What does the plastic track and field site force reduction test method do?

In plastic track and field facilities, force reduction testing—also known as rebound testing—is conducted using a specialized force reduction tester. This equipment is essential for evaluating the shock-absorbing properties of the surface, ensuring it meets safety and performance standards. ![Buffer performance test equipment](http://i.bosscdn.com/blog/20/15/03/13358131220151003.jpg) The device must adhere to strict specifications to ensure accurate and reliable results. First, the falling weight should weigh 20kg with a tolerance of ±0.1kg, and it must be equipped with a hard impact head that has a diameter of 20mm. The anvil used in the test should be flat and have a diameter of 100mm to provide a stable contact surface. The spring system must have a stiffness between 1750 and 2250 N/m, typically with a diameter of 95mm. If the spring stiffness exceeds this range, the results need to be adjusted accordingly. The guide tube should have a diameter of 1mm, and the distance between the columns must be greater than the anvil's diameter to prevent any lateral movement during the drop. The test bench must have a diameter of 70mm, and the radius from the ball to the bottom should be 500mm to ensure proper alignment. A screw support frame is necessary to maintain stability, and the height between the force measuring stand and the support frame must be accurate to within 0.25mm. Additionally, the drop height from the bottom of the weight to the top of the anvil must be precise, set at 55mm, with an accuracy of 0.25mm. An electronic measurement system is also required, including an amplifier equipped with a very low-pass filter. This system should be capable of recording the maximum force generated by a single impact within 0.01 seconds, with an overall accuracy of 0.5%. During the test, a 20kg mass is dropped from a height of 55mm onto the anvil. The force is transmitted through a spring plate to a spherical base equipped with a sensor. This sensor records the peak force experienced during the impact. In track and field environments, the measured force (Fs) is compared to the force on a concrete floor (Fc). The force reduction percentage is calculated using the formula: **Force Reduction (%) = (1 - Fs/Fc) × 100** When testing under air temperatures ranging from 10°C to 40°C, plastic track and field surfaces typically exhibit a ground force reduction of 35% to 50%, making them ideal for athletic performance while reducing injury risk.

Test Weight Water Bags

Test Weight Water Bags


Test Weight Water Bags are also called water weights, load test water bags, lifting water bags, etc. A weighing water bag is mainly used in ship cranes, shipyard cranes, port cranes, offshore platform cranes, gantry cranes, driving cranes, davits, etc., lifting equipment for load detection. It is more efficient, safer and cheaper to detect than traditional solid weights.


● High-frequency welding is used to make the DOING Load Testing Water Bags, and its outside is wrapped in high-strength fiber slings.

● Crane Water Bags are made of high-density composite materials (PVC, TPU) with superior sealing and corrosion resistance. It can be used at -30°C to 70°C, and it will not be unable to use normally due to seasonal changes. The material is reinforced with anti-freezing, anti-oxidation, and anti-ultraviolet properties. It is not affected by seawater, chemicals, agents, oil stains, acid and alkali and aquatic organisms.

● Water Bags for Weight can be folded during transportation, which greatly reduces space. Simple operation, light weight, small size, economical and practical, and long service life.

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