JPH03228880A - Lightweight cement formed body - Google Patents
Lightweight cement formed bodyInfo
- Publication number
- JPH03228880A JPH03228880A JP2211490A JP2211490A JPH03228880A JP H03228880 A JPH03228880 A JP H03228880A JP 2211490 A JP2211490 A JP 2211490A JP 2211490 A JP2211490 A JP 2211490A JP H03228880 A JPH03228880 A JP H03228880A
- Authority
- JP
- Japan
- Prior art keywords
- calcium carbonate
- cement
- whiskery
- lightweight cement
- formed body
- 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
- 239000004568 cement Substances 0.000 title claims abstract description 22
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 22
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 9
- 239000000945 filler Substances 0.000 abstract description 8
- 239000011398 Portland cement Substances 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 239000010451 perlite Substances 0.000 abstract description 3
- 235000019362 perlite Nutrition 0.000 abstract description 3
- 239000004566 building material Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 230000005484 gravity Effects 0.000 description 8
- 238000000465 moulding Methods 0.000 description 6
- 239000003610 charcoal Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000012783 reinforcing fiber Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000012209 synthetic fiber Substances 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006253 efflorescence Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000009740 moulding (composite fabrication) Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 239000012763 reinforcing filler Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Landscapes
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、建築用内外装材として用いられる軽量セメン
ト成形体に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a lightweight cement molded body used as an interior/exterior material for construction.
［従来の技術・課題］
建築用内外装材として用いられる軽量セメント成形体は
抄造法、プレス法、押出法等種々の成形方法で製造され
ている。[Prior Art/Problems] Light-weight cement molded bodies used as interior and exterior materials for buildings are manufactured by various molding methods such as paper forming, pressing, and extrusion methods.
これらの軽量セメント成形体には嵩比重を低減させるた
めに、パーライト、シラスバルーン等の無機質発泡体ま
たはスチレンビーズ等の有機質発泡体あるいは起泡剤等
が添加されている。In order to reduce bulk specific gravity, these lightweight cement molded bodies contain inorganic foams such as perlite and shirasu balloons, organic foams such as styrene beads, or foaming agents.
しかし、これらの軽量化骨材や起泡剤を多量に用いるこ
とは成形体の機械的強度を損ねたり、表面の平滑性が失
われたりする原因となる。更に、軽量化骨材が有機買系
のものである場合には、不燃性に問題を生ずることが多
い。However, using large amounts of these lightweight aggregates and foaming agents may impair the mechanical strength of the molded product or cause loss of surface smoothness. Furthermore, when the lightweight aggregate is organically sourced, problems often arise in terms of nonflammability.
また、軽量セメント成形体を建築用内外装材として使用
する上で、水分の吸放出に伴う寸法変化率（以下、単に
寸法変化率と記載する）はビス部のクラック、板のアバ
レ等に深く拘わる重要な物性である。In addition, when using lightweight cement compacts as interior and exterior materials for buildings, the rate of dimensional change (hereinafter simply referred to as dimensional change rate) due to the absorption and release of moisture is deeply affected by cracks in screws, holes in boards, etc. This is an important physical property.
従来、寸法変化率を低減させるため、種々の無機質充填
材が添加されていたが、充填材の添加による嵩比重の増
大及び強度の低下等の弊害があった。また、嵩比重の増
大は釘打性、鋸引き性にも悪影響を及ぼす。従って、嵩
比重を低減させるため、更に大量の軽量化骨材を添加す
ると、強度低下を起こしたり、表面の平滑性が失われ、
塗装がしすらい等の欠点が発生するという悪循環が繰り
返されていた。Conventionally, various inorganic fillers have been added to reduce the rate of dimensional change, but the addition of fillers has had disadvantages such as an increase in bulk specific gravity and a decrease in strength. In addition, an increase in bulk specific gravity has a negative effect on nailing performance and sawing performance. Therefore, if a large amount of lightweight aggregate is added to reduce the bulk specific gravity, the strength will decrease and the surface smoothness will be lost.
A vicious cycle of paint fading and other defects was occurring over and over again.
本発明は前記従来の軽量化セメント成形体の問照点を一
挙に解決するものであり、その目的は成形体表面が平滑
で、高強度且つ低嵩比重、更に低寸法変化率の軽量セメ
ント成形体を提供することにある。The present invention solves all the problems of the conventional lightweight cement moldings at once, and its purpose is to create lightweight cement moldings with a smooth molded surface, high strength, low bulk specific gravity, and low dimensional change rate. It's about offering your body.
［課題を解決するための手段］
本発明のポイントは軽量セメント成形体中にホイスカー
状アラゴナイト型炭酸カルシウム（以下、ホイスカー状
炭カルと記載する）を配合することにある。[Means for Solving the Problems] The key point of the present invention is to blend whisker-like aragonite-type calcium carbonate (hereinafter referred to as whisker-like charcoal) into a lightweight cement molded body.
すなわち、本発明は軽量セメント成形体において、内側
で５〜４０重量％のホイスカー状炭カルを配合すること
を特徴とする軽量セメント成形体に係る。That is, the present invention relates to a lightweight cement molded body characterized in that 5 to 40% by weight of whisker-like carbon cal is blended inside the lightweight cement molded body.
［作 用コ
本発明はホイスカー状炭カルを５〜４０重量％含有する
軽量セメント成形体を提供するものである。また、ボイ
スカー状炭カルとその他の充填材を併用する場合、その
総量が４０重量％以下とすることが必須である。[Function] The present invention provides a lightweight cement molded body containing 5 to 40% by weight of whisker-like coal. Further, when using the voice carcoal and other fillers together, it is essential that the total amount thereof be 40% by weight or less.
本発明において使用されるセメントとしては普＝３
通ポルトランドセメントの他、早強ポルトランドセメン
ト、高炉セメント、フライアッシュセメント等が使用さ
れる。これらセメントの添加配合量は通常９５〜５０重
量％である。該添加配合量が５０重量％未満であると、
強度低下のために好ましくない。The cement used in the present invention includes ordinary Portland cement, early strength Portland cement, blast furnace cement, fly ash cement, and the like. The amount of these cements added is usually 95 to 50% by weight. When the amount added is less than 50% by weight,
Unfavorable due to reduced strength.
また、普通ポルトランドセメントの一部を必要に応じて
ポゾラン性物質に置換して配合することもできる。ポゾ
ラン性物質としてはシリカフラワー、フライアッシュ、
高炉水砕スラグ等が例示できる。Further, if necessary, a part of the ordinary Portland cement can be replaced with a pozzolanic substance. Pozzolanic substances include silica flower, fly ash,
Examples include granulated blast furnace slag.
これらの添加物は耐凍結融解性能の向上、白華の防止、
成形体作成時のスラリー特性改質等目的に応じて適宜添
加されるものであり、本発明において、その添加量は特
に規定されるものではない。These additives improve freeze-thaw resistance, prevent efflorescence,
It is added as appropriate depending on the purpose, such as improving the characteristics of the slurry when producing a molded body, and the amount added is not particularly defined in the present invention.
また、補強繊維は必要に応じて添加することができ、従
来より使用されていた石綿、木質パルプ、有機合成繊維
、無機合成繊維が例示でき、これらを複数併用してもよ
い。これら補強繊維の添加配合量は通常２〜１５重量％
の範囲内が好ましい。Furthermore, reinforcing fibers can be added as required, and examples include conventionally used asbestos, wood pulp, organic synthetic fibers, and inorganic synthetic fibers, and a plurality of these may be used in combination. The amount of these reinforcing fibers added is usually 2 to 15% by weight.
It is preferably within the range of .
該添加配合量が２重量％以下では、補強繊維の添加効果
がないために好ましくなく、また、１５重量％を超える
と混合不良に起因する成形体中の欠陥発生のために好ま
しくない。If the amount added is less than 2% by weight, it is not preferable because there is no effect of adding the reinforcing fibers, and if it exceeds 15% by weight, it is not preferable because defects may occur in the molded product due to poor mixing.
本発明に使用するホイスカー状炭カル（ホイスカー状ア
ラゴナイト型炭酸カルシウム）は例えば「石膏と石灰Ｊ
Ｎｏ、２１６（１９８８）等に記載されているもので
あり、これは長径２０μｍ程度の針状粒子のような特徴
を有するものであり、例えばタマパールーＦＣＣとして
奥多摩工業（株）社から入手できるものである。The whisker-like charcoal calcium carbonate (whisker-like aragonite type calcium carbonate) used in the present invention is, for example, “gypsum and lime J
No. 216 (1988), etc., and has the characteristics of needle-like particles with a major axis of about 20 μm, and is available from Okutama Kogyo Co., Ltd. as Tamapallu FCC, for example. be.
ホイスカー状炭カルの添加配合量は内側で５〜４０重量
％の範囲内である。該添加配合量が５重量％未満である
と、添加効果がないために好ましくなく、また、４０重
量％を超えると強度低下のために好ましくない。The amount of whisker-like carbon cal added is within the range of 5 to 40% by weight on the inside. If the amount added is less than 5% by weight, it is not preferable because there is no effect of the addition, and if it exceeds 40% by weight, it is not preferable because the strength decreases.
ホイスカー状炭カル以外に充填材を添加する場合、ホイ
スカー状炭カルとその他の充填材との総量を４０重量％
以下とする必要がある。４０重量％を超える量の充填材
を添加すると、強度低下が起こる。If a filler is added in addition to the whisker-like charcoal, the total amount of the whisker-like charcoal and other fillers should be 40% by weight.
It is necessary to do the following. Addition of filler in amounts exceeding 40% by weight results in a decrease in strength.
なお、他の充填材としては慣用の任意のものを使用する
ことができ、例えばパーライト、粉末炭酸カルシウム等
を挙げることができる。Note that any conventional filler can be used as the other filler, and examples thereof include perlite, powdered calcium carbonate, and the like.
本発明によるホイスカー状炭カルを５〜４０重量％含有
する軽量セメント成形体は従来よく知られている慣用の
任意の成形方法を全て利用することができ、プレス法、
抄造法、押出法などが例示でき、特別な処方は必要とし
ない。例えばプレス脱水法によれば、マトリックス原料
であるセメントと必要な補強繊維、充填材及びホイスカ
ー状炭カルを所定量秤量し、適当量の水に分散、混合し
、プレス脱水成形を行うことができる。The lightweight cement molded article containing 5 to 40% by weight of whisker-like coal cals according to the present invention can be produced by any conventionally well-known molding method, including press method,
Examples include a papermaking method and an extrusion method, and no special prescription is required. For example, according to the press dehydration method, a predetermined amount of cement as a matrix raw material, necessary reinforcing fibers, fillers, and whisker-like charcoal are weighed, dispersed and mixed in an appropriate amount of water, and press dehydration molding can be performed. .
［実 施 例］
実施例１〜３
表１の配合割合により原料を秤量し、固形分に対し、３
倍の水に分散した後、スラリーを型枠に流し込み、２０
ｋｇ／ ａｍ２のプレス圧力で板状に脱水成形を行っ
た後、５０℃の湿空箱内で８時間養生を行った。次いで
、１００℃の乾燥機内で恒量になるまで乾燥し、嵩比重
、曲げ強さ、寸法変化率を測定した。ここで、寸法変化
率は試料を水中に２４時間浸漬した時の長さをｌｌ１１
とし、次いでこの試料を１０５℃の乾燥機で２４時間乾
燥し、デシケータ−中で室温まで冷却した時の長さをρ
ｄとすると以下の式で示される。[Example] Examples 1 to 3 Raw materials were weighed according to the blending ratio in Table 1, and 3
After dispersing in twice the amount of water, pour the slurry into the formwork and
After dehydration molding into a plate shape with a press pressure of kg/am2, curing was performed in a humid air box at 50°C for 8 hours. Next, it was dried in a dryer at 100°C until it reached a constant weight, and its bulk specific gravity, bending strength, and dimensional change rate were measured. Here, the dimensional change rate is the length when the sample is immersed in water for 24 hours.
Then, this sample was dried in a dryer at 105℃ for 24 hours, and the length when cooled to room temperature in a desiccator was ρ.
When d, it is expressed by the following formula.
寸法変化率−［（ＩＩｌｌ−１ｄ）／１ｄ］×１００（
％）比較例１〜４
表１の配合割合にて原料を秤量し、以下実施例と同じ操
作により成形体を作成し、物性を測定した。Dimensional change rate-[(IIll-1d)/1d]×100(
%) Comparative Examples 1 to 4 Raw materials were weighed according to the blending ratios shown in Table 1, molded bodies were prepared by the same operations as in the examples, and their physical properties were measured.
その結果、比較例１〜３は実施例に比べ嵩比重が大きく
、釘打ができなかった。更に、寸法変化率が実施例に比
べ大きかった。比較例４は実施例に比べ著しく曲げ強さ
が小さかった。As a result, Comparative Examples 1 to 3 had larger bulk specific gravity than Examples, and could not be nailed. Furthermore, the dimensional change rate was greater than in the Examples. Comparative Example 4 had significantly lower bending strength than Example.
［発明の効果コ
本発明の軽量セメント成形体は表面が平滑で、高強度で
、且つ低嵩比重で、更に、低寸法変化率が小さく、建築
用内外装材として好適に使用できる。[Effects of the Invention] The lightweight cement molded article of the present invention has a smooth surface, high strength, low bulk specific gravity, and low dimensional change rate, and can be suitably used as interior and exterior materials for buildings.
Claims (1)
％のホイスカー状アラゴナイト型炭酸カルシウムを配合
することを特徴とする軽量セメント成形体。1. A lightweight cement molded product, characterized in that 5 to 40% by weight of whisker-like aragonite-type calcium carbonate is blended in the lightweight cement molded product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2211490A JP2886594B2 (en) | 1990-02-02 | 1990-02-02 | Lightweight cement molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2211490A JP2886594B2 (en) | 1990-02-02 | 1990-02-02 | Lightweight cement molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03228880A true JPH03228880A (en) | 1991-10-09 |
| JP2886594B2 JP2886594B2 (en) | 1999-04-26 |
Family
ID=12073861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2211490A Expired - Lifetime JP2886594B2 (en) | 1990-02-02 | 1990-02-02 | Lightweight cement molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2886594B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020511392A (en) * | 2017-03-23 | 2020-04-16 | ソリディア テクノロジーズ インコーポレイテッドＳｏｌｉｄｉａ Ｔｅｃｈｎｏｌｏｇｉｅｓ， Ｉｎｃ． | Production of lightweight composites from inorganic additives and carbonatable calcium silicate |
-
1990
- 1990-02-02 JP JP2211490A patent/JP2886594B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020511392A (en) * | 2017-03-23 | 2020-04-16 | ソリディア テクノロジーズ インコーポレイテッドＳｏｌｉｄｉａ Ｔｅｃｈｎｏｌｏｇｉｅｓ， Ｉｎｃ． | Production of lightweight composites from inorganic additives and carbonatable calcium silicate |
| US11767264B2 (en) | 2017-03-23 | 2023-09-26 | Solidia Technologies, Inc. | Mineral additives and production of lightweight composite materials from carbonatable calcium silicate |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2886594B2 (en) | 1999-04-26 |
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