JPH0543292A - Composition for asbetos-free extrusion building material - Google Patents
Composition for asbetos-free extrusion building materialInfo
- Publication number
- JPH0543292A JPH0543292A JP19628191A JP19628191A JPH0543292A JP H0543292 A JPH0543292 A JP H0543292A JP 19628191 A JP19628191 A JP 19628191A JP 19628191 A JP19628191 A JP 19628191A JP H0543292 A JPH0543292 A JP H0543292A
- Authority
- JP
- Japan
- Prior art keywords
- composition
- starch
- building material
- curing
- asbestos
- 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.)
- Withdrawn
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
- 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
- C04B28/02—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 hydraulic cements other than calcium sulfates
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00129—Extrudable mixtures
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/10—Compositions or ingredients thereof characterised by the absence or the very low content of a specific material
- C04B2111/12—Absence of mineral fibres, e.g. asbestos
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、アスベストフリー押出
成形建材用組成物に関するものである。FIELD OF THE INVENTION The present invention relates to a composition for asbestos-free extrusion molding building materials.
【０００２】[0002]
【従来の技術】押出成形法により得られた押出成形建材
は、外壁材を中心として広く使用されており、その製造
する方法としては、セメント、スラグ等の水硬性結合
材、石綿、パルプ等の補強繊維、メチルセルロース等の
増粘剤が配合された配合物を押出機により賦形しながら
押出し、常圧あるいは高温高圧での蒸気養生により製品
を得ている（特開昭５７−７７０５８号公報、特開昭５
７−３７５５号公報）。2. Description of the Related Art Extruded building materials obtained by an extrusion method are widely used mainly for outer wall materials. As a method for producing the same, hydraulic binders such as cement and slag, asbestos and pulp are used. A mixture containing a reinforcing fiber and a thickening agent such as methyl cellulose is extruded while being shaped by an extruder, and a product is obtained by steam curing under normal pressure or high temperature and high pressure (JP-A-57-77058). JP-A-5
7-3755 gazette).
【０００３】これらの従来組成の中でも、特に石綿は押
出用モルタルの流動特性や保形性の面から必須成分であ
った。しかし、石綿繊維は資源面で枯渇し、又、人体に
有害である等の点から、石綿繊維を含有しなくとも押出
成形できる組成物の開発が望まれている。一方、セメン
トモルタル組成物の押出成形においては、成形時、ダイ
ス内にて圧力が掛かる為、増粘剤なしではモルタルから
水が分離し、ダイス内でのモルタルの流動が困難とな
り、押出成形不可となる。この為、増粘剤としてメチル
セルロース、ヒドロキシプロピルメチルセルロース等の
水溶性高分子を使用する技術が一般的となっている。こ
れはアスベストフリー押出成形においても同様で、パル
プ繊維とメチルセルロースの組み合わせ（特開昭５５−
５１７４８号公報、特開平１−２８２１４２号公報）や
カゼインナトリウムとの組み合わせ（特公平１−５３２
１６号公報）等が提案されている。Among these conventional compositions, asbestos is an essential component in view of the fluidity and shape retention of extrusion mortar. However, asbestos fibers are exhausted in terms of resources and are harmful to the human body. Therefore, it is desired to develop a composition that can be extruded without asbestos fibers. On the other hand, in extrusion molding of cement mortar composition, since pressure is applied in the die during molding, water separates from the mortar without a thickening agent, making mortar flow in the die difficult and extruding impossible. Becomes For this reason, a technique in which a water-soluble polymer such as methyl cellulose or hydroxypropyl methyl cellulose is used as a thickener has been generally used. This is the same in asbestos-free extrusion molding, and a combination of pulp fiber and methyl cellulose (JP-A-55-55).
No. 51748, Japanese Patent Application Laid-Open No. 1-282142, and combination with sodium casein (Japanese Patent Publication No. 1-532).
No. 16) has been proposed.
【０００４】[0004]
【発明が解決しようとする問題点】しかし、上記の技術
に基づき増粘剤として、従来のアスベスト組成物に用い
られていたのと同様の品種のアルキルセルロ−スやヒド
ロキシアルキルセルロースをアスベストフリー押出成形
に使用する場合には、機械停止時などによりモルタルの
リサイクルを考えた場合、夏場、温度上昇したモルタル
を数時間放置するとモルタルはその粘性を失い、リサイ
クルできないという問題点があった。However, based on the above technique, as a thickener, asbestos-free extrusion of alkylcellulose or hydroxyalkyl cellulose of the same kind as that used in the conventional asbestos composition is carried out. In the case of using it for molding, considering recycling of the mortar when the machine is stopped, etc., there is a problem that the mortar loses its viscosity and cannot be recycled if it is left for several hours in the summer when the temperature rises.
【０００５】このため、アスベストフリー組成物におい
ても、押出成形が可能であり、優れた成形性が得られ、
ポットライフの長い増粘剤が望まれていた。これを達成
する手段としては、セメント硬化遅延剤を使用する方法
とメチルセルロースの遅延タイプを使用する方法が考え
られるが、前者は遅延性のコントロ−ルは可能である
が、流動性（粘性）が十分でなく、後者は流動性は十分
であるが、目的に応じてポットライフを任意にコントロ
−ルすることが困難である。Therefore, even an asbestos-free composition can be extruded and excellent moldability can be obtained.
A thickener with a long pot life was desired. As a means for achieving this, a method of using a cement retarder and a method of using a delayed type of methylcellulose can be considered. In the former case, a delayed control is possible, but fluidity (viscosity) However, the latter has sufficient fluidity, but it is difficult to arbitrarily control the pot life according to the purpose.
【０００６】[0006]
【問題点を解決するための手段】本発明は、従来技術で
は達成されなかった問題点の解消、即ちアスベストフリ
ー組成物の押出成形において、中空状や表面模様を持つ
などの複雑な形状の製品が製造でき、かつモルタルのポ
ットライフの調節が可能な組成物を提供することを目的
とするものである。The present invention solves a problem which has not been achieved by the prior art, that is, in extrusion molding of an asbestos-free composition, a product having a complicated shape such as having a hollow shape or a surface pattern. And a composition capable of controlling the pot life of mortar.
【０００７】すなわち、本発明は、水硬性結合材、補強
繊維、結晶質の超微粉珪石、メチルセルロースおよびヒ
ドロキシプロピル化した澱粉とを含有することを特徴と
するアスベストフリー押出成形建材用組成物とすること
によりこの問題を解決し、アスベストフリ−組成物の押
出成形において、中空状や表面模様を持つなどの複雑な
形状の製品が製造でき、かつ、モルタルのポットライフ
の調節が可能な組成物を提供できることを可能とした。That is, the present invention provides a composition for an asbestos-free extrusion molding building material, which comprises a hydraulic binder, reinforcing fibers, crystalline ultrafine silica stone, methylcellulose and hydroxypropylated starch. By solving this problem, a composition capable of producing a product having a complicated shape such as having a hollow shape or a surface pattern in the extrusion molding of an asbestos-free composition and controlling the pot life of the mortar is provided. It was possible to provide.
【０００８】以下に、本発明の詳細を説明する。本発明
の水硬性結合材としては、市販の普通ポルトランドセメ
ント、アルミナセメント等が用いられる。これら水硬性
結合材は、一般的に重量平均粒径２０〜３０μｍであ
る。本発明の補強繊維としては、補強繊維ならば種類を
特定しないが、一般的に従来からセメント質材料補強用
として使用されている繊維が使用でき、石綿は使用しな
くても良い。例として、耐アルカリ性ガラス繊維、カー
ボンファイバー、ワラストナイト等の無機繊維や各種天
然繊維及び合成繊維等の有機繊維が使用できる。補強繊
維の使用量は一般的には全固形分に対して０．５〜５重
量％用いられるが、有機繊維、例えばパルプ、レーヨン
などでは耐火性能を要求される場合には４重量％以上の
添加は好ましくない。The details of the present invention will be described below. As the hydraulic binder of the present invention, commercially available ordinary Portland cement, alumina cement or the like is used. These hydraulic binders generally have a weight average particle size of 20 to 30 μm. The type of the reinforcing fiber of the present invention is not specified as long as it is a reinforcing fiber, but fibers conventionally used for reinforcing cementitious materials can be used, and asbestos may not be used. As examples, inorganic fibers such as alkali resistant glass fibers, carbon fibers, wollastonite, and organic fibers such as various natural fibers and synthetic fibers can be used. The amount of the reinforcing fiber used is generally 0.5 to 5% by weight based on the total solid content, but if the organic fiber, such as pulp or rayon, is required to have fire resistance, the amount is 4% by weight or more. Addition is not preferred.
【０００９】本発明の結晶質の超微粉珪石は、重量平均
粒径が５μｍより小さいものが好ましく、特に１μｍよ
り小さい粒子を多く含むものが、混練物の流動特性の面
から特に好ましい。重量平均粒径５μｍ以上のものは超
微粉ではなく、かつ混練物の流動特性及び押出成形後の
グリーンシートの保形性などが劣るので、好ましくな
い。また、非結晶質の超微粉珪石を用いるとポゾラン性
により水混練後３０〜６０分で凝結を開始し、ポットラ
イフが極端に短く実用には供しない。The crystalline ultrafine silica stone of the present invention preferably has a weight average particle size of less than 5 μm, and particularly preferably contains many particles of less than 1 μm from the viewpoint of the flow characteristics of the kneaded product. Particles having a weight average particle size of 5 μm or more are not ultrafine powders and are inferior in the flow characteristics of the kneaded product and the shape retention of the green sheet after extrusion molding. Further, when non-crystalline ultrafine silica stone is used, the pozzolanic property causes condensation to start in 30 to 60 minutes after water kneading, and the pot life is extremely short, which is not practical.
【００１０】結晶質の超微粉珪石の添加量は、全固形分
の５〜７０重量％が好ましく、５重量％未満では混練物
の流動特性及びグリーンシートの保形性などの超微粉の
添加効果が発現しにくく、７０重量％を越えて多量添加
すると、水硬性結合材の添加量が少なくなり、養生後の
成形体の強度が発現しにくい。また、水硬性結合材、補
強繊維、結晶質の超微粉珪石の組成物に全固形分に対し
１〜３０重量％の割合で水酸化アルミニウムやベントナ
イトなどの無機質添加剤等も添加することができる。The addition amount of the crystalline ultrafine silica stone is preferably 5 to 70% by weight of the total solid content, and if less than 5% by weight, the effect of the addition of the ultrafine powder such as the fluidity of the kneaded product and the shape retention of the green sheet. When it is added in a large amount exceeding 70% by weight, the addition amount of the hydraulic binder becomes small, and the strength of the molded body after curing is hard to develop. Further, an inorganic additive such as aluminum hydroxide or bentonite may be added to the composition of hydraulic binder, reinforcing fiber, and crystalline ultrafine silica stone in a ratio of 1 to 30% by weight based on the total solid content. ..
【００１１】本発明においては、増粘剤として、ヒドロ
キシプロピル化した澱粉とメチルセルロースとを併用す
る。ヒドロキシプロピル化した澱粉としてはポテト、コ
−ンスタ−チ、タピオカ等が原料として使用できる。成
形性の点から、分子量としては３，０００〜１０，００
０，０００が好ましく、置換度（ＭＳ）は０．１〜２．
０が好ましい。また、２．０以上はコストが高くなる。
なお、本発明でいう置換度（ＭＳ）Ｍｏｌａｒ ｓｕｂ
ｓｔｉｔｕｓｉｏｎとはセルロースのグルコ−ス環単位
当たりに付加したヒドロキシアルコキシル基のモル数で
ある。In the present invention, hydroxypropylated starch and methyl cellulose are used together as a thickening agent. As the hydroxypropylated starch, potato, cone starch, tapioca or the like can be used as a raw material. From the viewpoint of moldability, the molecular weight is 3,000 to 10,000.
50,000 is preferable, and the degree of substitution (MS) is 0.1 to 2.
0 is preferred. Further, if the value is 2.0 or more, the cost becomes high.
In addition, the substitution degree (MS) of the present invention refers to a molecular sub.
The "stition" is the number of moles of hydroxyalkoxyl groups added per glucose ring unit of cellulose.
【００１２】その使用量としては、十分なポットライフ
が得られ、かつ、予備養生後の硬化が不十分とならない
ように、全固形分に対して、澱粉０．１〜０．３重量％
とするのが好ましい。この範囲内で澱粉／メチルセルロ
ースの比率を変えることにより自由にポットライフを調
整することができる。また、成形性および予備養生後の
硬化が不十分とならないように、（澱粉＋メチルセルロ
ース）合計量は０．５〜１．５重量％とするのが好まし
い。The amount of starch used is 0.1 to 0.3% by weight of starch based on the total solid content so that sufficient pot life can be obtained and curing after pre-curing is not insufficient.
Is preferred. The pot life can be freely adjusted by changing the ratio of starch / methyl cellulose within this range. Further, the total amount of (starch + methyl cellulose) is preferably 0.5 to 1.5% by weight so that the moldability and the curing after pre-curing do not become insufficient.
【００１３】メチルセルロースとしては、粘度（２％水
溶液、２０℃）３５００〜１０００００cps 、メトキシ
ル基１９〜２６％、ヒドロキシプロポキシル基（もしく
はヒドロキシエトキシル基）４〜１５％のものが好まし
い。本発明においては、上記成分の他に界面活性剤とし
て、アニオン系、カチオン系、ノニオン系界面活性剤が
使用できるが、特に高級アルコ−ル硫酸エステルナトリ
ウム等のアニオン系やノニルフェノ−ルエチレンオキサ
イド付加物等のノニオン系が好ましく、その添加量は全
固形分に対して、０．０１〜０．３重量％が適当であ
る。０．０１重量％未満では微粉珪石、パルプ、水等の
分散が改善されず、０．３重量％以上ではセメントの水
和反応を阻害し好ましくない。The methyl cellulose preferably has a viscosity (2% aqueous solution, 20 ° C.) of 3500 to 100000 cps, a methoxyl group of 19 to 26%, and a hydroxypropoxyl group (or hydroxyethoxyl group) of 4 to 15%. In the present invention, anionic, cationic, and nonionic surfactants can be used as the surfactant in addition to the above-mentioned components. In particular, anionic or nonylphenol ethylene oxide addition such as higher alcohol sulfate sodium ester is used. It is preferable to use nonionic materials such as substances, and the addition amount thereof is appropriately 0.01 to 0.3% by weight based on the total solid content. If it is less than 0.01% by weight, the dispersion of fine powder silica, pulp, water, etc. is not improved, and if it is 0.3% by weight or more, the hydration reaction of cement is impaired, which is not preferable.
【００１４】本発明の組成物の製造方法は、粉体や繊
維、メチルセルロース、ヒドロキシプロピル化した澱粉
等の固体材料を乾式にて混合し、その後、水、界面活性
剤等、液体材料を加え、さらに混合、混練を行う。粉体
を乾式にてよく混合することにより微粉珪石、パルプ等
が分散し、界面活性剤を含む液体を後から添加すること
により水を粉体中に分散させることができる。In the method for producing the composition of the present invention, solid materials such as powders, fibers, methylcellulose, and hydroxypropylated starch are dry-mixed, and then liquid materials such as water and a surfactant are added, Further mixing and kneading are performed. Finely powdered silica stone, pulp, etc. are dispersed by thoroughly mixing the powder in a dry manner, and water can be dispersed in the powder by adding a liquid containing a surfactant later.
【００１５】成形水としては、全固形分に対して、２０
〜４０重量％添加することが好ましく、２０％未満では
製品の絶乾比重を２．０以下とするのが難しくなり、４
０％を越えると得られる製品の強度、例えば、曲げ強度
が低下する。このように配合し、混合、混練したモルタ
ルを押出成形し、必要に応じて４０〜８０℃飽和蒸気圧
下で一次養生し、成形品のハンドリング強度を得る。そ
して、これを必要に応じてオートクレーブを用いて高温
高圧養生する。この時の飽和蒸気圧温度は１１０〜２０
０℃が好ましい。The forming water is 20% of the total solid content.
-40% by weight is preferable, and if it is less than 20%, it is difficult to make the absolute dry specific gravity of the product 2.0 or less.
If it exceeds 0%, the strength of the obtained product, for example, the bending strength is lowered. The mortar thus blended, mixed and kneaded is extrusion-molded and, if necessary, primary-cured under a saturated vapor pressure of 40 to 80 ° C. to obtain the handling strength of the molded product. Then, this is subjected to high temperature and high pressure curing using an autoclave as required. The saturated vapor pressure temperature at this time is 110 to 20.
0 ° C is preferred.
【００１６】[0016]
【実施例】以下、実施例及び比較例により本発明を説明
するが、本発明はこれに限定されるものではない。EXAMPLES The present invention will be described below with reference to examples and comparative examples, but the present invention is not limited thereto.
【００１７】[0017]
【実施例１〜３および比較例１〜５】実施例及び比較例
で用いた原料、押出成形装置は下記の通りである。 原料 セメント：普通ポルトランドセメント 珪石粉 ：珪石超微粉砕品（重量平均粒径２〜３μｍ） メチルセルロース：メトローズ９０ＳＨ 界面活性剤：ノニルフェノ−ルエチレンオキサイド付加
物 パルプ：針葉樹さらしパルプ開綿品 ワラストナイト：インド産ケモリット 水酸化アルミニウム：日本軽金属社製 混合装置：日本アイリッヒ社製アイリッヒミキサ− 混練装置：ニ−ダ−ル−ダ− 押出成形装置：宮崎鉄工製「ＭＶ−ＦＭ−２００−１
型」 各原料は表１および表２に従い、セメント、超微粉珪
石、ワラストナイト、パルプ繊維、水酸化アルミニウ
ム、メチルセルロ−ス、ヒドロキシプロピル化した澱粉
等の粉体の各原料をよく攪拌・混合した後、水、界面活
性剤等の液体を加え混練した。このモルタルを４０℃Ｒ
Ｈ１００％の部屋に１時間保持しその後これを押出成形
機にて、幅６００ｍｍ厚さ６０ｍｍ（断面図：図１）長
さ３ｍのパネルを成形した。この成形体を６０℃飽和蒸
気圧下で６時間一次養生したのち、１５枚を積み重ねて
オートクレイブにて飽和蒸気圧温度１７０℃で保持時間
１時間で養生した。昇圧過程は８０℃／ｈでおこない、
降圧過程では絶対気圧１気圧まで下げた後、ドレインを
排除後、缶内からパネルを取り出した。Examples 1 to 3 and Comparative Examples 1 to 5 Raw materials and extrusion molding equipment used in Examples and Comparative Examples are as follows. Raw material Cement: Ordinary Portland cement Silica powder: Silica ultra-fine pulverized product (weight average particle size 2 to 3 μm) Methyl cellulose: Metrose 90SH Surfactant: Nonylphenol ethylene oxide adduct Pulp: Softwood exposed pulp cotton wallastonite: Indian Chemorit Aluminum Hydroxide: Nippon Light Metal Co., Ltd. Mixing device: Nihon Eyrich Co., Ltd. Eirich mixer Kneading device: Nidal-ruder Extrusion molding device: Miyazaki Tekko's "MV-FM-200-1"
Type ”Each raw material is well mixed and mixed according to Tables 1 and 2 with powders such as cement, ultrafine silica stone, wollastonite, pulp fiber, aluminum hydroxide, methylcellulose, and hydroxypropylated starch. After that, liquids such as water and a surfactant were added and kneaded. 40 ℃ R for this mortar
It was kept in a room of 100% H for 1 hour, and then this was molded into a panel having a width of 600 mm and a thickness of 60 mm (cross-sectional view: FIG. 1) with an extrusion molding machine. After primary curing of this molded body for 6 hours under a saturated vapor pressure of 60 ° C., 15 sheets were stacked and cured in an autoclave at a saturated vapor pressure temperature of 170 ° C. for a holding time of 1 hour. The pressurization process is performed at 80 ° C / h,
In the pressure reduction process, the atmospheric pressure was reduced to 1 atm, the drain was removed, and the panel was taken out from the can.
【００１８】上記施行中および施行後の成形体につい
て、表３のように、実験を行った。Experiments were carried out as shown in Table 3 for the molded articles during and after the above-mentioned treatment.
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【表２】 [Table 2]
【００２１】[0021]
【表３】 [Table 3]
【００２２】表中の押出成形性とは、図１の形状のダイ
スを用いて、モルタル練り上がり後４０℃ＲＨ１００％
の室内に１時間放置後、押出成形を行った時、所定の成
形体が得られるか否かを判定したものである。×は成形
体が得られなかったものを示している。成形時ポットラ
イフとは、モルタル練り上がり後４０℃ＲＨ１００％の
室内に放置し、その後押出成形を行うまでの、押出成形
性可能な放置時間。−は放置ありなしにかかわりなく成
形の不可能なものを示している。予備養生硬化性とは、
６０℃飽和蒸気圧下で６時間一次養生した後、両端を持
ちあげ、変形のない場合を良としたものである。絶乾比
重、素材曲げ強度は中空状の押出成形品より補強繊維の
配向方向が長手方向と同一になるように幅４０ｍｍ×長
さ５０ｍｍ×厚さ１２ｍｍの中実試料を切り出し、有効
スパン４００ｍｍ、二等分点裁荷により、素材曲げ強度
を求めたものである。絶乾比重は、この時の試験体を１
０５℃乾燥機に４８時間入れ、この後の重量と体積より
求めた。The extrudability in the table means that the die having the shape shown in FIG.
It is determined whether or not a predetermined molded product can be obtained when extrusion molding is performed after being left in the chamber for 1 hour. X indicates that a molded body could not be obtained. The pot life at the time of molding is a standing time during which extrusion moldability is possible until the mortar is kneaded and then left in a room at 40 ° C. and RH 100%, and then extrusion molded. -Indicates that molding is not possible with or without leaving. What is preliminary curing and curing?
After primary curing for 6 hours under a saturated vapor pressure of 60 ° C., both ends were lifted and the case without deformation was evaluated as good. Absolute dry specific gravity and material bending strength were cut out from hollow extruded products so that the orientation direction of the reinforcing fibers was the same as the longitudinal direction, and a solid sample of 40 mm width × 50 mm length × 12 mm thickness was cut out and an effective span of 400 mm, The bending strength of the material was determined by halving the load. The absolute dry specific gravity is 1
It was put in a dryer at 05 ° C. for 48 hours, and the weight and volume after that were determined.
【００２３】この結果、比較例１では成形体に十分なポ
ットライフが得られず、成形体に耳切れを起こした。比
較例３、４ではパネルの押出成形ができず成形体が得ら
れなかった。また、比較例２、４では押出成形は可能だ
が予備養生後硬化せず成形体が得られなかった。一方、
これに対し実施例１、２、３では十分なポットライフが
得られ、押出成形性、予備養生後のパネルの硬化とも問
題がなく良好なパネルの製造が可能であった。As a result, in Comparative Example 1, the molded product did not have a sufficient pot life, and the molded product was cut off. In Comparative Examples 3 and 4, the panel could not be extrusion-molded and a molded body could not be obtained. Further, in Comparative Examples 2 and 4, extrusion molding was possible, but a molded body could not be obtained because it was not cured after pre-curing. on the other hand,
On the other hand, in Examples 1, 2 and 3, a sufficient pot life was obtained, and there was no problem in extrusion moldability and curing of the panel after pre-curing, and it was possible to manufacture a good panel.
【００２４】[0024]
【発明の効果】本発明は、前記の構成とすることによ
り、従来技術では達成されなかった問題点の解消がで
き、即ちアスベストフリー組成物の押出成形において、
中空状や表面模様を持つなどの複雑な形状の製品が製造
でき、かつ、モルタルのポットライフの調節が可能な組
成物を提供できることを可能としたEFFECTS OF THE INVENTION The present invention, by having the above-mentioned constitution, can solve the problems that could not be achieved by the prior art, that is, in the extrusion molding of asbestos-free composition,
It is possible to manufacture a product with a complicated shape such as having a hollow shape or a surface pattern, and to provide a composition capable of controlling the pot life of mortar.
【図１】押出成形品の製品断面図[Figure 1] Product cross-section of extruded products
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 14:04 Ｚ 2102−4Ｇ 24:38） Ｚ 2102−4Ｇ Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display area C04B 14:04 Z 2102-4G 24:38) Z 2102-4G
Claims (1)
粉珪石、メチルセルロースおよびヒドロキシプロピル化
した澱粉とを含有することを特徴とするアスベストフリ
ー押出成形建材用組成物1. A composition for asbestos-free extrusion molding building material, which comprises a hydraulic binder, reinforcing fibers, crystalline ultrafine silica stone, methylcellulose and hydroxypropylated starch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19628191A JPH0543292A (en) | 1991-08-06 | 1991-08-06 | Composition for asbetos-free extrusion building material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19628191A JPH0543292A (en) | 1991-08-06 | 1991-08-06 | Composition for asbetos-free extrusion building material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0543292A true JPH0543292A (en) | 1993-02-23 |
Family
ID=16355195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19628191A Withdrawn JPH0543292A (en) | 1991-08-06 | 1991-08-06 | Composition for asbetos-free extrusion building material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0543292A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014133663A (en) * | 2013-01-08 | 2014-07-24 | Matsumoto Yushi Seiyaku Co Ltd | Admixture for cement extrusion molding and its use |
-
1991
- 1991-08-06 JP JP19628191A patent/JPH0543292A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014133663A (en) * | 2013-01-08 | 2014-07-24 | Matsumoto Yushi Seiyaku Co Ltd | Admixture for cement extrusion molding and its use |
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