Polyurethane plastic runway graded gravel layer (1) maximum particle size of sand and gravel mixture should not exceed 2/3 of the thickness of the sand layer. Block shop design thickness shall be multiplied by the thickness of 1.2-1.25 compaction factor, such as 20CM thick sand layer, the plastic stadium runway, thickness should be thick 24-25CM; (2) the paving gravel to uniform thickness without particles separation, paving gravel 30-50 meters in length, basketball courts plastic runway and began splashing water, Chaozhou plastic runway, the amount of humidity and temperature and moisture content of materials related to gravel, sand and gravel to make all wet as well, splash After the surface is slightly dry, moist, rolling to not loose mix so far. If there are sand pit and plum phenomenon, should excess sand dug, respectively penetrate the right amount of sand or sand for processing. (3) quality standard sand layers: A, compaction density 2.30KG / liter or more; B, thickness tolerance + 10%; C, aspect off the elevation tolerance + 2CM; D, a width of not less than the design width; E Appearance: smooth surface density, no sand hole, plum and other phenomena; F, heavy rolling track depth of less than 5MM; prefabricated plastic track is a prefabricated web runway. Natural rubber and rubber-based artificial mixed mineral fillers, stabilizers and colorants continuous rolling process in the factory, and a high temperature of 280-300 ℃ sulfur cured integrally molded, mechanical embossing, texture consistent double Structure of synthetic rubber. (Common types of professional track and field stadium, but its high price, is the general schools and can not afford) plastic track construction, Camry sports (certified), Shaoguan plastic runway by the Dongguan City Camry Sports Facilities Engineering Co. company. Dongguan City Camry Sports Facilities Engineering Co., Ltd. (www.kmtyss.com) Dongguan, Guangdong, related products leader, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the Camry sports leadership with the staff warmly welcome all inquiries negotiations to create the Camry sports a better future.