GB/T 4509-2010 Specifies the measurement of asphalt penetration. Applicable to all kinds of asphalt, the standard specifies the requirements for equipment such as penetration meters, details the preparation of asphalt samples, covering operations such as heating, stirring, and heat preservation. Specifies standard test conditions, such as temperature, contact time between needles and asphalt, etc. By accurately measuring the penetration, it can intuitively reflect the softness and hardness of asphalt, providing a key reference for mass control, product selection, and construction applications of asphalt in road paving, building waterproofing, etc., to ensure that asphalt meets the performance requirements of different scenarios.