、ポリビニルアル
コール（ＰＶＡ）、カルボキシメチルセルロース（ＣＭ
Ｃ）等のバインダーを使用することができ、バインダー
の使用により一層高強度の複合粒子を得ることが可能と
なる。この場合、バインダー使用量は下水汚泥焼却灰に
対して１〜１０重量％程度とするのが好ましい。The amount of water used for granulating the composite particles is not particularly limited, but is usually about 10 to 50% by weight based on the sewage sludge incineration ash. In this granulation, clay, polyvinyl alcohol (PVA), carboxymethylcellulose (CM
A binder such as C) can be used, and the use of the binder makes it possible to obtain composite particles having higher strength. In this case, the amount of the binder used is preferably about 1 to 10% by weight based on the sewage sludge incineration ash.
【００１９】得られた複合粒子は、次いで、粒子間に間
隙が残留するようにプレス（好ましくは一軸プレス）し
て舗装材形状の成形体とする。プレス圧の程度は、複合
粒子の強度、所望とする透水性の程度等により適宜決定
されるが、通常の場合、２０〜１００ｋｇｆ／ｃｍ2 程
度の範囲内とされる。The obtained composite particles are then pressed (preferably uniaxial pressing) so that gaps remain between the particles to form a pavement-shaped formed body. The degree of the pressing pressure is appropriately determined depending on the strength of the composite particles, the desired degree of water permeability, and the like, but is usually in the range of about 20 to 100 kgf / cm 2 .
【００２０】このプレス成形に際しては、前述の通り、
複合粒子が圧潰されることはない。プレス成形により、
複合粒子相互が付着し、舗装材形状となる。このプレス
成形体においては、複合粒子間に連続した空隙が残存す
る。後の焼成工程においても、この空隙が熔融物で閉塞
されることはなく、連続気孔が形成される。In this press molding, as described above,
The composite particles are not crushed. By press molding,
The composite particles adhere to each other to form a pavement material. In this press-formed body, continuous voids remain between the composite particles. Even in the subsequent firing step, the voids are not closed by the melt, and continuous pores are formed.
【００２１】本発明では、複合粒子の下水汚泥焼却灰層
が緻密であるため、プレス成形圧を比較的高くとること
ができる。このため、プレス成形体の粒子構造を観察す
ると、複合粒子相互が良く点接着していることが認めら
れた。即ち、複合粒子同志の接触面積が大きい。そのた
め、プレス成形体の成形強度が高い。また、焼成工程に
おいては、比較的低目の焼成温度で焼成するだけで、下
水汚泥焼却灰が十分に焼結され、しかも複合粒子同志を
十分に熔着させることができる。In the present invention, since the sewage sludge incineration ash layer of the composite particles is dense, the press molding pressure can be set relatively high. For this reason, when observing the particle structure of the press-formed body, it was confirmed that the composite particles were well point-adhered to each other. That is, the contact area between the composite particles is large. Therefore, the molding strength of the press molded body is high. In addition, in the firing step, only by firing at a relatively low firing temperature, the sewage sludge incineration ash can be sufficiently sintered and the composite particles can be sufficiently welded.
【００２２】このようにプレス成形体の焼結性が良いと
ころから、下水汚泥焼却灰が石灰分を多量に含んでいて
も、寸法精度良く十分に焼結され、しかも空隙が多量に
残存した多孔質体を焼き上げることができる。Because of the good sinterability of the press-formed body, even if the sewage sludge incineration ash contains a large amount of lime, it is sufficiently sintered with high dimensional accuracy and has a large amount of voids. The body can be baked.
【００２３】なお、焼成は、ローラーハースキルン、ト
ンネルキルン等により１０００〜１２００℃で行なうの
が好ましい。焼成時間は１２０ｍｉｎ以上が好ましい。The firing is preferably carried out at 1000 to 1200 ° C. using a roller hearth kiln, a tunnel kiln or the like. The firing time is preferably 120 minutes or more.
【００２４】このようにして得られる透水性舗装材は、
通常の場合２０ｋｇｆ／ｃｍ2 以上の強度を有し、かつ
１０-2ｃｍ／Ｓ以上の透水性（ＪＩＳ Ａ １２１８で
測定した値）を有するものであり、舗装材として好適に
使用することができる。The water-permeable pavement material thus obtained is
Usually, it has a strength of 20 kgf / cm 2 or more and a water permeability of 10 −2 cm / S or more (value measured according to JIS A 1218), and can be suitably used as a pavement material. .
【００２５】[0025]
【作用】硬質骨材の外周囲に汚泥焼却灰を緻密かつ厚肉
に付着させた複合粒子を用いて成形、焼成することによ
り、汚泥焼却灰を大量に原料とした透水性舗装材を製造
することが可能とされる。[Function] By forming and baking using composite particles in which sludge incineration ash is attached densely and thickly to the outer periphery of the hard aggregate, a permeable pavement material is produced from sludge incineration ash in large quantities. It is made possible.
【００２６】即ち、複合粒子は硬質骨材を核として用い
ることから、高硬度で寸法安定性が良く、汚泥焼却灰を
肉厚に付着させたものであるため、汚泥焼却灰を大量に
使用することができる。しかも、汚泥焼却灰を緻密に付
着させることから、複合粒子の強度が比較的高いものと
なり、あらゆる種類の汚泥焼却灰を用いて、複合粒子間
の間隙が残留するように容易にプレス成形することがで
きる。また、使用する汚泥焼却灰以外の原料としては、
硬質骨材のみで良く、コストの低廉化が図れる。その
上、このプレス成形に当り、振動プレス成形機等の特別
な成形機を用いる必要もなく、一軸加圧成形により容易
に成形することができる。That is, since the composite particles use a hard aggregate as a core, they have high hardness and good dimensional stability, and have a large thickness of sludge incineration ash, so that a large amount of sludge incineration ash is used. be able to. In addition, since the sludge incineration ash adheres densely, the strength of the composite particles becomes relatively high, and it is easy to press-mold using sludge incineration ash of all kinds so that the gap between the composite particles remains. Can be. In addition, as raw materials other than the sludge incineration ash used,
Only the hard aggregate is sufficient, and the cost can be reduced. In addition, in this press molding, there is no need to use a special molding machine such as a vibration press molding machine, and the molding can be easily performed by uniaxial pressure molding.
【００２７】このため、汚泥焼却灰に含まれる凝集剤の
種類に影響を受けることなく、大量の汚泥焼却灰を用い
て、所望の透水性を有する透水性舗装材を通常の設備に
より容易に製造することができる。Therefore, a large amount of sludge incineration ash can be used to easily produce a water-permeable pavement material having a desired water permeability using ordinary equipment without being affected by the type of coagulant contained in the sludge incineration ash. can do.
【００２８】[0028]
【実施例】以下に実施例及び比較例を挙げて本発明をよ
り具体的に説明する。The present invention will be described more specifically below with reference to examples and comparative examples.
【００２９】実施例１〜１０ 表１に示す下水汚泥焼却灰、硬質骨材及び水を表１に示
す割合でアイリッヒミキサーに投入して周速２０ｍ／Ｓ
で混合、造粒し、表１に示す物性の複合粒子を製造し
た。この複合粒子を表１に示すプレス圧で一軸加圧成形
して成形体を得、この成形体を１２０℃で１時間乾燥し
た後、ローラーハースキルンにて１０５０〜１１５０
℃、焼成時間２００〜３００ｍｉｎで焼成して透水性舗
装材（２００ｍｍ×２００ｍｍ×６０ｍｍ）を製造し
た。Examples 1 to 10 The sewage sludge incineration ash, hard aggregate and water shown in Table 1 were charged into an Erich mixer at the ratio shown in Table 1, and the peripheral speed was 20 m / S.
Were mixed and granulated to produce composite particles having the physical properties shown in Table 1. The composite particles were uniaxially press-molded at the press pressure shown in Table 1 to obtain a molded body.
It baked at 200 degreeC and baking time for 200 to 300 minutes, and manufactured the water-permeable pavement material (200 mm x 200 mm x 60 mm).
【００３０】なお、実施例３と４は造粒時にバインダー
（ＰＶＡ）を下水汚泥焼却灰重量に対し２％使用した。In Examples 3 and 4, a binder (PVA) was used at 2% based on the weight of the sewage sludge incineration ash during granulation.
【００３１】得られた透水性舗装材の強度、透水性及び
収縮率を調べ、結果を表１に示した。The strength, water permeability and shrinkage of the resulting water-permeable pavement material were examined, and the results are shown in Table 1.
【００３２】表１より、本発明の方法によれば、下水汚
泥焼却灰の種類によらず、大量の下水汚泥焼却灰を用い
て、良好な透水性舗装材を製造することができることが
明らかである。It is clear from Table 1 that the method of the present invention can produce a good permeable pavement material using a large amount of sewage sludge incineration ash regardless of the type of sewage sludge incineration ash. is there.
【００３３】[0033]
【表１】 [Table 1]
【００３４】比較例１ 実施例２において、硬質骨材として、平均粒径０．２ｍ
ｍの微細なものを用いたこと以外は同様にして複合粒子
を製造したところ、複合粒子の粒径が０．３ｍｍ以下と
小さなものであった。このため、プレス成形体及び焼結
体のいずれも気孔の乏しいものであり、透水率は１０-2
ｃｍ／Ｓ以下であった。Comparative Example 1 In Example 2, as the hard aggregate, the average particle size was 0.2 m.
When composite particles were produced in the same manner except that a fine particle of m was used, the particle diameter of the composite particles was as small as 0.3 mm or less. For this reason, both the press-formed body and the sintered body have poor pores, and the water permeability is 10 −2.
cm / S or less.
【００３５】比較例２ 実施例４において、硬質骨材として、平均粒径１０ｍｍ
の大きな粒子を用いたこと以外は同様にして複合粒子を
製造したところ、得られた複合粒子の下水汚泥焼却灰層
の肉厚は硬質骨材の半径の１５％にしかならず、下水汚
泥焼却灰を大量に付着させた複合粒子を製造することは
できなかった。Comparative Example 2 In Example 4, as the hard aggregate, the average particle size was 10 mm.
When composite particles were produced in the same manner except that the large particles of the above-mentioned were used, the thickness of the sewage sludge incineration ash layer obtained was only 15% of the radius of the hard aggregate, and the sewage sludge incineration ash was It was not possible to produce composite particles deposited in large quantities.
【００３６】比較例３ 実施例８において、造粒工程で回転パン型造粒機を用い
たこと以外は同様にして複合粒子を製造した。得られた
複合粒子の付着層の層厚比（ｔ／ｒ×１００％）は４２
であったが、圧潰強度０．８ｋｇｆ／ｃｍ2 で、下水汚
泥焼却灰の緻密な付着層を形成することはできなかっ
た。Comparative Example 3 Composite particles were produced in the same manner as in Example 8, except that a rotating pan type granulator was used in the granulating step. The thickness ratio (t / r × 100%) of the adhesion layer of the obtained composite particles is 42.
However, a crushed strength of 0.8 kgf / cm 2 could not form a dense adhered layer of sewage sludge incineration ash.
【００３７】この複合粒子を用いて、実施例８と同様に
成形、焼成したところ、複合粒子が強度不足であること
から、複合粒子間の間隙が潰れてしまい、透水性は１０
-2ｃｍ／Ｓ以下で、十分な透水性を有するものは得られ
なかった。When the composite particles were molded and fired in the same manner as in Example 8, since the composite particles had insufficient strength, the gaps between the composite particles were crushed, and the water permeability was 10%.
At −2 cm / S or less, a material having sufficient water permeability was not obtained.
【００３８】[0038]
【発明の効果】以上詳述した通り、本発明の透水性舗装
材の製造方法によれば、汚泥焼却灰の種類に何ら制約を
受けることなく、大量の汚泥焼却灰を用いて、良好な透
水性舗装材を、特別な設備を要することなく、容易かつ
効率的に安価に製造することができる。As described above in detail, according to the method for producing a water-permeable pavement material of the present invention, a large amount of sludge incineration ash can be used and good water permeability can be obtained without any restriction on the type of sludge incineration ash. The pavement material can be easily, efficiently, and inexpensively manufactured without requiring special equipment.
【００３９】本発明の透水性舗装材の製造方法は、下水
処理物から大量に排出され、年々その排出量が増大する
下水汚泥焼却灰の有効利用技術として工業的に極めて有
用である。The method for producing a permeable pavement material of the present invention is industrially extremely useful as a technology for effectively utilizing sewage sludge incineration ash, which is discharged in large quantities from sewage treatment products and the amount of which is increasing year by year.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 川合 和之 愛知県常滑市鯉江本町５丁目１番地 株 式会社イナックス内 (72)発明者 村口 幸人 愛知県常滑市鯉江本町５丁目１番地 株 式会社イナックス内 (72)発明者 神谷 嘉夫 愛知県常滑市鯉江本町５丁目１番地 株 式会社イナックス内 (72)発明者 藤沢 寿郎 愛知県常滑市鯉江本町５丁目１番地 株 式会社イナックス内 (72)発明者 伊夫伎 光雄 愛知県名古屋市瑞穂区日向町２丁目１の ３ (72)発明者 石川 理 愛知県知多市西巽ヶ丘２丁目４番地の５ (56)参考文献 特開 昭62−176951（ＪＰ，Ａ) 特開 平２−137752（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C04B 33/13 ZAB ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kazuyuki Kawai 5-1-1 Koiehonmachi, Tokoname-shi, Aichi Prefecture Inside Inax Corporation (72) Inventor Yukito Muraguchi 5-1-1 Koiehonmachi, Tokoname-city, Aichi Prefecture Inside Inax, Inc. (72) Inventor Yoshio Kamiya 5-1-1 Koie Honcho, Tokoname, Aichi Prefecture Inside Inax Inc. (72) Inventor Toshiro Fujisawa 5-1-1, Koie Honmachi, Tokoname, Aichi Prefecture Inax, Inc. (72) Inventor Mitsuo Ibuki 2-3-1, Hyuga-cho, Mizuho-ku, Nagoya-shi, Aichi Prefecture (72) Inventor Osamu Ishikawa 2-4-1, Nishi-Tatsumigaoka, Chita-shi, Aichi Prefecture (56) References JP-A-62 176951 (JP, A) JP-A-2-137752 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) C04B 33/13 ZAB
Claims (1)
却灰及び水を高速回転羽根形造粒機に供給し、該硬質骨
材の外周囲に汚泥焼却灰が層厚比３０％以上で緻密に付
着した複合粒子であって、硬質骨材１００重量部に対す
る汚泥焼却灰の付着量が１００重量部以上の複合粒子を
造粒し、 この造粒された複合粒子を、複合粒子間に間隙が残留す
るようにプレスして舗装材形状の成形体とし、 その後、この成形体を焼成することを特徴とする透水性
舗装材の製造方法。1. A hard aggregate having a particle size of 0.5 to 5 mm, sludge incineration ash, and water are supplied to a high-speed rotary blade type granulator, and sludge incineration ash is formed around the hard aggregate with a layer thickness ratio of 30%. % Or more of the composite particles closely adhered to 100 parts by weight of the hard aggregate.
The composite particles having an attached amount of the sludge incineration ash of 100 parts by weight or more are granulated, and the granulated composite particles are pressed so as to leave a gap between the composite particles to form a pavement-shaped molded body, Thereafter, the molded body is fired to produce a water-permeable pavement material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05095775A JP3111742B2 (en) | 1993-04-22 | 1993-04-22 | Manufacturing method of permeable pavement material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05095775A JP3111742B2 (en) | 1993-04-22 | 1993-04-22 | Manufacturing method of permeable pavement material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06305810A JPH06305810A (en) | 1994-11-01 |
| JP3111742B2 true JP3111742B2 (en) | 2000-11-27 |
Family
ID=14146863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05095775A Expired - Fee Related JP3111742B2 (en) | 1993-04-22 | 1993-04-22 | Manufacturing method of permeable pavement material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3111742B2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4911762B2 (en) * | 2006-10-16 | 2012-04-04 | 花王株式会社 | Method for producing composite particles |
-
1993
- 1993-04-22 JP JP05095775A patent/JP3111742B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06305810A (en) | 1994-11-01 |
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