JP2009107916A - Concrete surface reinforcing agent, and concrete surface reinforcing method using the same - Google Patents
Concrete surface reinforcing agent, and concrete surface reinforcing method using the same Download PDFInfo
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- 239000012744 reinforcing agent Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 8
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 39
- 150000003839 salts Chemical class 0.000 claims abstract description 29
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000007864 aqueous solution Substances 0.000 claims abstract description 11
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 claims abstract description 6
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000001630 malic acid Substances 0.000 claims abstract description 6
- 235000011090 malic acid Nutrition 0.000 claims abstract description 6
- WHUUTDBJXJRKMK-UHFFFAOYSA-N Glutamic acid Natural products OC(=O)C(N)CCC(O)=O WHUUTDBJXJRKMK-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000004220 glutamic acid Substances 0.000 claims abstract description 5
- 235000013922 glutamic acid Nutrition 0.000 claims abstract description 5
- 150000001875 compounds Chemical class 0.000 claims abstract 4
- 238000005728 strengthening Methods 0.000 claims description 17
- 239000003795 chemical substances by application Substances 0.000 claims description 14
- PXEDJBXQKAGXNJ-QTNFYWBSSA-L disodium L-glutamate Chemical compound [Na+].[Na+].[O-]C(=O)[C@@H](N)CCC([O-])=O PXEDJBXQKAGXNJ-QTNFYWBSSA-L 0.000 claims description 9
- 235000013923 monosodium glutamate Nutrition 0.000 claims description 9
- 229940073490 sodium glutamate Drugs 0.000 claims description 9
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 8
- 239000004480 active ingredient Substances 0.000 claims description 4
- 239000000243 solution Substances 0.000 abstract 1
- 239000004570 mortar (masonry) Substances 0.000 description 11
- 235000015165 citric acid Nutrition 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000004568 cement Substances 0.000 description 6
- 239000003623 enhancer Substances 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000008119 colloidal silica Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 235000019353 potassium silicate Nutrition 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- WHUUTDBJXJRKMK-VKHMYHEASA-N L-glutamic acid Chemical compound OC(=O)[C@@H](N)CCC(O)=O WHUUTDBJXJRKMK-VKHMYHEASA-N 0.000 description 2
- 239000004111 Potassium silicate Substances 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 239000003429 antifungal agent Substances 0.000 description 2
- 229940121375 antifungal agent Drugs 0.000 description 2
- 239000003125 aqueous solvent Substances 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 150000001991 dicarboxylic acids Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- PAZHGORSDKKUPI-UHFFFAOYSA-N lithium metasilicate Chemical compound [Li+].[Li+].[O-][Si]([O-])=O PAZHGORSDKKUPI-UHFFFAOYSA-N 0.000 description 2
- 229910052912 lithium silicate Inorganic materials 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 239000003002 pH adjusting agent Substances 0.000 description 2
- 159000000001 potassium salts Chemical class 0.000 description 2
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 2
- 229910052913 potassium silicate Inorganic materials 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- RTBFRGCFXZNCOE-UHFFFAOYSA-N 1-methylsulfonylpiperidin-4-one Chemical compound CS(=O)(=O)N1CCC(=O)CC1 RTBFRGCFXZNCOE-UHFFFAOYSA-N 0.000 description 1
- GUUULVAMQJLDSY-UHFFFAOYSA-N 4,5-dihydro-1,2-thiazole Chemical class C1CC=NS1 GUUULVAMQJLDSY-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 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
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- JFCQEDHGNNZCLN-UHFFFAOYSA-N anhydrous glutaric acid Natural products OC(=O)CCCC(O)=O JFCQEDHGNNZCLN-UHFFFAOYSA-N 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 239000004599 antimicrobial Substances 0.000 description 1
- 239000006172 buffering agent Substances 0.000 description 1
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 description 1
- FNAQSUUGMSOBHW-UHFFFAOYSA-H calcium citrate Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O.[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O FNAQSUUGMSOBHW-UHFFFAOYSA-H 0.000 description 1
- 239000001354 calcium citrate Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 230000000855 fungicidal effect Effects 0.000 description 1
- 239000000417 fungicide Substances 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 150000003222 pyridines Chemical class 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000001509 sodium citrate Substances 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 235000013337 tricalcium citrate Nutrition 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
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- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/48—Macromolecular compounds
- C04B41/483—Polyacrylates
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/10—Compositions or ingredients thereof characterised by the absence or the very low content of a specific material
- C04B2111/1056—Silica-free or very low silica-content materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Aftertreatments Of Artificial And Natural Stones (AREA)
Abstract
Description
本発明は、コンクリート表面強化剤およびこれを用いるコンクリート表面強化方法に関する。 The present invention relates to a concrete surface reinforcing agent and a concrete surface reinforcing method using the same.
従来、コンクリートの表面強化剤としては、ケイ酸ナトリウム、ケイ酸カリウム、ケイ酸リチウム、コロイダルシリカ等のケイ酸塩と、有機酸を含む組成物が広く用いられてきた（特許文献１、２）。 Conventionally, as a surface reinforcing agent for concrete, a composition containing a silicate such as sodium silicate, potassium silicate, lithium silicate, colloidal silica, and an organic acid has been widely used (Patent Documents 1 and 2). .
しかしながら、このようなケイ酸塩を主成分とするコンクリート表面強化剤は、ケイ酸塩を利用するためコストが高く、また、均一に塗布することが難しいという問題を有していた。すなわち、ケイ酸ナトリウム、ケイ酸カリウム、ケイ酸リチウム等のケイ酸塩を有効成分とするコンクリート表面強化材は、塗布余剰分が膜状にならず結晶化するおそれががあるため、塗布後に水洗いが必要となるケースがあった。しかも、この水洗により生じる廃水は、強アルカリ性であるため、廃水処理が必要となっていた。 However, such a concrete surface strengthening agent containing silicate as a main component has a problem that it is expensive because it uses silicate and is difficult to apply uniformly. In other words, concrete surface reinforcements containing silicates such as sodium silicate, potassium silicate, and lithium silicate as active ingredients may be crystallized without surplus coating. There were cases where it was necessary. Moreover, since the wastewater generated by this washing is strongly alkaline, wastewater treatment has been required.
更に、ケイ酸塩系のコンクリート表面強化剤を塗布した施工面は、湿気や結露の影響による特有のぬめりを持っているため、その上に塗料を塗布することが難しいという問題があり、一度コンクリート表面強化剤を施工してしまうと、着色を目的とした塗布が困難となることもあった。 Furthermore, the construction surface coated with a silicate-based concrete surface strengthening agent has a specific slime due to the effects of moisture and condensation, so there is a problem that it is difficult to apply paint on it. If the surface reinforcing agent is applied, it may be difficult to apply for coloring.
そこで、より安価で、簡単にコンクリート表面を強化しうる方法が求められているが、現在までそのような方法は知られていない。
従って本発明は、簡単にかつ経済性良くコンクリート表面を強化する方法を提供することをその課題とするものである。 Accordingly, an object of the present invention is to provide a method for reinforcing a concrete surface easily and economically.
本発明者らは、上記課題を解決すべく鋭意検討を行っていた結果、ケイ酸塩成分を利用することなく、一見コンクリートを侵食すると思われる特定の有機酸でコンクリート表面を処理することにより、その表面を硬化させることができることを見出し、本発明を完成した。 As a result of intensive studies to solve the above-mentioned problems, the present inventors treated the concrete surface with a specific organic acid that seemed to erode concrete without using the silicate component, The inventors found that the surface can be cured and completed the present invention.
すなわち本発明は、有機ジカルボン酸またはその塩を有効成分とし、ケイ酸塩成分を含有しないコンクリート表面強化剤である。 That is, the present invention is a concrete surface reinforcing agent containing an organic dicarboxylic acid or a salt thereof as an active ingredient and containing no silicate component.
また本発明は、被処理コンクリート表面を、有機ジカルボン酸またはその塩の水性溶液で処理することを特徴とするコンクリート表面強化方法である。 Moreover, this invention is a concrete surface reinforcement | strengthening method characterized by processing the to-be-treated concrete surface with the aqueous solution of organic dicarboxylic acid or its salt.
本発明のコンクリート表面強化剤を使用することにより、水ガラス等のケイ酸塩成分を使用することなく簡単にコンクリート表面を強化することができ、コンクリートの摩耗を低減させることができる。 By using the concrete surface reinforcing agent of the present invention, the concrete surface can be easily reinforced without using a silicate component such as water glass, and the wear of the concrete can be reduced.
本発明のコンクリート表面強化剤の主成分である有機ジカルボン酸またはその塩としては、クエン酸、リンゴ酸、コハク酸、マロン酸、アジピン酸、グルタル酸、グルタミン酸等の有機ジカルボン酸や、それらのナトリウム塩、カリウム塩等の塩を挙げることができる。このうちでも、クエン酸、リンゴ酸、グルタミン酸や、そのナトリウム塩、カリウム塩等が好ましく、特にグルタミン酸ナトリウムは、コンクリートの表面強化効果に優れるとともに、塗布時の発泡や塗布面の荒れや変色が少なく、また白華の発生の無いものであり、かつｐＨが中性に近く安全性も高いために好ましい。 The organic dicarboxylic acid or salt thereof as the main component of the concrete surface reinforcing agent of the present invention includes citric acid, malic acid, succinic acid, malonic acid, adipic acid, glutaric acid, glutamic acid and other organic dicarboxylic acids and their sodium Examples thereof include salts such as salts and potassium salts. Of these, citric acid, malic acid, glutamic acid, and sodium salts and potassium salts thereof are preferable. Particularly, sodium glutamate is excellent in the surface strengthening effect of concrete and has less foaming or roughening or discoloration on the coated surface. Further, it is preferable since it does not generate white flower and has a pH close to neutral and high safety.
本発明のコンクリート表面強化剤は、上記の有機ジカルボン酸またはその塩を、適切な水性溶媒に溶解させた水性溶液の状態で使用されることが好ましい。この水性溶媒としては、水や水とメタノール、エタノール等の低級アルコールの混合溶媒を使用することができる。 The concrete surface reinforcing agent of the present invention is preferably used in the state of an aqueous solution in which the above organic dicarboxylic acid or a salt thereof is dissolved in an appropriate aqueous solvent. As this aqueous solvent, water or a mixed solvent of water and a lower alcohol such as methanol or ethanol can be used.
この際の有機ジカルボン酸またはその塩の濃度は、１ないし３０質量％（以下単に、「％」で示す）程度が好ましく、５ないし２０％がより好ましい。このうち、特に好ましい有機ジカルボン酸およびその塩の例としては、クエン酸が３〜９％で、クエン酸ナトリウムが３〜９％の組み合わせが挙げられる。 In this case, the concentration of the organic dicarboxylic acid or a salt thereof is preferably about 1 to 30% by mass (hereinafter simply referred to as “%”), and more preferably 5 to 20%. Of these, examples of particularly preferred organic dicarboxylic acids and salts thereof include a combination of 3 to 9% citric acid and 3 to 9% sodium citrate.
本発明のコンクリート表面強化剤には、有機ジカルボン酸またはその塩の他、必要に応じて他の任意成分を加えることができる。このような任意成分としては、コンクリートに対する浸透性を高めるための界面活性剤や、色素成分、香料成分等を挙げることができる。 In addition to the organic dicarboxylic acid or a salt thereof, other optional components can be added to the concrete surface reinforcing agent of the present invention as required. Examples of such optional components include surfactants for increasing permeability to concrete, pigment components, and fragrance components.
また、本発明のコンクリート表面強化剤は、そのｐＨが２ないし７程度の範囲で使用することが好ましいため、必要に応じてｐＨ調整剤や緩衝剤を加えても良い。この場合に使用されるｐＨ調整剤としては、酸性型のコロイダルシリカなどが好ましいものとして挙げられる。 Moreover, since it is preferable to use the concrete surface strengthening agent of this invention in the range whose pH is about 2 thru | or 7, you may add a pH adjuster and a buffering agent as needed. Preferred examples of the pH adjuster used in this case include acidic colloidal silica.
更に、本発明のコンクリート表面強化剤には有機ジカルボン酸またはその塩を含有しており、そのｐＨが２ないし７程度とした場合は、ｐＨが中性域に近付くほど、雑菌が繁殖しやすく長期の貯蔵安定性能が悪くなることがある。このような場合には、ピリジン系化合物やイソチアゾリン系化合物などの防腐防カビ剤などを加えても良い。 Furthermore, the concrete surface strengthening agent of the present invention contains an organic dicarboxylic acid or a salt thereof, and when the pH is about 2 to 7, as the pH gets closer to the neutral range, miscellaneous bacteria tend to propagate for a long time. The storage stability of the product may deteriorate. In such a case, antiseptic and antifungal agents such as pyridine compounds and isothiazoline compounds may be added.
以上説明した本発明のコンクリート表面強化剤を用いて、強化されるコンクリート表面としては、通常のコンクリート表面の他、セメントペースト、モルタル等を含むセメント硬化体表面が含まれる。本発明のコンクリート表面強化剤で、これらコンクリート表面を改質、強化するには、被処理コンクリート表面１ｍ２に対し、有機ジカルボン酸として、３ないし１００ｇ程度、好ましくは、１５ないし６０ｇ程度の量を使用すればよい。 The concrete surface to be reinforced using the concrete surface strengthening agent of the present invention described above includes a cement hardened body surface containing cement paste, mortar and the like in addition to a normal concrete surface. In order to modify and strengthen these concrete surfaces with the concrete surface strengthening agent of the present invention, the amount of the organic dicarboxylic acid is about 3 to 100 g, preferably about 15 to 60 g, per 1 m 2 of the concrete surface to be treated. Use it.
また、被処理コンクリート表面に対する処理方法も、一般的方法により、散布、噴霧あるいは塗布すれば良く、特に制約はない。 Moreover, the processing method with respect to the to-be-processed concrete surface should just be spread | sprayed, sprayed, or apply | coated by a general method, and there is no restriction | limiting in particular.
本発明のコンクリート表面強化剤により、被処理コンクリートの表面が強化される作用、機序は不明な部分が多いが、コンクリート中に成分として含まれるカルシウムとジカルボン酸が何らかの相互作用を起こし、これによりコンクリートが強化されるものと考えられている。たとえば、クエン酸を有効成分とするコンクリート表面強化剤を例に取ると、このクエン酸がコンクリート中のカルシウム分と反応し、生成した溶解性の低いクエン酸カルシウムがコンクリートの細孔を埋め、緻密にし、表面強度を向上させるものと考えられる。 The concrete surface strengthening agent of the present invention enhances the surface of the concrete to be treated, and there are many unclear parts, but calcium and dicarboxylic acid contained as components in the concrete cause some interaction, thereby It is believed that concrete will be reinforced. For example, in the case of a concrete surface strengthening agent containing citric acid as an active ingredient, this citric acid reacts with the calcium content in the concrete, and the resulting low-solubility calcium citrate fills the pores of the concrete and becomes dense. Therefore, it is considered that the surface strength is improved.
次に実施例を挙げ、本発明を更に詳しく説明するが、本発明はこれら実施例により何ら制約されるものではない。 EXAMPLES Next, although an Example is given and this invention is demonstrated in more detail, this invention is not restrict | limited at all by these Examples.
実 施 例 １
クエン酸をそれぞれ５％、１０％となるように水に溶解し、コンクリート表面強化剤（以下、「表面強化剤」という）１および２を調製した。また、リンゴ酸も同様に５％、１０％となるように水に溶解し、表面強化剤３および４を調製した。
Example 1
Citric acid was dissolved in water at 5% and 10%, respectively, to prepare concrete surface reinforcing agents (hereinafter referred to as “surface reinforcing agents”) 1 and 2. Similarly, malic acid was dissolved in water so as to be 5% and 10% to prepare surface reinforcing agents 3 and 4.
得られた表面強化剤１ないし４を用い、被処理モルタル板（セメント：細骨材＝１：２，水／セメント＝５０％のもの）を、それぞれ、３００ｍｌ／ｍ２となるように散布処理し、モルタル表面を強化した。 Using the obtained surface reinforcing agents 1 to 4, the mortar board to be treated (cement: fine aggregate = 1: 2, water / cement = 50%) is sprayed so as to be 300 ml / m 2 , respectively. And strengthened the mortar surface.
処理７日後に、その処理によるモルタル表面の硬化程度を、摩耗試験により調べた。この摩耗試験は、テーバー摩耗試験機を用い、摩耗輪ＧＣ−１５０Ｈに、荷重２５０ｇを加え、１００回回転させた後の摩耗減厚を測定することにより行った。この結果を表１に示す。 Seven days after the treatment, the degree of hardening of the mortar surface by the treatment was examined by an abrasion test. This wear test was performed by using a Taber wear tester and measuring the wear thickness reduction after applying a load of 250 g to the wear wheel GC-150H and rotating it 100 times. The results are shown in Table 1.
上記の表より明らかなように、ジカルボン酸を含有する表面強化剤１ないし４を使用することで明らかに摩耗減厚が認められ、しかもそれはジカルボン酸の配合量に比例していた。 As is apparent from the above table, wear thinning was clearly observed by using the surface reinforcing agents 1 to 4 containing dicarboxylic acid, which was proportional to the amount of dicarboxylic acid.
実 施 例 ２
グルタミン酸ナトリウムを１５％となるように水に溶解し、表面強化剤５を調製した。またクエン酸についても同様に１５％となるように水に溶解し表面強化剤６を調製した。これらのｐＨを測定したところ、グルタミン酸ナトリウム１５％水溶液が６．９５であり、クエン酸１５％水溶液は１．５７であった。
Example 2
Surface enhancer 5 was prepared by dissolving sodium glutamate in water to 15%. Similarly, citric acid was dissolved in water so as to be 15% to prepare surface enhancer 6. When these pH values were measured, the sodium glutamate 15% aqueous solution was 6.95, and the citric acid 15% aqueous solution was 1.57.
得られた表面強化剤５および６を用い、被処理モルタル板（セメント：細骨材＝１：２，水／セメント＝６０％のもの）を、それぞれ、２００ｍｌ／ｍ２となるように散布処理し、モルタル表面を強化した。 Using the surface strengthening agents 5 and 6 obtained, a mortar plate to be treated (cement: fine aggregate = 1: 2, water / cement = 60%) was sprayed to 200 ml / m 2 respectively. And strengthened the mortar surface.
処理１日後のモルタル表面の性状の変化を、目視により無処理のモルタルと比較して確認した。結果を表２および図１に示す。 The change in the properties of the surface of the mortar one day after the treatment was confirmed by visual comparison with the untreated mortar. The results are shown in Table 2 and FIG.
また、処理７日後に、その処理によるモルタル表面の硬化程度を、摩耗試験により調べた。ＪＩＳ Ｋ ７２０４に従って、テーバー摩耗試験機を用い、摩耗輪ＧＣ−１５０Ｈに、荷重２５０ｇを加え、１００回回転および２００回回転させた後の摩耗減厚を測定することにより行った。この結果を表３および図２に示す。 Further, after 7 days of treatment, the degree of hardening of the mortar surface by the treatment was examined by a wear test. According to JIS K7204, using a Taber abrasion tester, a load 250 g was applied to the wear wheel GC-150H, and the wear reduction after rotating 100 times and 200 times was measured. The results are shown in Table 3 and FIG.
表２および３から、グルタミン酸ナトリウム水溶液の方が、クエン酸水溶液よりも僅かであるが摩耗減厚量が少なく、表面状態がクエン酸水溶液と同等以上に向上することがわかった。また、グルタミン酸ナトリウム水溶液の方が塗布面の性状の変化も小さく、施工時の安定性により優れることが明らかとなった。 From Tables 2 and 3, it was found that the sodium glutamate aqueous solution was slightly less than the citric acid aqueous solution but had a smaller amount of wear reduction, and the surface state was improved to the same or higher level than the citric acid aqueous solution. In addition, it was revealed that the sodium glutamate aqueous solution has a smaller change in the properties of the coated surface and is superior in stability during construction.
実 施 例 ３
グルタミン酸ナトリウムを１５％となるように水に溶解し、表面強化剤５を調製した。また、同様にグルタミン酸ナトリウムを１５％となるように水に溶解し、なおかつ酸性型コロイダルシリカを５％、ピリジン系防カビ剤を１％溶解させた表面強化剤７を調製した。
Example 3
Surface enhancer 5 was prepared by dissolving sodium glutamate in water to 15%. Similarly, a surface strengthening agent 7 was prepared by dissolving sodium glutamate in water to 15%, dissolving 5% acidic colloidal silica, and 1% pyridine fungicide.
得られた表面強化剤５および７を塩化ビニル製の容器に移し、密栓して３０日間保存した後の貯蔵安定性を調べた。表面強化剤５および７の目視による確認結果を表４並びに図３および図４に示す。 The obtained surface reinforcing agents 5 and 7 were transferred to a container made of vinyl chloride, sealed, and stored for 30 days to examine the storage stability. The results of visual confirmation of the surface reinforcing agents 5 and 7 are shown in Table 4 and FIGS. 3 and 4.
表４並びに図３および図４から、酸性型コロイダルシリカおよび防カビ剤を添加した表面強化剤７の方が、無添加の表面強化剤５よりも貯蔵安定性が優れることが明らかとなった。 From Table 4 and FIG. 3 and FIG. 4, it became clear that the surface strengthening agent 7 to which acidic colloidal silica and an antifungal agent were added had better storage stability than the non-added surface reinforcing agent 5.
本発明の表面強化剤は、ジカルボン酸またはその塩という簡単な材料を用いながら、前記したように最高、対照の１３％にまで摩耗度を減少させることができるものである。 The surface strengthening agent of the present invention can reduce the degree of wear to a maximum of 13% of the control as described above while using a simple material such as dicarboxylic acid or a salt thereof.
従って、この表面強化剤を用いるコンクリート表面改質方法は、経済性および作業性の高い方法として、広く建築分野において利用できるものである。 Therefore, the concrete surface modification method using this surface strengthening agent can be widely used in the construction field as a method with high economic efficiency and workability.
Claims (8)
The method for reinforcing a concrete surface according to any one of claims 5 to 7, wherein the concentration of the organic dicarboxylic acid or a salt thereof in the aqueous solution is 1 to 30% by mass.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015195661A1 (en) * | 2014-06-16 | 2015-12-23 | Latitude 18, Inc | Inorganic-organic phosphate ceramics and coatings |
| JP2019034861A (en) * | 2017-08-10 | 2019-03-07 | ニチバン株式会社 | Masking agent for concrete, and method of repairing wall face |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2004002092A (en) * | 2002-05-30 | 2004-01-08 | Sho Bond Constr Co Ltd | Method of modifying hardened cement composition surface to improve adhesion of resin coating material and method of forming resin coating layer on the surface , and surface modifier used in the methods |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2004002092A (en) * | 2002-05-30 | 2004-01-08 | Sho Bond Constr Co Ltd | Method of modifying hardened cement composition surface to improve adhesion of resin coating material and method of forming resin coating layer on the surface , and surface modifier used in the methods |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015195661A1 (en) * | 2014-06-16 | 2015-12-23 | Latitude 18, Inc | Inorganic-organic phosphate ceramics and coatings |
| US20170121228A1 (en) * | 2014-06-16 | 2017-05-04 | Latitude 18, Inc. | Inorganic-organic phosphate ceramics and coatings |
| US10766821B2 (en) * | 2014-06-16 | 2020-09-08 | Latitude 18, Inc. | Inorganic-organic phosphate ceramics and coatings |
| US11396480B2 (en) | 2014-06-16 | 2022-07-26 | Latitude 18, Inc. | Inorganic-organic phosphate ceramics and coatings |
| JP2019034861A (en) * | 2017-08-10 | 2019-03-07 | ニチバン株式会社 | Masking agent for concrete, and method of repairing wall face |
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