What problems can cause foaming of silicon PU court?
What problems can cause foaming of silicon PU court?
Silicon PU as a kind of sports facilities ground material, has good cushioning and ductility, simple construction, excellent anti-aging, stable chemical properties after construction, not easy to produce bubbles and other advantages。However, in the actual construction, there will always be a lot of foaming phenomenon, which will bring great negative impact on the performance of the site and cause unnecessary economic losses。With the development of silicon PU courts over the years, the technology has been very mature, the performance has been greatly improved, and the probability of using problems has been greatly reduced。However, if the use conditions of the main product are not followed by the process construction, there will be a high possibility of problems。
The first is the foundation: the foundation is the foundation of the entire field, which is the support of the plastic surface。The requirements for the foundation are hard, no cracks, can effectively carry the load, and provide sufficient strength adhesion。If the foundation crack is more than 2mm, it will directly break the surface layer plastic。Therefore, for the old site must be caulking treatment, if the new site cracks will not be suitable for construction, after all, the new site settlement is a slow and long process, the gap has been expanding, caulking treatment can only alleviate temporary problems。Therefore, for the new stadium, the foundation must be handled well, the base is compacted, and the concrete is played with sufficient thickness。At the same time, attention should be paid to the cement label enough, maintenance in place, to avoid freezing and summer construction, to ensure that the surface does not run sand。
All plastic stadium construction must ensure that the foundation is dry without water vapor, otherwise the probability of foaming is quite high。The course must have suitable drains to ensure that groundwater does not accumulate and seep up。Especially in the valley, the water vapor is very heavy。Before construction, the ground can be covered with plastic film, the surrounding seal cover is tight, the experiment is 24 hours, if there are more water beads, it can not be constructed。
The second is the material: now silicon PU material suppliers are uneven, different performance。Choose different manufacturers of materials, the construction process is completely different, the construction must be strictly according to the manufacturer's process documents construction, not according to experience。Limited material requirements are divided into multiple scraping, it must be according to the requirements, each thickness should be less than the specified value;Some can be shaved at once, and these must be asked before construction。
Some require water, some do not。The amount of water added must also be added according to the requirements, and try to do the same amount per barrel。
There are also human reasons: before construction, we must ensure that the site is clean, no virtual attachments, no oil stains。Slit V opening grinding, separate caulking。Before the construction of clear construction conditions, one by one, can not be greedy to rush the chaotic construction。The additives are placed in strict accordance with the proportion, and the ground humidity and temperature are observed to meet the construction conditions。Material mixing time to ensure enough, do not steal。