Putty crack, empty drum, foaming, the construction method to do the right thing?

'Occasionally putty layer cracks, blisters, empty drum, and other issues. What reason is this? 'The so-called' three pieces of seven 'in addition to high-quality product quality and good construction technology, and an important role. Next, shaw will detail putty powder construction key points. Mastered the key steps and high quality products, it is easy to stay away from the putty layer foaming and empty drum. First, clean up the construction step is very important! Grassroots clean - > > mix > batch processing interface scratches - finished product maintenance - polishing note: 'polishing' is often the most easy to be ignored in the process of construction: do you know why be bored with child construction need to be polished? Putty grinding surface is flat is a very important link. Short, scratches, etc. Putty, exist in the process of batch of scraping can only be solved through surface polishing. If a scratch, after polishing putty should be how to deal with? After polishing putty scratch reasons: (1) mixed mixed granular material; ( 2) Putty product itself is exquisite, burnish use sand paper mesh count and be bored with child do not match, lead to can't cover metope paint after spraying. Solution: sandpaper, with more than 360 mesh or water putty. This batch of after the blow be bored with child, how putty layer cracking, is how to deal with? Putty cracking reasons: (1) weather change caused by dry crack; ( 2) Thermal expansion and cold contraction caused by temperature change and temperature crack; ( 3) Wall structure cracks caused by structural deformation, etc. (4) construction technology ( Batch of scraping thickness, interface processing) And maintenance method etc. Various factors may result in the crack of the putty. Solution: micro cracks: polishing, brush, then batch blow be bored with child, pay attention to control the thickness; After big crack, empty drum: remove brush clean, then batch blow be bored with child; Structural cracks: remove at the grass-roots level, brush clean, repair the structure cracks, then plaster base, strengthen grass-roots, then blow be bored with child. How severe pulverization, putty layer should be how to deal with? Putty powder reasons: (1) number of putty layer is too thin. ( 2) Forced ventilation; ( 3) Mixed uneven. Solution: mild powder can be used wet towel processing, remove float ash, then the interface processing and batch scratches. If severe pulverization putty layer, it is suggested that after removing partial interface processing before scraping. Putty layer foaming and empty drum was how, how should handle? Putty layer empty drum foaming reasons: (1) basic processes improper, such as dust, loose or smooth. The putty layer and contact close enough at the grass-roots level, form intercalation; ( 2) There are dense layer between base and putty layer. If there is no diluted interface processing interface agent, air is not usually spread to the grassroots. Solution: if there is a small air bubbles or hollow walls, interface can polishing processing, and then scratch. If metope is hollowed out, resulting in large area, suggest to be completely removed, and then scratch.