First, the tile surface weathering test is simulated summer tile surface by high temperature after insolation and temperature in winter and summer rainstorm the repeated action of roof tile surface accelerated weathering test, is the most important test item test and evaluation system of the quality of the roof tile. The weather resistance test has a good correlation with the actual engineering, and can well reflect the actual weather resistance. Large weathering test requirements were 20 times of high temperature (70 DEG C) and rainfall (15 C) and 20 heating cycle (50 DEG C) - frozen (-20 C) cycle may not appear hollowing, shedding and cracking. Guangzhou vanard and South China University of Technology together, discussed the specific test methods, and obtains a set of detection methods similar to the national building materials testing center weatherability, our internal performance of outdoor products testing has the following characteristics:
Two, the high frequency for a focus on technology and detection of manufacturers, R & D, replacing every product every formula adjustment, each kind of raw materials, in addition to detection and analysis of individual indicators should be strictly quantitative, should also be physical products, construction performance and comprehensive performance detection qualitatively.
Three, high efficiency: shopping malls such as the battlefield, in order to meet the needs of the market, the aging test often requirements are very high, and most of the detection mechanism due to the system, the service provided by the enterprise often very difficult to meet the testing requirements.
Simulation four, sunshine: domestic general test method for resistance to aging is xenon arc radiation, but in foreign countries xenon arc radiation and ultraviolet aging test is a test method used widely, these two methods are based on completely different principle. The xenon lamp test box copies all the solar spectrum, including ultraviolet, visible, and infrared, with the aim of simulating sunlight. Ultraviolet light aging experiments do not attempt to mimic the sun's rays, but imitate the destruction of the sun's rays. It is based on the principle that long term outdoor exposure to durable materials results in the greatest damage to aging caused by short wave ultraviolet light exposure.
After comprehensive cost performance analysis: our company intends to use ultraviolet + ordinary baking lamp to simulate the direct sunlight, to ensure that sunlight damage and temperature damage are close to the actual situation.
Five 、 temperature simulation: according to the requirements of the line mark, the temperature control range of weather resistant laboratory should reach -25 degrees ~30 degrees centigrade. But because the cost of refrigeration equipment is expensive, and according to the range of temperature change in winter, cold and hot summer area, we simulate it at 0 DEG C and ~70 C for the next time:
1:0 degrees ~10 range: mainly use ice cubes to cool the laboratory, and use ice water mixture to spray cooling the experimental tile.
The temperature range is 2:10 to ~50 centigrade. The temperature control box is mainly used to regulate the temperature in the laboratory. The range of the range is from room temperature to 50 degrees, and the heating of the laboratory is carried out by means of auxiliary electric heating.
3: 50℃~70℃范围:夏季日照时间长，而且太阳辐射强度大，通常水平屋顶外表面的空气综合温度达到60~70 ℃，西墙面综合温度达到50~60 ℃，东墙面综合温度达到45~50 ℃，根据这一要求，我们采用了5-10组烘灯及2组紫外线灯进行模拟阳光直射进行烘烤，确保实验墙表面温度达到理想温度，并保证足够照射时间。
3: 50 DEG ~70 DEG range: summer sunshine time is long, and the solar radiation intensity, air temperature is usually level out of the roof surface reaches 60~70 DEG C, west wall temperature reaches 50~60 DEG C, the east wall temperature reaches 45~50 DEG C, according to this requirement, we use 5-10 group and 2 groups of ultraviolet lamp baking lamp simulated sunlight for baking, to ensure the wall surface temperature reached the ideal temperature, and ensure adequate irradiation time.
Six, of the above detection methods: does not mean that our products can achieve such a request, but can take stone tile stone metal tile adhesive produced and other similar stone tile products to do the same test to distinguish the pros and cons.