JPH0148236B2 - - Google Patents
Info
- Publication number
- JPH0148236B2 JPH0148236B2 JP7247784A JP7247784A JPH0148236B2 JP H0148236 B2 JPH0148236 B2 JP H0148236B2 JP 7247784 A JP7247784 A JP 7247784A JP 7247784 A JP7247784 A JP 7247784A JP H0148236 B2 JPH0148236 B2 JP H0148236B2
- Authority
- JP
- Japan
- Prior art keywords
- mortar
- weight
- portland cement
- aggregate
- cement
- 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
Links
- 239000004570 mortar (masonry) Substances 0.000 claims description 44
- 239000000203 mixture Substances 0.000 claims description 22
- 239000011398 Portland cement Substances 0.000 claims description 18
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 17
- 239000004568 cement Substances 0.000 claims description 16
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 claims description 14
- 239000004815 dispersion polymer Substances 0.000 claims description 12
- 239000000839 emulsion Substances 0.000 claims description 6
- 239000006260 foam Substances 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000004794 expanded polystyrene Substances 0.000 claims description 3
- 239000010451 perlite Substances 0.000 claims description 3
- 235000019362 perlite Nutrition 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 229920005992 thermoplastic resin Polymers 0.000 claims description 2
- 239000010455 vermiculite Substances 0.000 claims description 2
- 229910052902 vermiculite Inorganic materials 0.000 claims description 2
- 235000019354 vermiculite Nutrition 0.000 claims description 2
- 239000010440 gypsum Substances 0.000 claims 1
- 229910052602 gypsum Inorganic materials 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 238000010521 absorption reaction Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 238000009413 insulation Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 239000010426 asphalt Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 229910001653 ettringite Inorganic materials 0.000 description 3
- 229920002689 polyvinyl acetate Polymers 0.000 description 3
- 239000011118 polyvinyl acetate Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000005062 Polybutadiene Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 229920002857 polybutadiene Polymers 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- KLIYQWXIWMRMGR-UHFFFAOYSA-N buta-1,3-diene;methyl 2-methylprop-2-enoate Chemical compound C=CC=C.COC(=O)C(C)=C KLIYQWXIWMRMGR-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 229920006248 expandable polystyrene Polymers 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000009408 flooring Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000005332 obsidian Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000011414 polymer cement Substances 0.000 description 1
- 239000011433 polymer cement mortar Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229920006174 synthetic rubber latex Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
- 229910001845 yogo sapphire 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
- C04B28/06—Aluminous cements
- C04B28/065—Calcium aluminosulfate cements, e.g. cements hydrating into ettringite
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)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
本発明はモルタル組成物に関するものであり、
詳しくは、特に弾性に優れたポリマーデイスパー
ジヨンと断熱性に優れた軽量発泡骨材を配合して
なるモルタル組成物に関する。
従来、ポルトランドセメントにポリマーデイス
パージヨン及び軽量発泡骨材を配合したモルタル
組成物は軽量断熱ポリマーセメントモルタルとし
て公知である。このモルタル組成物は軽量で、耐
水性、断熱性に優れており、通常、主に建造物の
内壁あるいは外壁、電車又は船舶などの床材の表
面を化粧するためのモルタルとして利用されてい
る。そのため、モルタルの基材としてコンクリー
ト板、メタルラス、金属板、または屋上防水に用
いられるアスフアルトの保護材として金ゴテ、ス
プレー等により、その表面に塗布されるが、硬化
後のモルタルにクラツクが入りやすい欠点があ
る。
この原因はモルタル自体の収縮により発生する
場合と基板自身がたわみを生じた際、基板の熱膨
張収縮、骨材の吸水性による凍害等、モルタルに
弾性がなく、吸水性が大きいために発生する場合
が考えられる。
本発明者等は上記実情に鑑み、従来の軽量断熱
ポリマーセメントとしての特性を保ちながら、モ
ルタルの弾性、吸水性を改善することにより、モ
ルタルのクラツク発生を防止する方法について
種々検討した結果ある特定の成分を特定の割合で
配合し得たモルタル組成物を用いるときには、モ
ルタル自体の収縮によるクラツク発生もまた基材
自身のたわみによるクラツク発生、骨材の吸水性
による凍害クラツク発生も著しく抑制できること
を見い出し本発明を完成するに至つた。
すなわち、本発明の要旨は、ポルトランドセ
メント、ポルトランドセメントに対して1.5〜
７重量倍のアルミナセメント、ポルトランドセ
メントに対して0.3〜３重量倍の半水石膏及び
ポルトランドセメント、アルミナセメント、及び
半水石膏の和に対してポリマー成分として0.15〜
1.5重量倍のポリマーデイスパージヨンと骨材
として軽量発泡骨材をポルトランドセメント、ア
ルミナセメント、及び半水石膏の和に対して0.02
〜0.5重量倍の軽量発泡骨材を配合してなること
を特徴とするモルタル組成物に存する。
以下、本発明を詳細に説明する。
本発明においては、モルタル組成物として、ポ
ルトランドセメント、アルミナセメント、半水石
膏、ポリマーデイスパージヨン及び軽量発泡骨材
の五成分を含有することを必須要件とするもので
ある。ポルトランドセメント及びアルミナセメン
トとしては、通常の市販品が挙げられ、アルミナ
セメントの含有量はポルトランドセメントに対し
て1.5〜７重量倍、好ましくは2.3〜４重量倍であ
り、アルミナセメントの含有量が前記範囲よりも
少ない場合には、モルタルを塗布した際の硬化速
度が遅いばかりか強度の高いものが得られず、一
方、前記範囲よりも多い場合には、弾性の良好な
モルタルが得られず、クラツクが発生しやすいの
で好ましくない。本発明ではこのようにポルトラ
ンドセメントとアルミナセメントを特定の割合で
併用して使用する点が特徴の一つである。
また、本発明では更に、上述の両セメントとと
もに、半水石膏を存在させるが、半水石膏として
はα型、β型の限定はなく半水石膏の含有量とし
ては、ポルトランドセメントに対して0.3〜３重
量倍、好ましくは0.8〜1.5重量倍である。この半
水石膏の存在によつてより一層弾性に優れ、しか
も、強度も高く、クラツクなどの発生しにくい良
好なモルタル層を得ることができる。
次に本発明で用いられるポリマーデイスパージ
ヨンとしては、水性のものであれば特に限定され
るものではなく、従来公知の種々のものが使用で
きるが、通常ポリアクリル酸エステル、ポリ酢酸
ビニル、ポリ塩化ビニリデン−ポリ塩化ビニル、
ポリプロピオン酸ビニル、ポリエチレン−ポリ酢
酸ビニル、ポリプロピレンなどの熱可塑性樹脂エ
マルシヨン；エポキシ樹脂などの熱硬化性樹脂エ
マルシヨン；アルフアルト、ゴムアスフアルト、
パラフインなどの瀝青質エマルシヨン；クロロプ
レンゴム、スチレン−ブタジエンゴム、アクリロ
ニトリル−ブタジエンゴム、メタクリル酸メチル
−ブタジエンゴム、ブタジエンゴムなどの合成ゴ
ムラテツクス等及びこれらの混合物が挙げられ
る。これらのポリマーデイスパージヨンの含有量
はポルトランドセメント、アルミナセメント、及
び半水石膏の和に対してポリマー成分として、
0.15〜1.5重量倍、好ましくは0.23〜1.1重量倍で
あり、この含有量が前記範囲より少ない場合に
は、モルタルの耐水性が劣るとともに、弾性が著
しく低くなり、逆に、前記範囲よりも多い場合に
は、モルタルの弾性は向上するものの、強度及び
耐久性が悪くなると言う欠点があるので好ましく
ない。
また、骨材の種類としてはバーミキユライト、
パーライト、シリカバルーン、ウレタンフオーム
粉粒体、発泡スチロール粉粒体などの軽量発泡骨
材が用いられるが、粒径0.1mm〜3.0mm、カサ比重
0.02〜0.16の軽量発泡骨材を用いるのが好まし
く、特には黒曜石パーライト、粒状発泡スチロー
ルが最も好ましい。
骨材の含有量は通常、ポルトランドセメント、
アルミナセメント、及び半水石膏の和に対して
0.02〜0.5重量倍、好ましくは0.02〜0.13重量倍で
ある。この含有量が前記範囲より少ない場合には
モルタルの断熱性が劣り、クラツクが発生しやす
くなり、逆に前記範囲よりも多い場合には、モル
タルの断熱性は向上するが、強度及び弾性が著し
く悪くなり、吸水性も大きくなる欠点があるので
好ましくない。
本発明では上述の各成分の他に、本発明の物性
を失わない範囲において、例えば、顔料、分散
剤、充填材などを適宜加えても差し支えない。
上述の各成分を用いてモルタル層を実際に形成
させるには、通常、各成分の混合物を常法に従つ
て、該混合物に対して０〜0.1重量倍の水ととも
に十分に混練し、次いでこれをモルタルスプレー
ガンなどでスプレー又は金ゴテにより実施するこ
とができる。
以上、本発明によれば、モルタルの収縮、又は
基材のたわみによるクラツク発生が著しく少な
く、吸水性が小さく凍害に犯されにくい断熱性、
弾性に優れたモルタルが得られる。本発明におい
て、このような弾性、非吸水性に優れたモルタル
が得られる原因の一つは、本発明の特定の組成の
場合には、モルタルの調整工程で（3CaO・
Al2O3・6H2O）と（CaSO4・2H2O）とが生成し
更に、これによりエトリンガイト（3CaO・
Al2O3・3CaSO4・32H2O）が生成するためであ
る。すなわち、エトリンガイトは針状結晶である
ため、この針状結晶の間隙に樹脂成分が入り込
み、そのため弾性に優れ、クラツクが入りにくい
構造となり、さらに間隙に入り込んだ樹脂成分に
より吸水性が小さくなるのである。またエトリン
ガイトは多量の結晶水を有するので、有機質を比
較的に多く含むモルタルとしても、不燃性、及び
難燃性が優れているので好ましい。
更に本発明では、アルミナセメントを含有する
ため、短時間で内部まで硬化し、モルタルの初期
強度が高く、特に厚塗りをした場合でも、従来の
モルタルが硬化時間が長い為に樹脂分が偏析し、
外部と内部の弾性が異なると言うこともない均一
なモルタルを得ることができる。又、骨材に軽量
発泡骨材を使用しているため、断熱性、作業性の
良好なモルタルを得ることができる。
したがつて、本発明のモルタル組成物は、例え
ば壁材、床材などの表面を化粧するためのモルタ
ルとして特に好ましい。また本発明のモルタル組
成物を塗布する基材としては特に限定されない
が、例えば鉄板、アルミ板、メタルラスなどの金
属板、又はアスフアルトの保護モルタルとして適
用した場合には優れた効果が発揮される。
次に本発明を実施例により更に詳細に説明する
が、本発明はその要旨を越えない限り、以下の記
載に限定されるものではない。
尚、第１表中のNo.以外の数値は「重量部」を示
す。
実施例１〜６及び比較例１〜10
ポルトランドセメント100部に対して、第１表
に示すアルミナセメント、及び半水石膏を混合
し、更に、これに第１表に示すポリマーデイスパ
ージヨンと骨材を混合したものをこれらに対して
0.1時間混練し、次いで、混練した混合物をモル
タル金ゴテにより亜鉛メツキ板に、硬化後の厚さ
が４mmまたは７mmとなるようにそれぞれ塗布し
た。
このようにして得たモルタル層を有する板状物
を60゜まで折り曲げることによりモルタルの弾性
テストを行い、モルタル層のクラツク発生程度を
調べたところ、厚さ４mmの場合は第２表、そして
厚さ７mmの場合は第３表に示す結果を得た。
更に、上述の混合物をJIS R1404吸水試験を行
つた結果、第４表に示す結果を得た。
次に上述の混合物を80×160×40mmの型枠に入
れ熱線法により熱伝導率の測定を行い、第４表に
示す結果を得た。
The present invention relates to a mortar composition,
Specifically, the present invention relates to a mortar composition comprising a polymer dispersion having particularly excellent elasticity and a lightweight foamed aggregate having excellent heat insulation properties. Conventionally, mortar compositions containing Portland cement, polymer dispersion, and lightweight foamed aggregate are known as lightweight insulating polymer cement mortars. This mortar composition is lightweight, has excellent water resistance, and has excellent heat insulation properties, and is usually used as a mortar to decorate the surface of flooring materials, such as interior or exterior walls of buildings, trains, ships, etc. Therefore, as a protective material for concrete plates, metal lath, metal plates, or asphalt used for rooftop waterproofing as a base material for mortar, it is applied to the surface with a metal trowel, spray, etc., but cracks tend to occur in the mortar after hardening. There are drawbacks. This is caused by shrinkage of the mortar itself, when the board itself bends, thermal expansion and contraction of the board, freezing damage due to the water absorption of the aggregate, etc. This occurs because the mortar has no elasticity and has high water absorption. There are possible cases. In view of the above circumstances, the inventors of the present invention have conducted various studies on methods of preventing the occurrence of cracks in mortar by improving the elasticity and water absorption of mortar while maintaining the characteristics of conventional lightweight heat-insulating polymer cement. When using a mortar composition containing the following components in a specific proportion, it is possible to significantly suppress the occurrence of cracks due to shrinkage of the mortar itself, cracks caused by the deflection of the base material itself, and frost damage cracks caused by the water absorption of the aggregate. Heading: The present invention has been completed. In other words, the gist of the present invention is that portland cement, 1.5 to
7 times the weight of alumina cement, 0.3 to 3 times the weight of gypsum hemihydrate relative to Portland cement, and 0.15 to 0.15 as a polymer component relative to the sum of Portland cement, alumina cement, and gypsum hemihydrate.
1.5 times the weight of polymer dispersion and lightweight foamed aggregate as aggregate to 0.02 times the sum of Portland cement, alumina cement, and hemihydrate gypsum.
A mortar composition characterized by containing ~0.5 times the weight of lightweight foamed aggregate. The present invention will be explained in detail below. In the present invention, it is essential that the mortar composition contains five components: portland cement, alumina cement, gypsum hemihydrate, polymer dispersion, and lightweight foamed aggregate. As the Portland cement and alumina cement, common commercially available products may be mentioned, and the content of alumina cement is 1.5 to 7 times, preferably 2.3 to 4 times the weight of Portland cement. If the amount is less than the above range, not only will the curing speed be slow when applying the mortar, but also a high strength product will not be obtained.On the other hand, if the amount is more than the above range, a mortar with good elasticity will not be obtained. This is not preferable because cracks are likely to occur. One of the features of the present invention is that Portland cement and alumina cement are used in combination in a specific ratio. Furthermore, in the present invention, gypsum hemihydrate is present in addition to the above-mentioned both cements, but the gypsum hemihydrate is not limited to α-type or β-type, and the content of gypsum hemihydrate is 0.3 to that of Portland cement. ~3 times by weight, preferably 0.8 to 1.5 times by weight. Due to the presence of this gypsum hemihydrate, it is possible to obtain a good mortar layer that has even better elasticity, has high strength, and is less prone to cracks. Next, the polymer dispersion used in the present invention is not particularly limited as long as it is aqueous, and various conventionally known polymer dispersions can be used, but usually polyacrylic ester, polyvinyl acetate, polyvinyl acetate, Vinylidene chloride - polyvinyl chloride,
Thermoplastic resin emulsion such as polyvinyl propionate, polyethylene-polyvinyl acetate, polypropylene; thermosetting resin emulsion such as epoxy resin; Alphalt, rubber asphalt,
Bituminous emulsions such as paraffin; synthetic rubber latexes such as chloroprene rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber, methyl methacrylate-butadiene rubber, and butadiene rubber; and mixtures thereof. The content of these polymer dispersions is as follows:
The content is 0.15 to 1.5 times by weight, preferably 0.23 to 1.1 times by weight; if this content is less than the above range, the water resistance of the mortar will be poor and the elasticity will be significantly lower; on the contrary, if it is more than the above range In this case, although the elasticity of the mortar is improved, the strength and durability are deteriorated, which is not preferable. In addition, the types of aggregate include vermiculite,
Lightweight foamed aggregates such as perlite, silica balloons, urethane foam powder, and expanded polystyrene powder are used, but the particle size is 0.1 mm to 3.0 mm, and the bulk specific gravity is
It is preferable to use a lightweight foamed aggregate of 0.02 to 0.16, with obsidian perlite and granular expanded polystyrene being most preferred. The aggregate content is usually portland cement,
For the sum of alumina cement and hemihydrate gypsum
The amount is 0.02 to 0.5 times by weight, preferably 0.02 to 0.13 times by weight. If this content is less than the above range, the insulation properties of the mortar will be poor and cracks will easily occur.On the other hand, if it is more than the above range, the insulation properties of the mortar will improve, but the strength and elasticity will be significantly reduced. This is not preferable because it has the drawback of becoming worse and having increased water absorption. In the present invention, in addition to the above-mentioned components, for example, pigments, dispersants, fillers, etc. may be added as appropriate within a range that does not impair the physical properties of the present invention. In order to actually form a mortar layer using each of the above-mentioned components, a mixture of each component is usually thoroughly kneaded with water in an amount of 0 to 0.1 times the weight of the mixture, and then this This can be carried out by spraying with a mortar spray gun or the like or by using a metal trowel. As described above, according to the present invention, the occurrence of cracks due to shrinkage of mortar or deflection of the base material is significantly reduced, water absorption is small, and the insulation property is resistant to frost damage.
Mortar with excellent elasticity can be obtained. In the present invention, one of the reasons for obtaining mortar with such excellent elasticity and non-water absorbing properties is that in the case of the specific composition of the present invention, (3CaO・
Al 2 O 3・6H 2 O) and (CaSO 4・2H 2 O) are generated, which further generates ettringite (3CaO・
This is because Al2O3 ・ 3CaSO4・32H2O ) is generated. In other words, since ettringite is a needle-shaped crystal, the resin component enters the gaps between the needle-shaped crystals, resulting in a structure with excellent elasticity and resistance to cracks, and the resin component that enters the gaps reduces water absorption. . Further, since ettringite has a large amount of crystal water, it is preferable as a mortar containing a relatively large amount of organic matter because it has excellent nonflammability and flame retardancy. Furthermore, since the present invention contains alumina cement, it hardens to the inside in a short period of time, and the initial strength of the mortar is high.Even when a thick coating is applied, the resin content does not segregate because conventional mortar takes a long time to harden. ,
A uniform mortar with no difference in elasticity between the outside and inside can be obtained. Furthermore, since lightweight foamed aggregate is used as the aggregate, mortar with good heat insulation properties and workability can be obtained. Therefore, the mortar composition of the present invention is particularly preferable as a mortar for decorating the surfaces of wall materials, floor materials, etc., for example. Further, the substrate to which the mortar composition of the present invention is applied is not particularly limited, but excellent effects are exhibited when it is applied to metal plates such as iron plates, aluminum plates, metal lath, or as a protective mortar for asphalt. Next, the present invention will be explained in more detail with reference to examples, but the present invention is not limited to the following description unless it exceeds the gist thereof. In addition, numerical values other than No. in Table 1 indicate "parts by weight." Examples 1 to 6 and Comparative Examples 1 to 10 100 parts of Portland cement were mixed with the alumina cement shown in Table 1 and gypsum hemihydrate, and then the polymer dispersion shown in Table 1 and bone For these, mix materials.
After kneading for 0.1 hour, the kneaded mixture was applied onto a galvanized plate using a mortar metal trowel so that the thickness after curing would be 4 mm or 7 mm, respectively. A mortar elasticity test was conducted by bending the plate having the mortar layer obtained in this manner up to 60 degrees, and the degree of cracking in the mortar layer was investigated. When the height was 7 mm, the results shown in Table 3 were obtained. Furthermore, the above mixture was subjected to a JIS R1404 water absorption test, and the results shown in Table 4 were obtained. Next, the above-mentioned mixture was placed in a mold of 80 x 160 x 40 mm, and the thermal conductivity was measured by the hot wire method, and the results shown in Table 4 were obtained.
【表】【table】
【表】
但し、第１表中の「アルミナ」は「アルミナセ
メント」、「ポリマー」は「ポリマーデイスパージ
ヨン」、ポリマーデイスパージヨンの種類として
「Acry」は「ポリアクリル酸エステルエマルシヨ
ン」、「EVA」は「エチレン−酢酸ビニル共重合
エマルシヨン」、骨材として「粒状発泡St」は
「粒状発泡スチロール」を示している。
ポリマーデイスパージヨン、骨材の使用量はポ
ルトランドセメント、アルミナセメント、半水石
膏の和に対するポリマーデイスパージヨン、骨材
の重量割合を示す。
試料No.を示す「実１」、「実２」、……、「実６」
は「実施例１」、「実施例２」、……、「実施例６」
を略記したものであり、同様にして「比１」、「比
２」、……、「比10」は「比較例１」、「比較例２」、
……、「比較例10」を示している。[Table] However, in Table 1, "Alumina" refers to "Alumina Cement,""Polymer" refers to "Polymer Dispersion," and as a type of polymer dispersion, "Acry" refers to "Polyacrylic Acid Ester Emulsion.""EVA" indicates "ethylene-vinyl acetate copolymer emulsion," and "granular foam St" indicates "granular foamed polystyrene" as the aggregate. The amount of polymer dispersion and aggregate used indicates the weight ratio of the polymer dispersion and aggregate to the sum of Portland cement, alumina cement, and gypsum hemihydrate. "Real 1", "Real 2", ..., "Real 6" indicating the sample number
are "Example 1", "Example 2", ..., "Example 6"
Similarly, "ratio 1", "ratio 2", ..., "ratio 10" are "comparative example 1", "comparative example 2",
... indicates "Comparative Example 10".
【表】【table】
【表】【table】
【表】【table】
【表】【table】
【表】【table】
Claims (1)
メントに対して1.5〜７重量倍のアルミナセメン
ト、ポルトランドセメントに対して0.3〜３重
量倍の半水石膏及びポルトランドセメント、ア
ルミナセメント、及び半水石膏の和に対してポリ
マー成分として、0.15〜1.5重量倍のポリマーデ
イスパージヨンと骨材として軽量発泡骨材を配
合してなることを特徴とするモルタル組成物。 ２ 骨材の含有量が、ポルトランドセメント、ア
ルミナセメント及び石膏の和に対して、0.01〜
0.5重量倍である特許請求の範囲第１項記載のモ
ルタル組成物。 ３ 軽量骨材がバーミキユライト、パーライト、
シリカバルーン等の無機質発泡体またはウレタン
フオーム、発泡スチロール等の有機質発泡体粉粒
体、の１種または２種以上を混合物である特許請
求の範囲第１項又は第２項記載のモルタル組成
物。 ４ ポリマーデイスパージヨンが水性の熱可塑性
樹脂エマルジヨンである特許請求の範囲第１項記
載のモルタル組成物。[Claims] 1. Portland cement, alumina cement 1.5 to 7 times the weight of Portland cement, gypsum hemihydrate 0.3 to 3 times the weight of Portland cement, and gypsum hemihydrate of portland cement, alumina cement, and gypsum hemihydrate. A mortar composition comprising a polymer dispersion in an amount of 0.15 to 1.5 times the weight of the polymer component and a lightweight foamed aggregate as an aggregate. 2 The aggregate content is 0.01 to 0.01 to the sum of Portland cement, alumina cement, and gypsum.
The mortar composition according to claim 1, which is 0.5 times by weight. 3 Lightweight aggregates are vermiculite, perlite,
The mortar composition according to claim 1 or 2, which is a mixture of one or more of inorganic foams such as silica balloons, urethane foam, and organic foam powders such as expanded polystyrene. 4. The mortar composition according to claim 1, wherein the polymer dispersion is an aqueous thermoplastic resin emulsion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7247784A JPS60215587A (en) | 1984-04-11 | 1984-04-11 | Mortar composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7247784A JPS60215587A (en) | 1984-04-11 | 1984-04-11 | Mortar composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60215587A JPS60215587A (en) | 1985-10-28 |
| JPH0148236B2 true JPH0148236B2 (en) | 1989-10-18 |
Family
ID=13490438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7247784A Granted JPS60215587A (en) | 1984-04-11 | 1984-04-11 | Mortar composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60215587A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05339043A (en) * | 1992-06-09 | 1993-12-21 | Mitsubishi Yuka Badische Co Ltd | Bark or wooden board-like sheet forming composition |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63218590A (en) * | 1987-03-06 | 1988-09-12 | 金井 正巳 | Wall outer dressing material composition |
| DE4402645C2 (en) * | 1994-01-29 | 1996-11-14 | Knauf Westdeutsche Gips | Gypsum-based light mortar, process for its production and its use |
| DE19517267C1 (en) * | 1995-05-11 | 1997-01-02 | Redco Nv | Material with good fire protection properties and method of manufacturing the same |
| AU2772297A (en) * | 1996-05-13 | 1997-12-05 | Ytong Aktiengesellschaft | Process for producing building material |
| JP5164201B2 (en) * | 2007-12-05 | 2013-03-21 | 太平洋マテリアル株式会社 | Lightweight mortar for low temperature |
-
1984
- 1984-04-11 JP JP7247784A patent/JPS60215587A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05339043A (en) * | 1992-06-09 | 1993-12-21 | Mitsubishi Yuka Badische Co Ltd | Bark or wooden board-like sheet forming composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60215587A (en) | 1985-10-28 |
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