JP2009137787A - Lightweight mortar for low temperature use - Google Patents

Lightweight mortar for low temperature use Download PDF

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JP2009137787A
JP2009137787A JP2007314284A JP2007314284A JP2009137787A JP 2009137787 A JP2009137787 A JP 2009137787A JP 2007314284 A JP2007314284 A JP 2007314284A JP 2007314284 A JP2007314284 A JP 2007314284A JP 2009137787 A JP2009137787 A JP 2009137787A
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mortar
lightweight
cement
mass
temperature
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JP5164201B2 (en
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Toshiyuki Saeki
俊之 佐伯
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Taiheiyo Material Kk
太平洋マテリアル株式会社
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions 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
    • C04B28/06Aluminous cements

Abstract

<P>PROBLEM TO BE SOLVED: To provide lightweight cement based mortar particularly suitable for use in plaster application such as troweling to a building, whose operability upon production and application is satisfactory, and which hardly cuases phenomena such as reduction of strength, cracking, floating and peeling over a long period after the application, and whose applied material hardly suffers from frost damage even if being exposed to low temperature less than a freezing point, and which has satisfactory applicability and high durability even at low temperature. <P>SOLUTION: Disclosed is lightweight mortar for low temperature use comprising: a lightweight fine aggregate; alumina cement; plaster; a setting modifier; a moisturizer; and normal fine-grained aggregates. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、例えば住宅外壁などの建築物の外装用やその下塗り用に施工使用するセメント系の軽量モルタルであって、常温はもとより低温環境でも好適に使用できる軽量モルタルに関する。   The present invention relates to a lightweight cement-based mortar that is used for exterior or undercoating of a building such as an outer wall of a house, and can be suitably used not only at room temperature but also in a low-temperature environment.
戸建て住宅の外壁などの建築物の外装施工は、一般にモルタルで下塗りを行い、またモルタル硬化後の表面に、例えば樹脂リシンや掻き落しリシンのような有機系又はセメント系の仕上材を施工する。使用するモルタルは、火災被害を防ぐ上で良好な防火性や断熱性が得られ、また施工時の自重による垂れや剥落等が起こり難く、さらには建築物の荷重負荷を軽減できることから、例えば高分子樹脂や鉱物質原料からなる発泡粒や多孔質粒などの軽量骨材を用いて軽量化を図ったセメント系のモルタルが使用されている。軽量骨材使用のモルタルは、普通骨材や重量骨材使用のモルタルに比べて単位水量が多くなるため、硬化が遅延する傾向がある。この傾向は温度が低くなるに連れ強まるので、施工物が氷点以下の低温に曝される可能性がある場合、防凍剤をモルタルに混和し、セメントの水和熱を高めて凍害を防ぐことが行われている。しかし、市販防凍剤は、主に普通骨材を使用したモルタル・コンクリートに適合するよう調整されているため、単位水量の多い軽量モルタルでは、防凍剤で調整された水和発熱のピークを過ぎても硬化が十分進んでいないことがあった。このような軽量モルタル施工物が冬季夜間などの厳寒環境に曝されると、表面の残水率が高いことから初期凍害を受ける虞がある。一方、硬化速度が速いモルタルとしてアルミナセメントを用いた速硬性のモルタルも知られている。(例えば、特許文献1参照。)当該文献で開示された速硬性のモルタル例は砂を細骨材に使用したもので、単位容積質量が高く、軽量モルタルとは云えず、断熱性や厚付け施工性を備えるものでは無い。しかも、アルミナセメントの使用により凝結速度も早まるので、可使時間が減少し、左官施工作業性に支障を及ぼす。この他にも、左官施工性向上の為に、カオリナイトやモンモリロナイトのような特定の粘土鉱物と高分子増粘剤及びパーライト等の無機物質を含む左官モルタル用混和材も知られている。(例えば、特許文献2参照。)しかし、この種の混和材だけでは低温環境で生じる前記の問題は解決されない。また、アルミナセメントとアルミナセメントクリンカとホルマイト系粘土鉱物を用いたモルタルが、鏝塗り作業性を向上でき、高い耐酸性を有することも知られている。(例えば、特許文献3参照。)このモルタルはアルミナセメントを耐酸成分に活用した耐酸モルタルであり、硬化速度の促進による低温下でのモルタル施工状況改善を行うものではない。
特開平4−132648号公報 特開2006−160589号公報 特開2007−70153号公報
For exterior construction of a building such as an outer wall of a detached house, generally, mortar is primed, and an organic or cement-based finish such as resin lysine or scraped lysine is applied to the surface after mortar is cured. The mortar used has good fire resistance and heat insulation properties to prevent fire damage, is unlikely to sag or peel off due to its own weight during construction, and can reduce the load load on the building. Cement-based mortars that have been reduced in weight by using lightweight aggregates such as foam particles and porous particles made of molecular resins and mineral materials are used. Mortars using lightweight aggregates tend to be delayed in hardening because they have more unit water than mortars using ordinary or heavy aggregates. This tendency increases as the temperature decreases, so if the work is likely to be exposed to low temperatures below the freezing point, an anti-freezing agent may be added to the mortar to increase the heat of hydration of the cement and prevent frost damage. Has been done. However, commercial antifreezes are mainly adjusted to be compatible with mortar and concrete using ordinary aggregates, so light weight mortar with a large amount of unit water passes the peak of hydration fever adjusted with antifreeze. However, the curing was not sufficiently advanced. When such a lightweight mortar construction object is exposed to a severe cold environment such as a winter night, there is a risk of receiving an initial frost damage due to the high residual water rate on the surface. On the other hand, a fast-curing mortar using alumina cement is also known as a mortar having a high curing rate. (For example, refer to Patent Document 1.) Examples of fast-hardening mortars disclosed in this document are those using sand as fine aggregates, which have a high unit volume mass and are not lightweight mortars, and are heat insulating and thickened. It does not have workability. In addition, the use of alumina cement increases the setting speed, which reduces the pot life and impairs the plastering workability. In addition, a plastering mortar admixture containing a specific clay mineral such as kaolinite and montmorillonite, a polymer thickener, and an inorganic substance such as perlite is also known for improving plastering workability. (For example, refer to Patent Document 2.) However, the above-mentioned problem that occurs in a low-temperature environment cannot be solved only by this type of admixture. It is also known that mortars using alumina cement, alumina cement clinker and holmite clay mineral can improve the workability of glazing and have high acid resistance. (For example, refer to Patent Document 3.) This mortar is an acid-resistant mortar using alumina cement as an acid-resistant component, and does not improve the mortar construction status at low temperatures by promoting the curing rate.
JP-A-4-132648 JP 2006-160589 A JP 2007-70153 A
本発明は、例えば建築物等への左官施工時の作業性が良好な軽量モルタルであり、施工後は長期に渡り、強度低下、ひび割れ、浮き、剥離といった現象が起き難く、さらには施工物が厳寒低温に曝されても凍害を被り難く、低温でも良好な施工性と高い耐久性を備えたセメント系の軽量モルタルを提供するものである。   The present invention is a lightweight mortar with good workability at the time of plastering, for example, to a building, etc., and after the construction for a long period of time, it is difficult for phenomena such as strength reduction, cracking, floating and peeling to occur. It is intended to provide a cement-based lightweight mortar that is not subject to frost damage even when exposed to severe cold temperatures and that has good workability and high durability even at low temperatures.
本発明者は、軽量骨材を細骨材に用い、これに微粒普通骨材を加え、さらにアルミナセメント、石膏等、保水剤及び凝結調整剤を加えることにより、長期に渡り、強度低下、ひび割れ、浮き、剥離といった現象が起き難く、さらに施工物が厳寒低温下に曝されても凍害を被り難く、低温環境下での耐久性に優れたセメント系の軽量モルタルが得られる等の知見を得、本発明を完成させるに至った。   The present inventor uses lightweight aggregates for fine aggregates, adds fine ordinary aggregates thereto, and further adds alumina cement, gypsum, etc., water retention agents and setting modifiers, over a long period of time, reducing strength, cracking. Acquired knowledge that phenomena such as floating and peeling are unlikely to occur, and that construction works are not subject to frost damage even when exposed to extremely cold temperatures, and that cement-based lightweight mortars with excellent durability in low-temperature environments can be obtained. The present invention has been completed.
即ち、本発明は、以下の(1)〜(4)で表す低温用軽量モルタルである。(1)軽量細骨材、アルミナセメント、石膏、凝結調整剤、保水剤及び普通微粒骨材を含有してなる低温用軽量モルタル。(2)普通微粒骨材が最大粒径150μm以下の無機系材質からなる普通骨材である前記(1)の低温用軽量モルタル。(3)さらに、含水粘土鉱物を含有してなる前記(1)又は(2)の低温用軽量モルタル。(4)さらに、ポリマーディスパージョン又は再乳化粉末樹脂を含有してなる前記(1)〜(3)何れかの低温用軽量モルタル。   That is, the present invention is a low-temperature lightweight mortar represented by the following (1) to (4). (1) A light-weight mortar for low temperature, comprising light-weight fine aggregate, alumina cement, gypsum, setting modifier, water retention agent and ordinary fine-grain aggregate. (2) The low-temperature light mortar according to (1), wherein the normal fine aggregate is a normal aggregate made of an inorganic material having a maximum particle size of 150 μm or less. (3) The light-weight mortar for low temperature according to (1) or (2), further comprising a hydrous clay mineral. (4) The low-temperature lightweight mortar according to any one of (1) to (3), further comprising a polymer dispersion or a re-emulsified powder resin.
本発明によれば、例えば建築物の外装用などとして氷点以下の厳寒の環境下に曝されるような用途でも十分適用でき、常温は勿論、低温でも優れた施工性と高い耐久性を備えた軽量モルタルが得られる。   According to the present invention, for example, it can be sufficiently applied even in applications where it is exposed to an extremely cold environment below the freezing point, for example, for an exterior of a building, and has excellent workability and high durability at low temperatures as well as normal temperatures. A lightweight mortar is obtained.
本発明の低温用軽量モルタルは、軽量骨材を使用して軽量化したモルタルである。使用する軽量骨材は特に限定されるものではない。好ましくは施工性を高め易いことから嵩比重が1以下の骨材とする。一例を示すと、エチレン酢酸ビニル共重合体と炭酸カルシウムの発泡複合体、発泡ポリスチレン系樹脂、天然又は人工の多孔質無機系骨材、概ね中空状の無機系骨材であるパーライト等を挙げることができる。より好ましくは、左官施工性に優れたモルタル組成物が得られ易いことから、エチレン酢酸ビニル共重合体と炭酸カルシウムの発泡複合体、発泡ポリスチレン系樹脂及びパーライトの3種の混合細骨材とする。この場合の各細骨材の混合割合は、エチレン酢酸ビニル共重合体と炭酸カルシウムの発泡複合体100体積部に対し、発泡ポリスチレン系樹脂76〜142体積部及びパーライト150〜276体積部が望ましい。軽量骨材全体の使用量は、本モルタル中のセメント(アルミナセメントを含む。)含有量100質量部に対し、30〜40質量部が好ましい。30質量部未満では、モルタルの軽量化が困難となる他、鏝塗り等の左官施工性の低下や建築物に必要な耐火・耐熱性を確保し難くなるので適当ではない。また40質量部を超えると強度低下や仕上げ材との付着性低下が起こるので適当ではない。   The low-temperature lightweight mortar of the present invention is a mortar reduced in weight using a lightweight aggregate. The lightweight aggregate to be used is not particularly limited. Preferably, the aggregate has a bulk specific gravity of 1 or less because it is easy to improve the workability. Examples include foamed composites of ethylene vinyl acetate copolymer and calcium carbonate, expanded polystyrene resins, natural or artificial porous inorganic aggregates, perlite which is generally hollow inorganic aggregates, etc. Can do. More preferably, since a mortar composition excellent in plastering workability is easily obtained, a mixed fine aggregate of three kinds of an ethylene vinyl acetate copolymer and a calcium carbonate foam composite, a foamed polystyrene resin and perlite is used. . The mixing ratio of each fine aggregate in this case is desirably 76 to 142 parts by volume of polystyrene foam resin and 150 to 276 parts by volume of pearlite with respect to 100 parts by volume of the foamed composite of ethylene vinyl acetate copolymer and calcium carbonate. The total amount of the lightweight aggregate is preferably 30 to 40 parts by mass with respect to 100 parts by mass of cement (including alumina cement) in the mortar. If the amount is less than 30 parts by mass, it is difficult to reduce the weight of the mortar, it is difficult to reduce plastering workability such as plastering, and it is difficult to ensure the fire resistance and heat resistance necessary for the building. On the other hand, if it exceeds 40 parts by mass, the strength and adhesion to the finish will be reduced, which is not suitable.
本発明の低温用軽量モルタルに使用するアルミナセメントは特に限定されず、例えば市販のアルミナセメントなら何れのものでも使用できる。本発明の軽量モルタル中のアルミナセメント含有量は、7〜16質量%が好ましい。より好ましくは9〜14質量%とする。7質量%未満では凍害抵抗性が低下するなど低温での施工が困難になり、また16質量%を超えると長期強度低下やひび割れ発生の虞がある他、施工時の作業時間が確保し難くなることから、適当ではない。   The alumina cement used in the low-temperature lightweight mortar of the present invention is not particularly limited, and any commercially available alumina cement can be used. The alumina cement content in the lightweight mortar of the present invention is preferably 7 to 16% by mass. More preferably, the content is 9 to 14% by mass. If it is less than 7% by mass, construction at a low temperature becomes difficult because the resistance to freezing damage is reduced, and if it exceeds 16% by mass, there is a risk of long-term strength reduction and cracking, and it is difficult to secure work time during construction. That is not appropriate.
本発明の低温用軽量モルタルに使用する石膏は、好ましくは無水石膏とする。無水石膏以外の石膏を無水石膏と併用することもできる。石膏によりアルミナセメントの水和反応生成物に起因する長時間強度の激減を防止し、持続的に安定した強度発現性が得られる他、収縮変形の抑制にも貢献する。本モルタル中の石膏含有量は、軽量モルタル中のアルミナセメント含有量100質量部に対し、20〜30質量部が好ましい。20質量部未満では長期強度発現性が低下し、大きな収縮変形やひび割れを起こし易くなるので適当ではない。また30質量部を超えると凝結が遅延するので適当ではない。   The gypsum used in the low-temperature lightweight mortar of the present invention is preferably anhydrous gypsum. Gypsum other than anhydrous gypsum can also be used in combination with anhydrous gypsum. Gypsum prevents long-term strength from being drastically reduced due to the hydration reaction product of alumina cement, and provides a stable and stable strength development, and also contributes to suppression of shrinkage deformation. The gypsum content in the mortar is preferably 20 to 30 parts by mass with respect to 100 parts by mass of the alumina cement content in the lightweight mortar. If the amount is less than 20 parts by mass, the long-term strength development property is lowered, and large shrinkage deformation and cracking are likely to occur. On the other hand, if it exceeds 30 parts by mass, the setting is not suitable because the setting is delayed.
本発明の低温用軽量モルタルに使用する保水剤は、モルタルやコンクリートに使用できるもので、液状又は水に可溶なものなら何れのものでも良い。好ましくは、保水性能に優れ、施工に適した粘性が得られる易いことからセルロース系の保水剤を使用する。具体的には、例えばメチルセルロース、カルボキシメチルセルロース、ヒドロキシプロピルメチルセルロース、ヒドロキシエチルセルロース、ヒドロキシエチルメチルセルロース、ヒドロキシプロピルセルロース、セルロース硫酸エステル等の水溶性セルロース誘導体を有効成分とする保水剤を挙げることができる。保水剤の使用によりモルタル施工物の急速な乾燥収縮を防ぐことができる。また、セルロース系保水剤ではその粘性により、鏝施工に適したコンシステンシーが得られ易くなる。保水剤の含有量は、モルタルに含有するセメント(アルミナセメントを含む。)100質量部に対し、0.2〜0.31質量部が好ましい。0.2質量部未満では、適切な保水性を付与できないことがある。また0.31質量部を超えると粘度が上昇し、施工性が低下するので適当ではない。   The water retention agent used in the low-temperature lightweight mortar of the present invention can be used for mortar and concrete, and any one may be used as long as it is liquid or soluble in water. Preferably, a cellulosic water-retaining agent is used because it has excellent water retention performance and a viscosity suitable for construction is easily obtained. Specific examples include water retention agents containing water-soluble cellulose derivatives such as methylcellulose, carboxymethylcellulose, hydroxypropylmethylcellulose, hydroxyethylcellulose, hydroxyethylmethylcellulose, hydroxypropylcellulose, and cellulose sulfate as active ingredients. The use of a water retention agent can prevent rapid drying shrinkage of the mortar construction. In addition, in the case of a cellulosic water retaining agent, it becomes easy to obtain a consistency suitable for dredging due to its viscosity. The content of the water retention agent is preferably 0.2 to 0.31 parts by mass with respect to 100 parts by mass of cement (including alumina cement) contained in the mortar. If the amount is less than 0.2 parts by mass, appropriate water retention may not be imparted. On the other hand, if the amount exceeds 0.31 parts by mass, the viscosity increases and the workability deteriorates, which is not appropriate.
本発明の低温用軽量モルタルに使用する凝結調整剤は、モルタルやコンクリートに使用できる凝結調整剤であれば特に限定されず、凝結促進作用があるもの、凝結遅延作用があるもの、又はその両者の何れでも良い。好ましくは両者を併用する。前者(凝結促進作用があるもの)としては、好適にはアルカリ金属塩やアルカリ土類金属塩が挙げられる。塩を構成するアルカリ金属としては、リチウム、ナトリウム、カリウムの何れでも良く、また塩を構成するアルカリ土類金属は、マグネシウム、カルシウム、ストロンチウム、バリウムの何れでも良い。これらアルカリ金属やアルカリ土類金属の塩は、水溶性の塩であれば特に限定されず、無機塩や有機塩の何れであっても良い。望ましくは製造時の扱い易さやモルタルの硬化性への悪影響を回避する上で、飽和水溶液にしたときの20℃でのpHが概ね9〜12となる塩を使用する。より具体的には、リチウム、カリウム、ナトリウムの各炭酸塩、蟻酸ナトリウム、蟻酸カルシウム等を好適に例示することができる。アルカリ金属塩やアルカリ土類金属塩の含有により、セメント(アルミナセメントを含む。)水和反応のピークが時間的に早い時点に移行するよう調整できるため、施工完了から時間が大きく経過しない間であって、発熱による保温作用が残存している間に、モルタル中の水分が殆ど消費されるため、氷点以下になっても凍害等を被り難くなる。アルカリ金属塩やアルカリ土類金属塩の総含有量は、モルタルに含有するセメント(アルミナセメントを含む。)100質量部に対し、2〜3.5質量部が好ましい。2質量部未満では、配合効果が実質得られず、また3.5質量部を超えると、施工作業時間が短くなり過ぎて作業上の制約になることから適当ではない。アルカリ金属塩とアルカリ土類金属塩を併用しても良く、この場合の両者の配合割合は何等制限されない。   The setting modifier used in the low-temperature lightweight mortar of the present invention is not particularly limited as long as it is a setting adjusting agent that can be used in mortar and concrete, and those having a setting promoting action, those having a setting delaying action, or both of them. Either is fine. Preferably both are used together. Preferred examples of the former (which has a setting promoting effect) include alkali metal salts and alkaline earth metal salts. The alkali metal constituting the salt may be any of lithium, sodium and potassium, and the alkaline earth metal constituting the salt may be any of magnesium, calcium, strontium and barium. These alkali metal and alkaline earth metal salts are not particularly limited as long as they are water-soluble salts, and may be either inorganic salts or organic salts. Desirably, a salt having a pH of about 9 to 12 at 20 ° C. when used as a saturated aqueous solution is used in order to avoid the adverse effects on the ease of handling during manufacture and the curability of the mortar. More specifically, lithium, potassium, sodium carbonate, sodium formate, calcium formate and the like can be preferably exemplified. By including alkali metal salt or alkaline earth metal salt, the peak of cement (including alumina cement) hydration reaction can be adjusted to shift to an earlier point in time. In addition, since the water in the mortar is almost consumed while the heat retaining action due to heat generation remains, it is difficult to suffer from frost damage or the like even when the temperature falls below the freezing point. The total content of alkali metal salt and alkaline earth metal salt is preferably 2 to 3.5 parts by mass with respect to 100 parts by mass of cement (including alumina cement) contained in the mortar. If it is less than 2 parts by mass, the blending effect is not substantially obtained, and if it exceeds 3.5 parts by mass, the construction work time becomes too short, which is not suitable. Alkali metal salts and alkaline earth metal salts may be used in combination, and the blending ratio of both in this case is not limited at all.
本発明の低温用軽量モルタルに使用する凝結調整剤の後者(凝結遅延作用があるもの)は、セメントの凝結を遅延できるものなら特に限定されない。具体的には、クエン酸、酒石酸、酒石酸カリウムナトリウム、グルコン酸カルシウム等を例示できる。凝結遅延剤は、アルミナセメントやアルカリ金属塩等によって凝結始発時間が早まるのを防ぎ、施工作業可能な時間を確保することに有用である。凝結遅延剤の含有量は、モルタル中のセメント(アルミナセメントを含む。)100質量部に対し、0.12〜0.35質量部が好ましい。0.12質量部未満では、作業上必要とされる可使時間の確保が困難となる。また0.35質量部を超えると凝結が遅延しすぎて凍害を被り易くなるので適当ではない。   The latter of the setting modifier used in the low-temperature lightweight mortar of the present invention (having a setting delaying action) is not particularly limited as long as it can delay the setting of the cement. Specific examples include citric acid, tartaric acid, potassium sodium tartrate, calcium gluconate and the like. The setting retarder is useful for preventing the setting start time from being shortened by alumina cement, alkali metal salt, or the like, and ensuring a time during which construction work can be performed. The content of the setting retarder is preferably 0.12 to 0.35 parts by mass with respect to 100 parts by mass of cement (including alumina cement) in the mortar. If the amount is less than 0.12 parts by mass, it is difficult to ensure the pot life required for work. On the other hand, if the amount exceeds 0.35 parts by mass, the condensation is delayed so that it is easy to suffer from frost damage.
本発明の低温用軽量モルタルは、普通微粒骨材を含有する。使用する普通微粒骨材は、モルタルやコンクリートに使用できる微粒の普通骨材であれば特に限定されず、好ましくは最大粒径150μm以下の無機系材質からなる普通骨材、より好ましくは100μm以下の無機系材質からなる普通骨材であれば何れのものでも良い。無機系材質は、水に実質不活性なものであれば特に限定されない。材質の具体例示として、珪石、石灰石、寒水石等の粉砕粒、天然砂の分級物、その他岩石の砕石粉等を挙げることができる。また、微粒以外の粒径が大きい普通骨材では、温度が低下するに連れて鏝塗りに関わる作業性が低下し、また低温下で材料分離を起こすことがあるため好ましくない。普通微粒骨材の使用で、材料分離の抑制、塗り施工性の向上及び施工物の緻密化等を促進することができる。普通微粒骨材の使用量は、モルタル中のセメント(アルミナセメントを含む)100質量部に対し、50〜70質量部が好ましい。50質量部未満では所望の作用が実質得られず、また70質量部を超えるとモルタル容重が上がり過ぎて軽量化できないことがあるので適当ではない。   The low-temperature lightweight mortar of the present invention usually contains fine aggregate. The ordinary fine aggregate to be used is not particularly limited as long as it is a fine ordinary aggregate that can be used for mortar and concrete, preferably a normal aggregate made of an inorganic material having a maximum particle size of 150 μm or less, more preferably 100 μm or less. Any ordinary aggregate made of an inorganic material may be used. The inorganic material is not particularly limited as long as it is substantially inert to water. Specific examples of the material include pulverized grains such as quartzite, limestone, and cold water stone, classified natural sand, and other crushed stone rocks. In addition, ordinary aggregates having a large particle size other than fine particles are not preferable because the workability associated with wrinkling decreases as the temperature decreases, and material separation may occur at low temperatures. By using ordinary fine aggregates, it is possible to promote suppression of material separation, improvement of coating workability, densification of work, and the like. The amount of the ordinary fine aggregate is preferably 50 to 70 parts by mass with respect to 100 parts by mass of cement (including alumina cement) in the mortar. If the amount is less than 50 parts by mass, the desired effect cannot be obtained. On the other hand, if it exceeds 70 parts by mass, the weight of the mortar increases so that the weight cannot be reduced.
本発明の低温用軽量モルタルは、アルミナセメント以外のセメントも含有することが好ましい。含有できるセメントは特に制限されないが、例えば、普通、早強、超早強、中庸等、低熱等の各種ポルトランドセメント、高炉セメントやフライアッシュセメントのような各種混合セメント、白色セメントやエコセメントのような特殊セメントを挙げることができる。アルミナセメント以外のセメントも含むことによって、これが結合相形成に貢献し、アルミナセメントが担う結合相形成作用を軽減できるので、アルミナセメントの使用量を抑制できる。アルミナセメント以外のセメントの含有量はアルミナセメント100質量部に対し、230〜600質量部が好ましい。この場合、本モルタル中でのアルミナセメントとアルミナセメント以外のセメントの合計含有量が45〜50質量%となることがより好ましい。アルミナセメント以外のセメント含有量が33質量%未満では前記の効果が得られず、また42質量%を超えると低温での施工使用に支障が生じることがあるので適当ではない。軽量モルタル中でのアルミナセメントとアルミナセメント以外のセメントの合計含有量が45質量%未満では結合成分含有量が低くなり過ぎて強度が低下するので適当ではない。また50質量%を超えると、結合成分含有量が高くなり過ぎて塗り施工作業性が低下する他、収縮が大きくなり易く、ひび割れが発生することがあるので適当ではない。   The low-temperature lightweight mortar of the present invention preferably contains a cement other than alumina cement. The cement that can be contained is not particularly limited. For example, various ordinary portland cements such as normal, early strength, very early strength, intermediate heat, low heat, various mixed cements such as blast furnace cement and fly ash cement, white cement and eco-cement. Special cement. By including a cement other than the alumina cement, this contributes to the formation of the binder phase, and the binder phase forming action of the alumina cement can be reduced, so that the amount of alumina cement used can be suppressed. The content of cement other than alumina cement is preferably 230 to 600 parts by mass with respect to 100 parts by mass of alumina cement. In this case, the total content of the alumina cement and the cement other than the alumina cement in the mortar is more preferably 45 to 50% by mass. If the content of cement other than alumina cement is less than 33% by mass, the above effect cannot be obtained, and if it exceeds 42% by mass, the use at a low temperature may be hindered. If the total content of alumina cement and cement other than alumina cement in the lightweight mortar is less than 45% by mass, the binder component content becomes too low and the strength decreases, which is not suitable. On the other hand, if it exceeds 50% by mass, the content of the binder component becomes excessively high and the coating workability is lowered, shrinkage tends to increase, and cracks may occur.
本発明の低温用軽量モルタルは含水粘土鉱物を含有するのが好ましい。含水粘土鉱物は、一般に粘土中に微粒の鉱物として含まれるもので、カオリン鉱物、雲母粘土鉱物及びスメクタイトの三種類の何れか一種に属する鉱物又は何れか二種以上の層状含水珪酸塩鉱物からなる混合層鉱物であれば良い。好ましくは、吸水・膨潤作用があり、鏝作業性向上作用もあるカオリン鉱物やスメクタイトが良く、より具体的には、カオリナイト、ハロイサイト、デッカイト、ベントナイト、ドロマイト等を例示できる。層状粘土鉱物の含有量は、軽量モルタル中のセメント(後述のアルミナセメントを含む。)100質量部に対し、0.08〜0.14質量部が好ましい。0.08質量部未満では配合効果が実質得られない。また0.14質量部を超えると施工性の低下やひび割れ、浮き、剥離といった現象が起き易くなるので適当ではない。   The low-temperature lightweight mortar of the present invention preferably contains a hydrous clay mineral. Hydrous clay minerals are generally contained in clay as fine-grained minerals, and consist of minerals belonging to any one of the three types of kaolin minerals, mica clay minerals and smectites, or any two or more layered hydrous silicate minerals. Any mixed layer mineral may be used. Preferably, kaolin minerals and smectites that have water absorption / swelling action and dredging workability improving action are preferable, and more specifically, kaolinite, halloysite, dickite, bentonite, dolomite, and the like can be exemplified. The content of the layered clay mineral is preferably 0.08 to 0.14 parts by mass with respect to 100 parts by mass of cement (including alumina cement described later) in the lightweight mortar. If the amount is less than 0.08 parts by mass, the blending effect cannot be obtained. On the other hand, if it exceeds 0.14 parts by mass, it is not appropriate because workability is reduced and cracks, floats, and peeling are likely to occur.
また、本発明の低温用軽量モルタルは、ポリマーディスパージョン又は再乳化粉末樹脂を含むものが好ましい。ポリマーディスパージョン又は再乳化粉末樹脂は、モルタルやコンクリートに使用できるものなら特に限定されない。具体的には、ポリマーディスパージョンとして例えばJIS A 6203に規定されているポリアクリル酸エステル、スチレンブタジエン又はエチレン酢酸ビニルを有効成分とするものが挙げられ、再乳化粉末樹脂として例えばJIS A 6203に規定されているポリアクリル酸エステル、スチレンブタジエン、エチレン酢酸ビニル、酢酸ビニル/バーサチック酸ビニルエステル、酢酸ビニル/バーサチック酸ビニル/アクリル酸エステルを有効成分とするものを挙げることができる。ポリマーディスパージョン又は再乳化粉末樹脂の含有により付着力、曲げ強度、吸水性、ひび割れ抵抗、耐食性等を付与又は向上することができる。このために必要なポリマーディスパージョン又は再乳化粉末樹脂の含有量は、モルタル中のセメント100質量部に対し、固形分換算で0.15〜1.8質量部が好ましい。0.15質量部未満では配合効果が殆ど得らない。また1.8質量部を超えると強度が向上せず、粘性も増大し、施工性が低下するので適当ではない。   Moreover, the low-temperature lightweight mortar of the present invention preferably contains a polymer dispersion or a re-emulsified powder resin. The polymer dispersion or re-emulsified powder resin is not particularly limited as long as it can be used for mortar and concrete. Specific examples of the polymer dispersion include polyacrylic acid esters defined in JIS A 6203, styrene butadiene, or ethylene vinyl acetate as an active ingredient. Examples of re-emulsified powder resins include those defined in JIS A 6203. Examples thereof include polyacrylic acid esters, styrene butadiene, ethylene vinyl acetate, vinyl acetate / vinyl versatate, and vinyl acetate / vinyl versatate / acrylic acid as active ingredients. By including a polymer dispersion or a re-emulsified powder resin, adhesion, bending strength, water absorption, crack resistance, corrosion resistance, and the like can be imparted or improved. For this purpose, the content of the polymer dispersion or re-emulsified powder resin is preferably 0.15 to 1.8 parts by mass in terms of solid content with respect to 100 parts by mass of cement in the mortar. If it is less than 0.15 parts by mass, the blending effect is hardly obtained. On the other hand, when the amount exceeds 1.8 parts by mass, the strength is not improved, the viscosity is increased, and the workability is deteriorated.
また、本発明の低温用軽量モルタルには、本発明の効果を実質喪失させない限り、前記以外の成分を含むものでも良く、このような成分として、例えば、減水剤(高性能減水剤、AE減水剤、高性能AE減水剤、流動化剤、分散剤と称されるものを含む。)、収縮低減剤、消泡剤、膨張材、繊維、撥水剤、白華防止剤、抗菌剤、浄化剤、顔料等を挙げることができるが、ここに表したものに限定されるものではない。   Further, the low-temperature lightweight mortar of the present invention may contain components other than those described above as long as the effects of the present invention are not substantially lost. Examples of such components include water reducing agents (high performance water reducing agents, AE water reducing water). Agents, high-performance AE water reducing agents, fluidizing agents, dispersants, etc.), shrinkage reducing agents, antifoaming agents, expansion materials, fibers, water repellents, anti-whitening agents, antibacterial agents, purification Agents, pigments and the like can be mentioned, but are not limited to those shown here.
また、本発明の低温用軽量モルタルは、低温下での耐久性に優れ、例えば従前の建築用軽量モルタルでは凍害を被る可能性があった概ね零度以下の環境に曝されても何等問題がなく、また防凍剤の類も特に混和させる必要はない。本発明の低温用軽量モルタルは、例えば5℃程度の氷点近い温度でも十分施工可能であり、低温での耐久性に優れる軽量モルタルであるが、例えば常温付近や約30℃以上という比較的高い温度であっても施工性や耐久性に支障を生じることなく使用できる。   In addition, the low-temperature lightweight mortar of the present invention is excellent in durability at low temperatures, for example, there is no problem even if it is exposed to an environment of approximately zero degrees or less, in which a conventional lightweight mortar for building may suffer from frost damage. Further, it is not necessary to add antifreezing agents. The low-temperature lightweight mortar of the present invention is a lightweight mortar that can be sufficiently applied at a temperature near freezing point of, for example, about 5 ° C. and has excellent durability at low temperatures. However, it can be used without causing any trouble in workability and durability.
また、本発明の低温用軽量モルタルの製造方法は特に限定されず、例えば一般的なセメント系のモルタルと概ね同様の方法で製造できる。具体的な一例を示すと、市販のモルタルミキサーに前記のような各使用材料を一括投入し、水を加えて混合する。水の量は特に制限されないが、良好な施工性と高い強度発現性を安定して得るには、本発明のモルタル100質量部に対し、概ね40〜45質量部加えることが推奨される。40質量部未満では、施工可能な可使時間が十分確保できないため適当ではない。また45質量部を超える量では強度低下に加え、施工完了からの強度発現が遅延する傾向が強く、また厚付け性も低下するので適当ではない。   Moreover, the manufacturing method of the low-temperature lightweight mortar of this invention is not specifically limited, For example, it can manufacture with the method substantially the same as general cement-type mortar. As a specific example, each of the materials used is put into a commercially available mortar mixer, and water is added and mixed. The amount of water is not particularly limited, but it is recommended to add approximately 40 to 45 parts by mass with respect to 100 parts by mass of the mortar of the present invention in order to stably obtain good workability and high strength development. If it is less than 40 parts by mass, it is not appropriate because the usable potable time cannot be secured sufficiently. On the other hand, if the amount exceeds 45 parts by mass, the strength development after the completion of construction tends to be delayed in addition to the strength reduction, and the thickness is also not suitable.
また、本発明の低温用軽量モルタルの施工方法は特に限定されるものではないが、鏝やパテ等を使用した塗り付けによる左官施工が好適である。また、建築駆体に吹き付けて施工することも可能である。   Moreover, the construction method of the low-temperature lightweight mortar of the present invention is not particularly limited, but plastering by plastering using scissors or putty is suitable. It is also possible to spray and construct the building body.
以下、実施例により本発明を具体的に詳しく説明するが、本発明はここで表す実施例に限定されるものではない。   EXAMPLES Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited to the examples shown here.
[モルタルの作製] 次に表すA1〜G2から選定される材料と水を、表1に表した配合量となるよう容量100リットルのパン型ミキサに投入し、温度約5℃湿度70%の環境下で約5分間混練し、モルタル(本発明品1〜12、参考品21〜29)を作製した。   [Production of mortar] The material selected from A1 to G2 and water shown below are put into a 100-liter pan mixer so that the blending amount shown in Table 1 is obtained, and the temperature is about 5 ° C and the humidity is 70%. The resulting mixture was kneaded for about 5 minutes to prepare mortars (Invention products 1 to 12, Reference products 21 to 29).
A1;エチレン酢酸ビニル共重合体と発泡状炭酸カルシウムの複合体の細骨材I(最大粒径2mm、平均粒径0.8mm、嵩比重0.11)
A2;エチレン酢酸ビニル共重合体と発泡状炭酸カルシウムの複合体の細骨材II(最大粒径1mm、平均粒径0.6mm、嵩比重0.12)
A3;発泡スチロール(最大粒径2mm、平均粒径0.8mm、嵩比重0.023)
A4;パーライトI(黒曜石発泡体;最大粒径2mm、平均粒径0.8mm、嵩比重0.24)
A5;パーライトII(真珠岩発泡体;最大粒径1.2mm、平均粒径0.6mm、嵩比重0.2)
B1;アルミナセメント(太平洋マテリアル株式会社製)
B2;普通ポルトランドセメント(太平洋セメント株式会社製)
B3;早強ポルトランドセメント(太平洋セメント株式会社製)
C;II型無水石膏(ブレーン比表面積7000cm2/g)
D1;普通微粒骨材(JIS8号砂相当山形珪砂;最大粒径90μm、嵩比重1.3)
D2;普通細骨材(JIS5号砂相当山形珪砂;最大粒径1.2mm、嵩比重1.4)
E1;保水剤(商品名「チローゼMH6002P4」、SEタイロース社製)
E2;炭酸リチウム(市販試薬)
E3;酒石酸カリウムナトリウム(市販試薬)
E4;蟻酸カルシウム(市販試薬)
F1;ベントナイト(粒径90μm以下の粒子含有率70質量%以上、嵩比重0.95)
F2;ナフタレンスルホン酸系減水剤(花王株式会社製)
F3;ビニロン繊維(市販品、繊維長約6mm)
F4;フライアッシュ(JIS A 6201規定のフライアッシュII種相当品)
G1;再乳化粉末樹脂(商品名「LL5055」、旭化成ケミカルズ株式会社製)
G2;ポリマーディスパージョン(商品名「太平洋エフェクト」、太平洋マテリアル株式会社製)
A1: Fine aggregate I of a composite of ethylene vinyl acetate copolymer and foamed calcium carbonate (maximum particle diameter 2 mm, average particle diameter 0.8 mm, bulk specific gravity 0.11)
A2: Fine aggregate II of a composite of ethylene vinyl acetate copolymer and foamed calcium carbonate (maximum particle size 1 mm, average particle size 0.6 mm, bulk specific gravity 0.12)
A3: Styrofoam (maximum particle size 2 mm, average particle size 0.8 mm, bulk specific gravity 0.023)
A4; perlite I (obsidian foam; maximum particle size 2 mm, average particle size 0.8 mm, bulk specific gravity 0.24)
A5; Pearlite II (pearlite foam; maximum particle size 1.2 mm, average particle size 0.6 mm, bulk specific gravity 0.2)
B1; Alumina cement (manufactured by Taiheiyo Material Co., Ltd.)
B2: Normal Portland cement (manufactured by Taiheiyo Cement Co., Ltd.)
B3: Early strong Portland cement (manufactured by Taiheiyo Cement Co., Ltd.)
C; Type II anhydrous gypsum (Brain specific surface area 7000 cm 2 / g)
D1: Ordinary fine aggregate (JIS No. 8 sand-equivalent mountain silica sand; maximum particle size 90 μm, bulk specific gravity 1.3)
D2: Ordinary fine aggregate (JIS No. 5 sand-equivalent mountain silica sand; maximum particle size 1.2 mm, bulk specific gravity 1.4)
E1: Water retention agent (trade name “Tyroze MH6002P4”, manufactured by SE Tylose)
E2: Lithium carbonate (commercially available reagent)
E3: potassium sodium tartrate (commercially available reagent)
E4: Calcium formate (commercially available reagent)
F1; bentonite (particle content of particle size 90 μm or less 70 mass% or more, bulk specific gravity 0.95)
F2: Naphthalenesulfonic acid-based water reducing agent (manufactured by Kao Corporation)
F3: Vinylon fiber (commercial product, fiber length of about 6 mm)
F4: Fly ash (JIS A 6201 regulated fly ash type II equivalent)
G1; re-emulsified powder resin (trade name “LL5055”, manufactured by Asahi Kasei Chemicals Corporation)
G2: Polymer dispersion (trade name “Pacific Effect”, manufactured by Taiheiyo Materials Co., Ltd.)
[コンシステンシーの評価] 作製したモルタルについて、JIS R 5201に準拠した方法で、温度5℃、湿度約70%の屋内で練り上がった直後のモルタルフロー値を測定し、左官施工に適ったコンシステンシーが得られているかの評価指標とした。尚、コンシステンシーは一般に、フロー値が概ね165〜175mmであれば左官施工に適うとされているため、本発明ではこれを判断基準とした。その結果を表2に表す。   [Evaluation of Consistency] For the prepared mortar, the mortar flow value immediately after being kneaded indoors at a temperature of 5 ° C. and a humidity of about 70% was measured by a method in accordance with JIS R 5201, and the consistency suitable for plastering construction. Was used as an evaluation index. In general, the consistency is determined to be suitable for plastering if the flow value is approximately 165 to 175 mm. Therefore, in the present invention, this is used as a criterion. The results are shown in Table 2.
[鏝塗り施工性(左官施工性)の評価] 作製したモルタルについて、温度約5℃、湿度約70%の屋内に、戸建住宅の外壁下地を模擬し、900×1800×12mmの合板2枚を40×50×2000mmの角材3で繋げて固定し、継ぎ目のある1800×1800mmの平板に防水シート、メタルラスをステープルで留め、施工性の確認を行うために下地とした。この1800×1800mmの平板面に対する鏝塗りによる温度5℃での施工性を次の(a)〜(d)の4種の方法で評価した。(a)〜(d)の何れか一の方法による評価でも「不良」と判定されれば、5℃での鏝塗り施工に不適なモルタルと評価した。この評価結果も表2に表す。   [Evaluation of plastering workability (left plastering workability)] The produced mortar simulates the exterior wall base of a detached house indoors at a temperature of about 5 ° C and a humidity of about 70%, and is made of two pieces of 900 x 1800 x 12 mm plywood. Were connected by a square member 3 of 40 × 50 × 2000 mm, fixed to a 1800 × 1800 mm flat plate with a seam, and a waterproof sheet and metal lath were fastened with staples, and used as a base for confirming workability. The workability at a temperature of 5 ° C. by glazing on this 1800 × 1800 mm flat plate surface was evaluated by the following four methods (a) to (d). Even if evaluation by any one of the methods (a) to (d) was judged as “poor”, it was evaluated as mortar unsuitable for 5 ° C. glazing. This evaluation result is also shown in Table 2.
(a)鏝伸び性;設置した平板面に、市販の金鏝で作製したフレッシュ状態のモルタルを塗り付け、塗り斑なくモルタルを広く伸ばし、1800×1800mmの平板面全部に20分以内で塗り付けできたものを鏝伸び性「良好」と判定した。また、これ以外の状況となったものは鏝伸び性「不良」と判定した。   (A) Sprinkle elongation: Apply fresh mortar made with a commercially available metal hammer to the installed flat plate surface, spread the mortar widely without smearing, and apply to all flat plate surfaces of 1800 x 1800 mm within 20 minutes. The resulting product was judged as having good heel elongation. In addition, those that were in other situations were judged as “bad”.
(b)鏝切れ性;塗付け後の金鏝に付着残存するモルタルが実質見られなかったものを鏝切れ性「良好」と判定し、モルタルが付着残存していたものを鏝切れ性「不良」と判定した。   (B) Fracture property: A mortar that does not substantially adhere to and remains on a metal hammer after coating is judged as “good”, and a mortar that adheres and remains is considered to be “bad”. Was determined.
(c)施工物の表面平滑性;金鏝でモルタルを塗り付け、塗り付けたモルタルに数回金鏝を当てて表面を整えることで、概ね平滑な面が得られたものを、施工物の表面平滑性「良好」と判定した。これ以外の状況になったものや金鏝での塗り付け自体が困難であったモルタルは、施工物の表面平滑性「不良」と判定した。   (C) Surface smoothness of the construction; a mortar is applied with a hammer, and the surface is prepared by applying a hammer several times to the applied mortar. The surface smoothness was judged as “good”. Mortars that were in other situations or that were difficult to apply themselves with a hammer were judged to be “poor” on the surface smoothness of the construction.
(d)厚付け性;設置した平板面に、作製したフレッシュ状態のモルタルを約10mm程度の厚さとなるよう鏝で塗付けた。24時間経過後に塗付けられたモルタルの垂れが見られなかったものを、厚付け施工性「良好」と判定し、これ以外の状況になったモルタルは全て厚付け施工性「不良」と判定した。   (D) Thickness: The prepared fresh mortar was applied to the installed flat plate surface with a scissors so as to have a thickness of about 10 mm. After 24 hours, the mortar that had not been dripped was judged to be “good” thickening workability, and all mortars in other situations were judged to be “bad” thickening workability. .
[ひび割れ抵抗性の評価] 前記試験で、平板に塗り付けたモルタルをそのままの状態で温度約5℃、湿度70%の環境下に7日間静置させた。静置後、平板上の施工物の表面を目視で観察し、ひび割れ発生の有無を確認した。ひび割れ発生が全く見られなかったものをひび割れ抵抗性「良好」と判断し、ひび割れ発生が少しでも見られたものをひび割れ抵抗性「不良」と判断した。また同様に、この評価を温度約20℃、湿度60%の環境下に7日間静置させたモルタルに対しても行った。この評価結果も表2に表す。   [Evaluation of Crack Resistance] In the above test, the mortar applied to the flat plate was allowed to stand for 7 days in an environment with a temperature of about 5 ° C. and a humidity of 70%. After standing still, the surface of the construction object on the flat plate was visually observed to check for cracks. Those in which no cracks were observed were judged as “good”, and those in which any cracks were seen were judged as “bad”. Similarly, this evaluation was performed on a mortar that was allowed to stand for 7 days in an environment of a temperature of about 20 ° C. and a humidity of 60%. This evaluation result is also shown in Table 2.
[強度の評価] 作製したモルタルから、JASS 15M−102に準拠した方法で、4×4×16cmの供試体を24時間湿空養生(温度5℃、湿度80%)を行って作製した。材齢1日及び温度約5℃、湿度70%の環境下に放置した材齢28日の供試体に対し、JIS R 5201に準拠した方法によって圧縮強度を測定した。また、同様に、作製したモルタルから、JASS 15M−102に準拠した方法で、4×4×16cmの供試体を24時間湿空養生(温度20℃、湿度60%)を行って作製した。材齢1日及び温度約20℃、湿度60%の環境下に放置した材齢28日の供試体に対しても、JIS R 5201に準拠した方法によって圧縮強度を測定した。この5℃及び20℃で作製したモルタル供試体の圧縮強度評価結果も表2に表す。   [Evaluation of Strength] From the prepared mortar, a 4 × 4 × 16 cm specimen was subjected to moisture curing (temperature 5 ° C., humidity 80%) for 24 hours by a method based on JASS 15M-102. The compressive strength was measured by a method in accordance with JIS R 5201 on a specimen having a material age of 28 days that was allowed to stand in an environment of a material age of 1 day, a temperature of about 5 ° C. and a humidity of 70%. Similarly, a 4 × 4 × 16 cm specimen was prepared from the prepared mortar by wet-curing (temperature 20 ° C., humidity 60%) for 24 hours by a method based on JASS 15M-102. The compressive strength was also measured by a method in accordance with JIS R 5201 even for a specimen having a material age of 28 days that was left in an environment of a material age of 1 day, a temperature of about 20 ° C., and a humidity of 60%. Table 2 also shows the results of compressive strength evaluation of the mortar specimens prepared at 5 ° C and 20 ° C.
表2の結果より、本発明品は低温でも塗り施工に適したコンシステンシーを有すると共に鏝塗り施工性も全般に良好であり、また硬化後も常温は勿論低温でもひび割れも見られず、長期間に渡り耐久性が高い軽量モルタルが得られたことがわかる。これに対し、本発明外の参考品では塗り施工性が不良であるか、良好であっても低温時の強度発現性が本発明品よりも低くなり、低温に曝される施工物としては耐久性に欠けるものであることがわかる。   From the results shown in Table 2, the product of the present invention has a consistency suitable for coating even at low temperatures, and is generally good in lacquering, and after curing, no cracks are seen at room temperature as well as at low temperatures. It can be seen that a lightweight mortar with high durability was obtained. On the other hand, in the reference product outside the present invention, even if the coating workability is poor or good, the strength development at the low temperature is lower than that of the present invention, and it is durable as a construction object exposed to a low temperature. It turns out that it is lacking in nature.

Claims (4)

  1. 軽量細骨材、アルミナセメント、石膏、凝結調整剤、保水剤及び普通微粒骨材を含有してなる低温用軽量モルタル。 Lightweight mortar for low temperatures containing lightweight fine aggregate, alumina cement, gypsum, setting modifier, water retention agent and ordinary fine aggregate.
  2. 普通微粒骨材が最大粒径150μm以下の無機系材質からなる普通骨材である請求項1記載の低温用軽量モルタル。 2. The low-temperature lightweight mortar according to claim 1, wherein the ordinary fine aggregate is a normal aggregate made of an inorganic material having a maximum particle size of 150 [mu] m or less.
  3. さらに、含水粘土鉱物を含有してなる請求項1又は2記載の低温用軽量モルタル。 Furthermore, the lightweight low temperature mortar of Claim 1 or 2 formed by containing a hydrous clay mineral.
  4. さらに、ポリマーディスパージョン又は再乳化粉末樹脂を含有してなる請求項1〜3何れか記載の低温用軽量モルタル。 Furthermore, the light weight mortar for low temperature in any one of Claims 1-3 formed by containing a polymer dispersion or a re-emulsification powder resin.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009155192A (en) * 2007-12-28 2009-07-16 Taiheiyo Materials Corp Lightweight mortar
JP2009227563A (en) * 2008-02-29 2009-10-08 Ube Ind Ltd Hydraulic composition
JP2013108339A (en) * 2011-03-28 2013-06-06 Ube Ind Ltd Method for constructing concrete floor structure, and concrete floor structure
JP2016508947A (en) * 2013-01-18 2016-03-24 エルジー・ハウシス・リミテッドLg Hausys,Ltd. External heat insulation mortar for severe cold season and construction method of external heat insulation system using the same

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60215587A (en) * 1984-04-11 1985-10-28 Kikusui Kagaku Kogyo Kk Mortar composition
JPH04132648A (en) * 1990-09-21 1992-05-06 Denki Kagaku Kogyo Kk Polymer cement mortar composition
JPH04300231A (en) * 1991-03-28 1992-10-23 Denki Kagaku Kogyo Kk Quick-setting polymer cement composition
JPH04317449A (en) * 1991-04-11 1992-11-09 Denki Kagaku Kogyo Kk Setting modifier for hardening accelerator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60215587A (en) * 1984-04-11 1985-10-28 Kikusui Kagaku Kogyo Kk Mortar composition
JPH04132648A (en) * 1990-09-21 1992-05-06 Denki Kagaku Kogyo Kk Polymer cement mortar composition
JPH04300231A (en) * 1991-03-28 1992-10-23 Denki Kagaku Kogyo Kk Quick-setting polymer cement composition
JPH04317449A (en) * 1991-04-11 1992-11-09 Denki Kagaku Kogyo Kk Setting modifier for hardening accelerator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009155192A (en) * 2007-12-28 2009-07-16 Taiheiyo Materials Corp Lightweight mortar
JP2009227563A (en) * 2008-02-29 2009-10-08 Ube Ind Ltd Hydraulic composition
JP2013108339A (en) * 2011-03-28 2013-06-06 Ube Ind Ltd Method for constructing concrete floor structure, and concrete floor structure
JP2016508947A (en) * 2013-01-18 2016-03-24 エルジー・ハウシス・リミテッドLg Hausys,Ltd. External heat insulation mortar for severe cold season and construction method of external heat insulation system using the same

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