在哪里可以租女朋友回家过年

Epoxy Floor causes blistering

  Epoxy Floor causes blistering:
 In the absence of solvent-based epoxy floor paint, the presence of air is the main cause pinhole, it is the small air bubbles in the paint curing process generated when the micro pores escape. In the curing process, because the paint viscosity, porosity fine pipes will not close, but ultimately retained in the dry paint film.
To achieve the film surface and no residual air or pinholes: The first method is to select the best construction methods to reduce the amount of air entering, but in fact, most of the time construction method determined by the actual application conditions, this method is limited. The second is by adjusting the coating formulations to reduce or eliminate microbubbles. Specifically, low foaming by choosing the best raw materials or adjust the viscosity, can significantly reduce the foam problem, but this method is often limited by pre-performance coatings, and construction of the viscosity specification.
Epoxy surface blisters occurred on the first floor or basement, and sometimes also occurs over the second floor, epoxy floor shortly after the blisters usually found in construction, some of the Epoxy floor tiling morning afternoon there blisters. Blisters small to large, continuous development, the development to a certain extent stopped. The higher the temperature, the more prone to blisters, the faster the development. Blisters of various shapes, their sizes. Some blisters more than 1m in diameter, height 20 ~ 50mm.
Blisters and no apparent relationship between the construction area, the same area, some serious, some less, some intact. The same group operation, the same material ground floor epoxy construction, and some blisters, some good, that blisters are a variety of factors.
Blisters reason for this is an issue of concern to everyone, cut open blisters found bubbles contain water or inflammation yellow liquid, epoxy from the surface layer with the grass roots, at the grassroots level on the stick is pulled into a honeycomb cement-like material, see Figure 1-1; in accordance with the "physics" to explain, in a closed container filled with liquid, the liquid evaporation, the formation of the three curves of saturation temperature and pressure relationship, shown in Figure 1-2.
In closed containers containing saturated water vapor pressure is increased as the temperature rises, when the temperature is 20.C, the drum pressure within the package 0.01MPa; and when the temperature is between 70 ~ 80.C Is a straight line up to 0.1MPa; many parts of the ground during the hot summer months up to 70.C extreme radiant heat around in such a high temperature epoxy binder has softened significantly reduced adhesion, therefore tantamount to the tire gradually And blow, like the epoxy layer to muster a big package, will be pulled into the cellular cementitious material; which is not part of blisters epoxy layer and the ground part of the dip is not solid, carefully observing contact parts will not be found Curing the part, because of moisture can not be cured epoxy; then the water from where the come from?
  There are several main sources of water:
 1, primary, such as the leveling layer of cement mortar, the maximum rate of 12% water content, water content is greater than the largest grass-roots level leveling layer.
2, the epoxy inside the other ingredients in the different dehydration.
3, combined with epoxy and not leave a grass-roots construction of the gap and the chemical activity of epoxy itself, is not fully cured or experience is not fully cured wet air or gas residue.
4, the primary gas underground penetration of moisture.
From the above four aspects of analysis, wet grass-roots level is the main, absolutely dry grass-roots level is not. Moisture content can not determine the size of the ground will produce blisters, some of the grassroots ethylene residue gas and water wrapped in epoxy with the grass roots, the formation of bubbles of different sizes, the epoxy layer itself impermeable gas, water gas can not be discharged, leaving the foam in the ROC. So bubbles are generated in the plane, and more at the grassroots level and the epoxy layer; primary in water is difficult to avoid, and this is an important factor in causing blistering of epoxy layer.
As the days and nights and seasons continue to change atmospheric temperature, or gradually increased or gradually decreased. Water vapor condensation within the package to form small droplets, the pressure may also decrease due to the epoxy layer was muster some strength, drum kits of restitution, the negative pressure inside the drum kit, so turn grass-roots contain water Moisture suction, so that the water produced an increase in the bag. Temperature until the next day, because the package may be increased water evaporation, but also greater pressure on the volume and expansion of drum kits, cut open the drum kit from the grass-roots found in honeycomb-like there are some white spots, that is, and grass-roots Connected to the water channel. It is considered a developing drum package is called "live package. " When the drum kits developed to a certain size, due to the dry grass-roots level, breaking the "water"and also because of large flat package, reducing the force of upward tear, and some drum kits at the epoxy layer by high temperature steam under the sun . As the temperature down, the epoxy layer suffered varying the tension, so that epoxy layer fatigue and aging. Epoxy package is part of the drum under the action layer in the first external damage. Direct damage to epoxy layer beautiful, clean house clean closure performance and durability life. The actual situation for the project must take measures to prevent blisters.
1. to solve the production of epoxy layer of blisters, and mainly to resolve the epoxy floor construction of the "three fears & rdquo;
  (1) afraid of the water; (2) afraid of the sun; (3) the fear of dust.
 2. Take measures to prevent blisters:
  1, at the grassroots level to do the waterproof layer to prevent seepage of water vapor up control of primary or waterproof layer of 8% moisture content, the primary or the waterproof layer of compressive strength greater than 20MPa, the epoxy construction.
2 and improve grass-roots or waterproof epoxy layer and adhesion layer to overcome the expansion force when the initial blisters to avoid the occurrence of blisters.
3, the epoxy layer construction, the base coat should use good quality material, one part epoxy to penetrate to the grass roots or the upper and lower waterproof layer to form a whole, the second is to enhance the bonding force, leaving less residue after curing physical or chemical gas.
4, epoxy construction to avoid the sun photos after drying, epoxy floor surface and reduce the size of the inside temperature changes.
5, at the grassroots level or waterproof layer construction must be clean. After construction of the epoxy layer and between the grass-roots or water without leaving gaps.
在哪里可以租女朋友回家过年
Warning: include_once(bottom.php): failed to open stream: No such file or directory in /web/websys/jianheng/en/newsd.php on line 86 Warning: include_once(): Failed opening 'bottom.php' for inclusion (include_path='.:/usr/share/pear:/usr/share/php') in /web/websys/jianheng/en/newsd.php on line 86