JPH0526740B2 - - Google Patents
Info
- Publication number
- JPH0526740B2 JPH0526740B2 JP60002985A JP298585A JPH0526740B2 JP H0526740 B2 JPH0526740 B2 JP H0526740B2 JP 60002985 A JP60002985 A JP 60002985A JP 298585 A JP298585 A JP 298585A JP H0526740 B2 JPH0526740 B2 JP H0526740B2
- Authority
- JP
- Japan
- Prior art keywords
- cement
- concrete
- formwork
- present
- product
- 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.)
- Expired - Lifetime
Links
- 239000004568 cement Substances 0.000 claims description 13
- 239000002270 dispersing agent Substances 0.000 claims description 7
- IVJISJACKSSFGE-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine Chemical compound O=C.NC1=NC(N)=NC(N)=N1 IVJISJACKSSFGE-UHFFFAOYSA-N 0.000 claims description 5
- ULUAUXLGCMPNKK-UHFFFAOYSA-N Sulfobutanedioic acid Chemical compound OC(=O)CC(C(O)=O)S(O)(=O)=O ULUAUXLGCMPNKK-UHFFFAOYSA-N 0.000 claims description 4
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 4
- 238000009415 formwork Methods 0.000 description 8
- 239000000126 substance Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000003638 chemical reducing agent Substances 0.000 description 3
- -1 gravel Substances 0.000 description 3
- 239000002480 mineral oil Substances 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000003863 ammonium salts Chemical class 0.000 description 2
- 235000019329 dioctyl sodium sulphosuccinate Nutrition 0.000 description 2
- YHAIUSTWZPMYGG-UHFFFAOYSA-L disodium;2,2-dioctyl-3-sulfobutanedioate Chemical compound [Na+].[Na+].CCCCCCCCC(C([O-])=O)(C(C([O-])=O)S(O)(=O)=O)CCCCCCCC YHAIUSTWZPMYGG-UHFFFAOYSA-L 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 235000010446 mineral oil Nutrition 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000006082 mold release agent Substances 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- WHRZCXAVMTUTDD-UHFFFAOYSA-N 1h-furo[2,3-d]pyrimidin-2-one Chemical compound N1C(=O)N=C2OC=CC2=C1 WHRZCXAVMTUTDD-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 235000006173 Larrea tridentata Nutrition 0.000 description 1
- 244000073231 Larrea tridentata Species 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229960002126 creosote Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- KVBGVZZKJNLNJU-UHFFFAOYSA-N naphthalene-2-sulfonic acid Chemical compound C1=CC=CC2=CC(S(=O)(=O)O)=CC=C21 KVBGVZZKJNLNJU-UHFFFAOYSA-N 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 150000008054 sulfonate salts Chemical class 0.000 description 1
- 239000008030 superplasticizer Substances 0.000 description 1
- 125000004417 unsaturated alkyl group Chemical group 0.000 description 1
Description
〔産業上の利用分野〕
本発明はセメント分散剤、更に詳しくは製品の
表面美観性を改善したコンクリートおよびモルタ
ル用セメント分散剤に関するものである。
〔従来の技術〕
従来、ブレキヤストコンクリート製品は例えば
セメント、砂、砂利、水等を混合したセメント含
有物質を型枠内に注入した後に、内部又は外部振
動機により型枠内のセメント含有物質中から空隙
を追い出し型枠内に最密充填する工法が採られて
いる。また高強度製品を得るため、単位水量を減
じてもセメント含有物質の流動性を保ち、かつ振
動による充填性を改善できる高性能減水剤が一般
に使用されている。
〔発明が解決しようとする問題点〕
しかし前記の工法では大きな空隙は振動により
取り除くことができるが、小さな空気泡が型枠と
コンクリート製品との間に残つたり、製品の一部
が型枠に付着したりして、コンクリート製品の表
面の美観は著しく悪いものとなつている。またこ
れらを改善する方法として型枠側に離型剤として
鉱物油等を塗布することが一般に行われている
が、これはコンクリート製品と型枠との離型性の
改善には適しているが、コンクリート表面上の空
気泡を無くするには未だ不充分である。
〔問題点を解決するための手段〕
本発明者等は前記コンクリート製品の欠点を改
善すべく鋭意研究したところ、セメント含有物質
の表面張力を下げることが出来かつ起泡性が小さ
い特定のアニオン界面活性剤を特定の高性能減水
剤と組み合わせることにより、コンクリート製品
の表面上の空気泡を無くし、その美観性を著しく
改善できることを見い出した。
即ち、本発明をメラミンホルマリン縮合物のス
ルホン酸塩に、ジアルキルスルホコハク酸塩を重
量で0.1〜10％添加してなることを特徴とするセ
メント分散剤を提供するものである。
本発明のセメント分散剤を添加したコンクリー
トおよびモルタル等のセメント含有物質は、その
表面張力が低下しているため、型枠面に塗布され
た鉱物油類との親和性が良くなり、型枠上の小さ
な空気泡はセメント含有物質と置きかわり、内部
に移行することにより、従来の欠点が除かれるも
のと考えられる。
本発明で使用されるアニオン界面活性剤である
ジアルキルスルホコハク酸塩（アルキルは炭素数
６〜18の飽和又は不飽和アルキル基、塩はアルカ
リ金属塩又はアンモニウム塩）としてはジオクチ
ルスルホコハク酸ナトリウム（ペレツクスOTP
花王石鹸製商品名）等が有効であり、少量の添加
量でセメント含有物質の表面張力を下げかつ起泡
性が小さいことで優れている。
また本発明で使用される高性能減水剤であるメ
ラミンホルマリン縮合物のスルホン酸塩（アルカ
リ金属塩又はアンモニウム塩）は前記界面活性剤
の性能をそこなわないものとして有効である。之
に対して高性能減水剤として知られるβ−ナフタ
レンスルホン酸およびクレオソート油スルホン酸
のホルマリン縮合物等は前記界面活性剤の性能を
劣化させる傾向を示すため好ましくない。
本発明の分散剤の組成はメラミンホルマリン縮
合物のスルホン酸塩に対しジアルキルスルホコハ
ク酸塩を重量で0.1〜10％添加してなるものであ
り、最適には１〜５％である。これよりも低い添
加量域では表面美観製の改善効果は小さくなり、
又多い添加量域では空気連行量が増し好ましくな
い。
〔実施例〕
次に本発明を実施例を挙げて説明するが、本発
明はこれらの実施例に限定されるものではない。
実施例
メラミンホルマリン縮合物のスルホン酸ナトリ
ウム（メルトントＦ−10昭和電工製）にジオクチ
ルスルホコハク酸ナトリウム（ペレツクスOTP
花王石鹸製）を配合してなる分散剤（表−１）を
用いて、表−２に示す配合でコンクリートを練り
上げた後、スランプとして空気量を測定した。そ
の後鉱物油を離型剤として塗布したφ10×20cm円
柱型枠内にコンクリートを詰めテーブルバイブレ
ーターにて15秒振動充填を行い、試験体を成型し
た。その結果を表−３に示す。
[Industrial Application Field] The present invention relates to a cement dispersant, and more particularly to a cement dispersant for concrete and mortar that improves the surface appearance of the product. [Prior Art] Conventionally, brake cast concrete products are manufactured by injecting a cement-containing substance mixed with cement, sand, gravel, water, etc. into a formwork, and then using an internal or external vibrator to shake up the cement-containing substance in the formwork. The method used is to remove the voids from the mold and close-pack it into the formwork. In addition, in order to obtain high-strength products, high-performance water reducing agents are generally used that can maintain the fluidity of cement-containing substances even when the unit water amount is reduced, and can improve filling properties due to vibration. [Problems to be solved by the invention] However, although large voids can be removed by vibration in the above construction method, small air bubbles may remain between the formwork and the concrete product, or a part of the product may be removed from the formwork. The appearance of the surface of concrete products has become extremely poor. In addition, as a method to improve these problems, it is common practice to apply mineral oil or the like as a mold release agent to the formwork side, but this is suitable for improving the releasability between the concrete product and the formwork. , is still insufficient to eliminate air bubbles on the concrete surface. [Means for Solving the Problems] The present inventors conducted intensive research to improve the drawbacks of the above concrete products, and found that a specific anion interface that can lower the surface tension of cement-containing substances and has low foamability. It has been found that by combining an activator with a specific superplasticizer, it is possible to eliminate air bubbles on the surface of a concrete product and significantly improve its aesthetic appearance. That is, the present invention provides a cement dispersant characterized by adding 0.1 to 10% by weight of a dialkyl sulfosuccinate to a sulfonate of a melamine-formalin condensate. Cement-containing materials such as concrete and mortar to which the cement dispersant of the present invention has been added have lower surface tension, so they have better affinity with mineral oils applied to the formwork surface, and It is believed that the small air bubbles replace the cement-containing material and migrate inside, thereby eliminating the conventional drawbacks. The dialkyl sulfosuccinate (alkyl is a saturated or unsaturated alkyl group having 6 to 18 carbon atoms, the salt is an alkali metal salt or ammonium salt) which is an anionic surfactant used in the present invention includes sodium dioctyl sulfosuccinate (Pelex OTP).
Kao Soap (product name) etc. are effective, and are excellent because they lower the surface tension of cement-containing substances when added in small amounts and have low foaming properties. Furthermore, the sulfonate salt (alkali metal salt or ammonium salt) of a melamine-formalin condensate, which is a high-performance water reducing agent used in the present invention, is effective as it does not impair the performance of the surfactant. On the other hand, formalin condensates of .beta.-naphthalene sulfonic acid and creosote oil sulfonic acid, which are known as high performance water reducing agents, tend to deteriorate the performance of the surfactant and are therefore not preferred. The composition of the dispersant of the present invention is such that 0.1 to 10% by weight of dialkyl sulfosuccinate is added to the sulfonate of the melamine-formalin condensate, and optimally it is 1 to 5%. If the amount added is lower than this, the effect of improving surface appearance will be small.
Further, in a large addition amount range, the amount of air entrained increases, which is not preferable. [Example] Next, the present invention will be described with reference to Examples, but the present invention is not limited to these Examples. Example Sodium dioctyl sulfosuccinate (Pelex OTP) was added to sodium sulfonate of melamine-formalin condensate (Meltont F-10 manufactured by Showa Denko).
After kneading concrete according to the formulation shown in Table 2 using a dispersant (Table 1) prepared by Kao Soap Co., Ltd., the amount of air was measured as slump. Thereafter, concrete was filled in a φ10 x 20 cm cylindrical form coated with mineral oil as a mold release agent, and vibration filling was performed for 15 seconds using a table vibrator to form a test specimen. The results are shown in Table-3.
【表】【table】
【表】【table】
【表】【table】
【表】
明らかに本発明品によれば空気量が増えずしか
も圧縮強度に影響を与えず、表面美観性が改善さ
れている。[Table] Clearly, the product of the present invention does not increase the amount of air, does not affect the compressive strength, and has improved surface appearance.
Claims (1)
に、ジアルキルスルホコハク酸塩を重量で0.1〜
10％添加してなることを特徴とするセメント分散
剤。1 Add dialkyl sulfosuccinate to the sulfonate of melamine-formalin condensate by weight from 0.1 to
A cement dispersant characterized by the addition of 10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP298585A JPS61163158A (en) | 1985-01-11 | 1985-01-11 | Cement dispersion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP298585A JPS61163158A (en) | 1985-01-11 | 1985-01-11 | Cement dispersion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61163158A JPS61163158A (en) | 1986-07-23 |
| JPH0526740B2 true JPH0526740B2 (en) | 1993-04-19 |
Family
ID=11544659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP298585A Granted JPS61163158A (en) | 1985-01-11 | 1985-01-11 | Cement dispersion |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61163158A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5052115A (en) * | 1973-09-06 | 1975-05-09 | ||
| JPS55121944A (en) * | 1979-03-12 | 1980-09-19 | Nippon Kouatsu Concrete Kk | Water reducing agent for concrete |
| JPS59227754A (en) * | 1983-06-06 | 1984-12-21 | 三井化学株式会社 | Low shrinkage self leveling material |
-
1985
- 1985-01-11 JP JP298585A patent/JPS61163158A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5052115A (en) * | 1973-09-06 | 1975-05-09 | ||
| JPS55121944A (en) * | 1979-03-12 | 1980-09-19 | Nippon Kouatsu Concrete Kk | Water reducing agent for concrete |
| JPS59227754A (en) * | 1983-06-06 | 1984-12-21 | 三井化学株式会社 | Low shrinkage self leveling material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61163158A (en) | 1986-07-23 |
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