The cause and response of putty foaming.

Putty, as a wall decoration material, can keep the wall clean and refreshing. However, if the construction process, the details are not handled properly, putty layer foaming and other phenomena, very affect the aesthetic.
why do putty foam?
01
Rough mortar base surface foaming
phenomenon:
putty scraped up a dense
and small
bubble;
of the
: the base of the batch of scraping putty is the poured concrete wall, the surface has a release mold left a dense air eye. In such a base surface scraping, the air eye is sealed by putty paste body, gas eye air is compressed, will form a build-up of potential energy. Then, when the scraper leaves the air eye, the putty paste body is lifted by the rebound of the air in the air eye sealed compressed, forming a bubble.
Whether the mortar layer or concrete layer absorption rate is very high, the surface has fine holes, fine holes in normal conditions to store air, putty batch scraped up, water will be absorbed, air discharge will form bubbles.
for this phenomenon, we can use wall-mounted reinforcement agent glue, strengthen the grass-roots treatment, closed water absorption rate.
02
second putty foaming phenomenon
the
putty bubbles are large and dense.
cause:
such a situation, is often the first putty has not eliminated bubbles, scraping the second putty, habitual to take a blade to level, the first bubble shoveled, back to the above situation, or the same reason, in the first air eye continue to produce a new bubble.
03
concrete ceiling base bubbles
phenomenon:
generally larger bubbles or empty drums.
causes:
concrete ceiling base smooth and inconvenient construction, brushing force is not uniform, resulting in putty layer can not be firmly bonded, coupled with putty layer's own gravity, resulting in foaming.
04
the grass has floating ash or powdering caused by foaming
phenomenon:
generally foaming or drumming off the layer.
causes:
powdered or has a large amount of floating ash, after painting putty can not effectively bond the occurrence of drumming or foaming.
05
putty ingredients/recipe problem foaming
phenomenon:
in the process of stirring, a large amount of gas is produced to cause foaming.
the cause:
use of viscous high and easy to attract gas cellulose and glue powder, resulting in putty layer film-forming is very strong, the base gas is closed can not exclude bubbles. In addition, some poor-quality calcium ash contains a large amount of raw lime, water after a violent heating reaction to produce bubbles.
recommended the use of wall-an easy scraping putty, easy to find flat gypsum, the main material for high-quality inorganic gel, coupled with high-efficiency environmentally friendly organic additives, with washing sand and other natural mineral materials refined, good construction results, to the wall to lay a perfect foundation.
so how do you prevent putty foaming?
bubbles occur when the putty batch is scraped, mainly because the putty is mixed with air or water vapor during the batch scraping process, and when the gas can not be dispersed, it will produce a foaming phenomenon.
So when the construction should pay attention to the following points:
01 batch scraping before paying attention to do a good job of basic treatment

surface of the dense layer, you can use hair-making treatment, or first use the bottom putty rough to find flat, to avoid the surface putty direct construction caused by foaming problems.
02 to ensure that each layer of putty dry through
construction, to ensure that the previous process is completely dry, the use of low viscosity and flexible putty products for the next batch scraping.
03 pay attention to batch scraping thickness
putty single scrape if too thick, will also lead to putty scraping is not easy to discharge in time, thus forming bubbles, so pay special attention to control scraping thickness.
04 Pay attention to putty blending ratio
Putty stirring, be sure to follow the product packaging instructions for water mixing, putty stirring into a suitable thin consistency.
05 after stirring
stirring putty blender speed too fast will also cause the air to bubble, so stir and leave to sit for about 10 minutes before scraping.
you do when you run into putty foaming?
if the foaming area is small, it can be polished and then interfaced with reinforcement.
if there is a large area of foaming problems, then you can use a blade directly to break the small bubble, re-fill the hole with putty can be. Do not do not carry out the next batch scrape directly without repair, so that foaming will appear on the surface of the putty layer in the new batch scrape.
.