JPS6320796B2 - - Google Patents
Info
- Publication number
- JPS6320796B2 JPS6320796B2 JP56100352A JP10035281A JPS6320796B2 JP S6320796 B2 JPS6320796 B2 JP S6320796B2 JP 56100352 A JP56100352 A JP 56100352A JP 10035281 A JP10035281 A JP 10035281A JP S6320796 B2 JPS6320796 B2 JP S6320796B2
- Authority
- JP
- Japan
- Prior art keywords
- inorganic
- filler
- lightweight
- cured
- lightweight inorganic
- 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
- 239000000945 filler Substances 0.000 claims description 9
- 229910001562 pearlite Inorganic materials 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000011230 binding agent Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000012783 reinforcing fiber Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000010298 pulverizing process Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000004568 cement Substances 0.000 description 8
- 239000011256 inorganic filler Substances 0.000 description 8
- 229910003475 inorganic filler Inorganic materials 0.000 description 8
- 239000000835 fiber Substances 0.000 description 7
- 238000005452 bending Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000010451 perlite Substances 0.000 description 4
- 235000019362 perlite Nutrition 0.000 description 4
- 239000011398 Portland cement Substances 0.000 description 2
- 239000011400 blast furnace cement Substances 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000011490 mineral wool Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000012779 reinforcing material Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Landscapes
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Description
この発明は、外装材のような建築材料等として
用いられる軽量無機硬化体の製法に関するもので
ある。
従来より、軽量無機硬化体として比較的低密度
の繊維セメント板が広く用いられている。しか
し、この繊維セメント板は、結合材としてのセメ
ント（ポルトランドセメント、高炉セメント等）
と補強繊維だけでは低密度のものとすることが困
難であり、また多量の補強材を添加しなければ高
強度の繊維セメント板とすることができなかつ
た。さらに、このような無機硬化体の賦形は多く
は抄造法によりなされるのであるが、その際、多
量に補強材を添加したために抄造体の嵩が低くな
り、プレス時やエンボス加工時加圧しても抄造体
に高圧がかかわらず、賦形体の強度が不足してひ
びがはいつたり、型通りのものができないことが
あるという問題もあつた。他方、軽量化のために
充填材としてパーライトが用いられている繊維セ
メント板（パーライトセメント板）があるが、パ
ーライトは独立気泡を有するため、抄造法でセメ
ント板をつくる場合に、このパーライトがセメン
ト質スラリー中で、浮き上がつてしまうという問
題があつた。特にセメント質スラリー中の固型分
濃度が低い場合には、この浮上を防止することが
至極困難であり、例えば抄き上げるときに抄造体
の表面部にパーライトが多く含まれ、内部や裏面
部には少なく抄造体全体に均一に含まれないと
か、先につくつた抄造体に多く含まれ、後からつ
くつた抄造体には少ないというような問題が生じ
ていた。
この発明は、このような事情に鑑みなされたも
ので軽量でしかも高強度であり、かつ湿潤強度が
高く、耐凍害性にすぐれ、抄造時に無機質充填材
の浮き上がることがなく、型通りのものを得るこ
とができる軽量無機硬化体の製法を提供するもの
である。
この発明にかかる軽量無機硬化体の製法は、無
機質結合材に補強繊維、充填材および水を加え、
要すればその他の添加材をも加えてできるスラリ
ーを賦形し、得られた賦形体を養生して軽量無機
硬化体を得る方法であつて、充填材として、粉砕
することによつて得られる粒度100メツシユ以下
が80％以上で独立気泡をほとんど有さず、しかも
形体が球状でないパーライトを用いることを特徴
としている。これについて以下に詳細に説明す
る。
ここで用いる無機質結合材としては、水硬性の
結合材であれば特に限定しない。例えばポルトラ
ンドセメント、高炉セメント、高炉水砕スラグな
どがあり、必要に応じて石膏、MSH（カルシウム
アルミネートモノサルフエートハイドレート、
3CaO・Al2O3・CaSO4・nH2O，ｎはおおむね
12）、ケイ酸カルシウムなどを結合材に添加して
もよい。補強繊維としては特に限定せず、例え
ば、パルプ等の天然有機繊維、ビニロン、ナイロ
ンまたはポリプロピレン等の合成有機繊維，石
綿，ガラス繊維，ロツクウール，ガラスウール，
スラグウールまたはカーボン繊維等の無機繊維等
を用いる。充填材としては、この発明の特徴であ
る次にあげるような無機質充填材を用い、必要に
応じて他の充填材も併せて添加してよい。この発
明において必須の無機質充填材とは、粒度100メ
ツシユ以下が80％以上を占め、独立気泡をほとん
ど有さず、しかも形体が球状でない粉砕により得
られるパーライトである。例えば真珠岩（パーラ
イト）を焼成発泡させて破砕したものや、その破
砕したものを篩通ししたものがあげられる。
上記のような原料に水を加え、さらに製造上の
都合や製品の物性の向上などの必要に応じてその
他の添加材をも加えて、混練し、スラリーとす
る。つぎに、このスラリーを賦形して所望の形状
のものとするのであるが、抄造法によつて通常は
板状に賦形し、そののち得られた賦形体を養生硬
化させて軽量無機硬化体とする。
この発明にかかる軽量無機硬化体の製法はこの
ように構成されるものであつて、上記のような特
別の無機質充填材を用いているため、以下に述べ
るように容易に軽量の無機硬化体を得ることがで
き、そのうえ、得られる軽量無機硬化体の性能も
以下に述べるように向上する。すなわち、無機質
充填材に独立気泡をほとんど有さないので、比較
的濃度の低いスラリーであつても浮き上がること
がなく容易に抄造できるようになつた。抄造時に
は、無機質充填材を使用しない場合とくらべ抄造
体の嵩が高くなり、型で加圧して賦形体をつくる
とき抄造体に高圧がかかるようになつた。このた
め賦形体の強度が向上して、加圧時にひび割れが
生ずることもなく、しかも型通りのものができる
ようになつた。また、無機質充填材が球状でない
ので、抄造体を型で加圧したとき、この充填材を
介在して補強繊維と結合材が密実に堅く結合す
る。そのため養生後、硬化体の乾燥強度および湿
潤強度が大幅に向上し、BSW（湿潤時の曲げ強
度）／BSD（乾燥時の曲げ強度）の保持率も上昇
した。さらに得られた軽量無機硬化体は、凍結時
温度降下により生じる硬化体内部の応力が、添加
された無機質充填材の粒度が小さいことにより分
散緩和されるので、耐凍結融解性にもすぐれたも
のとなつた。
つぎに、実施例について比較例と併せて説明す
る。全実施例および比較例１において使用された
パーライト（三井金属鉱業株式会社製）の性質は
第１表に示されている。
The present invention relates to a method for producing a lightweight inorganic cured body used as a building material such as an exterior material. Conventionally, relatively low-density fiber cement boards have been widely used as lightweight inorganic hardened bodies. However, this fiber cement board uses cement as a binding material (Portland cement, blast furnace cement, etc.)
It is difficult to obtain a low-density fiber cement board using only reinforcing fibers, and it is not possible to obtain a high-strength fiber cement board without adding a large amount of reinforcing material. Furthermore, shaping of such inorganic cured bodies is often done by papermaking, but in this case, the bulk of the papermaking body is low due to the addition of a large amount of reinforcing material, and the pressure during pressing and embossing becomes difficult. However, despite the high pressure applied to the paper-formed body, there were problems in that the strength of the molded body was insufficient, resulting in cracks and the inability to form a shape. On the other hand, there are fiber cement boards (perlite cement boards) that use perlite as a filler to reduce weight, but since perlite has closed cells, when making cement boards using the papermaking method, this perlite is used as a filler. There was a problem with the material floating in the slurry. Particularly when the solid content concentration in the cementitious slurry is low, it is extremely difficult to prevent this flotation. Problems have arisen, such as a small amount being contained in the entire paper product, or a large amount being contained in the paper product made first, and less in the paper product made later. This invention was developed in view of the above circumstances, and is lightweight, has high strength, has high wet strength, has excellent frost damage resistance, does not lift up the inorganic filler during paper making, and can be made according to the mold. The present invention provides a method for producing a lightweight inorganic cured product that can be obtained. The method for producing a lightweight inorganic cured body according to the present invention includes adding reinforcing fibers, a filler, and water to an inorganic binder.
This is a method of shaping the resulting slurry by adding other additives if necessary and curing the resulting shaped body to obtain a lightweight inorganic hardened body, which can be obtained by crushing as a filler. It is characterized by the use of pearlite, which has a particle size of 100 mesh or less for more than 80%, has almost no closed cells, and is not spherical in shape. This will be explained in detail below. The inorganic binder used here is not particularly limited as long as it is a hydraulic binder. Examples include Portland cement, blast furnace cement, and granulated blast furnace slag.
3CaO・Al 2 O 3・CaSO 4・nH 2 O, n is approximately
12), calcium silicate, etc. may be added to the binder. The reinforcing fibers are not particularly limited, and include, for example, natural organic fibers such as pulp, synthetic organic fibers such as vinylon, nylon, or polypropylene, asbestos, glass fiber, rock wool, glass wool,
Inorganic fibers such as slag wool or carbon fibers are used. As the filler, the following inorganic filler, which is a feature of the present invention, is used, and other fillers may also be added as necessary. The essential inorganic filler in this invention is pearlite obtained by pulverization, which has a particle size of 100 mesh or less, accounts for 80% or more, has almost no closed cells, and is not spherical in shape. For example, pearlite may be fired and foamed and crushed, or the crushed pearlite may be passed through a sieve. Water is added to the above-mentioned raw materials, and other additives are added as needed for manufacturing convenience or to improve the physical properties of the product, and the mixture is kneaded to form a slurry. Next, this slurry is shaped into a desired shape, usually into a plate shape using a papermaking method, and then the resulting shaped body is cured and hardened to form a lightweight inorganic material. Body. The method for producing a lightweight inorganic cured body according to the present invention is constructed as described above, and since the above-mentioned special inorganic filler is used, it is easy to produce a lightweight inorganic cured body as described below. Furthermore, the performance of the resulting lightweight inorganic cured product is improved as described below. That is, since the inorganic filler has almost no closed cells, even slurry with a relatively low concentration does not float and can be easily formed into paper. During papermaking, the bulk of the papermaking body becomes higher than when no inorganic filler is used, and high pressure is applied to the papermaking body when pressurizing with a mold to create a shaped body. As a result, the strength of the molded body has been improved, and it has become possible to form a molded body without cracking when pressurized. Further, since the inorganic filler is not spherical, when the paper product is pressurized with a mold, the reinforcing fibers and the binding material are tightly and firmly bonded through the filler. Therefore, after curing, the dry strength and wet strength of the cured product were significantly improved, and the BSW (wet bending strength)/BSD (dry bending strength) retention rate also increased. Furthermore, the resulting lightweight inorganic cured product has excellent freeze-thaw resistance because the stress inside the cured product caused by the temperature drop during freezing is dispersed and alleviated by the small particle size of the added inorganic filler. It became. Next, examples will be described together with comparative examples. The properties of pearlite (manufactured by Mitsui Kinzoku Mining Co., Ltd.) used in all Examples and Comparative Example 1 are shown in Table 1.
【表】
下記第２表で示されるような配合で原料を水と
混練してスラリーとし、抄造し、型で加圧して賦
形体とした。そして、この賦形体を養生硬化させ
て軽量無機硬化体とした。[Table] The raw materials were kneaded with water to form a slurry in the formulation shown in Table 2 below, which was then made into paper and pressurized with a mold to form a shaped body. Then, this shaped body was cured and cured to obtain a lightweight inorganic cured body.
【表】
このようにして得られた実施例および比較例の
軽量無機硬化体について、抄造時のパーライトの
浮きぐあいを調べ、また常態（乾燥時）および24
時間吸水後（湿潤時）の曲げ強度試験、凍結融解
試験を行なつた。この結果は第３表に示される通
りである。[Table] Regarding the lightweight inorganic cured bodies of Examples and Comparative Examples obtained in this way, the floating texture of pearlite during papermaking was investigated.
A bending strength test after time water absorption (when wet) and a freeze-thaw test were conducted. The results are shown in Table 3.
【表】
第３表からあきらかなように、実施例はいずれ
も得られた軽量無機硬化体が比較例で得られた軽
量無機硬化体に比べ乾燥時および湿潤時の曲げ強
度、耐凍結融解性にすぐれたものになり、
BSW／BSDの保持率も上昇している。[Table] As is clear from Table 3, the lightweight inorganic cured products obtained in all Examples have better bending strength in dry and wet conditions and freeze-thaw resistance than the lightweight inorganic cured products obtained in Comparative Examples. become excellent,
BSW/BSD retention rates are also increasing.
Claims (1)
加え、要すればその他の添加材をも加えてできる
スラリーを抄造法により賦形し、得られた賦形体
を養生して軽量無機硬化体を得る方法であつて、
充填材として、粉砕することによつて得られる粒
度100メツシユ以下が80％以上で独立気泡をほと
んど有さず、しかも形状が球状でないパーライト
を用いることを特徴とする軽量無機硬化体の製
法。 ２ パーライトの添加量が、配合原料の固形分基
準で全体の20重量％以下である特許請求の範囲第
１項記載の軽量無機硬化体の製法。[Scope of Claims] 1 A slurry made by adding reinforcing fibers, a filler, and water to an inorganic binder, and other additives if necessary, is shaped by a papermaking method, and the obtained shaped body is cured. A method for obtaining a lightweight inorganic cured product,
A method for producing a lightweight inorganic hardened material, which is characterized by using as a filler pearlite obtained by pulverization, which has a particle size of 100 mesh or less, 80% or more, has almost no closed cells, and is not spherical in shape. 2. The method for producing a lightweight inorganic cured product according to claim 1, wherein the amount of pearlite added is 20% by weight or less based on the solid content of the blended raw materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10035281A JPS582258A (en) | 1981-06-26 | 1981-06-26 | Manufacture of lightweight inorganic hardened body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10035281A JPS582258A (en) | 1981-06-26 | 1981-06-26 | Manufacture of lightweight inorganic hardened body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS582258A JPS582258A (en) | 1983-01-07 |
| JPS6320796B2 true JPS6320796B2 (en) | 1988-04-30 |
Family
ID=14271707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10035281A Granted JPS582258A (en) | 1981-06-26 | 1981-06-26 | Manufacture of lightweight inorganic hardened body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS582258A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4939615A (en) * | 1972-08-23 | 1974-04-13 | ||
| JPS516225A (en) * | 1974-07-06 | 1976-01-19 | Kubota Ltd | TAINETSUSHOGEKISEISEKI MENSEMENTOGOSEIBUTSU |
-
1981
- 1981-06-26 JP JP10035281A patent/JPS582258A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4939615A (en) * | 1972-08-23 | 1974-04-13 | ||
| JPS516225A (en) * | 1974-07-06 | 1976-01-19 | Kubota Ltd | TAINETSUSHOGEKISEISEKI MENSEMENTOGOSEIBUTSU |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS582258A (en) | 1983-01-07 |
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