JPS5920628B2 - Manufacturing method of inorganic board - Google Patents
Manufacturing method of inorganic boardInfo
- Publication number
- JPS5920628B2 JPS5920628B2 JP56179917A JP17991781A JPS5920628B2 JP S5920628 B2 JPS5920628 B2 JP S5920628B2 JP 56179917 A JP56179917 A JP 56179917A JP 17991781 A JP17991781 A JP 17991781A JP S5920628 B2 JPS5920628 B2 JP S5920628B2
- Authority
- JP
- Japan
- Prior art keywords
- fly ash
- cement
- magnesium hydroxide
- weight
- manufacturing
- 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.)
- Expired
Links
Classifications
-
- 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
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
-
- 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
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【発明の詳細な説明】
本発明(まフライアッシュを主原料として軽量で、かつ
曲げ強度の秀れた無機質板を製造する方法に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing an inorganic plate that is lightweight and has excellent bending strength using fly ash as a main raw material.
フライアッシュは微粉炭燃焼ボイラの廃ガス中に含有さ
れている灰の微粉粒子を捕集したものであり、火力発電
所で発生し、石油価格の高騰により石灰利用が余儀なく
されつつ多る現況では、フライアッシュの大量発生、低
コスト化が予想され、その有効利用が注目されている。Fly ash is a collection of fine particles of ash contained in the waste gas of pulverized coal-fired boilers.It is generated at thermal power plants, and in the current situation where soaring oil prices are forcing the use of lime. , it is expected that fly ash will be produced in large quantities and its cost will be reduced, and its effective use is attracting attention.
ところで、フライアッシュは、S+02の池Al2O3
を多量に含有し、何れについても可溶性の部分を相当量
含有するので、水の存在]で水酸化カルシウム、硫酸カ
ルシウム等と水熱反応して、ゲル状のC3H(I)(1
,0〜1.5CaO,5i02゜xH2O)や、エトリ
ンガイド(3CaO2A1203゜3CaS04,32
H20)等の不溶性カルシウム塩を生成し、無機質板材
の原料として有用であることが知られている。By the way, fly ash is S+02 pond Al2O3
Since it contains a large amount of C3H(I)(1
,0~1.5CaO,5i02゜xH2O) and Etrin guide (3CaO2A1203゜3CaS04,32
It is known that it produces insoluble calcium salts such as H20) and is useful as a raw material for inorganic board materials.
このため、フライアッシュとセメント、ヌは消石灰ある
いはセメントと消石灰との含水混和物を板状に成形し、
この成形体を高温水蒸気で養生して無機質板を得ること
が行われている。For this purpose, fly ash and cement are made by forming slaked lime or a water-containing mixture of cement and slaked lime into a plate shape.
This molded body is cured with high-temperature steam to obtain an inorganic plate.
しかしながら、フライアッシュはAl2O,を多量に含
有しており(約26%程度)、その余剰アルミナのため
に、ハイドロガーネットの生成が避けられず、このハイ
ドロガーネットが粗大結晶であるために、上記硬化体の
膨張破壊を招来し、無機質板の強度低下が余儀なくされ
るといった不利がある。However, fly ash contains a large amount of Al2O (approximately 26%), and due to the excess alumina, the formation of hydrogarnet is unavoidable, and since this hydrogarnet is coarse crystals, the above-mentioned hardening This has the disadvantage that it causes expansion and destruction of the body, and the strength of the inorganic plate is forced to decrease.
ところで、本発明者等は、フライアッシュと消石灰又は
セメント等との反応系において、水酸化マグネシウムを
一定量配合すれば、得られる硬化体の曲げ強度を著しく
増大させ得ることを知った。By the way, the present inventors have found that if a certain amount of magnesium hydroxide is added to a reaction system of fly ash and slaked lime or cement, the bending strength of the resulting hardened product can be significantly increased.
5i02とMg(OH)2とを圧力10kg/i以上の
高温高圧水蒸気により熱水反応させれば、非水溶性、高
強度の非晶質あるいは結晶質のケイ酸マグネシウム結晶
体が生成するが、上記の強度向上効果は低圧の水蒸気の
もとでも発現する。If 5i02 and Mg(OH)2 are subjected to a hydrothermal reaction using high-temperature, high-pressure steam at a pressure of 10 kg/i or higher, water-insoluble, high-strength amorphous or crystalline magnesium silicate crystals are produced. The above-mentioned strength-improving effect occurs even under low-pressure water vapor.
従って、その強度向上効果の原因は定かではないが、M
g(OH)2がハイドロガーネット生成の抑止剤として
作用しているものと推定される。Therefore, although the cause of the strength improvement effect is not clear, M
It is presumed that g(OH)2 acts as an inhibitor of hydrogarnet formation.
本発明に係る無機質板の製造方法は、上記の知見に基づ
き、フライアッシュとセメント又は消石灰との硬化反応
系において水酸化マグネシウムを一定量配合することに
より、無機質板の強度を向上させようとする方法であり
、セメント又は消石灰の少なくとも何れかとフライアッ
シュとからなる水利反応性材料に水酸化マグネシウムを
2〜20重量%、パルプ、石綿等を所定量、それぞれ添
加した組成物を水の存在下で板状に成形し、該成形体を
養生硬化させることを特徴とする方法である。Based on the above findings, the method for manufacturing an inorganic board according to the present invention attempts to improve the strength of the inorganic board by adding a certain amount of magnesium hydroxide to the hardening reaction system of fly ash and cement or slaked lime. This is a method in which a composition is prepared by adding 2 to 20% by weight of magnesium hydroxide and a predetermined amount of pulp, asbestos, etc. to a water-reactive material consisting of at least one of cement or slaked lime and fly ash in the presence of water. This method is characterized by molding into a plate shape and curing and curing the molded body.
本発明において、フライアッシュとセメント又は消石灰
との配合割合は、カルシウム塩
(C8H(I)、エトリンガイド)の生成反応から定め
られる周知の割合であり、フライアッシュ/(セメント
+消石灰)の重量配合比率で70/30〜50150で
ある。In the present invention, the blending ratio of fly ash and cement or slaked lime is a well-known ratio determined from the production reaction of calcium salt (C8H(I), Etrin guide), and the weight of fly ash/(cement + slaked lime) The blending ratio is 70/30 to 50,150.
この場合、セメント/消石灰の重量配合比率は1001
0〜25/75である。In this case, the weight mixing ratio of cement/slaked lime is 1001
It is 0 to 25/75.
水酸化マグネシウムの添加量を2〜20重量%に限定す
る理由は、2重量%以下では上記した強度向上効果を充
分に達成できず、20重量%以上では水酸化マグネシウ
ムの添加に従いかえって強度が低下するに至るからであ
る。The reason why the amount of magnesium hydroxide added is limited to 2 to 20% by weight is that if it is less than 2% by weight, the above-mentioned strength improvement effect cannot be achieved sufficiently, and if it is more than 20% by weight, the strength will decrease as magnesium hydroxide is added. This is because it will lead to this.
水酸化マグネシウムの望ましい添加量は4〜15重量%
である。The desirable amount of magnesium hydroxide added is 4 to 15% by weight.
It is.
石綿又はパルプを配合する理由は、スラリーの抄造効率
、建築板として要求される鋸引き性、釘打ち性を確保す
るためであり、その配合量は、通常、パルプと石綿の総
量で10〜20重量%である。The reason for blending asbestos or pulp is to ensure the efficiency of slurry papermaking and the sawing and nailing properties required for building boards, and the blending amount is usually 10 to 20 Weight%.
本発明における養生条件は、比較的低圧の蒸気養生で充
分であり、60℃以上の水蒸気での8時間以上の養生又
は、圧力4〜8 kg/cr?tの飽和水蒸気による約
8時間のオートフレイブ養生を使用できる。As for the curing conditions in the present invention, steam curing at a relatively low pressure is sufficient, and curing for 8 hours or more in steam at 60°C or higher or at a pressure of 4 to 8 kg/cr? An autoflave curing of about 8 hours with 500 t of saturated steam can be used.
以下、本発明を実施例につき比較例との対比のもとで説
明する。Hereinafter, the present invention will be explained with reference to Examples and comparison with Comparative Examples.
実施例1〜実施例3
表に示す通りの配合比率(重量%、以下同じ)のフライ
アッシュ、水酸化マグネシウム、消石灰、セメント、石
綿及びパルプを固形分とするスラリーから厚さlomm
の板材を成形しく成形圧カニ100ky/cI?L)、
この成形体を圧力4 kg/cyaの飽和水蒸気で8時
間、オートクレイプによって養生した。Examples 1 to 3 A slurry having a solid content of fly ash, magnesium hydroxide, slaked lime, cement, asbestos, and pulp in the blending ratio (wt%, same below) as shown in the table was prepared to a thickness of 10 mm.
To form the plate material, the molding pressure is 100ky/cI? L),
This molded body was cured by autoclaving in saturated steam at a pressure of 4 kg/cya for 8 hours.
比較例 1
表に示す通り、水酸化マグネシウム無添加の配合物をス
ラリーの固形分として使用した以外は実施例と同様とし
た。Comparative Example 1 As shown in the table, the same procedure as in Example was carried out except that a formulation without addition of magnesium hydroxide was used as the solid content of the slurry.
比較例 2
表に示す通り、水酸化マグネシウムの添加量を本発明の
範囲外である25重量%とし、配合物をスラリーの固形
分として使用した以外は実施例と同様とした。Comparative Example 2 As shown in the table, the same procedure as in Example was carried out except that the amount of magnesium hydroxide added was 25% by weight, which is outside the range of the present invention, and the blend was used as the solid content of the slurry.
上記実施例品と比較例品のそれぞれにつき曲げ強度並び
に絶乾比重を測定したところ表の通りであり、実施例品
においては、比較例品に較べて曲げ強度が一段と犬であ
り、絶乾比重も1.1〜1.2であって軽量である。The bending strength and absolute dry specific gravity of the example product and the comparative example product were measured as shown in the table. It is also 1.1 to 1.2 and is lightweight.
上記説明から明らかなように、本発明によれば、曲げ強
度に秀れ、かつ充分に軽量なフライアッシュ−水酸化カ
ルシウム−セメント−水酸化マグネシウム硬化系の無機
質建材を得ることができる。As is clear from the above description, according to the present invention, it is possible to obtain an inorganic building material of fly ash-calcium hydroxide-cement-magnesium hydroxide hardening system that has excellent bending strength and is sufficiently lightweight.
Claims (1)
ッシュとからなる水和反応性材料に水酸化マグネシウム
を2〜20重量%、パルプ、石綿等を所定量、それぞれ
添加した組成物を水の存在下で板状に成形し、該成形体
を養生硬化させることを特徴とする無機質板の製造方法
。1 A composition prepared by adding 2 to 20% by weight of magnesium hydroxide and a predetermined amount of pulp, asbestos, etc. to a hydration-reactive material consisting of at least fallen cement or slaked lime and fly ash is shaped into a plate in the presence of water. 1. A method for manufacturing an inorganic board, which comprises molding the molded body into a shape, and curing and hardening the molded body.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56179917A JPS5920628B2 (en) | 1981-11-09 | 1981-11-09 | Manufacturing method of inorganic board |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56179917A JPS5920628B2 (en) | 1981-11-09 | 1981-11-09 | Manufacturing method of inorganic board |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5884152A JPS5884152A (en) | 1983-05-20 |
JPS5920628B2 true JPS5920628B2 (en) | 1984-05-14 |
Family
ID=16074171
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56179917A Expired JPS5920628B2 (en) | 1981-11-09 | 1981-11-09 | Manufacturing method of inorganic board |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5920628B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0460347B2 (en) * | 1984-02-20 | 1992-09-25 | Shinetsu Handotai Kk | |
JPH0513052U (en) * | 1991-07-29 | 1993-02-19 | 山形日本電気株式会社 | Semiconductor wafer storage case |
JPH0729842U (en) * | 1993-11-10 | 1995-06-02 | 信越ポリマー株式会社 | Wafer storage container |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01242453A (en) * | 1988-03-23 | 1989-09-27 | Kubota Ltd | Production of cement board reinforced with inorganic fiber blended with pulp |
-
1981
- 1981-11-09 JP JP56179917A patent/JPS5920628B2/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0460347B2 (en) * | 1984-02-20 | 1992-09-25 | Shinetsu Handotai Kk | |
JPH0513052U (en) * | 1991-07-29 | 1993-02-19 | 山形日本電気株式会社 | Semiconductor wafer storage case |
JPH0729842U (en) * | 1993-11-10 | 1995-06-02 | 信越ポリマー株式会社 | Wafer storage container |
Also Published As
Publication number | Publication date |
---|---|
JPS5884152A (en) | 1983-05-20 |
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