JPH11209151A - Production of artificial lightweight aggregate - Google Patents
Production of artificial lightweight aggregateInfo
- Publication number
- JPH11209151A JPH11209151A JP1187798A JP1187798A JPH11209151A JP H11209151 A JPH11209151 A JP H11209151A JP 1187798 A JP1187798 A JP 1187798A JP 1187798 A JP1187798 A JP 1187798A JP H11209151 A JPH11209151 A JP H11209151A
- Authority
- JP
- Japan
- Prior art keywords
- aggregate
- cement
- pressure steam
- weight
- coal ash
- 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
- C04B18/021—Agglomerated materials, e.g. artificial aggregates agglomerated by a mineral binder, e.g. cement
-
- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、人工骨材に関し、
具体的には石炭火力発電所や石炭焚きボイラーなどから
発生する石炭灰を、特に土木・建築用の人工軽量骨材と
して再資源化して有効利用するための人工軽量骨材の製
造方法に関する。The present invention relates to an artificial aggregate,
More specifically, the present invention relates to a method for producing an artificial lightweight aggregate for recycling coal ash generated from a coal-fired power plant or a coal-fired boiler, etc., as an artificial lightweight aggregate for civil engineering and construction.
【０００２】[0002]
【従来の技術】石炭は、石油に比べて資源が豊富で単位
発熱量あたりの価格も安価なことから、国内のエネルギ
ー政策により、特に発電用燃料として大幅な使用量の増
加が計画または実施されつつある。その結果、石炭火力
発電所や石炭焚きボイラーなどから発生する石炭灰が、
石炭使用量にほぼ比例して増加する結果、急増する石炭
灰の有効利用法が大きな課題となっている。2. Description of the Related Art Coal has abundant resources and a lower price per unit calorific value than petroleum. Therefore, domestic energy policy has planned or implemented a significant increase in the use of coal, especially as a fuel for power generation. It is getting. As a result, coal ash generated from coal-fired power plants and coal-fired boilers
As a result of the increase almost in proportion to the amount of coal used, the effective use of rapidly increasing coal ash has become a major issue.
【０００３】石炭灰の有効利用としては、人工軽量骨材
としての利用が、その需要量の大きさから大量処理の面
で適している。[0003] As an effective use of coal ash, use as artificial lightweight aggregate is suitable in terms of mass processing because of its large demand.
【０００４】しかし、石炭灰は、シンターグレート方式
で一部が骨材化されているものの、人工骨材としての利
用は国内では極めて少ない。その原因は、石炭火力発電
所や石炭焚きボイラーなどでは、ボイラーの水管やボイ
ラー壁への灰の付着を軽減するために、高融点の灰を発
生する石炭を選択して使用しているところにある。[0004] However, coal ash is partially aggregated by the sinter great method, but its use as an artificial aggregate is extremely small in Japan. The cause is that coal-fired power plants and coal-fired boilers use coal that generates high melting point ash in order to reduce the adhesion of ash to boiler water pipes and boiler walls. is there.
【０００５】すなわち、石炭火力発電所などの石炭焚き
ボイラーから発生する石炭灰は、一般的には融点が高
く、軽量骨材化するには低融点の粘土や頁岩を多量に混
入して焼成しなければならない。しかし、これらの粘土
や頁岩を多量に確保するのが困難であること、またこれ
らの粘土や頁岩を採掘・運搬・前処理・混合するのに多
額の費用を要する結果、人工軽量骨材の製造コストが高
くなっていること、さらには単位製品あたりの石炭灰の
使用率が低いことから石炭灰の有効利用上好ましくない
とされている。[0005] That is, coal ash generated from a coal-fired boiler such as a coal-fired power plant generally has a high melting point. There must be. However, it is difficult to secure a large amount of these clays and shale, and the cost of mining, transporting, pre-treating, and mixing these clays and shale is high. It is said that the cost is high and the use rate of coal ash per unit product is low.
【０００６】[0006]
【発明が解決しようとする課題】本発明の課題は、入手
が容易で低価格な添加剤を添加することにより、高強
度、かつ高品質な人工軽量骨材を安価に製造する方法を
提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a method for producing a high-strength, high-quality artificial lightweight aggregate at low cost by adding an easily available and inexpensive additive. It is in.
【０００７】[0007]
【課題を解決するための手段】本発明者らは、単位製品
当たりの石炭灰の使用率を増加してその有効利用率を高
め、且つ安価な製造方法について鋭意検討した結果、石
炭灰と酸化カルシウムおよび／または水酸化カルシウム
とセメントとを添加すれば上記課題を解決しうるという
知見を得、本発明を完成するに至った。Means for Solving the Problems The inventors of the present invention have increased the use rate of coal ash per unit product to increase the effective utilization rate thereof, and as a result of intensive studies on an inexpensive production method. It has been found that the above problems can be solved by adding calcium and / or calcium hydroxide and cement, and the present invention has been completed.
【０００８】すなわち、上記課題を解決するための本発
明の人工軽量骨材の製造方法は、石炭灰と、酸化カルシ
ウムおよび／または水酸化カルシウムと、セメントとを
混合して混合物を得、該混合物を必要に応じて湿式混練
し、成型した後、常圧蒸気養生し、高圧蒸気養生を施す
ものである。[0008] That is, according to the method for producing an artificial lightweight aggregate of the present invention for solving the above-mentioned problems, a mixture is obtained by mixing coal ash, calcium oxide and / or calcium hydroxide, and cement, and the mixture is obtained. Is subjected to wet kneading and molding as required, followed by normal-pressure steam curing and high-pressure steam curing.
【０００９】本発明の方法において、酸化カルシウムお
よび／または水酸化カルシウムの割合は、ＣａＯ換算で
１〜５０重量％、セメントの割合は１〜５０重量％とす
ることが、得られる人工軽量骨材の強度と石炭灰の利用
率を高くする観点より好ましい。In the method of the present invention, the ratio of calcium oxide and / or calcium hydroxide is 1 to 50% by weight in terms of CaO, and the ratio of cement is 1 to 50% by weight. This is preferable from the viewpoint of increasing the strength of coal and the utilization rate of coal ash.
【００１０】[0010]
【発明の実施の形態】以下、本発明の詳細およびその作
用についてさらに具体的に説明する。BEST MODE FOR CARRYING OUT THE INVENTION The details of the present invention and its operation will be more specifically described below.
【００１１】本発明は、 石炭灰と、酸化カルシウムお
よび／または水酸化カルシウムと、セメントとの混合物
を、要すれば成形し、養生するものである。よって、安
価に人工軽量骨材を製造できるという特徴がある。According to the present invention, a mixture of coal ash, calcium oxide and / or calcium hydroxide, and cement is molded and cured, if necessary. Therefore, there is a feature that an artificial lightweight aggregate can be manufactured at low cost.
【００１２】本発明に用いる石炭灰は特に限定されるも
のでなく、例えばフライアッシュとシンダアッシュの混
合物である原粉、ＪＩＳ Ａ６２０１に適合するような
フライアッシュ、粗粉、クリンカアッシュを含む全ての
石炭灰を用いることができる。また、前記石炭灰の粒度
にも特に影響されない。The coal ash used in the present invention is not particularly limited, and includes, for example, raw powder which is a mixture of fly ash and synda ash, fly ash which conforms to JIS A6201, fly ash, and clinker ash. Coal ash can be used. Also, it is not particularly affected by the particle size of the coal ash.
【００１３】本発明で用いるセメントは特に限定されな
いが、例えばＪＩＳ規格で規定されている普通ポルトラ
ンドセメント、早強ポルトランドセメント超早強ポルト
ランドセメント、中庸ポルトランドセメント、耐酸化カ
ルシウムおよび／または水酸化塩ポルトランドセメン
ト、白色セメント、超速硬セメント、アルミナセメン
ト、シリカセメント、高炉セメント、フライアッシュセ
メントなどが上げられる。[0013] The cement used in the present invention is not particularly limited. For example, ordinary Portland cement, fast-strength Portland cement, very fast-strength Portland cement, medium-strength Portland cement, calcium oxide resistant and / or hydroxide Portland semester specified by JIS standards. Cement, super-hard cement, alumina cement, silica cement, blast furnace cement, fly ash cement, etc.
【００１４】前記石炭灰と酸化カルシウムおよび／また
は水酸化カルシウムとセメントとの混合物は、混合した
骨材配合原料が平均粒径３０μｍ以下、好ましくは２０
μｍ以下であることが望ましく、必要であれば前記混合
物を粉砕することが好ましい。粉砕方法は所定の平均粒
径まで粉砕できるものであれば特に限定されず、いずれ
の方法でもよく、例えばポットミル、振動ミル、遊星ミ
ルなどのボ−ルミル、衝突式のジェット粉砕機、タ−ボ
粉砕機などが挙げられる。なお、骨材配合原料を上記平
均粒径にするのは、最終的に得られる建材の強度を良好
にするためである。In the mixture of coal ash and calcium oxide and / or calcium hydroxide and cement, the mixed aggregate-mixed raw material has an average particle diameter of 30 μm or less, preferably 20 μm or less.
μm or less, and if necessary, it is preferable to grind the mixture. The method of pulverization is not particularly limited as long as it can be pulverized to a predetermined average particle size, and any method may be used. A crusher and the like can be mentioned. The reason for setting the average particle diameter of the aggregate compounding raw material is to improve the strength of the finally obtained building material.
【００１５】骨材化における酸化カルシウムおよび／ま
たは水酸化カルシウムとセメントとの配合量は、骨材の
強度と石炭灰の利用率向上の点からそれぞれ、ＣａＯ換
算で１〜５０重量％、１〜５０重量％とすることが好ま
しい。The amounts of calcium oxide and / or calcium hydroxide and cement in the formation of aggregate are 1 to 50% by weight and 1 to 50% by weight, respectively, in terms of CaO from the viewpoint of improving the strength of the aggregate and the utilization of coal ash. Preferably, it is 50% by weight.
【００１６】石炭灰と酸化カルシウムおよび／または水
酸化カルシウムとセメントとの混合物は必要に応じて湿
式混練するが、採用する混練装置も特に限定されず汎用
の混練装置を用いることができる。The mixture of coal ash and calcium oxide and / or calcium hydroxide and cement is wet-kneaded if necessary, but the kneading apparatus employed is not particularly limited, and a general-purpose kneading apparatus can be used.
【００１７】成型方法としては、所定の大きさになるよ
うに成型できるものであればよく、例えばパンペレタイ
ザーや押し出し成型機などを用いると簡便である。Any molding method can be used as long as it can be molded to a predetermined size. For example, it is convenient to use a pan pelletizer or an extrusion molding machine.
【００１８】次に、養生工程について説明する。Next, the curing step will be described.
【００１９】養生方法は、湿潤養生法、常圧の蒸気養生
法および高圧の蒸気養生法が知られているが、本発明で
は常圧蒸気養生法と高圧蒸気養生法とを併用する。高圧
蒸気養生法のみで不十分というわけではなく、得られる
骨材強度の点から常圧蒸気養生と高圧蒸気養生との併用
が好ましいからである。As the curing method, a wet curing method, a normal pressure steam curing method and a high pressure steam curing method are known. In the present invention, the normal pressure steam curing method and the high pressure steam curing method are used in combination. This is because the high-pressure steam curing alone is not insufficient, and the combined use of normal-pressure steam curing and high-pressure steam curing is preferable from the viewpoint of the obtained aggregate strength.
【００２０】常圧蒸気養生は高圧蒸気養生の前養生とし
て行うが、この条件は、２０℃〜１００℃で１時間以
上、好ましくは３時間以上の養生を行うことである。ま
た、高圧蒸気養生はオ−トクレ−ブ中で行うが、その条
件は、生産性および骨材強度の点から１１０℃〜２５０
℃で１時間以上、好ましくは３時間以上養生することで
ある。The normal-pressure steam curing is performed as a pre-curing before the high-pressure steam curing. The condition is that the curing is performed at 20 ° C. to 100 ° C. for 1 hour or more, preferably 3 hours or more. The high-pressure steam curing is carried out in an autoclave. The conditions are 110 ° C. to 250 ° C. in terms of productivity and aggregate strength.
Curing at ℃ for 1 hour or more, preferably 3 hours or more.
【００２１】尚、これらの養生条件は酸化カルシウムお
よび／または水酸化カルシウムやセメントの割合によっ
て変化するため、予めこれらの割合に応じた養生条件を
求めておき、適用することが好ましい。Since these curing conditions vary depending on the proportions of calcium oxide and / or calcium hydroxide and cement, it is preferable that curing conditions corresponding to these proportions are determined in advance and applied.
【００２２】[0022]
【実施例】以下実施例および比較例により、本発明を更
に説明する。但し、本発明は下記実施例に限定されるも
のでない。The present invention will be further described with reference to the following examples and comparative examples. However, the present invention is not limited to the following examples.
【００２３】用いた石炭灰は、ＳｉＯ２：５６．２０
％， Ａｌ２Ｏ３：３２．１０％，Ｆｅ２Ｏ３：３．５
７％， ＣａＯ：０．５９％， ＭｇＯ：１．４０％，
Ｎａ２Ｏ：０．２２％ ， Ｋ２Ｏ：０．４８％のも
のである。The coal ash used was SiO2: 56.20.
%, Al2O3: 32.10%, Fe2O3: 3.5
7%, CaO: 0.59%, MgO: 1.40%,
Na2O: 0.22%, K2O: 0.48%.
【００２４】（実施例１）石炭灰９１重量％、酸化カル
シウム４重量％、ポルトランドセメント５重量％からな
る骨材配合原料を、ボ−ルミルにて平均粒径が１４μｍ
となるように混合粉砕した。(Example 1) An aggregate-mixed raw material comprising 91% by weight of coal ash, 4% by weight of calcium oxide and 5% by weight of Portland cement was subjected to ball milling to an average particle size of 14 µm.
And pulverized so that
【００２５】次に、この粉砕物と水とを用い、パンぺレ
タイザ−で直径約１０〜１５ｍｍ程度の球状造粒物を得
た。Next, a spherical granulated product having a diameter of about 10 to 15 mm was obtained using the pulverized product and water using a pan pelletizer.
【００２６】その後、３０℃−９５％ＲＨ雰囲気下で２
４時間常圧蒸気養生を行った。そして、得られた骨材ａ
をオ−トクレ−ブに充填し、１８５℃−９５％ＲＨ雰囲
気下で８時間の高圧蒸気養生を行った。得られた骨材の
評価として、圧潰強度（一軸圧縮破壊荷重）の測定を行
った。尚、圧潰強度は圧潰試験機によって直径１０ｍｍ
の各骨材について測定し、その平均値を求めた。評価結
果を表１に示した。Then, at 30 ° C. and 95% RH atmosphere,
Normal pressure steam curing was performed for 4 hours. And the obtained aggregate a
Was filled in an autoclave and subjected to high-pressure steam curing for 8 hours under an atmosphere of 185 ° C. and 95% RH. As an evaluation of the obtained aggregate, the crushing strength (uniaxial compression breaking load) was measured. The crushing strength was 10 mm in diameter by a crushing tester.
Was measured for each aggregate, and the average value was determined. Table 1 shows the evaluation results.
【００２７】表１からわかるように、圧潰強度２９ｋｇ
ｆの骨材が得られた。As can be seen from Table 1, the crushing strength is 29 kg.
The aggregate of f was obtained.
【００２８】（実施例２〜６および比較例１〜２）石炭
灰８６重量％、ポルトランドセメント１０重量％および
酸化カルシウム４重量％とした以外は実施例１と同様に
して骨材ｂ（実施例２）を、石炭灰７６重量％、ポルト
ランドセメント２０重量％および酸化カルシウム４重量
％とした以外は実施例１と同様にして骨材ｃ（実施例
３）を、石炭灰６６重量％、ポルトランドセメント３０
重量％および酸化カルシウム４重量％とした以外は実施
例１と同様にして骨材ｄ（実施例４）を、石炭灰８７重
量％、ポルトランドセメント５重量％および酸化カルシ
ウム８重量％とした以外は実施例１と同様にして骨材ｅ
（実施例５）を、石炭灰７９重量％、ポルトランドセメ
ント５重量％および酸化カルシウム１６重量％とした以
外は実施例１と同様にして骨材ｆ（実施例６）を、石炭
灰９６重量％および酸化カルシウム４重量％とした以外
は実施例１と同様にして骨材ｇ（比較例１）を、石炭灰
９５重量％およびポートランドセメント５重量％とした
以外は実施例１と同様にして骨材ｈ（比較例２）を得
た。評価結果を表１に示す。(Examples 2 to 6 and Comparative Examples 1 and 2) Aggregate b (Example 1) except that 86% by weight of coal ash, 10% by weight of Portland cement and 4% by weight of calcium oxide were used. 2) was changed to 76% by weight of coal ash, 20% by weight of Portland cement and 4% by weight of calcium oxide in the same manner as in Example 1, except that aggregate c (Example 3) was converted to 66% by weight of coal ash and Portland cement. 30
Except that the weight of the aggregate d (Example 4) was changed to 87% by weight of coal ash, 5% by weight of Portland cement and 8% by weight of calcium oxide, except that the weight was set to 4% by weight and 4% by weight of calcium oxide. Aggregate e in the same manner as in Example 1.
Except that (Example 5) was changed to 79% by weight of coal ash, 5% by weight of Portland cement and 16% by weight of calcium oxide, aggregate f (Example 6) was replaced with 96% by weight of coal ash. Aggregate g (Comparative Example 1) was prepared in the same manner as in Example 1, except that calcium oxide was changed to 4% by weight, and coal ash was changed to 95% by weight and Portland cement was changed to 5% by weight. Aggregate h (Comparative Example 2) was obtained. Table 1 shows the evaluation results.
【００２９】表１に示すように、実施例２〜６は比較例
１〜２に比べ全て圧潰強度３５ｋｇｆ以上上回る高強度
の骨材が得られた。As shown in Table 1, in Examples 2 to 6, aggregates having high crushing strength of 35 kgf or more were obtained as compared with Comparative Examples 1 and 2.
【００３０】（実施例７）常圧蒸気の養生時間を６時間
とした以外は実施例２と同様にして骨材ｉ（実施例７）
を得た。評価結果を表１に示す。(Example 7) Aggregate i (Example 7) in the same manner as in Example 2 except that the curing time of the normal pressure steam was changed to 6 hours.
I got Table 1 shows the evaluation results.
【００３１】表１に示すように、圧潰強度２９ｋｇｆの
骨材が得られた。As shown in Table 1, an aggregate having a crushing strength of 29 kgf was obtained.
【００３２】（実施例８）ボ−ルミル粉砕した粉砕物を
万能混合攪拌機にて水を添加して１０分間混練した後、
該混練物を直径１０ｍｍ、高さ１２ｍｍの円柱状に押し
出し成型した以外は実施例１と同様にして骨材ｊ（実施
例８）を得た。評価結果を表１に示す。Example 8 Water was added to a ball milled pulverized product by a universal mixing stirrer and kneaded for 10 minutes.
An aggregate j (Example 8) was obtained in the same manner as in Example 1 except that the kneaded product was extruded into a column having a diameter of 10 mm and a height of 12 mm. Table 1 shows the evaluation results.
【００３３】表１に示すように、圧潰強度７０ｋｇｆを
超える高強度の骨材が得られた。As shown in Table 1, a high-strength aggregate having a crushing strength exceeding 70 kgf was obtained.
【００３４】（実施例９）混合した骨材配合原料の平均
粒径が２５μｍとなるように粉砕した以外は、実施例１
と同様にして骨材ｋ（実施例９）を得た。評価結果を表
１に示す。Example 9 Example 1 was repeated except that the mixed aggregate-mixed raw material was pulverized so as to have an average particle size of 25 μm.
An aggregate k (Example 9) was obtained in the same manner as described above. Table 1 shows the evaluation results.
【００３５】表１に示すように、圧潰強度２７ｋｇｆの
骨材が得られた。As shown in Table 1, an aggregate having a crushing strength of 27 kgf was obtained.
【００３６】（比較例３）高圧蒸気養生を行わず常圧蒸
気養生のみ７日間行った以外は実施例１と同様にして骨
材ｌ（比較例３）を得た。評価結果を表１に示す。Comparative Example 3 An aggregate 1 (Comparative Example 3) was obtained in the same manner as in Example 1 except that high-pressure steam curing was not performed and only normal-pressure steam curing was performed for 7 days. Table 1 shows the evaluation results.
【００３７】表１に示すように、得られた骨材の圧潰強
度は５ｋｇｆであった。As shown in Table 1, the crushing strength of the obtained aggregate was 5 kgf.
【００３８】 [0038]
【００３９】[0039]
【発明の効果】本発明に従えば、石炭火力発電所や石炭
焚きボイラーなどから発生する石炭灰を原料として、非
焼成型の人工軽量骨材を低コストで効率的に生産するこ
とができる。従って、産業廃棄物を埋め立てて処理する
ことなく、土木・建築材料などに安価に再資源化できる
ことから、本発明が環境の保全とエネルギーの安定供給
に寄与するところ大である。According to the present invention, a non-fired artificial lightweight aggregate can be efficiently produced at low cost using coal ash generated from a coal-fired power plant or a coal-fired boiler as a raw material. Therefore, the present invention can greatly contribute to environmental preservation and stable supply of energy because industrial waste can be recycled at low cost without reclaiming and treating industrial waste.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 須藤 真悟 千葉県 市川市 中国分 ３−18−５ 住 友金属鉱山株式会社中央研究所内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shingo Sudo 3-18-5, Chugoku, Ichikawa, Chiba Pref.
Claims (4)
たは水酸化カルシウムと、セメントとを混合して混合物
を得、これを要すれば成型した後、常圧蒸気養生し、高
圧蒸気養生することを特徴とする人工軽量骨材の製造方
法。1. A method in which coal ash, calcium oxide and / or calcium hydroxide, and cement are mixed to obtain a mixture. If necessary, the mixture is molded, and then subjected to normal-pressure steam curing and high-pressure steam curing. A method for producing an artificial lightweight aggregate.
カルシウムの割合がＣａＯ換算で１〜５０重量％、セメ
ントの割合が１〜５０重量％である請求項１記載の人工
軽量骨材の製造方法。2. The method for producing an artificial lightweight aggregate according to claim 1, wherein the proportion of calcium oxide and / or calcium hydroxide is 1 to 50% by weight in terms of CaO, and the proportion of cement is 1 to 50% by weight.
るように粉砕した後、要すれば成型し、常圧蒸気養生
し、高圧蒸気養生することを特徴とする請求項１または
２記載の方法。3. The method according to claim 1, wherein the mixture is pulverized so as to have an average particle size of 30 μm or less, then, if necessary, molded, cured under normal pressure steam, and cured under high pressure steam. .
るように粉砕した後、要すれば成型し、常圧蒸気養生
し、高圧蒸気養生することを特徴とする請求項１または
２記載の方法。4. The method according to claim 1, wherein the mixture is pulverized so as to have an average particle diameter of 20 μm or less, and then, if necessary, molded, subjected to normal-pressure steam curing, and then subjected to high-pressure steam curing. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1187798A JPH11209151A (en) | 1998-01-26 | 1998-01-26 | Production of artificial lightweight aggregate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1187798A JPH11209151A (en) | 1998-01-26 | 1998-01-26 | Production of artificial lightweight aggregate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11209151A true JPH11209151A (en) | 1999-08-03 |
Family
ID=11789970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1187798A Pending JPH11209151A (en) | 1998-01-26 | 1998-01-26 | Production of artificial lightweight aggregate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11209151A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1394813A2 (en) * | 2002-07-18 | 2004-03-03 | Kabushiki Kaisha Kobe Seiko Sho | Cement composite, concrete, concrete cask and method of manufacturing concrete |
| JP2015145337A (en) * | 2015-04-17 | 2015-08-13 | 株式会社大協組 | Method for manufacturing foaming hydrothermal solidified body with burned ash as main raw material |
-
1998
- 1998-01-26 JP JP1187798A patent/JPH11209151A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1394813A2 (en) * | 2002-07-18 | 2004-03-03 | Kabushiki Kaisha Kobe Seiko Sho | Cement composite, concrete, concrete cask and method of manufacturing concrete |
| EP1394813A3 (en) * | 2002-07-18 | 2006-05-24 | Kabushiki Kaisha Kobe Seiko Sho | Cement composite, concrete, concrete cask and method of manufacturing concrete |
| US7294375B2 (en) | 2002-07-18 | 2007-11-13 | Kabushiki Kaisha Kobe Seiko Sho | Cement composite, concrete, concrete cask and method of manufacturing concrete |
| KR100973383B1 (en) | 2002-07-18 | 2010-07-30 | 가부시키가이샤 고베 세이코쇼 | Cement composite, concrete, concrete cask and method of manufacturing concrete |
| JP2015145337A (en) * | 2015-04-17 | 2015-08-13 | 株式会社大協組 | Method for manufacturing foaming hydrothermal solidified body with burned ash as main raw material |
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