JP2909738B2 - A method for repairing mold and mold on the surface of concrete or mortar composition - Google Patents
A method for repairing mold and mold on the surface of concrete or mortar compositionInfo
- Publication number
- JP2909738B2 JP2909738B2 JP62122555A JP12255587A JP2909738B2 JP 2909738 B2 JP2909738 B2 JP 2909738B2 JP 62122555 A JP62122555 A JP 62122555A JP 12255587 A JP12255587 A JP 12255587A JP 2909738 B2 JP2909738 B2 JP 2909738B2
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- mold
- mortar composition
- mortar
- composition
- 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 - Lifetime
Links
- 239000000203 mixture Substances 0.000 title claims description 55
- 239000004570 mortar (masonry) Substances 0.000 title claims description 53
- 238000000034 method Methods 0.000 title claims description 24
- 239000000417 fungicide Substances 0.000 claims description 22
- 230000000855 fungicidal effect Effects 0.000 claims description 21
- 239000004568 cement Substances 0.000 claims description 18
- 239000007864 aqueous solution Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 14
- 239000003513 alkali Substances 0.000 claims description 12
- -1 silicate compound Chemical class 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 239000000243 solution Substances 0.000 claims description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 5
- 229910017053 inorganic salt Inorganic materials 0.000 claims description 3
- PAZHGORSDKKUPI-UHFFFAOYSA-N lithium metasilicate Chemical compound [Li+].[Li+].[O-][Si]([O-])=O PAZHGORSDKKUPI-UHFFFAOYSA-N 0.000 claims description 2
- 229910052912 lithium silicate Inorganic materials 0.000 claims description 2
- 230000003449 preventive effect Effects 0.000 claims description 2
- 239000004815 dispersion polymer Substances 0.000 claims 4
- 239000006185 dispersion Substances 0.000 claims 2
- 229920003048 styrene butadiene rubber Polymers 0.000 claims 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M nitrite group Chemical group N(=O)[O-] IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- QBLDFAIABQKINO-UHFFFAOYSA-N barium borate Chemical compound [Ba+2].[O-]B=O.[O-]B=O QBLDFAIABQKINO-UHFFFAOYSA-N 0.000 description 5
- 229910052602 gypsum Inorganic materials 0.000 description 5
- 239000010440 gypsum Substances 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- WJCNZQLZVWNLKY-UHFFFAOYSA-N thiabendazole Chemical compound S1C=NC(C=2NC3=CC=CC=C3N=2)=C1 WJCNZQLZVWNLKY-UHFFFAOYSA-N 0.000 description 5
- 229940121375 antifungal agent Drugs 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- CFKMVGJGLGKFKI-UHFFFAOYSA-N 4-chloro-m-cresol Chemical compound CC1=CC(O)=CC=C1Cl CFKMVGJGLGKFKI-UHFFFAOYSA-N 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000003429 antifungal agent Substances 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 230000028644 hyphal growth Effects 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- CMGDVUCDZOBDNL-UHFFFAOYSA-N 4-methyl-2h-benzotriazole Chemical compound CC1=CC=CC2=NNN=C12 CMGDVUCDZOBDNL-UHFFFAOYSA-N 0.000 description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 230000012010 growth Effects 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 241000228245 Aspergillus niger Species 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 241000228153 Penicillium citrinum Species 0.000 description 1
- 239000001888 Peptone Substances 0.000 description 1
- 108010080698 Peptones Proteins 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 241000221535 Pucciniales Species 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 241000235546 Rhizopus stolonifer Species 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 230000000843 anti-fungal effect Effects 0.000 description 1
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 1
- 239000012964 benzotriazole Substances 0.000 description 1
- LLEMOWNGBBNAJR-UHFFFAOYSA-N biphenyl-2-ol Chemical group OC1=CC=CC=C1C1=CC=CC=C1 LLEMOWNGBBNAJR-UHFFFAOYSA-N 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- CGMKPKRNUNDACU-UHFFFAOYSA-N carbamimidoyl(dodecyl)azanium;chloride Chemical compound Cl.CCCCCCCCCCCCN=C(N)N CGMKPKRNUNDACU-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000645 desinfectant Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 1
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 1
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 1
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 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
- 238000000465 moulding Methods 0.000 description 1
- 150000002826 nitrites Chemical class 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 235000019319 peptone Nutrition 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- RAFRTSDUWORDLA-UHFFFAOYSA-N phenyl 3-chloropropanoate Chemical compound ClCCC(=O)OC1=CC=CC=C1 RAFRTSDUWORDLA-UHFFFAOYSA-N 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 239000011414 polymer cement Substances 0.000 description 1
- 239000011433 polymer cement mortar Substances 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Working Measures On Existing Buildindgs (AREA)
- Aftertreatments Of Artificial And Natural Stones (AREA)
- Building Environments (AREA)
Description
【発明の詳細な説明】
<産業上の利用分野>
この発明は、既に完成した建造物のコンリートまたは
モルタル組成物表面のカビを駆除し、また発生を防止
し、更に必要に応じてコンクリートまたはモルタル組成
物中の鋼材をも防錆するようにしたコンクリートまたは
モルタル組成物表面の防カビ補修工法に関するものであ
る。
<従来の技術と発明が解決しようとする問題点>
従来、本技術分野においては、防カビ石膏ボード(特
開昭61−18705号公報)が知られているが、対象物が、
石膏ボード、石膏ラスボード、吸音用孔あき石膏ボー
ド、化粧石膏ボードに限られ、また使用する防カビ剤
も、非常に限られたものであった。
しかしながら、建築用コンクリートまたはモルタル組
成物の表面は、特に湿度が高い環境においては、しばし
ば表面にカビが発生する。カビの発生は外観を損なうば
かりでなく、その内部を中性化して鉄筋を発錆させ、建
築物(建築物)に致命的な損傷を与えることが多い。
ところが、建築用コンクリートまたはモルタル組成物
の表面に発生するカビを有効に防止する手段が存在せ
ず、カビが発生した場合に、塩素系の薬剤(塩素水、次
亜鉛素酸水等)またはカセイソーダ等を使用してブラシ
等で洗浄する程度の方法しかなかった。その理由は、モ
ルタル等に代表される建築用コンクリートまたはモルタ
ル組成物の内部が強アルカリ性であるため、通常の防カ
ビ剤をモルタル等に混入したり、コンクリートまたはモ
ルタル組成物の表面に吹付け(塗布し)てもほとんど効
果がなく、また一時的に効果があっても、アルカリ性の
ため持続性に乏しかったので、折角苦労してカビを落し
てもすぐにまた元へ戻ってしまうからであった。
そこで発明者等は、強アルカリ性においても効力が低
下しない防カビ剤を選択すると共に、この防カビ剤を使
用して、これを半永久的に持続させるコンクリートまた
はモルタル組成物表面の防カビ補修工法を開発すべく鋭
意努力した結果本発明を完成した。
<問題点を解決するための手段>
本願は次の2発明により構成されている。
(1)第1発明:コンクリートまたはモルタル組成物の
表面に、耐アルカリ性防カビ剤の水溶液を塗布含浸させ
た後、更にセメント系組成物を上塗することを特徴とす
るコンクリートまたはモルタル組成物表面に防カビ補修
工法。
この第1発明は、耐アルカリ性防カビ剤の水溶液を塗
布含浸させた後、更にセメント系組成物を上塗して、防
カビ剤が流出しないようにして効力を持続させようとす
るものである。
(2)第2発明:鋼材を内蔵するコンクリートまたはモ
ルタル組成物の表面に、耐アルカリ性防カビ剤の水溶液
と、次の(A)、(B)に示す水溶液の少なくとも1種
を塗布含浸させた後、更にセメント系組成物を上塗する
ことを特徴とするコンクリートまたはモルタル組成物表
面の防カビ補修工法。
(A)前記鋼材に対して防錆効果を有する無機塩類の水
溶液。
(B)水溶性ケイ酸塩化合物の水溶液。
この第2発明は、第1発明に係る防カビ工法を行なう
際に、そのコンクリートまたはモルタル組成物が鋼材を
内蔵するコンクリートまたはモルタル組成物であるとき
は、コンクリートまたはモルタル組成物の表面に耐アル
カリ性防カビ剤の水溶液と共に、コンクリートまたはモ
ルタル組成物中の中性化を防止し、また塩害を緩和する
ための水溶性ケイ酸塩化合物の水溶液、または/及び鋼
材に対して防錆効果を有する無機塩類の水溶液を塗布含
浸し、防カビと同時に鉄筋の防錆を目的とするものであ
る。
この発明において使用する耐アルカリ性防カビ剤と
は、pH9以上でも効力がある防カビ剤をいい、主として
次に示す化合物(防カビ剤)である。
(1)2(4チアゾリール)ベンツイミダゾール[2−
(4−thiazolyl)−benzimidazol](以下TBZとい
う。)
(2)メタホウ酸バリウム
(3)ドデシルグアニジン塩酸塩(Dodecylguanidine h
ydrochloide)(4)ポリヘキサメチレン・バイガナジン塩酸塩
(5)N−ジメチル−N′−フェニル(N′−フロロジ
クロロメチルチオ)−スルファミド
[N−dimetyl−N′−phenyl−(N′−fluorodichlor
ometylthio)−sulfamide]
(6)bis−(ρ−chlorophenyl diguanide)−hexane
dihydrochloride
(7)10,10′−オキシビスフェノオキシアルジン
[10,10′−oxybisphenoxarsine]
(8)2,4,5,6−tetrachlororisophtha−lonitril
(9)2−ヒドロキシジフェニル
[2−hydroxydiphenyl]
(10)3−メチル−4クロローフェノール
[3−metyl−4−chlorophenol]
(11)トリルトリアゾール
[tolyltriazole]
(12)ベンゾトリアゾール
[benzotriazole]
この発明において使用する防錆効果を有する無機塩類
とは、亜硝酸塩(特にカルシウム塩)及びリン酸塩をい
う。
この発明において使用する水溶性ケイ酸塩化合物と
は、ケイ酸のアルカリ金属塩(特にリチウム塩)をい
う。
この発明において使用するセメント系組成物とは、主
としてモルタル組成物をいい、通常は前記耐アルカリ性
防カビ剤を添加したものを使用する。
<試験例>
(1)次に下記の第1表の配合でモルタル組成物及
を作製した。
このモルタルに使用した材料の材質について説明する
と次のとおりである。
(I)セメントは、普通ポルトランドセメント、または
白色セメントを用いた。
(II)硅砂の粒度はあまり大きい粒度の硅砂を用いると
コンシステンシーが悪くなるので直径0.6mm以下が望ま
しい(例えば東洋シリカサンド)。
(III)メチルセルロースは例えば信越化学工業(株)
製Hiメトローズ90SH−4000cp(グリオキザール付加ヒド
ロキシプロピルメチルセルローズ)のものを用いた。
(IV)ステアリン酸カルシウムは、日本油脂製のものを
用いた。
これらのモルタル組成物は、特にタイルの目地材に
適しており、またモルタル組成物は、いわゆる下地調
整材として最適の配合である。
また、前記モルタル組成物、と同時に、白色セメ
ントを使用して調整したモルタル、及びJIS A 6916に記
載されたモルタル(ポリマーセメント系下地調整塗材)
を作製した。
これらの4種類のモルタルの表面に、次の(A)、
(B)2種の防カビ剤溶液((A)7%、(B)4%)
を塗布・含浸させ、防カビ試験に供した。
防カビ剤(A):メタホウ酸バリウム(Busan11−M1
堺化学工業(株)製)。
防カビ剤(B):TBZ(コートサイドR−N 武田薬品工
業(株))。
(2)第2表(巻末)に、前記4種類のモルタルについ
て、その特性値と防カビ試験の結果を示す。
なお、モルタルの特性値の測定方法、及び防カビ試験
は次の註1〜註7に示す方法により行なった。
註1 、、白色セメント及びセメント系下地調整材
のフロー値はJIS R 5201(セメントの物理試験方法)に
準じて行なった。
註2 供試体は脱型後温度20℃、湿度60%の恒温室中で
養生した。
註3 強度試験及び乾燥収縮試験はそれぞれJIS R5201
及びJIS A 1129(モルタル及びコンクリートの長さ変化
試験方法)に準じて行なった。
註4 付着強さ試験はJIS A5304(歩道用コンクリート
平板)の規格製品を用いてコンクリート表面に水しめし
をし厚さ2mmに試料を塗り付けて成形した。材令後、ダ
イヤモンドカッターにより4×4cmの大きさにコンクリ
ート面に達するまで切り込み、エポキシ樹脂接着剤によ
り接着強さ用鉄製アタッチメントを取り付けエポキシ樹
脂接着剤硬化後、建研式引っ張り力試験器により、付着
強さ試験を行なった。なお、付着強さは次式により算出
した。
註5 表面亀裂試験はJIS A5304(歩道用コンクリート
平板)の規格製品を用い、コンクリート表面に水しめし
をし厚さ2mmに試料を塗り付けて成形した。材令28日後
目視観察して亀裂の有無を確認した。
註6 防カビ試験は、JIS Z 2911の一般工業製品の項目
による方法(下記(a))、及び任意の方法(下記
(b))によった。
(a)JIS Z 2911の一般工業製品の項目による方法
使用したカビは、次の5種類である。
Aspergillus niger FERM S−1
Penicillium citrinum FERM S−4
Rhizopus stolonifer FERM S−7
Cradosporium cladosporioides FERM S−8
Chaetoimium globosum FERM S−11
これらのカビの胞子混合懸濁液を調整し前記モルタル
組成物(試料)に噴霧した後、28±2℃、相対湿度95%
以上で4週間培養した。
(b)任意の方法
前記モルタル組成物(試料)に(a)のカビの胞子混
合懸濁液を噴霧した後、栄養液(200gの水にペプトン1
%,食塩0.5g,塩化アンモニウム0.5g,尿素0.5g,乳酸0.2
gを含む水溶液)で汚染させ、28±2℃、相対湿度95%
以上で4週間培養した。
註7 カビの成育程度は、目視ではっきりしないので実
体顕微鏡(×50)で確認した。また、カビの成育程度を
示す第2表中の表示の意味は次の通りである。
表示3:モルタル組成物(試料)のカビを接種した部分に
カビの菌糸の発育がが認められない。
表示2:モルタル組成物(試料)のカビを接種した部分に
認められるカビの菌糸の発育部分の面積は、全面積の1/
3を越えない。
表示1:モルタル組成物(試料)のカビを接種した部分に
認められるカビの菌糸の発育部分の面積は、全面積の1/
3を越える。
第2表の結果は、本願に係る耐アルカリ性防カビ剤を
塗布・含浸したモルタル組成物はカビの発生を充分に防
止することができることを示している。
(3)また、前記4種類のモルタル組成物に対し、前記
(A)、(B)の防カビ剤を各々0.1及び0.5%添加して
製作したモルタル組成物について、(2)と同じ防カビ
試験をしたところ、同じ結果が得られた。
[実施例]
打設後15年経過した地上7階,地下1階の打ち放しコ
ンクリート仕上げの建物(3階以下普通コンクリート,4
階以上軽量コンクリート)はコンクリート表面が粉状化
し、ひび割れ,コンクリートの浮き,鉄筋の露出箇所が
多くなり、数箇所に黒カビが発生したので補修工事が行
なわれることになった。
この建物のコンリートは塩分含有量が0.042%(細骨
材に対して0.16%)あり、中性化深さは25〜35mmあっ
た。この工事においてコンクリート表面を高圧水洗浄乾
燥後、リチウムシリケートを12%含有する表面補強・ア
ルカリ付与剤をローラー刷毛にて追い掛けて2回塗布含
浸(400g/m2)し、その上に亜硝酸カルシウム(防錆
剤)を30%含有し、かつメタホウ酸バリウム(Busan11
−M1 堺化学工業(株)製),及びTBZ(コートサイド
R−N 武田薬品工業(株))を夫々7%、及び3%含
有する溶液をローラー刷毛にて追い掛け2回塗布含浸
(400g/m2)して乾燥した。更にその上に前記防カビ剤
を各々0.1及び0.5%添加したポリマーセメントモルタル
(ポリマーの種類:S.B.R.,ポリマーの含有量:固形分で
4.5%,セメント:砂=1:1)を2mmの厚さに吹き付け、
その硬化後、更にその上に吹付タイルを吹き付けて仕上
げた。
補修1年後に調査を行なったところ何の異常も認めら
れなかった。
[実施例2]
浴室内のタイル製壁の目地に、細かいひび割れが多数
入り、かつ黒カビが一面に発生したので補修工事が行な
われることになった。
この工事において、タイルの目地表面を塩素系の殺菌
剤溶液で洗浄してカビを除去した後、メタホウ酸バリウ
ム(Busan11−M1 堺化学工業(株)製),及びTBZ(コ
ートサイドR−N 武田薬品工業(株))を夫々7%、
及び3%含有する溶液をローラー刷毛にて追い掛け2回
塗布含浸して乾燥した。更にその上に前記防カビ剤を各
々0.1及び0.5%添加した前記モルタル組成物を塗り付
けて仕上げた。
補修1年後に調査を行なったところ、カビは全く発生
せず何の異常も認められなかった。
<発明の効果>
以上のように、この発明に係るコンクリートまたはモ
ルタル組成物表面の防カビ補修工法によれば、既に完成
した建造物の無機質剤の表面のカビを駆除し、また長期
間に渡ってカビの発生を防止し、更に必要に応じてコン
クリートまたはモルタル組成物中の鋼材を防錆すること
ができるという効果を有する。 DETAILED DESCRIPTION OF THE INVENTION <Industrial application field> The present invention eliminates mold on the surface of a completed mortar or mortar composition of a completed building, prevents the occurrence of the mortar, and further, if necessary, adds concrete or mortar. The present invention relates to a method for repairing the surface of a concrete or mortar composition to prevent rust on steel materials in the composition. <Problems to be Solved by Conventional Technique and Invention> Conventionally, in this technical field, a mold-proof gypsum board (JP-A-61-18705) is known.
It was limited to gypsum board, gypsum lath board, perforated gypsum board for sound absorption, and decorative gypsum board, and the fungicide used was also very limited. However, the surface of architectural concrete or mortar compositions often develops mold, especially in humid environments. The generation of mold not only impairs the appearance, but also neutralizes the inside and rusts the reinforcing bars, often causing fatal damage to buildings (buildings). However, there is no means for effectively preventing mold generated on the surface of the building concrete or mortar composition, and when mold is generated, a chlorine-based chemical (chlorine water, hypozinc acid water, etc.) or caustic soda is used. There was only a method of cleaning with a brush etc. The reason is that, since the interior of a building concrete or a mortar composition represented by a mortar or the like is strongly alkaline, a normal fungicide is mixed into the mortar or the like or sprayed on the surface of the concrete or the mortar composition ( Application) has little effect, and even if it is temporarily effective, it is poorly persistent due to alkalinity. Was. Therefore, the present inventors have selected a fungicide that does not decrease its effect even in strong alkali, and using this fungicide, a method for repairing the fungicide on the surface of concrete or mortar composition that semipermanently persists it. As a result of diligent efforts to develop, the present invention has been completed. <Means for Solving the Problems> The present application is constituted by the following two inventions. (1) First invention: A concrete or mortar composition characterized in that an aqueous solution of an alkali-resistant fungicide is applied and impregnated on the surface of a concrete or mortar composition, and then a cement-based composition is further overcoated. Mold prevention repair method. In the first invention, an aqueous solution of an alkali-resistant fungicide is applied and impregnated, and then a cement-based composition is further overcoated so that the fungicide does not flow out to maintain the effect. (2) Second invention: An aqueous solution of an alkali-resistant fungicide and at least one of the following aqueous solutions (A) and (B) are applied and impregnated on the surface of a concrete or mortar composition containing a steel material. After that, a method for repairing the surface of the concrete or mortar composition with anti-mold, characterized by further applying a cement composition. (A) An aqueous solution of an inorganic salt having a rust preventive effect on the steel material. (B) An aqueous solution of a water-soluble silicate compound. In the second invention, when the concrete or mortar composition is a concrete or mortar composition containing a steel material when performing the mold prevention method according to the first invention, the surface of the concrete or mortar composition is alkali-resistant. An aqueous solution of a water-soluble silicate compound for preventing neutralization in a concrete or mortar composition together with an aqueous solution of a fungicide and for reducing salt damage, and / or an inorganic material having a rust-preventive effect on steel. The purpose is to apply and impregnate an aqueous solution of salts to prevent mold and simultaneously rust prevention of reinforcing steel. The alkali-resistant fungicide used in the present invention refers to a fungicide that is effective even at pH 9 or more, and is mainly the following compound (fungicide). (1) 2 (4 thiazolyl) benzimidazole [2-
(4-thiazolyl) -benzimidazol] (hereinafter referred to as TBZ) (2) Barium metaborate (3) Dodecylguanidine hydrochloride
ydrochloide) (4) Polyhexamethylene / viganazine hydrochloride (5) N-dimethyl-N'-phenyl (N'-fluorodichloromethylthio) -sulfamide [N-dimetyl-N'-phenyl- (N'-fluorodichlor
ometylthio) -sulfamide] (6) bis- (ρ-chlorophenyl diguanide) -hexane
dihydrochloride (7) 10,10'-oxybisphenoxarsine [10,10'-oxybisphenoxarsine] (8) 2,4,5,6-tetrachlororisophtha-lonitril (9) 2-hydroxydiphenyl (10) 3-methyl-4-chlorophenol (11) Tolyltriazole (12) Benzotriazole The inorganic salts having a rust-preventive effect used in the present invention include nitrites (particularly calcium salts) and phosphates. The water-soluble silicate compound used in the present invention refers to an alkali metal salt of silicic acid (particularly a lithium salt). The cement-based composition used in the present invention mainly refers to a mortar composition, and usually a composition to which the alkali-resistant fungicide is added. <Test Examples> (1) Next, mortar compositions and the compositions shown in Table 1 below were prepared. The material used for this mortar will be described below. (I) As the cement, ordinary Portland cement or white cement was used. (II) It is preferable that the diameter of the silica sand is 0.6 mm or less (for example, Toyo silica sand), because the use of silica sand having an excessively large particle size deteriorates the consistency. (III) Methyl cellulose is, for example, Shin-Etsu Chemical Co., Ltd.
Manufactured by Hi-Metroze 90SH-4000cp (glyoxal-added hydroxypropylmethylcellulose) was used. (IV) As calcium stearate, one manufactured by NOF Corporation was used. These mortar compositions are particularly suitable for a joint material for tiles, and the mortar composition has an optimum composition as a so-called base adjustment material. Also, the mortar composition, simultaneously with the mortar prepared using a white cement, and the mortar described in JIS A 6916 (polymer cement base adjustment coating material)
Was prepared. On the surface of these four types of mortar, the following (A),
(B) Two kinds of fungicide solutions ((A) 7%, (B) 4%)
Was applied and impregnated, and subjected to an anti-mold test. Antifungal agent (A): Barium metaborate (Busan11-M1
Sakai Chemical Industry Co., Ltd.). Fungicide (B): TBZ (Coatside RN Takeda Pharmaceutical Co., Ltd.). (2) Table 2 (at the end) shows the characteristic values of the four types of mortars and the results of the antifungal test. The method for measuring the characteristic values of the mortar and the anti-mold test were performed by the methods described in the following notes 1 to 7. Note 1: The flow values of the white cement and the cement-based ground conditioning material were measured in accordance with JIS R 5201 (physical test method for cement). Note 2 The specimens were cured after demolding in a constant temperature room at a temperature of 20 ° C and a humidity of 60%. Note 3 The strength test and the drying shrinkage test are each JIS R5201
And JIS A 1129 (Testing method for length change of mortar and concrete). Note 4 The adhesion strength test was performed by rubbing the concrete surface with a standard product of JIS A5304 (concrete flat plate for sidewalk) and applying a sample to a thickness of 2 mm to form it. After the material age, cut into a size of 4 × 4 cm with a diamond cutter until it reaches the concrete surface, attach an iron attachment for adhesion strength with epoxy resin adhesive, cure the epoxy resin adhesive, and use the Kenken type tensile strength tester, An adhesion strength test was performed. The adhesion strength was calculated by the following equation. Note 5: The surface crack test was performed using a standard product of JIS A5304 (concrete flat plate for sidewalk), watering the concrete surface, applying a sample to a thickness of 2 mm, and molding. Twenty-eight days after the material age, visual observation was made to confirm the presence or absence of cracks. Note 6: The anti-mold test was carried out by the method according to JIS Z 2911 for general industrial products ((a) below) and any method ((b) below). (A) The following five types of mold were used according to the method of general industrial products in JIS Z 2911. Aspergillus niger FERM S-1 Penicillium citrinum FERM S-4 Rhizopus stolonifer FERM S-7 Cradosporium cladosporioides FERM S-8 Chaetoimium globosum FERM S-11 A mixed spore suspension of these molds is prepared and added to the mortar composition (sample). After spraying, 28 ± 2 ℃, relative humidity 95%
The above was cultured for 4 weeks. (B) Optional method After spraying the mixed mortar spore suspension of (a) on the mortar composition (sample), a nutrient solution (peptone 1 in 200 g of water)
%, Salt 0.5g, ammonium chloride 0.5g, urea 0.5g, lactic acid 0.2
g + aqueous solution), 28 ± 2 ℃, relative humidity 95%
The above was cultured for 4 weeks. Note 7 The degree of mold growth was not evident visually, so it was confirmed with a stereoscopic microscope (× 50). The meaning of the display in Table 2 showing the degree of mold growth is as follows. Indication 3: No mold hyphal growth was observed in the portion of the mortar composition (sample) inoculated with mold. Indication 2: The area of the mold hyphal growth area observed in the mold inoculated part of the mortar composition (sample) is 1/1 of the total area
Do not exceed 3. Indication 1: The area of the mold hyphal growth area observed in the mold inoculated part of the mortar composition (sample) is 1/1 of the total area.
Over three. The results in Table 2 indicate that the mortar composition coated with and impregnated with the alkali-resistant fungicide according to the present invention can sufficiently prevent the generation of mold. (3) A mortar composition prepared by adding 0.1% and 0.5% of the fungicides (A) and (B) to the four types of mortar compositions, respectively. When tested, the same results were obtained. [Example] A concrete-finished building with 7 floors above ground and 1 basement below 15 years after casting (normal concrete below 3 floors, 4 floors)
(Lightweight concrete above the floor) The concrete surface became powdery, cracks, floating concrete, exposed parts of reinforcing bars increased, and black mold occurred in several places, so repair work was performed. The condominium in this building had a salt content of 0.042% (0.16% based on fine aggregate) and a neutralization depth of 25-35mm. In this work, the concrete surface was washed with high-pressure water and dried, and then a surface reinforcing and alkali-imparting agent containing 12% lithium silicate was applied and impregnated twice (400 g / m 2 ) with a roller brush, followed by calcium nitrite. (Rust inhibitor) and barium metaborate (Busan11)
-M1 Sakai Chemical Industry Co., Ltd.) and TBZ (Coatside RN Takeda Yakuhin Kogyo Co., Ltd.) containing 7% and 3% respectively were chased with a roller brush and applied twice and impregnated (400g / m 2) was then dried. Further, a polymer cement mortar to which 0.1 and 0.5% of the antifungal agent is added, respectively (type of polymer: SBR, content of polymer: solid content
4.5%, cement: sand = 1: 1) is sprayed to a thickness of 2mm,
After the curing, a spray tile was further sprayed thereon to finish. One year after the repair, no abnormalities were found. [Example 2] A large number of fine cracks entered the joints of the tile wall in the bathroom, and black mold occurred on one side, so that repair work was performed. In this construction, the joint surface of the tile was washed with a chlorine-based disinfectant solution to remove mold, and then barium metaborate (Busan11-M1 manufactured by Sakai Chemical Industry Co., Ltd.) and TBZ (Coatside RN Takeda) Pharmaceutical Industry Co., Ltd.)
And a solution containing 3% of the solution was chased twice with a roller brush, applied and impregnated twice, and dried. Further, the mortar composition to which the antifungal agent was added in an amount of 0.1% and 0.5%, respectively, was further applied and finished. One year after the repair, an investigation was carried out. No mold was found and no abnormality was found. <Effects of the Invention> As described above, according to the method for repairing the mold on the surface of the concrete or mortar composition according to the present invention, the mold on the surface of the inorganic agent of the already completed building is eliminated, and for a long period of time. Thus, it has the effect of preventing the occurrence of mold and, if necessary, preventing the steel material in the concrete or mortar composition from rusting.
フロントページの続き (72)発明者 安達 貞男 浦安市猫実4−6−37 第1藤八荘8号 室 (56)参考文献 特開 昭61−18705(JP,A) 特開 昭60−204683(JP,A) 特開 昭57−24457(JP,A) 特開 昭55−78748(JP,A) 特開 昭53−58110(JP,A)Continuation of front page (72) Inventor Sadao Adachi 4-6-37 Utsumi, Urayasu Room (56) References JP-A-61-18705 (JP, A) JP-A-60-204683 (JP, A) JP-A-57-24457 (JP, A) JP-A-55-78748 (JP, A) JP-A-53-58110 (JP, A)
Claims (1)
ルカリ性防カビ剤の水溶液を塗布含浸させた後、更にセ
メント系組成物を上塗することを特徴とするコンクリー
トまたはモルタル組成物表面の防カビ補修工法。 2.セメント系組成物が耐アルカリ性防カビ剤含有モル
タル組成物である特許請求の範囲第1項記載のコンクリ
ートまたはモルタル組成物表面の防カビ補修工法。 3.セメント系組成物がポリマーディスパージョンを含
有するセメント系組成物である特許請求の範囲第1項記
載のコンクリートまたはモルタル組成物表面の防カビ補
修工法。 4.ポリマーディスパージョンがスチレン・ブタジエン
ゴムディスパージョンである特許請求の範囲第3項記載
のコンクリートまたはモルタル組成物表面の防カビ補修
工法。 5.鋼材を内蔵するコンクリートまたはモルタル組成物
の表面に、耐アルカリ性防カビ剤の水溶液と、次の
(A)、(B)に示す水溶液の少なくとも1種を塗布含
浸させた後、更にセメント系組成物を上塗することを特
徴とするコンクリートまたはモルタル組成物表面の防カ
ビ補修工法。 (A)前記鋼材に対して防錆効果を有する無機塩類の水
溶液。 (B)水溶性ケイ酸塩化合物の水溶液。 6.セメント系組成物が耐アルカリ性防カビ剤含有モル
タル組成物である特許請求の範囲第5項記載のコンクリ
ートまたはモルタル組成物表面の防カビ補修工法。 7.無機塩類が亜硝酸塩である特許請求の範囲第5項記
載のコンクリートまたはモルタル組成物表面の防カビ補
修工法。 8.ケイ酸塩化合物がケイ酸リチウムである特許請求の
範囲第5項記載のコンクリートまたはモルタル組成物表
面の防カビ補修工法。 9.セメント系組成物がポリマーディスパージョンを含
有するセメント系組成物である特許請求の範囲第5項記
載のコンクリートまたはモルタル組成物表面の防カビ補
修工法。 10.ポリマーディスパージョンがスチレン・ブタジエ
ンゴムディスパージョンである特許請求の範囲第9項記
載のコンクリートまたはモルタル組成物表面の防カビ補
修工法。(57) [Claims] A method for repairing the surface of a concrete or mortar composition, which is characterized by applying an aqueous solution of an alkali-resistant fungicide to the surface of the concrete or mortar composition, impregnating the solution, and then further applying a cement composition. 2. 2. The method according to claim 1, wherein the cement-based composition is a mortar composition containing an alkali-resistant fungicide. 3. 2. The method according to claim 1, wherein the cement-based composition is a cement-based composition containing a polymer dispersion. 4. 4. The method according to claim 3, wherein the polymer dispersion is a styrene-butadiene rubber dispersion. 5. An aqueous solution of an alkali-resistant fungicide and at least one of the following aqueous solutions (A) and (B) are applied and impregnated on the surface of a concrete or mortar composition containing a steel material. A method for repairing the surface of a concrete or a mortar composition, which is characterized by applying an overcoat. (A) An aqueous solution of an inorganic salt having a rust preventive effect on the steel material. (B) An aqueous solution of a water-soluble silicate compound. 6. 6. The method according to claim 5, wherein the cement composition is a mortar composition containing an alkali-resistant fungicide. 7. 6. The method according to claim 5, wherein the inorganic salt is a nitrite. 8. The method for repairing the surface of concrete or mortar composition according to claim 5, wherein the silicate compound is lithium silicate. 9. The method for repairing the surface of a concrete or mortar composition according to claim 5, wherein the cement composition is a cement composition containing a polymer dispersion. 10. 10. The method according to claim 9, wherein the polymer dispersion is a styrene-butadiene rubber dispersion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62122555A JP2909738B2 (en) | 1987-05-21 | 1987-05-21 | A method for repairing mold and mold on the surface of concrete or mortar composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62122555A JP2909738B2 (en) | 1987-05-21 | 1987-05-21 | A method for repairing mold and mold on the surface of concrete or mortar composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63289149A JPS63289149A (en) | 1988-11-25 |
| JP2909738B2 true JP2909738B2 (en) | 1999-06-23 |
Family
ID=14838783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62122555A Expired - Lifetime JP2909738B2 (en) | 1987-05-21 | 1987-05-21 | A method for repairing mold and mold on the surface of concrete or mortar composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2909738B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5654012A (en) * | 1994-04-22 | 1997-08-05 | Buckman Laboratories International, Inc. | Borates useful for the prevention/mitigation of microbiologically influenced corrosion and staining |
| JP5132079B2 (en) * | 2006-04-26 | 2013-01-30 | マチダコーポレーション株式会社 | Antifouling / antibacterial / antifungal concrete block and method for producing the same |
| JP2009091207A (en) * | 2007-10-10 | 2009-04-30 | Machida Corporation Kk | Concrete block manufacturing method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60204683A (en) * | 1984-03-29 | 1985-10-16 | 株式会社小野田 | Rust prevention of steel material in inorganic material |
| JPS6118705A (en) * | 1984-07-05 | 1986-01-27 | Ig Tech Res Inc | Mildew-proofing gypsum board |
-
1987
- 1987-05-21 JP JP62122555A patent/JP2909738B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63289149A (en) | 1988-11-25 |
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