JP2008247642A - Inorganic combined/hardened material and method for producing the same - Google Patents

Inorganic combined/hardened material and method for producing the same Download PDF

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JP2008247642A
JP2008247642A JP2007088573A JP2007088573A JP2008247642A JP 2008247642 A JP2008247642 A JP 2008247642A JP 2007088573 A JP2007088573 A JP 2007088573A JP 2007088573 A JP2007088573 A JP 2007088573A JP 2008247642 A JP2008247642 A JP 2008247642A
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gypsum
stimulant
inorganic composite
fly ash
cured product
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Fumio Iso
文夫 磯
Akio Ono
章夫 小野
Mitsuo Yoshiba
光雄 吉葉
Sakae Kato
栄 加藤
Hiroyuki Sango
弘之 三五
Motoo Tobisaka
基夫 飛坂
Keiichi Imamoto
啓一 今本
Hiroyasu Ito
裕恭 伊東
Takayuki Yamada
隆之 山田
Manabu Kitashiro
学 北代
Shigeo Nagano
榮夫 長野
Yasuo Okada
安雄 岡田
Kenji Tezuka
研二 手塚
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YASUZUMI KK
Tochigi Prefecture
Yoshizawa Lime Industry Co Ltd
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YASUZUMI KK
Tochigi Prefecture
Yoshizawa Lime Industry Co Ltd
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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
    • 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
    • C04B28/14—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 calcium sulfate 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

<P>PROBLEM TO BE SOLVED: To produce a hardened body having the strength equivalent to that of a building material from waste gypsum, blast furnace slag and fly ash, which are industrial waste materials, at a low cost while heightening an energy control effect. <P>SOLUTION: Water is added to a powdery mixture of waste gypsum, blast furnace slag and fly ash to obtain a pasty material, burned dolomite (CaO-MgO) is added to the obtained pasty material as an exciting agent by 1-3% and the dolomite-added pasty material is aged at 40-60°C ageing temperature to easily obtain the hardened body which is harder than the hardened body obtained by using portland cement as the exciting agent and can be used as it is as the building material. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、建築物の新築時や解体時等に排出される廃石膏の微粉末を用いて製造することができる無機複合硬化物およびその製造方法の技術分野に属するものである。   The present invention belongs to the technical field of an inorganic composite cured product that can be manufactured using fine powder of waste gypsum discharged at the time of new construction or demolition of a building, and a method for manufacturing the same.

一般に、建築物には石膏ボードが多量に採用されており、このような石膏ボードの廃材は、建築物の解体時には勿論であるが、新築時や修復時においても端材として多量に排出される。そしてこのように多量に排出された廃石膏ボードについて、単純に埋め立てに用いることは、埋め立て処分場の逼迫という立場からは勿論のこと、石膏資源の枯渇化の観点からしても好ましくなく、このようなことから廃石膏ボードの有効利用化を図ることが要求されている。
ところで廃石膏ボードを構成している廃石膏は二水物（二水石膏）であり、そこでこの二水石膏を加熱する等して脱水処理をして無水石膏に再生することが提唱されるが、再生石膏は、採掘した消石灰から製造した生石膏に比して性能が悪いという問題があるだけでなく、エネルギー価格の高騰もあって再生するに必要なエネルギー消費が高価になることも考えられて現実性に乏しい。
これに対し、廃石膏を石炭灰と消石灰と混合して硬化させることで硬化物を製造することが提唱されている（例えば特許文献１）が、このものは圧縮強度が弱いという問題があるだけでなく、消石灰という工業的にも有用な資源を用いなければならず、資源的な観点からも問題がある。
これに対し、石膏廃棄物粉末を二酸化珪素、アルミナ、そして水酸化カルシウムと混合して水和硬化性組成物を製造することが知られている（例えば特許文献２）。ところが前記水和硬化性組成物を製造する際に、二酸化珪素やアルミナという貴重な資源が必要であるという問題があるだけでなく、１００℃以上という高温での反応が必要になってエネルギー的な面でも問題がある。
そこで廃石膏、フライアッシュ、そして高炉スラグという産業廃棄物同志を混合し、混合物の硬化を促す刺激剤として普通ポルトランドセメントを使用し、これによって建材として利用できる強度を備えた硬化体を製造できることを提唱した（非特許文献１参照）。
特開昭５６−１４９３６７号公報 特開２００３−２８６０６７号公報 日本建築仕上学会論文報告集，ＦＩＮＥＸ，Ｖｏｌ．１８，Ｎｏ．１０６，第１３巻，第１号 １−６頁，２００６年５月発行 In general, a large amount of gypsum board is used in buildings, and such gypsum board waste is naturally discharged at the time of demolition of the building, but also as a scrap material during new construction or restoration. . And it is not desirable to simply use the waste gypsum board discharged in this way for landfill from the standpoint of the landfill disposal site, and from the viewpoint of depletion of gypsum resources. Therefore, effective utilization of waste gypsum board is required.
By the way, the waste gypsum that constitutes the waste gypsum board is dihydrate (dihydrate gypsum), and it is proposed that this dihydrate gypsum is dehydrated and regenerated into anhydrous gypsum, for example, by heating. Recycled gypsum is not only poor in performance compared to raw gypsum manufactured from mined slaked lime, but also due to high energy prices, it can be considered that the energy consumption required for regeneration is expensive. It is not realistic.
On the other hand, it has been proposed to produce a cured product by mixing waste gypsum with coal ash and slaked lime (for example, Patent Document 1), but this has only a problem of low compressive strength. In addition, industrially useful resources such as slaked lime must be used, and there is a problem from the viewpoint of resources.
On the other hand, it is known that gypsum waste powder is mixed with silicon dioxide, alumina, and calcium hydroxide to produce a hydrated curable composition (for example, Patent Document 2). However, when producing the hydration curable composition, there is a problem that not only a valuable resource such as silicon dioxide or alumina is required, but also a reaction at a high temperature of 100 ° C. or more is required, which is energetic. There is also a problem.
Therefore, mixing industrial wastes such as waste gypsum, fly ash, and blast furnace slag, and using ordinary Portland cement as a stimulant to promote the hardening of the mixture, it is possible to produce a cured body with strength that can be used as a building material It was proposed (see Non-Patent Document 1).
JP-A-56-149367 JP 2003-286067 A Journal of Japan Society for Finishings Technology, FINEX, Vol. 18, no. 106, Volume 13, Issue 1-6, May 2006

ところで前記刺激剤として用いられる普通ポルトランドセメントは、自らが硬化材であり、そのため、添加量を増大させるほど硬化機能が高くなっていくことは当然であり、このような硬化物を刺激剤として用いることなく、しかも少量添加で硬度アップした無機複合硬化物を製造することが要求され、ここに本発明が解決せんとする課題がある。   By the way, normal Portland cement used as the stimulant is a curing material itself, and therefore, as the amount added is increased, it is natural that the curing function becomes higher, and such a cured product is used as a stimulant. In addition, it is required to produce an inorganic composite cured product having increased hardness by addition of a small amount, and there is a problem to be solved by the present invention.

本発明は、上記の如き実情に鑑みこれらの課題を解決することを目的として創作されたものであって、請求項１の発明は、石膏、スラグ、フライアッシュの粉末混合物に水を添加してペースト状にしたものに、酸化マグネシウムと酸化カルシウムまたは水酸化カルシウムとの混合物を刺激剤として０．５〜３重量％を添加し、養生温度を４０〜６０℃として養生して得られることを特徴とする無機複合硬化物である。
請求項２の発明は、刺激剤はドロマイトの焼成物または消化物であることを特徴とする請求項１記載の無機複合硬化物である。
請求項３の発明は、石膏は廃石膏であることを特徴とする請求項１または２記載の無機複合硬化物である。
請求項４の発明は、石膏、スラグ、フライアッシュの粉末混合物に水を添加してペースト状にしたものに、酸化マグネシウムと酸化カルシウムまたは水酸化カルシウムとの混合物を刺激剤として０．５〜３％を添加し、養生温度を４０〜６０℃として養生して得ることを特徴とする無機複合硬化物の製造方法である。
請求項５の発明は、刺激剤はドロマイトの焼成物または消化物であることを特徴とする請求項４記載の無機複合硬化物の製造方法である。
請求項６の発明は、石膏は廃石膏であることを特徴とする請求項４または５記載の無機複合硬化物の製造方法である。 The present invention was created in view of the above-mentioned circumstances in order to solve these problems, and the invention of claim 1 adds water to a powder mixture of gypsum, slag and fly ash. The paste is obtained by adding 0.5 to 3% by weight of a mixture of magnesium oxide and calcium oxide or calcium hydroxide as a stimulant and curing at a curing temperature of 40 to 60 ° C. It is an inorganic composite cured product.
The invention according to claim 2 is the inorganic composite cured product according to claim 1, wherein the stimulant is a burned product or a digested product of dolomite.
The invention according to claim 3 is the inorganic composite cured product according to claim 1 or 2, wherein the gypsum is waste gypsum.
The invention of claim 4 is a paste obtained by adding water to a powder mixture of gypsum, slag and fly ash, and using a mixture of magnesium oxide and calcium oxide or calcium hydroxide as a stimulant, 0.5 to 3 %, And the curing temperature is 40 to 60 ° C. to obtain and cure the inorganic composite cured product.
The invention according to claim 5 is the method for producing an inorganic composite cured product according to claim 4, wherein the stimulant is a baked or digested product of dolomite.
The invention of claim 6 is the method for producing an inorganic composite cured product according to claim 4 or 5, wherein the gypsum is waste gypsum.

請求項１または４の発明とすることにより、産業廃棄物として生成される石膏、スラグ、フライアッシュという成分を有効に利用し、しかもこれら混合物を硬化するための刺激剤として酸化マグネシウムと酸化カルシウムまたは水酸化カルシウムとの混合物を用いることで、低温養生によりポルトランドセメントを用いた場合よりも高い硬度の無機複合硬化物を生産できることになる。
請求項２または５の発明とすることにより、刺激剤が入手しやすいドロマイトからできることになって、エネルギー抑制効果が高い無機複合硬化物を容易に生産できることになる。
請求項３または６の発明とすることにより、廃石膏を用いてのエネルギー抑制効果が高い無機複合硬化物を安価に生産できることになる。 By making the invention of claim 1 or 4 effectively use components such as gypsum, slag, fly ash produced as industrial waste, and magnesium oxide and calcium oxide as stimulants for curing these mixtures, By using a mixture with calcium hydroxide, it is possible to produce an inorganic composite cured product having a higher hardness than when Portland cement is used by low-temperature curing.
By setting it as invention of Claim 2 or 5, it can be made from the dolomite from which a stimulant is easy to acquire, and can produce easily an inorganic composite hardened | cured material with a high energy suppression effect.
By setting it as invention of Claim 3 or 6, the inorganic composite hardened | cured material with a high energy suppression effect using waste gypsum can be produced cheaply.

本発明は、廃石膏を再生することなくそのままの形態、つまり二水物石膏のままで再利用を図るものであり、その場合に混和（混合）する物質についても産業廃棄物、具体的には石炭火力発電所で発生するフライアッシュ、鉄鋼製造工程において副産物として生産される高炉スラグ等のスラグを用いるものであり、これらのものを原料とし、そして１００℃以上の高温処理することなく無機複合硬化体を作成するものであり、その場合に用いる刺激剤についても、ポルトランドセメントのような自ら硬化性を有した産業生産物でなく、酸化マグネシウム（ＭｇＯ）と酸化カルシウム（ＣａＯ）または水酸化カルシウム（Ｃａ（ＯＨ）２）との混合物を刺激剤として用いるが、このような刺激剤は、各化合物を混合したものであってもよく、さらには天然鉱物として採取されるドロマイト（ＣａＣＯ３・ＭｇＣＯ３）の焼成物（軽焼物）、消化物（カルシウムについては水酸化物になっているが、マグネシウムについては全てが水酸化物となりきらず、水酸化物と酸化物との混合物になっている）であってもよい。 The present invention aims to recycle waste gypsum as it is without regenerating it, that is, dihydrate gypsum. In this case, the substance mixed (mixed) is also industrial waste, specifically, It uses fly ash generated at coal-fired power plants and slag such as blast furnace slag produced as a by-product in the steel manufacturing process. These materials are used as raw materials, and inorganic composite curing without high-temperature treatment at 100 ° C or higher. The stimulant used in that case is not an industrial product such as Portland cement that has its own curability, but magnesium oxide (MgO) and calcium oxide (CaO) or calcium hydroxide ( using a mixture of Ca (OH) 2) as a stimulator, but such stimulatory agents may be a mixture of each compound, Calcination of dolomite to be taken as a natural mineral (CaCO 3 · MgCO 3) to al (light pottery), but has become a hydroxide for digest (calcium, all for magnesium not completely become a hydroxide Or a mixture of hydroxide and oxide).

本発明は、酸化マグネシウムと酸化カルシウムまたは水酸化カルシウムとの混合物を刺激剤とすることで建材として利用できるまでの強度を有した硬化体にすることを見出し、しかもその場合において、高炉スラグに代表されるスラグは潜在的な水硬性を有し、硬化物を得るのに適しているといえる。しかしながらこのものに廃石膏を用いた場合、硬化体の初期の硬化（強度発現）の遅延が予想されるが、この遅延は建材として利用する硬化体の生産性に悪影響を及ぼす、つまり歩留まりが悪くなるため、如何にして強度発現を促すか、ということについて鋭意検討し、本発明を完成した。   The present invention has found that a hardened body having a strength that can be used as a building material by using a mixture of magnesium oxide and calcium oxide or calcium hydroxide as a stimulant, and in that case, is representative of blast furnace slag. The slag to be produced has potential hydraulic properties and is suitable for obtaining a cured product. However, when waste gypsum is used for this material, a delay in the initial curing (strength development) of the cured body is expected, but this delay adversely affects the productivity of the cured body used as a building material, that is, the yield is poor. Therefore, the present invention was completed by intensively studying how to promote strength development.

廃石膏としては、廃石膏のみであることが好ましいが、現実には表面に紙が貼着された廃石膏ボードとして供給される場合が多く、このものから紙を完全に取り除くことは手間隙がかかることになって生産性の点で問題があり、そこで紙が多少付着していて問題なく硬化体を生産できることについても合わせて検討した。   As waste gypsum, it is preferable to use only waste gypsum, but in reality, it is often supplied as waste gypsum board with paper stuck to the surface, and it takes time to completely remove the paper from this. In particular, there was a problem in terms of productivity, and we also examined that a hardened body can be produced without any problems because of a small amount of paper.

この場合において、前記非特許文献１に記載される研究の過程で、石膏、高炉スラグ、フライアッシュの混合割合と硬化体の強度との関係について、図１に示すグラフ図において破線で囲んだ範囲が好ましいことが確認されている。そこでその略中央点となるところとして、重量比でフライアッシュ：高炉スラグ：市販石膏＝２０：６０：２０に調合したものについて、水／粉体比で０．４となるように調合してペースト状のものを作成し、このものに、刺激剤として、前述した普通ポルトランドセメントの他に、生石灰、焼成ドロマイト（ＣａＯ・ＭｇＯ）、水酸化マグネシウム（Ｍｇ（ＯＨ）２）、酸化マグネシウム（ＭｇＯ）、大谷石、ゼオライト（Ｎａ、Ｋ、Ｃａ）を選択し、これらについて添加率（重量％）を調整しながら添加し、２０℃にて養生したものについて生成物の初期（材齢７日）の強度測定をした。その結果を図２のグラフ図に示す。これによると、刺激剤を無添加のもの、水酸化マグネシウム、大谷石、ゼオライト（Ｎａ、Ｋ、Ｃａ）は何れも硬化が発現しなかったが、普通ポルトランドセメント、焼成ドロマイト、酸化マグネシウム、生石灰を刺激剤として添加したものは硬化が発現した。この場合において、焼成ドロマイトは、普通ポルトランドセメント、生石灰、酸化マグネシウムを越えて優れた硬化が発現しているのが確認され、そして焼成ドロマイトの添加量としては、０．５〜３％程度が好適であるのが確認され、本発明を完成した。 In this case, in the course of the research described in Non-Patent Document 1, the relationship between the mixing ratio of gypsum, blast furnace slag and fly ash and the strength of the hardened body is a range surrounded by a broken line in the graph shown in FIG. Is confirmed to be preferable. Therefore, a paste prepared by mixing the fly ash: blast furnace slag: commercial gypsum = 20: 60: 20 by weight ratio so that the water / powder ratio is 0.4. In addition to the above-mentioned ordinary Portland cement, quick lime, calcined dolomite (CaO · MgO), magnesium hydroxide (Mg (OH) 2 ), magnesium oxide (MgO) , Otani stone, zeolite (Na, K, Ca) are selected, added while adjusting the addition rate (% by weight) for these, and cured at 20 ° C. at the beginning of the product (age 7 days) The strength was measured. The result is shown in the graph of FIG. According to this, none of the stimulants added, magnesium hydroxide, Otani stone, and zeolite (Na, K, Ca) did not cure, but ordinary Portland cement, calcined dolomite, magnesium oxide, quick lime What was added as a stimulant developed hardening. In this case, it is confirmed that the baked dolomite exhibits excellent hardening over ordinary Portland cement, quicklime, and magnesium oxide, and the addition amount of the baked dolomite is preferably about 0.5 to 3%. As a result, the present invention was completed.

焼成ドロマイト、生石灰、酸化マグネシウム、普通ポルトランドセメントが刺激剤として有効な理由について検討したところ、ｐＨが関係があるのではないかと推論し、そこで圧縮強度とｐＨとの関係を図３のグラフ図に示す。これによると、ｐＨが１２以下になる大谷石、ゼオライト（Ｎａ、Ｋ、Ｃａ）は刺激剤としては不適である一方、ｐＨが１２以上になる生石灰、焼成ドロマイト、ポルトランドセメントは刺激剤として好ましいといえる。   When we examined the reasons why calcined dolomite, quicklime, magnesium oxide and ordinary Portland cement are effective as stimulants, we inferred that pH is related, and the relationship between compressive strength and pH is shown in the graph of Fig. 3. Show. According to this, Otani stone and zeolite (Na, K, Ca) having a pH of 12 or less are not suitable as stimulants, while quick lime, calcined dolomite, and Portland cement having a pH of 12 or more are preferable as stimulants. I can say that.

そこで次に、刺激剤として好ましい焼成ドロマイトを採用し、養生温度と廃石膏置換率との関係について検討した。フライアッシュ、高炉スラグ、石膏および焼成ドロマイトの添加割合については前述した割合を用い、養生温度を２０℃、４０℃、６０℃、８０℃とした場合において、廃石膏の市販石膏に対する置換率を０、２０、５０、１００％としたものについて、材齢４日と２８日のものの生成物の圧縮強度を測定した。その結果を図４のグラフ図に示す。
材齢４日のものについて着目すると、廃石膏の置換率が増大するに伴い圧縮強度が低下していることが確認される。これは廃石膏の添加量が多くなることで強度発現が遅延していることを意味し、この強度発現の遅延は養生温度が高くなるにつれ改善していることが確認されるが、８０℃になると低下している。このことから、廃石膏を使用する場合に、養生温度は４０℃〜６０℃程度が好ましいといえる。 Then, the calcined dolomite preferred as a stimulant was adopted, and the relationship between the curing temperature and the waste gypsum replacement rate was examined. As for the addition ratio of fly ash, blast furnace slag, gypsum and calcined dolomite, when the curing temperature is 20 ° C., 40 ° C., 60 ° C. and 80 ° C., the replacement rate of waste gypsum with respect to commercial gypsum is 0. , 20, 50, and 100%, the compressive strength of the products having a material age of 4 days and 28 days was measured. The result is shown in the graph of FIG.
When attention is paid to those having a material age of 4 days, it is confirmed that the compressive strength is lowered as the replacement rate of waste gypsum increases. This means that the increase in the amount of waste gypsum increases the strength development, and this strength development is confirmed to improve as the curing temperature increases. It becomes lower. From this, when using waste gypsum, it can be said that the curing temperature is preferably about 40 ° C to 60 ° C.

フライアッシュ、高炉スラグ、石膏の混合割合において硬化体の強度が出る範囲を示したグラフ図である。It is the graph which showed the range which the intensity | strength of a hardening body comes out in the mixing ratio of fly ash, blast furnace slag, and gypsum. 刺激剤の種類とその添加率を変化させた場合における硬化物の材齢７日の圧縮強度との関係を示すグラフ図である。It is a graph which shows the relationship between the kind of stimulant and the compressive strength of the hardened | cured material at the age of 7 days in the case of changing the addition rate. 刺激剤のｐＨと硬化物の圧縮強度との関係を示すグラフ図である。It is a graph which shows the relationship between pH of a stimulant, and the compressive strength of hardened | cured material. 養生温度と廃石膏置換率とを変化させた場合における硬化物の圧縮強度の関係を示すグラフ図である。It is a graph which shows the relationship of the compressive strength of hardened | cured material at the time of changing curing temperature and waste gypsum substitution rate.

Claims (6)

石膏、スラグ、フライアッシュの粉末混合物に水を添加してペースト状にしたものに、酸化マグネシウムと酸化カルシウムあるいは水酸化カルシウムとの混合物を刺激剤として０．５〜３重量％を添加し、養生温度を４０〜６０℃として養生して得られることを特徴とする無機複合硬化物。   Add 0.5 to 3 wt% of a mixture of magnesium oxide and calcium oxide or calcium hydroxide as a stimulant to a mixture of gypsum, slag, and fly ash powder that has been made into a paste by adding water. An inorganic composite cured product obtained by curing at a temperature of 40 to 60 ° C. 刺激剤はドロマイトの焼成物または消化物であることを特徴とする請求項１記載の無機複合硬化物。   2. The inorganic composite cured product according to claim 1, wherein the stimulant is a burned or digested product of dolomite. 石膏は廃石膏であることを特徴とする請求項１または２記載の無機複合硬化物。   The inorganic composite cured product according to claim 1 or 2, wherein the gypsum is waste gypsum. 石膏、スラグ、フライアッシュの粉末混合物に水を添加してペースト状にしたものに、酸化マグネシウムと酸化カルシウムまたは水酸化カルシウムとの混合物を刺激剤として０．５〜３％を添加し、養生温度を４０〜６０℃として養生して得ることを特徴とする無機複合硬化物の製造方法。   Add 0.5 to 3% of a mixture of magnesium oxide and calcium oxide or calcium hydroxide as a stimulant to a mixture of gypsum, slag, and fly ash powder that has been added to water, and curing temperature Is obtained by curing at a temperature of 40 to 60 ° C. 刺激剤はドロマイトの焼成物または消化物であることを特徴とする請求項４記載の無機複合硬化物の製造方法。   5. The method for producing an inorganic composite cured product according to claim 4, wherein the stimulant is a baked or digested product of dolomite. 石膏は廃石膏であることを特徴とする請求項４または５記載の無機複合硬化物の製造方法。   6. The method for producing an inorganic composite cured product according to claim 4, wherein the gypsum is waste gypsum.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010201320A (en) * 2009-03-02 2010-09-16 Okano Kosan Kk Method of solidifying powder of waste gypsum board
CN113896460A (en) * 2021-06-24 2022-01-07 辽宁海天阁环保科技有限公司 Waste incineration fly ash solidified body pouring material, preparation method and application
JP7465322B1 (en) 2022-10-24 2024-04-10 株式会社トクヤマ Method for producing modified incineration ash, and modified incineration ash
JP7465402B1 (en) 2023-10-11 2024-04-10 株式会社トクヤマ Manufacturing method for modified wood biomass ash
JP7465386B1 (en) 2023-03-31 2024-04-10 株式会社トクヤマ Manufacturing method of modified incineration ash

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JPH08175855A (en) * 1994-12-26 1996-07-09 Yoshitaka Masuda High sulfate slag cement/high early strength slag ash cement and production of the same cement

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WO1980002419A1 (en) * 1979-05-09 1980-11-13 Japan Process Eng Co Ltd Hydraulic inorganic composition
JPH08175855A (en) * 1994-12-26 1996-07-09 Yoshitaka Masuda High sulfate slag cement/high early strength slag ash cement and production of the same cement

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010201320A (en) * 2009-03-02 2010-09-16 Okano Kosan Kk Method of solidifying powder of waste gypsum board
CN113896460A (en) * 2021-06-24 2022-01-07 辽宁海天阁环保科技有限公司 Waste incineration fly ash solidified body pouring material, preparation method and application
JP7465322B1 (en) 2022-10-24 2024-04-10 株式会社トクヤマ Method for producing modified incineration ash, and modified incineration ash
JP7465386B1 (en) 2023-03-31 2024-04-10 株式会社トクヤマ Manufacturing method of modified incineration ash
JP7465402B1 (en) 2023-10-11 2024-04-10 株式会社トクヤマ Manufacturing method for modified wood biomass ash

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