JP3282393B2 - Manufacturing method of cement concrete products - Google Patents
Manufacturing method of cement concrete productsInfo
- Publication number
- JP3282393B2 JP3282393B2 JP19079394A JP19079394A JP3282393B2 JP 3282393 B2 JP3282393 B2 JP 3282393B2 JP 19079394 A JP19079394 A JP 19079394A JP 19079394 A JP19079394 A JP 19079394A JP 3282393 B2 JP3282393 B2 JP 3282393B2
- Authority
- JP
- Japan
- Prior art keywords
- cement concrete
- water
- concrete product
- concentration
- nonionic surfactant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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
- 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
- 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
- C04B41/50—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 inorganic materials
- C04B41/5007—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 inorganic materials with salts or salty compositions, e.g. for salt glazing
- C04B41/5014—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 inorganic materials with salts or salty compositions, e.g. for salt glazing containing sulfur in the anion, e.g. sulfides
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/40—Surface-active agents, dispersants
- C04B2103/406—Surface-active agents, dispersants non-ionic
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Aftertreatments Of Artificial And Natural Stones (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、セメントコンクリート
製品の表面にアルカリ分が溶出するのを防止することが
できるセメントコンクリート製品の製造法に関する。さ
らに詳しくは本発明は、セメントコンクリート製品の表
面を水溶性金属硫酸塩及びノニオン系界面活性剤を含有
する水溶液で処理することによってセメントコンクリー
ト製品の表面からアルカリ分が溶出するのを防止するこ
とができるセメントコンクリート製品の製造法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a cement concrete product capable of preventing alkali from being eluted on the surface of the cement concrete product. More specifically, the present invention can prevent elution of alkali components from the surface of a cement concrete product by treating the surface of the cement concrete product with an aqueous solution containing a water-soluble metal sulfate and a nonionic surfactant. The present invention relates to a method for producing a cement concrete product.
【０００２】[0002]
【従来の技術】養殖用水槽、生簀、観賞用庭池、プー
ル、冷却塔等の水槽の材料には、プラスチック、ＦＲ
Ｐ、ガラス等多岐にわたる材料が使用されているが、コ
ストが安い、成形の自由度が大きい、耐候性に優れると
いったことから、セメント、砂及び水もしくはセメン
ト、砂（細骨材）、砂利（粗骨材）及び水の各種硬化体
が多く使われている。なお本明細書においてはこれら硬
化体をセメントコンクリート製品と総称する。2. Description of the Related Art Materials for water tanks such as aquaculture tanks, fish cages, ornamental garden ponds, pools, and cooling towers include plastics and FRs.
Although various materials such as P and glass are used, cement, sand and water or cement, sand (fine aggregate), and gravel (because of low cost, large degree of freedom in molding, and excellent weather resistance). Various hardened materials of coarse aggregate and water are often used. In the present specification, these cured products are collectively referred to as cement concrete products.
【０００３】しかしながら、セメントコンクリート製
品、例えば製造して間もないセメントコンクリート製の
水槽を使用する場合、水槽からアルカリ分が水中に溶け
だして水のＰＨを上昇させ、魚、藻といった動植物の生
存には適さないものとなる。それ故、アルカリ分の溶出
が低下するまで数度の水替え、もしくは数日間水を張っ
て放置する等の処置が必要である。製造後に水張り、水
替えを数度行うことでセメントの硬化またはアルカリ分
の溶出量の低下、自然中和といった効果を生じさせるさ
せるには数日から数十日を要し、工期の延長、コストの
上昇等につながる。またこの処置なしには水のＰＨが高
く、魚、藻といった動植物の生存には適さないものとな
り、また水質管理面で大きな問題がある。[0003] However, when a cement concrete product, for example, a water tank made of cement concrete, which has just been manufactured, is used, alkalis dissolve into the water to raise the pH of the water, and the survival of animals and plants such as fish and algae. Is not suitable. Therefore, it is necessary to take measures such as changing water several times until the elution of the alkali content is reduced, or leaving water standing for several days. It takes several days to several tens of days to produce effects such as cement hardening or reduction of alkali elution amount and natural neutralization by water filling and water replacement several times after production, extending the construction period and cost And so on. Without this treatment, the pH of the water is high, making it unsuitable for the survival of animals and plants such as fish and algae, and there is a major problem in water quality management.
【０００４】従来製造して間もないセメントコンクリー
ト製品を使用する場合、一般に有機系の塗料を塗布また
は吹きつけ、アルカリ分の溶出をシールする方法が採用
されている。しかしこの方法は、通常有機系溶剤を多量
に使用するためその取扱いや安全衛生上の問題があるだ
けでなく、剥離が生じ易く、耐候性が劣るという難点が
ある。[0004] In the case of using a cement concrete product which has just been manufactured, a method of applying or spraying an organic paint to seal the elution of alkali is generally adopted. However, this method generally has problems in handling, safety and hygiene since a large amount of an organic solvent is used, and also has a disadvantage that peeling is liable to occur and weather resistance is poor.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、前述した難
点を改善することができ、水張り、水替えといった中和
処理や塗料の塗布等を必要とせず、容易にセメントコン
クリート製品からアルカリ分が溶出するのを防止できる
耐候性に優れたセメントコンクリート製品の製造法を開
発することを課題とする。SUMMARY OF THE INVENTION The present invention can solve the above-mentioned difficulties, and does not require a neutralization treatment such as filling with water or replacing water, or the application of paint, and can easily remove alkali components from cement concrete products. It is an object of the present invention to develop a method for manufacturing a cement concrete product having excellent weather resistance which can prevent elution.
【０００６】[0006]
【課題を解決するための手段】本発明者らは、課題を解
決するために鋭意研究を行った結果、セメントコンクリ
ート製品の表面を水溶性金属硫酸塩及びノニオン系界面
活性剤を含有する水溶液で処理すると、セメントコンク
リート製品の表面に金属硫酸塩に起因する緻密な着色層
が形成され、表面へのアルカリ分の溶出を防止でき、前
記課題を解決できることを知見した。Means for Solving the Problems The present inventors have conducted intensive studies to solve the problems, and as a result, the surface of a cement concrete product was treated with an aqueous solution containing a water-soluble metal sulfate and a nonionic surfactant. It has been found that when the treatment is performed, a dense colored layer due to the metal sulfate is formed on the surface of the cement concrete product, elution of the alkali component to the surface can be prevented, and the above problem can be solved.
【０００７】本発明は、セメントコンクリート製品の表
面を水溶性金属硫酸塩及びノニオン系界面活性剤を含有
する水溶液で処理することを特徴とするセメントコンク
リート製品の製造法に関する。また本発明は、水溶性金
属硫酸塩の濃度が２重量％〜飽和濃度以下で、ノニオン
系界面活性剤の濃度が０．０５〜０．３％である上記セ
メントコンクリート製品の製造法に関する。[0007] The present invention relates to a method for producing a cement concrete product, comprising treating the surface of a cement concrete product with an aqueous solution containing a water-soluble metal sulfate and a nonionic surfactant. The present invention also relates to a method for producing the above cement concrete product, wherein the concentration of the water-soluble metal sulfate is 2% by weight to the saturation concentration or less, and the concentration of the nonionic surfactant is 0.05 to 0.3%.
【０００８】さらに本発明は、前記ノニオン系界面活性
剤としてエーテル型のノニオン系界面活性剤を使用する
ことを特徴とするセメントコンクリート製品の製造法に
関する。Further, the present invention relates to a method for producing a cement concrete product, wherein an ether type nonionic surfactant is used as the nonionic surfactant.
【０００９】本発明において、セメントコンクリート製
品は、例えば養殖用水槽、生簀、観賞用庭池、プール、
貯水槽、冷却塔等の水槽をはじめ、パネル、ブロック等
セメントを使用した製品であれば、その形状、種類、大
きさ等特に制限されない。In the present invention, the cement concrete product may be, for example, an aquaculture tank, a fish cage, an ornamental garden pond, a pool,
There are no particular restrictions on the shape, type, size, etc. of a product using cement, such as a water tank such as a water storage tank or a cooling tower, or a panel or a block.
【００１０】本発明で使用される水溶性金属硫酸塩とし
ては、特に高純度である必要はなく一般工業用のものが
適宜使用される。水溶性金属硫酸塩としては、周期律表
の１Ｂ族、６Ｂ族、７Ｂ族及び８族よりなる群から選択
された金属硫酸塩が好適に使用される。金属硫酸塩の具
体例としては、硫酸銅、硫酸クロム、硫酸マンガン、硫
酸鉄、硫酸コバルト、硫酸ニッケル等水溶液中でイオン
あるいはキレートを形成するものを挙げることができ
る。これら金属硫酸塩は、１種使用しても、複数種併用
して使用してもよい。水溶性金属硫酸塩の濃度は、２重
量％（無水物基準）以上から飽和濃度以下の濃度、好ま
しくは５重量％〜飽和濃度以下が特に好適である。水溶
性金属硫酸塩の濃度が２重量％未満ではセメントコンク
リ−ト製品の表面に十分な皮膜（緻密層）を形成させる
ことがでないので前記範囲の濃度がよい。The water-soluble metal sulfate used in the present invention does not need to be particularly high in purity, and those of general industrial use are appropriately used. As the water-soluble metal sulfate, a metal sulfate selected from the group consisting of Groups 1B, 6B, 7B and 8 of the periodic table is preferably used. Specific examples of metal sulfates include copper sulfate, chromium sulfate, manganese sulfate, iron sulfate, cobalt sulfate, and nickel sulfate, which form ions or chelates in an aqueous solution. These metal sulfates may be used alone or in combination of two or more. The concentration of the water-soluble metal sulphate is particularly preferably from 2% by weight (based on anhydride) to a concentration below the saturation concentration, more preferably from 5% by weight to the saturation concentration. When the concentration of the water-soluble metal sulfate is less than 2% by weight, a sufficient film (dense layer) cannot be formed on the surface of the cement concrete product, so that the concentration in the above range is preferable.
【００１１】また本発明で使用されるノニオン系界面活
性剤としては、エーテル型、エステル型、エーテルエス
テル型、含窒素型等を挙げることができる。これらの中
でもエーテル型のノニオン系界面活性剤が、セメントコ
ンクリ−ト製品への金属硫酸塩の浸透性を高める効果が
大きいので好適に使用される。The nonionic surfactants used in the present invention include ether type, ester type, ether ester type and nitrogen-containing type. Of these, ether type nonionic surfactants are preferably used because they have a large effect of increasing the permeability of metal sulfate to cement concrete products.
【００１２】エーテル型のノニオン系界面活性剤として
は、ポリオキシエチレンアルキルエーテル、ポリオキシ
エチレンアルキルフェニルエーテル、ポリオキシエチレ
ンポリオキシプロピレンブロックポリマー、単一鎖長ポ
リオキシエチレンアルキルエーテル、ポリオキシエチレ
ン２級アルコールエーテル、ポリオキシエチレンステロ
ールエーテル、ポリオキシエチレンポリオキシプロピレ
ンアルキルエーテル、アルキルフェノールホルマリン縮
合物の酸化エチレン誘導体等が挙げられる。これらエー
テル型のなかでもポリオキシエチレンポリオキシプロピ
レンアルキルエーテル、ポリオキシエチレンアルキルフ
ェニルエーテル及びポリオキシエチレンアルキルエーテ
ルは特に好適である。Examples of the ether type nonionic surfactant include polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene polyoxypropylene block polymer, single chain polyoxyethylene alkyl ether, and polyoxyethylene 2 Grade alcohol ethers, polyoxyethylene sterol ethers, polyoxyethylene polyoxypropylene alkyl ethers, and ethylene oxide derivatives of alkylphenol formalin condensates. Among these ether types, polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene alkyl phenyl ether and polyoxyethylene alkyl ether are particularly preferred.
【００１３】ノニオン系界面活性剤の濃度は０．０５〜
０．３重量％、特に０．０８〜０．１５重量％が好適で
ある。ノニオン系界面活性剤の濃度が低すぎるとセメン
トコンクリート製品への金属硫酸塩の浸透性を高める効
果が十分に発揮されず、また高い濃度にしても高くした
ことによる浸透性の効果に大きな変化ないので、前記範
囲の濃度にするのが好適である。The concentration of the nonionic surfactant is from 0.05 to
0.3% by weight, especially 0.08 to 0.15% by weight, is suitable. If the concentration of the nonionic surfactant is too low, the effect of increasing the permeability of the metal sulfate to the cement concrete product is not sufficiently exhibited, and the effect of the permeability is not significantly changed by increasing the concentration even at a high concentration. Therefore, it is preferable to set the concentration in the above range.
【００１４】水溶性金属硫酸塩及びノニオン系界面活性
剤を含有する水溶液でセメントコンクリート製品の表面
を処理する際の処理方法は、セメントコンクリート製品
へ処理液が十分に含浸しさえすれば特に制限されが、一
般には塗布、吹きつけ、デッピング等の方法が適宜採用
される。処理回数は一回の操作でも複数回でもよい。含
浸量は、セメントコンクリート製品の配合、表面状態、
金属硫酸塩の種類等によっても異なるが、普通には製品
表面積１ｍ2 あたり１０〜２００ｇである。少なすぎる
と皮膜の厚さが十分でなく、多すぎても皮膜の厚さに大
きな変化はない。皮膜の厚さは、セメントコンクリート
製品の表面からアルカリ分が溶出するのを防止するため
には１ｍｍ以上さらには３ｍｍ以上が好適である。厚さ
が１ｍｍ未満では溶出防止効果が小さい。また、水溶性
金属硫酸塩及びノニオン系界面活性剤を含有する水溶液
での処理は、脱型後であればその時期は特に制限されな
いが、セメントコンクリート製品の表面が湿潤状態にあ
るときに行うのがより効果的である。The method of treating the surface of a cement concrete product with an aqueous solution containing a water-soluble metal sulfate and a nonionic surfactant is particularly limited as long as the cement concrete product is sufficiently impregnated with the treating solution. However, generally, methods such as coating, spraying, and dipping are appropriately employed. The number of times of processing may be one operation or plural times. The amount of impregnation depends on the formulation, surface condition,
Although it varies depending on the type of metal sulfate and the like, it is usually 10 to 200 g per 1 m 2 of product surface area. If the amount is too small, the thickness of the film is not sufficient, and if the amount is too large, there is no large change in the film thickness. The thickness of the coating is preferably 1 mm or more, and more preferably 3 mm or more, in order to prevent alkali from being eluted from the surface of the cement concrete product. When the thickness is less than 1 mm, the effect of preventing elution is small. The treatment with an aqueous solution containing a water-soluble metal sulfate and a nonionic surfactant is not particularly limited as long as it is after demolding, but is performed when the surface of the cement concrete product is in a wet state. Is more effective.
【００１５】水溶性金属硫酸塩及びノニオン系界面活性
剤を含有する水溶液でセメントコンクリート製品の表面
を処理すると、セメントコンクリート製品の表面に金属
硫酸塩に起因する着色した緻密な皮膜が形成される。皮
膜成分の詳細は十分明らかではないが、主にはセメント
コンクリート製品のセメントの水和反応によって生じた
遊離Ｃａ（ＯＨ）2 が硫酸塩と反応して金属水酸化物と
硫酸カルシウムの微細結晶からなっており、この微細結
晶がそのほかの反応生成物と共にセメントコンクリート
製品表面の空隙を埋めて緻密な皮膜を形成していると推
察される。When the surface of a cement concrete product is treated with an aqueous solution containing a water-soluble metal sulfate and a nonionic surfactant, a colored and dense film due to the metal sulfate is formed on the surface of the cement concrete product. Although the details of the film components are not sufficiently clear, mainly, free Ca (OH) 2 generated by the hydration reaction of the cement of the cement concrete product reacts with the sulfate to form metal hydroxide and fine crystals of calcium sulfate. It is presumed that these fine crystals, together with other reaction products, fill the voids on the surface of the cement concrete product to form a dense film.
【００１６】本発明においてはアルカリ分の溶出だけで
なく、白華現象、中性化現象も防止することができる
が、これは前記の緻密な皮膜によってセメントコンクリ
ート製品の外部からの水分の浸透が抑制されてセメント
コンクリート製品のアルカリ分が内部から表面に溶出す
るのを抑制し、同時に白華現象も抑制され、また大気中
のＣＯ2 が製品中へ浸透するのも抑制されるので、セメ
ントコンクリート製品中のセメント水和物とＣＯ2 との
反応、即ち中性化現象も抑制されると推察している。ま
たこの緻密な皮膜（緻密層）は化学的な反応による安定
したものであるため製品表面硬度も高く、耐候性に優れ
ており塗料のように剥離したりすることもない。In the present invention, it is possible to prevent not only the elution of the alkali component but also the efflorescence phenomenon and the neutralization phenomenon. This is because the dense coating prevents the penetration of moisture from the outside of the cement concrete product. It suppresses the alkali component of the cement concrete product from being eluted from the inside to the surface, and at the same time suppresses the efflorescence phenomenon and also suppresses the permeation of atmospheric CO 2 into the product. It is speculated that the reaction between CO 2 and the cement hydrate in the product, ie, the neutralization phenomenon, is also suppressed. Further, since this dense film (dense layer) is stable by a chemical reaction, it has a high product surface hardness, is excellent in weather resistance, and does not peel off like a paint.
【００１７】本発明においては、本発明の課題を損なわ
ない範囲で水溶性金属硫酸塩及びノニオン系界面活性剤
を含有する水溶液に、セメントコンクリート製品への含
浸、浸透助剤として各種塩類や酸化剤等の化学品を適宜
添加しても差し支えない。また次に実施例を示し本発明
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。In the present invention, an aqueous solution containing a water-soluble metal sulfate and a nonionic surfactant is added to an aqueous solution containing a water-soluble metal sulfate and a nonionic surfactant as long as the object of the present invention is not impaired. Etc. may be added as appropriate. Next, the present invention will be described with reference to examples, but the present invention is not limited to these examples.
【００１８】[0018]
実施例１ 普通ポルトランドセメント：砂：砂利＝１：２：３（重
量比）、水セメント比Ｗ／Ｃ＝０．４３（重量比）、混
和剤１％（対セメント重量）のコンクリートを型枠に流
し込み、一昼夜湿空養生後、脱型し、さらに一昼夜蒸気
養生した後、１日間気中養生を行って、縦３ｍ、横１
ｍ、深さ０．５ｍ、厚さ０．２ｍのセメントコンクリー
ト製の水槽を作製した。水槽は２つ作製した。２つの水
槽の内外表面に、硫酸第一鉄の濃度が１５重量％で、ポ
リオキシエチレンアルキルエーテル（東邦化学株式会社
製）の濃度が０．１重量％の水溶液（処理液）を８０ｇ
／ｍ2 吹きつけて含浸、浸透させた。水槽の表面に黄褐
色の皮膜が形成された。Example 1 Concrete made of ordinary Portland cement: sand: gravel = 1: 2: 3 (weight ratio), water cement ratio W / C = 0.43 (weight ratio), 1% admixture (weight to cement) After curing in the moist air all day and night, the mold was removed, and after steam curing all day and night, aerial curing was performed for 1 day.
m, a depth of 0.5 m and a thickness of 0.2 m were made of a cement concrete water tank. Two water tanks were made. 80 g of an aqueous solution (treatment liquid) containing 15% by weight of ferrous sulfate and 0.1% by weight of polyoxyethylene alkyl ether (manufactured by Toho Chemical Co., Ltd.) on the inner and outer surfaces of the two water tanks.
/ M 2 to spray and impregnate. A yellow-brown film was formed on the surface of the aquarium.
【００１９】吹きつけから１日後、その１つの水槽に、
水道水を満たして屋外に放置し、１日後および７日後の
水道水のＰＨおよび溶解性鉄分の濃度を測定した。１日
後および７日後のＰＨは、いずれもＰＨは８で、溶解性
鉄分濃度はいずれも０．１ｍｇ／リットル以下であっ
た。吹きつけから１日後のもう一方の水槽は屋外に放置
して耐候性試験を行ったが褪色もほとんどなく、一年後
でも水槽の表面には白華現象は認められず、また一部を
切断して中性化試験を行ったが中性化現象も認められな
かった。One day after spraying, the water tank
Filled with tap water and left outdoors, the pH of the tap water and the concentration of soluble iron were measured after 1 day and 7 days. The pH after 1 day and after 7 days was 8 at both, and the soluble iron content was 0.1 mg / liter or less. One day after spraying, the other water tank was left outdoors to perform a weather resistance test, but there was almost no fading. Even after one year, no white spots were observed on the surface of the water tank, and a part was cut off. Then, a neutralization test was performed, but no neutralization phenomenon was observed.
【００２０】比較例１ 処理液を使用しなかったほかは、実施例１と同様にして
水槽を作製し、その１日後水槽に水道水を入れ、ＰＨを
測定したところＰＨは１２であった。その後１日１回水
槽内の水道水を全量入れ換える作業を行い、７日後の水
道水のＰＨを測定したところＰＨは１１であった。ま
た、水槽の水没していない部分の表面には約１か月でか
なりの白華現象が生じた。Comparative Example 1 A water tank was prepared in the same manner as in Example 1 except that the treatment liquid was not used. One day later, tap water was poured into the water tank, and the pH was measured. Thereafter, an operation of replacing the entire amount of the tap water in the water tank once a day was performed, and the pH of the tap water after 7 days was measured. In addition, a considerable efflorescence phenomenon occurred in about one month on the surface of the portion of the water tank that was not submerged.
【００２１】比較例２ 処理液を吹きつける代わりにアクリル系の褐色の水性塗
料を塗布したほかは、実施例１と同様にして水槽を作製
し、実施例１と同様の耐候性試験を行ったが、約３か月
で表面の一部に白華現象が認められ、褐色の塗膜が黄変
し、半年後に塗装面の一部が剥離した。Comparative Example 2 A water tank was prepared in the same manner as in Example 1 except that an acrylic brown water-based paint was applied instead of spraying the treatment liquid, and the same weather resistance test as in Example 1 was performed. However, a bluish phenomenon was observed on a part of the surface in about three months, the brown coating film turned yellow, and a part of the coated surface was peeled off after six months.
【００２２】実施例２ 処理液として実施例１の硫酸第一鉄の濃度が１５重量％
でポリオキシエチレンアルキルエーテルの濃度が０．１
重量％の水溶液の代わりに、硫酸マンガンの濃度が２０
重量％でポリオキシエチレンアルキルフェニルエーテル
（東邦化学株式会社製）の濃度が０．１重量％の水溶液
を１００ｇ／ｍ2 吹きつけたほかは、実施例１と同様に
して水槽を作製した。水槽の表面には褐色の皮膜が形成
された。実施例１と同様に１日後と７日後のＰＨおよび
溶解性マンガン濃度の測定を行った。１日後と７日後の
ＰＨはいずれも８で、溶解性マンガン濃度はいずれも
０．１ｍｇ／リットル以下であった。Example 2 The concentration of ferrous sulfate of Example 1 was 15% by weight as a treatment liquid.
And the concentration of polyoxyethylene alkyl ether is 0.1
Instead of a weight% aqueous solution, the concentration of manganese sulfate is 20%.
A water tank was prepared in the same manner as in Example 1 except that an aqueous solution having a concentration of 0.1% by weight of polyoxyethylene alkylphenyl ether (manufactured by Toho Chemical Co., Ltd.) was sprayed at 100 g / m 2 . A brown film was formed on the surface of the aquarium. The pH and the concentration of soluble manganese were measured after 1 day and 7 days in the same manner as in Example 1. The pH after 1 day and after 7 days was 8 and the soluble manganese concentration was 0.1 mg / liter or less.
【００２３】実施例３ 実施例１と同配合のコンクリートを型枠に流し込み、同
様の養生を行って縦０．６ｍ、横０．４ｍ、厚さ０．４
５ｍの擬石を作製した。この擬石の表面に硫酸クロムの
濃度が１２重量％でポリオキシエチレンポリオキシプロ
ピレンアルキルエーテル（東邦化学株式会社製）の濃度
が０．１重量％の水溶液を１２０ｇ／ｍ 2 吹きつけた。
擬石の表面には青緑色の皮膜が形成された。この擬石を
縦１．５ｍ、横１．５ｍ、深さ０．６ｍ、厚さ０．０２
ｍのアクリル製の水槽に入れて実施例１と同様に１日後
と７日後のＰＨおよび溶解性クロム濃度の測定を行っ
た。１日後と７日後のＰＨはいずれも８で、溶解性クロ
ム濃度はいずれも０．１ｍｇ／リットル以下であった。Example 3 Concrete having the same composition as in Example 1 was poured into a mold.
0.6m long, 0.4m wide, 0.4mm thick
A 5 m pseudo stone was produced. Chromium sulfate on the surface of this fake stone
Polyoxyethylene polyoxypro with a concentration of 12% by weight
Concentration of pyrene alkyl ether (Toho Chemical Co., Ltd.)
Is an aqueous solution containing 0.1% by weight of 120 g / m TwoI sprayed.
A blue-green film was formed on the surface of the fake stone. This fake stone
1.5m in height, 1.5m in width, 0.6m in depth, 0.02 in thickness
1 day after placing in an acrylic water tank
PH and soluble chromium concentration after 7 days
Was. The pH after 1 day and after 7 days was 8
In each case, the concentration was 0.1 mg / liter or less.
【００２４】[0024]
【発明の効果】本発明によると、セメントコンクリ−ト
製品のアルカリ分の溶出防止処理に要する時間を大幅に
短縮でき、白華現象や中性化現象も防止することができ
る。また本発明のセメントコンクリ−ト製品の表面に形
成される緻密な皮膜（緻密層）は化学的反応により生成
した安定なものであるため製品表面硬度も高く、耐候性
に優れており塗料のように剥離したりすることもなく、
着色された綺麗な外観を有している。According to the present invention, the time required for the treatment for preventing the elution of the alkali component of the cement concrete product can be greatly reduced, and the bleaching phenomenon and the neutralization phenomenon can also be prevented. In addition, the dense film (dense layer) formed on the surface of the cement concrete product of the present invention is a stable product formed by a chemical reaction, so that the product surface hardness is high, the weather resistance is excellent, and it is like a paint. Without peeling off
It has a beautiful colored appearance.
Claims (3)
金属硫酸塩及びノニオン系界面活性剤を含有する水溶液
で処理することを特徴とするセメントコンクリート製品
の製造法。1. A method for producing a cement concrete product, comprising treating the surface of a cement concrete product with an aqueous solution containing a water-soluble metal sulfate and a nonionic surfactant.
濃度以下で、ノニオン系界面活性剤の濃度が０．０５〜
０．３％である請求項１に記載のセメントコンクリート
製品の製造法。2. The method according to claim 1, wherein the concentration of the water-soluble metal sulfate is 2% by weight or less and the concentration of the nonionic surfactant is 0.05 to less than the saturation concentration.
The method for producing a cement concrete product according to claim 1, wherein the content is 0.3%.
ニオン系界面活性剤である請求項１に記載のセメントコ
ンクリート製品の製造法。3. The method for producing a cement concrete product according to claim 1, wherein the nonionic surfactant is an ether type nonionic surfactant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19079394A JP3282393B2 (en) | 1994-08-12 | 1994-08-12 | Manufacturing method of cement concrete products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19079394A JP3282393B2 (en) | 1994-08-12 | 1994-08-12 | Manufacturing method of cement concrete products |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0859369A JPH0859369A (en) | 1996-03-05 |
| JP3282393B2 true JP3282393B2 (en) | 2002-05-13 |
Family
ID=16263839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19079394A Expired - Fee Related JP3282393B2 (en) | 1994-08-12 | 1994-08-12 | Manufacturing method of cement concrete products |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3282393B2 (en) |
-
1994
- 1994-08-12 JP JP19079394A patent/JP3282393B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0859369A (en) | 1996-03-05 |
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