Why the same water bag on sand wall effect is not ideal?

At present, more and more colorful. Water bag of sand and water bag in the stage of project blowout. A large number of supply is available, especially in the past two years the increase of the water sand project! Compared with water bag colorful coating, the coating has better resistance to impact performance and longer service life and very good adornment effect. However, experienced friends all know that, in the same project in the construction process of colorful coating application with a batch of paint products can guarantee the construction effect, but a lot of projects in the use of the same after the water sand still cannot achieve the ideal effect. Why is this? These places may have a problem. 1. Spray gun to adjust the construction, the traditional litchi granite stone need to spray is really stone paint, then spraying the surface coating. Construction is complex, the quality and effect is difficult to control. But, for the construction process in the case of forming shape and pattern layer, water bag sand coating is very convenient, especially in the competition for duration of the project, the advantage of water bag sand coating will be more obvious. Spray gun pressure and diameter according to the specific viscosity of water bag water sand and sand control. Too big or too small pressure leads to spray effect is not uniform. Before construction, if you don't test gun conditions, such as diameter, pressure, viscosity of coating, air pressure, it is difficult to guarantee the spraying effect. In particular, in a large project before the construction of more than one person at the same time, must be adjusted and try to spray the unity of the spray gun. The spray gun spacing is smaller, the spraying pressure, the greater the pressure effect on the product, the greater the can appear uneven water bag water coating, lead to too thick coating. Spray gun with a gun, the greater the distance between the smaller pressure, coating easy to loss, part of the spray coating material is too little, the thickness of the reach regulation. Perpendicular to the coating surface coating sectors. Manual operation of the spray gun, spraying width cannot too big, can appear otherwise uneven coating. The operation of the spray gun should always be parallel to the coating surface and perpendicular to the coating area. Operating speed is not stable, uneven thickness, too fast, the coating is too thin, homework too slow. Coating is too thick. Using spraying equipment, must make moderate intensity, distance is appropriate, in order to obtain the required coating effect. After construction, there are some things that need to improve, such as paint additives and cleaning, after using residual paint blockages and stuck, these are the problems need attention. 2. Bottom surface smoothness poor bottom surface roughness are colorful paint spraying of water bag sand effect has a great influence. If metope grassroots surface uneven, water bag of sand coating on the surface of the grass-roots flatness are harder to achieve, it not only affects the smoothness of the coating, also affect the color uniformity. Therefore, on the surface of the grass-roots level off and polishing must be finished before use. Construction method: metope cleaning: first, tap on a base level (such as with a hammer No matter whether there is a hole) Shovel to floating layer, ensure that solid at the local level. If you find empty, the original wall shall be completely eliminated, until the bottom. If found in the motion of the civil engineering approval layer empty, should be removed. Using grinding machine, grinder and other portable devices polishing at the grass-roots level, for polishing the original floating sand burr on the surface of the paint. Blow be bored with child: with external flexible putty scraping wall, requirement edge flat, smooth wall. After primer coating: flexible putty is completely dry, besmear again primer, uniform, uniform color, not yellow. The finished product protection ( Elastic fastening belt) : according to the construction requirements and the surrounding environment, take necessary counterfort measures, and ask the masking paper paste elastic fastening belt. 3. Uneven thickness uneven color water pack sand coating thickness can lead to different color coating effect, so in order to ensure uniform coating thickness, the joint part can be as the end of the coating, the size and area of the same part best is the same