JP2000203915A - Cement mortar composition - Google Patents

Cement mortar composition

Info

Publication number
JP2000203915A
JP2000203915A JP600699A JP600699A JP2000203915A JP 2000203915 A JP2000203915 A JP 2000203915A JP 600699 A JP600699 A JP 600699A JP 600699 A JP600699 A JP 600699A JP 2000203915 A JP2000203915 A JP 2000203915A
Authority
JP
Japan
Prior art keywords
weight
substitution rate
cement mortar
cement
less
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
Application number
JP600699A
Other languages
Japanese (ja)
Other versions
JP4240167B2 (en
Inventor
Takeaki Sasage
剛明 捧
Tsutomu Yamakawa
勉 山川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shin Etsu Chemical Co Ltd
Original Assignee
Shin Etsu Chemical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shin Etsu Chemical Co Ltd filed Critical Shin Etsu Chemical Co Ltd
Priority to JP600699A priority Critical patent/JP4240167B2/en
Publication of JP2000203915A publication Critical patent/JP2000203915A/en
Application granted granted Critical
Publication of JP4240167B2 publication Critical patent/JP4240167B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • C04B40/00Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039Premixtures of ingredients

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

PROBLEM TO BE SOLVED: To obtain a cement mortar composition capable of enhancing work efficiency because it can prolong cement setting retardation time and ensures a long reporting time in tilting than a conventional cement mortar. SOLUTION: The cement mortar composition containing two or more cellulose ethers selected from (i) hydroxypropyl methyl cellulose having 26-31 wt.% substitution rate of methoxyl groups and 3-13 wt.% substitution rate of hydroxypropoxyl groups, (ii) hydroxypropyl methyl cellulose having 18 to <26 wt.% substitution rate of methoxyl groups and 3-13 wt.% substitution rate of hydroxypropoxy groups and (iii) hydroxyethyl methyl cellulose having 19-27 wt.% substitution rate of methoxy groups and 3-16 wt.% substitution rate of hydroxyethoxy groups.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、従来に比べセメン
トモルタル組成物の可使時間をコントロールしやすくす
ることを目的とし、タイル貼り施工時などの目地直し等
を容易とすることで、施工能率をアップすることができ
るセメントモルタル組成物に関する。
BACKGROUND OF THE INVENTION The present invention aims to make it easier to control the pot life of a cement mortar composition than in the past, and to make it easier to repair joints at the time of tile application, etc. The present invention relates to a cement mortar composition that can improve the mortar composition.

【0002】[0002]

【従来の技術及び発明が解決しようとする課題】近年、
工期短縮の要求が高まり、タイルモルタル等において、
一度に大面積のモルタル塗布を行うことが可能なセメン
トモルタル組成物の開発が望まれている。現在、一般に
使用されているセメントモルタル組成物では、一度に大
面積のモルタルを塗布した場合、タイル貼りを行ってい
る最中に、皮張りなどが生じ始め、途中からタイル貼り
付けができなくなるといった欠点があった。また、たと
えタイル貼りを終えたとしても、既にモルタルが締まり
はじめ、その後の目地直し作業に支障をきたすといった
欠点もあった。このような状況下で無理をして作業を行
うと、施工後に接着不良のため剥がれが生じ、建造物の
外観を損ねたり、更にはタイルが落下したりすることに
より、重大な事故につながる場合もある。
2. Description of the Related Art In recent years,
Demand for shortening the construction period has increased,
There is a demand for the development of a cement mortar composition that can apply a large area mortar at a time. At present, in the commonly used cement mortar composition, if a large area mortar is applied at a time, during the tile application, skinning and the like begin to occur, and the tile application cannot be performed in the middle. There were drawbacks. Further, even if the tiles are finished, there is a disadvantage that the mortar already starts to tighten, which hinders subsequent joint repair work. If work is forcibly performed in such a situation, peeling may occur due to poor adhesion after construction, which may damage the appearance of the building or cause the tile to fall, leading to a serious accident. There is also.

【0003】更に、練り置き時間を長くとったセメント
モルタル組成物にも同様なことがいえる。よって、この
ようなことを防止するため、例えば練り置き時間を制限
したり、場合によっては凝結遅延剤を添加し、凝結時間
を遅らせるなどの方法をとる場合がある。
Further, the same can be said for a cement mortar composition having a long kneading time. Therefore, in order to prevent such a situation, for example, a method of limiting the kneading time or, in some cases, adding a setting retarder to delay the setting time may be employed.

【0004】しかし、通常、凝結遅延剤のみの添加で
は、多少の添加量の変動でセメントモルタル組成物の凝
結遅延時間が著しく長くなったりして、期待したほどの
効果が得られなかったりする場合があり、コントロール
が難しい。
[0004] However, usually, when only a setting retarder is added, the setting delay time of the cement mortar composition becomes extremely long due to a slight change in the addition amount, and the expected effect cannot be obtained. There are difficult to control.

【0005】本発明は、かかる従来の欠点を改良するた
めになされたもので、凝結遅延時間がコントロールしや
すいセメントモルタル組成物を提供することを目的とす
る。
[0005] The present invention has been made to improve such a conventional disadvantage, and has as its object to provide a cement mortar composition in which the setting delay time is easily controlled.

【0006】[0006]

【課題を解決するための手段及び発明の実施の形態】本
発明者らは、上記目的を達成するため鋭意検討した結
果、セメントモルタル組成物において、水溶性セルロー
スエーテルとしてヒドロキシプロピルメチルセルロース
のメトキシル基置換率とヒドロキシプロポキシル基置換
率が異なるもの及び/又はヒドロキシエチルメチルセル
ロースのメトキシル基置換率とヒドロキシエトキシル基
置換率が異なるものの群から選ばれる少なくとも2種以
上の水溶性セルロースエーテルを併用することにより、
凝結遅延時間のコントロールが容易となり、タイル施工
時の目地直しのタイミングなどがとりやすくなるため、
施工能率をアップすることができることを知見した。
Means for Solving the Problems and Embodiments of the Invention The present inventors have conducted intensive studies to achieve the above object, and as a result, in a cement mortar composition, a methoxyl group-substituted hydroxypropylmethylcellulose was used as a water-soluble cellulose ether. And / or hydroxypropoxyl group substitution rate and / or hydroxyethyl methylcellulose by using at least two or more water-soluble cellulose ethers selected from the group consisting of different methoxyl group substitution rates and hydroxyethoxyl group substitution rates.
It is easy to control the setting delay time and it is easy to take the timing of joint repair at the time of tile construction,
It was found that construction efficiency could be improved.

【0007】即ち、水溶性セルロースエーテルは、自ず
とセメント凝結遅延効果があるが、置換率を調節するこ
とにより、セメント凝結遅延時間を調節することが可能
である。例えば、65SHタイプのヒドロキシプロピル
メチルセルロース(信越化学工業(株)製)を用いた場
合、メトキシル基の置換率を27〜30重量%、ヒドロ
キシプロポキシル基の置換率を4〜7.5重量%とする
ことにより、セメント凝結遅延時間を30〜60分に調
節することができる。しかし、水溶性セルロースエーテ
ルは、ある特定の置換率であるため、セメント凝結遅延
時間はある特定の時間となってしまい、その時間が経過
すると急激にセメントモルタルが凝結を始めてしまう。
そもそも、セメントが凝結を始めるということは、C3
Sによる発熱が起こることに起因するものであり、ある
発熱量に達するとセメントの硬化が進み、その結果、凝
結が開始することによる。
That is, the water-soluble cellulose ether naturally has a cement setting delay effect, but the cement setting delay time can be adjusted by adjusting the substitution rate. For example, when using 65SH type hydroxypropyl methylcellulose (manufactured by Shin-Etsu Chemical Co., Ltd.), the methoxyl group substitution rate is 27 to 30% by weight, and the hydroxypropoxyl group substitution rate is 4 to 7.5% by weight. By doing so, the cement setting delay time can be adjusted to 30 to 60 minutes. However, since the water-soluble cellulose ether has a specific substitution rate, the cement setting delay time is a specific time, and after that time, the cement mortar rapidly starts to set.
First of all, the fact that the cement starts to condensation is, C 3
This is due to the generation of heat by S. When a certain amount of heat is reached, the cement hardens, and as a result, setting starts.

【0008】これに対し、置換度の異なるセルロースエ
ーテルを併用することにより、つまりセメント凝結遅延
時間の異なる(C3Sによる発熱のタイミングが異な
る)セルロースエーテルを併用することにより、セメン
トモルタルの凝結時間(C3Sによる発熱)が分散され
るため、ある特定時間において急激にセメントモルタル
の凝結が開始することなく、セメントモルタル可使時間
が長時間にわたって確保されることになる。なお、凝結
遅延剤のみを用いると、セメントモルタルの凝結遅延時
間は長くなるものの、1種類のセルロースエーテルを用
いたときと同様に、ある特定時間において急激なセメン
トモルタルの凝結が始まってしまうものであり、本発明
は上記知見に基づいて完成したものである。
On the other hand, the coagulation time of the cement mortar can be improved by using cellulose ethers having different degrees of substitution, that is, using cellulose ethers having different cement setting delay times (different timings of heat generation by C 3 S). Since (heat generation due to C 3 S) is dispersed, the cement mortar can be used for a long time without abruptly setting of the cement mortar at a specific time. In addition, when only the setting retarder is used, the setting delay time of the cement mortar is prolonged, but as in the case of using one type of cellulose ether, rapid setting of the cement mortar starts at a specific time. Thus, the present invention has been completed based on the above findings.

【0009】従って、本発明は、下記(i)〜(ii
i)の中から選ばれる、少なくとも2種類以上のセルロ
ースエーテルを含有するセメントモルタル組成物、及
び、更に凝結遅延剤を含有するセメントモルタル組成物
を提供する。 (i)メトキシル基置換率が26重量%以上31重量%
以下、ヒドロキシプロポキシル基置換率が3重量%以上
13重量%以下のヒドロキシプロピルメチルセルロー
ス、(ii)メトキシル基置換率が18重量%以上26
重量%未満、ヒドロキシプロポキシル基置換率が3重量
%以上13重量%以下のヒドロキシプロピルメチルセル
ロース、(iii)メトキシル基置換率が19重量%以
上27重量%以下、ヒドロキシエトキシル基置換率が3
重量%以上16重量%以下のヒドロキシエチルメチルセ
ルロース。
Accordingly, the present invention provides the following (i) to (ii)
Provided are a cement mortar composition containing at least two or more cellulose ethers selected from i) and a cement mortar composition further containing a setting retarder. (I) The methoxyl group substitution rate is 26% by weight or more and 31% by weight.
Hereinafter, hydroxypropylmethylcellulose having a hydroxypropoxyl group substitution rate of 3% by weight or more and 13% by weight or less, (ii) a methoxyl group substitution rate of 18% by weight or more and 26% by weight or less.
Hydroxypropylmethylcellulose having a hydroxypropoxyl group substitution rate of less than 3% by weight to 13% by weight, (iii) a methoxyl group substitution rate of 19% by weight to 27% by weight, and a hydroxyethoxyl group substitution rate of 3% by weight or less.
Not less than 16% by weight of hydroxyethyl methyl cellulose;

【0010】以下、本発明につき更に詳しく説明する
と、本発明の(i)のヒドロキシプロピルメチルセルロ
ースとしては、メトキシル基置換率が26重量%以上3
1重量%以下、特に27重量%以上30重量%以下、ヒ
ドロキシプロポキシル基置換率が3重量%以上13重量
%以下、特に4.5重量%以上10重量%以下のヒドロ
キシプロピルメチルセルロースが好ましい。
Hereinafter, the present invention will be described in more detail. The hydroxypropylmethylcellulose (i) of the present invention has a methoxyl group substitution ratio of 26% by weight or more and 3% or more.
Hydroxypropyl methylcellulose having 1% by weight or less, particularly 27% by weight or more and 30% by weight or less, and having a hydroxypropoxyl group substitution rate of 3% by weight or more and 13% by weight or less, particularly 4.5% by weight or more and 10% by weight or less is preferable.

【0011】また、本発明の(ii)のヒドロキシプロ
ピルメチルセルロースとしては、メトキシル基置換率が
18重量%以上26重量%未満、特に19重量%以上2
4.5重量%以下、ヒドロキシプロポキシル基置換率が
3重量%以上13重量%以下、特に3重量%以上10重
量%以下のヒドロキシプロピルメチルセルロースが好ま
しい。
The hydroxypropylmethylcellulose (ii) of the present invention has a methoxyl group substitution ratio of 18% by weight or more and less than 26% by weight, particularly 19% by weight or more and 2% by weight or less.
Hydroxypropyl methylcellulose having 4.5% by weight or less and a hydroxypropoxyl group substitution ratio of 3% by weight or more and 13% by weight or less, particularly 3% by weight or more and 10% by weight or less is preferred.

【0012】更に、本発明の(iii)のヒドロキシエ
チルメチルセルロースとしては、メトキシル基置換率が
19重量%以上27重量%以下、特に21重量%以上2
5重量%以下、ヒドロキシエトキシル基置換率が3重量
%以上16重量%以下、特に3.5重量%以上12重量
%以下のヒドロキシエチルメチルセルロースが好まし
い。
Further, the hydroxyethylmethylcellulose (iii) of the present invention has a methoxyl group substitution ratio of 19% by weight or more and 27% by weight or less, particularly 21% by weight or more and 2% by weight or less.
Hydroxyethyl methylcellulose having 5% by weight or less and a hydroxyethoxyl group substitution rate of 3% by weight or more and 16% by weight or less, particularly 3.5% by weight or more and 12% by weight or less is preferable.

【0013】上記セルロースエーテルの粘度は、1重量
%において100〜22000mPa・s、特に200
〜18000mPa・sのものが通常使用される。粘度
が100mPa・s未満のものは、通常使用範囲におい
て保水率が乏しいためである。多量に使用すれば、保水
率は改善されるが、セルロースエーテルによって巻き込
まれる空気量が多くなってしまうため、セメントモルタ
ルの硬化後の強度が弱くなったりするおそれがある。ま
た、添加量自体が多いため、コスト高になる。また、逆
に粘度が22000mPa・sを超える場合は、セメン
トモルタルに対する添加量が極微少量となり、セメント
に対する凝結遅延効果が充分得られない場合がある。ま
た、これ以上の粘度のものを得ようとした場合、生産工
程が著しく延びるか、コストが非常に高くなる。
The above-mentioned cellulose ether has a viscosity of 100 to 22,000 mPa · s at 1% by weight, especially 200
〜18000 mPa · s is usually used. If the viscosity is less than 100 mPa · s, the water retention is usually poor in the range of use. If used in a large amount, the water retention rate is improved, but the amount of air entrained by the cellulose ether increases, and the strength of the cement mortar after curing may be reduced. In addition, since the amount of addition itself is large, the cost increases. On the other hand, when the viscosity exceeds 22000 mPa · s, the addition amount to the cement mortar becomes extremely small, and the effect of retarding the setting of the cement may not be sufficiently obtained. Further, when an attempt is made to obtain a material having a higher viscosity, the production process is significantly extended or the cost becomes extremely high.

【0014】上記(i),(ii),(iii)の水溶
性セルロースエーテルの配合割合は適宜選定されるが、
これらの2者を併用する場合、その割合は(i):(i
i),(i):(iii),(ii):(iii)の重
量比として、好ましくは1:99〜99:1、より好ま
しくは10:90〜90:10、更に好ましくは30:
70〜70:30の範囲である。また上記3者を併用す
る場合も、これに準じて選定することができる。
The mixing ratio of the water-soluble cellulose ethers (i), (ii) and (iii) is appropriately selected.
When these two are used together, the ratio is (i) :( i
The weight ratio of i), (i): (iii), (ii): (iii) is preferably 1:99 to 99: 1, more preferably 10:90 to 90:10, and further preferably 30:
The range is 70 to 70:30. When the above three are used together, the selection can be made in accordance with the above.

【0015】上記水溶性セルロースエーテルの合計配合
量は適宜選定されるが、通常、セメントに対し0.1〜
1.0重量%、好ましくは0.1〜0.5重量%であ
る。
The total amount of the above-mentioned water-soluble cellulose ethers is appropriately selected, but is usually 0.1 to 10% based on the cement.
It is 1.0% by weight, preferably 0.1 to 0.5% by weight.

【0016】本発明においては、必要により凝結遅延剤
を更に併用し得る。本発明で用いる凝結遅延剤として
は、ピロガロール等のヒドロキシベンゼン、没食子酸等
のフェノール酸、ピルビン酸、マロン酸、グルタル酸等
のカルボン酸、オキシマロン酸、クエン酸、酒石酸、グ
ルコン酸等のオキシカルボン酸、アミノカルボン酸、こ
れらカルボン酸、オキシカルボン酸、アミノカルボン酸
のナトリウム塩やカルシウム塩などの塩、ケイフッ化マ
グネシウム等のケイフッ化物、リン酸塩、ホウ酸塩等が
挙げられる。
In the present invention, a setting retarder may be further used if necessary. Examples of the setting retarder used in the present invention include hydroxybenzene such as pyrogallol, phenolic acid such as gallic acid, pyruvic acid, malonic acid, carboxylic acid such as glutaric acid, oxymalonic acid, citric acid, tartaric acid, and oxyacid such as gluconic acid. Examples thereof include carboxylic acids, aminocarboxylic acids, salts of these carboxylic acids, oxycarboxylic acids, aminocarboxylic acids such as sodium salts and calcium salts, silicides such as magnesium silicofluoride, phosphates and borates.

【0017】凝結遅延剤の添加量は、通常セメントの5
重量%以下、好ましくは0.01〜3重量%であるが、
所望の可使時間となるように添加量を定めることができ
る。凝結遅延剤の添加量が多すぎると、凝結遅延時間が
長くなりすぎるため、硬化時間が遅くなり、次の工程を
阻害する結果となるおそれが生じる。
The amount of setting retarder added is usually 5
% By weight or less, preferably 0.01 to 3% by weight,
The addition amount can be determined so as to obtain a desired pot life. If the addition amount of the setting retarder is too large, the setting delay time becomes too long, so that the curing time becomes longer, which may result in the inhibition of the next step.

【0018】本発明のセメントモルタル組成物は、公知
のセメントモルタル組成物と同様に、セメント及び骨材
を含有する。本発明に用いるセメントとしては、普通ポ
ルトランドセメント、及びフライアッシュセメント、ア
ルミナセメント等の水硬性セメントなどがある。また、
カラーセメントなどを使用しても差し支えない。その
他、場合によっては、半水石膏、消石灰、炭酸カルシウ
ム、ドロマイトプラスター、粘土等を併用することも可
能である。一方、骨材としては、川砂、山砂、砕砂、珪
砂、寒水砂、軽量骨材(例えばパーライト)等が使用さ
れる。その他必要に応じてエマルジョン、繊維物質等を
配合しても差し支えない。
[0018] The cement mortar composition of the present invention contains cement and aggregate similarly to known cement mortar compositions. Examples of the cement used in the present invention include ordinary portland cement and hydraulic cement such as fly ash cement and alumina cement. Also,
Color cement can be used. In addition, in some cases, hemihydrate gypsum, slaked lime, calcium carbonate, dolomite plaster, clay and the like can be used in combination. On the other hand, as the aggregate, river sand, mountain sand, crushed sand, quartz sand, cold water sand, lightweight aggregate (for example, perlite) and the like are used. In addition, if necessary, an emulsion, a fiber substance, or the like may be blended.

【0019】なお、骨材の配合量は、通常の配合量でよ
いが、セメントに対し30〜300重量%とすることが
できる。
The amount of the aggregate may be a usual amount, but may be 30 to 300% by weight based on the cement.

【0020】更に、本発明のセメントモルタル組成物
は、水を添加して常法により混練、施工するが、水の添
加量は、通常必要とされるワーカビリティーが得られる
ように添加する。
Further, the cement mortar composition of the present invention is kneaded and worked by a conventional method with the addition of water, and the amount of water is added so as to obtain the generally required workability.

【0021】[0021]

【実施例】以下、実施例と比較例を示し、本発明を具体
的に説明するが、本発明は下記の実施例に制限されるも
のではない。
EXAMPLES The present invention will be described below in detail with reference to examples and comparative examples, but the present invention is not limited to the following examples.

【0022】〔実施例,比較例〕下記の材料を表1,2
に示した調合で5Lモルタルミキサーにより混練した。
混練時間は、水以外の材料をブレンドするための空練り
時間を1分、注水後3分とした。セメントモルタル混練
後、直ちにテーブルフロー、タイル接着による目地直し
可能時間(可使時間)の測定を行った。結果を表1,2
に併記する。
[Examples and Comparative Examples]
And kneaded with a 5 L mortar mixer.
The kneading time was 1 minute for the empty kneading time for blending materials other than water, and 3 minutes after water injection. Immediately after kneading the cement mortar, the table flow and the possible joint repair time (pot life) by tile adhesion were measured. The results are shown in Tables 1 and 2.
It is described together.

【0023】各測定方法を以下に示す。 (1)テーブルフロー:JIS R 5201に準じ
た。 (2)タイル接着目地直し可能時間:混練後のセメント
モルタルをシーラー処理したコンクリート板に厚み5m
mで塗布し、直ちに陶器製の小口平タイルを貼り付け、
5分おきにタイルを僅かにずらし、タイルの移動が可能
かどうか確認した。タイルをずらしたときに剥げ落ちた
時間を最大可使時間とした。 (3)保水率:住宅都市整備公団、タイルモルタル試験
法(化学濾紙法)に準じた。測定は60分後とした。 (4)凝結遅延時間:双子型伝導微小熱量計にて測定し
たC3Sによる最大発熱ピーク時間が162分のプレー
ン値のセメントを、JIS R 5201のセメントの
凝結試験法に従って測定した凝結始発と終結の平均値に
換算した値を基準とした。各セルロースエーテルの凝結
遅延時間は、セメントに対し0.2重量%加えたものを
同様に測定し、プレーンのセメントの凝結時間との差を
示した。
Each measurement method is described below. (1) Table flow: According to JIS R5201. (2) Tiled joint repair time: 5 m thick concrete plate after kneading cement mortar with sealer
m, immediately paste a small ceramic tile tile,
Every 5 minutes, the tile was slightly shifted, and it was checked whether the tile could be moved. The time when the tile was peeled off when it was shifted was taken as the maximum pot life. (3) Water retention: Residential City Development Corporation, according to the tile mortar test method (chemical filter paper method). The measurement was made after 60 minutes. (4) Setting delay time: A cement having a plain value of 162 minutes as the maximum heat generation peak time due to C 3 S measured by a twin conduction microcalorimeter was determined as the initial setting measured by the cement setting test method of JIS R5201. The value converted to the average value of the termination was used as a reference. The setting delay time of each cellulose ether was similarly measured by adding 0.2% by weight to the cement, and showed a difference from the setting time of the plain cement.

【0024】使用材料 (1)65SH−4000:信越化学工業製、商品名、
ヒドロキシプロピルメチルセルロース、1%粘度267
mPa・s(BL型粘度計)、凝結遅延時間46分(置
換率メトキシル基28.2重量%、ヒドロキシプロポキ
シル基5.5重量%) (2)90SH−4000:信越化学工業製、商品名、
ヒドロキシプロピルメチルセルロース、1%粘度273
mPa・s(BL型粘度計)、凝結遅延時間90分(置
換率メトキシル基23.1重量%、ヒドロキシプロポキ
シル基7.3重量%) (3)SEB−04T:信越化学工業製、商品名、ヒド
ロキシエチルメチルセルロース、1%粘度260mPa
・s(BL型粘度計)、凝結遅延時間110分(置換率
メトキシル基23.2重量%、ヒドロキシエトキシル基
5.9重量%) (4)セメント:日本セメント製、普通ポルトランドセ
メント(表中、OPCと略す) (5)珪砂:三河珪砂5号(表中、Sと略す)(6)凝
結遅延剤: グルコン酸ナトリウム(表中、SGと略す)
Materials used (1) 65SH-4000: manufactured by Shin-Etsu Chemical Co., Ltd.
Hydroxypropyl methylcellulose, 1% viscosity 267
mPa · s (BL type viscometer), setting delay time 46 minutes (substitution ratio methoxyl group 28.2% by weight, hydroxypropoxyl group 5.5% by weight) (2) 90SH-4000: manufactured by Shin-Etsu Chemical Co., Ltd. ,
Hydroxypropyl methylcellulose, 1% viscosity 273
mPa · s (BL type viscometer), setting delay time 90 minutes (substitution ratio methoxyl group 23.1% by weight, hydroxypropoxyl group 7.3% by weight) (3) SEB-04T: manufactured by Shin-Etsu Chemical Co., Ltd. , Hydroxyethyl methylcellulose, 1% viscosity 260 mPa
S (BL type viscometer), setting delay time 110 minutes (substitution ratio methoxyl group 23.2% by weight, hydroxyethoxyl group 5.9% by weight) (4) Cement: Nippon Cement, ordinary Portland cement (in the table, (5) Silica sand: Mikawa silica sand No. 5 (abbreviated as S in the table) (6) Setting retarder: sodium gluconate (abbreviated as SG in the table)

【0025】[0025]

【表1】 [Table 1]

【0026】[0026]

【表2】 [Table 2]

【0027】[0027]

【発明の効果】本発明のセメントモルタル組成物を使用
することにより、従来のセメントモルタル組成物よりも
セメント凝結遅延時間を長くすることができ、タイル施
工時の目地直し時間などが長くとれるため、作業効率を
高めることが可能となる。
By using the cement mortar composition of the present invention, the cement setting delay time can be made longer than that of the conventional cement mortar composition, and the joint repair time at the time of tile construction can be made longer. Work efficiency can be improved.

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 FI テーマコート゛(参考) C04B 24:38 14:06 24:06) 103:22 111:00 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C04B 24:38 14:06 24:06) 103: 22 111: 00

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 下記(i)〜(iii)の中から選ばれ
る、少なくとも2種類以上のセルロースエーテルを含有
するセメントモルタル組成物。 (i)メトキシル基置換率が26重量%以上31重量%
以下、ヒドロキシプロポキシル基置換率が3重量%以上
13重量%以下のヒドロキシプロピルメチルセルロー
ス、(ii)メトキシル基置換率が18重量%以上26
重量%未満、ヒドロキシプロポキシル基置換率が3重量
%以上13重量%以下のヒドロキシプロピルメチルセル
ロース、(iii)メトキシル基置換率が19重量%以
上27重量%以下、ヒドロキシエトキシル基置換率が3
重量%以上16重量%以下のヒドロキシエチルメチルセ
ルロース。
1. A cement mortar composition containing at least two or more cellulose ethers selected from the following (i) to (iii). (I) The methoxyl group substitution rate is 26% by weight or more and 31% by weight.
Hereinafter, hydroxypropylmethylcellulose having a hydroxypropoxyl group substitution rate of 3% by weight or more and 13% by weight or less, (ii) a methoxyl group substitution rate of 18% by weight or more and 26% by weight or less.
Hydroxypropylmethylcellulose having a hydroxypropoxyl group substitution rate of less than 3% by weight to 13% by weight, (iii) a methoxyl group substitution rate of 19% by weight to 27% by weight, and a hydroxyethoxyl group substitution rate of 3% by weight or less.
Not less than 16% by weight of hydroxyethyl methyl cellulose;
【請求項2】 更に、凝結遅延剤を含有する請求項1記
載のセメントモルタル組成物。
2. The cement mortar composition according to claim 1, further comprising a setting retarder.
JP600699A 1999-01-13 1999-01-13 Cement mortar composition and method for controlling pot life Expired - Fee Related JP4240167B2 (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003048070A1 (en) * 2001-12-03 2003-06-12 Akzo Nobel Nv Aqueous cement composition
EP1964826A2 (en) 2007-02-19 2008-09-03 Shin-Etsu Chemical Co., Ltd. Hydraulic compositions, their preparation and use
EP2418185A2 (en) * 2009-03-12 2012-02-15 Samsung Fine Chemicals Co., Ltd. Crack-resistant admixture for cement mortar, and cement mortar comprising same
JP2014101243A (en) * 2012-11-19 2014-06-05 Kajima Corp Cement composition
JP2015094174A (en) * 2013-11-13 2015-05-18 株式会社錢高組 Detection device detecting filling situation of fluid and hollow tube equipped with the same
JP2015227284A (en) * 2015-07-22 2015-12-17 住友大阪セメント株式会社 Filler and post-process anchor construction method

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003048070A1 (en) * 2001-12-03 2003-06-12 Akzo Nobel Nv Aqueous cement composition
CN100453494C (en) * 2001-12-03 2009-01-21 阿克佐诺贝尔公司 Aqueous cement composition
EP1964826A2 (en) 2007-02-19 2008-09-03 Shin-Etsu Chemical Co., Ltd. Hydraulic compositions, their preparation and use
US7588635B2 (en) 2007-02-19 2009-09-15 Shin-Etsu Chemical Co., Ltd. Hydraulic composition
EP1964826B1 (en) 2007-02-19 2018-11-07 Shin-Etsu Chemical Co., Ltd. Self-levelling, hydraulic compositions and use thereof
EP2418185A2 (en) * 2009-03-12 2012-02-15 Samsung Fine Chemicals Co., Ltd. Crack-resistant admixture for cement mortar, and cement mortar comprising same
EP2418185A4 (en) * 2009-03-12 2013-09-11 Samsung Fine Chemicals Co Ltd Crack-resistant admixture for cement mortar, and cement mortar comprising same
JP2014101243A (en) * 2012-11-19 2014-06-05 Kajima Corp Cement composition
JP2015094174A (en) * 2013-11-13 2015-05-18 株式会社錢高組 Detection device detecting filling situation of fluid and hollow tube equipped with the same
JP2015227284A (en) * 2015-07-22 2015-12-17 住友大阪セメント株式会社 Filler and post-process anchor construction method

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