JPH08208286A - Production of sintered artificial aggregate for road/ building material - Google Patents
Production of sintered artificial aggregate for road/ building materialInfo
- Publication number
- JPH08208286A JPH08208286A JP1764595A JP1764595A JPH08208286A JP H08208286 A JPH08208286 A JP H08208286A JP 1764595 A JP1764595 A JP 1764595A JP 1764595 A JP1764595 A JP 1764595A JP H08208286 A JPH08208286 A JP H08208286A
- Authority
- JP
- Japan
- Prior art keywords
- particles
- aggregate
- particle size
- shape
- artificial 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/023—Fired or melted materials
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Civil Engineering (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
Abstract
Description
【０００１】[0001]
【技術分野】本発明は、道路・建材用焼結人工骨材、な
かでもアスファルトやセメント、樹脂等と混合して、道
路舗装材料や建設材料等に有利に使用されるコンクリー
ト用の人工焼結骨材の製造方法に係り、特にトンネル
内、曲がり角、夜間用、滑り止め、バス路線、景観材料
等に使用される明色又は着色人工骨材、また、建材用と
しては大理石、花崗岩等の人工石材用として好適に使用
され得る人工明色、着色骨材を製造する方法に関するも
のである。また、整粒し、粒度の揃った骨材について
は、排水性舗装用の骨材としても、有利に使用されるも
のである。TECHNICAL FIELD The present invention relates to a synthetic artificial aggregate for road / construction materials, and in particular, artificial sintering for concrete which is advantageously used for road paving materials, construction materials, etc. by mixing with asphalt, cement, resin, etc. Related to the manufacturing method of aggregates, especially light or colored artificial aggregates used in tunnels, corners, nights, non-slip, bus routes, landscape materials, etc., and artificial materials such as marble and granite for construction materials. The present invention relates to a method for producing an artificial bright color or colored aggregate that can be preferably used for stone materials. In addition, aggregates that have been sized and uniform in particle size are also advantageously used as aggregates for drainage pavement.
【０００２】[0002]
【背景技術】従来から、道路用若しくは建設用のコンク
リート用骨材には、一般に、天然に採取された比較的安
価な砕石が使用されて来ている。しかし、この天然砕石
としては、硬質砂岩、輝緑凝灰岩、安山岩等が使用され
ているが、何れも、任意の着色のものが得られず、明
色、着色骨材としての使用は難しく、また採取量にも限
界がある。BACKGROUND ART Conventionally, as a concrete aggregate for roads or construction, generally, relatively inexpensive crushed stones that have been naturally extracted have been used. However, as this natural crushed stone, hard sandstone, diabase tuff, andesite, etc. are used, but in any case, any colored one is not obtained, and it is difficult to use as a bright color or colored aggregate, and There is a limit to the amount that can be collected.
【０００３】そこで、これらの用途に関して、最近で
は、着色焼結人工骨材が使用され始めているが、これら
新骨材については、骨材形状、製品歩留り等、多くの問
題が内在しているのである。Therefore, for these uses, recently, colored sintered artificial aggregates have begun to be used. However, since these new aggregates have many problems such as aggregate shape and product yield. is there.
【０００４】因みに、現状の焼結人工骨材の製造方法と
しては、図１に示される如く、原料粘土、陶石、長石等
を粉砕配合し、これに着色剤を混合したスラリーを、フ
ィルタープレスで脱水した後、押出成形によって、レン
ガ状成形品を作製し、乾燥させるか、または前記スラリ
ーをスプレードライヤーで乾燥して得られる球状粘土
を、加圧成形により、タイル状成形品に作製した後、ト
ンネルキルンにより焼成して、焼結レンガ状成形品若し
くはタイル状成形品を作り、次いで天然砕石と同じよう
な粉砕工程を３〜４段通して、整粒する方式を取ってい
る。Incidentally, as a current method for producing a sintered artificial aggregate, as shown in FIG. 1, raw clay, porcelain stone, feldspar, etc. are pulverized and blended, and a slurry obtained by mixing this with a colorant is subjected to filter pressing. After dehydration in, by extrusion molding, to make a brick-shaped molded product, and dried, or after the spherical clay obtained by drying the slurry with a spray dryer, by pressure molding, after making a tile-shaped molded product , A tunnel kiln is used to produce a sintered brick-shaped molded product or a tile-shaped molded product, and then a crushing process similar to that of natural crushed stone is passed through 3 to 4 steps to adjust the size.
【０００５】しかしながら、この方式によると、焼成後
の硬度の高い緻密な構造を有する焼結製品を粉砕しなけ
ればならないために、天然石の粉砕による砕石と同様
な、若しくはそれ以上の問題を持つことになったのであ
る。However, according to this method, since a sintered product having a dense structure with high hardness after firing has to be crushed, there is a problem similar to or more than crushed stone by crushing natural stone. It became.
【０００６】而して、その主たる問題は、砕石形状と歩
留りに関するものであり、砕石形状については、緻密な
焼結製品を粉砕するために、へき開値に近い構造を取る
ところから、砕石の理想形状と言われる、稜角に富んだ
立方体に近い形状に砕かれるものが少なく、薄い又は細
長い骨材を多く含むことになり、このために、コンクリ
ート混合物での骨材間隙率が増加して、アスファルト等
の添加量が増加し、これによりコンクリートの安定度が
低下して、轍掘れ等の主要因となっているのである。ま
た、骨材が薄いために、破砕試験すり減り量も増加し、
アスファルト混合物の性能面で望ましくない問題を惹起
する。また、へき開面状の破砕面は平滑であるために、
アスファルト、セメント等との親和性も悪く、この面で
も問題となるのである。[0006] The main problem is the crushed stone shape and the yield. Regarding the crushed stone shape, since it takes a structure close to the cleavage value for crushing a dense sintered product, the ideal crushed stone There are few things that are said to be shaped into a shape close to a cube with abundant ridge angles, and it will contain a lot of thin or elongated aggregate, which will increase the porosity of aggregate in the concrete mixture, and The added amount of etc. increases, which reduces the stability of concrete and is the main cause of rut excavation. In addition, since the aggregate is thin, the amount of abrasion in the crush test also increases,
It causes undesired problems in the performance of asphalt mixture. Also, since the cleaved crushed surface is smooth,
It has a poor affinity with asphalt, cement, etc., which is also a problem in this respect.
【０００７】また、歩留りに関しても、焼成後に粉砕す
る場合には、レンガ状又はタイル状の成形品を３段から
４段の工程に従って粉砕するために、３ｍｍ以下の微小
粒子等、大量の不要製品が発生し、これが歩留りを低下
させる原因ともなっているのである。そして、これによ
って、元々高価な人工骨材のコストを押し上げる結果と
もなっているのである。Regarding the yield, when crushing after firing, a brick-shaped or tile-shaped molded product is crushed in accordance with the steps of 3 to 4 steps, so a large amount of unnecessary products such as fine particles of 3 mm or less Occurs, which also causes a decrease in yield. And, this also results in the cost of the originally expensive artificial aggregate being pushed up.
【０００８】このため、本発明者らは、そのような課題
を解決すべく、鋭意研究の結果、在来の製法とは全く異
なる製法、即ち、湿式粉砕原料のフィルターケーキ若し
くはそれから得られる成形物の乾燥の後に、乾燥又は半
乾燥の状態で粉砕、整粒し、その後ロータリーキルン等
の回転型キルンを使用して、転動させながら、焼成せし
める手法を採用することにより、高い生産性を確保しつ
つ、骨材として充分な機能をもたらしめ、且つ骨材形態
として多稜構造の理想的な形態を得ると共に、工程歩留
りを有利に向上せしめ得る事実を見出して、これを、先
に、特願平６−２１３３６６号として出願した。しかし
ながら、本発明者らの更なる検討の結果、この先に提案
した手法にあっても、粉砕によって目的とする粒度若し
くは粒度分布と為すものであるために、粉砕操作の巧拙
や粉砕粉の発生による歩留り低下は避けられ得ず、また
粉砕後の乾燥工程中において、目的とする形状が変化す
る等の問題が内在していることが明らかとなった。[0008] Therefore, as a result of intensive research to solve such problems, the present inventors have found that a manufacturing method completely different from the conventional manufacturing method, that is, a filter cake of a wet grinding raw material or a molded product obtained therefrom. High productivity is ensured by adopting a method of pulverizing and sizing in a dry or semi-dry state after drying, and then using a rotary kiln such as a rotary kiln to bake while rolling. At the same time, we have found the fact that it can provide a sufficient function as an aggregate and can obtain an ideal form of a multi-edge structure as an aggregate form, and can also improve the process yield advantageously, The application was filed as Hei 6-213366. However, as a result of further study by the present inventors, even in the method proposed above, since the intended particle size or particle size distribution is achieved by pulverization, due to the skill of the pulverizing operation and the generation of pulverized powder. It became clear that the reduction in yield is unavoidable, and that there is an inherent problem that the target shape changes during the drying process after crushing.
【０００９】[0009]
【解決課題】ここにおいて、本発明は、かかる事情を背
景にして為されたものであって、その課題とするところ
は、優れた量産性の下に、在来の人工骨材にない、骨材
の粒形状が良く、歩留りの高い、有利な道路・建材用焼
結人工骨材の製造方法を提供することにある。The present invention has been made in view of such circumstances, and the object of the present invention is to achieve excellent mass productivity, which is not present in conventional artificial aggregates. An object of the present invention is to provide an advantageous method for producing a sintered artificial aggregate for road and building materials, which has a good grain shape and a high yield.
【００１０】[0010]
【解決手段】そして、本発明者らは、上記した課題を解
決すべく、更に鋭意研究を重ね、先に出願の製造方式を
更に一歩進めた結果、先ず、第一の工程にて所望の粒子
形状に造粒し、その後、第二の工程においては、流動さ
せることなく乾燥せしめ、更に第三の工程において、量
産性と骨材性質の向上の面から、ロータリーキルン等の
回転型キルンを用いて転動焼成することにより、成形粒
子の形状変形及び粒度分布の変動が少なく、均一に焼成
され、以て形状変形及び色斑の少ない良質な骨材を得る
ことが出来ると共に、この全工程を通じて粉砕工程を含
まないことが特色となり、従来の手法により得られるよ
うな３ｍｍ以下の細粒発生が殆どなく、工程歩留りが極
端に向上する事実を見い出し、本発明を完成するに至っ
たのである。SOLUTION: The inventors of the present invention conducted further diligent research in order to solve the above-mentioned problems, and as a result of further advancing the manufacturing method of the application, one step is to obtain desired particles in the first step. Granulate into a shape, then dry in the second step without flowing, and in the third step, use a rotary kiln such as a rotary kiln to improve mass productivity and aggregate properties. By rolling baking, the shape deformation of the formed particles and the fluctuation of the particle size distribution are small, and it is evenly baked, so that it is possible to obtain a high quality aggregate with less shape deformation and color spots, and it is crushed throughout this process. The feature of this method is that it does not include a step, and the fact that there is almost no generation of fine particles of 3 mm or less as obtained by the conventional method and the step yield is extremely improved was found, and the present invention was completed.
【００１１】従って、本発明の要旨とするところは、原
料鉱物若しくは粘土を粉砕調合した後、焼成後に目的と
する粒子形状、粒度若しくは粒度分布のものを与え得る
ように、所定形状の粒子として造粒成形する第一の工程
と、該第一の工程において得られた成形粒子を、流動さ
せることなく、乾燥せしめる第二の工程と、かかる乾燥
された成形粒子を、ロータリーキルンの如き回転型キル
ンに投入して、該回転型キルンにて転動、焼成する第三
の工程とを、含むことを特徴とする道路・建材用焼結人
工骨材の製造方法にある。Therefore, the gist of the present invention is that after the raw material mineral or clay is pulverized and blended, it is formed into particles having a predetermined shape so that the desired particle shape, particle size or particle size distribution can be obtained after firing. The first step of grain forming, the second step of drying the formed particles obtained in the first step without flowing, and the dried formed particles are put into a rotary kiln such as a rotary kiln. A third step of throwing in and rolling and firing in the rotary kiln is included, and a method for producing a sintered artificial aggregate for road / construction material is provided.
【００１２】なお、このような本発明に従う道路・建材
用焼結人工骨材の製造方法における望ましい態様によれ
ば、前記第二の工程における乾燥操作は、前記成形粒子
の水分率が１２％以下となるまで行なわれ、これによっ
て第三の工程における有効な形状の保持が有利に実現さ
れることとなるのである。According to a preferred embodiment of the method for producing a sintered artificial aggregate for road / building material according to the present invention, the drying operation in the second step has a moisture content of the formed particles of 12% or less. Until the effective shape is maintained in the third step.
【００１３】また、かかる本発明手法の望ましい態様の
他の一つによれば、前記第二の工程において、乾燥操作
の後、目的とする粒子形状、粒度若しくは粒度分布の焼
成粒子を与え得ない粒子が、原料として回収されて、再
度利用することとされ、原料利用率の向上が図られるの
である。According to another preferred embodiment of the method of the present invention, in the second step, after the drying operation, it is not possible to give burned particles having a desired particle shape, particle size or particle size distribution. The particles are collected as a raw material and reused, so that the raw material utilization rate is improved.
【００１４】[0014]
【具体的構成】ところで、このような本発明に従う人工
骨材の製造方法について、その一例を示す第２図を参照
しつつ、より詳細に述べるならば、先ず、原料として
は、アルミナ、ムライト、スピネル等を形成するアルミ
ナ、珪砂、マグネシア等の粉砕配合物でも良いが、一般
には、カオリン単味又は陶石、長石、カオリン、粘土等
の粉砕配合物である陶磁器用粘土、タイル用粘土等が有
利に使用され、中でも、明度の高いものを得るには、酸
化鉄、酸化チタンの含有量の少ない素材が使用されるこ
ととなる。Concrete Structure By the way, the manufacturing method of the artificial aggregate according to the present invention will be described in more detail with reference to FIG. 2 showing an example thereof. First, as raw materials, alumina, mullite, Alumina, silica sand, magnesia, etc. which form spinel may be crushed compounds, but generally, kaolin alone or porcelain stone, feldspar, kaolin, clay, etc. In order to obtain a material that is advantageously used and has high brightness, a material having a low content of iron oxide and titanium oxide is used.
【００１５】そして、このような原料を湿式にて粉砕配
合し、要すれば着色剤を配合して、スラリーを作製した
後、フィルタープレスで脱水し、更にこの得られたケー
キをオーガーマシン等の真空成形機にて、焼成後に目的
とする粒子形状、所要粒度又は粒度分布になるように、
造粒成形するのである。このような造粒成形工程が、第
一の工程となる。Then, such raw materials are pulverized and blended by a wet method, and if necessary, a colorant is blended to prepare a slurry, which is then dehydrated by a filter press, and the cake thus obtained is subjected to an auger machine or the like. With a vacuum forming machine, after firing, to obtain the desired particle shape, required particle size or particle size distribution,
It is granulated. Such a granulation molding step is the first step.
【００１６】次いで、上記第一の工程にて得られた成形
粒子は、粒子相互間の衝突や転動の少ないコンベアベル
ト乾燥機を用いたり、又はさや等を利用し、それに成形
粒子を収容して、トンネル乾燥機等を用いて、乾燥せし
められる。この第二の工程たる乾燥工程において重要な
ことは、成形粒子を流動させることなく乾燥せしめるこ
とにあり、これによって粒子形状が有利に維持される。
また、この乾燥工程によって、成形粒子は所定の水分率
以下となるように管理されることとなるが、その水分率
としては、一般に、１２％以下が望ましく、更に望まし
いのは８％以下である。けだし、成形粒子が多稜面を有
する場合に、前記の水分率より低い水分率の乾燥状態で
あると、稜角のエッヂのシャープさを有利に確保するこ
とが出来るからである。反対に、水分率の上昇に従っ
て、成形粒子のエッジが丸くなっていく。尤も、エッヂ
が丸くなるに従って、実績率が漸次上がり、アスファル
トの使用量が減少する利点が生じるが、多稜形態が漸次
消失するようになる。よって、成形粒子中の水分率は、
骨材の使用用途に従って管理することが必要となるので
ある。Next, the molded particles obtained in the first step are stored in the molded particles by using a conveyor belt dryer with less collision or rolling between particles, or by using a sheath or the like. Then, it is dried using a tunnel dryer or the like. What is important in this second step, the drying step, is that the shaped particles are dried without flowing, whereby the particle shape is advantageously maintained.
In addition, by this drying step, the shaped particles are controlled so as to have a predetermined water content or less, and the water content is generally preferably 12% or less, more preferably 8% or less. . This is because, when the molded particles have a multi-ridged surface and the moisture content is lower than the above-mentioned moisture content, the edge sharpness of the ridge angle can be advantageously secured. On the contrary, as the moisture content increases, the edges of the molded particles become rounded. However, as the edge becomes rounder, the performance rate gradually increases and the asphalt usage amount decreases, but the multi-edge shape gradually disappears. Therefore, the water content in the molded particles is
It is necessary to manage the aggregate according to the intended use.
【００１７】特に、上記の乾燥工程では、成形粒子を流
動させない静置方式を採用しているところから、粒子の
変形、破砕が少なく、従って、微粉の発生も少ない。そ
して、そのため、原料へフィードバックさせるコンベア
ベルトのネット下等に発生する細粒は、極めて少なく、
１％以下となるのである。なお、このように、かかる乾
燥操作の後、目的とする粒子形状、粒度若しくは粒度分
布の焼成粒子を与え得ない粒子を、原料として回収し、
再利用するようにすれば、原料歩留りは更に向上せしめ
られ得ることとなる。In particular, in the above-mentioned drying step, since the stationary method in which the molded particles are not flowed is adopted, the particles are less deformed and crushed, and accordingly, the generation of fine powder is also less. And, therefore, the fine particles generated under the net of the conveyor belt to be fed back to the raw material are extremely small,
It is less than 1%. In this way, after such a drying operation, the particles that cannot give the target particle shape, the particle size or the calcined particles of the particle size distribution are recovered as a raw material,
If it is reused, the raw material yield can be further improved.
【００１８】また、以上の第一及び第二の成形、乾燥工
程までは、原料粉砕乾燥粉末に対してバインダ及び水分
を加えて、成形が行なわれる乾式の加圧成形プロセスを
使用しても可能である。Further, it is also possible to use a dry pressure molding process in which a binder and moisture are added to the raw material pulverized dry powder until the above-mentioned first and second molding and drying steps to carry out molding. Is.
【００１９】その後、第三の工程においては、上記で成
形、乾燥された粒子を、量産性の向上と焼成の均一のた
めに、転動式のロータリーキルン等の回転型キルンを用
い、その焼成温度において転動、焼成せしめる。これに
よって、目的とする粒子形状、粒度、粒度分布の骨材粒
子が、均一な品質において、生産性良く得られるのであ
る。Thereafter, in the third step, the particles shaped and dried as described above are heated at a baking temperature thereof using a rotary kiln such as a rotary rotary kiln in order to improve mass productivity and uniform baking. Roll and bake at. As a result, aggregate particles having a desired particle shape, particle size, and particle size distribution can be obtained with uniform quality and high productivity.
【００２０】なお、ロータリーキルンを用いた骨材粒子
の通常の焼成手法の場合、粒子を未乾燥のままロータリ
ーキルンに投入せしめ、かかるキルンの初期工程で乾燥
し、次いで後期工程で焼成を完了するものであるところ
から、その初期工程の転動乾燥操作により、丸味の多い
粒子となり、所与の粒子形状を得ることが難しく、且つ
歩留りを悪くしていたのである。しかるに、本発明に係
る手法のように、成形（第一の工程）、乾燥（第二の工
程）の後に、焼成（第三の工程）の各工程を経由するこ
とによって、初めて、所望の焼成粒子形状を得ることが
出来、且つ工程歩留りを著しく向上せしめることが可能
となるのである。Incidentally, in the case of a usual method for firing aggregate particles using a rotary kiln, the particles are put into a rotary kiln in an undried state, dried in the initial step of the kiln, and then fired in the latter step. From a certain point, the rolling drying operation in the initial step results in particles having a large roundness, making it difficult to obtain a given particle shape and degrading the yield. However, as in the method according to the present invention, after the molding (first step), drying (second step), and firing (third step), the desired firing is not performed for the first time. The particle shape can be obtained, and the process yield can be significantly improved.
【００２１】このように、本発明手法にあっては、第一
の工程で造粒された成形粒子が、第二の工程の乾燥に
て、その粒子形状及び粒度分布を固定し、次いで第三の
工程にて転動焼成されるものであるところから、成形粒
子の形状変形及び粒度分布の変動が少なく、均一に焼成
されるのであり、以て形状及び色斑の少ない骨材を得る
ことが出来ると共に、全工程を通じて粉砕工程を含んで
いないところから、従来方法の如き３ｍｍ以下の細粒発
生が殆どなく、工程歩留りが極端に向上され得たのであ
る。As described above, in the method of the present invention, the shaped particles granulated in the first step have their particle shape and particle size distribution fixed by the drying in the second step, and then the third step. Since it is tumbled and fired in the process of 1, the shape deformation of the formed particles and the fluctuation of the particle size distribution are small, and it is fired uniformly, so that it is possible to obtain an aggregate with less shape and color spots. In addition, since the crushing step was not included in all the steps, there was almost no generation of fine particles of 3 mm or less as in the conventional method, and the process yield could be extremely improved.
【００２２】また、このような本発明手法にて得られる
骨材を用いることによって、アスファルト混合物の安定
性が増加し、一方流動性が減少し、轍掘れの低下による
交通轍の防止保全手数の減少等、その効果には著しいも
のがある。また、すり減り減量も低くなるために、摩耗
も減少し、更に表面が粗面のために、アスファルトの剥
離性の問題も改善され、石はね等の事故も減少され得る
ことも考えられるのである。Further, by using the aggregate obtained by the method according to the present invention, the stability of the asphalt mixture is increased, while the fluidity is decreased, and the number of maintenance steps for preventing traffic ruts due to the reduction of ruts is reduced. The effect is remarkable, such as reduction. Further, since the abrasion loss is also low, the abrasion is also reduced, and the rough surface makes it possible to improve the problem of asphalt peelability, and it is also possible that accidents such as stone splashes can be reduced. .
【００２３】[0023]
【実施例】以下、本発明の実施例を示し、本発明の構成
を更に具体的に明らかにするが、本発明は、以下の実施
例又は更に上記の具体的記述以外にも、本発明の趣旨を
逸脱しない限りにおいて、当業者の知識に基づく種々な
る変更、修正、改良等が加えられ得るものであること
が、理解されるべきである。EXAMPLES The present invention will now be described in more detail with reference to the examples of the present invention. However, the present invention is not limited to the examples and the specific description above, and the present invention is not limited to the examples. It should be understood that various changes, modifications, improvements and the like based on the knowledge of those skilled in the art can be made without departing from the spirit.
【００２４】先ず、原料としては、単純化のために、市
販のカオリン鉱物を用いた。なお、その化学組成を下記
表１に示す。この化学組成は、蛍光Ｘ線分析によって測
定して得られたものである。First, for the sake of simplicity, a commercially available kaolin mineral was used as a raw material. The chemical composition is shown in Table 1 below. This chemical composition was obtained by measurement by fluorescent X-ray analysis.
【００２５】[0025]
【表１】 ＊ 単位 ： 重量％[Table 1] * Unit:% by weight
【００２６】そして、このカオリン鉱物を粗粉砕の後、
ボールミル中に投入し、更に水を加えて、平均粒子径が
３００μｍ以下となるまで、湿式法により粉砕を行な
い、泥漿を得た。次いで、この泥漿中に所定の着色剤を
配合し、更に攪拌して、得られた泥漿をフィルタープレ
スにて脱水した後、オーガーマシンを用いて、目的とす
る骨材粒子形状、粒度、粒度分布を与えるように、造
粒、成形した。Then, after roughly crushing the kaolin mineral,
The mixture was placed in a ball mill, water was further added, and the mixture was pulverized by a wet method until the average particle diameter became 300 μm or less, to obtain a slurry. Next, after mixing the specified colorant in this slurry and further stirring and dehydrating the resulting slurry with a filter press, the target aggregate particle shape, particle size, particle size distribution is obtained using an auger machine. Was granulated and molded so as to give
【００２７】なお、この際の成形粒子形状は、図３に示
す如く、（ａ）不等辺四角柱と（ｂ）不等辺五角柱との
二つの形状を呈し、成形粒子は、それらの５０％ずつの
ブレンドで、粒度分布は焼成後の篩分けテストで、下記
表２に示す如く、６号砕石類似の分布になるべく、設計
を行なった。As shown in FIG. 3, the shape of the shaped particles at this time has two shapes: (a) unequal-sided quadrangular prism and (b) unequal-sided pentagonal column, and the shaped particles have 50% of them. With each blend, the particle size distribution was designed by a sieving test after firing to have a distribution similar to No. 6 crushed stone as shown in Table 2 below.
【００２８】[0028]
【表２】 [Table 2]
【００２９】その後、このようにして得られた成形粒子
をコンベア式の連続乾燥機で乾燥したが、この際に、ネ
ット下及びその他で落下した、粒子径：２．５ｍｍ以下
の細粉の発生量は非常に少なく、０．８２％であり、こ
れらは、原材料に全量をフィードバックした。Thereafter, the molded particles thus obtained were dried by a conveyor type continuous dryer. At this time, fine powder having a particle diameter of 2.5 mm or less dropped under the net and other places. The amount was very low, 0.82%, which fed back the total amount to the raw material.
【００３０】さらに、この得られた成形乾燥粒子を、直
径１．８ｍ、長さ６０ｍのロータリーキルンに投入し、
１６００℃の温度で転動焼成した。なお、かかる整粒粒
子の焼成前（キルン投入前）の水分率は２．２％であっ
た。この焼成の後、篩別整粒したが、この際の２．５ｍ
ｍ以下の細粉は２．１５％であり、全工程を通じて非常
に高歩留りであった。Further, the obtained molded dry particles were put into a rotary kiln having a diameter of 1.8 m and a length of 60 m,
Rolling firing was performed at a temperature of 1600 ° C. The moisture content of the sized particles before firing (before charging the kiln) was 2.2%. After this firing, the particles were sieved and sized, but in this case 2.5 m
The fine powder of m or less was 2.15%, which was a very high yield throughout the entire process.
【００３１】一方、比較例として、上記の実施例と同じ
く、オーガーマシンで大型円柱状の成形品を成形した
後、この成形品をトンネルキルンにて１６００℃の温度
で焼成し、焼結成形品を得た。次いで、それを、一次破
砕：ジョークラッシャ→二次破砕：コーンクラッシャ→
三次破砕：インパクトブレーカーからなる、三段の破砕
工程を通すことにより、最終製品を得たが、破砕工程が
多く且つ成形品の緻密度が高いために、破砕時の２．５
ｍｍ以下の細粉発生が多く、１２．５％にも達し、歩留
りを非常に悪くした。On the other hand, as a comparative example, similarly to the above-mentioned embodiment, after molding a large columnar molded product with an auger machine, the molded product is fired at a temperature of 1600 ° C. in a tunnel kiln to obtain a sintered molded product. Got Then, primary crush: jaw crusher → secondary crush: cone crusher →
Tertiary crushing: The final product was obtained by passing through three stages of crushing process consisting of an impact breaker, but the number of crushing processes was high and the density of the molded product was high.
There were many fine powders of mm or less, reaching 12.5%, and the yield was very poor.
【００３２】また、骨材粒子形状を光学顕微鏡にて調べ
たところ、本発明に係る実施例の整粒粒子から得られた
骨材は、多稜型で、立方体に近く、一方比較例のもの
は、偏平、細長型の骨材が多いことを認めた。Further, when the aggregate particle shape was examined by an optical microscope, the aggregates obtained from the sized particles of the examples according to the present invention were multi-edge type and close to a cube, while those of the comparative example. Found that there were many flat and slender aggregates.
【００３３】さらに、上記で得られた２種の人工骨材に
ついて、その１３〜５ｍｍの粒度のものを対象として、
性状比較を行ない、その結果を、下記表３に示した。Further, regarding the two kinds of artificial aggregates obtained above, those having a particle size of 13 to 5 mm are targeted.
The properties were compared and the results are shown in Table 3 below.
【００３４】[0034]
【表３】 ＊見掛比重 ： ＪＩＳ Ａ１１１０に準拠して行なった。 ＊吸 水 率 ： ＪＩＳ Ａ１１１０に準拠して行なった。 ＊すり減り減量 ： ＪＩＳ Ａ１１２１に準拠して行なった。 ＊細長偏平量 ： 長短軸比３：１以上の細長偏平粒子の含有量％ ＊実 績 率 ： ＪＩＳ Ａ１１０４に準拠して行なった。[Table 3] * Apparent specific gravity: Measured according to JIS A1110. * Water absorption rate: Measured according to JIS A1110. * Abrasion and weight loss: Measured in accordance with JIS A1121. * Slender flatness amount: content% of slender flat particles having a long-to-short axis ratio of 3: 1 or more * Actual rate: Performed in accordance with JIS A1104.
【００３５】本発明に従う実施例の骨材では、立体的多
稜型の成形粒子を使用しているために、当然の結果とし
て、細長、偏平の骨材量は０％であるのに対し、比較例
の骨材では、砕石型を採用しているために、細長、偏平
量は４．８％となり、日本道路公団の基準値：２５％以
下というのに対して、その規格内ではあるが、比較的高
い結果となった。In the aggregate of the embodiment according to the present invention, since three-dimensional multi-edge shaped particles are used, the natural result is that the amount of the elongated and flat aggregate is 0%. Since the aggregate of the comparative example uses the crushed stone type, the slenderness and flatness are 4.8%, which is within the standard of the Japan Road Public Corporation standard value: 25% or less. , Relatively high results.
【００３６】また、偏平骨材が少ないものは、すり減り
減量も少ないので耐久性が高く、実績率も高くなる。こ
のために、コンクリート使用量、単位水量、アスファル
ト量を減少することが出来る。そして、セメント混合物
としての強度、耐久性能等も向上せしめられ、且つアス
ファルト混合物としても高強度低流動性となり、摩耗や
轍掘れ等も減少し、骨材性能が大幅に向上せしめられて
いると共に、高価なアスファルト、セメントの量を減少
せしめることが出来、非常に経済的である。Further, the one having a small amount of flat aggregate has a small wear amount and a small amount, so that the durability is high and the performance rate is also high. For this reason, the amount of concrete used, the amount of unit water, and the amount of asphalt can be reduced. And, strength as cement mixture, durability performance, etc. are also improved, and high strength and low fluidity also as an asphalt mixture, abrasion and rutting are reduced, and aggregate performance is greatly improved, The amount of expensive asphalt and cement can be reduced, which is very economical.
【００３７】[0037]
【発明の効果】以上の説明から明らかな如く、本発明に
従う道路用焼結人工骨材の製造方法によれば、稜角に富
んだ立方体に近い構造の粒子が多く、細長な、偏平な粒
子量を減少せしめた骨材が、高歩留りにて、生産性良
く、効果的に製造され得、以てアスファルト混合物の安
定性を増加し、轍掘れの低下、更にはすり減り減量の低
下、摩耗の減少等を図り得ることとなったのである。As is apparent from the above description, according to the method for producing a sintered artificial aggregate for a road according to the present invention, there are many particles having a structure close to a cube with abundant ridge angles, and a slender, flat particle amount. Aggregates with reduced yields can be produced efficiently with high yield and with high productivity, thus increasing the stability of the asphalt mixture, reducing rut digging, reducing abrasion loss, and reducing wear. And so on.
【図１】従来の人工骨材の製造工程の一例を示すフロー
チャートである。FIG. 1 is a flow chart showing an example of a conventional manufacturing process of an artificial aggregate.
【図２】本発明に従う人工骨材の製造工程の一例を示す
フローチャートである。FIG. 2 is a flow chart showing an example of a manufacturing process of an artificial aggregate according to the present invention.
【図３】本発明に従う成形粒子の形状を示す斜視説明図
であって、（ａ）及び（ｂ）はそれぞれ不等辺四角柱形
状の粒子及び不等辺五角柱形状の粒子を示している。FIG. 3 is a perspective explanatory view showing a shape of a shaped particle according to the present invention, wherein (a) and (b) respectively show an isosceles quadrangular prism-shaped particle and an isosceles pentagonal prism-shaped particle.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 安藤 宗夫 愛知県瀬戸市塩草町11番地の４ 内外セラ ミックス株式会社内 (72)発明者 塚田 豊彦 愛知県瀬戸市塩草町11番地の４ 内外セラ ミックス株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inoue Muneo 4 At 11 Shiogusa-cho, Seto City, Aichi Prefecture Uchiga Sera Mix Co., Ltd. (72) Inventor Toyohiko Tsukada 4 At 11 Shiogusa-cho, Seto City Aichi Prefecture Uchiga Sera Mix Within the corporation
Claims (3)
後、焼成後に目的とする粒子形状、粒度若しくは粒度分
布のものを与え得るように、所定形状の粒子として造粒
成形する第一の工程と、 該第一の工程において得られた成形粒子を、流動させる
ことなく、乾燥せしめる第二の工程と、 かかる乾燥された成形粒子を、ロータリーキルンの如き
回転型キルンに投入して、該回転型キルンにて転動、焼
成する第三の工程とを、含むことを特徴とする道路・建
材用焼結人工骨材の製造方法。1. A first step in which a raw material mineral or clay is pulverized and blended, and then granulated and molded into particles having a predetermined shape so that a desired particle shape, particle size or particle size distribution can be obtained after firing. A second step of drying the shaped particles obtained in the first step without flowing them, and introducing the dried shaped particles into a rotary kiln such as a rotary kiln to form a rotary kiln. A method for producing a sintered artificial aggregate for road / building material, comprising: a third step of rolling and firing.
記成形粒子の水分率が１２％以下となるまで、行なわれ
る請求項１に記載の道路・建材用焼結人工骨材の製造方
法。2. The method for producing a sintered artificial aggregate for road and building materials according to claim 1, wherein the drying operation in the second step is performed until the moisture content of the molded particles becomes 12% or less.
後、目的とする粒子形状、粒度若しくは粒度分布の焼成
粒子を与え得ない粒子を、原料として回収することを特
徴とする請求項１又は請求項２に記載の道路・建材用焼
結人工骨材の製造方法。3. The method according to claim 1, wherein in the second step, after the drying operation, particles which cannot give a fired particle having an intended particle shape, particle size or particle size distribution are recovered as a raw material. The method for producing a sintered artificial aggregate for road and building materials according to claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7017645A JP2886798B2 (en) | 1995-02-06 | 1995-02-06 | Manufacturing method of sintered artificial aggregate for road and building materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7017645A JP2886798B2 (en) | 1995-02-06 | 1995-02-06 | Manufacturing method of sintered artificial aggregate for road and building materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08208286A true JPH08208286A (en) | 1996-08-13 |
| JP2886798B2 JP2886798B2 (en) | 1999-04-26 |
Family
ID=11949600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7017645A Expired - Fee Related JP2886798B2 (en) | 1995-02-06 | 1995-02-06 | Manufacturing method of sintered artificial aggregate for road and building materials |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2886798B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS506630A (en) * | 1973-05-21 | 1975-01-23 | ||
| JPS5633340A (en) * | 1979-08-21 | 1981-04-03 | British Steel Corp | Device and method of continuously feeding strip |
-
1995
- 1995-02-06 JP JP7017645A patent/JP2886798B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS506630A (en) * | 1973-05-21 | 1975-01-23 | ||
| JPS5633340A (en) * | 1979-08-21 | 1981-04-03 | British Steel Corp | Device and method of continuously feeding strip |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2886798B2 (en) | 1999-04-26 |
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