香港梅道一号大厦外墙翻新方案

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香港梅道一号大厦外墙翻新方案

A、经现场勘察，该大厦外墙是采用石漆作爲装饰，目前已出现以下二方面的缺陷。
（一）外墙污染严重，顔色不均

由于当时石漆没作表面防污罩面处理或处理不到位，再加上该石漆的封闭性不足，导致灰尘随水渗透到石漆内层，导致石漆出现大面积发黑；另外，原石漆存在顔色或批次不一致的现象。对此，可采用自洁性各防污强的高光泽外墙漆进行处理。
处理方法：
1、高压清洗；
2、用SILPRIMER底涂改善外墙涂装质量使整个涂层具有绝佳之防水透汽性、防霉抗面；
3、用TERRASHINE SUPER外墙水性纯丙烯酸聚合物乳液二道。（顔色由贵司按TERRACO色卡选择）

（二）局部出现伸缩性裂缝
该裂缝主要表现爲无规则的蛛网式细微裂缝，由于旧墙体存在一定的收缩性，而作爲面层涂料的旧石漆不具备柔韧性，没法把细微裂缝进行桥连，故该方案采用有微弹性的涂料进行罩面处理。
1、 高压清洗；
2、 局部修补
3、 硅基渗透底涂一道；
4、 TERRASHINE SUPER二道。

B、停车场旧墙翻新
由于部份墙体已作翻新，翻新用的涂料明显表现出表面疏松、不紧密、抗渗性低。建议：
1、 高压清洗；
2、 硅基渗透底涂一道；
3、 TERRASHINE一道。

C、网球场修补
由于网球场目前是出现结构性的裂缝，必须先对厚基面裂缝进行修补处理，可采用密封膏或抗渗弄立批得，再重新做网球场。



Exterior Renovation Project for Meidao No.1 Building Hong kongA. By site spot survey, the exterior wall was originally coated with stone paint. And now it appears 2 main defects showing below.

(a) Exterior building has been seriously polluted, and also appears partial color fading
Due to the stone paint not being properly treated i.e. applied with the good quality of clear topcoat to avoid the dirt pick , plus the coating has not being sealed properly, therefore the dust penetrated into the stone paint and at the end the coat turns out to be dark. Beside above, the stone paint shows color difference due to using inconsistent batch number of products . now we use the dirt pick up resistance as solution.
   (1)
First wash down with a soda / water solution by high pressure water , rinse and allow to dry before either patching or painting. Very porous substrates   should be filled and may require a diluted first coat. Apply the paint by brush, roller or spray. The application operation should be continuous in order to avoid dry edges; therefore plan the application work accordingly.
Ensure tools and equipment are cleaned with water after use.
ensure that dust, dirt, oil, grease and old paint are moved away;
All cracks, chips, voids and damages should be repaired with a filler prior to painting.
   (2)Apply one coat of Silprimer; It is an silicon based aqueous acrylic copolymer emulsion of extremely fine particle size is used to penetrate and bind loose dusty and porous substrates.  The application of silprimer greatly reduces the incidence of secondary efflorescence in concrete.
   (3)Apply two coats of Terrashine super. It is a high-quality, water-based acrylic emulsion. It contains materials that provide excellent weather and pollution-resistant properties. Terrashine has a gloss finish when dry.
According to TERRACO color charts. Any special colors can be matched on request.

(b) Partially appears hair-line cracks
These irregular hair-line cracks causing by Shrinkage of substrate. However the stone coats do not have any elastic or flexibility to bridge the crack moving. Therefore we suggest the method as bellows:

(1) See above
   (2), Apply one coat of Silprimer; see above
   (3), Apply two coats of terrashine super. See above

B, Parking lot renovation

Since partial wall surface has been renovated, the top coats used for renovation has shown many loosing parts which has very quite low water resistance property.
We suggest the method as following:
(1) High pressure cleaning, see above  
(2) All cracks, chips, voids and damages should be repaired with a filler (Handycoat exterior) prior painting
(3)    Apply one coat of Silprimer;
   (4)    Apply two coats of Terrashine.

C, Tennis court renovation
  Since the old tennis court showing structured cracks now, it must be repaired the cracks with acrylic sealant or floor repair filler, then apply TERRACO flexipave system.