JP2859555B2 - Manufacturing method of permeable material - Google Patents
Manufacturing method of permeable materialInfo
- Publication number
- JP2859555B2 JP2859555B2 JP8797895A JP8797895A JP2859555B2 JP 2859555 B2 JP2859555 B2 JP 2859555B2 JP 8797895 A JP8797895 A JP 8797895A JP 8797895 A JP8797895 A JP 8797895A JP 2859555 B2 JP2859555 B2 JP 2859555B2
- Authority
- JP
- Japan
- Prior art keywords
- particle size
- water
- permeable material
- melting point
- 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
Landscapes
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、道路用敷石などに使用
される透水材の製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a permeable material used for road paving stones and the like.
【０００２】[0002]
【従来の技術】透水性舗装材として、透水性コンクリー
トによるもの、粗大骨材を樹脂にて固めたもの、骨材を
成形し焼成したものなどが製造されている。この中で焼
成による透水材は、透水性を確保するために骨材として
は比較的粒径の大きいものが用いられており、例えば平
均粒径が1500〜2500μm 、3000μm 以上の粒径物が25〜
35％、350 μm 以下の粒径物が０％のものを融点が800
℃の釉薬を焼成助剤と混合し、800 ℃で焼成する方法が
取られている。しかしこのような従来法により製造され
た透水材は、十分な機械的強度が得られないという問題
があった。また強度を増すために骨材の粒径を小さくす
ると、透水性が低下するという問題があった。2. Description of the Related Art As a water-permeable pavement material, a material made of water-permeable concrete, a material obtained by solidifying coarse aggregate with resin, and a material obtained by molding and firing an aggregate are manufactured. Among them, the water permeable material obtained by firing has a relatively large particle size as an aggregate in order to secure water permeability.For example, an average particle size of 1500 to 2500 μm, and a particle size of 3000 μm or more is 25%. ~
35%, 0% particle size 350μm or less
A method is used in which a glaze at ℃ is mixed with a sintering aid and baked at 800 ℃. However, the water permeable material manufactured by such a conventional method has a problem that sufficient mechanical strength cannot be obtained. Further, when the particle size of the aggregate is reduced in order to increase the strength, there is a problem that the water permeability decreases.
【０００３】[0003]
【発明が解決しようとする課題】本発明は上記した従来
の問題点を解決し、透水性と強度とを両立させた透水材
を得ることができる透水材の製造方法を提供するために
なされたものである。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems and to provide a method of manufacturing a water-permeable material capable of obtaining a water-permeable material having both water permeability and strength. Things.
【０００４】[0004]
【課題を解決するための手段】上記の課題を解決するた
めになされた本発明は、平均粒径が1000〜2000μm 、30
00μm 以上の粒径物が５％以下、350 μm 以下の粒径物
が30％以下の無機質骨材を、900 〜1200℃の融点を持つ
焼成助剤と混合したうえ、焼成助剤の融点よりも30〜80
℃低い温度で焼成することを特徴とする透水材の製造方
法を要旨とするものである。Means for Solving the Problems The present invention has been made to solve the above problems, and has an average particle diameter of 1000 to 2000 μm.
Inorganic aggregates having a particle size of 00 μm or more of 5% or less and a particle size of 350 μm or less of 30% or less are mixed with a sintering aid having a melting point of 900 to 1200 ° C. Also 30-80
A gist of the present invention is a method for producing a water-permeable material, characterized by firing at a temperature lower by ° C.
【０００５】[0005]
【作用】本発明によれば、使用される無機質骨材の粒度
を従来よりも細かくしたので、隣接する無機質骨材間の
接触確率および接触面積が増加すること、また無機質骨
材内のクラック等の内在欠陥の存在確率が低下すること
により、構造体の強度向上が可能となる。また上記の粒
度分布は、骨材原材料の破砕工程後の粒度分布とほぼ同
じであるので、破砕後の骨材のうち使用できない部分が
減少し、原料利用効率が向上する。この点は特に廃棄物
溶融スラグを原料とする場合、廃棄物の有効利用の観点
からも有効である。According to the present invention, the particle size of the inorganic aggregate used is made finer than before, so that the contact probability and contact area between adjacent inorganic aggregates are increased, and cracks and the like in the inorganic aggregate are increased. Is reduced, the strength of the structure can be improved. Further, since the above particle size distribution is almost the same as the particle size distribution of the aggregate raw material after the crushing step, unusable portions of the crushed aggregate are reduced, and the raw material utilization efficiency is improved. This point is also effective from the viewpoint of effective utilization of waste, especially when waste slag is used as a raw material.
【０００６】なお後の実施例にも示すように、平均粒径
が2000μm よりも大きくなったり、3000μm 以上の粒径
物が５％を越えると強度の低下を招き、逆に平均粒径が
1000μm よりも小さくなったり、350 μm 以下の粒径物
が30％を越えると透水性の低下を招くので好ましくな
い。[0006] As shown in the examples below, when the average particle size is larger than 2000 µm, or when the particle size of 3000 µm or more exceeds 5%, the strength is reduced.
If the particle size is smaller than 1000 μm or the particle size is not larger than 350 μm, it is not preferable because the water permeability is reduced.
【０００７】また本発明では、従来よりも高融点の焼成
助剤を使用し、しかもその融点よりも30〜80℃低い温度
で焼成を行う。まず900 〜1200℃の融点を持つ焼成助剤
を使用して焼成温度を従来よりも上昇させたため、無機
質骨材の溶融温度(1200 〜1400℃) に近づき、骨材間の
焼結が進行し易くなって構造体の強度向上が図られる。
ところがその反面、構造体の収縮率が増加して透水性が
低下する。しかし本発明では、焼成助剤の融点よりも30
〜80℃低い温度で焼成することにより、骨材間への焼成
助剤の浸透を調節し、焼結促進効果をコントロールして
透水性と強度とを両立させることができる。ここで焼成
温度がこの範囲よりも低温となると強度の不足を招き、
この範囲よりも高温となると透水性の低下を招くので好
ましくない。なお、本発明における焼成助剤の融点はＪ
ＩＳ−Ｋ２１５１により示される試験方法により定めら
れた融点である。Further, in the present invention, a sintering aid having a higher melting point than the conventional one is used, and sintering is performed at a temperature 30 to 80 ° C. lower than the melting point. First, the sintering temperature was raised by using a sintering aid with a melting point of 900 to 1200 ° C, which approached the melting temperature of the inorganic aggregate (1200 to 1400 ° C), and sintering between the aggregates progressed. As a result, the strength of the structure is improved.
However, on the other hand, the contraction rate of the structure increases and the water permeability decreases. However, in the present invention, the melting point of the firing aid is 30
By sintering at a temperature lower by ℃ 80 ° C., it is possible to adjust the penetration of the sintering aid between the aggregates, control the sintering promotion effect, and achieve both water permeability and strength. Here, if the firing temperature is lower than this range, the strength becomes insufficient,
If the temperature is higher than this range, the water permeability is undesirably reduced. The melting point of the sintering aid in the present invention is J
It is the melting point determined by the test method indicated by IS-K2151.
【０００８】[0008]
【実施例】以下に本発明を実施例によって更に詳細に説
明する。融点が1320℃である無機骨材を振動式破砕機で
破砕・分級し、表１に示すとおり粒度分布を変化させた
無機質骨材とした。これに焼成助剤として釉薬およびデ
ンプン系の成形助剤を添加し、加圧プレス機により成形
して焼成した。製造条件は次の通りである。 ・骨材組成：SiO2：46.4％（重量％、以下同じ）、Al2O
3 ：18.4％、CaO ：6.9％、Fe2O3 ：9.3 ％、P2O5：6.8
％、MgO ：2.5 ％ ・焼成条件：950 ℃×10時間 ・焼成助剤：添加率10％、融点1000℃、フラックス分1
6.2％ ・製品寸法：200 ×100 ×60mm 得られた成形品（透水材）の強度、透水性、収縮率につ
いて評価を行い、表１中に記した。なお、評価の基準は
表２に示す通りである。表１の評価結果に示されるよう
に、本発明の範囲の粒度分布の無機質骨材を用いた場合
には、強度、透水性、収縮の各項目とも優れた透水材が
得られることが分かる。The present invention will be described in more detail with reference to the following examples. An inorganic aggregate having a melting point of 1320 ° C. was crushed and classified by a vibration crusher to obtain an inorganic aggregate having a changed particle size distribution as shown in Table 1. A glaze and a starch-based molding aid were added thereto as a firing aid, and the mixture was molded by a pressure press machine and fired. The manufacturing conditions are as follows.・ Aggregate composition: SiO 2 : 46.4% (wt%, same hereafter), Al 2 O
3: 18.4%, CaO: 6.9 %, Fe 2 O 3: 9.3%, P 2 O 5: 6.8
%, MgO: 2.5%-Firing conditions: 950 ° C x 10 hours-Firing aid: Addition rate 10%, melting point 1000 ° C, flux 1
6.2% ・ Product dimensions: 200 × 100 × 60mm The strength, water permeability and shrinkage of the obtained molded product (water-permeable material) were evaluated and are shown in Table 1. The evaluation criteria are as shown in Table 2. As shown in the evaluation results of Table 1, when the inorganic aggregate having the particle size distribution in the range of the present invention is used, it is understood that excellent water permeable materials can be obtained in each of the items of strength, water permeability, and shrinkage.
【０００９】[0009]
【表１】 [Table 1]
【００１０】[0010]
【表２】 [Table 2]
【００１１】次に、骨材の粒度を代表的な値である平均
粒径が1050μm 、3000μm 以上のもの０％、350 μm 以
下のもの15％に固定し、焼成助剤の融点と焼成温度を表
３のように変化させて同様の実験を行った。表３から、
本発明のように焼成助剤の融点を900 〜1200℃とし、焼
成助剤の融点よりも30〜80℃低い温度で焼成した場合
に、強度、透水性、収縮の各項目とも優れた透水材が得
られることが分かる。Next, the particle size of the aggregate is fixed to a typical value of 1050 μm, 0% for 3000 μm or more, and 15% for 350 μm or less, and the melting point and firing temperature of the firing aid are fixed. A similar experiment was performed with the changes shown in Table 3. From Table 3,
When the melting point of the sintering aid is 900 to 1200 ° C. and the sintering is performed at a temperature 30 to 80 ° C. lower than the melting point of the sintering aid as in the present invention, the water permeable material having excellent strength, water permeability, and shrinkage is obtained. Is obtained.
【００１２】[0012]
【表３】 [Table 3]
【００１３】[0013]
【発明の効果】以上に説明したように、本発明によれば
前記した粒度分布の無機質骨材を900 〜1200℃の融点を
持つ焼成助剤と混合したうえ、焼成助剤の融点よりも30
〜80℃低い温度で焼成することにより、透水性と強度と
を両立させた透水材を得ることができる。このため本発
明は特に汚泥溶融水砕スラグの有効利用に適した透水材
の製造方法として、業界に大きく寄与するものである。As described above, according to the present invention, the inorganic aggregate having the above-mentioned particle size distribution is mixed with a sintering agent having a melting point of 900 to 1200 ° C.
By sintering at a temperature lower by 8080 ° C., a water-permeable material having both water permeability and strength can be obtained. Therefore, the present invention greatly contributes to the industry as a method for producing a water-permeable material particularly suitable for effective use of the granulated sludge.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) C04B 38/00 303 C04B 38/00 304──────────────────────────────────────────────────続 き Continuation of front page (58) Field surveyed (Int. Cl. 6 , DB name) C04B 38/00 303 C04B 38/00 304
Claims (1)
上の粒径物が５％以下、350 μm 以下の粒径物が30％以
下の無機質骨材を、900 〜1200℃の融点を持つ焼成助剤
と混合したうえ、焼成助剤の融点よりも30〜80℃低い温
度で焼成することを特徴とする透水材の製造方法。1. An inorganic aggregate having an average particle size of 1000-2000 μm, a particle size of 3000 μm or more having a particle size of 5% or less, and a particle size of 350 μm or less having a particle size of 30% or less. A method for producing a water-permeable material, comprising mixing with an auxiliary agent and firing at a temperature 30 to 80 ° C. lower than the melting point of the firing auxiliary agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8797895A JP2859555B2 (en) | 1995-04-13 | 1995-04-13 | Manufacturing method of permeable material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8797895A JP2859555B2 (en) | 1995-04-13 | 1995-04-13 | Manufacturing method of permeable material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08283081A JPH08283081A (en) | 1996-10-29 |
| JP2859555B2 true JP2859555B2 (en) | 1999-02-17 |
Family
ID=13929925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8797895A Expired - Fee Related JP2859555B2 (en) | 1995-04-13 | 1995-04-13 | Manufacturing method of permeable material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2859555B2 (en) |
-
1995
- 1995-04-13 JP JP8797895A patent/JP2859555B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08283081A (en) | 1996-10-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19981117 |
|
| LAPS | Cancellation because of no payment of annual fees |