JP4326815B2 - Concrete waterproof adhesive - Google Patents

Concrete waterproof adhesive Download PDF

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Publication number
JP4326815B2
JP4326815B2 JP2003029129A JP2003029129A JP4326815B2 JP 4326815 B2 JP4326815 B2 JP 4326815B2 JP 2003029129 A JP2003029129 A JP 2003029129A JP 2003029129 A JP2003029129 A JP 2003029129A JP 4326815 B2 JP4326815 B2 JP 4326815B2
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Prior art keywords
parts
weight
water
concrete
present
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Expired - Fee Related
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JP2003029129A
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JP2004238497A (en
Inventor
泰宏 小柳
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ECO COSMO CORPORATION
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ECO COSMO CORPORATION
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Publication of JP2004238497A publication Critical patent/JP2004238497A/en
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  • Working Measures On Existing Buildindgs (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Sealing Material Composition (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、施工後のセメントモルタルやコンクリート面に塗布して主に屋根、壁、床等の透水や漏水を防止するコンクリート系防水接着剤に関する。
【0002】
【従来の技術】
【特許文献1】
特公昭61−46434号
【特許文献2】
特公平1−22214号
【0003】
施工後のセメントモルタルやコンクリート面に塗布するタイプの防水剤においては、施工面への付着性の悪さや、塗布後の表面劣化といった問題点を解決すべく、上記従来技術が提案されている。特許文献1には、無機セメント系物質と非晶質珪酸物質とを含有する防水剤が開示されており、特許文献2には、セメントにプロピルアルコールのアミノ誘導体を添加してなる合成樹脂エマルジョンを加えてなる水性下塗り塗料組成物が開示されている。
【0004】
【発明が解決しようとする課題】
しかし、特許文献1の防水剤は、下地が乾燥状態の時に塗布したり、塗布層が硬化するまでに急激な乾燥が生じると硬化不良を起こし、防水層の強度不足や接着不良を生じるという問題があった。また、特許文献2の水性下塗り塗料組成物では、合成樹脂エマルジョンからの膜で防水性能を付与しているため、塗装剥離が生じると、その部分では防水性能を失うという問題が生じている。
【0005】
本発明は、施工後のコンクリート等の表面に塗布するタイプの防水剤における上記課題を解決するもので、耐候性、耐久性に優れ、紫外線の影響下でも半永久的に防水性を付与することのできる防水接着剤を提供することを目的とする。
【0006】
【発明を解決するための手段】
本発明者は、上記課題を解決すべく鋭意検討を行なった結果、以下の構成からなる粉体組成物を水で混練することで、耐候性、耐久性に優れ、半永久的に防水性を付与することを見出し、本発明を完成させた。
【0007】
すなわち本発明は、水硬性セメント100重量部に対し、カゼイン5〜15重量部、炭酸ナトリウム1〜4重量部、アモルファスシリカ5〜10重量部、カオリン35〜65重量部、メチルセルロース1〜4重量部、パウダーシリコン2〜6重量部の割合で配合してなる組成物100重量部に対し、水40〜70重量部配合してなるコンクリート系防水接着剤である。
【0008】
【発明の実施の形態】
本発明で用いられる水硬性セメントとしては、ポルトランドセメントが好適であるが、水を添加して硬化するものであればこれに限られるものではない。カゼインの混合量は、水硬性セメント100重量部に対し5〜15重量部が好ましい。この範囲を外れると、少なくても多くても接着力が低下する。また、カオリンは、水硬性セメント100重量部に対し35〜65重量部が好ましい。35重量部未満であると硬化不足になり、振動やねじれに対して脆くなる。また、65重量部を超えると、硬化後硬度が出過ぎて柔軟性が損なわれる。
【0009】
本発明によるコンクリート系防水接着剤の最適混合量は、水硬性セメント100重量部に対し、カゼイン10重量部、炭酸ナトリウム2.5重量部、アモルファスシリカ7重量部、カオリン50重量部、メチルセルロース2重量部、パウダーシリコン4重量部であり、この配合組成物を100重量部としたとき、水の添加量は60重量部である。
【0010】
本発明剤の製造方法は、以下の通りである。先ず、常温(15℃〜30℃)室内で、反応槽の中に以下の材料(すべて粉体)を入れ、プロペラ機械撹拌機で15分〜30分間撹拌する。
ポルトランドセメント1kgに対し、
カゼイン 100g
炭酸ナトリウム 25g
アモルファスシリカ 70g
カオリン 500g
メチルセルロース 20g
パウダーシリコン 40g
【0011】
練り箱(又は、ボール等FRP製容器)中に、上記のように配合した粉体組成物を200g計量して入れ、これに水100gを加えて良く練る。この粉体組成物は、非常に水と混ざりにくい物性を持つ。そのため、手動撹拌においても、プロペラ機撹拌においても水の混入方法を工夫する必要がある。そこで、水は、まず100gのうちの1/3程度混入する。すると、水は大きな水玉になり、撹拌を続けると、徐々に水玉の大きさが小さくなってくる。そして、水玉が殆ど目視で確認できないくらいになってから、残りの2/3の水を加え、撹拌する。さらに撹拌を続けると、極小の水玉の表面張力が壊れ、水と混練される。この段階でゲル状に変化する。最後に、このゲル状組成物に、更に水20gを加え30分〜45分程度撹拌混練すれば、本剤が得られる。
【0012】
本発明剤によるコンクリート面等への施工は、刷毛塗り、コテ塗り、スプレーガン吹き等常法により行なうことができる。施工後の硬化時間は、5℃で8時間、20℃で4時間程度である。ゲル状の本剤は、通常そのまま用いられるが、希釈して使用することも可能である。希釈には水を加えればよく、塗布も簡単で作業性に優れている。
【0013】
本発明剤の用途としては、発泡コンクリートやブロック、建築物の屋根や壁の透水防止剤として、サッシ回り、メジ回り、水槽やプールの漏水防止剤として、あるいはタイルやアスタイルの貼付剤として広く利用することができる。また、強力な接着力を有することから、駐車場の区画線引き塗料としても利用でき、さらに、1mm〜2mm厚で薄塗りが可能なことから、コンクリート壁の落書き消去膜としても利用することができる。
【0014】
【実施例】
以下に、実施例を用いて本発明を説明するが、本発明はその要旨を変えない限り、この実施例に限定されるものではない。
【0015】
「実施例1」
市販のコンクリート製桝(外寸240mm×240mm、内寸176mm×176mm、深さ150mm)にコンクリート板(300mm×300mm、厚さ150mm)を底板として水密接着し、コンクリート製容器を2個作成した。1個はその内面及び底面全面に厚さ1mmで本発明剤を塗布し一日養生して本発明剤実施容器とし、他の1個をコンクリート生肌のままの対照容器とした。両容器に水3500cc注水し、蒸発を防ぐための蓋をし、底板接着部分に漏水のないことを確認したうえで、96時間後の残水量を計量した。対照容器は、2850ccとなって650cc減っていたが、本発明剤実施容器では、3400ccで僅か100ccの減少に留まった。
【0016】
「実施例2」
市販のコンクリート板(300mm×300mm、厚さ150mm)に赤色の油性スプレーペンキで○印を書き、24時間乾燥後、○印を書いた面全面に本発明剤を左官コテで厚さ1mm〜2mmで塗り、24時間放置後、目視で○印を確認したが、○印は塗膜で隠され全く見えなかった。この塗膜を打面直径30mmの金槌で剥離を試みたが、細かい亀裂は入るものの、剥離しなかった。
【0017】
「実施例3」
緑地造園工事で施工した調整桝の漏水部分の補修に本発明剤を使用した。調整桝は、外寸900mm×900mm、内寸810mm×810mm、深さ1200mmのコンクリート製で、桝の壁面には4箇所の亀裂(5mm幅で長さ150mm程度のもの)が入っていた。桝周囲の土を掘り、亀裂にコテで本発明剤を丹念に塗り込み、2日間養生後、土を戻し現状回復した。本発明剤使用量は約500gであった。施工10日後に確認したところ、漏水は止まり、施工後2年経過しても、漏水の兆項は現れていない。
【0018】
「実施例4」透水試験
一辺が15cm、深さ4cmの正方形型枠でモルタルを成形し、2日を経て脱型後、無塗布を対照区、本発明剤をヘラにより1mm厚で塗布し所定時間乾燥させたものを本発明区とし、JIS−A1404(建築用セメント防水剤の試験方法)に従って透水試験を行なった。透水試験は、各試験体(3個づつ)に3kgf/cmの水圧を1時間加え、透水量と透水比を測定した。測定結果は、対照区が透水量で平均30g、透水比が1.00であるのに対し、本発明区では、透水量で平均6g、透水比は0.20であった。
【0019】
「実施例5」接着試験
一辺が30cm、厚さ6cmの正方形コンクリート製下地板を用意し、これに1mm厚のモルタルを塗布し、その上にタイルを接着したものを対照区、下地板に1mm厚の本発明剤を塗布し、その上にタイルを接着したものを本発明区とし、各5個作成してJIS−A1404に従って接着試験を行なった。試験は、28日目に接着試験機により接着強さを測定することで行なった。測定結果は、対照区で1kgf/cmであったが、本発明区では、平均14kgf/cmとなった。
【0020】
「実施例6」耐候性試験
【0021】
【発明の効果】
本発明剤を施工後のコンクリート面等やコンクリート系の亀裂に使用することで、優れた防水性と接着性を発揮し、耐候性、耐久性にも優れ、紫外線の影響下でも半永久的に防水性を付与することができる。
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a concrete-based waterproof adhesive that is applied to cement mortar and concrete surfaces after construction, and mainly prevents water permeation and leakage of roofs, walls, floors and the like.
[0002]
[Prior art]
[Patent Document 1]
Japanese Examined Patent Publication No. 61-46434 [Patent Document 2]
Japanese Patent Publication No. 1-2214
In the case of waterproofing agents of the type applied to cement mortar and concrete surfaces after construction, the above prior art has been proposed in order to solve problems such as poor adhesion to construction surfaces and surface deterioration after application. Patent Document 1 discloses a waterproofing agent containing an inorganic cement-based material and an amorphous silicate material. Patent Document 2 discloses a synthetic resin emulsion obtained by adding an amino derivative of propyl alcohol to cement. An additional aqueous primer coating composition is disclosed.
[0004]
[Problems to be solved by the invention]
However, the waterproofing agent disclosed in Patent Document 1 is applied when the base is in a dry state, or causes rapid curing before the coating layer is cured, resulting in poor curing, resulting in insufficient strength and poor adhesion of the waterproof layer. was there. Moreover, in the water-based undercoat coating composition of patent document 2, since the waterproof performance is provided with the film | membrane from a synthetic resin emulsion, when coating peeling arises, the problem that a waterproof performance is lost in the part has arisen.
[0005]
The present invention solves the above-mentioned problems in the type of waterproofing agent applied to the surface of concrete after construction, is excellent in weather resistance and durability, and imparts waterproofness semipermanently even under the influence of ultraviolet rays. An object of the present invention is to provide a waterproof adhesive that can be used.
[0006]
[Means for Solving the Invention]
As a result of intensive studies to solve the above-mentioned problems, the present inventors kneaded a powder composition having the following constitution with water, thereby providing excellent weather resistance and durability and semipermanently waterproofing. As a result, the present invention has been completed.
[0007]
That is, the present invention is 5 to 15 parts by weight of casein, 1 to 4 parts by weight of sodium carbonate, 5 to 10 parts by weight of amorphous silica, 35 to 65 parts by weight of kaolin, and 1 to 4 parts by weight of methyl cellulose with respect to 100 parts by weight of hydraulic cement. It is a concrete waterproof adhesive formed by blending 40 to 70 parts by weight of water with respect to 100 parts by weight of the composition formed by blending 2 to 6 parts by weight of powder silicon.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The hydraulic cement used in the present invention is preferably Portland cement, but is not limited to this as long as it is hardened by adding water. The mixing amount of casein is preferably 5 to 15 parts by weight with respect to 100 parts by weight of the hydraulic cement. If it is out of this range, the adhesive strength is reduced at most. Moreover, 35-65 weight part of kaolin is preferable with respect to 100 weight part of hydraulic cement. If it is less than 35 parts by weight, the composition becomes insufficiently cured and becomes brittle with respect to vibration and twist. On the other hand, if it exceeds 65 parts by weight, the hardness after curing is excessively increased and the flexibility is impaired.
[0009]
The optimum mixing amount of the concrete waterproof adhesive according to the present invention is 10 parts by weight of casein, 2.5 parts by weight of sodium carbonate, 7 parts by weight of amorphous silica, 50 parts by weight of kaolin and 2 parts by weight of methylcellulose with respect to 100 parts by weight of hydraulic cement. Part of powder silicon and 4 parts by weight of powder silicon. When this blended composition is 100 parts by weight, the amount of water added is 60 parts by weight.
[0010]
The method for producing the agent of the present invention is as follows. First, the following materials (all powders) are put in a reaction vessel in a room temperature (15 ° C. to 30 ° C.) room, and stirred with a propeller mechanical stirrer for 15 to 30 minutes.
For 1 kg of Portland cement,
Casein 100g
Sodium carbonate 25g
70g of amorphous silica
Kaolin 500g
20g methylcellulose
40g of powder silicon
[0011]
In a kneading box (or a container made of FRP such as a ball), 200 g of the powder composition blended as described above is weighed, and 100 g of water is added thereto and kneaded well. This powder composition has physical properties that are very difficult to mix with water. Therefore, it is necessary to devise a method of mixing water in both manual stirring and propeller stirring. Therefore, about 1/3 of 100 g of water is first mixed. Then, the water becomes a large polka dot, and when the stirring is continued, the size of the polka dot gradually decreases. Then, after almost no polka dots can be visually confirmed, the remaining 2/3 of water is added and stirred. When stirring is continued, the surface tension of the extremely small polka dots is broken and kneaded with water. It changes into a gel at this stage. Finally, 20 g of water is further added to this gel composition, and the mixture is stirred and kneaded for about 30 minutes to 45 minutes to obtain this agent.
[0012]
Construction on the concrete surface or the like by the agent of the present invention can be performed by a conventional method such as brush coating, trowel coating, spray gun blowing or the like. The curing time after construction is about 8 hours at 5 ° C. and about 4 hours at 20 ° C. The gel form is usually used as it is, but it can also be used after diluting. Water can be added for dilution, and application is easy and workability is excellent.
[0013]
As the use of the present invention agent, it is widely used as a water permeation prevention agent for foamed concrete and blocks, building roofs and walls, as a sash around, medley around, water leak prevention agent for aquariums and pools, or as a tile or astyle patch. Can be used. In addition, since it has a strong adhesive force, it can also be used as a partitioning paint for parking lots, and it can also be used as a graffiti erasing film on concrete walls because it can be thinly coated with a thickness of 1 to 2 mm. .
[0014]
【Example】
Hereinafter, the present invention will be described using examples, but the present invention is not limited to these examples unless the gist thereof is changed.
[0015]
"Example 1"
Two concrete containers were prepared by water-tightly bonding a concrete plate (300 mm × 300 mm, thickness 150 mm) as a bottom plate to a commercially available concrete slag (outer dimensions 240 mm × 240 mm, inner dimensions 176 mm × 176 mm, depth 150 mm). One was applied to the inner surface and the entire bottom surface of the present invention with a thickness of 1 mm, and was cured for one day to serve as a container for implementing the present invention, and the other was used as a control container with raw concrete skin. Both containers were filled with 3500 cc of water, covered to prevent evaporation, and after confirming that there was no water leakage at the bottom plate adhesion portion, the remaining water amount after 96 hours was weighed. The control container was 2850 cc and decreased by 650 cc. However, in the inventive agent-implemented container, the decrease was only 100 cc at 3400 cc.
[0016]
"Example 2"
A commercially available concrete board (300 mm × 300 mm, thickness 150 mm) is marked with a circle with a red oil spray paint, dried for 24 hours, and then the agent of the present invention is 1 mm to 2 mm thick with a plastering iron on the entire surface where the circle is marked. After coating for 24 hours and allowing to stand for 24 hours, the ◯ mark was visually confirmed, but the ◯ mark was hidden by the coating film and was not visible at all. Although this coating film was peeled with a hammer having a striking face diameter of 30 mm, it did not peel although fine cracks were formed.
[0017]
"Example 3"
The agent of the present invention was used for repairing the leaked portion of the adjustment rod constructed in the green landscaping. The adjustment rod was made of concrete having an outer size of 900 mm × 900 mm, an inner size of 810 mm × 810 mm, and a depth of 1200 mm, and four cracks (thickness of 5 mm and length of about 150 mm) were contained in the wall surface of the cage. The soil around the fence was dug, and the present agent was carefully applied to the cracks with a trowel. After curing for 2 days, the soil was returned and recovered. The amount of the present agent used was about 500 g. When confirmed 10 days after the construction, the water leakage stopped, and no signs of water leakage appeared even after 2 years of construction.
[0018]
[Example 4] Water permeability test A mortar was molded in a square mold with a side of 15 cm and a depth of 4 cm. After 2 days, the mortar was removed. The water-dried test was conducted according to JIS-A1404 (testing method for building cement waterproofing agent). In the water permeation test, a water pressure of 3 kgf / cm 2 was applied to each test body (3 pieces each) for 1 hour, and the water permeation amount and the water permeation ratio were measured. In the measurement results, the control group had an average water permeability of 30 g and the water permeability ratio was 1.00, whereas the present invention group had an average water permeability of 6 g and a water permeability ratio of 0.20.
[0019]
[Example 5] Adhesion test A square concrete base plate having a side of 30 cm and a thickness of 6 cm was prepared, and a 1 mm thick mortar was applied to this, and a tile was adhered to the control group. Thickness of the agent of the present invention was applied and tiles were bonded on top of this to make the present invention section. The test was performed by measuring the adhesive strength on the 28th day using an adhesion tester. The measurement result was 1 kgf / cm 2 in the control group, but averaged 14 kgf / cm 2 in the present invention group.
[0020]
[Example 6] Weather resistance test [0021]
【The invention's effect】
By using the agent of the present invention on concrete surfaces after construction and cracks in concrete, it exhibits excellent waterproofness and adhesion, excellent weather resistance and durability, and semipermanently waterproof even under the influence of ultraviolet rays Sex can be imparted.

Claims (1)

水硬性セメント100重量部に対し、カゼイン5〜15重量部、炭酸ナトリウム1〜4重量部、アモルファスシリカ5〜10重量部、カオリン35〜65重量部、メチルセルロース1〜4重量部、パウダーシリコン2〜6重量部の割合で配合してなる組成物100重量部に対し、水40〜70重量部配合してなることを特徴とするコンクリート系防水接着剤。5 to 15 parts by weight of casein, 1 to 4 parts by weight of sodium carbonate, 5 to 10 parts by weight of amorphous silica, 35 to 65 parts by weight of kaolin, 1 to 4 parts by weight of methylcellulose, 2 to 2 parts of powdered silicone, based on 100 parts by weight of hydraulic cement A concrete waterproofing adhesive comprising 40 to 70 parts by weight of water per 100 parts by weight of a composition formulated at a ratio of 6 parts by weight.
JP2003029129A 2003-02-06 2003-02-06 Concrete waterproof adhesive Expired - Fee Related JP4326815B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103437525A (en) * 2013-08-22 2013-12-11 德清扬泰建筑材料有限公司 Tile seam processing process
CN107254973A (en) * 2017-07-21 2017-10-17 马明才 A kind of old flat-top ftractures two-in-one with the weather-proof glue construction method of large area anyway
CN108675820A (en) * 2018-04-20 2018-10-19 重庆致威门业股份有限公司 A kind of foam cement anti-fire door core board and preparation method thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107060223B (en) * 2017-04-24 2019-07-30 重庆建工住宅建设有限公司 A kind of foam concrete thermal insulation layer construction method and foam concrete material pulp pumping equipment
CN109653523A (en) * 2017-10-12 2019-04-19 蒲连影 A kind of civil buildings exterior wall crack repairing method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103437525A (en) * 2013-08-22 2013-12-11 德清扬泰建筑材料有限公司 Tile seam processing process
CN107254973A (en) * 2017-07-21 2017-10-17 马明才 A kind of old flat-top ftractures two-in-one with the weather-proof glue construction method of large area anyway
CN108675820A (en) * 2018-04-20 2018-10-19 重庆致威门业股份有限公司 A kind of foam cement anti-fire door core board and preparation method thereof

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