JPH02307849A - Shrinkage reducer for cement - Google Patents
Shrinkage reducer for cementInfo
- Publication number
- JPH02307849A JPH02307849A JP1129578A JP12957889A JPH02307849A JP H02307849 A JPH02307849 A JP H02307849A JP 1129578 A JP1129578 A JP 1129578A JP 12957889 A JP12957889 A JP 12957889A JP H02307849 A JPH02307849 A JP H02307849A
- Authority
- JP
- Japan
- Prior art keywords
- cement
- shrinkage
- reducing agent
- drying
- added
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004568 cement Substances 0.000 title claims abstract description 28
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 23
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 125000000753 cycloalkyl group Chemical group 0.000 claims abstract description 4
- 125000004432 carbon atom Chemical group C* 0.000 claims description 7
- 238000001035 drying Methods 0.000 abstract description 9
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 abstract description 6
- 230000001603 reducing effect Effects 0.000 abstract description 4
- 150000001298 alcohols Chemical class 0.000 abstract description 3
- 239000011083 cement mortar Substances 0.000 abstract description 2
- XCIXKGXIYUWCLL-UHFFFAOYSA-N cyclopentanol Chemical compound OC1CCCC1 XCIXKGXIYUWCLL-UHFFFAOYSA-N 0.000 abstract description 2
- 238000005336 cracking Methods 0.000 abstract 1
- 238000001723 curing Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000011398 Portland cement Substances 0.000 description 4
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- -1 1so-pentyl group Chemical group 0.000 description 2
- MSXVEPNJUHWQHW-UHFFFAOYSA-N 2-methylbutan-2-ol Chemical compound CCC(C)(C)O MSXVEPNJUHWQHW-UHFFFAOYSA-N 0.000 description 2
- AMQJEAYHLZJPGS-UHFFFAOYSA-N N-Pentanol Chemical compound CCCCCO AMQJEAYHLZJPGS-UHFFFAOYSA-N 0.000 description 2
- 125000002947 alkylene group Chemical group 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- ZSIAUFGUXNUGDI-UHFFFAOYSA-N hexan-1-ol Chemical compound CCCCCCO ZSIAUFGUXNUGDI-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 150000005215 alkyl ethers Chemical class 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- HPXRVTGHNJAIIH-UHFFFAOYSA-N cyclohexanol Chemical compound OC1CCCCC1 HPXRVTGHNJAIIH-UHFFFAOYSA-N 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001280 n-hexyl group Chemical group C(CCCCC)* 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 125000001973 tert-pentyl group Chemical group [H]C([H])([H])C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/02—Alcohols; Phenols; Ethers
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/56—Opacifiers
- C04B2103/58—Shrinkage reducing agents
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
Description
【発明の詳細な説明】 ［産業上の利用分野コ 本発明はセメント用収縮低減剤に関する。[Detailed description of the invention] [Industrial application fields] The present invention relates to a shrinkage reducing agent for cement.
［従来の技術］
従来、セメント・モルタルおよびコンクリート（以下「
セメント組成物」と称する。）の重大な欠点の１つとし
て乾燥ひび割れが発生しやすいことがあり、それはセメ
ントの乾燥収縮の大きいことに起因している。[Conventional technology] Conventionally, cement mortar and concrete (hereinafter "
"Cement composition". ) is prone to drying cracks, which is due to the large drying shrinkage of the cement.
そのため従来からセメント組成物の乾燥収縮を低減する
低減剤について種々提案され、たとえばアルコールのア
ルキレンオキシド付加物やアルキルフェノールのアルキ
レンオキシド付加物が知られている（例えば特開昭５６
−３７２５９号公報および特公昭８２−１０９４７号公
報）。Therefore, various reducing agents have been proposed to reduce the drying shrinkage of cement compositions. For example, alkylene oxide adducts of alcohol and alkylene oxide adducts of alkylphenol are known (for example, JP-A-56
-37259 and Japanese Patent Publication No. 82-10947).
［発明が解決しようとする課題］
しかしながら、従来の乾燥収縮低減剤をセメント組成物
に添加した場合、少ない添加量では充分効果がでなかっ
た。[Problems to be Solved by the Invention] However, when a conventional drying shrinkage reducing agent was added to a cement composition, a sufficient effect was not obtained even if the amount added was small.
［課題を解決するための手段］
本発明者らは少ない添加量でも収縮低減効果の得られる
収縮・低減剤について鋭意検討した結果、本発明に到達
した。[Means for Solving the Problems] The present inventors have intensively studied a shrinkage/reducing agent that can provide a shrinkage reducing effect even when added in a small amount, and as a result, have arrived at the present invention.
すなわち本発明は、一般式（１）
％式％（１）
（式中、Ｒは炭素数４〜６のアルキル基または炭素数６
〜６のシクロアルキル基である。）で示されるアルコー
ルの１皿または２皿以上の混合物からな−るセメント用
収縮低減剤である。That is, the present invention is based on the general formula (1) % formula % (1) (wherein R is an alkyl group having 4 to 6 carbon atoms or 6 carbon atoms
-6 cycloalkyl group. ) is a shrinkage reducing agent for cement consisting of one or a mixture of two or more alcohols.
一般式（１）において、Ｒの炭素数４〜６のアルキル基
としては、ｎ−ブチル基、 １．ｓｏ−ブチル基、ｔ
ｅｒｔ−ブチル基、ｎ−ペンチル基、１ｓｏ−ペンチル
基、ｔｅｒｔ−ペンチル基、ｎ−ヘキシル基、１ｓｏ−
ヘキシル基などが、炭素数５〜６のシクロアルキル基と
しては、シクロペンチル基、シクロヘキシル基などがあ
げられる。これらのうち好ましいのはブチル基である。In general formula (1), the alkyl group having 4 to 6 carbon atoms for R is an n-butyl group, 1. so-butyl group, t
ert-butyl group, n-pentyl group, 1so-pentyl group, tert-pentyl group, n-hexyl group, 1so-
Examples of the cycloalkyl group having 5 to 6 carbon atoms include a hexyl group, a cyclopentyl group, a cyclohexyl group, and the like. Among these, butyl group is preferred.
上記一般式（１）で示されるアルコールとしては、たと
えば、ｎ−ブチルアルコール、１ｓｏ−ブチルアルコー
ル、ｔｅｒｔ−ブチルアルコール、ｎ−ペンチルアルコ
ール、ｌ５Ｏ−ペンチルアルコール、ｔｅｒｔ−ペンチ
ルアルコール、ｎ−ヘキシルアルコール、１ｓｏ−ヘキ
シルアルコール、シクロペンチルアルコール、シクロヘ
キシルアルコールなどがあげられる。Examples of the alcohol represented by the above general formula (1) include n-butyl alcohol, 1so-butyl alcohol, tert-butyl alcohol, n-pentyl alcohol, 15O-pentyl alcohol, tert-pentyl alcohol, n-hexyl alcohol, Examples include 1so-hexyl alcohol, cyclopentyl alcohol, and cyclohexyl alcohol.
本発明の収縮低減剤の使用できるセメントとしては、普
通ポルトランドセメント、特殊ポルトランドセメント（
早強ポルトランドセメント、中庸熱ポルトランドセメン
ト）、アルミナセメント、高炉セメント、フライアッシ
ュセメントなどかあげられ、セメントの柾類の影響を受
けない。さらに、骨材の種類、併用する混和剤および混
和材料の制約を受けない。すなわちコンクリート用減水
剤、空気連行剤、膨張材、本発明以外の収縮低減剤、そ
の他公知のモルタルまたはコンクリート用混和材料と併
用することもできる。Cement that can be used with the shrinkage reducing agent of the present invention include ordinary Portland cement, special Portland cement (
These include early-strength Portland cement, medium-heat Portland cement), alumina cement, blast furnace cement, and fly ash cement, and are not affected by cement types. Furthermore, there are no restrictions on the type of aggregate, admixtures used together, and admixture materials. That is, it can also be used in combination with a water reducing agent for concrete, an air entraining agent, an expanding agent, a shrinkage reducing agent other than the present invention, and other known mortar or admixtures for concrete.
本発明の収縮低減剤の使用量は、一般式（１）で示され
る化合物のアルキル基の炭素数によっても異なるが、セ
メントに対して通常０．５〜１０ｆｆｉ量％である。使
用量が０．５ｍｍ％未構では収縮低減効果は少なく、一
方１０ｆｆｉ：ｆｆｉ％を越えるとセメント組成物の強
度が無添加のものと比較して約２７３以下となり実用性
において充分でない。The amount of the shrinkage reducing agent of the present invention to be used varies depending on the number of carbon atoms in the alkyl group of the compound represented by the general formula (1), but is usually 0.5 to 10% by weight based on the cement. If the amount used is less than 0.5 mm%, the effect of reducing shrinkage will be small, while if it exceeds 10 ffi:ffi%, the strength of the cement composition will be about 273 or less compared to that without additives, which is not sufficient for practical use.
本発明のセメント用収縮低減剤の添加手段は、普通一般
に行われているセメント混和剤の場合と同じように使用
できる。たとえば混練水に予め適量のセメント用収縮低
減剤を混和してもよいし、一度練り上がったコンクリー
ト等に添加しても良い。さらに、硬化したセメント製品
の表層部に浸透させてもよい。The means for adding the shrinkage reducing agent for cement according to the present invention can be used in the same manner as in the case of conventional cement admixtures. For example, an appropriate amount of a shrinkage reducing agent for cement may be mixed in advance with the mixing water, or it may be added to concrete once mixed. Furthermore, it may be allowed to penetrate into the surface layer of a hardened cement product.
本発明の収縮低減剤を添加したコンクリートなどの施工
法は従来の場合と同じでよく、コテ塗り１、型枠への充
填、吹き付は塗り、コーキングガンによる注入などの方
法をとりつる。また、硬化ないし養生法としては気乾養
生、湿空養生、水中養生、加熱促進養生（蒸気養生、オ
ートクレーブ養生など）のいずれでもよく、また各々の
併用でもよい。The method of constructing concrete and the like to which the shrinkage reducing agent of the present invention has been added may be the same as in the conventional case, and includes methods such as troweling 1, filling the formwork, spraying and pouring, and pouring with a caulking gun. The curing or curing method may be air dry curing, humid air curing, water curing, heating accelerated curing (steam curing, autoclave curing, etc.), or a combination of each may be used.
また各場合の条件も従来と同様でよい。Further, the conditions in each case may be the same as in the conventional case.
［実施例コ
以下、実施例により本発明を説明するが、本発明はこれ
に限定されるものではない。[Example] The present invention will be explained below with reference to Examples, but the present invention is not limited thereto.
実施例１〜５、比較例１ 本発明の収縮低減剤（実施例１〜５）を表１に示す。Examples 1 to 5, Comparative Example 1 The shrinkage reducing agents (Examples 1 to 5) of the present invention are shown in Table 1.
（１）各皿の本発明の収縮低減剤を、それぞれセメント
に対して２ｍｍ％添加したものおよび添加しないものに
ついて、ＪＩＳ Ａ１１２９のダイアルゲージ法にて
収縮試験を、ＪＩＳＡ１１１６により空気連行量を、Ｊ
ＩＳ Ｒ５２０１により強度を測定し表−１に示す結
果を得た。(1) For each plate with and without 2 mm% of the shrinkage reducing agent of the present invention added to the cement, a shrinkage test was conducted using the dial gauge method of JIS A1129, and the amount of air entrainment was measured using JIS A1116.
The strength was measured according to IS R5201 and the results shown in Table 1 were obtained.
なお、水／セメント比は６５％、砂／セメント比は２０
０％である。砂としては豊浦標準砂を用いた。また、養
生は水中養生ｌａ間後、２０℃、相対湿度５０％雰囲気
下に所定の期間放置して行った。The water/cement ratio is 65% and the sand/cement ratio is 20.
It is 0%. Toyoura standard sand was used as the sand. In addition, curing was carried out by leaving the sample in an atmosphere of 20° C. and 50% relative humidity for a predetermined period of time after curing in water for a period of 14 hours.
表 −１
（２）実施例の本発明の収縮低減剤と比較品（前述の特
開昭５８−３７２６９号公報に提案のもの）をセメント
′重量比０． １．０． ５．１． Ｏ１２、０１４
，０％添加したときの乾燥収縮率を測定した。 （試験
方法は実施例（１）と同様である。Table 1 (2) The shrinkage reducing agent of the present invention in the example and the comparative product (proposed in the above-mentioned Japanese Patent Application Laid-Open No. 58-37269) were used at a cement' weight ratio of 0. 1.0. 5.1. O12, 014
, the drying shrinkage rate when 0% was added was measured. (The test method is the same as in Example (1).
表−２
〔発明の効果〕
本発明のセメント用収縮低減剤は、少ない添加量でも収
縮低減効果が充分であり、また、従来のポリオキシアル
キレンアルキルエーテル系収縮低減剤と比較して安価な
アルコールであるため、従来の収縮低減剤に比較して低
コストでコンクリート等の乾燥収縮を大幅に低減できる
。Table 2 [Effects of the Invention] The shrinkage reducing agent for cement of the present invention has a sufficient shrinkage reducing effect even in a small amount added, and is less expensive than the conventional polyoxyalkylene alkyl ether based shrinkage reducing agent. Therefore, compared to conventional shrinkage reducing agents, drying shrinkage of concrete, etc. can be significantly reduced at a lower cost.
出願人 日本セメント株式会社 三洋化成工業株式会社Applicant: Nippon Cement Co., Ltd. Sanyo Chemical Industries Co., Ltd.
Claims (1)
５〜６のシクロアルキル基である。）で示されるアルコ
ールの１種または２種以上の混合物からなるセメント用
収縮低減剤。[Claims] 1. Alcohol represented by the general formula (1) ROH (1) (wherein R is an alkyl group having 4 to 6 carbon atoms or a cycloalkyl group having 5 to 6 carbon atoms) A shrinkage reducing agent for cement consisting of one type or a mixture of two or more types.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1129578A JPH066500B2 (en) | 1989-05-22 | 1989-05-22 | Shrinkage reducer for cement |
| US07/751,961 US5181961A (en) | 1989-05-22 | 1991-08-29 | Cement composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1129578A JPH066500B2 (en) | 1989-05-22 | 1989-05-22 | Shrinkage reducer for cement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02307849A true JPH02307849A (en) | 1990-12-21 |
| JPH066500B2 JPH066500B2 (en) | 1994-01-26 |
Family
ID=15012928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1129578A Expired - Lifetime JPH066500B2 (en) | 1989-05-22 | 1989-05-22 | Shrinkage reducer for cement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH066500B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5938835A (en) * | 1993-09-14 | 1999-08-17 | W. R. Grace & Co.-Conn. | Cement composition |
| JP2001342051A (en) * | 2000-05-31 | 2001-12-11 | Taiheiyo Cement Corp | Wet shotcrete |
| US6454850B2 (en) | 2000-04-28 | 2002-09-24 | Nippon Shokubai Co., Ltd. | Cement admixture and cement composition comprising this |
| JP2004501045A (en) * | 2000-03-31 | 2004-01-15 | ダブリュ・アール・グレイス・アンド・カンパニー・コネテイカット | Admixtures to minimize the presence of surface dust on cement and concrete structures |
| EP2223903A1 (en) * | 2009-02-06 | 2010-09-01 | Alexander Unger | Thin floating screed |
| EP2716615A1 (en) | 2012-10-04 | 2014-04-09 | Construction Research & Technology GmbH | Hydraulic composition |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102112412B (en) | 2008-07-31 | 2013-12-18 | 株式会社日本触媒 | Shrinkage-reducing agent for hydraulic material and shrinkage-reducing agent composition for hydraulic material |
| CN102695687A (en) | 2010-01-08 | 2012-09-26 | 株式会社日本触媒 | Shrinkage-reducing agent for hydraulic material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS572669A (en) * | 1980-06-04 | 1982-01-08 | Toyo Seikan Kaisha Ltd | Device for taking in and out inner container from outer container of transferring device for flexible packing material |
-
1989
- 1989-05-22 JP JP1129578A patent/JPH066500B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS572669A (en) * | 1980-06-04 | 1982-01-08 | Toyo Seikan Kaisha Ltd | Device for taking in and out inner container from outer container of transferring device for flexible packing material |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5938835A (en) * | 1993-09-14 | 1999-08-17 | W. R. Grace & Co.-Conn. | Cement composition |
| JP2004501045A (en) * | 2000-03-31 | 2004-01-15 | ダブリュ・アール・グレイス・アンド・カンパニー・コネテイカット | Admixtures to minimize the presence of surface dust on cement and concrete structures |
| JP4796730B2 (en) * | 2000-03-31 | 2011-10-19 | ダブリュー・アール・グレイス・アンド・カンパニー−コネチカット | Admixtures to minimize the presence of surface dust on cement and concrete structures. |
| US6454850B2 (en) | 2000-04-28 | 2002-09-24 | Nippon Shokubai Co., Ltd. | Cement admixture and cement composition comprising this |
| JP2001342051A (en) * | 2000-05-31 | 2001-12-11 | Taiheiyo Cement Corp | Wet shotcrete |
| EP2223903A1 (en) * | 2009-02-06 | 2010-09-01 | Alexander Unger | Thin floating screed |
| EP2716615A1 (en) | 2012-10-04 | 2014-04-09 | Construction Research & Technology GmbH | Hydraulic composition |
| WO2014053341A1 (en) | 2012-10-04 | 2014-04-10 | Construction Research & Technology Gmbh | Hydraulic composition |
| US9296657B2 (en) | 2012-10-04 | 2016-03-29 | Construction Research & Technology Gmbh | Hydraulic composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH066500B2 (en) | 1994-01-26 |
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