JPH03271169A - Fire-resistant mortar composition - Google Patents
Fire-resistant mortar compositionInfo
- Publication number
- JPH03271169A JPH03271169A JP2068934A JP6893490A JPH03271169A JP H03271169 A JPH03271169 A JP H03271169A JP 2068934 A JP2068934 A JP 2068934A JP 6893490 A JP6893490 A JP 6893490A JP H03271169 A JPH03271169 A JP H03271169A
- Authority
- JP
- Japan
- Prior art keywords
- mortar
- composition
- ions
- material powder
- aluminum sulfate
- 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
- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 44
- 239000000203 mixture Substances 0.000 title claims abstract description 27
- 230000009970 fire resistant effect Effects 0.000 title claims 2
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000000843 powder Substances 0.000 claims abstract description 14
- 239000011819 refractory material Substances 0.000 claims abstract description 14
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims abstract description 13
- 229920000609 methyl cellulose Polymers 0.000 claims abstract description 6
- 239000001923 methylcellulose Substances 0.000 claims abstract description 6
- 239000002734 clay mineral Substances 0.000 claims description 7
- 235000010981 methylcellulose Nutrition 0.000 claims description 4
- 239000000463 material Substances 0.000 claims 1
- 230000015271 coagulation Effects 0.000 abstract description 8
- 238000005345 coagulation Methods 0.000 abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 229910001424 calcium ion Inorganic materials 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 229910001425 magnesium ion Inorganic materials 0.000 abstract description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract description 3
- 238000007711 solidification Methods 0.000 abstract description 2
- 230000008023 solidification Effects 0.000 abstract description 2
- LNAZSHAWQACDHT-XIYTZBAFSA-N (2r,3r,4s,5r,6s)-4,5-dimethoxy-2-(methoxymethyl)-3-[(2s,3r,4s,5r,6r)-3,4,5-trimethoxy-6-(methoxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6r)-4,5,6-trimethoxy-2-(methoxymethyl)oxan-3-yl]oxyoxane Chemical compound CO[C@@H]1[C@@H](OC)[C@H](OC)[C@@H](COC)O[C@H]1O[C@H]1[C@H](OC)[C@@H](OC)[C@H](O[C@H]2[C@@H]([C@@H](OC)[C@H](OC)O[C@@H]2COC)OC)O[C@@H]1COC LNAZSHAWQACDHT-XIYTZBAFSA-N 0.000 abstract 1
- 238000013329 compounding Methods 0.000 abstract 1
- 230000003111 delayed effect Effects 0.000 abstract 1
- 239000003566 sealing material Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000004927 clay Substances 0.000 description 4
- 239000000701 coagulant Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000011449 brick Substances 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011452 unfired brick Substances 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000008247 solid mixture Substances 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Ceramic Products (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、耐火モルタル組成物に関し、さらに詳しくは
マグネシア−カーボン系などの吸水性の極めて低いレジ
ンボンド不焼成れんが用の目地剤として使用する耐火モ
ルタル組成物に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a refractory mortar composition, and more particularly to a refractory mortar used as a joint filler for resin-bonded unfired bricks such as magnesia-carbon type resin-bonded bricks with extremely low water absorption. Regarding the composition.
従来からマグネシア−カーボン系などの低吸水性乃至非
吸水性のレジンボンド不焼成れんがの目地剤としてのモ
ルタルには、モルタルに自硬性を付与してその流動性を
低下させるために、硫酸アルミニウムなどの凝固剤が配
合されている。この場合、モルタルの自硬時間は、主に
温度により定まるので、夏季には、モルタルの可使時間
が短くなって、作業に支障を来すことがある。Conventionally, mortar used as a joint agent for resin-bonded unfired bricks with low water absorption or non-water absorption properties such as magnesia-carbon type has been mixed with aluminum sulfate, etc. in order to impart self-hardening properties to the mortar and reduce its fluidity. Contains a coagulant. In this case, since the self-hardening time of the mortar is determined mainly by the temperature, the pot life of the mortar is shortened in the summer, which may hinder work.
したがって、非吸水性のレジンボンド不焼成れんがをモ
ルタルにより接着し、作業終了後の適当な時間内にセッ
トさせるためには、モルタル中に硫酸アルミニウムの凝
固作用を遅延させる成分をさらに配合する方法、或いは
れんが中のＭｇイオン、Ｃａイオンなどとモルタルとの
反応による凝固作用を利用して凝固を遅延させる方法、
或いはれんが表面に塗布した凝固剤とモルタルとの反応
により凝固時間を延長させる方法などが試みられている
。しかしながら、いずれの方法によっても、満足すべき
結果は得られていない。Therefore, in order to bond non-water-absorbent resin-bonded unfired bricks with mortar and set them within an appropriate time after the work is completed, there is a method of further adding a component to the mortar that retards the coagulation action of aluminum sulfate; Alternatively, a method of delaying coagulation by utilizing the coagulation effect caused by the reaction between Mg ions, Ca ions, etc. in bricks and mortar;
Alternatively, attempts have been made to extend the coagulation time by reacting a coagulant applied to the surface of the brick with mortar. However, neither method has yielded satisfactory results.
問題点を解決するための手段
本発明者は、上記の如き技術の現状に鑑みて鋭意研究を
進めた結果、特定量のクエン酸を配合する場合には、モ
ルタル中の硫酸アルミニウムの凝固作用を適度に遅延さ
せることを見出した。Means for Solving the Problems As a result of intensive research in view of the current state of the technology as described above, the inventor of the present invention has determined that when a specific amount of citric acid is mixed, the coagulation effect of aluminum sulfate in the mortar will be reduced. It was found that the delay was moderate.
すなわち、本発明は、下記の耐火モルタル組成物を提供
するものである：
■組成物重量を基準として、耐火材料粉末の少なくとも
一種８０〜９８％、メチルセルロース０．０５〜２％、
硫酸アルミニウム１〜５％およびクエン酸０．１〜１％
からなる耐火モルタル組成物。That is, the present invention provides the following refractory mortar composition: (1) 80 to 98% of at least one kind of refractory material powder, 0.05 to 2% of methyl cellulose, based on the weight of the composition;
Aluminum sulfate 1-5% and citric acid 0.1-1%
A refractory mortar composition consisting of.
■耐火材料粉末の下限量を８０％として、耐火材料粉末
の１５％までを粘土鉱物により代替した上記■項に記載
の耐火モルタル組成物。(2) The refractory mortar composition according to (2) above, in which up to 15% of the refractory material powder is replaced by clay minerals, with a lower limit of 80% of the refractory material powder.
本発明で使用する耐火材料粉末は、公知のレジンボンン
ド耐火モルタル組成物において使用されているものと変
わりはなく、ハイアルミナ質、アルミナ質のエアーセッ
トモルタルなどの少くとも一種である。これらの耐火材
料粉末は、３５０μｍ以下の粒径を有し、常法通り粒度
調整して使用する。モルタル組成物中の使用量は、モル
タル組成物９重量を基準として（以下同様）、通常８０
〜９８％程度の範囲にあり、より好ましくは、９３〜９
７％程度である。この様な耐火材料の１５％までを（す
なわち、耐火材料の下限量を８０％として）粘土鉱物に
より代替することができる。耐火材料粉末の量が８０％
未満の場合には、粘土鉱物に由来する不純物の量が過剰
となって、耐蝕性が低下するのに対し、９８％を上回る
場合には、凝固剤の量が少なくなり過ぎて、硬化が進行
しなくなる。粘土鉱物としては、本節粘土、ベントナイ
ト、蛙目粘土、硬質粘土などが例示される。粘土鉱物の
配合により、モルタル使用時の作業性が改善される。た
だし、モルタル使用時の作業性が良好であるかぎり、不
純物の混入を招く粘土鉱物を敢えて使用する必要はない
。The refractory material powder used in the present invention is the same as that used in known resin bonded refractory mortar compositions, and is at least one type of high alumina or alumina air set mortar. These refractory material powders have a particle size of 350 μm or less, and are used after adjusting the particle size in a conventional manner. The amount used in the mortar composition is usually 80% based on the weight of the mortar composition (the same applies hereinafter).
~98%, more preferably 93~9
It is about 7%. Up to 15% of such refractory materials (ie, with a lower limit of 80% for refractory materials) can be replaced by clay minerals. The amount of refractory material powder is 80%
If it is less than 98%, the amount of impurities derived from clay minerals becomes excessive and corrosion resistance decreases, whereas if it exceeds 98%, the amount of coagulant becomes too small and hardening progresses. I won't. Examples of clay minerals include Honbushi clay, bentonite, frog's eye clay, and hard clay. The combination of clay minerals improves workability when using mortar. However, as long as the workability when using mortar is good, there is no need to use clay minerals that cause contamination with impurities.
本発明でバインダーとして使用するメチルセルロースも
、同種の公知の耐火モルタル組成物において使用されて
いるものと同様のものが使用できる。モルタル組成物中
の使用量は、通常０．０５〜２％程度の範囲にあり、よ
り好ましくは、０．１〜０．４％程度である。バインダ
ーの量が少なすぎる場合には、充分な接着強度が得られ
難いのに対し、多すぎる場合には、流動性が高くなり過
ぎて作業が困難となる。。The methylcellulose used as a binder in the present invention can be the same as that used in known refractory mortar compositions of the same type. The amount used in the mortar composition is usually in the range of about 0.05 to 2%, more preferably about 0.1 to 0.4%. If the amount of binder is too small, it is difficult to obtain sufficient adhesive strength, whereas if it is too large, the fluidity becomes too high and the work becomes difficult. .
本発明で凝固剤として使用する硫酸アルミニウムの量は
、通常１〜５％程度の範囲にあり、より好ましくは２〜
３．５％程度である。この量が１％未満の場合には、凝
固作用が充分に発揮されないのに対し、５％を超える場
合には、モルタルの可使時間の調整が困難となる。The amount of aluminum sulfate used as a coagulant in the present invention is usually in the range of about 1 to 5%, more preferably 2 to 5%.
It is about 3.5%. If this amount is less than 1%, the coagulation effect will not be sufficiently exerted, whereas if it exceeds 5%, it will be difficult to adjust the pot life of the mortar.
本発明で凝固遅延剤として使用するクエン酸の量は、モ
ルタル組成物重量の通常０．１〜１％程度の範囲にあり
、より好ましくは、０．３〜０．７％程度である。この
量が０．１％未満の場合には、モルタルの凝固遅延効果
が不十分となるのに対し、１％を上回る場合には、それ
以上の効果の改善は認められず、経済的に不利である。The amount of citric acid used as a coagulation retarder in the present invention is usually in the range of about 0.1 to 1%, more preferably about 0.3 to 0.7%, based on the weight of the mortar composition. If this amount is less than 0.1%, the solidification retarding effect of the mortar will be insufficient, whereas if it exceeds 1%, no further improvement in the effect will be observed, which is economically disadvantageous. It is.
本発明によるモルタル組成物は、公知のモルタル組成物
と同様に、各成分を均一に混合した状態で一定量ずつ袋
詰めされ、輸送および貯蔵される。The mortar composition according to the present invention, like known mortar compositions, is packaged in a predetermined amount with each component uniformly mixed, transported, and stored.
使用に際しては、固体状の組成物１００重量部に対し水
２１〜２４重量部程度を添加し、混練してモルタルとし
た後、常法にしたがって、目地剤として使用される。When used, approximately 21 to 24 parts by weight of water is added to 100 parts by weight of the solid composition, kneaded to form a mortar, and then used as a joint filler according to a conventional method.
本発明によれば、硫酸アルミニウムとクエン酸との併用
により、夏季においても可使時間が充分に長く且つ硬化
後の強度の高いモルタルが得られる。本発明においてモ
ルタルの可使時間が延長される機構は、未だ十分に解明
されている訳ではないが、−心服下の通りであると推定
される。According to the present invention, by using aluminum sulfate and citric acid in combination, a mortar that has a sufficiently long pot life even in summer and has high strength after hardening can be obtained. Although the mechanism by which the pot life of mortar is extended in the present invention has not yet been fully elucidated, it is presumed to be as follows.
すなわち、本発明組成物を使用する際には、添加した水
の存在下に、耐火材料粉末からのＭｇＯ１Ｍｇイオンお
よびＣａイオン（粘土を使用するばあいには、さらにそ
の極微粉）と硫酸アルミニウムとが発熱反応して、凝固
・固化する。この際、ＭｇイオンおよびＣａイオンとク
エン酸とが先に反応して、硫酸アルミニウムとの反応が
遅延させられ、その結果、夏季においても作業が容易と
なる程度に可使時間が充分に延長されるものと推考され
る。That is, when using the composition of the present invention, in the presence of added water, MgO1Mg ions and Ca ions from the refractory material powder (if clay is used, its ultrafine powder) and aluminum sulfate are combined. undergoes an exothermic reaction and coagulates and solidifies. At this time, Mg ions and Ca ions react with citric acid first, delaying the reaction with aluminum sulfate, and as a result, the pot life is extended sufficiently to make work easier even in summer. It is assumed that the
発明の効果
本発明組成物によれば、下記の様な顕著な効果が達成さ
れる。Effects of the Invention According to the composition of the present invention, the following remarkable effects can be achieved.
（１）高温時にも、モルタルとしての形態での可使時間
が長い。(1) Even at high temperatures, the pot life in the form of mortar is long.
（２）乾燥後の強度が極めて高いので、目地剤として極
めて有用である。(2) Since the strength after drying is extremely high, it is extremely useful as a joint filler.
実施例
以下に実施例および比較例を示し、本発明の特徴とする
ところをより一層明確にする。EXAMPLES Examples and comparative examples are shown below to further clarify the features of the present invention.
実施例１および比較例１
下記第１表に示す割合（重量％）で構成された固形成分
（７５μｍ以下＝８３重量％）１００重量部に水２２重
量部を添加し、混練して、本発明のモルタルを調製した
。Example 1 and Comparative Example 1 22 parts by weight of water was added to 100 parts by weight of a solid component (75 μm or less = 83% by weight) composed of the proportions (wt%) shown in Table 1 below, and the mixture was kneaded. mortar was prepared.
第１表には、比較例としてクエン酸を配合しない従来の
モルタルの組成をも併せて示す。Table 1 also shows the composition of a conventional mortar containing no citric acid as a comparative example.
次いで、得られたモルタルをＪＩＳ Ｒ２５０４に従
って４０ｍｍＸ ４０＋ｅｍＸ １６０ｍｍに成形した
後、１１０℃で１０時間乾燥し、ＪＩＳ Ｒ２５５３
に従ってその曲げ強度を測定した。第１表にその結果を
も併せて示す。Next, the obtained mortar was molded into a size of 40 mm x 40 + em x 160 mm according to JIS R2504, and then dried at 110°C for 10 hours to meet JIS R2553.
The bending strength was measured according to the following. Table 1 also shows the results.
第１表
成 分 実施例１ 比較例１マグネシア
９６．３９６．８硫酸アルミニウム
３．０３．０メチルセルロース ０．２
０．２クエン酸 ０．５
曲げ強度（ｋｇｆ／ｃＪ） ９３ ６２第１表
に示す結果から、本発明による耐火モルタルは、優れた
強度を備えていることが明らかである。Table 1 Ingredients Example 1 Comparative Example 1 Magnesia 96.396.8 Aluminum sulfate
3.03.0 Methylcellulose 0.2
0.2 Citric acid 0.5 Bending strength (kgf/cJ) 93 62 From the results shown in Table 1, it is clear that the refractory mortar according to the present invention has excellent strength.
試験例１
実施例１および比較例１で得た２種のモルタルをそれぞ
れ２０℃、３０℃および４０℃の温度条件下に放置して
、モルタルとしての可使時間を判定した。ｔｆお、相対
湿度は、７０％とした。Test Example 1 The two types of mortars obtained in Example 1 and Comparative Example 1 were left under temperature conditions of 20°C, 30°C, and 40°C, respectively, and the pot life as mortar was determined. tfThe relative humidity was 70%.
結果は、第１図に示す通りである。The results are shown in FIG.
第１図に示す結果から、本発明により、モルタルの可使
時間が著しく延長されていることが明らかである。From the results shown in FIG. 1, it is clear that the pot life of mortar is significantly extended by the present invention.
特に、可使時間が短すぎるために従来品が実質的に使用
不可能であった３０〜４０℃の高温条件下においても、
本発明のモルタルは、使用可能であることが明らかとな
った。In particular, even under high-temperature conditions of 30 to 40°C, where conventional products were virtually unusable due to their short pot life.
It has become clear that the mortar of the invention can be used.
第１図は、実施例１および比較例１で得た２種のモルタ
ルについての温度と可使時間との関係を示すグラフであ
る。
（以 上）FIG. 1 is a graph showing the relationship between temperature and pot life for two types of mortar obtained in Example 1 and Comparative Example 1. (that's all)
Claims (2)
とも一種８０〜９８％、メチルセルロース０．０５〜２
％、硫酸アルミニウム１〜５％およびクエン酸０．１〜
１％からなる耐火モルタル組成物。(1) Based on the weight of the composition, 80-98% of at least one kind of fire-resistant material powder, 0.05-2% of methyl cellulose
%, aluminum sulfate 1-5% and citric acid 0.1-5%
A refractory mortar composition consisting of 1%.
粉末の１５％までを粘土鉱物により代替した特許請求の
範囲第１項に記載の耐火モルタル組成物。(2) The refractory mortar composition according to claim 1, wherein up to 15% of the refractory material powder is replaced by clay mineral, with a lower limit of 80% of the refractory material powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2068934A JPH03271169A (en) | 1990-03-19 | 1990-03-19 | Fire-resistant mortar composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2068934A JPH03271169A (en) | 1990-03-19 | 1990-03-19 | Fire-resistant mortar composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03271169A true JPH03271169A (en) | 1991-12-03 |
Family
ID=13387990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2068934A Pending JPH03271169A (en) | 1990-03-19 | 1990-03-19 | Fire-resistant mortar composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03271169A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014019955A (en) * | 2012-07-20 | 2014-02-03 | Speciality Minerals (Michigan) Inc | Lance for wire feeding |
-
1990
- 1990-03-19 JP JP2068934A patent/JPH03271169A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014019955A (en) * | 2012-07-20 | 2014-02-03 | Speciality Minerals (Michigan) Inc | Lance for wire feeding |
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