JPH0222157A - Neutralization controller for cement, control of neutralization of cement and cement of controlled neutralization - Google Patents
Neutralization controller for cement, control of neutralization of cement and cement of controlled neutralizationInfo
- Publication number
- JPH0222157A JPH0222157A JP17238188A JP17238188A JPH0222157A JP H0222157 A JPH0222157 A JP H0222157A JP 17238188 A JP17238188 A JP 17238188A JP 17238188 A JP17238188 A JP 17238188A JP H0222157 A JPH0222157 A JP H0222157A
- Authority
- JP
- Japan
- Prior art keywords
- cement
- neutralization
- group
- formula
- controller
- 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 abstract description 40
- 238000006386 neutralization reaction Methods 0.000 title claims abstract description 18
- 150000001875 compounds Chemical class 0.000 claims abstract description 20
- 239000003112 inhibitor Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 5
- 230000002401 inhibitory effect Effects 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims 1
- 230000001629 suppression Effects 0.000 claims 1
- 239000011150 reinforced concrete Substances 0.000 abstract description 18
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 abstract description 5
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 abstract description 4
- 229920000642 polymer Polymers 0.000 abstract description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000178 monomer Substances 0.000 abstract description 2
- 150000001412 amines Chemical class 0.000 abstract 1
- 235000011114 ammonium hydroxide Nutrition 0.000 abstract 1
- 239000004567 concrete Substances 0.000 description 15
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 6
- 239000001569 carbon dioxide Substances 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 239000000460 chlorine Substances 0.000 description 4
- 229910052801 chlorine Inorganic materials 0.000 description 4
- -1 chlorine ions Chemical class 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000004898 kneading 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
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 238000012661 block copolymerization Methods 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 125000006353 oxyethylene group Chemical group 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Landscapes
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、セメントの中性化抑制が技術に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a technology for suppressing carbonation of cement.
［従来の技術］
従来から、鉄筋コンクリート構造物の寿命は５０年から
６０年程度と考えられてきた。この寿命は、−船釣には
、コンクリートの表面から深部に向って進むコンクリー
トの中性化によって決定すると考えられている。即ちコ
ンクリート中のセメント成分は、主として水酸化カルシ
ウムであり、これに若干の水酸化アルカリ金属（水酸化
ナトリウム、水酸化カリウム等）が加わることによりｐ
Ｈ１２〜１３の強塩基性を呈するが、たとえば水酸化カ
ルシウムは、侵入した雨水等の存在下、空気中の炭酸ガ
スに触れると、炭酸カルシウムに変化して容易に中性化
される。そしてこの中性化領域が鉄筋の配設位置まで達
すると鉄筋は発錆し、鉄筋の引張り耐力が低下するので
、鉄筋コンクリート構造物としての耐力を失う。尚鉄筋
コンクリート構造物の耐久性を阻害する他の要因として
、塩分や酸類の様な鉄腐食物質がコンクリート内部に侵
入して鉄筋を腐食させることも挙げられる。[Prior Art] Conventionally, the lifespan of reinforced concrete structures has been thought to be approximately 50 to 60 years. This lifespan is thought to be determined by the carbonation of concrete, which progresses from the surface of the concrete to its depths. That is, the cement component in concrete is mainly calcium hydroxide, and by adding some alkali metal hydroxide (sodium hydroxide, potassium hydroxide, etc.)
Although it exhibits a strong basicity of H12-13, for example, when calcium hydroxide comes into contact with carbon dioxide gas in the air in the presence of rainwater or the like, it changes to calcium carbonate and is easily neutralized. When this neutralized region reaches the location where the reinforcing bars are placed, the reinforcing bars rust and the tensile strength of the reinforcing bars decreases, thus losing the strength of the reinforced concrete structure. Another factor that inhibits the durability of reinforced concrete structures is that iron corrosive substances such as salt and acids invade the interior of the concrete and corrode the reinforcing bars.
他方、鉄筋コンクリート構造物の耐久性を改善し、その
寿命を延長させるための手段としては、次の様な方法が
知られている。On the other hand, the following methods are known as means for improving the durability of reinforced concrete structures and extending their lifespan.
（１）鉄筋に対するコンクリートのかぶりを厚くする。(1) Thicken the concrete cover over the reinforcing bars.
（２）鉄筋コンクリートの水／セメント比を小さくする
。(2) Reduce the water/cement ratio of reinforced concrete.
（３）気密性にすぐれた仕上げ材を鉄筋コンクリートの
表面に施す。(3) Apply a finishing material with excellent airtightness to the surface of reinforced concrete.
［発明が解決しようとする課題］
しかしながらこれらの従来方法では、鉄筋コンクリート
の劣化を若干遅延させる効果が得られるに止り、鉄筋コ
ンクリートの寿命を大幅に延長する程の効果はなかった
。尚、仕上げ材によって中性化を抑制しようとする技術
では、仕上げ剤自身に優れた耐久性が要求されるが、現
状ではこの要求を充分に満足するものは開発されていな
い。この発明はこの様な事情に着目してなされたもので
あって、その目的は、鉄筋コンクリートを構成するセメ
ント中に分散させることによってその中性化を抑制し、
耐久性を高めることのできる中性化抑制剤及び中性化抑
制方法を開発し、その結果として耐久性の改善された鉄
筋コンクリートを提供しようとするものである。[Problems to be Solved by the Invention] However, these conventional methods only have the effect of slightly delaying the deterioration of reinforced concrete, and are not effective enough to significantly extend the life of reinforced concrete. In addition, in the technique of suppressing carbonation using a finishing material, the finishing agent itself is required to have excellent durability, but at present no material has been developed that fully satisfies this requirement. This invention was made in view of these circumstances, and its purpose is to suppress the carbonation of reinforced concrete by dispersing it in the cement that makes up the concrete.
The purpose of this project is to develop a carbonation inhibitor and a method for inhibiting carbonation that can increase durability, and as a result, to provide reinforced concrete with improved durability.
［課題を解決する為の手段］
上記の目的を達成することのできた本発明に係るセメン
ト用中性化抑制剤とは、
一般式
［式中Ｘ、Ｙ、Ｚは同一もしくは異なって、０個または
任意の自然数個の−Ｃ２）１４０−基と、０個または任
意の自然数個の−Ｃｓ）Ｉｅｏ−基が、任意の順序で゛
結合され、且つ一０２Ｎ、０−基および／または−Ｃ３
１（６０−基を少なくとも１個以上有する基を意味する
］
で示される化合物を含有するところに要旨を有するもの
である。また本発明に係る中性化抑制方法の構成は、上
記中性化抑制剤をセメント１００重量部に対し０．１〜
８．０重量部間合して硬化させるところに要旨を有する
ものであり、かくして得られる適量の中性化抑制剤が配
合されたセメント、或はセメント混練時に中性化抑制剤
を配合して水硬反応を生起せたモルタル、コンクリート
（例えば鉄筋コンクリート）等のセメント水硬物では、
上記中性化抑制剤が炭酸ガス、塩素イオン等を補集する
機能を有しているために中性化が起こり難く、且つ塩素
イオン等も侵入し難いという特性を有しているため鉄筋
の劣化が起こらず、優れた耐久性を示すものとなる。[Means for Solving the Problems] The carbonation inhibitor for cement according to the present invention that has achieved the above object has the general formula [wherein X, Y, and Z are the same or different, and 0] or any natural number of -C2)140- groups and 0 or any natural number of -Cs)Ieo- groups are bonded in any order, and 102N, 0- group and/or -C3
1 (meaning a group having at least one 60-group) The gist of the invention lies in that it contains a compound represented by: 0.1 to 100 parts by weight of inhibitor per 100 parts by weight of cement
The gist is that the cement is cured by adding 8.0 parts by weight, and the cement thus obtained is mixed with an appropriate amount of a neutralization inhibitor, or the cement is mixed with a neutralization inhibitor at the time of cement kneading. In cement hydraulic materials such as mortar and concrete (e.g. reinforced concrete) that have caused a hydraulic reaction,
Since the above-mentioned neutralization inhibitor has the function of collecting carbon dioxide gas, chlorine ions, etc., it is difficult for neutralization to occur, and it also has the property that chlorine ions, etc. are difficult to enter, so it is No deterioration occurs and it exhibits excellent durability.
［作用］
この発明の中性化抑制剤として作用する前記−般式（Ｉ
）で示される化合物において、Ｘ、 Ｙ２で示される基
は、同一もしくは異なって、０個または任意の自然数個
の−Ｃ２Ｈ４０−基と、０個または任意の自然数個の−
（：３ＨａＯ−基とが任意の順序で結合しているものを
含み、−Ｃ２Ｈ４０−基および／または−Ｃ３Ｈ１ｌＯ
−基を少なくとも１個以上含有するものとする。即ち−
Ｘ＋、−ｙ＋、−ｚ−は、同一もしくは異なってオキシ
エチレン基またはオキシプロピレン基のいずれか一方又
は両方が１以上任意数結合したものであり、２以上結合
したものを仮に重合と表現するならば、単独重合、ブロ
ック共重合、ランダム共重合等を構成していることを表
わしており、たとえば次の様なものが好ましいものとし
て挙げられる。[Function] The above general formula (I) which acts as a neutralization inhibitor of the present invention
) In the compound represented by
(Including those in which:3HaO- groups are bonded in any order, -C2H40- group and/or -C3H11O
- contains at least one group. That is -
X+, -y+, -z- are the same or different, and one or more oxyethylene groups or oxypropylene groups, or both, are bonded in any number, and if two or more bonds are expressed as polymerization, Examples include homopolymerization, block copolymerization, random copolymerization, etc., and the following are preferred examples.
ｉ）酸化エチレンの単独付加物あるいは重合物である場
合、−数式（Ｉ）における〜（：Ｊ４０−基の総和は４
〜１２の範囲が好ましい。i) In the case of a single adduct or polymer of ethylene oxide, the sum of ~(:J40- groups in formula (I) is 4
A range of 12 to 12 is preferable.
＋＋）酸化プロピレンの単独付加物あるいは重合物であ
る場合、−数式（Ｉ）における（：３ＨａＯ−基の総和
は４〜１６の範囲が好ましい。++) In the case of a single adduct or polymer of propylene oxide, the sum of the (:3HaO- groups in formula (I)) is preferably in the range of 4 to 16.
ｉｉ＋）酸化エチレンと酸化プロピレンのブロック共重
合物またはランダム共重合物である場合、−Ｃ２）１４
０−基と−Ｃ，）１．０−基の総和は４〜１６であって
、（−Ｃ２１１４０−基）／（−Ｃ３Ｈ，０−基）［モ
ル比コが１．０以下であるものが好ましい。ii+) When it is a block copolymer or random copolymer of ethylene oxide and propylene oxide, -C2)14
The total sum of 0- groups and -C,)1.0- groups is 4 to 16, and the molar ratio of (-C21140- groups)/(-C3H,0- groups) is 1.0 or less. is preferred.
上記−数式（１）で示される化合物は公知の化合物を含
み、たとえばアルカノールアミンまたはアンモニア水に
対し常法に従ってエチレンオキシドおよび／もしくはプ
ロピレンオキシドのモノマーまたは重合体（オリゴマー
を含む）を反応させることによって容易に得ることがで
きる。上記の好適要件を満たす化合物の中でも、特に好
ましいものの具体例を示すと次表の通りである。The compound represented by formula (1) above includes known compounds, and can be easily obtained by reacting, for example, alkanolamine or aqueous ammonia with monomers or polymers (including oligomers) of ethylene oxide and/or propylene oxide according to a conventional method. can be obtained. Among the compounds satisfying the above-mentioned preferable requirements, specific examples of particularly preferable compounds are shown in the following table.
数式（１）で示される上記の化合物を、セメント中に適
量含有させておくと、例えば鉄筋コンクリートにおける
コンクリート部分の圧縮強度等に悪影響を及ぼすことな
く当該コンクリート硬化物の中性化が抑制される他、塩
素イオン等の侵入も抑えられ、中性化および鉄腐食性イ
オンによる鉄筋の劣化が防止される結果、鉄筋コンクリ
ートの耐久性は著しく改善される。When an appropriate amount of the above compound represented by formula (1) is contained in cement, for example, carbonation of the hardened concrete can be suppressed without adversely affecting the compressive strength of the concrete part in reinforced concrete. The intrusion of chlorine ions, etc. is also suppressed, and deterioration of reinforcing bars due to neutralization and iron-corrosive ions is prevented, resulting in a marked improvement in the durability of reinforced concrete.
この化合物をモルタル、コンクリート（例えば鉄筋コン
クリート）内へ含有させる手順については一切制限がな
く、予め混練水やセメントに分散させておく方法、練り
上げ直前又は練り上がったコンクリート混練物に添加す
る方法、トラックミキサ−車等による搬送途中あるいは
現場到着後に添加する方法等を適宜採用することができ
、いずれの方法を採用するかは、−数式（１）で示され
る化合物の種類や添加量、コンクリート（例えば鉄筋コ
ンクリート）の種類や適用条件等を考慮してその都度最
適の方法を選定すればよい。There are no restrictions on the procedure for incorporating this compound into mortar or concrete (e.g. reinforced concrete); methods include dispersing it in mixing water or cement in advance, adding it to the concrete mix just before mixing or mixing it, and adding it to the mixed concrete mixture using a truck mixer. - A method of adding the compound during transportation by car or after arriving at the site can be adopted as appropriate. ) and the application conditions, etc., and select the most suitable method for each case.
この化合物のセメントあるいはコンクリート（例えば鉄
筋コンクリート）に対する好ましい配合量は、セメント
１００重量部に対して０．１〜８．０重量部の範囲であ
り、０．１重量部未満では前述の様な耐久性改善効果が
殆んど発揮されず、方８．０重量部を超える場合は不経
済であるばかりか、やや強度を低下させるなどの欠点を
生ずる。The preferred amount of this compound added to cement or concrete (for example, reinforced concrete) is in the range of 0.1 to 8.0 parts by weight per 100 parts by weight of cement, and if it is less than 0.1 part by weight, the durability as described above may be reduced. Almost no improvement effect is exhibited, and if the amount exceeds 8.0 parts by weight, it is not only uneconomical but also causes drawbacks such as a slight decrease in strength.
この化合物のより好ましい配合量は１〜６重量部である
。A more preferred amount of this compound is 1 to 6 parts by weight.
本発明に係る上記化合物が配合されるセメントの種類、
必要により配合される骨材あるいはその他の混和剤の種
類や量等には一切制限がなく、たとえばセメントの種類
としては、普通ポルトランドセメント、早強セメント、
中庸熱セメント、高炉セメント、フライアッシュセメン
トなど、通常市販されている様々のセメントを用途や要
求性能に応じて適宜使い分けることができ、場合によっ
ては一部をフライアッシュ、水砕スラグ粉末、シリカ貿
混合材等と置換することも可能である。またセメント用
減水剤や膨張剤、消泡剤の如き公知の鉄筋コンクリート
用混和材料を併用することもできる。The type of cement in which the above compound according to the present invention is mixed,
There are no restrictions on the type or amount of aggregate or other admixtures that may be added as necessary; for example, the types of cement may include ordinary Portland cement, early-strength cement,
Various commercially available cements such as moderate heat cement, blast furnace cement, and fly ash cement can be used as appropriate depending on the purpose and required performance. It is also possible to replace it with a mixed material or the like. Further, known admixtures for reinforced concrete such as water reducing agents for cement, swelling agents, and antifoaming agents can also be used in combination.
［実施例］
第１表に示す配合組成のコンクリートに対し、前記化合
物番号１〜７として示した各化合物を２重量％（対セメ
ント）添加した。尚添加法としては、混練水に加えて混
入させる方法を採用した。[Example] To concrete having the composition shown in Table 1, 2% by weight (based on cement) of each of the compounds shown as compound numbers 1 to 7 was added. As for the addition method, a method was adopted in which it was added to the kneading water and mixed.
尚セメントとしては、普通ポルトランドセメント（小野
田セメント、アサノセメント及び住人セメントの３種の
等景況合物、比重： ３．１６）を使用し、細骨材とし
ては富士用度川砂（ＦＭ：２．７５、比重： ２．６４
）を、また粗骨材としては笠間産砕石（Ｇ□、Ｉ： ２
０ｍｍ、 Ｆ Ｍ ： ６．６９、比重： ２．６７）
を夫々使用した。As the cement, ordinary Portland cement (a mixture of three types of equal conditions: Onoda cement, Asano cement, and Susumu cement, specific gravity: 3.16) was used, and as the fine aggregate, Fuji Tokawa sand (FM: 2. 75, specific gravity: 2.64
), and crushed stone from Kasama (G□, I: 2
0mm, FM: 6.69, specific gravity: 2.67)
were used respectively.
得られた混練物を１０ｘｌｌＯｘ１０Ｘ４０（の直方体
型枠内へ充填し、約２０℃の多湿恒温室内で４週間養生
した後、２０″’ｔ：ｘ６０％Ｒ，Ｈ，（Ｄ雰囲気中で
１週間乾燥した。The obtained kneaded material was packed into a rectangular parallelepiped frame of 10xllOx10x40 (10x11Ox10x40), cured for 4 weeks in a humid constant temperature room at about 20°C, and then dried for 1 week in a 20''t:x60% R, H, (D atmosphere). did.
得られた各供試体を３０℃、６０％Ｒ，Ｈ，、炭酸ガス
濃度５％の槽内に入れて１か月間放置した。この試験は
、炭酸ガスによるコンクリートの中性化促進試験として
行なったものである。Each of the obtained specimens was placed in a tank at 30° C., 60% R, H, and 5% carbon dioxide concentration, and left for one month. This test was conducted as a test to accelerate the carbonation of concrete using carbon dioxide gas.
１か月間の放置後、各供試体を槽から取り出し、供試体
を中央付近で割って、割れた表面にフェノールフタレイ
ンのエチルアルコール溶液（濃度１％）を吹き付ける。After being left for one month, each specimen is removed from the tank, broken near the center, and an ethyl alcohol solution of phenolphthalein (1% concentration) is sprayed onto the cracked surface.
モルタルがアルカリ性を保っている部分では表面が赤色
に変わり、中性化した部分では変色しない。従って変色
域を観察することによって中性化の進んだ深さを測定し
た。In areas where the mortar remains alkaline, the surface turns red, and in areas where it is neutralized, it does not change color. Therefore, the depth to which neutralization had progressed was measured by observing the area of discoloration.
結果は第２表に示す通りであり、いずれの化合物を添加
したものも、無添加のものに比べると中性化域は大幅に
浅くなっている。The results are shown in Table 2, and the neutralization range of the samples to which any of the compounds were added was significantly shallower than that of the samples without any additives.
第 ２ 表
［発明の効果］
この発明は以上の様に構成されており、前記−数式（１
）で示される化合物をセメント中に適量含有させること
によって、当該硬化物の中性化を抑制すると共に塩素イ
オンの侵入も抑制することができ、例えば鉄筋コンクリ
ート等の耐久性を著しく改善し得ることになった。Table 2 [Effects of the invention] This invention is configured as described above, and the formula (1
) By incorporating an appropriate amount of the compound shown in cement into cement, it is possible to suppress the neutralization of the cured product and also suppress the intrusion of chlorine ions, which can significantly improve the durability of reinforced concrete, etc. became.
Claims (3)
任意の自然数個の−Ｃ＿２Ｈ＿４Ｏ−基と、０個または
任意の自然数個の−Ｃ＿３Ｈ＿６Ｏ−基が、任意の順序
で結合され、且つ−Ｃ＿２Ｈ＿４Ｏ−基および／または
−Ｃ＿３Ｈ＿６Ｏ−基を少なくとも１個以上有する基を
意味する］ で示される化合物を含有することを特徴とするセメント
用中性化抑制剤。(1) General formula ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ [In the formula, X, Y, and Z are the same or different and contain 0 or any natural number of -C_2H_4O- groups and 0 or any natural number of -C_2H_4O- groups. -C_3H_6O- groups are bonded in any order and mean a group having at least one -C_2H_4O- group and/or -C_3H_6O- group] A cement characterized by containing a compound represented by the following. Neutralization inhibitor for use.
ト１００重量部に対し０．１〜８．０重量部配合して硬
化させることを特徴とするセメントの中性化抑制方法。(2) A method for inhibiting carbonation of cement, which comprises adding 0.1 to 8.0 parts by weight of the neutralization inhibitor according to claim (1) to 100 parts by weight of cement and curing the mixture. .
ト１００重量部に対して０．１〜８．０重量部含有させ
たものであることを特徴とする中性化の抑制されたセメ
ント。(3) Suppression of carbonation characterized by containing 0.1 to 8.0 parts by weight of the neutralization inhibitor according to claim (1) based on 100 parts by weight of cement. cement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17238188A JPH0222157A (en) | 1988-07-11 | 1988-07-11 | Neutralization controller for cement, control of neutralization of cement and cement of controlled neutralization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17238188A JPH0222157A (en) | 1988-07-11 | 1988-07-11 | Neutralization controller for cement, control of neutralization of cement and cement of controlled neutralization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0222157A true JPH0222157A (en) | 1990-01-25 |
Family
ID=15940859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17238188A Pending JPH0222157A (en) | 1988-07-11 | 1988-07-11 | Neutralization controller for cement, control of neutralization of cement and cement of controlled neutralization |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0222157A (en) |
-
1988
- 1988-07-11 JP JP17238188A patent/JPH0222157A/en active Pending
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