JPS62256749A - Prevention of efflorescence of cement mortar - Google Patents
Prevention of efflorescence of cement mortarInfo
- Publication number
- JPS62256749A JPS62256749A JP9808686A JP9808686A JPS62256749A JP S62256749 A JPS62256749 A JP S62256749A JP 9808686 A JP9808686 A JP 9808686A JP 9808686 A JP9808686 A JP 9808686A JP S62256749 A JPS62256749 A JP S62256749A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- atactic polypropylene
- cement mortar
- molecular 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.)
- Granted
Links
- 239000011083 cement mortar Substances 0.000 title claims description 19
- 238000006253 efflorescence Methods 0.000 title claims description 14
- 206010037844 rash Diseases 0.000 title claims description 14
- 230000002265 prevention Effects 0.000 title 1
- -1 polypropylene Polymers 0.000 claims description 37
- 239000004743 Polypropylene Substances 0.000 claims description 36
- 229920001155 polypropylene Polymers 0.000 claims description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 239000000839 emulsion Substances 0.000 claims description 25
- 239000000203 mixture Substances 0.000 claims description 25
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 16
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 13
- 239000010426 asphalt Substances 0.000 claims description 12
- 239000004568 cement Substances 0.000 claims description 5
- 239000002270 dispersing agent Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 238000010008 shearing Methods 0.000 claims description 2
- 239000004570 mortar (masonry) Substances 0.000 description 18
- 238000004898 kneading Methods 0.000 description 8
- 239000003208 petroleum Substances 0.000 description 7
- 239000011347 resin Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000012190 activator Substances 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- ZSWFCLXCOIISFI-UHFFFAOYSA-N cyclopentadiene Chemical compound C1C=CC=C1 ZSWFCLXCOIISFI-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000000707 stereoselective effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 241000282342 Martes americana Species 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229920003169 water-soluble polymer Polymers 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2611—Polyalkenes
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、セメントモルタルの白華（エフロレフセン
ス）現象を防止する方法に関し、より詳しくは、セメン
トモルタル中に高分子量アタクチックポリプロピレン水
性エマルジョン組成物を配合することによってセメント
モルタルの白華現象を防止する方法に関する。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a method for preventing the efflorescence phenomenon of cement mortar, and more particularly, to a method for preventing the efflorescence phenomenon of cement mortar. The present invention relates to a method of preventing efflorescence of cement mortar by blending a composition.
モルタルの白華現象は、モルタルが外部から水分を吸収
すると炭酸力ルシュウムが溶解して外部へ溶は出し、再
び白い炭酸力ルシュウムの結晶が析出する現象である。Mortar efflorescence is a phenomenon in which when mortar absorbs moisture from the outside, lucium carbonate dissolves and flows out, and white crystals of lucium carbonate precipitate again.
白華現象はモルタル外壁にタイルやその他化粧材を施こ
しである場合、白い結晶が美観を著しく損う。Efflorescence occurs when tiles or other decorative materials are applied to mortar exterior walls, and the white crystals significantly impair the aesthetic appearance.
白華現象を生じた外壁は希塩酸などを用いて、炭酸力ル
シュウムを溶解除去するが、間をおかず、再び白色結晶
を析出し始めるため、その対策は非常にやっかいであっ
て、これまで満足すべき解決策は見出されていない。On the outer wall where the efflorescence phenomenon has occurred, dilute hydrochloric acid is used to dissolve and remove the rhusium carbonate, but white crystals soon start to precipitate again, so countermeasures are very troublesome, and so far none of the methods have been satisfactory. No suitable solution has been found.
本発明の目的はセメントモルタルの白華現象の発生その
ものを有効に防止する方法を提供するにある。An object of the present invention is to provide a method for effectively preventing the occurrence of efflorescence in cement mortar.
本発明のセメントモルタルの白華現象の防止方法は、セ
メントモルタルに対し、該セメントモルタル中のセメン
ト１ｏｏｉｉｔ部に基づき、０．５重量部以上（固型分
換算）の高分子量アタクチンクボリブロピレン水性エマ
ルジョン組成物を配合することを特徴とし、且つ、該高
分子量アタクチックポリプロピレン水性エマルジョン組
成物は平均分子量約３．０００〜約３０，０００を有し
実質的にアタクチックなポリプロピレン、８亥ポリプロ
ピレン１ｌｉｉ１部あたり０．０３〜０．５重量部の部
分ケン化ポリビニルアルコールおよび該部分ケン化ポリ
ビニルアルコール１重量部あたり約０．０５〜２重量部
の水からなる均一混練物を水中に分散してなるものであ
ることを特徴とする。The method for preventing efflorescence in a cement mortar according to the present invention includes adding 0.5 parts by weight or more (in terms of solid content) of high molecular weight atactin kuboribropylene to the cement mortar, based on 10iit part of cement in the cement mortar. wherein the high molecular weight atactic polypropylene aqueous emulsion composition comprises substantially atactic polypropylene having an average molecular weight of about 3.000 to about 30,000; A homogeneous kneaded product consisting of 0.03 to 0.5 parts by weight of partially saponified polyvinyl alcohol per part and about 0.05 to 2 parts by weight of water per 1 part by weight of the partially saponified polyvinyl alcohol is dispersed in water. It is characterized by being something.
上述の方法で用いる高分子量アタクチックポリプロピレ
ン水性エマルジョン組成物に代えて、平均分子量約３０
００〜約３００００を有し実質的にアタクチックなポリ
プロピレン、該アタクチックポリプロピレン１重量部あ
たり０．０３〜０．５重量部の分散剤および該分散剤１
重量部あたり約０．０５〜２重量部の水を剪断力を付与
しながら混練し、得られたルトと混合してなるものを用
いてもよい。In place of the high molecular weight atactic polypropylene aqueous emulsion composition used in the above method, an average molecular weight of about 30
00 to about 30,000 and a substantially atactic polypropylene, 0.03 to 0.5 parts by weight of a dispersant per 1 part by weight of the atactic polypropylene, and the dispersant 1
A product obtained by kneading about 0.05 to 2 parts by weight of water per part by weight while applying a shearing force and mixing it with the obtained rut may be used.
本発明方法の主眼は、モルタル自体を水密化して、炭酸
カルシュラムの溶解を防ぐ点にある。The main focus of the method of the present invention is to make the mortar itself watertight and to prevent dissolution of calcium carbonate.
セメントモルタルとしては、そのまま使用したときに白
華現象を生じるようなものであればいずれも本発明の対
象となる。Any cement mortar that causes efflorescence when used as is is subject to the present invention.
セメントモルタルに配合する高分子量アタクチックポリ
プロピレン組成物は、平均分子量約３．０００〜約３０
，０００を有し実質的にアタクチックなポリプロピレン
、該ポリプロピレン１重量部当り０．０３〜０．５重量
部の部分ケン化ポリビニルアルコールおよび該部分ケン
化ポリビニルアルコール１重量部当り約０．０５〜２重
量部の水からなる均一混練物を水中に分散してなるもの
である。The high molecular weight atactic polypropylene composition blended into the cement mortar has an average molecular weight of about 3.000 to about 30.
,000 and substantially atactic polypropylene, 0.03 to 0.5 parts by weight of partially saponified polyvinyl alcohol per 1 part by weight of the polypropylene, and about 0.05 to 2 parts by weight of partially saponified polyvinyl alcohol per 1 part by weight of the partially saponified polyvinyl alcohol. It is made by dispersing a homogeneous kneaded material consisting of parts by weight of water in water.
ここにおいて使用する「実質的にアタクチックなポリプ
ロピレン」とは、アタクチックポリプロピレンを主成分
とし、これと少量のアイソタクチフクまたはシンジオタ
クチックの如き立体特異性構造を有するポリプロピレン
の低分子量体との混合物を指し、これは通常、立体特異
性触媒によるポリプロピレン、の重金時に重合生成物を
ｎ−へブタンの如き溶剤で抽出することによって得られ
る。As used herein, "substantially atactic polypropylene" refers to a mixture containing atactic polypropylene as a main component and a small amount of low molecular weight polypropylene having a stereospecific structure such as isotactic or syndiotactic. This is usually obtained by extracting the polymerization product of polypropylene with a stereospecific catalyst with a solvent such as n-hebutane.
アタクチックポリプロピレンに対する部分ケン化ポリビ
ニルアルコールの配合量はアタクチックポリプロピレン
１重量部に対し０．０３〜０．５重量部、好ましくは０
．０５〜０．３重量部である。アタクチックポリプロピ
レンに対し乳化剤として作用すると考えられる部分ケン
化ポリビニルアルコールはケン化度７０〜９８％、特に
８０〜９７％のものが好ましい。The amount of partially saponified polyvinyl alcohol added to atactic polypropylene is 0.03 to 0.5 parts by weight, preferably 0.0 to 1 part by weight of atactic polypropylene.
．． 05 to 0.3 parts by weight. The partially saponified polyvinyl alcohol, which is considered to act as an emulsifier for atactic polypropylene, preferably has a degree of saponification of 70 to 98%, particularly 80 to 97%.
水の配合量は、主として部分ケン化ポリビニルアルコー
ルの使用量に依存して変るが、通常部分ケン化ポリビニ
ルアルコール１重量部あたり約０．０５〜２重量部、好
ましくは約０．１〜２重量部の範囲で使用する。部分ケ
ン化ポリビニルアルコールとほぼ等重量乃至１．５倍量
の水を用いて混練すると最も良好なエマルジョンが得ら
れる。The amount of water blended varies mainly depending on the amount of partially saponified polyvinyl alcohol used, but is usually about 0.05 to 2 parts by weight, preferably about 0.1 to 2 parts by weight, per 1 part by weight of partially saponified polyvinyl alcohol. Use within the scope of this section. The best emulsion can be obtained by kneading the partially saponified polyvinyl alcohol with approximately equal to 1.5 times the weight of water.
なお、アタクチックポリプロピレン、部分ケン化ポリビ
ニルアルコールおよび水の三者に少量の石油樹脂を併用
すること（こよって生成するエマルジョンの安定性は一
層向上する。石油樹脂としては、シクロペンタジェンを
主原料とするもの、高級オレフィン系炭化水素を主原料
とするものいずれも使用できるが、常温で固体のものが
好ましい。Note that by using a small amount of petroleum resin in combination with atactic polypropylene, partially saponified polyvinyl alcohol, and water (this further improves the stability of the emulsion produced), cyclopentadiene is the main raw material for the petroleum resin. Although it is possible to use either those containing higher olefinic hydrocarbon as the main raw material, those which are solid at room temperature are preferred.
石油樹脂の配合量は高分子量アタクチックポリプロピレ
ン１重量部に対し約０．０５〜約０．２重量部が好まし
い。The amount of petroleum resin blended is preferably about 0.05 to about 0.2 parts by weight per 1 part by weight of high molecular weight atactic polypropylene.
また、部分ケン化ポリビニルアルコールに加えて少量の
常用される分散剤、例えばオレイン酸ソーダおよびステ
アリン酸ソーダの如きアニオン活性剤やポリオキシエチ
レンアルキルフェノールエーテルの如きノニオン活性剤
を併用してもよい。In addition to the partially saponified polyvinyl alcohol, small amounts of commonly used dispersants, such as anionic activators such as sodium oleate and sodium stearate, and nonionic activators such as polyoxyethylene alkylphenol ether, may also be used.
また、上述の高分子量アタクチックポリプロピレン水性
エマルジョン組成物にアスファルトを加えてもよい。Asphalt may also be added to the above-described high molecular weight atactic polypropylene aqueous emulsion composition.
ここで使用するアスファルトとは、メジウムまたはペト
ローレン、マルテンと呼ばれる炭化水素油状成分を主成
分とし、アスファルト樹脂とよばれる保Ｒｉ’ｆｆおよ
びコロイド粒子状ないし超微粒子状炭素からなるビチュ
ーメンを指し、天然アスファルトであってもまた石油ア
スファルトであってもよい。概して、融点が約６０°Ｃ
〜約１６０℃の範囲のものである。高分子量アククチツ
ク重合体に対するアスファルトの配合量は前者１重量部
あたり０、５〜２．０重量部、好ましくは０．７〜１．
５重量部である。高分子量アタクチックポリプロピレン
に物を製造するには、まず高分子量アククチツクポリフ
ロピレン、部分ケン化ポリビニルアルコールおよび水、
さらに要すれば石油樹脂を充分に均一混練する。混練手
段としては、従来公知のいかなる方法でもよく、例えば
ニーダ−、バンバリーミキサ−が好適に採用出来る。混
練すべき物質の仕込順序には特に制限はないが、前記三
者または四者を同時に混練機に投入するか、あるいは水
溶性高分子と水とのペースト状またはパテ状の混合物を
あらかじめ調製しこれをアタクチックポリプロピレンと
混練するのがよい。均一混練をより効果的に達成するた
めには、混練を加温下に行うのがよい。アスファルトを
加える場合は先ず高分子量アタクチックポリプロピレン
の水性エマルジョンを調製しこれを加熱溶融せるアスフ
ァルトおよび水と混合する。Asphalt used here refers to bitumen whose main component is a hydrocarbon oil component called medium, petroleum, or marten, and consisting of asphalt resin called Ri'ff and colloidal particulate or ultrafine particulate carbon. or petroleum asphalt. Typically has a melting point of about 60°C
to about 160°C. The amount of asphalt added to the high molecular weight acidic polymer is 0.5 to 2.0 parts by weight, preferably 0.7 to 1.0 parts by weight, per 1 part by weight of the former.
5 parts by weight. To produce high molecular weight atactic polypropylene, firstly, high molecular weight atactic polypropylene, partially saponified polyvinyl alcohol and water,
Furthermore, if necessary, petroleum resin is sufficiently and uniformly kneaded. As the kneading means, any conventionally known method may be used, such as a kneader or a Banbury mixer. There is no particular restriction on the order in which the substances to be kneaded are added, but the above three or four substances may be added to the kneader at the same time, or a paste or putty-like mixture of water-soluble polymer and water may be prepared in advance. This is preferably kneaded with atactic polypropylene. In order to achieve uniform kneading more effectively, kneading is preferably carried out under heating. When asphalt is added, an aqueous emulsion of high molecular weight atactic polypropylene is first prepared and mixed with heat-meltable asphalt and water.
かくして得られた均一混練物質は、次いで多量の水と均
一混合することにより、直ちに安定なエマルジョン状と
なり、ここに高分子量アタクチックポリプロピレンのエ
マルジョン状組成物が形成される。なお、該組成物の低
温での安定性をよくするために、温度を低下してほぼ常
温で混練物質と水を均一混合するのが望ましい。得られ
る水性エマルジョンは非常に安定で、温度変化、長期間
の放置および水に、よる希釈によって殆ど変化しない。The homogeneously kneaded material thus obtained is then uniformly mixed with a large amount of water to immediately form a stable emulsion, thereby forming an emulsion-like composition of high molecular weight atactic polypropylene. In order to improve the stability of the composition at low temperatures, it is desirable to lower the temperature and uniformly mix the kneaded material and water at approximately room temperature. The resulting aqueous emulsion is very stable and changes little by temperature changes, long-term standing, and dilution with water.
一般に、水性エマルジョン中の高分子量アククチツク重
合体濃度が３０〜６０重量％程度とするのが望ましい。Generally, it is desirable that the concentration of high molecular weight active polymer in the aqueous emulsion be about 30 to 60% by weight.
高分子量アタクチックポリプロピレン水性エマルジョン
組成物のセメントモルタルへの混入量はモルタルに使用
されるセメント１００重量部に対し、エマルジョンは０
．５重量部以上（固型分換算）であれば良く、普通はモ
ルタルの諸性能への効果を考えて１〜３重量部混入する
。The amount of high molecular weight atactic polypropylene aqueous emulsion composition mixed into cement mortar is 0 parts by weight of the emulsion per 100 parts by weight of cement used in the mortar.
．． It is sufficient if the amount is 5 parts by weight or more (in terms of solid content), and usually 1 to 3 parts by weight is mixed in consideration of the effect on various properties of the mortar.
エマルジョンの混入方法としては、生コンクリート工場
のバッチャ−でモルタルを混練する際、エマルジョンも
同時に混合する方法、或は生モルタル輸送用トランクア
ジテータ−にエマルジョンを投入し、高速で３分間程度
混練する方法、更には、建築現場で使用するモルタルミ
キサーにエマルジョンを投入して混練する方法のいずれ
も採用可能である。The method for mixing the emulsion is to mix the emulsion at the same time when kneading the mortar in a batcher at a fresh concrete factory, or to put the emulsion into a trunk agitator for transporting fresh mortar and mix it at high speed for about 3 minutes. Furthermore, any of the methods of putting the emulsion into a mortar mixer used at construction sites and kneading it can be adopted.
本発明方法によれば高分子量アタクチックポリプロピレ
ン組成物がモルタルの空隙に充填される結果、水密とな
り、モルタルに水分が吸収され難くなり、炭酸カルシウ
ムの溶出に基づく白華現象が防止される。また、モルタ
ルの乾燥収縮率が城少し、モルタルにひび割れが生じ難
くなる。According to the method of the present invention, the voids of the mortar are filled with the high molecular weight atactic polypropylene composition, making the mortar watertight, making it difficult for moisture to be absorbed into the mortar, and preventing efflorescence caused by elution of calcium carbonate. In addition, the drying shrinkage rate of the mortar is reduced, making it difficult for cracks to occur in the mortar.
以下、実施例について本発明を具体的に説明する。 The present invention will be specifically described below with reference to Examples.
実施例１，２、比較例１
下記の化合物
アタクチックポリプロピレン １０００ ｇ（平均
分子量約２１．０００）
石油樹脂６０＃（東邦樹脂製）９５ｇ
ポリビニルアルコール（ケン化１５０ｇ度８８％）
（日本合成化学ｐｖ＾２１７）
水 １５０
ｇを加圧されたニーダ−中で内部温度９０℃にて２０
分間混練し、次いで６０℃にて水３００ｇを添加混合し
、更に多量の冷水を添加して１０分間混合し、固形分５
０重量％のエマルジョン状組成物を得た。Examples 1 and 2, Comparative Example 1 The following compounds Atactic polypropylene 1000 g (average molecular weight approximately 21.000) Petroleum resin 60# (manufactured by Toho Jushi) 95 g Polyvinyl alcohol (Saponified 150 g 88%) (Nippon Gosei PV ^217) Water 150
20 g in a pressurized kneader at an internal temperature of 90°C.
After kneading for 1 minute, 300 g of water was added and mixed at 60°C, and a large amount of cold water was added and mixed for 10 minutes.
A 0% by weight emulsion-like composition was obtained.
セメントモルタルに上記エマルジョン状組成物を下記表
１に示す割合（Ｂ）で誘会半配合し、その硬化物の吸水
比および透水比をテストした〈実施例１）。結果を表１
に示す。The above emulsion-like composition was mixed into cement mortar at the ratio (B) shown in Table 1 below, and the water absorption ratio and water permeability ratio of the cured product were tested (Example 1). Table 1 shows the results.
Shown below.
比較のために、上記エマルジョン状組成物を配合しない
普通モルタル（Ａ）について同様にテストした（比較例
１）。結果を表１に示す。For comparison, ordinary mortar (A) without the above emulsion composition was similarly tested (Comparative Example 1). The results are shown in Table 1.
また、上記エマルジョン状組成物（６０°Ｃ）に約１５
０℃のアスファルトを徐々に添加しく配合割合はエマル
ジョン中のアククチソクボリプロビレン工重量部に対し
アスファルト１．４重量部）、添加終了後約１０分間攪
拌して、アスファルト含有水性エマルジョン組成物を得
た。この組成物をセメントモルタルに配合したもの（Ｃ
）についても同様にテストした（実施例２）。結果を表
１に示す。In addition, about 15% of the emulsion composition (60°C)
Gradually add asphalt at 0°C (mixing ratio: 1.4 parts by weight of asphalt per part of active polypropylene in the emulsion), stir for about 10 minutes after the addition is complete, and prepare an asphalt-containing aqueous emulsion composition. I got it. This composition was mixed with cement mortar (C
) was similarly tested (Example 2). The results are shown in Table 1.
以下余白
表−１
此ｌ■１１ 犬ｊピ生Ｌ ス財ｌ」ｌ普通モルタル
エマルジョン人モルタル エマル５１ン入Ａ
Ｂ ｕ久１−一
χΣ配合組成：
ボルトランドセメント ４００ ｋｇ／ｍ’
４００ ｋ＋ｒ／ｍコ ４００細骨材
１２００ 〃１２００ 〃１２００エマルジフン
Ｏ〃 １２ 〃
１５吸水比” １００ １３
１２透水比” １００ ３６
３４申−ＪＩＳ−Ａ−１４０４
１水圧２０ｋｇ／ｃｎ＋”にて４８時間保持後水が浸透
した深さを測定。Margin table below - 1 This l ■ 11 Inu J Pi student L Susei l'l Ordinary mortar Emulsion human mortar Emul 51 pieces A
Bukyu 1-1 χΣBlending composition: Boltland cement 400 kg/m'
400 k+r/mko 400 fine aggregate
1200 〃1200 〃1200 emulsion
O〃 12 〃
15 water absorption ratio” 100 13
12 Water permeability ratio” 100 36
34-JIS-A-1404 1 After holding for 48 hours at a water pressure of 20 kg/cn+, the depth to which water penetrated was measured.
上記Ｂ配合のモルタルにてコンクリート造の外壁に塗布
し、その上からタイル貼りした。 ３ケ年を経過する
が、白華現象は全く見られない。Mortar of the above blend B was applied to the concrete exterior wall, and tiles were pasted on top. Three years have passed, but no efflorescence has been observed.
Claims (1)
セメント１００重量部に基づき、０．５重量部以上（固
型分換算）の高分子量アタクチックポリプロピレン水性
エマルジョン組成物を配合することを特徴とし、且つ、
該高分子量アタクチックポリプロピレン水性エマルジョ
ン組成物は平均分子量約３，０００〜約３０，０００を
有し実質的にアタクチックなポリプロピレン、該ポリプ
ロピレン１重量部あたり０．０３〜０．５重量部の部分
ケン化ポリビニルアルコールおよび該部分ケン化ポリビ
ニルアルコール１重量部あたり約０．０５〜２重量部の
水からなる均一混練物を水中に分散してなるものである
ことを特徴とするセメントモルタルの白華現象を防止す
る方法。 ２、セメントモルタルに対し、該セメントモルタル中の
セメント１００重量部に基づき、０．５重量部以上（固
型分換算）の高分子量アタクチックポリプロピレン水性
エマルジョン組成物を配合することを特徴とし、且つ、
該高分子量アタクチックポリプロピレン水性エマルジョ
ン組成物は平均分子量約３０００〜約３００００を有し
実質的にアタクチックなポリプロピレン、該アタクチッ
クポリプロピレン１重量部あたり０．０３〜０．５重量
部の分散剤および該分散剤１重量部あたり約０．０５〜
２重量部の水を剪断力を付与しながら混練し、得られた
均一混練物を水および上記アタクチックポリプロピレン
１重量部あたり０．５〜２．０重量部のアスファルトと
混合してなるものであることを特徴とするセメントモル
タルの白華現象を防止する方法。[Claims] 1. 0.5 parts by weight or more (in terms of solid content) of a high molecular weight atactic polypropylene aqueous emulsion composition is blended into cement mortar based on 100 parts by weight of cement in the cement mortar. It is characterized by, and
The high molecular weight atactic polypropylene aqueous emulsion composition comprises substantially atactic polypropylene having an average molecular weight of about 3,000 to about 30,000, 0.03 to 0.5 parts by weight of partial carbon per part by weight of the polypropylene. The efflorescence phenomenon of a cement mortar characterized in that it is made by dispersing in water a homogeneous kneaded product consisting of a partially saponified polyvinyl alcohol and about 0.05 to 2 parts by weight of water per 1 part by weight of the partially saponified polyvinyl alcohol. How to prevent it. 2. A high molecular weight atactic polypropylene aqueous emulsion composition of 0.5 parts by weight or more (in terms of solid content) is blended into the cement mortar based on 100 parts by weight of cement in the cement mortar, and ,
The high molecular weight atactic polypropylene aqueous emulsion composition comprises a substantially atactic polypropylene having an average molecular weight of about 3,000 to about 30,000, 0.03 to 0.5 parts by weight of a dispersant per 1 part by weight of the atactic polypropylene, and Approximately 0.05 to 1 part by weight of dispersant
2 parts by weight of water is kneaded while applying a shearing force, and the resulting homogeneous kneaded product is mixed with water and 0.5 to 2.0 parts by weight of asphalt per 1 part by weight of the atactic polypropylene. A method for preventing efflorescence of cement mortar, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9808686A JPS62256749A (en) | 1986-04-30 | 1986-04-30 | Prevention of efflorescence of cement mortar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9808686A JPS62256749A (en) | 1986-04-30 | 1986-04-30 | Prevention of efflorescence of cement mortar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62256749A true JPS62256749A (en) | 1987-11-09 |
| JPH028988B2 JPH028988B2 (en) | 1990-02-28 |
Family
ID=14210531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9808686A Granted JPS62256749A (en) | 1986-04-30 | 1986-04-30 | Prevention of efflorescence of cement mortar |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62256749A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU734095B2 (en) * | 1997-09-12 | 2001-06-07 | William W. Supplee | Additive for, method of adding thereof and resulting cured cement-type concreations for improved heat and freeze-thaw durability |
| JP2011001222A (en) * | 2009-06-18 | 2011-01-06 | Ohbayashi Corp | Polymer cement mortar and finishing method |
-
1986
- 1986-04-30 JP JP9808686A patent/JPS62256749A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU734095B2 (en) * | 1997-09-12 | 2001-06-07 | William W. Supplee | Additive for, method of adding thereof and resulting cured cement-type concreations for improved heat and freeze-thaw durability |
| JP2011001222A (en) * | 2009-06-18 | 2011-01-06 | Ohbayashi Corp | Polymer cement mortar and finishing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH028988B2 (en) | 1990-02-28 |
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