JPH1179808A - Artificial aggregate and its production - Google Patents
Artificial aggregate and its productionInfo
- Publication number
- JPH1179808A JPH1179808A JP23718897A JP23718897A JPH1179808A JP H1179808 A JPH1179808 A JP H1179808A JP 23718897 A JP23718897 A JP 23718897A JP 23718897 A JP23718897 A JP 23718897A JP H1179808 A JPH1179808 A JP H1179808A
- Authority
- JP
- Japan
- Prior art keywords
- alumina
- coal ash
- silica
- aggregate
- flux
- 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.)
- Pending
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
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Civil Engineering (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、石炭灰を原料とし
て製造した、高強度、高比重且つ低吸水性の人工骨材に
関する。本発明の方法で製造された人工骨材は、普通コ
ンクリート製品を製造する際に、天然骨材の代替として
使用される。The present invention relates to a high-strength, high-specific-gravity, low-water-absorbing artificial aggregate produced from coal ash. The artificial aggregate produced by the method of the present invention is used as a substitute for natural aggregate in producing ordinary concrete products.
【０００２】[0002]
【従来の技術】コンクリート製品の製造には骨材の使用
は欠かせないものである。従来、骨材としては天然物が
使用されてきたが、永年の使用に伴う資源の枯渇に加
え、環境保護上の理由から採掘が制限されることが多く
なり、品不足、品質低下が問題となり、代替品の開発が
要求されている。一方、火力発電所、各種工場における
燃料としての石炭の利用が進んでいるが、そこから大量
に排出される石炭灰についてはその有効利用が思うよう
に進まないため、その蓄積が問題となり、それを大量に
使用する有効利用法の開発が強く望まれている。これ等
二つの問題を一挙に解決する手段として、石炭灰を使用
する人工骨材の開発研究が進められており既に多くの技
術が開示されている。しかし、そのほとんどが加熱発泡
による低密度体の生成を利用した軽量コンクリート用の
人工軽量骨材であり、需要がそれより遙かに大きい普通
コンクリート用の人工骨材を目的としたものは非常に少
ない。普通コンクリート用の人工骨材が実用性を有する
ためには、絶乾比重が２．０以上、２４時間吸水率が３
％以下であることが要求されるが、石炭灰を主原料とし
てこの特性を有する骨材の製造が困難であることがその
原因である。それを可能にした例として、特開平７−２
０６４９１号公報には、粒径を調整した石炭灰を使用す
る人工骨材の製造方法が開示されている。この方法で
は、石炭灰の種に因らず上記特性を満足する骨材の製造
が可能であるが、粉砕・分級操作が必要であるだけでな
く、粒度分布の異なる粉体の混合により焼成前造粒物の
緻密化を図ることを骨子としているため、粉砕に加えて
複雑な分級操作が必要であるだけでなく、粉体に要求さ
れる粒度分布条件が複雑であり、結果として使用可能な
適性範囲が狭く調整が困難である欠点を有する。また、
粒度分布を調整した石炭灰は加熱による発泡が顕著であ
り、実用的な特性を有する人工骨材を与える適性焼成温
度領域が狭く、安定製造が困難であると云う欠点を有し
たものであった。2. Description of the Related Art The use of aggregates is essential for the production of concrete products. Conventionally, natural materials have been used as aggregates.However, in addition to depletion of resources due to long-term use, mining is often restricted for environmental protection reasons, and shortages and quality deterioration are problems. Development of alternative products is required. On the other hand, coal is being used as fuel in thermal power plants and various factories, but coal ash, which is discharged in large quantities from it, does not proceed as intended, and its accumulation becomes a problem. There is a strong demand for the development of an effective utilization method that uses a large amount of. As a means of solving these two problems at once, research and development of artificial aggregates using coal ash have been advanced, and many techniques have already been disclosed. However, most of them are artificial lightweight aggregates for lightweight concrete utilizing the generation of low-density bodies by heating and foaming. Few. In order for artificial aggregate for ordinary concrete to have practicality, the absolute dry specific gravity is 2.0 or more and the water absorption rate for 24 hours is 3
% Or less, which is because it is difficult to produce aggregates having this property using coal ash as a main raw material. Japanese Patent Application Laid-Open No. Hei 7-2
Japanese Patent Publication No. 064491 discloses a method for producing an artificial aggregate using coal ash whose particle size is adjusted. According to this method, it is possible to produce an aggregate satisfying the above characteristics irrespective of the type of coal ash.However, not only the pulverization and classification operations are required, but also the pre-calcination by mixing powder having different particle size distributions. Since the main point is to achieve the densification of the granulated material, not only a complicated classification operation is required in addition to pulverization, but also the particle size distribution conditions required for the powder are complicated, and as a result it can be used. It has the drawback that the suitability range is narrow and adjustment is difficult. Also,
Coal ash whose particle size distribution was adjusted had the drawback that foaming due to heating was remarkable, the suitable firing temperature range for providing artificial aggregates having practical characteristics was narrow, and stable production was difficult. .
【０００３】[0003]
【発明が解決しようとする課題】本発明は、石炭灰を主
原料とし、実用的な特性を有する人工骨材およびその製
造方法の提供を目的とする。具体的には、石炭灰の種類
によらず、絶乾比重２．０以上且つ２４時間吸水率３％
以下の特性を有する骨材およびそれを容易且つ安定的に
製造できる製造方法の提供を目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide an artificial aggregate using coal ash as a main raw material and having practical characteristics and a method for producing the same. Specifically, regardless of the type of coal ash, the absolute dry specific gravity is 2.0 or more and the 24-hour water absorption is 3%.
An object of the present invention is to provide an aggregate having the following characteristics and a manufacturing method capable of easily and stably manufacturing the aggregate.
【０００４】[0004]
【課題を解決するための手段】発明者等は、未処理の石
炭灰に必要に応じてアルミナ源またはフラックス分を添
加し、アルミナ／シリカ比およびフラックス量をコント
ロールすることにより、目標とする特性の骨材を与える
焼成温度が広く、目標特性を満足する骨材が安定的に得
られることを見出し本発明を完成した。すなわち、本発
明は、アルミナ／シリカ比が０．６以上且つフラックス
量が６重量％以上となるように調整した石炭灰に水を加
えて造粒した後焼成することを特徴とする人工骨材の製
造方法および該方法で製造された人工骨材に関する。以
下、本発明を詳しく説明する。Means for Solving the Problems The present inventors add an alumina source or a flux component to untreated coal ash as necessary, and control the alumina / silica ratio and the amount of flux to achieve the desired characteristics. The present inventors have found that the sintering temperature for providing the aggregate is wide and that the aggregate satisfying the target characteristics can be stably obtained. That is, the present invention provides an artificial aggregate characterized in that coal ash adjusted to have an alumina / silica ratio of 0.6 or more and a flux amount of 6% by weight or more is granulated by adding water, and then fired. And an artificial aggregate produced by the method. Hereinafter, the present invention will be described in detail.
【０００５】[0005]
【発明の実施の形態】石炭灰は、燃焼に用いた石炭の種
類により特性が異なり、それを用いて製造した骨材の特
性が大きく変化する。例えば、成分調整を行なっていな
い１２種の石炭灰のアルミナ／シリカ比およびフラック
ス量は、図１に示すようにばらついている。図１中の
Ａ、Ｂ、Ｃ三種の石炭灰について、成分未調整のままで
温度を変えて焼成したときに得られた骨材の絶乾比重お
よび２４時間吸水率を図２に示す。骨材特性の温度依存
性は石炭灰によって大きく異なっていることが分かる。
このことが石炭灰を用いて一定の品質の骨材を製造する
ことを困難なものとしている。DESCRIPTION OF THE PREFERRED EMBODIMENTS The characteristics of coal ash vary depending on the type of coal used for combustion, and the characteristics of aggregates produced using the coal vary greatly. For example, the alumina / silica ratio and the flux amount of twelve types of coal ash not subjected to component adjustment vary as shown in FIG. FIG. 2 shows the absolute dry gravity and the 24-hour water absorption of the aggregate obtained when the three types of coal ash A, B, and C in FIG. 1 were fired while changing the temperature without adjusting the components. It can be seen that the temperature dependence of the aggregate properties differs greatly depending on the coal ash.
This makes it difficult to produce aggregate of constant quality using coal ash.
【０００６】石炭灰の主成分はアルミナとシリカであ
り、フラックス分として鉄、カルシウム、マグネシウ
ム、ナトリウム、カリウム等の金属の酸化物を含み、そ
の常温における構成はガラス相と石英、ムライト等の結
晶相である。従って、石炭灰は常温では非平衡状態にあ
る固体であるが、加熱により軟化するまたは融液を生成
する温度領域では、アルミナ−シリカ−フラックス系の
平衡状態に準じた状態になると考えられる。石炭灰の特
性を決める要因は色々あるが、発明者等は、軟化または
融液を生成する温度領域では、アルミナ−シリカ−フラ
ックス系の平衡状態に影響を与えると考えられる、石炭
灰中のアルミナ／シリカ比およびフラックス量が、得ら
れる骨材の特性に大きな影響を与える要因であることを
見出し、これ等の値が特定の範囲内にあるように成分を
調整すれば、石炭灰の種類によらず実用的な特性を有す
る人工骨材の安定的な製造が可能であることを確かめ、
本発明を完成した。[0006] The main components of coal ash are alumina and silica, which contain, as a flux component, oxides of metals such as iron, calcium, magnesium, sodium, and potassium. The composition at room temperature is a glass phase and crystals such as quartz and mullite. Phase. Therefore, it is considered that coal ash is a solid in a non-equilibrium state at room temperature, but in a temperature region where it is softened by heating or generates a melt, a state similar to the equilibrium state of the alumina-silica-flux system is considered. Although there are various factors that determine the characteristics of coal ash, the inventors have found that alumina in silica ash is considered to affect the equilibrium state of the alumina-silica-flux system in the temperature range where softening or melt formation occurs. / Silica ratio and the amount of flux are found to be factors that greatly affect the properties of the obtained aggregate. If the components are adjusted so that these values fall within a specific range, the type of coal ash It was confirmed that stable production of artificial aggregate with practical properties was possible,
The present invention has been completed.
【０００７】本発明では、成形前の石炭灰粉末に、アル
ミナ／シリカの重量比が０．６以上であり且つフラック
ス量が全体の６重量％以上になるように、必要成分を加
えて成分調整を行なうことを最大の特徴とする。石炭灰
中のアルミナ／シリカの重量比は石炭灰種によって０．
２〜０．８の範囲で変動するが、この値が０．６より小
である石炭灰については、アルミナを含む物質をアルミ
ナ源として添加し、アルミナ／シリカ比が０．６以上に
なるように調整する。本発明では、アルミナ／シリカ比
に関する限りその値を０．６以上に調整すれば良いが、
アルミナ源の添加量を大きくし、徒らにこの値を大きく
するのはコスト高に繋がり好ましくない。本発明では、
アルミナ／シリカ重量比が０．６〜１．０の範囲になる
ようにするのが良い。In the present invention, the necessary components are added to the coal ash powder before molding so that the weight ratio of alumina / silica is 0.6 or more and the amount of flux is 6% by weight or more. The main feature is to perform The weight ratio of alumina / silica in the coal ash depends on the type of coal ash.
For coal ash in which the value fluctuates in the range of 2 to 0.8, but this value is smaller than 0.6, a substance containing alumina is added as an alumina source so that the alumina / silica ratio becomes 0.6 or more. Adjust to In the present invention, the value may be adjusted to 0.6 or more as far as the alumina / silica ratio is concerned.
It is not preferable to increase the amount of the alumina source to be added, and to increase this value, because it increases the cost. In the present invention,
It is preferable that the alumina / silica weight ratio is in the range of 0.6 to 1.0.
【０００８】石炭灰中のアルミナ／シリカ比の調整は、
原料石炭灰中におけるアルミナ／シリカ比の分析値を基
本として、必要に応じてアルミナ源またはシリカ源を添
加して行なうことになるが、上述のように、一般の石炭
灰ではアルミナ成分よりシリカ成分の方が多く、アルミ
ナ源を添加する場合がほとんどである。本発明で使用さ
れるアルミナ源としては例えばレアアルミナ、水酸化ア
ルミニウム、ボーキサイト、長石、カオリナイト、およ
びアルミナ／シリカ比の大きい他の石炭灰等を挙げるこ
とが出来る。一方、シリカ源としては珪石粉、ミクロシ
リカ、石英砂、砂岩、珪藻土等を挙げることが出来る。The adjustment of the alumina / silica ratio in coal ash is as follows:
Based on the analysis value of the alumina / silica ratio in the raw coal ash, it is necessary to add an alumina source or a silica source as necessary. In most cases, and in most cases, an alumina source is added. Examples of the alumina source used in the present invention include rare alumina, aluminum hydroxide, bauxite, feldspar, kaolinite, and other coal ash having a large alumina / silica ratio. On the other hand, examples of the silica source include silica powder, microsilica, quartz sand, sandstone, and diatomaceous earth.
【０００９】一方、石炭灰中のフラックス量は石炭灰に
よって４〜３０重量％の範囲で変化するが、図１に示す
様に、多くの石炭灰において本願発明の範囲である６重
量％以上の範囲に入っていることから、フラックスの添
加は必要でない場合が多いが、フラックス量が６重量％
より少ない石炭灰について、およびアルミナ源の添加に
よりフラックス量が６重量％より少なくなった場合に
は、フラックスを添加し、フラックス量が６重量％以上
となるように調整する必要がある。本発明においては、
フラックス量に関する限り、６重量％以上であれば目標
特性を有する骨材を得ることが出来るが、フラックス量
を増す事により絶乾比重、２４時間吸水率は更に改善さ
れ、特に圧潰強度は大きく改善され好ましい結果を与え
る。しかし、徒らに大きくしても、コスト高に繋がるだ
けでなく、石炭灰によっては発泡し易くなるため、成分
調整後石炭灰におけるフラックス量は６〜３０重量％と
するのが良い。On the other hand, the amount of flux in the coal ash varies in the range of 4 to 30% by weight depending on the coal ash, but as shown in FIG. In many cases, the addition of flux is not necessary, but the amount of flux is 6% by weight.
For a smaller amount of coal ash, and when the amount of flux is less than 6% by weight due to the addition of the alumina source, it is necessary to add a flux and adjust the amount of flux to 6% by weight or more. In the present invention,
As far as the amount of flux is concerned, aggregates having the target properties can be obtained if the amount is 6% by weight or more, but the absolute gravity and the 24-hour water absorption are further improved by increasing the amount of flux, and especially the crushing strength is greatly improved. And give favorable results. However, even if the size is unnecessarily large, it not only leads to an increase in cost but also facilitates foaming depending on the coal ash. Therefore, the flux amount in the coal ash after the component adjustment is preferably set to 6 to 30% by weight.
【００１０】本発明において、新たに添加可能なフラッ
クス成分としては、粘土、高炉スラグ、パーライト製造
時のコットレルダスト、ＦＣＣプロセスからの廃触媒で
あるゼオライト等を挙げることが出来る。尚、アルミナ
源またはシリカ源の添加によりフラックス成分の濃度も
変化し、また、一般にフラックス成分はアルミナおよび
シリカの双方を含んでいることから、フラックス成分の
添加により、シリカ／アルミナ比も変化する。従って、
成分調整に当たっては、シリカ／アルミナ比およびフラ
ックス量の双方が所定の範囲に入るように留意する必要
があるが、それは容易に行なうことが出来る。また、石
炭灰の成分調整は、石炭灰に必要量のアルミナ源または
シリカ源、及びフラックスの必要量を添加した後、ミキ
サー等公知の粉体撹拌手段を用いて行なうことが出来
る。In the present invention, examples of the flux component which can be newly added include clay, blast furnace slag, cotrel dust during pearlite production, zeolite which is a waste catalyst from the FCC process, and the like. The addition of the alumina source or the silica source also changes the concentration of the flux component, and since the flux component generally contains both alumina and silica, the addition of the flux component also changes the silica / alumina ratio. Therefore,
In adjusting the components, it is necessary to take care that both the silica / alumina ratio and the flux amount fall within predetermined ranges, but this can be easily performed. Further, the components of the coal ash can be adjusted by adding a required amount of an alumina source or a silica source and a required amount of a flux to the coal ash and then using a known powder stirring means such as a mixer.
【００１１】石炭灰の粒径は大きな要因ではなく、２０
００〜５０００ｃｍ2 ／ｇのブレーン比表面積を有する
通常の石炭灰を、粉砕・分級等面倒な処理を施すことな
く使用できる。一方、成分調整材であるアルミナ源、シ
リカ源、およびフラックスについては、石炭灰との混合
性を上げ偏析を避けるために、２０００〜７０００ｃｍ
2 ／ｇのブレーン比表面積を有するものを使用する方が
望ましい。The particle size of coal ash is not a major factor.
Normal coal ash having a Blaine specific surface area of 00 to 5000 cm 2 / g can be used without performing complicated processing such as pulverization and classification. On the other hand, the alumina source, the silica source, and the flux, which are the component adjusting materials, are 2,000-7000 cm in order to increase the mixing property with coal ash and avoid segregation.
It is preferable to use one having a Blaine specific surface area of 2 / g.
【００１２】成分調整後の粉末は焼成に先立ち成形する
が、成形方法はパン造粒、圧縮成形、押し出し成形等の
公知の方法の何れもが問題なく使用可能であるが、中で
もパン造粒機を用いる方法が、粒径コントロールの容易
さおよびコスト面から最も好ましい成形法である。成形
に当たって、水ガラス、粘土、ベントナイト等の無機系
またはセルロース、ポリビニルアルコール、デキストリ
ン、パルプ廃液等の有機系バインダーを添加しても何等
差し支えないまた、成形体の形状、粒径は骨材の使用目
的に応じて調整することになるが、最も一般的に用いら
れるのは、粒径５〜２０ｍｍの球形の骨材である。The powder after component adjustment is molded prior to firing, and any molding method such as bread granulation, compression molding and extrusion molding can be used without any problem. Is the most preferable molding method from the viewpoint of easy control of particle size and cost. In molding, it does not matter what kind of inorganic binder such as water glass, clay, bentonite or organic binder such as cellulose, polyvinyl alcohol, dextrin, pulp waste liquid, etc. is added. The most commonly used is a spherical aggregate having a particle size of 5 to 20 mm, which will be adjusted according to the purpose.
【００１３】成形体はそのままで、または乾燥した後焼
成する。焼成温度は、アルミナ／シリカ比およびフラッ
クス量に依存して１１００〜１４５０℃の間で変化する
が、成分調整後のアルミナ／シリカ比およびフラックス
量が本発明の範囲にある石炭灰では、何れも目標特性を
満足する人工骨材を得ることが出来る。The compact is fired as it is or after drying. The firing temperature varies between 1100 and 1450 ° C. depending on the alumina / silica ratio and the amount of flux. However, in the case of coal ash whose alumina / silica ratio and the amount of flux after component adjustment are within the range of the present invention, any of them is used. An artificial aggregate satisfying the target characteristics can be obtained.
【００１４】以下に具体例を示して、本発明を更に詳し
く説明する。Hereinafter, the present invention will be described in more detail with reference to specific examples.
実施例１〜６および比較例１〜５ （１）原料 石炭灰 ：表１に示す組成、ブレーン比表面積を有す
るＡ、Ｂ、Ｃ３種の石炭灰を使用した。 成分調整材：アルミナ添加にはレアアルミナ、シリカ添
加には珪石粉を使用して、アルミナ／シリカ比を所定の
値に調整した。何れもその成分を表１に示す。 融点降下材：表１にその組成を示す、姫島産粘土または
高炉スラグを添加し、フラックス量を調整を行なった。 （２）粉体成分調整および成型 石炭灰に所定量の成分調整材および必要に応じてフラッ
クスを添加・撹拌して粉体の成分調整を行なった後、そ
の合量１００重量部に水１５重量部を添加しながらパン
造粒機で粒径２．５〜２０ｍｍの球状成型体に成型し
た。成分調整後の粉体組成を表２に示す。 （３）焼成 成型体は乾燥することなく、電気炉中で１１５０〜１４
５０℃の温度範囲で焼成し、骨材を得た。 （４）特性評価 得られた骨材については、次の方法で、絶乾比重、２４
時間吸水率および圧潰強度を測定し、特性評価を行なっ
た。測定値を表３および図２、図３に示す。 絶乾比重：ＪＩＳ Ａ １１３５に準拠して測定。 ２４時間吸水率：ＪＩＳ Ａ １１３５に準拠して測
定。 圧潰強度：試料台に乗せた骨材に上から荷重を加え、骨
材が崩壊するときの過重を測定した。測定値は１０個の
試料について測定を行ない、その平均値で示す。Examples 1 to 6 and Comparative Examples 1 to 5 (1) Raw material coal ash: Three types of coal ash having the composition shown in Table 1, A, B, and C having a Blaine specific surface area were used. Component adjusting material: Rare alumina was used for adding alumina, and silica powder was used for adding silica, and the alumina / silica ratio was adjusted to a predetermined value. The components are shown in Table 1. Melting point lowering material: Himeshima clay or blast furnace slag whose composition is shown in Table 1 was added to adjust the amount of flux. (2) Powder component adjustment and molding A predetermined amount of a component adjusting material and, if necessary, a flux are added to the coal ash, followed by stirring to adjust the components of the powder. The mixture was molded into a spherical molded body having a particle size of 2.5 to 20 mm with a pan granulator while adding the parts. Table 2 shows the powder composition after the component adjustment. (3) Firing The molded body is dried in an electric furnace in an electric furnace without drying.
Firing was performed in a temperature range of 50 ° C. to obtain an aggregate. (4) Characteristic evaluation The obtained aggregate was measured for absolute dry weight and 24
The water absorption over time and the crushing strength were measured, and the characteristics were evaluated. The measured values are shown in Table 3 and FIGS. Absolute dry specific gravity: measured according to JIS A 1135. 24 hour water absorption: Measured according to JIS A 1135. Crushing strength: A load was applied to the aggregate placed on the sample table from above, and the excess weight when the aggregate collapsed was measured. The measured values are measured for 10 samples, and the average value is shown.
【００１５】[0015]
【表１】 [Table 1]
【００１６】[0016]
【表２】 [Table 2]
【００１７】[0017]
【表３】 [Table 3]
【００１８】実施例１〜６は組成的に本願発明の請求範
囲に入るものであるが、何れも実用的な骨材が具備すべ
き特性である、絶乾比重２．０以上、２４時間吸水率３
％以上を満足するものが得られている。強度的にも１５
０（ｋｇｆ）以上の圧潰強度を有しており、申し分のな
いものが得られている。それに対し、アルミナ／シリカ
比またはフラッツクス量のどちらか一方が本願発明の範
囲を外れている比較例１〜５では、絶乾比重または２４
時間吸水率のどちらか一方の特性が実用的な骨材が具備
すべき値に達していないだけでなく、強度的にも低く、
実用的な骨材を与えないことが分かる。Examples 1 to 6 fall within the scope of the present invention in terms of composition. However, all of the characteristics that practical aggregates should have are: absolute dry gravity of 2.0 or more, and water absorption for 24 hours. Rate 3
% Is obtained. 15 in strength
It has a crushing strength of 0 (kgf) or more, and a satisfactory product is obtained. On the other hand, in Comparative Examples 1 to 5 in which either the alumina / silica ratio or the flux amount is out of the range of the present invention, the absolute dry specific gravity or 24
Not only one of the properties of time water absorption does not reach the value that practical aggregate should have, but also the strength is low,
It turns out that it does not give practical aggregate.
【００１９】また、図３は、図２中の石炭灰Ａについて
成分調整を行なったものについての焼成温度と骨材特性
との関係を示す図である。図２と比較して、成分調整後
の石炭灰が目標特性値を与えるだけでなく、その特性値
を有する骨材を与える温度範囲が広いことが分かる。FIG. 3 is a graph showing the relationship between the sintering temperature and the aggregate properties of the coal ash A in FIG. 2 in which the components are adjusted. Compared to FIG. 2, it can be seen that the temperature range in which the coal ash after the component adjustment not only gives the target characteristic value but also gives the aggregate having the characteristic value is wide.
【００２０】[0020]
【発明の効果】本発明によれば、石炭灰の組成に応じて
アルミナ／シリカ比およびフラックス量を調整する簡便
な方法により、普通コンクリート用として実用的な特性
を有する人工骨材を製造することが出来る。また、目的
特性を有する骨材を与える焼成温度域が広く、安定製造
も可能である。骨材不足を解決するのみならず、蓄積が
問題となっている石炭灰の有効利用にも繋がり、その産
業面での価値は大きい。According to the present invention, an artificial aggregate having practical properties for ordinary concrete is manufactured by a simple method of adjusting the alumina / silica ratio and the amount of flux according to the composition of coal ash. Can be done. Further, the baking temperature range for providing the aggregate having the desired characteristics is wide, and stable production is possible. In addition to solving the shortage of aggregate, it also leads to the effective use of coal ash, which is a problem of accumulation, and its industrial value is great.
【図１】１２種の石炭灰について、アルミナ／シリカ比
とフラックス量の関係を示す図である。FIG. 1 is a diagram showing the relationship between the alumina / silica ratio and the flux amount for 12 types of coal ash.
【図２】成分未調整の石炭灰成形体の加熱特性例を示す
図である。FIG. 2 is a diagram showing an example of heating characteristics of a coal ash molded body whose components have not been adjusted.
【図３】成分調整を行なった石炭灰成形体の加熱特性例
を示す図である。FIG. 3 is a diagram showing an example of the heating characteristics of a coal ash compact after component adjustment.
Claims (4)
フラックス量が６〜３０重量％となるように調整した石
炭灰を成形した後焼成することを特徴とする人工骨材の
製造方法。An alumina / silica ratio of 0.6 to 1.00,
A method for producing an artificial aggregate, comprising forming coal ash adjusted to have a flux amount of 6 to 30% by weight and then firing.
０００ｃｍ2 ／ｇである、請求項１に記載の人工骨材の
製造方法。2. The coal ash has a brane specific surface area of 2,000 to 5,000.
The method for producing an artificial aggregate according to claim 1, which is 000 cm 2 / g.
フラックス量が６〜３０重量％となるように調整した石
炭灰を成形した後焼成して製造した人工骨材。3. An alumina / silica ratio of 0.6 to 1.00,
An artificial aggregate produced by molding coal ash adjusted to have a flux amount of 6 to 30% by weight and then firing.
０００ｃｍ2 ／ｇである、請求項３に記載の人工骨材。4. The coal ash has a brane specific surface area of 2,000 to 5,000.
000cm is 2 / g, an artificial bone material according to claim 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23718897A JPH1179808A (en) | 1997-09-02 | 1997-09-02 | Artificial aggregate and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23718897A JPH1179808A (en) | 1997-09-02 | 1997-09-02 | Artificial aggregate and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1179808A true JPH1179808A (en) | 1999-03-23 |
Family
ID=17011687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23718897A Pending JPH1179808A (en) | 1997-09-02 | 1997-09-02 | Artificial aggregate and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1179808A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020065190A (en) * | 2001-02-06 | 2002-08-13 | 정한주 | Process for producing bricks using coal ash |
| RU2470883C1 (en) * | 2011-08-31 | 2012-12-27 | Юлия Алексеевна Щепочкина | Mixture for producing porous aggregate |
| RU2472726C1 (en) * | 2011-08-31 | 2013-01-20 | Юлия Алексеевна Щепочкина | Mixture for producing porous aggregate |
| RU2474540C1 (en) * | 2011-11-01 | 2013-02-10 | Юлия Алексеевна Щепочкина | Mixture for making enamel coating |
| JP5186610B1 (en) * | 2012-05-23 | 2013-04-17 | 太平洋セメント株式会社 | Fired product |
| CN107417150A (en) * | 2017-09-04 | 2017-12-01 | 广东清大同科环保技术有限公司 | A kind of high-strength light high-content fly ash haydite and preparation method thereof |
| CN107731492A (en) * | 2016-07-30 | 2018-02-23 | 罗杰 | A kind of power transformer |
| CN108975867A (en) * | 2018-08-10 | 2018-12-11 | 河南弘盛再生资源利用有限公司 | The formula and preparation method of diatomite composite material based on oil-containing waste diatomite |
| CN113684076A (en) * | 2021-08-23 | 2021-11-23 | 彭岩 | Auxiliary agent for increasing melting temperature of coal ash and preparation device thereof |
| CN114235546A (en) * | 2021-12-14 | 2022-03-25 | 清远南玻节能新材料有限公司 | Silica sand composite fluxing agent and detection method of silica sand |
-
1997
- 1997-09-02 JP JP23718897A patent/JPH1179808A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020065190A (en) * | 2001-02-06 | 2002-08-13 | 정한주 | Process for producing bricks using coal ash |
| RU2470883C1 (en) * | 2011-08-31 | 2012-12-27 | Юлия Алексеевна Щепочкина | Mixture for producing porous aggregate |
| RU2472726C1 (en) * | 2011-08-31 | 2013-01-20 | Юлия Алексеевна Щепочкина | Mixture for producing porous aggregate |
| RU2474540C1 (en) * | 2011-11-01 | 2013-02-10 | Юлия Алексеевна Щепочкина | Mixture for making enamel coating |
| JP5186610B1 (en) * | 2012-05-23 | 2013-04-17 | 太平洋セメント株式会社 | Fired product |
| CN107731492A (en) * | 2016-07-30 | 2018-02-23 | 罗杰 | A kind of power transformer |
| CN107731492B (en) * | 2016-07-30 | 2019-01-18 | 宁波甬嘉变压器有限公司 | A kind of power transformer |
| CN107417150A (en) * | 2017-09-04 | 2017-12-01 | 广东清大同科环保技术有限公司 | A kind of high-strength light high-content fly ash haydite and preparation method thereof |
| CN108975867A (en) * | 2018-08-10 | 2018-12-11 | 河南弘盛再生资源利用有限公司 | The formula and preparation method of diatomite composite material based on oil-containing waste diatomite |
| CN113684076A (en) * | 2021-08-23 | 2021-11-23 | 彭岩 | Auxiliary agent for increasing melting temperature of coal ash and preparation device thereof |
| CN114235546A (en) * | 2021-12-14 | 2022-03-25 | 清远南玻节能新材料有限公司 | Silica sand composite fluxing agent and detection method of silica sand |
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