JPH06321602A - Production of low water-absorbing inorganic building material - Google Patents
Production of low water-absorbing inorganic building materialInfo
- Publication number
- JPH06321602A JPH06321602A JP13143693A JP13143693A JPH06321602A JP H06321602 A JPH06321602 A JP H06321602A JP 13143693 A JP13143693 A JP 13143693A JP 13143693 A JP13143693 A JP 13143693A JP H06321602 A JPH06321602 A JP H06321602A
- Authority
- JP
- Japan
- Prior art keywords
- water
- building material
- inorganic building
- weight
- repellent
- 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
-
- 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]
【産業上の利用分野】この発明は低吸水性の無機質建材
の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an inorganic building material having low water absorption.
【０００２】[0002]
【従来の技術】従来、繊維補強セメントなどからなる窯
業系建材が外装壁板等として非常に広く使用されてい
る。この種建材は同一形状のものが安価に大量生産可能
で、木材などの天然資源を殆ど消費しないので自然保護
の観点からも好ましいといった利点を有する。ところ
で、これら窯業系建材、特に壁板については運搬の容易
性、釘打性、鋸引性などの加工性の良いことが重要とさ
れ、このため製品が低比重となるような材料設計、製造
条件とされて製造されている。しかしながら、このよう
な材質とした場合、製品は吸水し易くなり雨水、結露
水、融雪水の吸収により材の伸縮や反りを生じ、さらに
は冬季厳寒期には凍害を引き起こしたりする問題が生ず
る。そこで、このような低比重化した製品の吸水率を低
下させるためステアリン酸カルシウムなどの高級脂肪酸
塩系や高級脂肪酸エステル、シリコーン系の撥水剤を配
合原料に添加し製品その物に撥水機能を持たせることが
良く行われる。2. Description of the Related Art Conventionally, ceramic building materials such as fiber reinforced cement have been very widely used as exterior wall boards. This kind of building material has the advantage that it can be mass-produced inexpensively in the same shape and consumes little natural resources such as wood, and is therefore preferable from the viewpoint of nature protection. By the way, it is important that these ceramic building materials, especially wallboards, have good workability such as ease of transportation, nailability, and sawability. Therefore, material design and manufacturing that results in low specific gravity It is manufactured under the conditions. However, when such a material is used, the product easily absorbs water, causing expansion and contraction and warpage of the material due to absorption of rainwater, dew condensation water, and snowmelt water, and further causes frost damage in the severe winter season. Therefore, in order to reduce the water absorption rate of such low specific gravity products, a higher fatty acid salt-based or higher fatty acid ester such as calcium stearate or a silicone-based water repellent is added to the compounding raw material to impart a water repellent function to the product itself. It is often done.
【０００３】[0003]
【従来技術の問題点】しかし、上記撥水剤の添加により
十分な撥水効果を発揮させるにはかなり多くの量を添加
する必要があり、撥水剤が高価であることより製品を安
価に提供できるのが困難となる問題があった。さらに、
撥水剤の添加量を多くすれば撥水効果の点では好都合で
あるものの、それに反比例して製品強度が低下する問題
もあり、製品によってはこのような撥水剤の強度的な面
からの使用に限界がある場合もある欠点があった。[Problems of the prior art] However, in order to exert a sufficient water-repellent effect by adding the above-mentioned water repellent, it is necessary to add a considerably large amount. There was a problem that it was difficult to provide. further,
Although increasing the amount of the water repellent is advantageous in terms of the water repellent effect, there is also a problem that the product strength decreases in inverse proportion to that. Depending on the product, the strength of the water repellent may increase. There were drawbacks that could limit its use.
【０００４】[0004]
【発明が解決しようとする課題】この発明は上記問題点
に鑑み、強度低下を伴わずに無機質建材の撥水効果を高
め、しかも安価に実施できる低吸水性の無機質建材の製
造方法を得ることを目的としてなされたものである。In view of the above problems, the present invention provides a method for producing a low water-absorbing inorganic building material which enhances the water-repellent effect of the inorganic building material without lowering the strength and can be carried out at low cost. It was made for the purpose.
【０００５】[0005]
【課題を解決するための手段】即ち、この発明の低吸水
性の無機質建材の製造方法は、セメントと珪砂、フライ
アッシュ、珪藻土等の珪酸質原料と軽量骨材と補強繊維
と必要に応じスラグ、消石灰、石膏等などの増量材など
からなる窯業系配合原料に対し 0.1〜4.0 重量％の撥水
剤と、 0.2〜2.0 重量％の粒径 2mm以下の熱可塑性プラ
スチック粒子とを添加して混合し製品形状に賦形後、オ
ートクレーブ養生することを特徴とするものである。Means for Solving the Problems That is, a method for producing a low water-absorbing inorganic building material of the present invention is to provide a cement and a siliceous raw material such as silica sand, fly ash, diatomaceous earth, a lightweight aggregate, a reinforcing fiber and optionally a slag. 0.1 to 4.0% by weight of water-repellent agent and 0.2 to 2.0% by weight of thermoplastic resin particles with a particle diameter of 2 mm or less are added to and mixed with ceramic-based compounding raw materials such as slaked lime and gypsum. It is characterized by autoclaving after shaping into a product shape.
【０００６】[0006]
【作用】この発明における窯業系配合原料の各配合量は
従来実施されているものと同様であり、この配合の点で
は特に記する点はない。本願発明において、上記配合材
料100 重量％に対し、外割で 0.1〜4.0 重量％望ましく
は0.25〜2 ％の撥水剤と、0.2 〜2.0 重量％の粒径 2mm
以下の熱可塑性プラスチック粒子とを添加して混合し常
法により製品を賦形しオートクレーブ養生を行う。In the present invention, the respective amounts of the ceramic-based compounding raw materials are the same as those conventionally used, and there is no particular point in this compounding point. In the present invention, a water repellent of 0.1 to 4.0% by weight, preferably 0.25 to 2% by weight, and a particle diameter of 2 mm of 0.2 to 2.0% by weight, based on 100% by weight of the above-mentioned compounded material, are used.
The following thermoplastic particles are added and mixed, the product is shaped by a conventional method, and autoclave curing is performed.
【０００７】上記において撥水剤は製品の撥水性を付与
するために添加されるが、その添加量は窯業系配合原料
100重量％に対し 0.1〜4.0 重量％と少ない量とされ
る。この理由は、後述する熱可塑性プラスチック粒子の
撥水効果との相乗効果によるものであるが、0.1 重量％
より少ないと後述の熱可塑性プラスチック粒子添加にも
係わらず十分な撥水効果を発揮させることができず、ま
た 4.0重量％より多くすると撥水効果の点では好都合で
あるが、この添加量付近を境として添加量増加に伴い製
品強度が低下するためである。なお、撥水剤の種類とし
ては、ステアリン酸カルシウムなどの高級脂肪酸塩系や
高級脂肪酸エステル、シリコーン系の撥水剤が使用され
る。[0007] In the above, the water repellent is added to impart water repellency to the product.
The amount is as small as 0.1 to 4.0% by weight with respect to 100% by weight. The reason for this is due to the synergistic effect with the water-repellent effect of the thermoplastic particles described later, but 0.1% by weight
If the amount is less, the sufficient water-repellent effect cannot be exhibited despite the addition of the thermoplastic particles described below, and if it is more than 4.0% by weight, it is convenient in terms of the water-repellent effect. This is because the product strength decreases as the amount added increases. As the type of the water repellent, higher fatty acid salt-based such as calcium stearate, higher fatty acid ester, or silicone-based water repellent is used.
【０００８】熱可塑性プラスチック粒子は、撥水剤と共
同して撥水作用を行うものであり、撥水剤の少ない添加
量による撥水作用を補い、安価な材料により十分な撥水
性を付与する作用を行う。この添加量を 0.2〜2.0 重量
％とするのは、 0.2重量％より少ないと前述の撥水剤添
加量をもってしても十分な撥水作用が期待できず、また
2.0重量％より多くすると製品マトリックス内の空隙率
が大きくなり過ぎ製品強度が低下する。The thermoplastic particles have a water-repellent action in cooperation with a water-repellent agent, supplement the water-repellent action due to a small amount of the water-repellent agent added, and impart sufficient water repellency to an inexpensive material. To act. The amount added is 0.2 to 2.0% by weight because if it is less than 0.2% by weight, a sufficient water repellency cannot be expected even with the above-mentioned amount of the water repellent added.
If it exceeds 2.0% by weight, the porosity in the product matrix becomes too large and the product strength decreases.
【０００９】またこの熱可塑性プラスチック粒子として
は、ポリスチレン、ポリビニルアルコール、ポリウレタ
ン、ポリプロピレン、ポリエチレン、アクリルなどの従
来周知のプラスチック粒子が、単独あるいは２種以上の
混合物として使用され、またその粒径を 2mm以下とする
のは、セメント等の配合物への均一混合性と製品強度に
対する悪影響を防止するためであり、 2mmより大きい粒
径とするとマトリックスの組織が粗となり十分な製品強
度がでない。As the thermoplastic particles, conventionally known plastic particles such as polystyrene, polyvinyl alcohol, polyurethane, polypropylene, polyethylene and acrylic are used alone or as a mixture of two or more kinds, and the particle size is 2 mm. The following is to prevent the adverse effect on the homogeneity of mixing with cement and the product strength and the product strength. If the particle size is larger than 2 mm, the matrix structure becomes coarse and the product strength is not sufficient.
【００１０】上記撥水剤及び熱可塑性プラスチック粒子
を添加した窯業系配合材料によって常法により建材を賦
形後、これら製品をオートクレーブにより高温養生を行
う。この時の養生熱によりプラスチック粒子の一部は分
解して消失するが基材中に溶融残存した粒子は、基材中
のポーラスな部分を埋めると共に撥水剤との相互作用に
より組織の撥水性を高める。この結果、少ない撥水剤の
添加にも係わらず十分な撥水性を製品に付与することが
できるのである。After building a building material by a conventional method using a ceramic compounding material to which the water repellent and thermoplastic particles are added, these products are subjected to high temperature curing by an autoclave. A part of the plastic particles decomposes and disappears due to the curing heat at this time, but the particles that remain molten in the base material fill the porous part in the base material and interact with the water repellent to make the tissue water repellent. Increase. As a result, sufficient water repellency can be imparted to the product despite the addition of a small amount of water repellent.
【００１１】[0011]
【実施例】次にこの発明の実施例を説明する。セメント
41重量％、フライアッシュ41重量％、バルプ繊維 5重量
％、パーライト13重量％の合計 100重量％に対し、増量
材としてスラグを外割りで20重量％添加してなる配合を
基本配合とし、この基本配合に対し表１に示す配合で撥
水剤（ステアリン酸カルシウム）と熱可塑性プラスチッ
ク粒子を添加し、加水の上混練して厚さ 1cm、幅20cm、
長さ40cmの板状試験片を賦形し、ついで12時間室温にて
自然養生後、 180℃×8hの条件でオートクレーブ養生を
行った。Embodiments of the present invention will be described below. cement
41% by weight, 41% by weight of fly ash, 5% by weight of balp fiber, 13% by weight of pearlite, a total of 100% by weight, and 20% by weight of slag as an extender is added as a basic composition. Add the water repellent (calcium stearate) and thermoplastic particles in the formulation shown in Table 1 to the basic formulation, mix with water and knead to give a thickness of 1 cm, width of 20 cm,
A plate-shaped test piece having a length of 40 cm was shaped, then naturally cured at room temperature for 12 hours, and then autoclaved at 180 ° C for 8 hours.
【００１２】[0012]
【表１】 [Table 1]
【００１３】得た試験片について曲げ強さ、絶乾比重、
及び吸水率を試験したところ表１下欄に示した結果とな
った。この結果より明らかなように、本願発明の実施例
のものは、いずれも強度的には撥水剤無添加の比較例４
あるいは撥水剤添加量の最も少ない比較例２と遜色無い
強度を有し、また最も多い比較例３と遜色のない吸水率
を発揮することが確認された。Bending strength, absolute dry specific gravity,
When the water absorption rate was tested, the results shown in the lower column of Table 1 were obtained. As is clear from this result, in all the examples of the present invention, Comparative Example 4 in which no water-repellent agent was added was used in terms of strength.
Alternatively, it was confirmed that it has a strength comparable to that of Comparative Example 2 in which the amount of the water repellent added is the smallest, and exhibits a water absorption rate comparable to that of Comparative Example 3 in which the amount of the water repellent is the largest.
【００１４】[0014]
【発明の効果】以上説明したように、この発明の方法に
よれば、製品強度を損なうことなく、ステアリン酸カル
シウムなどの高価な撥水剤の使用を抑えつつ、熱可塑性
プラスチック粒子との共同により十分な撥水効果を有す
る無機質建材を製造することができるのである。As described above, according to the method of the present invention, the use of expensive water repellents such as calcium stearate can be suppressed without impairing the product strength, and it is possible to achieve a sufficient effect in cooperation with the thermoplastic particles. Thus, it is possible to manufacture an inorganic building material having a water repellent effect.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０４Ｂ 24:04 2102−4Ｇ 24:26 Ｇ 2102−4Ｇ Ｂ 2102−4Ｇ 18:08 Ｂ 2102−4Ｇ 16:02 Ｚ 2102−4Ｇ 14:18） 2102−4Ｇ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI Technical indication C04B 24:04 2102-4G 24:26 G 2102-4G B 2102-4G 18:08 B 2102-4G 16:02 Z 2102-4G 14:18) 2102-4G
Claims (1)
土等の珪酸質原料と軽量骨材と補強繊維と必要に応じス
ラグ、消石灰、石膏等などの増量材などからなる窯業系
配合原料に対し 0.1〜4.0 重量％の撥水剤と、 0.2〜2.
0 重量％の粒径 2mm以下の熱可塑性プラスチック粒子と
を添加して混合し製品形状に賦形後、オートクレーブ養
生することを特徴とする低吸水性の無機質建材の製造方
法。1. A ceramic composition raw material comprising cement and silica sand, fly ash, diatomaceous material such as diatomaceous earth, lightweight aggregate, reinforcing fiber and, if necessary, slag, slaked lime, gypsum, etc. 4.0% by weight of water repellent, 0.2-2.
A method for producing a low water-absorbing inorganic building material, which comprises adding 0% by weight of thermoplastic particles having a particle diameter of 2 mm or less, mixing the mixture, shaping it into a product shape, and curing it in an autoclave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13143693A JP2937222B2 (en) | 1993-05-07 | 1993-05-07 | Method for producing low water-absorbing inorganic building materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13143693A JP2937222B2 (en) | 1993-05-07 | 1993-05-07 | Method for producing low water-absorbing inorganic building materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06321602A true JPH06321602A (en) | 1994-11-22 |
| JP2937222B2 JP2937222B2 (en) | 1999-08-23 |
Family
ID=15057925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13143693A Expired - Fee Related JP2937222B2 (en) | 1993-05-07 | 1993-05-07 | Method for producing low water-absorbing inorganic building materials |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2937222B2 (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020043135A (en) * | 2000-12-01 | 2002-06-08 | 윤영호 | Concrete 2th production using mainly blast furance slag and waste gypsum |
| WO2004039745A1 (en) * | 2002-10-29 | 2004-05-13 | Loerke, Peter | Method of manufacturing cementitious materials |
| JP2006069808A (en) * | 2004-08-31 | 2006-03-16 | Nichiha Corp | Inorganic board and its manufacturing method |
| US7722964B2 (en) | 2006-04-25 | 2010-05-25 | Nichiha Corporation | Fiber reinforced cement board and manufacturing process |
| US7758694B2 (en) | 2006-05-11 | 2010-07-20 | Nichiha Corporation | Fiber reinforced cement composition and products and manufacturing process |
| US7828892B2 (en) | 2004-08-31 | 2010-11-09 | Nichiha Corporation | Inorganic board and a method for the manufacturing thereof |
| US7837788B2 (en) | 2006-09-27 | 2010-11-23 | Nichiha Corporation | Fiber reinforced cement composition and products and manufacturing process |
| US7879145B2 (en) | 2007-02-14 | 2011-02-01 | Nichiha Corporation | Inorganic composition and products and manufacturing process |
| US7905956B2 (en) | 2006-02-15 | 2011-03-15 | Nichiha Corporation | Fiber reinforced cement composition and products and manufacturing process |
| US7967907B2 (en) | 2007-01-26 | 2011-06-28 | Nichiha Corporation | Fiber reinforced cement composition and products and manufacturing process |
| US7972433B2 (en) | 2006-12-27 | 2011-07-05 | Nichiha Co., Ltd. | Fiber reinforced cement composition and products and manufacturing process |
| US7976626B2 (en) | 2006-09-27 | 2011-07-12 | Nichiha Corporation | Fiber reinforced cement composition and products and manufacturing process |
-
1993
- 1993-05-07 JP JP13143693A patent/JP2937222B2/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020043135A (en) * | 2000-12-01 | 2002-06-08 | 윤영호 | Concrete 2th production using mainly blast furance slag and waste gypsum |
| WO2004039745A1 (en) * | 2002-10-29 | 2004-05-13 | Loerke, Peter | Method of manufacturing cementitious materials |
| JP4648668B2 (en) * | 2004-08-31 | 2011-03-09 | ニチハ株式会社 | Inorganic board and method for producing the same |
| JP2006069808A (en) * | 2004-08-31 | 2006-03-16 | Nichiha Corp | Inorganic board and its manufacturing method |
| US7828892B2 (en) | 2004-08-31 | 2010-11-09 | Nichiha Corporation | Inorganic board and a method for the manufacturing thereof |
| US7905956B2 (en) | 2006-02-15 | 2011-03-15 | Nichiha Corporation | Fiber reinforced cement composition and products and manufacturing process |
| US7722964B2 (en) | 2006-04-25 | 2010-05-25 | Nichiha Corporation | Fiber reinforced cement board and manufacturing process |
| US7758694B2 (en) | 2006-05-11 | 2010-07-20 | Nichiha Corporation | Fiber reinforced cement composition and products and manufacturing process |
| US7837788B2 (en) | 2006-09-27 | 2010-11-23 | Nichiha Corporation | Fiber reinforced cement composition and products and manufacturing process |
| US7976626B2 (en) | 2006-09-27 | 2011-07-12 | Nichiha Corporation | Fiber reinforced cement composition and products and manufacturing process |
| US7972433B2 (en) | 2006-12-27 | 2011-07-05 | Nichiha Co., Ltd. | Fiber reinforced cement composition and products and manufacturing process |
| US7967907B2 (en) | 2007-01-26 | 2011-06-28 | Nichiha Corporation | Fiber reinforced cement composition and products and manufacturing process |
| US7879145B2 (en) | 2007-02-14 | 2011-02-01 | Nichiha Corporation | Inorganic composition and products and manufacturing process |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2937222B2 (en) | 1999-08-23 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |