JP2011079703A - Mortar or additive for concrete - Google Patents
Mortar or additive for concrete Download PDFInfo
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- JP2011079703A JP2011079703A JP2009233344A JP2009233344A JP2011079703A JP 2011079703 A JP2011079703 A JP 2011079703A JP 2009233344 A JP2009233344 A JP 2009233344A JP 2009233344 A JP2009233344 A JP 2009233344A JP 2011079703 A JP2011079703 A JP 2011079703A
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- reducing agent
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- 239000004567 concrete Substances 0.000 title claims abstract description 52
- 239000000654 additive Substances 0.000 title claims abstract description 38
- 230000000996 additive effect Effects 0.000 title claims abstract description 37
- 239000004570 mortar (masonry) Substances 0.000 title claims description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 37
- 239000000463 material Substances 0.000 claims abstract description 26
- 239000000843 powder Substances 0.000 claims abstract description 26
- 230000008719 thickening Effects 0.000 claims abstract description 15
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 10
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 7
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims abstract description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims abstract description 6
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 6
- 150000001340 alkali metals Chemical class 0.000 claims abstract description 6
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims abstract description 6
- 150000001412 amines Chemical class 0.000 claims abstract description 4
- -1 acrylate compound Chemical class 0.000 claims description 10
- 239000004480 active ingredient Substances 0.000 claims description 9
- 229920002472 Starch Polymers 0.000 claims description 6
- 125000004432 carbon atom Chemical group C* 0.000 claims description 6
- 235000019698 starch Nutrition 0.000 claims description 6
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 5
- 239000001913 cellulose Substances 0.000 claims description 5
- 229920002678 cellulose Polymers 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 3
- 229920002125 Sokalan® Polymers 0.000 claims description 2
- 238000002156 mixing Methods 0.000 abstract description 23
- 238000000926 separation method Methods 0.000 abstract description 13
- 150000001875 compounds Chemical class 0.000 abstract description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 abstract description 3
- 239000002562 thickening agent Substances 0.000 description 12
- 239000004568 cement Substances 0.000 description 11
- 239000000126 substance Substances 0.000 description 8
- 229920005646 polycarboxylate Polymers 0.000 description 7
- 238000004898 kneading Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 4
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229920005610 lignin Polymers 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 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 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- WURBVZBTWMNKQT-UHFFFAOYSA-N 1-(4-chlorophenoxy)-3,3-dimethyl-1-(1,2,4-triazol-1-yl)butan-2-one Chemical compound C1=NC=NN1C(C(=O)C(C)(C)C)OC1=CC=C(Cl)C=C1 WURBVZBTWMNKQT-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 235000010469 Glycine max Nutrition 0.000 description 2
- 244000068988 Glycine max Species 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- 229920001479 Hydroxyethyl methyl cellulose Polymers 0.000 description 1
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229920001222 biopolymer Polymers 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 239000001863 hydroxypropyl cellulose Substances 0.000 description 1
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 description 1
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 1
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 1
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 1
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 125000000843 phenylene group Chemical group C1(=C(C=CC=C1)*)* 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- 239000002893 slag Substances 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
本発明は、モルタルやコンクリートなどの混合性を良好にするための添加剤に関する。 The present invention relates to an additive for improving the mixing properties of mortar and concrete.
水の配合量を増加させずにモルタルやコンクリートの流動性を付与増大する手段として減水剤が使用されている。一方で、減水剤の使用は材料分離が起こり易くなるため、増粘性物質を併用し、材料分離を抑制することが行われている。増粘性物質はコンクリート混練物等に分散させ易く、軽微な混練操作で容易に配合効果が現れるので液状のものが使用されている（例えば、特許文献１参照）。液状の増粘性物質は、固形増粘成分を水などの溶媒に溶かしたものが多く、溶解度が概して低いため高濃度の液が得られ難いことから、有効な増粘成分量を確保しようとすると大量の溶媒混入を伴い、コンクリート中の単位水量の管理が繁雑になる。また昨今のモルタルやコンクリートの供給・使用形態で増加している所謂プレミックスタイプ（予混合粉末）を得るには適していない。これらの解消には粉末状の増粘性物質の使用が考えられるが、モルタルやコンクリート混練物に加えると増粘性粉末どうしが粘着し、塊状（玉状）化して余り分散せず、材料分離抑制効果が発揮し難かった。このため、減水剤粉末と増粘剤粉末の予混合物をコンクリート混練物に加え、増粘剤粉末の近傍に減水剤が存在することによって、増粘剤粉末の塊状化を防ぐことができることが知られている（例えば、特許文献２参照）。 Water reducing agents are used as a means for imparting and increasing the fluidity of mortar and concrete without increasing the amount of water. On the other hand, use of a water reducing agent makes it easy for material separation to occur, and therefore, a thickening substance is used in combination to suppress material separation. A thickening material is easily dispersed in a concrete kneaded material and the like, and a liquid compound is used because a blending effect is easily exhibited by a slight kneading operation (see, for example, Patent Document 1). Many liquid thickening substances are obtained by dissolving solid thickening ingredients in a solvent such as water. Since the solubility is generally low, it is difficult to obtain a high-concentration liquid. The management of the unit water volume in concrete becomes complicated with a large amount of solvent mixing. In addition, it is not suitable for obtaining a so-called premix type (premixed powder) that has been increasing in recent supply and use forms of mortar and concrete. To eliminate these problems, it is possible to use a powdery thickening substance. However, when added to mortar or concrete kneaded material, the thickening powders stick together and become agglomerated (ball-shaped) so that they do not disperse so much that they prevent material separation. It was difficult to demonstrate. For this reason, it is known that the premixture of the water reducing agent powder and the thickener powder is added to the concrete kneaded material, and the presence of the water reducing agent in the vicinity of the thickener powder prevents the thickener powder from agglomerating. (For example, refer to Patent Document 2).
しかるに、生コンクリートなどでは、リグニンスルホン酸系の減水剤が既調合されていることが多く、特許文献２で示されたような予混合物とリグニンスルホン酸系減水剤が併用された場合、減水剤の分散効果が阻害され、増粘剤粉末の塊状化防止が困難となるといった問題がある。
また、低温になるほどモルタルやコンクリート混練物の粘性が上昇するため、塊状化が顕著になってより大きな塊（玉）を形成し易くなり、均一分散性に欠ける。このため混合能力の弱い混練装置では低温下において特に十分均一な混合状態が得られ難いと言った問題があった。大量に減水剤を用いると、流動性は得られるが分離は起こり易くなり、分離を防ぐために増粘剤を添加すれば流動性は低下し、混合性が著しく低下する。
However, for ready-mixed concrete and the like, a lignin sulfonic acid-based water reducing agent is often prepared in advance, and when a premix as shown in Patent Document 2 and a lignin sulfonic acid-based water reducing agent are used in combination, the water reducing agent There is a problem that the dispersion effect is hindered and it becomes difficult to prevent thickening of the thickener powder.
Further, since the viscosity of the mortar and the concrete kneaded product increases as the temperature becomes lower, the agglomeration becomes conspicuous and it becomes easier to form a larger lump (ball) and the uniform dispersibility is lacking. For this reason, the kneading apparatus having a weak mixing ability has a problem that it is difficult to obtain a sufficiently uniform mixing state at a low temperature. If a water reducing agent is used in a large amount, fluidity can be obtained but separation easily occurs. If a thickener is added to prevent separation, the fluidity is lowered and the mixing property is remarkably lowered.
従って、本発明は、強力な材料分離抵抗性を示しつつ混合抵抗が抑制された良好な混合性を付与せしめることができる分散性に優れたモルタルやコンクリート用の添加剤、特に低温下での施工でも材料分離抵抗性を付与しつつ高粘化による混合抵抗性の増大を減じることのできるモルタルやコンクリート用の添加剤を提供することを課題とする。 Therefore, the present invention is an additive for mortar and concrete having excellent dispersibility that can give good mixing properties with suppressed mixing resistance while exhibiting strong material separation resistance, particularly construction at low temperatures. However, an object of the present invention is to provide an additive for mortar and concrete that can reduce the increase in mixing resistance due to increase in viscosity while imparting material separation resistance.
そこで本発明者は、種々検討した結果、減水剤として特定の構成単位を有する（メタ）アクリレート系化合物を有効成分とする粉末状添加剤を用い、これに粉末状増粘性物質を組み合せれば、低温下においても、優れた材料分離抵抗性及び混合性を奏するモルタル・コンクリート用添加剤が得られることを見出し、本発明を完成した。 Therefore, as a result of various studies, the present inventor used a powder additive containing a (meth) acrylate compound having a specific structural unit as a water reducing agent as an active ingredient, and combined this with a powder thickener, The inventors have found that an additive for mortar / concrete exhibiting excellent material separation resistance and mixing property can be obtained even at low temperatures, and completed the present invention.
すなわち、本発明は、（Ａ）分子内に少なくとも下記式（１）及び（２）で表される構成単位（式中、Ｒ1、Ｒ2及びＲ3は同一又は異なって水素原子又はメチル基を示し、Ｒ4は炭素数１〜５のアルキル基を示し、Ｍは水素原子、アルカリ金属、アルカリ土類金属、アンモニウム又は有機アミンを示し、Ｙは−ＣＨ2Ｏ−又は−ＣＯＯ−を示し、ｎは２０〜１０９の数を示す。）を有する（メタ）アクリレート系化合物を有効成分とするモルタル・コンクリート用減水剤粉末と、（Ｂ）粉末状増粘性物質とを含有するモルタル又はコンクリート用添加剤を提供するものである。 That is, the present invention relates to (A) a structural unit represented by at least the following formulas (1) and (2) in the molecule (wherein R 1 , R 2 and R 3 are the same or different and represent a hydrogen atom or a methyl group). R 4 represents an alkyl group having 1 to 5 carbon atoms, M represents a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium or an organic amine, and Y represents —CH 2 O— or —COO—. , N represents a number of 20 to 109.) A mortar-concrete water reducing agent powder containing (meth) acrylate-based compound as an active ingredient, and (B) a powdery thickening substance. An additive is provided.
本発明のモルタル又はコンクリート用添加剤を使用すれば、材料分離を抑制しつつ混合抵抗性の増加を抑えられるため均一な混練物を比較的軽微な混合操作でも容易に得ることが出来る。とりわけ低温で高流動性のモルタル又はコンクリートを得ようとするときに最適な添加剤である。 When the additive for mortar or concrete of the present invention is used, an increase in mixing resistance can be suppressed while suppressing material separation, so that a uniform kneaded material can be easily obtained even with a relatively light mixing operation. It is an optimal additive especially when trying to obtain mortar or concrete having high flowability at low temperatures.
本発明のモルタル又はコンクリート用添加剤に使用される（Ａ）モルタル・コンクリート用減水剤粉末の有効成分である（メタ）アクリレート系化合物は、前記式（１）及び式（２）の構成単位を含むものであり、構成単位（１）は４０〜８０モル％であることが好ましく、特に４５〜７５モル％であることが好ましく、構成単位（２）は、１種類の場合１〜４５モル％が好ましく、特に３〜４０モル％であることが好ましい。構成単位（１）中のＭは、水素原子、リチウムやナトリウム等のアルカリ金属、カルシウムやマグネシウム等のアルカリ土類金属、アンモニウム又はエタノールアミン等のアルカノールアミン等が挙げられる。また、構成単位（２）中のｎは、２０〜１０９の数を示すが、ｎが２０未満であると粉末化が困難となり、ガム状になることがある。またｎが１０９を超えると、分散能が低下し、モルタルやコンクリートの流動性が低下するので好ましくない。特に好ましいｎの範囲は２５〜９０である。Ｒ4は炭素数１〜５のアルキル基であれば限定されないが、好ましくは、炭素数１〜３のアルキル基、例えばメチル基、エチル基、ｎ−プロピル基又はｉ−プロピル基が挙げられる。 The (meth) acrylate compound which is an active ingredient of the water reducing agent powder for mortar / concrete used in the mortar or concrete additive of the present invention comprises the structural units of the above formulas (1) and (2). The structural unit (1) is preferably 40 to 80 mol%, particularly preferably 45 to 75 mol%, and the structural unit (2) is 1 to 45 mol% in the case of one kind. It is preferable that it is 3-40 mol% especially. Examples of M in the structural unit (1) include a hydrogen atom, an alkali metal such as lithium or sodium, an alkaline earth metal such as calcium or magnesium, an alkanolamine such as ammonium or ethanolamine, and the like. In addition, n in the structural unit (2) represents the number of 20 to 109, but if n is less than 20, powdering becomes difficult and may become a gum. Moreover, when n exceeds 109, since dispersibility falls and the fluidity | liquidity of mortar or concrete falls, it is unpreferable. The particularly preferable range of n is 25 to 90. R 4 is not limited as long as it is an alkyl group having 1 to 5 carbon atoms, and preferably an alkyl group having 1 to 3 carbon atoms such as a methyl group, an ethyl group, an n-propyl group, or an i-propyl group.
なお、構成単位（２）は、Ｙが−ＣＨ２Ｏ−と−ＣＯＯ−の２種類が示されるが、その何れか一方又は両方が存在するものであっても良い。両方が存在する場合は、Ｙが−ＣＯＯ−である（２）が１〜３０モル％で、Ｙが−ＣＨ2Ｏ−である（２）が１〜３０モル％であり、特にＹが−ＣＯＯ−である（２）が５〜２５モル％で、Ｙが−ＣＨ２Ｏ−である（２）が３〜２５モル％であるものが好ましい。また、（２）が混在する場合、何れか一方の構成単位のｎが２０〜１０９の範囲であればよい。このような分子内に式（１）及び（２）で表される構成単位を有しないものにあっては、例えモルタルやコンクリート混練物で優れた減水作用を呈するものであっても、使用量が増すとモルタルやコンクリートの凝結が遅延化して分離水が発生する虞が生じたり、例えば５℃程度の低温では溶解度の大幅低下や混練物の粘性増大によって混練物中での分散化が特に鈍くなり、相当強力な混合操作を行わないと所望の減水作用が得られないことがあるので好ましくない。 In the structural unit (2), two types of Y, —CH 2 O— and —COO—, are shown, and either or both of them may be present. When both are present, Y is —COO— (2) is 1 to 30 mol%, Y is —CH 2 O— (2) is 1 to 30 mol%, and particularly Y is — Preferred are those in which (2) being COO— is 5-25 mol% and (2) where Y is —CH 2 O— is 3-25 mol%. Moreover, when (2) is mixed, n of any one structural unit should just be the range of 20-109. For those that do not have the structural units represented by the formulas (1) and (2) in the molecule, even if the mortar or concrete kneaded material exhibits an excellent water-reducing action, the amount used When the slag increases, the setting of mortar and concrete may be delayed, and separation water may be generated. For example, at a low temperature of about 5 ° C., the dispersibility in the kneaded material is particularly slow due to a significant decrease in solubility and an increase in the viscosity of the kneaded material. Therefore, the desired water reducing action may not be obtained unless a considerably strong mixing operation is performed.
本発明のモルタル又はコンクリート用添加剤に使用される有効成分（メタ）アクリレート系化合物は、さらに次に示す構成単位（３）及び（４）の１又は２以上を有するものであっても良い。 The active ingredient (meth) acrylate compound used in the mortar or concrete additive of the present invention may further have one or more of the following structural units (3) and (4).
（式中、Ｒ5は水素原子又はメチル基を示し、Ｒ6は炭素数１〜５のアルキル基を示し、Ｘは−ＳＯ3Ｍ2又は−Ｏ−Ｐｈ−ＳＯ3Ｍ2（ここで、Ｍ2は水素原子、アルカリ金属、アルカリ土類金属、アンモニウム又は有機アミンを示し、Ｐｈはフェニレン基を示す）を示す） (In the formula, R 5 represents a hydrogen atom or a methyl group, R 6 represents an alkyl group having 1 to 5 carbon atoms, and X represents —SO 3 M 2 or —O—Ph—SO 3 M 2 (wherein M 2 represents a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium or an organic amine, and Ph represents a phenylene group)
上記構成単位（３）及び（４）においてＲ6で示される炭素数１〜５のアルキル基としては、メチル基、エチル基、ｎ−プロピル基又はｉ−プロピル基が挙げられ、Ｍ2としては、水素原子、リチウムやナトリウム等のアルカリ金属、カルシウムやマグネシウム等のアルカリ土類金属、アンモニウム又はエタノールアミン等のアルカノールアミン等が挙げられる。構成単位（３）は２〜２５モル％であることが好ましく、特に５〜２０モル％であることが好ましい。構成単位（４）は３〜２０モル％であることが好ましく、特に５〜１５モル％であることが好ましい。なお構成単位のモル％は（１）〜（４）の全構成単位の合計を１００モル％とした場合のそれぞれの構成単位のモル％を示す。 Examples of the alkyl group having 1 to 5 carbon atoms represented by R 6 in the structural units (3) and (4), a methyl group, an ethyl group, and a n- propyl or i- propyl group, a M 2 is , Hydrogen atoms, alkali metals such as lithium and sodium, alkaline earth metals such as calcium and magnesium, alkanolamines such as ammonium and ethanolamine, and the like. The structural unit (3) is preferably 2 to 25 mol%, particularly preferably 5 to 20 mol%. The structural unit (4) is preferably from 3 to 20 mol%, particularly preferably from 5 to 15 mol%. In addition, mol% of a structural unit shows mol% of each structural unit when the sum total of all the structural units of (1)-(4) is 100 mol%.
構成単位（１）〜（４）において、Ｒ1〜Ｒ6はメチル基が特に好ましく、Ｍとしては、特にナトリウムが好ましく、Ｘとしては、−ＳＯ3Ｎａが好ましい。また、減水剤の有効成分としては、構成単位（１）〜（４）の全てを含むものが好ましく、この構成単位（２）は、１種でも２種でも良い。本発明添加剤に使用される有効成分（メタ）アクリレート系化合物の数平均分子量はＧＰＣ法によるポリエチレングリコール換算で、２０００〜５００００の範囲内のものが好ましく、特に３５００〜３００００のものが好ましい。 In the structural units (1) to (4), R 1 to R 6 are particularly preferably a methyl group, M is particularly preferably sodium, and X is preferably —SO 3 Na. Moreover, what contains all the structural units (1)-(4) as an active ingredient of a water reducing agent is preferable, and this structural unit (2) may be 1 type or 2 types. The number average molecular weight of the active ingredient (meth) acrylate compound used in the additive of the present invention is preferably in the range of 2000 to 50000, particularly preferably 3500 to 30000 in terms of polyethylene glycol by GPC method.
本発明のモルタル又はコンクリート用添加剤に使用される（メタ）アクリレート系化合物を有効成分とする減水剤粉末の作製は、例えば、少なくとも上記の（メタ）アクリレート系化合物に水を加えてなる混合物を熱風式乾燥装置又は伝導電熱式乾燥装置等で乾燥粉末化するか減圧下で加熱混練撹拌により粉末化する。また、該減水剤粉末には、本発明の効果を阻害させない限り、上記（メタ）アクリレート系化合物以外の成分が含まれていても良い。 Preparation of a water reducing agent powder containing a (meth) acrylate compound used as an active ingredient for the mortar or concrete additive of the present invention is, for example, a mixture obtained by adding water to at least the above (meth) acrylate compound. Dry powdered with a hot air drying device or conduction electric heating drying device or powdered by heating, kneading and stirring under reduced pressure. Further, the water reducing agent powder may contain components other than the (meth) acrylate-based compound as long as the effects of the present invention are not inhibited.
本発明のモルタル又はコンクリート用添加剤に使用する減水剤粉末は分級操作等を施して、粒径３００μｍ以下とすることが、増粘成分粉末どうしの接着が進行する前に、減水剤が混練物中に十分溶解でき、特に低温ではこのような現象が強く現れるので好ましい。 The water reducing agent powder used in the mortar or concrete additive of the present invention is subjected to a classification operation or the like, so that the particle size is 300 μm or less, and the water reducing agent is kneaded before the adhesion between the thickening component powders proceeds. This is preferable because it can be sufficiently dissolved therein, and such a phenomenon appears particularly at low temperatures.
また、本発明のモルタル又はコンクリート用添加剤に使用する（Ｂ）増粘性物質の粉末は、成分的には特に限定されるものではないが、例えはセルロース誘導体、アクリル誘導体、澱粉等の多糖類、ウェラガムやソヤガム等のバイオポリマーを挙げることができる。好ましくは水溶性の成分からなる増粘性物質がモルタル・コンクリート混練物中に短時間で溶解できるので良い。より好ましい例としては、ヒドロキシエチルセルロース、ヒドロキシプロピルセルロース、ヒドロキシエチルメチルセルロース、ヒドロキシプロピルメチルセルロース、カルボキシメチルセルロース等の水溶性セルロース誘導体；スターチエーテル等のデンプン類；水溶性蛋白質類；水溶性（メタ）アクリル酸系重合体；ウェラガム、ソヤガム等の天然高分子等が挙げられる。このうち、水溶性セルロース誘導体、デンプン類及び水溶性（メタ）アクリル酸系重合体から選ばれる１種以上がより好ましい。 Further, the (B) thickening substance powder used in the mortar or concrete additive of the present invention is not particularly limited in terms of ingredients. For example, polysaccharides such as cellulose derivatives, acrylic derivatives, and starches. And biopolymers such as wera gum and soya gum. Preferably, a thickening substance composed of a water-soluble component can be dissolved in the mortar / concrete kneaded material in a short time. More preferable examples include water-soluble cellulose derivatives such as hydroxyethylcellulose, hydroxypropylcellulose, hydroxyethylmethylcellulose, hydroxypropylmethylcellulose and carboxymethylcellulose; starches such as starch ether; water-soluble proteins; water-soluble (meth) acrylic acid type Polymers: natural polymers such as wera gum and soya gum. Among these, at least one selected from water-soluble cellulose derivatives, starches, and water-soluble (meth) acrylic acid polymers is more preferable.
また、増粘性物質の粉末は特には制限されないが、分級操作等を施して、粒径１０００μｍ以下とすることが短時間の混合でも材料分離抑制作用が得られ易くなるので好ましい。 The powder of the thickening substance is not particularly limited, but it is preferable to perform a classification operation or the like so that the particle size is 1000 μm or less because a material separation suppressing action can be easily obtained even in a short time mixing.
また、本発明のモルタル又はコンクリート用添加剤は、前記（Ａ）（メタ）アクリレート系化合物を有効成分とする減水剤粉末と前記（Ｂ）増粘性物質粉末の含有量が、重量比で（Ａ）／（Ｂ）＝１〜７であるものが好ましく、（Ａ）／（Ｂ）＝２〜６が特に好ましい。重量比（Ａ）／（Ｂ）が１未満では、減水成分不足となり混合抵抗性を減少し難くなるため適当ではなく、重量比（Ａ）／（Ｂ）が７を超えると材料分離抑制作用が得られ難くなるため適当ではない。 Further, the additive for mortar or concrete of the present invention is such that the content of the water reducing agent powder (A) (meth) acrylate compound as an active ingredient and the (B) thickening substance powder is (A ) / (B) = 1 to 7 is preferable, and (A) / (B) = 2 to 6 is particularly preferable. If the weight ratio (A) / (B) is less than 1, it is not appropriate because the water-reducing component is insufficient and it is difficult to reduce the mixing resistance. Since it becomes difficult to obtain, it is not suitable.
また、本発明のモルタル又はコンクリート用添加剤は、例えば５℃程度の低温で施工するモルタル・コンクリートの添加剤として使用すると、低温下での混合性低下をかなり抑制できるので、このような低温下でも含有成分が均一に分散された混練物を得る上でも、また高い流動性の混練物を得る上でも好適である。 In addition, when the additive for mortar or concrete of the present invention is used as an additive for mortar and concrete applied at a low temperature of about 5 ° C., for example, the mixing loss at a low temperature can be considerably suppressed. However, it is suitable for obtaining a kneaded product in which the contained components are uniformly dispersed and for obtaining a kneaded product having high fluidity.
本発明のモルタル又はコンクリート用添加剤のモルタルやコンクリート中への添加量としては、モルタル・コンクリート中のセメントや骨材等の固形分総質量（本添加剤を除く。）の約０．００５〜０．１％に相当する重量が好ましい。より好ましくは、５℃程度の低温施工用モルタル・コンクリートであっては０．０１〜０．１％、それ以外の常温や高温施工用モルタル・コンクリートであっては０．００５〜０．０８％が良い。約０．００５％未満では添加効果が発現され難くなり、また約０．１％を超えると混合抵抗性が上昇することがあるため適当ではない。 The amount of the mortar or concrete additive of the present invention added to the mortar or concrete is about 0.005 to the total solid mass (excluding the additive) of cement, aggregate, etc. in the mortar / concrete. A weight corresponding to 0.1% is preferred. More preferably, it is 0.01 to 0.1% for low temperature construction mortar and concrete at about 5 ° C., and 0.005 to 0.08% for other room temperature and high temperature construction mortar and concrete. Is good. If it is less than about 0.005%, the effect of addition becomes difficult to be exhibited, and if it exceeds about 0.1%, the mixing resistance may increase, which is not suitable.
また、本発明のモルタル又はコンクリート用添加剤を添加使用するモルタルやコンクリートの組成等は特には限定されない。また、本添加剤を使用するモルタルやコンクリートの製造方法も特に限定されるものではないが、本添加剤は予めセメントや骨材等の配合原料と共にプレミックス化しておいても良いし、モルタルやコンクリートの注水時に本添加剤を添加して混練しても良い。また、本添加剤使用のモルタル・コンクリートの混合・混練操作は、例えば二軸ミキサ、パン型ミキサ、ホバートミキサ、ハンドミキサ等を用いて、当該使用装置の通常の混合・混練力で容易行うことができる他、特にアジテーター車などの比較的軽微な混練力しか出せないような装置であっても十分な混合性を確保することが出来るので好適である。 In addition, the composition of the mortar or concrete to which the mortar or concrete additive of the present invention is added is not particularly limited. Further, the method for producing mortar and concrete using the additive is not particularly limited, but the additive may be premixed with a blending raw material such as cement or aggregate in advance, This additive may be added and kneaded when water is poured into the concrete. In addition, mixing and kneading operations of mortar / concrete using this additive can be easily carried out with the normal mixing and kneading force of the equipment in use, for example, using a biaxial mixer, pan-type mixer, Hobart mixer, hand mixer, etc. In addition, even a device capable of producing only a relatively light kneading force, such as an agitator vehicle, is preferable because sufficient mixing properties can be ensured.
以下、実施例により本発明を具体的に詳しく説明するが、本発明はここに表す実施例に限定されるものではない。 EXAMPLES Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited to the examples shown here.
＜実験１＞
本試験で用いた、減水剤と増粘剤を以下に示す。
（１）減水剤（減水剤Ｊは液状、残りは全て粉末状）
減水剤Ａ；試製造品Ａ（ポリカルボン酸塩系）（特許公報第３５７８９１４号の実施例１で記載された粉末セメント分散剤。成分・製法とも当該実施例記載に準じる。）
減水剤Ｂ；試製造品Ｂ（ポリカルボン酸塩系）（特許公報第３５７８９１４号の実施例２で記載された粉末セメント分散剤。成分・製法とも当該実施例記載に準じる。）
減水剤Ｃ；マイティ２１Ｐ（花王社製、ポリカルボン酸塩系）
減水剤Ｄ；ＭＥＬＦＬＵＸ ＰＰ１００Ｆ（ＢＡＳＦジャパン社製、ポリカルボン酸塩系）
減水剤Ｅ；ＭＥＬＦＬＵＸ ＡＰ１０１Ｆ（ＢＡＳＦジャパン社製、ポリカルボン酸塩系）
減水剤Ｆ；ＭＥＬＦＬＵＸ ２６５１Ｆ（ＢＡＳＦジャパン社製、ポリカルボン酸塩系）
減水剤Ｇ；ＭＥＬＦＬＵＸ ５５８１Ｆ（ＢＡＳＦジャパン社製、ポリカルボン酸塩系）
減水剤Ｈ；マイティ１００（花王社製、ナフタレン系）
減水剤Ｉ；メルメントＦ１０Ｍ（ＢＡＳＦジャパン社製、メラミン系）
減水剤Ｊ；減水剤Ａを蒸留水に溶解させたもの（減水剤Ａ：蒸留水＝４０：１００（重量比））
<Experiment 1>
The water reducing agent and thickener used in this test are shown below.
(1) Water reducing agent (Water reducing agent J is liquid, the rest are all powder)
Water-reducing agent A: Trial product A (polycarboxylate-based) (powder cement dispersant described in Example 1 of Japanese Patent Publication No. 3578914. The components and production methods are the same as those described in the examples.)
Water reducing agent B: Trial product B (polycarboxylate-based) (powder cement dispersant described in Example 2 of Japanese Patent Publication No. 3578914. Both components and manufacturing method are in accordance with the description of the Example)
Water reducing agent C: Mighty 21P (manufactured by Kao Corporation, polycarboxylate type)
Water reducing agent D: MELFLUX PP100F (manufactured by BASF Japan, polycarboxylate)
Water reducing agent E; MELFLUX AP101F (manufactured by BASF Japan, polycarboxylate)
Water reducing agent F; MELFLUX 2651F (manufactured by BASF Japan, polycarboxylate type)
Water reducing agent G; MELFLUX 5581F (manufactured by BASF Japan, polycarboxylate)
Water reducing agent H; Mighty 100 (Kao Corporation, naphthalene)
Water reducing agent I: Melment F10M (manufactured by BASF Japan, melamine)
Water reducing agent J: Water reducing agent A dissolved in distilled water (water reducing agent A: distilled water = 40: 100 (weight ratio))
減水剤Ｃ〜Ｇ：構成単位（２）を満たさない。また構成単位（３）を有していない。 Water reducing agents C to G: The structural unit (2) is not satisfied. Moreover, it does not have a structural unit (3).
（２）増粘剤粉末
増粘剤Ａ；メトローズ（信越化学工業社製、セルロース系）
増粘剤Ｂ；ＴＮＳ（太平洋マテリアル社製、アクリル系）
増粘剤Ｃ；Ｃａｓｕｃｏｌ（Ａｖｅｂｅ社製、デンプン系）
(2) Thickener powder Thickener A; Metroles (manufactured by Shin-Etsu Chemical Co., Ltd., cellulose)
Thickener B: TNS (manufactured by Taiheiyo Material, acrylic)
Thickener C: Casucol (Avebe, starch-based)
以下に示す材料を用い、表１の配合のモルタルをＪＩＳ Ｒ ５２０１「セメントの物理試験方法」に従い、ホバートミキサーを用いて５℃環境下で練り混ぜた。
さらに、モルタル上に、表２の配合の添加剤１〜１０を各１．２ｇ添加して、ホバートミキサーで低速で６０秒間回転させた後、全量を５ｍｍの篩いを通し、篩上に少しでも塊（玉）が認められたものを×、塊（玉）が全く認められなかったものを○とした。
尚、該添加剤は、５０ｋｇ/バッチでレ−ディゲ社製レーディゲミキサにて混合し、試料とした。
表３に試験結果をまとめて示す。実施例１〜４では、全く塊（玉）は認められなかったのに対し、比較例１〜５、８では篩上に塊（玉）の発生が認められた。特に比較例８では、添加剤１２をレーディゲミキサで均一に混合することができず、モルタルに添加した際も篩上に多くの塊（玉）が認められた。また、比較例６、７は、流動性が不足し、モルタル自体を篩に通すことが困難であった。
Using the materials shown below, a mortar having the composition shown in Table 1 was kneaded in a 5 ° C. environment using a Hobart mixer in accordance with JIS R 5201 “Cement physical test method”.
Further, 1.2 g of each of the additives 1 to 10 having the composition shown in Table 2 was added to the mortar, and after rotating for 60 seconds at a low speed with a Hobart mixer, the whole amount was passed through a 5 mm sieve, and even a little over the sieve. The case where a lump (ball) was observed was rated as x, and the case where a lump (ball) was not recognized at all was marked as ◯.
The additive was mixed at a rate of 50 kg / batch using a Leedige mixer manufactured by Leedge and used as a sample.
Table 3 summarizes the test results. In Examples 1 to 4, no lumps (balls) were observed, whereas in Comparative Examples 1 to 5 and 8, generation of lumps (balls) was observed on the sieve. In particular, in Comparative Example 8, the additive 12 could not be uniformly mixed with a Laedige mixer, and many lumps (balls) were observed on the sieve when added to the mortar. In Comparative Examples 6 and 7, the fluidity was insufficient and it was difficult to pass the mortar itself through a sieve.
（３）モルタル材料
セメント；普通ポルトランドセメント（太平洋セメント社製）
細骨材；ＪＩＳ Ｒ ５２０１「セメント強さ試験用標準砂」（社団法人セメント協会製）
水；水道水
ＡＥ減水剤；ポゾリスＮｏ．８（ＢＡＳＦポゾリス社製、リグニンスルホン酸系）
(3) Mortar material Cement: Ordinary Portland cement (manufactured by Taiheiyo Cement)
Fine aggregate: JIS R 5201 "Standard sand for cement strength test" (Cement Association)
Tap water AE water reducing agent; 8 (BASF Pozzolith, lignin sulfonic acid)
＜実験２＞
以下の材料を用い、表４の配合の生コンクリートをパン型ミキサ（５０リットル）を用いて、５℃恒温度試験室内で３０リットル／バッチで練り混ぜ、全量を小型模擬ミキサー車（ドラム長さ７０ｃｍ、最大内径４０ｃｍ、最小内径２０ｃｍ（開口部）、内容積約５０リットル）に積み込み、これに表３の添加剤１粉末２０ｇを投入した後に、６０秒間攪拌混合して増粘剤添加コンクリートを作成した。
添加剤投入前のスランプは１４ｃｍであったのに対し、本発明の添加剤投入後のスランプは２１ｃｍと流動性の改善が認められた。また、目視で塊（玉）の有無並びに材料分離の有無を観察したが、いずれも認められなかった。
<Experiment 2>
Using the following materials, mix the ready-mixed concrete in Table 4 with a pan mixer (50 liters) in a constant temperature test chamber at 5 ° C at 30 liters / batch. 70 cm, maximum inner diameter 40 cm, minimum inner diameter 20 cm (opening), internal volume about 50 liters), and after adding 20 g of additive 1 powder of Table 3 to this, stirring and mixing for 60 seconds, the thickener added concrete Created.
The slump before the addition of the additive was 14 cm, whereas the slump after the addition of the additive of the present invention was 21 cm, indicating an improvement in fluidity. Moreover, although the presence or absence of the lump (ball) and the presence or absence of material separation were observed visually, neither was recognized.
（４）コンクリート用材料
セメント；普通ポルトランドセメント（太平洋セメント社製）
細骨材；石灰砕砂（北海道峩朗産）
粗骨材；石灰砕石（北海道峩朗産）
水；水道水
ＡＥ減水剤；ポゾリスＮｏ．８（ＢＡＳＦポゾリス社製、リグニンスルホン酸系）
ＡＥ剤；マイクロエア１０１（ＢＡＳＦポゾリス社製）
(4) Concrete materials Cement: Ordinary Portland cement (manufactured by Taiheiyo Cement)
Fine aggregate: Crushed lime sand (from Goro, Hokkaido)
Coarse aggregate: Limestone (from Goro, Hokkaido)
Tap water AE water reducing agent; 8 (BASF Pozzolith, lignin sulfonic acid)
AE agent: Micro Air 101 (BASF Pozzolith)
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009233344A JP5562607B2 (en) | 2009-10-07 | 2009-10-07 | Additive for mortar or concrete |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009233344A JP5562607B2 (en) | 2009-10-07 | 2009-10-07 | Additive for mortar or concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2011079703A true JP2011079703A (en) | 2011-04-21 |
| JP5562607B2 JP5562607B2 (en) | 2014-07-30 |
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| JP2009233344A Active JP5562607B2 (en) | 2009-10-07 | 2009-10-07 | Additive for mortar or concrete |
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| JP (1) | JP5562607B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190060167A (en) * | 2017-11-24 | 2019-06-03 | 주식회사 티에스씨 | By-product of sugars for concrete admixture, method for preparing the same and cement composition containing the same |
| CN111647162A (en) * | 2020-06-01 | 2020-09-11 | 内蒙古际丰建材有限公司 | Starch modified polycarboxylic acid macromonomer and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000034153A (en) * | 1998-07-21 | 2000-02-02 | Taiheiyo Cement Corp | Cement-based self-leveling composition |
| JP2002160954A (en) * | 2000-09-14 | 2002-06-04 | Kao Corp | Cement dispersing agent |
-
2009
- 2009-10-07 JP JP2009233344A patent/JP5562607B2/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000034153A (en) * | 1998-07-21 | 2000-02-02 | Taiheiyo Cement Corp | Cement-based self-leveling composition |
| JP2002160954A (en) * | 2000-09-14 | 2002-06-04 | Kao Corp | Cement dispersing agent |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190060167A (en) * | 2017-11-24 | 2019-06-03 | 주식회사 티에스씨 | By-product of sugars for concrete admixture, method for preparing the same and cement composition containing the same |
| KR101989401B1 (en) | 2017-11-24 | 2019-06-14 | 주식회사 티에스씨 | By-product of sugars for concrete admixture, method for preparing the same and cement composition containing the same |
| CN111647162A (en) * | 2020-06-01 | 2020-09-11 | 内蒙古际丰建材有限公司 | Starch modified polycarboxylic acid macromonomer and preparation method thereof |
| CN111647162B (en) * | 2020-06-01 | 2022-02-01 | 内蒙古际丰建材有限公司 | Starch modified polycarboxylic acid macromonomer and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5562607B2 (en) | 2014-07-30 |
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