JPH1111993A - Coal ash hardened body composition - Google Patents
Coal ash hardened body compositionInfo
- Publication number
- JPH1111993A JPH1111993A JP9162817A JP16281797A JPH1111993A JP H1111993 A JPH1111993 A JP H1111993A JP 9162817 A JP9162817 A JP 9162817A JP 16281797 A JP16281797 A JP 16281797A JP H1111993 A JPH1111993 A JP H1111993A
- Authority
- JP
- Japan
- Prior art keywords
- coal ash
- content
- coal
- water
- cao
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/28—Cements from oil shales, residues or waste other than slag from combustion residues, e.g. ashes or slags from waste incineration
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Combustion & Propulsion (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、実質的に硬化材料
が石炭灰であり、セメントを含有しないか若しくは少量
の含有で硬化させることができ、各種建築物、特に人工
魚礁、人工海底山脈のブロック等に利用可能な石炭灰硬
化体組成物に関する。BACKGROUND OF THE INVENTION The present invention relates to a method for producing various kinds of buildings, especially artificial fish reefs and artificial submarine mountains, in which the hardening material is coal ash, which can be hardened with no or little cement. The present invention relates to a cured coal ash composition that can be used for blocks and the like.
【０００２】[0002]
【従来の技術】従来、フライアッシュを硬化材料の主成
分とする石炭灰硬化体が知られ、特に海水と接する港湾
工事等に使用されている。この石炭灰硬化体は、硬化材
料としてフライアッシュを含む他、少なくともセメント
を１０〜２０％程度含有させる必要がある。このような
フライアッシュを大量に含む場合、その硬化体を得る方
法としては、最適含水比に近い少ない水で練り混ぜ、振
動させて締固める方法が採用されている。このフライア
ッシュは、石炭を燃料として使用する火力発電所等の副
産物として主に得られており、その規格はＪＩＳ規格に
おいて、比重１．９５以上、比表面積２５００ｃｍ2／
ｇ以上、４５μｍふるい残分４０％以下、ＳｉＯ2４５
％以上であることが規定されている。2. Description of the Related Art Heretofore, there has been known a hardened coal ash containing fly ash as a main component of a hardening material, and is used particularly in harbor construction or the like in contact with seawater. This hardened coal ash needs to contain at least about 10 to 20% of cement in addition to fly ash as a hardened material. When such a large amount of fly ash is contained, as a method for obtaining a cured product thereof, a method of kneading with a small amount of water having a water content close to the optimum water content ratio, and vibrating and compacting is adopted. This fly ash is mainly obtained as a by-product of a thermal power plant or the like that uses coal as a fuel, and its standard is JIS standard of 1.95 or more and specific surface area of 2500 cm 2 /
g, 45 μm sieve residue 40% or less, SiO 2 45
% Or more.
【０００３】ところで、石炭を燃料として使用する火力
発電所等の副産物が全てフライアッシュとして使用でき
るものではなく、加圧流動床発電所からの副産物は、フ
ライアッシュに比べてＳｉＯ2の含有割合が低く、Ｃａ
Ｏ及びＳＯ3の含有割合が高いために、前記フライアッ
シュの規格をほとんど充足しない。これは、ボイラー内
の燃焼温度が従来より低く、しかも脱硫のために石灰石
粉を用いているためと考えられる。このようなフライア
ッシュの規格を充足しない副産物は、当然、従来のフラ
イアッシュとしての使用ができるとは考えられておら
ず、その有効利用方法が確立されていないのが実状であ
る。[0003] Incidentally, not all by-products such as thermal power plants using coal as fuel can be used as fly ash, and the by-products from pressurized fluidized bed power plants have a higher SiO 2 content than fly ash. Low, Ca
Since the content ratios of O and SO 3 are high, the specifications of the fly ash are hardly satisfied. This is presumably because the combustion temperature in the boiler is lower than before, and limestone powder is used for desulfurization. Naturally, such by-products that do not satisfy the fly ash standards are not considered to be usable as conventional fly ash, and the actual utilization method has not been established.
【０００４】[0004]
【発明が解決しようとする課題】本発明の目的は、特定
の石炭灰を配合することにより、セメントを全く配合さ
せなくても、また少量のセメント配合で従来のフライア
ッシュを主成分とする石炭灰硬化体と同程度の強度を有
する石炭灰硬化体を安価に得ることができる石炭灰硬化
体組成物を提供することにある。本発明の別の目的は、
従来火力発電所等における加圧流動床からの副産物にお
いてフライアッシュとして使用できなかった石炭灰を利
用した石炭灰硬化体組成物を提供することにある。SUMMARY OF THE INVENTION It is an object of the present invention to provide a conventional coal containing fly ash as a main component by blending a specific coal ash without blending cement at all and by blending a small amount of cement. An object of the present invention is to provide a hardened coal ash composition that can obtain a hardened coal ash having the same strength as the hardened ash at low cost. Another object of the invention is
It is an object of the present invention to provide a hardened coal ash composition using coal ash which could not be used as fly ash in by-products from a pressurized fluidized bed in a thermal power plant or the like.
【０００５】[0005]
【課題を解決するための手段】本発明によれば、ＳｉＯ
2、Ａｌ2Ｏ3、Ｆｅ2Ｏ3、ＣａＯ及びＳＯ3を含み、Ｓｉ
Ｏ2含有割合が３０〜４０重量％、ＣａＯ含有割合が１
０〜３０重量％、ＳＯ3含有割合が３．０〜１０重量％
である化学組成を有する石炭灰から実質的になる硬化材
料と、水と、硬化促進剤とを含み、前記水の含有割合が
最適含水比＋０〜５％である石炭灰硬化体組成物が提供
される。前記硬化材料の石炭灰の３０重量％以下はセメ
ントで置換されていても良い。また前記石炭灰として
は、石炭を脱硫のための石灰石粉と共に加圧流動床にお
いて燃焼反応させた後に集塵設備から採取した石炭灰で
あり、比表面積が２０００〜４０００ｃｍ2／ｇ或いは
比表面積が１００００ｃｍ2／ｇ以上であるものを使用
できる。According to the present invention, SiO 2 is used.
2 , containing Al 2 O 3 , Fe 2 O 3 , CaO and SO 3 ;
O 2 content ratio is 30 to 40% by weight, CaO content ratio is 1
0-30 wt%, SO 3 content is 3.0 to 10 wt%
A hardened coal ash composition comprising a hardened material substantially consisting of coal ash having a chemical composition of: water, and a hardening accelerator, wherein the content of water is an optimum water content ratio of +0 to 5%. Is done. Up to 30% by weight of the coal ash of the hardened material may be replaced by cement. Further, the coal ash is coal ash collected from a dust collecting facility after a coal is subjected to a combustion reaction in a pressurized fluidized bed together with limestone powder for desulfurization, and has a specific surface area of 2000 to 4000 cm 2 / g or a specific surface area of Those having a size of 10,000 cm 2 / g or more can be used.
【０００６】[0006]
【発明の実施の形態】本発明の石炭硬化体組成物は、特
定の石炭灰から実質的になる硬化材料を含む。特定の石
炭灰は、ＳｉＯ2、Ａｌ2Ｏ3、Ｆｅ2Ｏ3、ＣａＯ及びＳ
Ｏ3を含み、ＳｉＯ2含有割合が３０〜４０重量％、Ｃａ
Ｏ含有割合が１０〜３０重量％、ＳＯ3含有割合が３．
０〜１０重量％である化学組成を有する（以下石炭灰Ａ
と称す）。ＳｉＯ2、ＣａＯ及びＳＯ3以外に含有される
成分の含有割合は特に限定されるものではなく、通常の
フライアッシュの組成と同程度の含有割合で十分であ
る。例えばＡｌ2Ｏ3含有割合は１５〜３５重量％、Ｆｅ
2Ｏ3含有割合は１〜１０重量％が好ましい。石炭灰Ａに
おいて、ＳｉＯ2、Ａｌ2Ｏ3、Ｆｅ2Ｏ3、ＣａＯ及びＳ
Ｏ3の合計の含有割合は、通常９０〜９８重量％程度で
あり、残部は特に限定されない。石炭灰Ａの比表面積
は、好ましくは２０００〜４０００ｃｍ2／ｇ、若しく
は１００００ｃｍ2／ｇ以上のものの使用が好ましい。
特に、比表面積２０００〜４０００ｃｍ2／ｇの石炭灰
Ａを用いることにより、硬化材料を石炭灰Ａのみとし、
セメントを含有させなくても所望の硬化体を得ることが
できる。石炭灰Ａの粒径は特に限定されないが、例えば
比表面積１００００ｃｍ2／ｇ以上の場合は４５μｍふ
るいを全て通過する粒径が好ましい。BEST MODE FOR CARRYING OUT THE INVENTION The hardened coal composition of the present invention contains a hardened material substantially consisting of a specific coal ash. Specific coal ash is SiO 2 , Al 2 O 3 , Fe 2 O 3 , CaO and S
Containing O 3 , a SiO 2 content ratio of 30 to 40% by weight, Ca
The O content is 10 to 30% by weight, and the SO 3 content is 3.
It has a chemical composition of 0 to 10% by weight (hereinafter referred to as coal ash A
). The content ratio of components other than SiO 2 , CaO and SO 3 is not particularly limited, and a content ratio similar to the composition of ordinary fly ash is sufficient. For example, the content ratio of Al 2 O 3 is 15 to 35% by weight,
The content ratio of 2 O 3 is preferably 1 to 10% by weight. In coal ash A, SiO 2 , Al 2 O 3 , Fe 2 O 3 , CaO and S
The total content of O 3 is usually about 90 to 98% by weight, and the balance is not particularly limited. The specific surface area of the coal ash A is preferably 2000~4000cm 2 / g, or the use of 10000 cm 2 / g or more is preferable.
In particular, by using coal ash A having a specific surface area of 2000 to 4000 cm 2 / g, the hardened material is made only of coal ash A,
A desired cured product can be obtained without containing cement. The particle size of the coal ash A is not particularly limited, but, for example, when the specific surface area is 10,000 cm 2 / g or more, a particle size that passes through a 45 μm sieve is preferable.
【０００７】前記石炭灰Ａは、石炭を加圧流動床で燃焼
反応させた後に集塵設備から採取することにより得るこ
とができる。好ましくは、石炭を脱硫のための石灰石粉
と共に加圧流動床において燃焼反応させた後に集塵設備
から採取することに得られるものが望ましく、特に加圧
流動床複合発電所において、石炭を加圧流動床で燃焼反
応させた後に集塵設備から採取することにより得られる
ものが好ましい。例えば、前記加圧流動床複合発電所の
集塵設備から採取する場合、比表面積２０００〜４００
０ｃｍ2／ｇの石炭灰Ａは第１の集塵設備（１次サイク
ロン）から採取することができ、比表面積１００００ｃ
ｍ2／ｇ以上の石炭灰Ａは第２の集塵設備（２次サイク
ロン）から採取することができる。このように加圧流動
床からの副産物を再利用することにより、本発明の石炭
灰硬化体組成物のコストを下げることができると共に、
環境的にも好ましい。The coal ash A can be obtained by subjecting coal to a combustion reaction in a pressurized fluidized bed and then collecting the coal from a dust collecting facility. Preferably, what is obtained by combusting the coal with limestone powder for desulfurization in a pressurized fluidized bed and then collecting it from a dust collecting facility, particularly in a pressurized fluidized bed combined cycle power plant, is to pressurize the coal. What is obtained by taking out from a dust collection facility after performing a combustion reaction in a fluidized bed is preferable. For example, when collecting from the dust collection equipment of the pressurized fluidized bed combined cycle power plant, the specific surface area is 2000 to 400.
0 cm 2 / g of coal ash A can be collected from the first dust collection facility (primary cyclone) and has a specific surface area of 10,000 c
Coal ash A of m 2 / g or more can be collected from the second dust collection facility (secondary cyclone). By recycling the by-product from the pressurized fluidized bed in this way, the cost of the coal ash cured product composition of the present invention can be reduced,
Environmentally favorable.
【０００８】硬化材料として、前記石炭灰Ａの一部をセ
メントで置換することもできる。セメントとしては、普
通ポルトランドセメント、早強ポルトランドセメント、
中庸熱ポルトランドセメント等の各種ポルトランドセメ
ントや特殊セメントを用いることができる。セメントの
配合割合は、石炭灰Ａの３０重量％以下を置換する量が
好ましく、通常セメントを含有させる場合には、比表面
積２０００〜４０００ｃｍ2／ｇの石炭灰Ａでは０〜１
５重量％を置換する割合、比表面積１００００ｃｍ2／
ｇ以上の石炭灰Ａでは１０〜３０重量％を置換する割合
で含有させることができる。As the hardening material, a part of the coal ash A can be replaced with cement. As the cement, ordinary Portland cement, early strength Portland cement,
Various portland cements such as moderate heat portland cement and special cements can be used. The compounding ratio of the cement is preferably an amount that replaces 30% by weight or less of the coal ash A. Usually, when cement is contained, 0 to 1 is used for coal ash A having a specific surface area of 2000 to 4000 cm 2 / g.
5% by weight replacement ratio, specific surface area 10000 cm 2 /
g or more of coal ash A can be contained at a rate of replacing 10 to 30% by weight.
【０００９】本発明の石炭灰硬化体組成物は、前記硬化
材料を硬化させるために水及び硬化促進剤を含有する。
水は、硬化材料の反応に悪影響を与える物質が含有され
ていなければ良く、水道水、地下水、河川水、回収水、
海水等の何れであっても良い。特に各種アルカリ、アル
カリ土類金属ハロゲン化物等の無機塩類、具体的には塩
化ナトリウム、塩化カルシウム等を含有する場合には、
これらが後述する硬化促進剤に相当するので、別に硬化
促進剤を配合する必要がない。この点を考慮すると海水
（塩化物濃度３．３％程度）の使用が好ましい。水の含
有割合は、最適含水比＋０〜５％とする必要がある。好
ましくは最適含水比＋０〜３％である。５％を超えると
セメントの割合を多くする必要があり、所望の効果が得
られない。最適含水比とは、ＪＩＳ Ａ １２０１（突き
固めによる土の締固め試験方法）に準じて硬化材料にお
ける石炭灰Ａの水結合比と乾燥密度との関係から測定し
て決定できる。例えば、比表面積２０００〜４０００ｃ
ｍ2／ｇの石炭灰Ａの最適含水比は１８〜３２％程度で
あり、比表面積１００００ｃｍ2／ｇ以上の石炭灰Ａの
場合最適含水比はやや大きくなる。[0009] The hardened coal ash composition of the present invention contains water and a hardening accelerator to harden the hardened material.
Water should not contain substances that adversely affect the reaction of the cured material, such as tap water, groundwater, river water, recovered water,
Any of seawater and the like may be used. In particular, when containing various alkali, inorganic salts such as alkaline earth metal halides, specifically, sodium chloride, calcium chloride and the like,
Since these correspond to the curing accelerator described later, it is not necessary to separately add a curing accelerator. Considering this point, it is preferable to use seawater (chloride concentration of about 3.3%). It is necessary that the water content ratio be the optimum water content ratio +0 to 5%. Preferably, the optimum water content is +0 to 3%. If it exceeds 5%, the proportion of cement must be increased, and the desired effect cannot be obtained. The optimum water content can be determined by measuring the relationship between the water binding ratio of coal ash A in the hardened material and the dry density according to JIS A 1201 (test method for compaction of soil by compaction). For example, specific surface area 2000-4000c
The optimum water content of coal ash A of m 2 / g is about 18 to 32%, and the optimum water content of coal ash A having a specific surface area of 10,000 cm 2 / g or more is slightly larger.
【００１０】硬化促進剤は、前記硬化材料と水との硬化
反応を促進させるものであって、各種アルカリ、アルカ
リ土類金属ハロゲン化物等の無機塩類が挙げられ、具体
的には塩化ナトリウム、塩化カルシウム等が好ましい。
硬化促進剤の水に対する含有割合は、所望効果を発揮し
得る範囲であれば特に限定されず、例えば２〜５重量％
が望ましい。前述のとおり、硬化促進剤含有の水として
海水を使用するのが好ましい。The curing accelerator promotes the curing reaction between the above-mentioned curing material and water, and includes various kinds of inorganic salts such as alkali and alkaline earth metal halides. Calcium and the like are preferred.
The content ratio of the curing accelerator to water is not particularly limited as long as the desired effect can be exhibited, and is, for example, 2 to 5% by weight.
Is desirable. As described above, it is preferable to use seawater as the water containing the curing accelerator.
【００１１】本発明の石炭灰硬化体組成物には、前記必
須成分以外に本発明の所望の効果を損ねない範囲で、通
常フライアッシュセメントの硬化体等に配合する添加剤
等を添加しても良い。The hardened coal ash composition of the present invention contains, besides the above essential components, additives and the like which are usually added to the hardened body of fly ash cement and the like within a range not to impair the desired effects of the present invention. Is also good.
【００１２】本発明の石炭灰硬化体組成物を硬化させる
には、通常の振動締固め方法等に準じて行うことがで
き、条件等は適宜選択することができる。得られる硬化
体は、種々の建築物に利用することができるが、特に人
工魚礁、人工海底山脈のブロック材等に有用である。[0012] The hardened coal ash composition of the present invention can be cured according to a conventional vibration compaction method and the like, and the conditions and the like can be appropriately selected. The obtained cured product can be used for various buildings, but is particularly useful for artificial fish reefs, artificial submarine mountain blocks, and the like.
【００１３】[0013]
【発明の効果】本発明の石炭硬化体組成物は、従来のフ
ライアッシュとは異なる化学組成を有する石炭灰を用い
るので、セメントを全く配合しないか、若しくは少量の
配合で所定強度を有する硬化体を得ることができる。使
用する石炭灰は、特定の加圧流動床の副生物を利用でき
るので、コスト的にも安価にでき、しかも硬化剤として
海水を使用する場合には更に有利である。As the hardened coal composition of the present invention uses a coal ash having a chemical composition different from that of conventional fly ash, no hardened cement with no cement or a small amount of hardened material having a predetermined strength is used. Can be obtained. Since the coal ash to be used can utilize by-products of a specific pressurized fluidized bed, the cost can be reduced in cost, and it is more advantageous when seawater is used as a hardening agent.
【００１４】[0014]
【実施例】以下、実施例により更に詳細に説明するが、
本発明はこれらに限定されるものではない。実施例１ 石炭を石灰石粉と共に燃焼反応させる加圧流動床発電所
の１次サイクロン及び２次サイクロンから産出される石
炭灰を回収した。回収した各石炭灰を蛍光Ｘ線分析装置
により化学成分を酸化物量に換算して分析した結果、１
次サイクロンからの石炭灰（１次石炭灰）は、ＳｉＯ2
３２．７重量％、Ａｌ2Ｏ3２５．５重量％、Ｆｅ2Ｏ
3７．６重量％、ＣａＯ２２．０重量％、ＭｇＯ０．４
重量％、ＳＯ3８．６重量％及びＫ2Ｏ０．２重量％であ
り、２次サイクロンからの石炭灰（２次石炭灰）は、Ｓ
ｉＯ2３７．０重量％、Ａｌ2Ｏ3３１．１重量％、Ｆｅ2
Ｏ3６．６重量％、ＣａＯ１３．８重量％、ＭｇＯ０．
４重量％、ＳＯ3６．９重量％及びＫ2Ｏ０．２重量％で
あった。また、１次石炭灰の比重は２．６７、比表面積
は２５５０ｃｍ2／ｇであり、４５μｍのふるいを通過
させた際の残分は５２．８％であった。一方、２次石炭
灰の比重は２．７２、比表面積は１５７８０ｃｍ2／ｇ
であり、４５μｍのふるいを全て通過する粒径であっ
た。得られた各石炭灰の最適含水比を、ＪＩＳ Ａ １２
０１（突き固めによる土の締固め試験方法）に準じて石
炭灰の水結合比と乾燥密度との関係から測定した結果、
１次石炭灰は２５％、２次石炭灰は４７％であった。The present invention will be described in more detail with reference to the following examples.
The present invention is not limited to these. Example 1 Coal ash produced from a primary cyclone and a secondary cyclone of a pressurized fluidized-bed power plant in which coal reacts with limestone powder by combustion is recovered. Each of the collected coal ash was analyzed by converting the chemical components into oxides using a fluorescent X-ray analyzer, and as a result, 1
The coal ash (primary coal ash) from the secondary cyclone is SiO 2
32.7% by weight, Al 2 O 3 25.5% by weight, Fe 2 O
3 7.6% by weight, 22.0% by weight of CaO, 0.4 of MgO
% By weight, 8.6% by weight of SO 3 and 0.2% by weight of K 2 O, and the coal ash (secondary coal ash) from the secondary cyclone is S
37.0% by weight of iO 2, 31.1% by weight of Al 2 O 3 , Fe 2
O 3 6.6% by weight, CaO 13.8% by weight, MgO 0.
4% by weight, 6.9% by weight of SO 3 and 0.2% by weight of K 2 O. The specific gravity of the primary coal ash was 2.67, the specific surface area was 2550 cm 2 / g, and the residue after passing through a 45 μm sieve was 52.8%. On the other hand, the secondary coal ash has a specific gravity of 2.72 and a specific surface area of 15780 cm 2 / g.
And the particle size was such that all the particles passed through a 45 μm sieve. The optimum water content ratio of each obtained coal ash was determined according to JIS A12
01 (testing method for compaction of soil by compaction)
The primary coal ash was 25% and the secondary coal ash was 47%.
【００１５】回収した各石炭灰を含む表１に示す組成の
硬化体組成物を調製し、φ５０×１００ｍｍに硬化させ
た。組成物の練り混ぜは、硬化材料を３０秒間空練りし
た後、硬化促進剤としての塩化ナトリウムを溶解した水
を添加し、１２０秒間本練りして行った。混合物の硬化
は、大型ＶＣ試験機を用いて締固め硬化させた。締固め
時の振動数は４０００ｒｐｍ、振幅は１．０ｍｍ、締固
め時間は、試料が液状化したことを確認後５分程度と
し、振動を付与した全時間は８〜１０分程度とした。得
られた各硬化体を、ＪＩＳ Ａ １１０８に準拠して材齢
７、２８及び９１日の圧縮強度を測定した。結果を表１
に示す。表１の結果より、従来のフライアッシュとは異
なる組成の石炭灰を配合した場合、１次石炭灰ではセメ
ントを配合せずに硬化体を得ることができ、また少ない
セメントの含有割合においても十分な強度を有する硬化
体が得られることが判った。A cured product composition containing the recovered coal ash and having the composition shown in Table 1 was prepared and cured to φ50 × 100 mm. The kneading of the composition was performed by kneading the cured material for 30 seconds, adding water in which sodium chloride as a curing accelerator was dissolved, and kneading for 120 seconds. The mixture was compacted and cured using a large VC tester. The frequency of compaction was 4000 rpm, the amplitude was 1.0 mm, the compaction time was about 5 minutes after confirming that the sample was liquefied, and the total time during which vibration was applied was about 8 to 10 minutes. For each of the obtained cured products, the compressive strengths of the ages 7, 28 and 91 days were measured according to JIS A 1108. Table 1 shows the results
Shown in From the results in Table 1, when coal ash having a composition different from that of the conventional fly ash is blended, a cured product can be obtained without blending cement with the primary coal ash, and a sufficient cement content can be obtained even with a small cement content. It was found that a cured product having excellent strength was obtained.
【００１６】[0016]
【表１】 [Table 1]
───────────────────────────────────────────────────── フロントページの続き (72)発明者 福留 和人 東京都港区北青山２−５−８ 株式会社間 組内 (72)発明者 喜多 達夫 東京都港区北青山２−５−８ 株式会社間 組内 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Kazuto Fukudome 2-5-8 Kita-Aoyama, Minato-ku, Tokyo Between companies Co., Ltd. (72) Inventor Tatsuo Kita 2-5-8 Kita-Aoyama, Minato-ku, Tokyo Between companies Within the group
Claims (4)
及びＳＯ3を含み、ＳｉＯ2含有割合が３０〜４０重量
％、ＣａＯ含有割合が１０〜３０重量％、ＳＯ3含有割
合が３．０〜１０重量％である化学組成を有する石炭灰
から実質的になる硬化材料と、水と、硬化促進剤とを含
み、前記水の含有割合が最適含水比＋０〜５％である石
炭灰硬化体組成物。1. A method according to claim 1, wherein the first and second layers are SiO 2 , Al 2 O 3 , Fe 2 O 3 , and CaO.
And it includes SO 3, substantially from coal ash having SiO 2 content is 30 to 40 wt%, CaO content is 10 to 30 wt%, the chemical composition SO 3 content is 3.0 to 10 wt% A cured coal ash composition comprising a cured material, water and a curing accelerator, wherein the content of water is an optimal water content +0 to 5%.
をセメントで置換した請求項１に記載の石炭灰硬化体組
成物。2. The cured coal ash composition according to claim 1, wherein 30% by weight or less of the coal ash of the cured material is replaced with cement.
石粉と共に加圧流動床において燃焼反応させた後に集塵
設備から採取した石炭灰であり、比表面積が２０００〜
４０００ｃｍ2／ｇであることを特徴とする請求項１又
は２に記載の石炭灰硬化体組成物。3. The coal ash is coal ash collected from a dust collector after a combustion reaction of coal with limestone powder for desulfurization in a pressurized fluidized bed, and has a specific surface area of 2000 to 2000.
The cured coal ash composition according to claim 1, wherein the composition is 4000 cm 2 / g.
石粉と共に加圧流動床において燃焼反応させた後に集塵
設備から採取した石炭灰であり、比表面積が１００００
ｃｍ2／ｇ以上であることを特徴とする請求項２に記載
の石炭灰硬化体組成物。4. The coal ash is coal ash collected from a dust collecting facility after a combustion reaction of coal with limestone powder for desulfurization in a pressurized fluidized bed, and has a specific surface area of 10,000.
coal ash cured composition according to claim 2, characterized in that at cm 2 / g or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16281797A JP3936777B2 (en) | 1997-06-19 | 1997-06-19 | Coal ash hardened body composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16281797A JP3936777B2 (en) | 1997-06-19 | 1997-06-19 | Coal ash hardened body composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1111993A true JPH1111993A (en) | 1999-01-19 |
| JP3936777B2 JP3936777B2 (en) | 2007-06-27 |
Family
ID=15761802
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16281797A Expired - Lifetime JP3936777B2 (en) | 1997-06-19 | 1997-06-19 | Coal ash hardened body composition |
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| Country | Link |
|---|---|
| JP (1) | JP3936777B2 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002274899A (en) * | 2001-03-13 | 2002-09-25 | Chugoku Electric Power Co Inc:The | Coal ash-containing composition and method for constructing roadbed of road using the same composition |
| US6881008B1 (en) | 2003-11-26 | 2005-04-19 | Sequoia Pacific Research Company, Ltd. | Particle binding compositions and methods of making and using such compositions |
| US7005005B2 (en) | 2003-11-26 | 2006-02-28 | Sequoia Pacific Research Company, Llc | Soil bind and revegetation compositions and methods of making and using such compositions |
| US7021864B2 (en) | 2003-11-26 | 2006-04-04 | Sequoia Pacific Research Company, Llc | Soil binding and revegetation compositions and methods of making and using such compositions |
| JP2007100402A (en) * | 2005-10-05 | 2007-04-19 | Chugoku Electric Power Co Inc:The | Soil improving particulate matter |
| JP2007197263A (en) * | 2006-01-27 | 2007-08-09 | Chuden Kankyo Technos Co Ltd | Mortar composition |
| JP2009137827A (en) * | 2007-11-15 | 2009-06-25 | Makoto Ichitsubo | Method for manufacturing concrete secondary product and concrete secondary product |
| JP2009137826A (en) * | 2007-11-15 | 2009-06-25 | Makoto Ichitsubo | Method for manufacturing concrete secondary product and the concrete secondary product |
| JP2016222494A (en) * | 2015-05-29 | 2016-12-28 | 一般財団法人電力中央研究所 | Production method of coal ash solidified substance |
| JP2017082504A (en) * | 2015-10-29 | 2017-05-18 | 日本国土開発株式会社 | Artificial ground material manufacturing method |
-
1997
- 1997-06-19 JP JP16281797A patent/JP3936777B2/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002274899A (en) * | 2001-03-13 | 2002-09-25 | Chugoku Electric Power Co Inc:The | Coal ash-containing composition and method for constructing roadbed of road using the same composition |
| US6881008B1 (en) | 2003-11-26 | 2005-04-19 | Sequoia Pacific Research Company, Ltd. | Particle binding compositions and methods of making and using such compositions |
| US7005005B2 (en) | 2003-11-26 | 2006-02-28 | Sequoia Pacific Research Company, Llc | Soil bind and revegetation compositions and methods of making and using such compositions |
| US7021864B2 (en) | 2003-11-26 | 2006-04-04 | Sequoia Pacific Research Company, Llc | Soil binding and revegetation compositions and methods of making and using such compositions |
| JP2007100402A (en) * | 2005-10-05 | 2007-04-19 | Chugoku Electric Power Co Inc:The | Soil improving particulate matter |
| JP2007197263A (en) * | 2006-01-27 | 2007-08-09 | Chuden Kankyo Technos Co Ltd | Mortar composition |
| JP2009137827A (en) * | 2007-11-15 | 2009-06-25 | Makoto Ichitsubo | Method for manufacturing concrete secondary product and concrete secondary product |
| JP2009137826A (en) * | 2007-11-15 | 2009-06-25 | Makoto Ichitsubo | Method for manufacturing concrete secondary product and the concrete secondary product |
| JP2016222494A (en) * | 2015-05-29 | 2016-12-28 | 一般財団法人電力中央研究所 | Production method of coal ash solidified substance |
| JP2017082504A (en) * | 2015-10-29 | 2017-05-18 | 日本国土開発株式会社 | Artificial ground material manufacturing method |
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