JP4117141B2 - Immediate removal concrete product - Google Patents
Immediate removal concrete product Download PDFInfo
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- JP4117141B2 JP4117141B2 JP2002068706A JP2002068706A JP4117141B2 JP 4117141 B2 JP4117141 B2 JP 4117141B2 JP 2002068706 A JP2002068706 A JP 2002068706A JP 2002068706 A JP2002068706 A JP 2002068706A JP 4117141 B2 JP4117141 B2 JP 4117141B2
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- cement
- mass
- incineration ash
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- 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
-
- 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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- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、廃棄物起源材料を多量（構成材料の70質量％以上）に用いた即脱コンクリート製品に関するものである。なお、本発明では、モルタル製品を含めてコンクリート製品という。
【０００２】
【従来の技術】
近年、資源の有効利用の観点から、種々の廃棄物がセメントコンクリート用材料として利用されている。その一例として、ゴミ焼却場、火力発電所、下水処理場等から排出する焼却灰を溶融して得られるスラグを骨材として用いた即脱コンクリート平板が知られている。
【発明が解決しようとする課題】
【０００３】
しかし、上記スラグを骨材として用いた従来の即脱コンクリート平板では、廃棄物起源材料の使用割合が構成材料中の50〜60質量％程度であり、廃棄物起源材料の使用割合を増加することが求められていた。
【０００４】
【課題を解決するための手段】
本発明者らは、廃棄物起源材料を多量に用いた即脱コンクリート製品について鋭意研究した結果、本発明を完成させたものである。
【０００５】
即ち、本発明は、セメントとして、都市ゴミ焼却灰、下水汚泥焼却灰の一種以上を原料として製造した焼成物の粉砕物と石膏とからなるセメントを用い、骨材として、都市ゴミ、都市ゴミ焼却灰、下水汚泥焼却灰の一種以上を溶融して製造した溶融スラグ、あるいは高炉スラグ、製鋼スラグ、銅スラグ、碍子屑から選ばれる一種以上を用いた即脱コンクリート製品であって、前記焼成物が、 3CaO ・ Al 2 O 3 を 10 〜 25 質量％、 4CaO ・ Al 2 O 3 ・ Fe 2 O 3 を 10 〜 20 質量％含み、 3CaO ・ Al 2 O 3 と 4CaO ・ Al 2 O 3 ・ Fe 2 O 3 の合計量が 20 〜 35 質量％で、塩素量が 0.1 質量％以下であり、さらに、 2CaO ・ SiO 2 及び／又は 3CaO ・ SiO 2 を含むものであり、
前記骨材の最大粒径が10mm以下であり、かつ、水／セメント比が25〜45質量％、単位水量が100〜180kg/m3、単位セメント量が300〜600kg/m3、ペースト／骨材比が45〜65容積％であることを特徴とする即脱コンクリート製品である（請求項１）。
さらに、本発明は、高炉スラグ粉末、石炭灰、鋳物粉末から選ばれる一種以上の混和材を含む請求項１に記載の即脱コンクリート製品である（請求項２）。
【０００６】
【発明の実施の形態】
以下、本発明について詳細に説明する。
なお、本発明において廃棄物起源材料とは、廃棄物を原料として得られる材料のことをいう。
本発明の即脱コンクリート製品においては、骨材として、廃棄物起源材料を用いる。廃棄物起源材料としては、都市ゴミ、都市ゴミ焼却灰、下水汚泥焼却灰の一種以上を溶融して製造した溶融スラグ、あるいは高炉スラグ、製鋼スラグ、銅スラグ、碍子屑が挙げられ、これらを単独で用いても良いし、ニ種以上を組み合わせて用いても良い。
なお、溶融スラグは、冷却の方法によって水砕スラグと空冷スラグの２種があるが、本発明では両者とも使用可能である。
本発明においては、骨材として用いる廃棄物起源材料は、その最大粒径が10mm以下であり、即脱コンクリート製品の強度発現性等の観点から、５mm以下であることが好ましい。廃棄物起源材料の最大粒径が10mmを越えると、即脱コンクリート製品の強度発現性が低下し好ましくない。
【０００７】
本発明の即脱コンクリート製品においては、廃棄物起源材料の有効利用の促進の観点やコンクリートの作業性や強度発現性等の観点から、骨材として用いる廃棄物起源材料は、即脱コンクリート製品の全構成材料中の70〜80質量％であることが好ましい。
なお、本発明においては、後述のエコセメント等を使用して構成材料の70質量％以上に廃棄物起源材料を用いるのであれば、骨材として、一部川砂や砕砂等の従来より使用されている骨材を使用することは差し支えない。骨材として、一部川砂や砕砂等を使用することにより、コンクリートの作業性を向上させることができるうえ、即脱コンクリート製品の強度発現性を向上させることができる。
【０００８】
本発明の即脱コンクリート製品においては、セメントとしては、都市ゴミ焼却灰、下水汚泥焼却灰の一種以上を原料として製造した焼成物の粉砕物と石膏とからなるセメント（以降、エコセメントと称す）を用いることができる。本発明においては、セメントとしてエコセメントを用いることは、廃棄物起源材料の使用割合を高めることができ好ましいことである。
【０００９】
エコセメントについて、さらに詳しく説明する。
エコセメントは、都市ゴミ焼却灰、下水汚泥焼却灰の一種以上を原料として製造した焼成物の粉砕物と石膏とからなるセメントである。
焼成物の原料は、都市ゴミ焼却灰、下水汚泥焼却灰に加えて、貝殻や下水汚泥に生石灰を混合した下水汚泥乾粉、その他の一般廃棄物や産業廃棄物などが用いられ、さらには、普通のセメント原料である石灰石、粘土、珪石、アルミ灰、ボーキサイト、鉄等を混合して成分調整した原料を用いても良い。これらの原料を1200〜1450℃で焼成して得た焼成物を粉砕し石膏を添加するか、又は焼成物と石膏を同時に粉砕してエコセメントを製造する。
本発明において、エコセメントのブレーン比表面積は、コンクリートの作業性や強度発現性等の観点から、3000〜4500cm2/gが好ましい。
【００１０】
本発明において上記焼成物は、廃棄物起源材料の有効利用の促進の観点や、該焼成物の焼成のし易さの観点、さらには、コンクリートの作業性、凝結時間や強度発現性等の観点から、3CaO・Al2O3(以降、C3Aと略す)を10〜25質量％、4CaO・Al2O3・Fe2O3(以降、C4AFと略す)を10〜20質量％含み、C3AとC4AFの合計量が20〜35質量％で、塩素量が0.1質量％以下であり、さらに、2CaO・SiO2(以降、C2Sと略す)及び／又は3CaO・SiO2(以降、C3Sと略す)を含むものであることが好ましい。
【００１１】
本発明において石膏は、無水石膏、ニ水石膏、半水石膏のいずれでも良い。石膏の量は、コンクリートの作業性、凝結時間や強度発現性等の観点から、焼成物の粉砕物100質量部に対してSO3換算で1.5〜6.5質量部が好ましい。
【００１２】
本発明においては、前記骨材とセメントに加えて、高炉スラグ粉末、石炭灰、鋳物粉末から選ばれる一種以上の混和材を用いることは、廃棄物起源材料の使用割合を高めることができるうえ、強度発現性も向上するので好ましいことである。
混和材のブレーン比表面積は、コンクリートの作業性や強度発現性等の観点から、1000〜10000cm2/gが好ましく、2000〜8000cm2/gがより好ましい。
【００１３】
本発明においては、水は、水道水やコンクリートスラッジからの回収水等を用いることができる。
なお、本発明においては、セメントとしてエコセメント、水としてコンクリートスラッジからの回収水を用いることで、廃棄物起源材料のみで即脱コンクリート製品を製造することが可能である。
【００１４】
本発明の即脱コンクリート製品の配合割合は、廃棄物起源材料の有効利用の促進の観点や、コンクリートの作業性や強度発現性等の観点から、水／セメント比が25〜45質量％、単位水量が100〜180kg/m3、単位セメント量が300〜600kg/m3、混和材量が0〜200kg/m3、ペースト／骨材比が45〜65容積％であることが好ましい。
【００１５】
なお、本発明においては、コンクリートの作業性や強度発現性等の観点から、減水剤を使用することは差し支えない。減水剤としては、リグニン系、ナフタレンスルホン酸系、メラミン系、ポリカルボン酸系の減水剤（ＡＥ減水剤、高性能減水剤、高性能ＡＥ減水剤も含む）が挙げられる。本発明においては、施工性や早期強度発現性を考慮して、ナフタレンスルホン酸系又はポリカルボン酸系の減水剤を使用するのが好ましい。
なお、減水剤は、液状又は粉末状どちらでも使用可能である。
【００１６】
本発明の即脱コンクリート製品の製造方法について説明する。
まず、セメントと、骨材と、水を含む配合物の混練物を調製する。該混練物の調製に用いるミキサは、特に限定するものではなく、パンタイプミキサ、二軸ミキサ等の慣用のミキサで混練すれば良い。
混練方法は、特に限定するものではなく、例えば、▲１▼材料を一括してミキサに投入して１分以上混練する方法、▲２▼水以外の材料をミキサに投入して空練りした後に、水を投入して１分以上混練する方法等が挙げられる。
【００１７】
次に、混練物を所定の形状に成形する。成形方法は、従来の即脱コンクリート製品の成形方法と同様の方法（加圧成形、振動加圧成形等）で成形すれば良い。
成形後、即脱し、蒸気養生を行い硬化させることにより、本発明のコンクリート製品が得られる。
本発明において、蒸気養生条件は、特に限定するものではない。
【００１８】
【試験例】
以下、試験例により本発明を説明する。
１．使用材料
使用材料を以下に示す。
▲１▼セメントＡ；エコセメント
セメントＢ；普通ポルトランドセメント（太平洋セメント（株）製）
▲２▼骨材Ａ；銅スラグ（最大粒径5mm以下、粗粒率3.18）
骨材Ｂ；焼却灰溶融スラグ（最大粒径5mm以下、粗粒率3.58）
骨材Ｃ；製鋼スラグ（最大粒径5mm以下、粗粒率3.07）
▲３▼混和材Ａ；石炭灰（ブレーン比表面積4520cm2/g）
混和材Ｂ；高炉スラグ粉末（ブレーン比表面積4470cm2/g）
▲４▼水Ａ；水道水
水Ｂ；スラッジ回収水
【００１９】
エコセメントの製造方法を以下に示す。
表１に示す乾燥した都市ゴミ焼却灰32.0質量％、石灰石粉64.2質量％、鉄原料2.4質量％、ソーダ灰（炭酸ナトリウム99.6質量％含有：セントラル硝子社製）1.4質量％を配合して成分調整した原料をロータリーキルンを用いて、1300〜1450℃で焼成した。得られた焼成物を縦型ミルで粉砕した後、半水石膏を焼成物の粉砕物100質量部に対してSO3換算で2.1質量部添加・混合してエコセメントを製造した。エコセメントのブレーン比表面積は3900cm2/gであった。表２にエコセメントの鉱物組成を示す。
【００２０】
【表１】
【表２】
上記各材料を表３に示す割合で混練し、30×30×6cmの型枠に加圧成形した後即脱し、前置き２時間、昇温速度20℃／hr、最高温度65℃で３時間保持の条件で蒸気養生した。蒸気養生後、室温まで冷却し、材齢14日まで20℃で気中養生した。
これらのコンクリートについて、曲げ強度を測定した。
その結果を表３に示す。また、表３に全構成材料中の廃棄物起源材料の割合（質量％）も示した。
【００２３】
【表３】
表３より、本発明の即脱コンクリート製品では、廃棄物起源材料を多量（70質量％以上）に用いているにもかかわらず強度発現性が良好であることが分かる。
【００２５】
【発明の効果】
以上説明したように、本発明の即脱コンクリート製品では、廃棄物起源材料を多量（構成材料の70質量％以上）に用いることができるものである。特に、セメントとして、都市ゴミ焼却灰、下水汚泥焼却灰の一種以上を原料として使用したエコセメントを用いることにより、構成材料の90質量％以上に廃棄物起源材料を用いることが可能であり、資源の有効利用に大いに貢献する。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an immediate de-concrete product using a large amount of waste-origin materials (70% by mass or more of constituent materials). In addition, in this invention, it is called concrete products including mortar products.
[0002]
[Prior art]
In recent years, various wastes have been used as materials for cement concrete from the viewpoint of effective use of resources. As an example, an immediate-removal concrete plate using slag obtained by melting incineration ash discharged from a garbage incineration plant, thermal power plant, sewage treatment plant or the like as an aggregate is known.
[Problems to be solved by the invention]
[0003]
However, in the conventional quick-release concrete slab using the above slag as an aggregate, the usage rate of waste-derived materials is about 50 to 60% by mass in the constituent materials, and the usage rate of waste-derived materials should be increased. Was demanded.
[0004]
[Means for Solving the Problems]
The inventors of the present invention have completed the present invention as a result of earnest research on an immediate de-concrete product using a large amount of waste-origin materials.
[0005]
That is, the present invention uses a cement made of pulverized material and gypsum of a burned material produced using at least one of municipal trash incineration ash and sewage sludge incineration ash as a cement, and as an aggregate, city trash and city trash incineration. ash, molten slag was produced by melting one or more sewage sludge incineration ash or blast furnace slag, steel slag, copper slag, a ready removal of concrete products using one or more kinds selected from the insulator debris, the baked product the 3CaO · Al 2 O 3 10 ~ 25 wt%, include 4CaO · Al 2 O 3 · Fe 2 O 3 10 ~ 20 wt%, 3CaO · Al 2 O 3 and 4CaO · Al 2 O 3 · Fe 2 O a total amount of 3 20 to 35 mass%, chlorine content is not more than 0.1 mass%, further, is intended to include a 2CaO · SiO 2 and / or 3CaO · SiO 2,
The aggregate has a maximum particle size of 10 mm or less, a water / cement ratio of 25 to 45 mass%, a unit water amount of 100 to 180 kg / m 3 , a unit cement amount of 300 to 600 kg / m 3 , a paste / bone It is an immediate de-concrete product characterized in that the material ratio is 45 to 65% by volume (Claim 1).
Furthermore, the present invention is an immediate de-concrete product according to claim 1, which contains one or more admixtures selected from blast furnace slag powder, coal ash, and casting powder (claim 2) .
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail.
In addition, in this invention, a waste origin material means the material obtained from a waste as a raw material.
In the instant de-concrete product of the present invention, a waste-derived material is used as the aggregate. Examples of waste-origin materials include molten slag produced by melting one or more types of municipal waste, municipal waste incineration ash, and sewage sludge incineration ash, or blast furnace slag, steelmaking slag, copper slag, and insulator waste. It may be used in combination, or two or more may be used in combination.
There are two types of molten slag, granulated slag and air-cooled slag, depending on the cooling method, but both can be used in the present invention.
In the present invention, the waste-origin material used as the aggregate has a maximum particle size of 10 mm or less, and is preferably 5 mm or less from the viewpoint of the strength development of the immediately-removed concrete product. If the maximum particle size of the waste-origin material exceeds 10 mm, the strength development property of the immediate de-concrete product is lowered, which is not preferable.
[0007]
In the instant de-concrete product of the present invention, from the viewpoint of promoting the effective use of waste-origin materials and the workability and strength development of concrete, the waste-origin materials used as aggregates are instant de-concrete products. It is preferable that it is 70-80 mass% in all the constituent materials.
In the present invention, if a waste-origin material is used in 70% by mass or more of the constituent material using an eco-cement described later, the aggregate is partly used conventionally such as river sand and crushed sand. It is possible to use the aggregate that is present. By using partly river sand, crushed sand or the like as the aggregate, it is possible to improve the workability of the concrete, and it is possible to improve the strength development property of the immediately-removed concrete product.
[0008]
In the instant de-concrete product of the present invention, the cement is a cement composed of ground pulverized product and gypsum produced from one or more of municipal waste incineration ash and sewage sludge incineration ash (hereinafter referred to as eco-cement). Can be used. In the present invention, it is preferable to use eco-cement as the cement because the use ratio of the waste-origin material can be increased.
[0009]
The eco-cement will be described in more detail.
Ecocement is a cement made of pulverized material and gypsum of a fired product produced from one or more of municipal waste incineration ash and sewage sludge incineration ash.
In addition to municipal waste incineration ash and sewage sludge incineration ash, the raw material of the baked product is sewage sludge dry powder in which quick lime is mixed with shells and sewage sludge, other general waste and industrial waste, etc. A raw material prepared by mixing limestone, clay, silica, aluminum ash, bauxite, iron, or the like, which is a cement raw material, may be used. A calcined product obtained by calcining these raw materials at 1200 to 1450 ° C. is crushed and gypsum is added, or the calcined product and gypsum are pulverized simultaneously to produce ecocement.
In the present invention, the brain specific surface area of ecocement is preferably 3000 to 4500 cm 2 / g from the viewpoint of workability and strength development of concrete.
[0010]
In the present invention, the fired product is a viewpoint of promoting effective use of waste-origin materials, a viewpoint of ease of firing of the fired product, and a viewpoint of workability of concrete, setting time, strength development, etc. 3CaO · Al 2 O 3 (hereinafter abbreviated as C 3 A) 10-25% by mass, 4CaO · Al 2 O 3 · Fe 2 O 3 (hereinafter abbreviated as C 4 AF) 10-20% by mass In addition, the total amount of C 3 A and C 4 AF is 20 to 35% by mass, the chlorine amount is 0.1% by mass or less, and 2CaO · SiO 2 (hereinafter abbreviated as C 2 S) and / or 3CaO · It preferably contains SiO 2 (hereinafter abbreviated as C 3 S).
[0011]
In the present invention, the gypsum may be any of anhydrous gypsum, dihydrate gypsum, and hemihydrate gypsum. The amount of gypsum is preferably 1.5 to 6.5 parts by mass in terms of SO 3 with respect to 100 parts by mass of the pulverized product of the fired product from the viewpoints of workability of concrete, setting time, strength development, and the like.
[0012]
In the present invention, in addition to the aggregate and cement, using one or more admixtures selected from blast furnace slag powder, coal ash, and casting powder can increase the use ratio of the waste-origin material, This is preferable because strength development is also improved.
Blaine specific surface area admixtures, from the viewpoint of workability and strength development of concrete, preferably 1000~10000cm 2 / g, 2000~8000cm 2 / g is more preferable.
[0013]
In the present invention, tap water, recovered water from concrete sludge, or the like can be used as the water.
In the present invention, by using eco-cement as cement and water recovered from concrete sludge as water, it is possible to produce a de-concrete product with only waste-origin materials.
[0014]
The blending ratio of the instantly decremented concrete product of the present invention is such that the water / cement ratio is 25 to 45% by mass from the viewpoint of promoting the effective use of waste-derived materials and the workability and strength development of concrete. It is preferable that the water amount is 100 to 180 kg / m 3 , the unit cement amount is 300 to 600 kg / m 3 , the admixture amount is 0 to 200 kg / m 3 , and the paste / aggregate ratio is 45 to 65% by volume.
[0015]
In the present invention, a water reducing agent may be used from the viewpoint of workability and strength development of concrete. Examples of the water reducing agent include lignin-based, naphthalenesulfonic acid-based, melamine-based, and polycarboxylic acid-based water reducing agents (including AE water reducing agents, high-performance water reducing agents, and high-performance AE water reducing agents). In the present invention, it is preferable to use a naphthalenesulfonic acid-based or polycarboxylic acid-based water reducing agent in consideration of workability and early strength development.
The water reducing agent can be used in a liquid or powder form.
[0016]
The manufacturing method of the immediate de-concrete product of this invention is demonstrated.
First, a kneaded mixture of a mixture containing cement, aggregate, and water is prepared. The mixer used for the preparation of the kneaded material is not particularly limited, and may be kneaded with a conventional mixer such as a pan type mixer or a biaxial mixer.
The kneading method is not particularly limited. For example, (1) a method in which materials are collectively put into a mixer and kneaded for 1 minute or more, and (2) after materials other than water are put in the mixer and kneaded empty. And a method of adding water and kneading for 1 minute or more.
[0017]
Next, the kneaded product is formed into a predetermined shape. What is necessary is just to shape | mold the shaping | molding method by the method (Pressurization shaping | molding, vibration press molding, etc.) similar to the shaping | molding method of the conventional immediate removal concrete product.
After the molding, the concrete product of the present invention is obtained by removing immediately and curing by steam curing.
In the present invention, the steam curing conditions are not particularly limited.
[0018]
[Test example]
Hereinafter, the present invention will be described with reference to test examples.
1. Materials used Materials used are shown below.
(1) Cement A; Eco Cement Cement B; Ordinary Portland Cement (manufactured by Taiheiyo Cement Co., Ltd.)
(2) Aggregate A: Copper slag (maximum grain size 5mm or less, coarse grain ratio 3.18)
Aggregate B: Incinerated ash molten slag (maximum particle size 5mm or less, coarse particle ratio 3.58)
Aggregate C: Steelmaking slag (maximum grain size 5mm or less, coarse grain ratio 3.07)
(3) Admixture A: Coal ash (Blaine specific surface area 4520cm 2 / g)
Admixture B: Blast furnace slag powder (Brain specific surface area 4470cm 2 / g)
(4) Water A; Tap water B: Sludge recovered water
The method for producing eco-cement is shown below.
Ingredient adjustment by mixing 32.0% by mass of dry municipal waste incineration ash shown in Table 1, 64.2% by mass of limestone powder, 2.4% by mass of iron raw material, and 1.4% by mass of soda ash (containing 99.6% by mass of sodium carbonate: manufactured by Central Glass Co., Ltd.) The raw material was fired at 1300-1450 ° C. using a rotary kiln. The obtained fired product was pulverized by a vertical mill, and then hemihydrate gypsum was added and mixed with 2.1 parts by mass in terms of SO 3 with respect to 100 parts by mass of the pulverized product of the fired product to produce an ecocement. The brain specific surface area of Ecocement was 3900 cm 2 / g. Table 2 shows the mineral composition of ecocement.
[0020]
[Table 1]
[Table 2]
The above materials are kneaded in the proportions shown in Table 3, pressed into a 30 x 30 x 6 cm formwork, and then immediately removed, and held for 2 hours at a preheating rate of 20 ° C / hr and a maximum temperature of 65 ° C for 3 hours. Steam curing was performed under the conditions of After steam curing, it was cooled to room temperature and cured in air at 20 ° C until the age of 14 days.
The bending strength was measured for these concretes.
The results are shown in Table 3. Table 3 also shows the ratio (mass%) of the waste-origin material in all the constituent materials.
[0023]
[Table 3]
From Table 3, it can be seen that the instantly decremented concrete product of the present invention has good strength development despite using a large amount (70% by mass or more) of waste-origin materials.
[0025]
【The invention's effect】
As described above, in the instant de-concrete product of the present invention, the waste-origin material can be used in a large amount (70% by mass or more of the constituent material). In particular, it is possible to use waste-derived materials in more than 90% by mass of the constituent materials by using eco-cement using one or more of municipal waste incineration ash and sewage sludge incineration ash as raw materials. Contributes greatly to the effective use of
Claims (2)
骨材として、都市ゴミ、都市ゴミ焼却灰、下水汚泥焼却灰の一種以上を溶融して製造した溶融スラグ、あるいは高炉スラグ、製鋼スラグ、銅スラグ、碍子屑から選ばれる一種以上を用いた即脱コンクリート製品であって、
前記焼成物が、 3CaO ・ Al 2 O 3 を 10 〜 25 質量％、 4CaO ・ Al 2 O 3 ・ Fe 2 O 3 を 10 〜 20 質量％含み、 3CaO ・ Al 2 O 3 と 4CaO ・ Al 2 O 3 ・ Fe 2 O 3 の合計量が 20 〜 35 質量％で、塩素量が 0.1 質量％以下であり、さらに、 2CaO ・ SiO 2 及び／又は 3CaO ・ SiO 2 を含むものであり、
前記骨材の最大粒径が10mm以下であり、かつ、水／セメント比が25〜45質量％、単位水量が100〜180kg/m3、単位セメント量が300〜600kg/m3、ペースト／骨材比が45〜65容積％であることを特徴とする即脱コンクリート製品。As cement, use cement made of pulverized product and gypsum of burned material manufactured from one or more of municipal waste incineration ash and sewage sludge incineration ash,
Immediate removal using molten slag produced by melting at least one of municipal waste, municipal waste incineration ash, and sewage sludge incineration ash, or one or more types selected from blast furnace slag, steelmaking slag, copper slag, and eggplant scrap. A concrete product,
The baked product, a 3CaO · Al 2 O 3 10 ~ 25 wt%, include 4CaO · Al 2 O 3 · Fe 2 O 3 10 ~ 20 wt%, 3CaO · Al 2 O 3 and 4CaO · Al 2 O 3 - the total amount of Fe 2 O 3 is 20 to 35 mass%, chlorine content is not more than 0.1 mass%, further, is intended to include a 2CaO · SiO 2 and / or 3CaO · SiO 2,
The aggregate has a maximum particle size of 10 mm or less, a water / cement ratio of 25 to 45 mass%, a unit water amount of 100 to 180 kg / m 3 , a unit cement amount of 300 to 600 kg / m 3 , a paste / bone Immediate removal concrete product characterized by a material ratio of 45-65% by volume.
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