JPS63176346A - Cement additive - Google Patents
Cement additiveInfo
- Publication number
- JPS63176346A JPS63176346A JP961587A JP961587A JPS63176346A JP S63176346 A JPS63176346 A JP S63176346A JP 961587 A JP961587 A JP 961587A JP 961587 A JP961587 A JP 961587A JP S63176346 A JPS63176346 A JP S63176346A
- Authority
- JP
- Japan
- Prior art keywords
- cement
- concrete
- polymer
- cement additive
- water
- 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.)
- Pending
Links
- 239000004568 cement Substances 0.000 title claims description 25
- 239000000654 additive Substances 0.000 title claims description 17
- 230000000996 additive effect Effects 0.000 title claims description 11
- 229920000642 polymer Polymers 0.000 claims description 11
- -1 alkali metal salt Chemical class 0.000 claims description 7
- 229910052783 alkali metal Inorganic materials 0.000 claims description 6
- DNIAPMSPPWPWGF-GSVOUGTGSA-N (R)-(-)-Propylene glycol Chemical compound C[C@@H](O)CO DNIAPMSPPWPWGF-GSVOUGTGSA-N 0.000 claims description 4
- 239000000178 monomer Substances 0.000 claims description 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 2
- 125000000962 organic group Chemical group 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims 2
- 239000004567 concrete Substances 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 239000000203 mixture Substances 0.000 description 8
- 238000006386 neutralization reaction Methods 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 229920000058 polyacrylate Polymers 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- KJFMBFZCATUALV-UHFFFAOYSA-N phenolphthalein Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2C(=O)O1 KJFMBFZCATUALV-UHFFFAOYSA-N 0.000 description 2
- 230000000379 polymerizing effect Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000001632 sodium acetate Substances 0.000 description 2
- 235000017281 sodium acetate Nutrition 0.000 description 2
- QDRKDTQENPPHOJ-UHFFFAOYSA-N sodium ethoxide Chemical compound [Na+].CC[O-] QDRKDTQENPPHOJ-UHFFFAOYSA-N 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 125000000753 cycloalkyl group Chemical group 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- ZIYVHBGGAOATLY-UHFFFAOYSA-N methylmalonic acid Chemical compound OC(=O)C(C)C(O)=O ZIYVHBGGAOATLY-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000010526 radical polymerization reaction Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明はセメント添加剤に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to cement additives.
（従来の技術）
一般に、セメントベース、コンクリート、モルタルなど
のセメント配合物は、硬化と乾燥に伴い体積の減少を生
じる。この乾燥収縮は、セメント配合物から形成される
鉄筋を有する建造物の壁。(Prior Art) Generally, cement mixtures such as cement bases, concrete, and mortar undergo volume reduction as they harden and dry. This drying shrinkage affects the walls of buildings with reinforcing bars formed from cement mixtures.
床面、陸橋等のコンクリート構造物、コンクリート製品
等のひびわれの原因となる。It can cause cracks in floors, concrete structures such as overpasses, and concrete products.
このひびわれは、構造物等の強度の低下をもたらし、ひ
びわれ部分から炭酸ガス等を含んだ水や空気が内部に浸
透することにより、コンクリートの中性化を促進し、内
部の鉄筋に錆を発生させ。These cracks cause a decrease in the strength of structures, etc., and water and air containing carbon dioxide gas seep into the interior through the cracks, promoting neutralization of the concrete and causing rust to the internal reinforcing bars. Let me.
構造物等の耐久性を大幅に低下させている。This significantly reduces the durability of structures, etc.
乾燥収縮によるひびわれを防止する方法としては、１）
セメント配合物に加える水の量を低減する。Methods to prevent cracks due to drying shrinkage include 1)
Reduce the amount of water added to the cement mix.
１１）より少量の水でも充分にセメントと水とが混和で
きるようにポリアクリル酸塩からなる添加剤を用いてコ
ンクリート配合物の流動性の向上を計るなどの方法が行
なわれてきたが、セメントの硬化に必要な単位水量を下
げると作業性が著しく損なわれるのみならず硬化発熱量
が増大するため、ひび割れがかえって発生しやすくなる
。またポリアクリル酸塩からなる添加物等を使用した上
で、単位水量を下げると、セメント配合物の流動性は改
良され、ひびわれの発生もいく分食い止められるが、細
かなひびわれからなおも水のコンクリート内部への浸透
を許し、コンクリート構造物等の強度および耐久性の低
下を完全に防ぐに至っていない。11) Methods have been used to improve the fluidity of concrete mixes by using additives made of polyacrylates so that cement and water can be sufficiently mixed with a smaller amount of water. Reducing the unit amount of water required for curing not only significantly impairs workability but also increases the amount of heat generated during curing, making cracks more likely to occur. Furthermore, by using additives such as polyacrylates and lowering the unit water content, the fluidity of the cement mixture is improved and the occurrence of cracks can be prevented to some extent; Penetration into the interior of the concrete is allowed, and the decline in strength and durability of concrete structures, etc., has not been completely prevented.
（発明が解決しようとする問題点）
本発明は、上記の欠点を改善し１強度および耐久性に優
れ九コンクリート構造物等を与えるセメント添加剤を提
供するものである。(Problems to be Solved by the Invention) The present invention provides a cement additive that improves the above-mentioned drawbacks and provides concrete structures with excellent strength and durability.
（問題点を解決するための手段）
本発明は、下記の一般式〔１）で示される繰シ返し単位
を有するポリマに、脂肪族アルコールのアルカリ金属塩
を作用させたポリマか下記の一般式［１〕で示されるモ
ノマに脂肪族アルコールのアルカリ金属塩を作用させて
重合させたポリマを含むセメント添加剤に関する。(Means for Solving the Problems) The present invention provides a polymer having a repeating unit represented by the following general formula [1] on which an alkali metal salt of an aliphatic alcohol is reacted, or a polymer having the following general formula [1]. The present invention relates to a cement additive containing a polymer obtained by polymerizing the monomer represented by [1] with an alkali metal salt of an aliphatic alcohol.
本発明において、上記の一般式〔Ｉ〕で示される繰り返
し単位を有するポリマは、既に公知の化合で表わされ１
式中、ｎは特に制限されないが１通常４〜１００の整数
であり、好ましくは１０〜６０の整数である。またＲ１
およびＲ２は水素原子またはアルキル基、フェニル基、
シクロアルキル基等の有機基であり９通常はＲ＋ ＝Ｈ
、Ｒ１＝ＣＨ３。In the present invention, the polymer having the repeating unit represented by the above general formula [I] is represented by a known compound and 1
In the formula, n is not particularly limited, but is usually an integer of 4 to 100, preferably 10 to 60. Also R1
and R2 is a hydrogen atom, an alkyl group, a phenyl group,
It is an organic group such as a cycloalkyl group, and 9 usually R+ = H
, R1=CH3.
又はＲｔ ＝ Ｒｚ ＝ Ｈとするが特Ｋｌ！ＩＩＪ限
されるものではない。Or, Rt = Rz = H, but special Kl! IIJ is not limited to this.
上記ポリマは例えば１．１−エチレンジカルボン酸ＣＨ
＊＝Ｃ（ＣＯＯＨ）ｚを重合させて得られるポリに過剰
の尿素（ＮＨ２−Ｃ−ＮＨｚ ）を作用させた後六トリ
ウムエトキシド（ＣｚＨｓＯＮａ）で処理して得られる
。The above polymer is, for example, 1,1-ethylenedicarboxylic acid CH
It is obtained by reacting excess urea (NH2-C-NHz) to poly obtained by polymerizing *=C(COOH)z, and then treating it with hexathorium ethoxide (CzHsONa).
父上記のポリマは例えばマロン酸（ＣＨ２（ＣＯＯＨ）
２）１分子と尿素１分子とを反応させた後、ホルムアル
デヒド１分子を反応させて製造されるビニルモノマをナ
トリウムエトキシド等の脂肪族アルコ−Ｉ
ルアルカリ金属塩で処理して同様のアルカリ金属塩とし
た後、適当な条件でラジカル重合させて得ることもでき
る。このポリマの水溶液１１Ｃ１／７ｍａｔ／ｌの酢酸
ナトリウム水溶液を加え、さらに０、１ ｍａＩ！／
ｌの塩酸を加えて水溶液のｐＨを＆０〜９． ＯＫ調節
することが好ましい。本発明のセメント添加剤は使用の
直前に製造されることが好ましい。The above polymer is, for example, malonic acid (CH2(COOH)
2) After reacting one molecule with one molecule of urea, the vinyl monomer produced by reacting one molecule of formaldehyde is treated with an aliphatic alcohol-I alkali metal salt such as sodium ethoxide to form a similar alkali metal salt. After that, it can also be obtained by radical polymerization under appropriate conditions. An aqueous solution of 11C1/7 mat/l of sodium acetate was added to this polymer aqueous solution, and further 0,1 maI! /
1 of hydrochloric acid to adjust the pH of the aqueous solution to &0~9. It is preferable to adjust to OK. Preferably, the cement additives of the invention are manufactured immediately before use.
本発明のセメント添加剤はセメントと水よりなるセメン
トベース、セメント、砂及び水よりなるモルタル、セメ
ント、砂、小石及び水よりなるコンクリートなどのセメ
ント配合物に加えるが、その配合量はセメン）１００重
量部に対して好ましくは０．０１〜４．０重量部、より
好ましくは０．０４〜Ｚ５重量部の範囲とされる。配合
量がこの範囲より少ないときは本発明の改善効果が不充
分となり、またこの範囲よシ多いときは効果はさらに向
上せず不経済である。The cement additive of the present invention is added to cement formulations such as a cement base consisting of cement and water, mortar consisting of cement, sand and water, and concrete consisting of cement, sand, pebbles and water, in an amount of 100 It is preferably in the range of 0.01 to 4.0 parts by weight, more preferably 0.04 to Z5 parts by weight. If the amount is less than this range, the improvement effect of the present invention will be insufficient, and if it is more than this range, the effect will not be further improved and it will be uneconomical.
なお９本発明になる添加剤と共に公知の他の添加剤を併
用しても良い。このような公知の添加剤としては例えば
特開昭６０−５１６４６号公報に示されるポリアクリル
酸塩等が挙げられる。Note that other known additives may be used in combination with the additive of the present invention. Examples of such known additives include polyacrylate salts disclosed in JP-A-60-51646.
本発明になるセメント添加剤を使用してコンクリート構
造物等の劣化を防止する方法としては。A method for preventing deterioration of concrete structures etc. using the cement additive according to the present invention is as follows.
本発明になるセメント添加剤をセメント配合物に配合し
た混合物を既に完成されたコンクリート構造物等の全体
または一部分に塗布しても、または吹き付けても良くあ
るいは上記混合物を型わくに流し込んでコンクリート構
造物等を製造しても良い。いずれの方法によっても強度
と耐久性に優れたコンクリート構造物等を得ることがで
きる。A mixture of the cement additive of the present invention added to a cement mixture may be applied or sprayed to the whole or a part of an already completed concrete structure, or the mixture may be poured into a mold to form a concrete structure. You can also manufacture things. By either method, a concrete structure etc. with excellent strength and durability can be obtained.
（作用）
本発明になるセメント添加剤を用いることによって乾燥
収縮によるひびわれ部分から炭酸ガス等を含む水や空気
が内部に浸透しても緩衝作用が働き、アルカリ性側に規
定したｐＨを保持しコンクリートの中性化が防止でき、
内部の鉄筋に錆が発生することが防止され、コンクリー
ト構造物等の劣化防止と耐久性の向上が計られる。(Function) By using the cement additive of the present invention, even if water or air containing carbon dioxide etc. penetrates into the interior through cracks due to drying shrinkage, a buffering effect will work, maintaining the specified pH on the alkaline side, and making the concrete can prevent the neutralization of
This prevents rust from forming on internal reinforcing bars, preventing deterioration of concrete structures and improving durability.
（実施例） 次に本発明を実施例、比較例により説明する。(Example) Next, the present invention will be explained with reference to Examples and Comparative Examples.
比較例１．実施例１〜３
（１）材料
に）式
で表わされるポリマ数平均分子量２．５００の５０重量
多水溶液の固形分１００重量部に対して尿素１５０重量
部を反応させた後、ナトリウムエトキシド３００重量部
を加え処理して得られるポリマの水溶液に１ ／ ７
ｍｏｌ／ ｌの酢酸ナトリウム水溶液を加え、さらに０
．１ ｍｏｌ／ ｌの塩酸を加えかかる水溶液のｐＨを
９．０に調節したセメント添加剤（第１表に示す割合で
用いた）
（ホ）水
４５０ ｇ（２）試験方法
■ 乾燥収縮試験
（１）の（イ）〜（目を混合してＪＩＳ Ａ １１２９
ｒモルタルおよびコンクリートの長さ変化試験方法
」に準じて行なった。測定は開始後３ケ月、６ケ月の時
点でおこなった。Comparative example 1. Examples 1 to 3 (1) After reacting 150 parts by weight of urea with 100 parts by weight of solid content of a 50 weight polyaqueous solution of a polymer number average molecular weight 2.500 represented by formula (1), 300 parts by weight of sodium ethoxide was added. 1/7 part by weight is added to the aqueous solution of the polymer obtained by treatment.
Add mol/l aqueous sodium acetate solution and further
．． A cement additive prepared by adding 1 mol/l of hydrochloric acid to adjust the pH of the aqueous solution to 9.0 (used in the proportions shown in Table 1) (e) Water
450 g (2) Test method ■ Drying shrinkage test (1) (A) ~ (Mixing the eyes JIS A 1129
The test was conducted in accordance with the ``Length Change Test Method for Mortar and Concrete''. Measurements were taken 3 months and 6 months after the start.
■ 中性化深さ
中性化促進槽（Ｃ０２１１度５チ、温度３０°Ｃ９湿度
６０％ＲＨ）を用いて脱型後材令２週間まで標準養生し
、材令４週間まで温度２０°Ｃ９湿度６（ＩＲＨの恒温
恒室内に保存した１０ｃｍＸ１０ｃ！ＩＩＸ ４０ ａ
ｎの供試体について中性化深さを測定した。供試体切断
しその断面にフェノールフタレインを吹きつけて無着色
の深さく中性化深さ）を測定した。■ Neutralization Depth After demolding, standard curing is performed using a neutralization accelerating tank (C0211 5 degrees, temperature 30°C, humidity 60% RH) until the material is 2 weeks old, and then the temperature is 20°C 9 until the material is 4 weeks old. Humidity 6 (10cm x 10c!IIX 40a stored in a constant temperature room at IRH)
The neutralization depth was measured for the n specimens. A specimen was cut, and phenolphthalein was sprayed onto its cross section to measure the uncolored depth (depth of neutralization).
■ ひびわれの有無
鉄筋入りの４ｃｍＸ４Ｘ９ｃｍの供試体についてひびわ
れの有無を調べた。■ Presence of cracks A 4 cm x 4 x 9 cm specimen with reinforcing bars was examined for the presence of cracks.
■ 吸水比試験
ＪＩＳ Ａ １４０４ Ｉ’−建築用セメント防水剤の
試験方法」に準じ、２４時間後に測定した。■Water absorption ratio test Measured after 24 hours according to JIS A 1404 I'-Test method for cement waterproofing agents for construction.
（３）試験結果
コンクリート製品の調合及び測定結果を第１表に示した
。(3) Test results The mixing and measurement results of the concrete products are shown in Table 1.
以下余白
（発明の効果）
本発明になるセメント添加剤を用いればコンクリート構
造物等の乾燥収縮を充分に押さえ、中性化深さおよび透
水性を低減できる。Below is a margin (effects of the invention) By using the cement additive of the present invention, it is possible to sufficiently suppress drying shrinkage of concrete structures, etc., and reduce the carbonation depth and water permeability.
Claims (1)
するポリマに、脂肪族アルコールのアルカリ金属塩を作
用させたポリマか下記の一般式〔II〕で示されるモノマ
に脂肪族アルコールのアルカリ金属塩を作用させて重合
させたポリマを含むセメント添加剤。 ▲数式、化学式、表等があります▼……〔 I 〕 ▲数式、化学式、表等があります▼……〔II〕 （式においてＲ＿１およびＲ＿２は水素原子または有機
基である）[Claims] 1. A polymer having a repeating unit represented by the following general formula [I] treated with an alkali metal salt of an aliphatic alcohol or a monomer represented by the following general formula [II] A cement additive containing a polymer polymerized by the action of an alkali metal salt of an aliphatic alcohol. ▲There are mathematical formulas, chemical formulas, tables, etc.▼……[I] ▲There are mathematical formulas, chemical formulas, tables, etc.▼……[II] (In the formula, R_1 and R_2 are hydrogen atoms or organic groups)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP961587A JPS63176346A (en) | 1987-01-19 | 1987-01-19 | Cement additive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP961587A JPS63176346A (en) | 1987-01-19 | 1987-01-19 | Cement additive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63176346A true JPS63176346A (en) | 1988-07-20 |
Family
ID=11725195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP961587A Pending JPS63176346A (en) | 1987-01-19 | 1987-01-19 | Cement additive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63176346A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210165323A1 (en) * | 2018-09-07 | 2021-06-03 | Fujifilm Corporation | Actinic ray-sensitive or radiation-sensitive resin composition, resist film, pattern forming method, and method for manufacturing electronic device |
-
1987
- 1987-01-19 JP JP961587A patent/JPS63176346A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210165323A1 (en) * | 2018-09-07 | 2021-06-03 | Fujifilm Corporation | Actinic ray-sensitive or radiation-sensitive resin composition, resist film, pattern forming method, and method for manufacturing electronic device |
| US12001140B2 (en) * | 2018-09-07 | 2024-06-04 | Fujifilm Corporation | Actinic ray-sensitive or radiation-sensitive resin composition, resist film, pattern forming method, and method for manufacturing electronic device |
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