JP2009221088A - Artificial lightweight aggregate using mixture of diatomaceous earth and garbage molten slag - Google Patents

Artificial lightweight aggregate using mixture of diatomaceous earth and garbage molten slag Download PDF

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JP2009221088A
JP2009221088A JP2008070566A JP2008070566A JP2009221088A JP 2009221088 A JP2009221088 A JP 2009221088A JP 2008070566 A JP2008070566 A JP 2008070566A JP 2008070566 A JP2008070566 A JP 2008070566A JP 2009221088 A JP2009221088 A JP 2009221088A
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molten slag
diatomaceous earth
lightweight aggregate
artificial lightweight
weight
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JP4214214B1 (en
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Masami Tsushima
雅己 対馬
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Institute of National Colleges of Technologies Japan
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    • 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
    • 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
    • C04B18/027—Lightweight 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

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Abstract

<P>PROBLEM TO BE SOLVED: To provide an artificial lightweight aggregate using a mixture of diatomaceous earth and garbage molten slag by utilizing the garbage molten slag obtained by crushing molten matter discharged from melting facilities for municipal solid waste. <P>SOLUTION: The artificial lightweight aggregate of a 5-20 mm spherical shape is manufactured by the steps of: pulverizing diatomaceous earth into a 50 μm or less particle size; pulverizing garbage molten slag into a 250 μm or less particle size; mixing the pulverized diatomaceous earth and the pulverized garbage molten slag with a blend ratio of 75 wt.%:25 wt.%; mixing 2-10 wt.% of cement as a stabilizing material to the mixture of the blend ratio; mixing and kneading these with a fixed amount of water; molding the mix-kneaded material into a predetermined spherical shape by a spherical molding press device; curing the molded matter for a fixed period (28 days); and firing the cured matter at a high temperature of 1,200°C for 40-100 minutes. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、都市ゴミの溶融施設から排出される溶融物を粉砕したゴミ溶融スラグを利用した、珪藻土とゴミ溶融スラグの混合による人工軽量骨材に関する。   TECHNICAL FIELD The present invention relates to an artificial lightweight aggregate obtained by mixing diatomaceous earth and waste molten slag using waste molten slag obtained by pulverizing a melt discharged from a municipal waste melting facility.

秋田県内から産出される珪藻土は、品質も良く多方面に使用されているが、地場産業の活性化の観点から見ると未だ不十分であり、更なる市場の開拓に乗り出す必要性に迫られている。
また、ゴミ溶融スラグは、秋田市の一般家庭ゴミや事業所のゴミを１８００℃〜１９００℃の高温で溶融し、再資源化したもので、年間約１３，７００〜１５，２６０ｔ排出されるが、このうち資源として再利用される量は、主にコンクリートの二次製品など、年間１，０００ｔ程度であり、他の用途として用いられることはほぼ皆無の状態である。
従来、都市ゴミの溶融施設から排出される溶融物を粉砕したゴミ溶融スラグを利用した、微粉砕したゴミ溶融スラグと消石灰の混合による路盤改良材が知られている（特許文献１を参照）。
この公知技術では、都市ゴミの溶融施設から排出される溶融物を急冷凝固した後、微粉砕した粒径４２５〜１０μｍの範囲のゴミ溶融スラグ５０重量％と土材料５０重量％とからなる混合土に消石灰５〜１５重量％添加した路盤改良材である。
その他に、石炭灰を主原料として用い、特に軽量性・安定性に優れた人工骨材を提供する人工軽量骨材用塑性物及び人工軽量骨材の製造方法（特許文献２を参照）、都市ごみの焼却時に生じる飛灰に粘結材としてベントナイトと酸化鉄及び炭化水素の発泡剤とを混合し、焼成して人工軽量骨材を製造する人工軽量骨材の製造方法（特許文献３を参照）やごみ焼却灰に、粘結剤、発泡剤、還元剤と、さらに粗成制御剤としてシリカまたはアルミナを混合して成型し、これを焼成することによって人工軽量骨材を製造する人工骨材の製造方法及びこの方法で得られた人工軽量骨材（特許文献４を参照）が知られている。
しかしこれらは、コンクリートに使用される軽量骨材の品質、とりわけ軽量粗骨材（粒径５ｍｍ以上）は、吸水率が大きいほど骨材自身の膨張が生じ、結果としてコンクリートの劣化が問題となる。
特許第３９３６９９２号公報 特開平７−１８７７４０号公報 特開平１０−４５４４８号公報 特開２０００−１７８０８４号公報 Diatomaceous earth produced from within Akita Prefecture has good quality and is used in many fields, but it is still insufficient from the viewpoint of revitalizing local industries, and there is a need to embark on further market development. Yes.
Moreover, refuse melting slag is made by melting ordinary household waste in Akita City and business office waste at a high temperature of 1800 ° C to 1900 ° C and recycling them, and is discharged about 13,700-15,260 tons per year. Of these, the amount reused as a resource is about 1,000 tons per year, mainly for secondary products of concrete, and is almost never used for other purposes.
Conventionally, a roadbed improvement material using a mixture of finely pulverized waste molten slag and slaked lime using a molten slag obtained by pulverizing a melt discharged from a municipal waste melting facility is known (see Patent Document 1).
In this known technique, a melt discharged from a municipal waste melting facility is rapidly cooled and solidified, and then mixed ground consisting of 50% by weight of waste molten slag having a particle size of 425 to 10 μm and 50% by weight of soil material. It is a roadbed improvement material which added 5 to 15% by weight of slaked lime.
In addition, plastic materials for artificial lightweight aggregates that use coal ash as the main raw material and provide artificial aggregates that are particularly lightweight and stable, and methods for producing artificial lightweight aggregates (see Patent Document 2), cities Artificial lightweight aggregate manufacturing method in which bentonite, iron oxide, and hydrocarbon foaming agent are mixed with fly ash generated during incineration of garbage and fired to produce artificial lightweight aggregate (see Patent Document 3) ) Artificial aggregates that produce artificial lightweight aggregates by mixing and molding binders, foaming agents, reducing agents, and silica or alumina as a coarseness control agent, and firing them. And an artificial lightweight aggregate obtained by this method (see Patent Document 4) are known.
However, these are the quality of lightweight aggregates used in concrete, especially lightweight coarse aggregates (particle size of 5 mm or more), the larger the water absorption, the more the aggregate itself expands, resulting in a problem of deterioration of the concrete. .
Japanese Patent No. 3936992 JP-A-7-187740 Japanese Patent Laid-Open No. 10-45448 JP 2000-178084 A

本発明は、都市ゴミの溶融施設から排出される溶融物を粉砕したゴミ溶融スラグを利用した、珪藻土とゴミ溶融スラグの混合による人工軽量骨材を提供することを目的とする。   An object of the present invention is to provide an artificial lightweight aggregate by mixing diatomaceous earth and waste molten slag using waste molten slag obtained by pulverizing a melt discharged from a municipal waste melting facility.

本発明の珪藻土とゴミ溶融スラグの混合による人工軽量骨材の製造方法は、珪藻土とゴミ溶融スラグを微粉砕し、これらにセメントを安定材として添加し、一定の水量のもとで練り混ぜ、この混練材料を球状成形型加圧装置に入れて球状にし、一定期間養生後、焼成して人工的な軽量骨材とするものである。
本発明の珪藻土とゴミ溶融スラグの混合による人工軽量骨材は、微粉砕した珪藻土７５重量％と微粉砕したゴミ溶融スラグ２５重量％の配合割合に対して、セメント２〜１０重量％の範囲で添加し、一定の水量のもとで練り混ぜ、この混練材料を球状成形型加圧装置により球状に成形し、一定期間養生後、焼成したものである。
本発明の珪藻土とゴミ溶融スラグの混合による人工軽量骨材は、前記球状成形型加圧装置により粒径５〜２０ｍｍの球状にしたものである。 The method for producing an artificial lightweight aggregate by mixing diatomaceous earth and waste molten slag according to the present invention is to finely pulverize diatomaceous earth and waste molten slag, add cement as a stabilizer to them, and knead under a certain amount of water, This kneaded material is put into a spherical mold pressing device to make it spherical, and after curing for a certain period of time, it is fired to obtain an artificial lightweight aggregate.
The artificial lightweight aggregate by mixing diatomaceous earth and waste molten slag of the present invention is in the range of 2 to 10% by weight of cement with respect to a blending ratio of 75% by weight of finely ground diatomaceous earth and 25% by weight of finely ground dust molten slag. The kneaded material is added and kneaded under a constant amount of water, and the kneaded material is formed into a spherical shape with a spherical mold pressing device, cured for a certain period, and then fired.
The artificial lightweight aggregate obtained by mixing diatomaceous earth and waste molten slag according to the present invention is formed into a spherical shape having a particle diameter of 5 to 20 mm by the spherical mold pressing device.

本発明の珪藻土７５重量％とゴミ溶融スラグ２５重量％の配合割合に対して、セメント２〜１０重量％の添加で焼成した人工軽量骨材は、品質（密度、吸水率）が市販の製品と比べてもほとんど変わらないことが確認され、製品化・事業展開が期待できる効果がある。   The artificial lightweight aggregate baked with the addition of 2 to 10% by weight of cement with respect to the blending ratio of 75% by weight of diatomaceous earth and 25% by weight of molten slag of the present invention has a quality (density, water absorption) that is a commercially available product. It is confirmed that there is almost no change even when compared, and there is an effect that commercialization and business development can be expected.

以下に、本発明の珪藻土とゴミ溶融スラグの混合による人工軽量骨材の製造工程を説明する。
珪藻土を粒径５０μｍ以下に微粉砕し、ゴミ溶融スラグを粒径２５０μｍ以下に微粉砕する。
微粉砕した珪藻土とゴミ溶融スラグを７５重量％：２５重量％の配合割合で混合し、この配合割合の混合物に対して２〜１０重量％のセメントを安定材として混合する。
これらを一定の水量のもとで練り混ぜ、この混練した材料を球状成形型加圧装置により所定の球状に成形し、一定期間（２８日）養生後、高温１２００℃で４０〜１００分間焼成する。
これにより、５〜２０ｍｍ球状の人工軽量骨材が作製される。人工軽量骨材とは、人工的に焼成・発泡して得られる構造用及び非構造用軽量コンクリートの骨材であり、骨材の内部に空隙を保有し、表面が緻密なガラスで覆われた軽い骨材である。
この発明では非構造用軽量コンクリートの骨材を主眼としている。 Below, the manufacturing process of the artificial lightweight aggregate by mixing of the diatomaceous earth and garbage fusion | melting slag of this invention is demonstrated.
Diatomaceous earth is finely pulverized to a particle size of 50 μm or less, and dust molten slag is finely pulverized to a particle size of 250 μm or less.
Finely ground diatomaceous earth and waste molten slag are mixed at a blending ratio of 75% by weight: 25% by weight, and 2 to 10% by weight of cement is mixed as a stabilizer with respect to the mixture of the blending ratio.
These are kneaded under a constant amount of water, and the kneaded material is molded into a predetermined spherical shape with a spherical molding die pressurizer, cured for a certain period (28 days), and baked at a high temperature of 1200 ° C. for 40 to 100 minutes. .
Thereby, a 5-20 mm spherical artificial lightweight aggregate is produced. Artificial lightweight aggregate is a structural and non-structural lightweight concrete aggregate obtained by artificial firing and foaming, with voids inside the aggregate and the surface covered with dense glass Light aggregate.
This invention focuses on the aggregate of non-structural lightweight concrete.

Figure 2009221088
Figure 2009221088

図１、図２に本発明の球状成形型加圧装置の概略図を示す。
本発明の球状成形型加圧装置は、空気圧等の流体により作動されるシリンダー１と、該シリンダー１の作動により往復動されるピストンロッド２と、該ピストンロッド２の先端に固定された加圧板３と、該加圧板３により内部の混練材料Ｍがペレット状に押出成形される成形容器４と、該成形容器４から押し出されたペレット状の混練材料Ｓを移送するＵ字状断面の傾斜シュート５と、該傾斜シュート５の先端に上下に配置されたＵ溝成形主ローラ６及びＵ溝成形従ローラ７から構成される。
なお、８は機台、９は傾斜調節台、１０は空気吹き出し口、Ｍは混練材料、Ｓはペレット状混練材料である。 FIG. 1 and FIG. 2 show schematic views of the spherical mold pressing device of the present invention.
The spherical mold pressing device of the present invention includes a cylinder 1 that is operated by a fluid such as air pressure, a piston rod 2 that is reciprocated by the operation of the cylinder 1, and a pressure plate that is fixed to the tip of the piston rod 2. 3, a molding container 4 in which the internal kneading material M is extruded into a pellet shape by the pressure plate 3, and an inclined chute having a U-shaped cross section for transferring the pellet-shaped kneading material S extruded from the molding container 4 5, and a U-groove forming main roller 6 and a U-groove forming sub-roller 7 disposed vertically at the tip of the inclined chute 5.
In addition, 8 is a machine stand, 9 is an inclination adjustment stand, 10 is an air blowing port, M is a kneading material, and S is a pellet-like kneading material.

次に、本発明の球状成形型加圧装置の操作動作を添付図面に基づいて以下に説明する。
微粉砕した珪藻土とゴミ溶融スラグを７５重量％：２５重量％の配合割合で混合し、この配合割合の混合物に対して２〜１０重量％のセメントを安定材として混合し、これらを一定の水量のもとで練り混ぜ、この混練材料Ｍを成形容器４に充填する。
シリンダー１を作動させてピストンロッド２を伸長させて加圧板３により前記混練材料Ｍを押し出して前記成形容器４の下部からペレット状に混練材料Ｓを傾斜シュート５へ供給する。
前記ペレット状混練材料Ｓは前記傾斜シュート５を空気吹き出し口１０からのエアーにより転動落下し、上下に配置されたＵ溝成形主ローラ６及びＵ溝成形従ローラ７間に至り、前記Ｕ溝成形主ローラ６及びＵ溝成形従ローラ７間に挟まれて加圧され粒径５〜２０ｍｍの球状に成形される。 Next, the operation of the spherical mold pressing device of the present invention will be described below with reference to the accompanying drawings.
Finely ground diatomaceous earth and waste molten slag are mixed at a blending ratio of 75% by weight: 25% by weight, and 2-10% by weight of cement is mixed as a stabilizer with respect to the mixture of this blending ratio, and these are mixed with a certain amount of water. The kneaded material M is filled in the molding container 4.
The cylinder 1 is operated to extend the piston rod 2, and the kneaded material M is pushed out by the pressure plate 3, and the kneaded material S is supplied to the inclined chute 5 in the form of pellets from the lower part of the molding container 4.
The pellet-like kneaded material S rolls down the inclined chute 5 by the air from the air outlet 10 and reaches between the U-groove forming main roller 6 and the U-groove forming sub-roller 7 arranged above and below, and the U-groove It is sandwiched between the main molding roller 6 and the U-groove subordinate roller 7 and pressed to form a spherical shape having a particle diameter of 5 to 20 mm.

珪藻土の物理化学的性質
・比重が小さく、ポーラスであるため軽量である。
密度２．２０ｇ／ｃｍ３
・水分や油分を大量に保持する。
乾燥土壌改良する土壌改良材、流出した油を捕集する。
珪藻土の化学成分 Physicochemical properties of diatomaceous earth ・ Lightweight because of its low specific gravity and porosity.
Density 2.20 g / cm 3
・ Holds a large amount of moisture and oil.
Collects soil improvement material to improve dry soil and spilled oil.
Chemical composition of diatomaceous earth

Figure 2009221088
珪藻土は藻類の一種である珪藻の殻の化石からなる堆積物（堆積岩）である。
Figure 2009221088
 Diatomaceous earth is a deposit (sedimentary rock) consisting of fossils of diatom shell, a kind of algae.

ゴミ溶融スラグの物理化学的性質
・ゴミ溶融スラグ（秋田市総合環境センターの溶融施設からの排出物）
粒径２．３６ｍｍ〜０．１５ｍｍ、密度２．８７ｇ／ｃｍ３、吸水率０．６０％、透水係数４．６×１０−２ｃｍ／ｓ
ゴミ溶融スラグの化学成分 Physicochemical properties of waste melting slag ・ Waste melting slag (Emissions from melting facilities of Akita City Environmental Center)
2.36 mm to 0.15 mm particle size, density 2.87 g / cm 3 , water absorption 0.60%, water permeability 4.6 × 10 −2 cm / s
Chemical composition of waste molten slag

Figure 2009221088
ゴミ溶融スラグの潜在水硬性
二酸化珪素（ＳｉＯ２）が多量に含有し、かつガラス質９０％以上含有しており、水またはアルカリ水溶液で反応して水硬性を発揮する。微粉砕によって比表面積が増大、より潜在水硬性が増加する。
Figure 2009221088
 Potential hydraulic property of waste molten slag It contains a large amount of silicon dioxide (SiO 2 ) and contains 90% or more of glass, and exhibits hydraulic properties by reacting with water or an alkaline aqueous solution. The specific surface area is increased by pulverization, and the latent hydraulic property is further increased.

（実験例）
１．人工軽量骨材の材料
・珪藻土を５０μｍに微粉砕
・ゴミ溶融スラグを２５０μｍに微粉砕
２．実験条件
１）微粉砕した珪藻土とゴミ溶融スラグの配合
・珪藻土７５重量％、ゴミ溶融スラグ２５重量％（乾燥重量比）
・珪藻土５０重量％、ゴミ溶融スラグ５０重量％（乾燥重量比）
・珪藻土２５重量％、ゴミ溶融スラグ７５重量％（乾燥重量比）
２）上記１）の３種類の配合条件下でのセメントの配合割合
・２％、５％、１０％の３種類
３．上記２）条件で作製した混合材料の焼成温度と焼成時間
・珪藻土７５重量％、ゴミ溶融スラグ２５重量％は、１２００℃で４０〜１００分
・珪藻土５０重量％、ゴミ溶融スラグ５０重量％は、１２００℃で２〜１０分
・珪藻土２５重量％、ゴミ溶融スラグ７５重量％は、１２００℃で１分
４．電気炉の燃焼の温度段階と燃焼時間
ステップ１：３００℃まで１時間燃焼
ステップ２：３００℃〜６００℃まで１時間
ステップ３：６００℃〜９００℃まで１時間
ステップ４：９００℃〜１２００℃まで１時間
ステップ５：１２００℃到達後の燃焼時間は、上記の配合割合に依存する。 (Experimental example)
1. Artificial lightweight aggregate material ・ Diatomized diatomaceous earth to 50μm ・ Grinded molten slag to 250μm Experimental conditions 1) Mixing of finely ground diatomaceous earth and waste molten slag ・ 75% by weight of diatomaceous earth, 25% by weight of molten molten slag (dry weight ratio)
・ 50% by weight of diatomaceous earth, 50% by weight of molten slag (dry weight ratio)
・ 25% by weight of diatomaceous earth, 75% by weight of molten slag (dry weight ratio)
2) Cement blending ratio under the three blending conditions of 1)-3% 2%, 5%, 10% Firing temperature and firing time of the mixed material prepared under the above 2) conditions: 75% by weight of diatomaceous earth and 25% by weight of molten slag are 40 to 100 minutes at 1200 ° C. 50% by weight of diatomaceous earth and 50% by weight of molten molten slag are 2 to 10 minutes at 1200 ° C. ・ 25% by weight of diatomaceous earth and 75% by weight of molten slag for 1 minute at 1200 ° C. Temperature phase and combustion time of electric furnace combustion Step 1: Combustion for 1 hour to 300 ° C Step 2: 1 hour to 300 ° C to 600 ° C Step 3: 1 hour to 600 ° C to 900 ° C Step 4: Up to 900 ° C to 1200 ° C 1 hour Step 5: The combustion time after reaching 1200 ° C. depends on the blending ratio.

Figure 2009221088
本発明の珪藻土７５重量％とゴミ溶融スラグ２５重量％の配合割合に対して、セメント２〜１０重量％の添加で焼成した人工軽量骨材は、品質（密度、吸水率）が市販の製品と比べてもほとんど変わらないことが確認された。
Figure 2009221088
 The artificial lightweight aggregate baked with the addition of 2 to 10% by weight of cement with respect to the blending ratio of 75% by weight of diatomaceous earth and 25% by weight of molten slag of the present invention has a quality (density, water absorption) that is a commercially available product. It was confirmed that there was almost no change even when compared.

Figure 2009221088
また、珪藻土５０重量％とゴミ溶融スラグ５０重量％及び珪藻土２５重量％とゴミ溶融スラグ７５重量％の配合割合に対して、セメント２〜１０重量％の添加で焼成した人工骨材は、密度の観点から人工軽量骨材の条件をやや満たしていないが、通常の人工骨材としては十分製品化が期待できる。
Figure 2009221088
 In addition, with respect to the blending ratio of 50% by weight of diatomaceous earth and 50% by weight of waste molten slag and 25% by weight of diatomaceous earth and 75% by weight of waste molten slag, Although it does not meet the conditions of artificial lightweight aggregate from the viewpoint, it can be expected to be fully commercialized as a normal artificial aggregate.

本発明の球状成形型加圧装置の概略正面図である。It is a schematic front view of the spherical shaping | molding type pressurization apparatus of this invention. 本発明の球状成形型加圧装置の概略右側面図である。It is a schematic right side view of the spherical mold pressing device of the present invention.

符号の説明Explanation of symbols

１ シリンダー
２ ピストンロッド
３ 加圧板
４ 成形容器
５ 傾斜シュート
６ Ｕ溝成形主ローラ
７ Ｕ溝成形従ローラ
８ 機台
９ 傾斜調節台
１０ 空気吹き出し口 DESCRIPTION OF SYMBOLS 1 Cylinder 2 Piston rod 3 Pressure plate 4 Molding container 5 Inclination chute 6 U-groove formation main roller 7 U-groove formation sub-roller 8 Machine base 9 Inclination adjustment stand 10 Air outlet

Claims (3)

珪藻土とゴミ溶融スラグを微粉砕し、これらにセメントを安定材として添加し、一定の水量のもとで練り混ぜ、この混練材料を球状成形型加圧装置に入れて球状にし、一定期間養生後、焼成して人工的な軽量骨材とすることを特徴とする珪藻土とゴミ溶融スラグの混合による人工軽量骨材の製造方法。   Finely grind diatomaceous earth and waste molten slag, add cement as a stabilizer to them, knead under a constant amount of water, put this kneaded material into a spherical mold press and make it spherical, and after curing for a certain period of time A method for producing an artificial lightweight aggregate by mixing diatomaceous earth and waste molten slag, characterized by firing into an artificial lightweight aggregate. 微粉砕した珪藻土７５重量％と微粉砕したゴミ溶融スラグ２５重量％の配合割合に対して、セメント２〜１０重量％の範囲で添加し、一定の水量のもとで練り混ぜ、この混練材料を球状成形型加圧装置により球状に成形し、一定期間養生後、焼成したことを特徴とする珪藻土とゴミ溶融スラグの混合による人工軽量骨材。   Add to the blending ratio of 75% by weight of finely ground diatomaceous earth and 25% by weight of finely ground waste molten slag in a range of 2 to 10% by weight of cement and knead under a constant amount of water. An artificial lightweight aggregate made of a mixture of diatomaceous earth and waste molten slag, which is formed into a spherical shape by a spherical forming mold pressure device, cured for a certain period of time, and then fired. 前記球状成形型加圧装置により粒径５〜２０ｍｍの球状にしたことを特徴とする請求項２記載の珪藻土とゴミ溶融スラグの混合による人工軽量骨材。   The artificial lightweight aggregate by mixing diatomaceous earth and waste molten slag according to claim 2, wherein the spherical shape mold pressurizer is used to form a spherical shape having a particle diameter of 5 to 20 mm.
JP2008070566A 2008-03-19 2008-03-19 Artificial lightweight aggregate by mixing diatomaceous earth and waste molten slag Expired - Fee Related JP4214214B1 (en)

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