掉粉、脫層

Powder shedding and delamination

施工完成及干透后，用手觸摸有掉粉現(xiàn)象，嚴(yán)重的甚至出現(xiàn)前后兩道膩?zhàn)又g或膩?zhàn)优c基底之間相互剝離。

After the construction is completed and dried thoroughly, there is a phenomenon of powder falling when touched by hand, and in severe cases, there may even be peeling between the front and rear layers of putty or between the putty and the substrate.

【原因】膩?zhàn)釉诟邷馗稍飼r(shí)施工，水分揮發(fā)快，沒有足夠水分進(jìn)行固化，因而容易脫粉。而底層膩?zhàn)邮杷煞刍瘒?yán)重，面層膩?zhàn)犹玻稍锾鞎?huì)造成脫層。另外,外墻膩?zhàn)颖挥晁疀_刷后，粘結(jié)劑流失，重批后也容易脫層。

【 Reason 】 Putty is applied at high temperatures and dryness, and the moisture evaporates quickly. There is not enough moisture to cure, so it is easy to remove powder. The bottom layer of putty is loose and severely powdery, while the surface layer of putty is too hard and dries too quickly, which can cause delamination. In addition, after the external wall putty is washed away by rainwater, the adhesive is lost, and it is also easy to delaminate after re approval.

【解決方法】高溫、干燥強(qiáng)風(fēng)天氣施工，好將基面潤(rùn)濕無明水后再進(jìn)行膩?zhàn)邮┕ぁＪ┕r(shí)要收壓密實(shí)，適度掌握干燥時(shí)間。處理起來具體情況具體分析:

【 Solution 】 For construction in high temperature, dry and strong wind weather, it is recommended to wet the base surface without open water before applying putty. During construction, it is necessary to compact and control the drying time appropriately. Analyze the specific situation when dealing with it:

1、內(nèi)墻耐水膩?zhàn)油窟^封閉底漆后，強(qiáng)度會(huì)增加，一般無需另行處理。

1. After applying sealing primer to the waterproof putty of the inner wall, the strength will increase and generally does not require additional treatment.

2、外墻膩?zhàn)討?yīng)嚴(yán)格執(zhí)行保濕施工，避免陽(yáng)光直射施工，面層膩?zhàn)颖砀珊蠹皶r(shí)適度打磨并充分淋水2次以上。

2. The external wall putty should strictly follow the moisturizing construction to avoid direct sunlight. After the surface layer of putty is dry, it should be timely and moderately polished and thoroughly watered for at least 2 times.

3、壓光膩?zhàn)颖砻鎽?yīng)再薄批膩?zhàn)右坏溃⒓皶r(shí)進(jìn)行壓光處理。

3. The surface of the polished putty should be thinly coated with another layer of putty, and the polishing treatment should be carried out in a timely manner.