JPH0492841A - Cement dispersant - Google Patents
Cement dispersantInfo
- Publication number
- JPH0492841A JPH0492841A JP20652490A JP20652490A JPH0492841A JP H0492841 A JPH0492841 A JP H0492841A JP 20652490 A JP20652490 A JP 20652490A JP 20652490 A JP20652490 A JP 20652490A JP H0492841 A JPH0492841 A JP H0492841A
- Authority
- JP
- Japan
- Prior art keywords
- condensate
- cement
- sulfonic acid
- acid
- molecular weight
- 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 45
- 239000002270 dispersing agent Substances 0.000 title claims abstract description 24
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims abstract description 23
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 claims abstract description 14
- 125000003118 aryl group Chemical group 0.000 claims abstract description 10
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical compound C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229920000877 Melamine resin Polymers 0.000 claims description 4
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 4
- WHOZNOZYMBRCBL-OUKQBFOZSA-N (2E)-2-Tetradecenal Chemical compound CCCCCCCCCCC\C=C\C=O WHOZNOZYMBRCBL-OUKQBFOZSA-N 0.000 claims 2
- MDNNEPROFRHBBU-UHFFFAOYSA-N 4-aminobenzenesulfonic acid phenylsulfamic acid Chemical compound S(=O)(C1=CC=C(C=C1)N)(=O)O.N(C1=CC=CC=C1)S(=O)(=O)O MDNNEPROFRHBBU-UHFFFAOYSA-N 0.000 claims 2
- 229940044654 phenolsulfonic acid Drugs 0.000 claims 2
- 150000003460 sulfonic acids Chemical class 0.000 claims 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims 1
- 239000004567 concrete Substances 0.000 abstract description 8
- 239000002253 acid Substances 0.000 abstract description 4
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 34
- 239000000203 mixture Substances 0.000 description 13
- 239000003638 chemical reducing agent Substances 0.000 description 9
- 150000003839 salts Chemical class 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 239000012528 membrane Substances 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- 229920000642 polymer Polymers 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 238000000926 separation method Methods 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 5
- 238000005194 fractionation Methods 0.000 description 5
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000004088 foaming agent Substances 0.000 description 3
- 238000005227 gel permeation chromatography Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000000108 ultra-filtration Methods 0.000 description 3
- 239000002956 ash Substances 0.000 description 2
- 239000011362 coarse particle Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 239000003480 eluent Substances 0.000 description 2
- 239000011372 high-strength concrete Substances 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000012925 reference material Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 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
- 239000011398 Portland cement Substances 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- -1 accelerators Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- 239000003429 antifungal agent Substances 0.000 description 1
- 229940121375 antifungal agent Drugs 0.000 description 1
- 238000010420 art technique Methods 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 150000001244 carboxylic acid anhydrides Chemical class 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 239000007859 condensation product Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- NVVZQXQBYZPMLJ-UHFFFAOYSA-N formaldehyde;naphthalene-1-sulfonic acid Chemical compound O=C.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 NVVZQXQBYZPMLJ-UHFFFAOYSA-N 0.000 description 1
- RRDQTXGFURAKDI-UHFFFAOYSA-N formaldehyde;naphthalene-2-sulfonic acid Chemical compound O=C.C1=CC=CC2=CC(S(=O)(=O)O)=CC=C21 RRDQTXGFURAKDI-UHFFFAOYSA-N 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000010903 husk Substances 0.000 description 1
- 239000011396 hydraulic cement Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- VOVZXURTCKPRDQ-CQSZACIVSA-N n-[4-[chloro(difluoro)methoxy]phenyl]-6-[(3r)-3-hydroxypyrrolidin-1-yl]-5-(1h-pyrazol-5-yl)pyridine-3-carboxamide Chemical compound C1[C@H](O)CCN1C1=NC=C(C(=O)NC=2C=CC(OC(F)(F)Cl)=CC=2)C=C1C1=CC=NN1 VOVZXURTCKPRDQ-CQSZACIVSA-N 0.000 description 1
- 239000006072 paste Substances 0.000 description 1
- 229920001467 poly(styrenesulfonates) Polymers 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 229940006186 sodium polystyrene sulfonate Drugs 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000013268 sustained release Methods 0.000 description 1
- 239000012730 sustained-release form Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 230000002747 voluntary effect Effects 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Landscapes
- 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〕
本発明は、セメント分散剤、更に詳しくは、セメント組
成物であるセメントペースト、モルタル及びコンクリー
トに使用する超高性能減水剤に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cement dispersant, and more particularly to an ultra-high performance water reducing agent used in cement compositions such as cement paste, mortar, and concrete.
建築物の高層化及び地下空間の大深度化が進むにつれ、
圧縮強度1.000kg/ alを越える高強度コンク
リートのニーズが増大すると共に、水/セメン) (W
/C)の割合が25%以下の超高減水領域でも分散性を
有する高性能減水剤への関心が高まっている。As buildings become taller and underground spaces become deeper,
As the need for high-strength concrete with a compressive strength exceeding 1.000 kg/al increases, the demand for water/cement) (W
There is increasing interest in high-performance water reducing agents that have dispersibility even in the ultra-high water reduction range where the ratio of /C) is 25% or less.
一般に高性能減水剤としては、各種のものが知られてお
り、代表的なものとしては、β−ナフタレンスルホン酸
ホルムアルデヒド縮合物(以下β−NSFと略す)塩、
メラミンスルホン酸ホルムアルデヒド縮合物塩等がある
。これらはセメント組成物を混練する際に使用され、こ
れら高性能減水剤により使用水量の減少、並びに流動性
の付与等の効果が得られる。In general, various types of high-performance water reducing agents are known, and representative ones include β-naphthalenesulfonic acid formaldehyde condensate (hereinafter abbreviated as β-NSF) salt,
Examples include melamine sulfonic acid formaldehyde condensate salts. These are used when kneading cement compositions, and these high-performance water reducing agents provide effects such as reducing the amount of water used and imparting fluidity.
ところが、これらの公知の分散剤はいずれも使用可能な
セメントに対する水の割合の限界が30%までであり、
それ以下の超高減水領域ではほとんど流動性が発現しな
いことが知られている。However, for all of these known dispersants, the usable water ratio to cement is limited to 30%.
It is known that fluidity hardly develops in the ultra-high water reduction range below this range.
また、芳香族スルホン酸ホルマリン縮合物塩の高縮合物
はホルマリンを過剰に添加し、高縮合化させることによ
っても得られる。しかしながら、反応による高縮合化の
場合反応槽内での粘性の増大による攪拌効率の低下や反
応時間の延長等の製造面での問題だけでなく、分子量の
制御が困難であるので、分子量分布の幅が広くなるとい
う問題があり、それ故意図する分子量の高縮合物を有効
に得るには適切でない。Further, a high condensate of an aromatic sulfonic acid formalin condensate salt can also be obtained by adding an excessive amount of formalin and causing high condensation. However, in the case of high condensation by reaction, there are not only problems in production such as decreased stirring efficiency and extended reaction time due to increased viscosity in the reaction tank, but also because it is difficult to control the molecular weight. There is a problem that the width becomes wide, and it is not suitable for effectively obtaining a high condensate with a intentionally designed molecular weight.
本発明は、水とセメントとの割合が30%以下の超高減
水領域でも流動性を有するセメント分散剤を提供するこ
とを目的としている。An object of the present invention is to provide a cement dispersant that has fluidity even in an ultra-high water reduction region where the ratio of water to cement is 30% or less.
[l1題を解決するための手段〕
本発明者らは高分子分離膜等による分画によって容易に
高縮合度物を得ることができ、またそのセメントに対す
る水の割合(以下W/Cと略する)が18%〜30%で
ある超高減水領域においてもセメント分散剤として極め
て有効であることを見出し、本発明を完成するに至った
。[Means for Solving Problem 1] The present inventors can easily obtain a highly condensed product by fractionation using a polymer separation membrane, etc., and the ratio of water to cement (hereinafter abbreviated as W/C). The present inventors have discovered that it is extremely effective as a cement dispersant even in the ultra-high water reduction range where the amount of water used is 18% to 30%, leading to the completion of the present invention.
即ち、本発明は芳香族スルホン酸ホルマリン縮合物を主
成分とし、該縮合物の重量平均分子量が2万以上で且つ
分子量1万以下の縮合物の割合が全縮合物の50重量%
未満であ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。That is, the present invention has an aromatic sulfonic acid formalin condensate as a main component, and the weight average molecular weight of the condensate is 20,000 or more, and the proportion of the condensate with a molecular weight of 10,000 or less is 50% by weight of the total condensate.
The object of the present invention is to provide a cement dispersant characterized in that it is less than
本発明のセメント分散剤は芳香族スルホン酸ホルマリン
縮合生成物から低縮合物を高分子分離膜により除去する
ことにより得ることができる。The cement dispersant of the present invention can be obtained by removing low condensates from an aromatic sulfonic acid formalin condensation product using a polymer separation membrane.
本発明に用いる縮合物は平均分子量が2万以上且つ分子
量1万以下の縮合物の割合が50重量%未満であれば、
W/C比が18%〜30%の超高減水領域においてもセ
メント分散剤としての効果を発揮するが、望ましくは重
量平均分子量は2万〜10万が良い。又たとえ、平均分
子量が2万以上であっても、分子量が1万以下の縮合物
の割合が50%以上存在すると、流動化が阻害され、W
/C比が30%以下、特に18〜25%での超高減水領
域での使用が困難である。If the condensate used in the present invention has an average molecular weight of 20,000 or more and a molecular weight of 10,000 or less, the proportion of the condensate is less than 50% by weight,
Although it is effective as a cement dispersant even in the ultra-high water reduction range where the W/C ratio is 18% to 30%, the weight average molecular weight is preferably 20,000 to 100,000. Furthermore, even if the average molecular weight is 20,000 or more, if the proportion of condensates with a molecular weight of 10,000 or less is 50% or more, fluidization will be inhibited and W
It is difficult to use it in the ultra-high water reduction range where the /C ratio is 30% or less, especially 18 to 25%.
本発明のセメント分散剤は、W/Cが18%〜30%の
超高減水領域において特にその分散効果を発揮するが、
W/Cが30%以上の通常の減水領域及び18%未満の
超高減水領域においても分散効果を発現する。The cement dispersant of the present invention exhibits its dispersion effect particularly in the ultra-high water reduction region where W/C is 18% to 30%.
The dispersion effect is exhibited even in the normal water reduction region where W/C is 30% or more and in the ultra-high water reduction region where W/C is less than 18%.
本発明に使用する高縮合物を得るため低縮合物を除去す
るには高分子分離膜を使用するが、その実施に当っては
高分子分離膜の内で特に限外濾過膜が適しており、ポリ
スルホン系(例えば旭化成工業■製5IP−1013)
、ポリアクリロニトリル系(例えば旭化成工業■製A
HL−1010、^CL−1010)の限外濾過膜を使
用することができる。A polymer separation membrane is used to remove low condensates to obtain the high condensates used in the present invention, and ultrafiltration membranes are particularly suitable among polymer separation membranes for this purpose. , polysulfone type (e.g. 5IP-1013 manufactured by Asahi Kasei Corporation)
, polyacrylonitrile type (for example, Asahi Kasei Kogyo A)
HL-1010, CL-1010) ultrafiltration membranes can be used.
従来高分子分離膜を利用して低縮合物を除去し、分散剤
の性能を向上する方法については、従来特開昭59−1
11964号公報及び特開昭60−139328号公報
に開示されている。しかしこれらの先行技術による分画
では、取り除く範囲の縮合物の平均分子量が数千単位の
ものにすぎず、得られた縮合物のW/C比が30%未満
の超高減水領域での使用は困難であった。これに対して
本発明は重量平均分子量2万以上の高縮合物で、分子量
1万以下の縮合物の割合が全縮合物の50重量%以下の
ものをW/C比が18%〜30%の超高減水領域で使用
して従来予想し得なかった優れたセメント分散効果を奏
するもので、上記の如き従来技術とは明らかに区別され
るものである。Conventionally, a method of removing low condensates using a polymer separation membrane and improving the performance of a dispersant is disclosed in Japanese Patent Application Laid-open No. 59-1.
It is disclosed in Japanese Patent Application Laid-open No. 11964 and Japanese Patent Application Laid-Open No. 139328/1983. However, in the fractionation according to these prior art techniques, the average molecular weight of the condensate to be removed is only a few thousand units, and the resulting condensate cannot be used in the ultra-high water reduction region where the W/C ratio is less than 30%. was difficult. On the other hand, the present invention uses high condensates with a weight average molecular weight of 20,000 or more, in which the proportion of condensates with a molecular weight of 10,000 or less is 50% by weight or less of the total condensate, and the W/C ratio is 18% to 30%. When used in the ultra-high water reduction area of 2000, it exhibits an excellent cement dispersion effect that could not have been expected in the past, and is clearly distinguishable from the prior art as described above.
本発明のセメント分散剤に使用する縮合物は、酸のまま
でも使用されるが、−i的には塩の形で使用するのが好
ましい。形成するカチオンとしては、ナトリウム、カリ
ウム、カルシウム、アンモニウム、アルカノールアミン
、N−アルキル置換ポリアミン、エチレンジアミン、ポ
リエチレンポリアミン又はこれらのアルキレンオキサイ
ド付加物等が挙げられる。Although the condensate used in the cement dispersant of the present invention can be used as an acid, it is preferable to use it in the form of a salt. Examples of the cations formed include sodium, potassium, calcium, ammonium, alkanolamines, N-alkyl-substituted polyamines, ethylenediamine, polyethylenepolyamines, and alkylene oxide adducts thereof.
本発明のセメント分散剤の添加量は、水硬性セメント組
成物のセメントに対する固形分の重量%として0.1〜
2.5が良い。0.1%未満であれば、セメント粒子に
対して十分な分散効果とスランプロス防止効果が得られ
ない可能性がある。又、2.5%を越えると経済的に不
利であったり、セメント粒子の分散が過度となってブリ
ージングやペースト分離を引き起こしたり、凝結時間の
増大を引き起こし初期強度が低下する可能性がある。The amount of the cement dispersant of the present invention added is from 0.1 to 0.1% by weight of the solid content relative to the cement of the hydraulic cement composition.
2.5 is good. If it is less than 0.1%, sufficient dispersion effect and slump loss prevention effect on cement particles may not be obtained. Moreover, if it exceeds 2.5%, it may be economically disadvantageous, or the dispersion of cement particles may become excessive, causing breathing or paste separation, or the setting time may increase, leading to a decrease in initial strength.
本発明によるセメント分散剤のセメント配合物への添加
方法は、水溶液又は粉末でも可能であり、またその添加
時期は、セメントとのトライブレンド、混練水への溶解
、又はセメント配合物の混練開始即ちセメントへの注水
と同時もしくは注水直後からセメント配合物の混練終了
までの間に添加することも可能であり、さらに−旦練り
上がったセメント配合物への添加も可能である。又、本
発明の分散剤は一時に全量添加する方法あるいは数回に
分割して添加することも可能である。The cement dispersant according to the present invention can be added to a cement mixture in the form of an aqueous solution or powder, and the time of addition can be determined by tri-blending with cement, dissolving in mixing water, or at the start of mixing the cement mixture. It is possible to add it at the same time as water is poured into the cement, or immediately after water is poured into the cement until the end of kneading of the cement mixture, and it is also possible to add it to the cement mixture that has already been kneaded. Further, the dispersant of the present invention can be added in its entirety at once, or it can be added in several portions.
また、減水剤を併用する場合は、ナフタレンスルホン酸
ホルマリン縮合物又はその塩、リグニンスルホン酸又は
その塩、メラミンスルホン酸ホルマリン縮合物又はその
塩、あるいはポリカルボン酸又はその塩、ポリアルキル
無水カルボン酸又はその塩などの減水剤と予め混合して
おいても良く、又、一方をセメント又はセメント配合物
に配合した後、あるいは一方をセメント又はセメント配
合物に配合して練っておいてから他方を配合しても良い
。In addition, when using a water reducing agent together, naphthalene sulfonic acid formalin condensate or its salt, lignin sulfonic acid or its salt, melamine sulfonic acid formalin condensate or its salt, polycarboxylic acid or its salt, polyalkyl carboxylic anhydride Alternatively, one may be mixed in advance with a water reducing agent such as a salt thereof, or one may be mixed with cement or a cement mixture, or one may be mixed with cement or a cement mixture and kneaded before the other is added. May be combined.
また、他のセメント添加剤(材)、例えば、徐放性分散
剤、AE減水剤、流動化剤、高性能減水剤、遅延剤、早
強剤、促進剤、起泡剤、発泡剤、消泡剤、保水剤、増粘
剤、セルフレベリング剤、防水剤、防錆剤、着色剤、防
黴剤、ひび割れ低減剤、高分子エマルション、その他界
面活性剤、水溶性高分子、膨張剤(材)、グラスファイ
バー、フライアッシュ、シリンダーアッシュ、タリンカ
ーアッシュ、ハスクアッシニ、高炉スラグ、シリカヒユ
ーム、シリカ粉末等との併用も可能である。In addition, other cement additives (materials) such as sustained release dispersants, AE water reducers, superplasticizers, high performance water reducers, retarders, early strength agents, accelerators, foaming agents, foaming agents, extinguishers, etc. Foaming agents, water retention agents, thickeners, self-leveling agents, waterproofing agents, rust prevention agents, coloring agents, antifungal agents, crack reducing agents, polymer emulsions, other surfactants, water-soluble polymers, swelling agents (materials) ), glass fiber, fly ash, cylinder ash, tallinker ash, husk assini, blast furnace slag, silica hume, silica powder, etc. can also be used in combination.
尚、本発明のセメント分散剤の重量平均分子量は、ゲル
パーミエイションクロマトグラフィ(GPC)を用い、
以下の条件により求tた。The weight average molecular weight of the cement dispersant of the present invention was determined using gel permeation chromatography (GPC).
t was determined under the following conditions.
カラム :親水性シリカ系でTSK gel G400
Sv4とTSK get G20003W (東ソー
■製)の2種類の組み合わせ
基準物質: GPC用ポリスチレンスルホン酸ナトリ
ウム標準試料(昭和電気工業
■製)
く註〉本明細書で用いている平均分子量は、基準物質に
対する換算分子量値で示している。Column: Hydrophilic silica-based TSK gel G400
Two types of combination reference materials: Sv4 and TSK get G20003W (manufactured by Tosoh): Sodium polystyrene sulfonate standard sample for GPC (manufactured by Showa Denki Kogyo) Note: The average molecular weight used in this specification is based on the reference material. Shown as converted molecular weight values.
溶離液 :0.1モル濃度塩化す)IJウム水
溶液とアセトニト
リルとを体積比で7:3
に混合
溶離液の流速 :0.8mf/分
カラム温度 :40℃
測定試料濃度 二0.2重量%
測定用試料注入量=10μm
流出液の検出器 :示差屈折計(昭和電気工業鞠製、5
E−51型)
〔実施例〕
以下に本発明の実施例を挙げ本発明を説明するが、本発
明はこれら実施例に限定されるものではない。Eluent: 0.1 molar concentration of IJ chloride aqueous solution and acetonitrile mixed at a volume ratio of 7:3 Eluent flow rate: 0.8 mf/min Column temperature: 40°C Measurement sample concentration: 20.2% by weight Amount of sample injected for measurement = 10 μm Effluent detector: Differential refractometer (manufactured by Showa Denki Kogyo Mari, 5
E-51 type) [Examples] The present invention will be described below with reference to Examples, but the present invention is not limited to these Examples.
尚、実施例及び比較例におけるコンクリートの配合およ
び使用材料は、次の第1表に示す通りである。The concrete formulations and materials used in the Examples and Comparative Examples are as shown in Table 1 below.
又、強度等のデータを比較検討するために、スランプ値
が21cmの一定値になるように配合を行った。In addition, in order to compare and study data such as strength, the composition was made so that the slump value was a constant value of 21 cm.
第1表
ここで、Cはセメント、普通ポルトランドセメント(比
重3.17) 、Sは細骨材、紀ノ用産砂(比重2.5
8.粗粒率FM 2.91 )、Gは粗骨材。Table 1 Where, C is cement, ordinary Portland cement (specific gravity 3.17), S is fine aggregate, Kinoyo sand (specific gravity 2.5)
8. Coarse particle ratio FM 2.91), G is coarse aggregate.
宝塚産砕石(比重2.61.粗粒率FM 6.98 >
、Wは水で、aはS+Gである。Crushed stone from Takarazuka (specific gravity 2.61. Coarse particle ratio FM 6.98 >
, W is water and a is S+G.
コンクリートの練り混ぜ方法
(方法−1)
セメント分散剤を予め練り混ぜ水に溶解したうえ、20
℃で1001の傾胴ミキサーを用いて501のコンクリ
ートを2分間混練した後、スランプと空気量を測定した
。スランプ試験はJIS^1101、空気量試験はJI
S^1128、圧縮試験はJIS^1108に各々準拠
して行った。Method of mixing concrete (Method-1) Mix a cement dispersant in advance and dissolve it in water,
After mixing 501 concrete for 2 minutes at 1001 °C using a tilting mixer, slump and air content were measured. Slump test is JIS^1101, air volume test is JI
S^1128 and compression tests were conducted in accordance with JIS^1108.
(方法−2)
セメント分散剤を練り水と別々に添加すること以外は、
方法−1と同様に行った。(Method-2) Except for adding the cement dispersant separately from the mixing water,
It was carried out in the same manner as method-1.
製造例
ナフタレンスルホン酸(253g)、98%濃硫酸(1
0g) 、水(50g)を500−フラスコに入れ、8
0℃に加温した。次に80〜90℃にて、37%ホルマ
リン(140g)を0.5時間で滴下し、その後90〜
100℃にて8時間反応させ共縮合物を得た(参考例−
9)。共縮合物を10%水溶液に希釈し、高分子分離膜
(旭化成工業□製、限外濾過モジュール^HL−101
0型、^CL−1010型)を用いて分画を行うことに
より、高縮合物を得た(参考例−1)。同様にして得ら
れた分画後の本発明品及び分画前のその比較品の組成を
第2表に示す。Production example Naphthalenesulfonic acid (253g), 98% concentrated sulfuric acid (1
0g), water (50g) was placed in a 500-flask, and 8
Warmed to 0°C. Next, at 80-90°C, 37% formalin (140g) was added dropwise over 0.5 hours, and then at 90-90°C.
A co-condensate was obtained by reacting at 100°C for 8 hours (Reference example-
9). The co-condensate was diluted to a 10% aqueous solution, and a polymer separation membrane (manufactured by Asahi Kasei Corporation, ultrafiltration module HL-101) was added.
A high condensate was obtained by performing fractionation using 0 type and CL-1010 type (Reference Example 1). Table 2 shows the compositions of the product of the present invention after fractionation and its comparative product before fractionation, which were obtained in the same manner.
第2表に示した本発明品及び比較品を分散剤として用い
て、
コンクリートでの練り混ぜ
試験を行った。A concrete mixing test was conducted using the products of the present invention and comparative products shown in Table 2 as dispersants.
試験条件を第3表に、 また試 験結果を第4表及び第5表に示す。The test conditions are shown in Table 3. Try again The test results are shown in Tables 4 and 5.
第
表
第
表
第
表
(続
き)
1)セメントに対する重量%
(固形分)
第
表
(続き)
第
表
1)セメントに対する重量%
(固形分)
第4表及び第5表の結果から、本発明品が超高減水領域
(W/C比=20%)での初期分散性の点で極めて優れ
た効果を与えることは明白である。Table 1 Table 1 (Continued) 1) Weight % relative to cement (Solid content) Table 1 (Continued) Table 1) Weight % relative to cement (Solid content) From the results in Tables 4 and 5, the products of the present invention It is clear that this provides an extremely excellent effect in terms of initial dispersibility in the ultra-high water reduction region (W/C ratio = 20%).
本発明によりW/C比が18%〜30%特に25%未満
の超高減水領域におけるコンクリートのワーカビリチを
大幅に改善することが可能になったことにより、本発明
に係るセメント分散剤は種々の用途に有利に用いること
ができる。The present invention has made it possible to significantly improve the workability of concrete in the ultra-high water reduction region where the W/C ratio is 18% to 30%, especially less than 25%.The cement dispersant according to the present invention can be used in various ways. It can be advantageously used for various purposes.
例えば30階以上の高層建築物や大深度空間の建築等の
高強度コンクリートや遠心成形コンクリート等の2次製
品分野の用途にも有効である。For example, it is also effective for use in the field of secondary products such as high-strength concrete and centrifugally formed concrete for high-rise buildings with 30 floors or more and buildings with deep spaces.
手続補正書(自発) 平成2年9月3日Procedural amendment (voluntary) September 3, 1990
Claims (1)
該縮合物の重量平均分子量が2万以上で且つ分子量1万
以下の縮合物の割合が全縮合物の50重量%未満である
ことを特徴とするセメント分散剤。 2、芳香族スルホン酸が、ナフタレンスルホン酸、アル
キルナフタレンスルホン酸、メラミンスルホン酸、フェ
ノールスルホン酸及びアニリンスルホン酸(スルファニ
ル酸)等の1種あるいは2種以上のスルホン酸から成る
請求項1記載のセメント分散剤。 3、芳香族スルホン酸ホルマリン縮合物が、ナフタレン
スルホン酸、メラミンスルホン酸、フェノールスルホン
酸及びアニリンスルホン酸(スルファニル酸)等の1種
あるいは2種以上のスルホン酸と、フェノールとの共縮
合物から成る請求項1記載のセメント分散剤。[Scope of Claims] 1. The main component is an aromatic sulfonic acid formalin condensate,
A cement dispersant characterized in that the weight average molecular weight of the condensate is 20,000 or more, and the proportion of the condensate having a molecular weight of 10,000 or less is less than 50% by weight of the total condensate. 2. The aromatic sulfonic acid according to claim 1, wherein the aromatic sulfonic acid is composed of one or more sulfonic acids such as naphthalene sulfonic acid, alkylnaphthalene sulfonic acid, melamine sulfonic acid, phenolsulfonic acid, and aniline sulfonic acid (sulfanilic acid). Cement dispersant. 3. The aromatic sulfonic acid formalin condensate is a co-condensate of one or more sulfonic acids such as naphthalene sulfonic acid, melamine sulfonic acid, phenolsulfonic acid and aniline sulfonic acid (sulfanilic acid) and phenol. The cement dispersant according to claim 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20652490A JPH0492841A (en) | 1990-08-03 | 1990-08-03 | Cement dispersant |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20652490A JPH0492841A (en) | 1990-08-03 | 1990-08-03 | Cement dispersant |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0492841A true JPH0492841A (en) | 1992-03-25 |
Family
ID=16524796
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20652490A Pending JPH0492841A (en) | 1990-08-03 | 1990-08-03 | Cement dispersant |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0492841A (en) |
-
1990
- 1990-08-03 JP JP20652490A patent/JPH0492841A/en active Pending
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