JPH02157148A - Production of magnesium carbonate-based building material - Google Patents
Production of magnesium carbonate-based building materialInfo
- Publication number
- JPH02157148A JPH02157148A JP30988688A JP30988688A JPH02157148A JP H02157148 A JPH02157148 A JP H02157148A JP 30988688 A JP30988688 A JP 30988688A JP 30988688 A JP30988688 A JP 30988688A JP H02157148 A JPH02157148 A JP H02157148A
- Authority
- JP
- Japan
- Prior art keywords
- magnesium carbonate
- calcium
- water
- calcium compd
- weight
- 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.)
- Pending
Links
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 title claims abstract description 27
- 239000001095 magnesium carbonate Substances 0.000 title claims abstract description 27
- 229910000021 magnesium carbonate Inorganic materials 0.000 title claims abstract description 27
- 239000004566 building material Substances 0.000 title claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 239000000203 mixture Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229940043430 calcium compound Drugs 0.000 claims description 6
- 150000001674 calcium compounds Chemical class 0.000 claims description 6
- 239000011575 calcium Substances 0.000 abstract description 8
- 229910052791 calcium Inorganic materials 0.000 abstract description 8
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 6
- 239000004568 cement Substances 0.000 abstract description 6
- 239000002893 slag Substances 0.000 abstract description 6
- 230000007935 neutral effect Effects 0.000 abstract description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 4
- 239000010881 fly ash Substances 0.000 abstract description 4
- 238000000465 moulding Methods 0.000 abstract description 4
- 239000002002 slurry Substances 0.000 abstract description 4
- 239000011398 Portland cement Substances 0.000 abstract description 3
- 238000007664 blowing Methods 0.000 abstract description 3
- 239000001569 carbon dioxide Substances 0.000 abstract description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 3
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 abstract description 3
- 239000000347 magnesium hydroxide Substances 0.000 abstract description 3
- 229910001862 magnesium hydroxide Inorganic materials 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 10
- 230000008961 swelling Effects 0.000 description 9
- 239000000047 product Substances 0.000 description 7
- 239000000835 fiber Substances 0.000 description 6
- 239000003365 glass fiber Substances 0.000 description 6
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 5
- 239000000920 calcium hydroxide Substances 0.000 description 5
- 235000011116 calcium hydroxide Nutrition 0.000 description 5
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 5
- 239000000292 calcium oxide Substances 0.000 description 5
- 235000012255 calcium oxide Nutrition 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000012783 reinforcing fiber Substances 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 239000002557 mineral fiber Substances 0.000 description 4
- 239000011490 mineral wool Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 3
- -1 calcium aluminates Chemical class 0.000 description 3
- 239000010445 mica Substances 0.000 description 3
- 229910052618 mica group Inorganic materials 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000012209 synthetic fiber Substances 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
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
- C04B28/10—Lime cements or magnesium oxide cements
- C04B28/105—Magnesium oxide or magnesium carbonate cements
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)
- 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］
本発明は外装あるいは内装用などの炭酸マグネシウム系
建材に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a magnesium carbonate-based building material for exterior or interior use.
［従来の技術］
中性炭酸マグネシウムを温熱養生することによって、こ
れを塩基性炭酸マグネシウムに変化させて、硬化させる
ことによって、無機質の硬化体を得ることは既に知られ
た技術である（例えば特開昭５４−７８７２０ ）。し
かし、この技術では発生時に起る化学反応によって硬化
体に膨れが生じ、寸法精度の良いものは得られないとい
う課題がある。[Prior art] It is already known technology to obtain an inorganic hardened product by curing neutral magnesium carbonate under heat to change it into basic magnesium carbonate and hardening it (for example, 1978-78720). However, this technique has the problem that the cured product bulges due to the chemical reaction that occurs during generation, making it impossible to obtain a product with good dimensional accuracy.
［発明の解決しようとする課題］
本発明の目的は従来技術が有する前述の欠点を解決しよ
うとするものであり、寸法精度に優れた炭酸マグネシウ
ム系建材を得ることができる製造法の提供を目的とする
。[Problems to be Solved by the Invention] The purpose of the present invention is to solve the above-mentioned drawbacks of the prior art, and to provide a manufacturing method that can obtain magnesium carbonate-based building materials with excellent dimensional accuracy. shall be.
［課題を解決するための手段］
本発明は炭酸マグネシウムとカルシウム化合物と水とを
を含有する混合物を所定の形状に成形し、これを加熱し
て硬化する炭酸マグネシウム系建材の製造法を提供する
ものである。本発明における炭酸マグネシウムとしては
、水酸化マグネシウムスラリーに炭酸ガスを吹き込むこ
とによって、生成する中性炭酸マグネシウムを主成分と
するものが好ましいがＭｇ”イオンと００３− イオ
ンを反応させて得られる中性炭酸マグネシウムでも良い
。[Means for Solving the Problems] The present invention provides a method for producing a magnesium carbonate-based building material, which involves forming a mixture containing magnesium carbonate, a calcium compound, and water into a predetermined shape, and heating and hardening the mixture. It is something. The magnesium carbonate used in the present invention is preferably one whose main component is neutral magnesium carbonate produced by blowing carbon dioxide gas into magnesium hydroxide slurry. Magnesium carbonate may also be used.
本発明におけるカルシウム化合物は水和によりカルシウ
ムイオンを放出できるものであればよい。かかる化合物
としては消石灰、生石灰。The calcium compound used in the present invention may be any compound that can release calcium ions upon hydration. Such compounds include slaked lime and quicklime.
ポルトランドセメント、アルミナセメント、スラグ、フ
ライアッシュ更にクリンカ成分であるアリット ベリッ
ト セリットなどや各種カルシウムアルミネート カル
シウムサルファアルミネートクリンカーを用いることも
可能である。かかる化合物は単独で使用してもよく、二
種以上のものを併用してもよい。It is also possible to use portland cement, alumina cement, slag, fly ash, as well as clinker components such as aritto, beritto, ceritto, and various calcium aluminates and calcium sulfur aluminate clinkers. Such compounds may be used alone or in combination of two or more.
本発明における炭酸マグネシウムとカルシウム化合物の
重量比は前者１００重量部に対して後者０１〜３５重量
部であることが好ましい。後者が０．１重量部以下では
成形体の加熱性の膨れ現象を防止する効果が少なく、３
５重量部を越えると成形体の強度が低下し、好ましくな
い。より好ましい範囲としては、前者１００重量部に対
して後者０．５〜２０重量部である。The weight ratio of magnesium carbonate and calcium compound in the present invention is preferably 01 to 35 parts by weight to 100 parts by weight of the former. If the latter is less than 0.1 part by weight, it is less effective in preventing heat-induced blistering of the molded product;
If it exceeds 5 parts by weight, the strength of the molded product will decrease, which is not preferable. A more preferable range is 100 parts by weight of the former and 0.5 to 20 parts by weight of the latter.
また、水の量は炭酸マグネシウムとカルシウム化合物の
含量の０．３７〜１９倍の範囲で製造することが望まし
い。Further, it is preferable that the amount of water is 0.37 to 19 times the content of magnesium carbonate and calcium compound.
さらに高い強度を得るためには、補強繊維を使用するこ
とが有効である。補強繊維としては、ガラス繊維、鉱物
繊維９人工鉱物繊維ロックウール、金属繊維、有機天然
繊維、パルプ、ワラストナイト、マイカ、カーボン繊維
有機合成繊維などの１種もしくは２種以上の繊維を適宜
使用することができる。In order to obtain even higher strength, it is effective to use reinforcing fibers. As reinforcing fibers, one or more types of fibers such as glass fibers, mineral fibers, artificial mineral fibers, rock wool, metal fibers, organic natural fibers, pulp, wollastonite, mica, carbon fibers, and organic synthetic fibers are used as appropriate. can do.
この成形方法としては平プレスや押出成形法を利用する
が、必要に応じて抄造法、鋳込み法なども利用が可能で
ある。また、成形体の養生温度は３０°Ｃ−１２０℃が
好ましく、３０゛Ｃ以下では炭酸マグネシウムの硬化速
度が遅（なり、好ましくない。１２０°Ｃ以上で養生す
ると硬化体の強度が著しく低（なるため好ましくない。Flat press or extrusion molding methods are used as the molding method, but paper forming methods, casting methods, etc. can also be used if necessary. In addition, the curing temperature of the molded product is preferably 30°C to 120°C; below 30°C, the curing speed of magnesium carbonate becomes slow (which is undesirable). This is not desirable.
以下に発明の具体例を表１の実施例によって説明する。Specific examples of the invention will be explained below using examples shown in Table 1.
さらに高い強度を得るためには、補強繊維を使用するこ
とが有効である。補強繊維としては、ガラス繊維、鉱物
繊維１人工鉱物繊維ロックウール、金属繊維、有機天然
繊維、パルプ ワラストナイｌ−、マイカ カーボン繊
維有機合成繊維などの１種もしくは２種以上の繊維を適
宜使用することができる。In order to obtain even higher strength, it is effective to use reinforcing fibers. As reinforcing fibers, one or more types of fibers such as glass fibers, mineral fibers, artificial mineral fibers, rock wool, metal fibers, organic natural fibers, pulp, wollastonium l-, mica carbon fibers, and organic synthetic fibers may be used as appropriate. Can be done.
［実施例］
表１のＮｏ、 １は水酸化マグネシウムの１２％スラリ
ーに炭酸ガスを吹き込んで得られた中性炭酸マグネシウ
ムの固形分９０重量部に対してスラグ４５重量部、ガラ
ス繊維チョツプドストランド（長さ １２ ｍｍ） ４
重量部、メチルセルロース１．５重量部加え、水を４５
重量部加えて混合した。この混合物を押出圧力４０ ｋ
ｇ／ ｃｍ２で押出成形して、７ Ｘ ８０Ｘ １００
０ ｍｍの生板を得、これを８０℃で２４時間温熱養生
した。養生板の膨れ（生板の厚さの養生による増加率％
）は全くなかった。この板の乾燥曲げ強度は８０ ｋｇ
／ Ｃｍ２あり、建材として充分実用化できるものであ
った。[Example] No. 1 in Table 1 shows 45 parts by weight of slag and chopped glass fiber for 90 parts by weight of solid content of neutral magnesium carbonate obtained by blowing carbon dioxide gas into 12% slurry of magnesium hydroxide. Strand (length 12 mm) 4
parts by weight, add 1.5 parts by weight of methyl cellulose, and add 45 parts by weight of water.
Parts by weight were added and mixed. This mixture was extruded at a pressure of 40 k.
Extruded at g/cm2, 7 x 80 x 100
A 0 mm green plate was obtained and heat cured at 80° C. for 24 hours. Swelling of the curing board (% increase in thickness of raw board due to curing)
) was not present at all. The dry bending strength of this board is 80 kg
/ Cm2, and could be put to practical use as a building material.
Ｎｏ、 ２はＮｏ、 １のスラグの代りにフライアッシ
ュ、ガラス繊維の代りに、マイカを使用したものである
。Ｎｏ、 ３はスラグの代りにアルミナセメント、ガラ
ス繊維の代りにロックウールを使用したものである。両
者とも養生による膨れは生じず、強度も充分なものがで
きた。No. 2 uses fly ash instead of the slag of No. 1, and mica instead of glass fiber. No. 3 uses alumina cement instead of slag and rock wool instead of glass fiber. In both cases, no swelling occurred due to curing, and sufficient strength was obtained.
Ｎｏ、 ４はガラス繊維の代りにパルプを８重量部用い
、スラグの代りに生石灰を使った例である。Ｎｏ、 ５
はＮｏ、 ４の生石灰を消石灰に置換したもので、Ｎｏ
、 ６はＮｏ、 ４の生石灰をポルトランドセメントに
置換したものである。これらはすべて、Ｎｏ、 １と同
様に養生による膨れは生じず、曲げ強度も高い値が得ら
れた。No. 4 is an example in which 8 parts by weight of pulp was used instead of glass fiber and quicklime was used instead of slag. No, 5
No. 4 is a product in which the quicklime in No. 4 is replaced with slaked lime, and No.
, 6 is the one in which the quicklime in No. 4 was replaced with Portland cement. In all of these, like No. 1, no swelling occurred due to curing, and high values of bending strength were obtained.
Ｎｏ、 ７では、中性炭酸マグネシウムを８７重量部と
し消石灰を５重量部として、使用原料の全固形分に対し
て４倍の水を用いてこれをスラリーとし、これを型枠に
鋳込んだ後、脱水し、厚さ１０ ｍｍ 、縦、横、２６
０ Ｘ ２６０ ｍｍの生板を得た。In No. 7, 87 parts by weight of neutral magnesium carbonate and 5 parts by weight of slaked lime were used to make a slurry using 4 times as much water as the total solid content of the raw materials used, and this was cast into a mold. After that, it was dehydrated and made into 10 mm thick, 26 mm long and wide.
A green board of 0 x 260 mm was obtained.
これをＮｏ、 １と同条件で養生したが、板には膨れは
生じなかった。強度も高い値が得られた。This was cured under the same conditions as No. 1, but no blistering occurred on the board. A high value of strength was also obtained.
Ｎｏ、 ８ 、 Ｎｏ、 ９は比較例で、Ｎｏ、 ８は
Ｎｏ、 ７の添加剤である消石灰を加えなかった場合で
、養生時には１５％の膨れ（厚さの増加）を生じてしま
った例である。Ｎｏ、 ９はＮｏ、 ６の添加剤である
ボルトランドセメントを加えなかった場合で、養生時に
は］０％の膨れを生じてしまった例である。No. 8, No. 9, and No. 9 are comparative examples, and No. 8 is an example in which slaked lime, which is the additive of No. 7, was not added, and 15% swelling (increase in thickness) occurred during curing. It is. No. 9 is an example in which Boltland cement, which is the additive in No. 6, was not added, and 0% swelling occurred during curing.
Ｎｏ、１０はＮｏ、 ４の生石灰の量を減少させ０．５
重量部としたもので０．０１％の膨れを生じるが実用上
は全く問題はなく、強度も低下することはなかった。Ｎ
ｏ、 １１はＮｏ、 ３のアルミナセメントを１．０重
１部に減少したものであり、膨れは０．０１％で、全（
実用上問題はな（、強度もＮｏ、 ３と同等のものが得
られた。No. 10 reduces the amount of quicklime in No. 4 to 0.5
Although the swelling occurred by 0.01% (based on parts by weight), there was no practical problem at all, and the strength did not decrease. N
No. 11 is the alumina cement of No. 3 reduced to 1.0 weight and 1 part, the swelling is 0.01%, and the total (
There were no practical problems (and the strength was equivalent to No. 3).
Ｎｏ、１２はＮｏ、 １のスラグの量を７重量部に増加
したものであり、曲げ強度は若干低下するが膨れは生じ
なかった。In No. 12, the amount of slag in No. 1 was increased to 7 parts by weight, and although the bending strength was slightly decreased, no blistering occurred.
Ｎｏ、１３はＮｏ、 ２のフライアッシュを１５重量部
に増加したものであり、Ｎｏ、 ｌ ４はＮｏ、 ５の
消石灰を２３重量部に増加したものである。Ｎｏ、１３
． Ｎｏ、１４両者とも、やはり膨れはなく、若干曲げ
強度は低下するが、実用上は問題なく商品となり得る強
度のものが得られた。No. 13 has the fly ash of No. 2 increased to 15 parts by weight, and No. 14 has the slaked lime of No. 5 increased to 23 parts by weight. No. 13
．． In both No. 14 and No. 14, there was no swelling, and although the bending strength was slightly lowered, there was no problem in practical use, and a strength that could be used as a commercial product was obtained.
以上の結果から明らかなように本発明は炭酸マグネシウ
ムとカルシウム化合物と水とからなる特定混合物に必要
に応じて補強繊維およびセメント用各種添加剤を加え、
この混合物を押出成形あるいは脱水プレス成形（鋳込み
成形や抄造成形を含む）することによって、養生時に生
じる膨れを防止することを可能としたものである。As is clear from the above results, the present invention involves adding reinforcing fibers and various additives for cement as necessary to a specific mixture consisting of magnesium carbonate, a calcium compound, and water.
By extrusion molding or dehydration press molding (including casting molding and paper forming) this mixture, it is possible to prevent blistering that occurs during curing.
［発明の効果］
本発明によれば、特にカルシウムを含んだ化合物を添加
剤に選ぶことにより膨れのない寸法精度の高い炭酸マグ
ネシウム系建材が得られる。[Effects of the Invention] According to the present invention, a magnesium carbonate-based building material with no swelling and high dimensional accuracy can be obtained by selecting a calcium-containing compound as an additive.
Claims (1)
有する混合物を所定の形状に成形し、これを加熱して硬
化する炭酸マグネシウム系建材の製造法。(1) A method for producing a magnesium carbonate-based building material, in which a mixture containing magnesium carbonate, a calcium compound, and water is formed into a predetermined shape, and the mixture is heated and hardened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30988688A JPH02157148A (en) | 1988-12-09 | 1988-12-09 | Production of magnesium carbonate-based building material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30988688A JPH02157148A (en) | 1988-12-09 | 1988-12-09 | Production of magnesium carbonate-based building material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02157148A true JPH02157148A (en) | 1990-06-15 |
Family
ID=17998500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30988688A Pending JPH02157148A (en) | 1988-12-09 | 1988-12-09 | Production of magnesium carbonate-based building material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02157148A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992000927A1 (en) * | 1990-07-10 | 1992-01-23 | James Hardie & Coy Pty. Limited | Fire-resistant fibre cement products |
| JP2002321964A (en) * | 2001-04-26 | 2002-11-08 | Taki Chem Co Ltd | Hydraulic composition |
-
1988
- 1988-12-09 JP JP30988688A patent/JPH02157148A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992000927A1 (en) * | 1990-07-10 | 1992-01-23 | James Hardie & Coy Pty. Limited | Fire-resistant fibre cement products |
| JP2002321964A (en) * | 2001-04-26 | 2002-11-08 | Taki Chem Co Ltd | Hydraulic composition |
| JP4693016B2 (en) * | 2001-04-26 | 2011-06-01 | 多木化学株式会社 | Water curable composition |
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