JPH0254310B2 - - Google Patents
Info
- Publication number
- JPH0254310B2 JPH0254310B2 JP7806483A JP7806483A JPH0254310B2 JP H0254310 B2 JPH0254310 B2 JP H0254310B2 JP 7806483 A JP7806483 A JP 7806483A JP 7806483 A JP7806483 A JP 7806483A JP H0254310 B2 JPH0254310 B2 JP H0254310B2
- Authority
- JP
- Japan
- Prior art keywords
- alc
- weight
- alc material
- lithium silicate
- aqueous solution
- 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
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- 239000000463 material Substances 0.000 claims description 41
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 17
- PAZHGORSDKKUPI-UHFFFAOYSA-N lithium metasilicate Chemical compound [Li+].[Li+].[O-][Si]([O-])=O PAZHGORSDKKUPI-UHFFFAOYSA-N 0.000 claims description 16
- 229910052912 lithium silicate Inorganic materials 0.000 claims description 16
- 239000007864 aqueous solution Substances 0.000 claims description 15
- 239000000243 solution Substances 0.000 claims description 10
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 8
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 8
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical compound C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 claims description 8
- 229910018068 Li 2 O Inorganic materials 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 230000006378 damage Effects 0.000 description 11
- 238000001035 drying Methods 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 229910001868 water Inorganic materials 0.000 description 7
- 238000005470 impregnation Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 239000004567 concrete Substances 0.000 description 4
- 238000007654 immersion Methods 0.000 description 4
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003729 cation exchange resin Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- HAFJKKYURCIBBG-UHFFFAOYSA-N formaldehyde;naphthalene-1-sulfonic acid;sodium Chemical compound [Na].O=C.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 HAFJKKYURCIBBG-UHFFFAOYSA-N 0.000 description 1
- 230000009746 freeze damage Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007761 roller coating Methods 0.000 description 1
- 230000035936 sexual power Effects 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical class O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Aftertreatments Of Artificial And Natural Stones (AREA)
Description
【発明の詳細な説明】
本発明は、耐凍害性ALC材の製造方法に係わ
る。ALC材（autoclaved lightweight concrete）
は、発泡剤混入コンクリート配合物をオートクレ
ーブ中加熱養生することにより造られる発泡軽量
コンクリートであり、コンクリート建造物、構築
物等の軽量化を目的としてその開発が盛んであ
る。しかし、ALC材は、上記の如く、その製造
法に由来して多孔質の材料であり、屋外、特に雨
水で濡れる用途にはそのまゝの形態では使用し難
い。ALC材に透水防止性を付与する方法として
は、従来より、合成樹脂系塗料をALC材の表面
に塗被する方法が知られているが、形成された塗
膜は有機質であるために、耐久性に乏しくその改
良が望まれている。特に寒冷地においては、軽量
性と共にその断熱性も特徴とするALC材が好ん
で用いられるが、特に氷点下にまで気温が低下す
る寒冷地では、完全防水性でないALC材は凍害
により著るしい材料劣化が起し、場合によつては
破壊を伴なう由々しき事態を引き起す原因ともな
つている。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a frost-resistant ALC material. ALC material (autoclaved lightweight concrete)
is a foamed lightweight concrete made by heating and curing a foaming agent-containing concrete mixture in an autoclave, and its development is active for the purpose of reducing the weight of concrete buildings, structures, etc. However, as mentioned above, ALC material is a porous material due to its manufacturing method, and it is difficult to use it in its original form outdoors, especially in applications where it gets wet with rainwater. A conventional method for imparting water permeation prevention properties to ALC materials is to coat the surface of ALC materials with synthetic resin paints, but since the formed coating film is organic, it is not durable. It is lacking in performance and improvements are desired. Particularly in cold regions, ALC materials are preferred due to their light weight and insulation properties, but especially in cold regions where temperatures drop below freezing, ALC materials are not completely waterproof and are susceptible to severe frost damage. This can lead to deterioration and, in some cases, serious situations involving destruction.
本発明者らは、ALC材に耐凍害性を付与する
方法について詳しい研究を行なつた結果、
SiO2／Li2Oモル比が特定である珪酸リチウム水
溶液と少量のナフタレンスルホン酸ソーダホルム
アルデヒド縮合物を含む液が、ALC材の表面か
ら内部へ深く含浸し、含浸後に乾燥したALC材
は耐凍害性が格別に向上することを見出した。本
発明の目的は、強度及び耐久性に優れると共に耐
凍害性であるALC材の製造方法を提供すること
にある。本発明の耐凍害性ALC材の製造方法は、
ALC材に、SiO2／Li2Oモル比が2.5〜10である珪
酸リチウム水溶液と該液に対し0.01〜５重量％の
ナフタレンスルホン酸ソーダホルムアルデヒド縮
合物を含む液を含浸させた後乾燥することを特徴
とする。 As a result of detailed research on how to impart frost damage resistance to ALC materials, the present inventors found that
A liquid containing a lithium silicate aqueous solution with a specific molar ratio of SiO 2 /Li 2 O and a small amount of naphthalene sulfonic acid sodium formaldehyde condensate deeply impregnates the ALC material from the surface to the inside, and the ALC material that dries after impregnation is resistant to frost damage. It was found that sexual performance was significantly improved. An object of the present invention is to provide a method for producing an ALC material that has excellent strength and durability and is resistant to frost damage. The method for manufacturing the frost damage resistant ALC material of the present invention is as follows:
Impregnating the ALC material with a lithium silicate aqueous solution having a SiO 2 /Li 2 O molar ratio of 2.5 to 10 and a solution containing 0.01 to 5% by weight of a naphthalene sulfonic acid soda formaldehyde condensate to the solution, and then drying the material. It is characterized by
本発明の対象とするALC材は、一般的製法、
すなわち、水、セメント、及び珪砂の配合物又は
水、生石灰及び珪砂の配合物にアルミニウム粉末
等起泡剤、分散剤等添加剤を加えた後充分にかき
まぜ均一な発泡調合物となした後、これを注型し
オートクレーブ中で加熱養生することにより容易
に得られる。このようにして得られるALC材は、
通常比重0.25〜2.1程度のものである。寸法及び
形状は用途に応じ種々であるが、建材用として
は、厚さ５〜15cm程度、巾60cm、長さ150cm程度
の板材がよく用いられる。 The ALC material targeted by the present invention is manufactured using a general manufacturing method.
That is, after adding additives such as a foaming agent such as aluminum powder and a dispersing agent to a mixture of water, cement, and silica sand or a mixture of water, quicklime, and silica sand, the mixture is sufficiently stirred to form a uniform foamed mixture. It can be easily obtained by casting this and heating and curing it in an autoclave. The ALC material obtained in this way is
It usually has a specific gravity of about 0.25 to 2.1. The size and shape vary depending on the purpose, but for building materials, plates with a thickness of about 5 to 15 cm, a width of 60 cm, and a length of about 150 cm are often used.
本発明に用いられる珪酸リチウム水溶液は、ポ
リシリケートを含まないか或いはなるべくその含
有率が低いものであり、SiO2／Li2Oモル比とし
て2.5〜10程度のものである。珪酸リチウム水溶
液はモル比が10以上大となる程コロイド性を示し
ポリシリケート含有率が高くなり、ALC材への
含浸性に乏しく、また、液の安定性も充分でない
ため、かゝる液を用いると一定品質の改良ALC
材を得難い。また、モル比が2.5以下の珪酸リチ
ウム水溶液も、安定性が充分でない。本発明に用
いられる珪酸リチウム水溶液は、例えば水ガラス
水溶液を陽イオン交換樹脂等により脱アルカリし
て得られる活性珪酸の水溶液に水酸化リチウムを
加えて反応させることにより容易に得られ、市販
工業製品としても入手し得る。その濃度として
は、SiO2含有率として５〜25重量％、好ましく
は10〜20重量％程度がよい。上記含有率が５重量
％以下の液では、これを含浸させて得られる改良
ALC材の強度向上が小さく、また、25重量％以
上の液は、その粘度が過大のため、ALC材に対
する含浸性が充分でない。本発明に用いられるナ
フタレンスルホン酸ソーダホルムアルデヒド縮合
物は、縮合度約100以下の市販工業製品として容
易に入手し得る。 The lithium silicate aqueous solution used in the present invention does not contain polysilicate or has a polysilicate content as low as possible, and has a SiO 2 /Li 2 O molar ratio of about 2.5 to 10. As the molar ratio of lithium silicate aqueous solution increases to 10 or more, it exhibits colloidal properties and the polysilicate content increases, resulting in poor impregnability into ALC materials and insufficient stability of the solution. Improved ALC with constant quality when used
Difficult to obtain wood. Further, an aqueous lithium silicate solution having a molar ratio of 2.5 or less also does not have sufficient stability. The aqueous lithium silicate solution used in the present invention can be easily obtained, for example, by adding lithium hydroxide to an aqueous solution of activated silicic acid obtained by dealkalizing a water glass aqueous solution with a cation exchange resin and reacting it, and is a commercially available industrial product. It can also be obtained as Its concentration is preferably about 5 to 25% by weight, preferably about 10 to 20% by weight as SiO 2 content. Improvements obtained by impregnating liquids with the above content of 5% by weight or less
The strength improvement of the ALC material is small, and a liquid containing 25% by weight or more has an excessively high viscosity and therefore does not have sufficient impregnating properties for the ALC material. The naphthalene sulfonic acid soda formaldehyde condensate used in the present invention is easily available as a commercially available industrial product with a degree of condensation of about 100 or less.
本発明に用いられるALC材に含浸される液は、
上記珪酸リチウム水溶液と該溶液に対し、上記ナ
フタレンスルホン酸ソーダホルムアルデヒド縮合
物を0.01〜５重量％含有するものである。ナフタ
レンスルホン酸ソーダホルムアルデヒド縮合物の
含有率が0.01重量％以下では、液に高い含浸性を
与えることができず、また、５重量％以上では、
液の安定性、特に長期安定性が低下し、液を増粘
させたり、場合によつてはゲル化が起こることも
ある。特に好ましい含有率は0.05〜１重量％であ
る。本発明に用いられる上記液は、上記珪酸リチ
ウム水溶液と上記ナフタレンスルホン酸ソーダホ
ルムアルデヒド縮合物を上記比率で混合し、均一
に溶解させることにより容易に調製される。ま
た、本発明に用いられる液としては、更に塗料成
分を添加してもよい。 The liquid impregnated into the ALC material used in the present invention is
The lithium silicate aqueous solution contains 0.01 to 5% by weight of the naphthalene sulfonic acid soda formaldehyde condensate based on the solution. If the content of the naphthalene sulfonic acid soda formaldehyde condensate is less than 0.01% by weight, high impregnating properties cannot be imparted to the liquid, and if it is more than 5% by weight,
The stability of the liquid, especially the long-term stability, may decrease, the liquid may become thickened, and in some cases gelation may occur. A particularly preferred content is 0.05 to 1% by weight. The above liquid used in the present invention is easily prepared by mixing the above lithium silicate aqueous solution and the above naphthalene sulfonic acid soda formaldehyde condensate in the above ratio and uniformly dissolving the mixture. Moreover, a coating component may be further added to the liquid used in the present invention.
本発明による耐凍害性ALC材は、上記ALC材
に、液を先ず含浸させ、次いで、乾燥することに
より得られる。含浸の方法としては、浸漬法、吹
き付け法、刷毛塗り法、ローラー塗布法等の方法
でよいが、ALC材の全面から液を含浸させる浸
漬法が好ましい。液温としては70℃以上とならな
いようにすべきである。上記本発明に用いられる
珪酸リチウム水溶液は、70℃以上となると、ジシ
リケートの析出による白濁を生じ易いからであ
る。通常浸漬時間としては10分以内、好ましくは
２分〜数十秒で、ALC材の表面から数mm以上の
深さにまで液が浸透する。かくして、ALC材に
珪酸リチウム水溶液を含浸させた後は、乾燥する
必要がある。乾燥によつて水が除かれると共に珪
酸リチウム水溶液は不可逆的硬化反応を起し、
ALC材の細孔量が減ずると共に、細孔内でALC
材に珪酸リチウムの硬化物が結合し、強度も向上
したALC材となる。乾燥は、任意の方法でよく
自然乾燥、強制乾燥いずれも採用し得る。従つ
て、通常、上記含浸後は数日間程度屋内放置する
乾燥法か、又は熱風乾燥する方法が用いられる。
本発明の方法により得られるALC材の表面には、
更に合成樹脂系塗料又は、セメントペースト、モ
ルタル等を接着性良好に塗被させることもでき
る。 The frost damage resistant ALC material according to the present invention can be obtained by first impregnating the above ALC material with a liquid and then drying it. The impregnation method may be a dipping method, a spraying method, a brush coating method, a roller coating method, etc., but a dipping method in which the entire surface of the ALC material is impregnated with the liquid is preferred. The liquid temperature should not exceed 70°C. This is because the lithium silicate aqueous solution used in the present invention tends to become cloudy due to precipitation of disilicate when the temperature exceeds 70°C. Usually, the immersion time is within 10 minutes, preferably 2 minutes to several tens of seconds, and the liquid penetrates from the surface of the ALC material to a depth of several mm or more. Thus, after impregnating the ALC material with the lithium silicate aqueous solution, it is necessary to dry it. As water is removed by drying, the lithium silicate aqueous solution undergoes an irreversible curing reaction,
As the pore volume of ALC material decreases, ALC inside the pores decreases.
A cured product of lithium silicate is bonded to the material, creating an ALC material with improved strength. Any method may be used for drying, including natural drying and forced drying. Therefore, after the impregnation, a drying method is usually used in which the material is left indoors for several days, or a hot air drying method is used.
On the surface of the ALC material obtained by the method of the present invention,
Furthermore, a synthetic resin paint, cement paste, mortar, etc. can be applied to provide good adhesion.
本発明の方法は、簡易に実施することができ、
しかも得られた改良ALC材は、表面層のみが補
強改質され、透水防止性に優れると共に、内部は
空隙率が大である材質構造であるから軽量かつ断
熱性であり、特に、寒冷地において用いられる耐
凍害性ALC材として有用である。 The method of the present invention can be easily carried out,
In addition, the resulting improved ALC material has only the surface layer reinforced and modified, and has excellent water permeation prevention properties, and the interior has a material structure with high porosity, making it lightweight and heat-insulating, especially in cold regions. It is useful as a frost damage resistant ALC material.
以下、実施例及び比較例を挙げて更に詳しく説
明する。 A more detailed explanation will be given below with reference to Examples and Comparative Examples.
実施例 １
市販の比重0.5、含水率37％のALC板から、切
断により縦、横、高さがそれぞれ100mmである試
験体を調整すると共に、SiO2／Li2Oモル比3.5、
SiO2含有率10重量％の珪酸リチウム水溶液20
と該液に対し0.1重量％の平均重合度10のナフタ
レンスルホン酸ソーダホルムアルデヒド縮合物と
を加えた液を大型容器中に投入し、ALC材の浸
漬浴を用意した。Example 1 A commercially available ALC plate with a specific gravity of 0.5 and a water content of 37% was cut to prepare a test specimen with length, width, and height of 100 mm each, and a SiO 2 /Li 2 O molar ratio of 3.5.
Lithium silicate aqueous solution 20 with SiO2 content 10% by weight
A solution obtained by adding 0.1% by weight of a naphthalene sulfonic acid soda formaldehyde condensate having an average degree of polymerization of 10 to the solution was poured into a large container to prepare an immersion bath for the ALC material.
次いで、上記試験体を上記浸漬浴中に１分間全
面浸漬した後、浴から取り出し室温で72時間放置
することにより、本発明による改良ALC材を得
た。 Next, the entire surface of the test specimen was immersed in the immersion bath for 1 minute, and then taken out from the bath and left at room temperature for 72 hours to obtain an improved ALC material according to the present invention.
上記方法において、浸漬前と浸漬後の試験体の
重量差から含浸液量を算出すると81ｇであつた。
また、上記改良ALC材を割裂した面にフエノー
ルフタレン液を吹き付けて発色した部分の深さを
含浸深さとして測定したところ９mmであつた。更
に、改良ALC材を水中に浸漬した後、−20℃に16
時間維持し、次いで10℃に８時間維持する処理を
１サイクルとし、この繰り返しにより破損が発生
するサイクル数を求めると共に破損により脱落し
た試験体の重量を測定する耐凍害性試験を行なつ
たところ、破損発生サイクル数は８であり、脱落
量は１ｇであつた。 In the above method, the amount of impregnating liquid was calculated from the difference in weight between the test specimen before and after immersion, and was 81 g.
Further, when the phenolphthalene solution was sprayed onto the split surface of the improved ALC material and the depth of the colored portion was measured as the impregnation depth, it was 9 mm. Furthermore, after immersing the improved ALC material in water, it was heated to -20℃ for 16
A freeze damage resistance test was conducted in which one cycle consisted of maintaining the specimen for a certain period of time and then maintaining it at 10°C for 8 hours, and by repeating this cycle, the number of cycles at which damage occurred was determined, and the weight of the specimen that fell off due to damage was measured. The number of cycles at which breakage occurred was 8, and the amount of falling off was 1 g.
実施例 ２
実施例１におけるナフタレンスルホン酸ソーダ
ホルムアルデヒド縮合物の添加量を0.5重量％に
変えた他は同例と同様にしてテストしたところ、
含浸液量87ｇ、含浸深さ12mm、破損発生サイクル
数10、脱落量１ｇであつた。Example 2 A test was conducted in the same manner as in Example 1, except that the amount of naphthalene sulfonic acid soda formaldehyde condensate added was changed to 0.5% by weight.
The amount of impregnating liquid was 87 g, the impregnation depth was 12 mm, the number of breakage cycles was 10, and the amount of falling off was 1 g.
実施例 ３
実施例１における珪酸リチウム水溶液の代り
に、SiO2／Li2Oモル比7.5、SiO2濃度20重量％の
珪酸リチウム水溶液を用いた他は同例と同様にし
て改良ALC材を得た。テストの結果、含浸液量
72ｇ、含浸深さ６mm、脱落量３ｇ、破損発生サイ
クル数７であつた。Example 3 An improved ALC material was obtained in the same manner as in Example 1, except that a lithium silicate aqueous solution with a SiO 2 /Li 2 O molar ratio of 7.5 and a SiO 2 concentration of 20% by weight was used in place of the lithium silicate aqueous solution in Example 1. Ta. As a result of the test, the amount of impregnated liquid
The weight was 72g, the impregnation depth was 6mm, the amount of falling off was 3g, and the number of breakage cycles was 7.
実施例 ４
実施例１における室温で72時間放置による乾燥
の代りに、熱風循環式乾燥機中180℃で８分間強
制乾燥した他は同例と同様にして改良ALC材を
得た。テストの結果、破損発生サイクル数は８で
あり、脱落量は１ｇであつた。やはり充分な実用
性を有している。Example 4 An improved ALC material was obtained in the same manner as in Example 1, except that instead of drying at room temperature for 72 hours in Example 1, forced drying was performed at 180° C. for 8 minutes in a hot air circulation dryer. As a result of the test, the number of cycles at which breakage occurred was 8, and the amount of falling off was 1 g. It still has sufficient practicality.
比較例
実施例１に用いたものと同じ試験体を、そのま
ま上記耐凍害性試験したところ、１サイクル目か
らクラツク、欠落等が生じ、10サイクル目には完
全崩壊してしまつた。Comparative Example When the same test specimen used in Example 1 was directly subjected to the above-mentioned frost damage resistance test, cracks, chips, etc. occurred from the first cycle, and it completely collapsed by the 10th cycle.
Claims (1)
る珪酸リチウム水溶液と該溶液に対し0.01〜５重
量％のナフタレンスルホン酸ソーダホルムアルデ
ヒド縮合物を含む液を含浸させた後乾燥すること
を特徴とする耐凍害性ALC材の製造方法。1 ALC material is impregnated with a lithium silicate aqueous solution having a SiO 2 /Li 2 O molar ratio of 2.5 to 10 and a liquid containing a naphthalene sulfonic acid soda formaldehyde condensate in an amount of 0.01 to 5% by weight based on the solution, and then dried. A method for producing a frost-resistant ALC material characterized by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7806483A JPS59141474A (en) | 1983-05-02 | 1983-05-02 | Manufacture of antifreezing alc material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7806483A JPS59141474A (en) | 1983-05-02 | 1983-05-02 | Manufacture of antifreezing alc material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59141474A JPS59141474A (en) | 1984-08-14 |
| JPH0254310B2 true JPH0254310B2 (en) | 1990-11-21 |
Family
ID=13651413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7806483A Granted JPS59141474A (en) | 1983-05-02 | 1983-05-02 | Manufacture of antifreezing alc material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59141474A (en) |
-
1983
- 1983-05-02 JP JP7806483A patent/JPS59141474A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59141474A (en) | 1984-08-14 |
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