This standard applies to the determination of the penetration of solid and semi-solid asphalt materials with a penetration of less than 350. This standard is also applicable to the determination of the penetration of asphalt materials with a penetration of 350-500. For such asphalt, it is necessary to use a sample dish with a depth of 60mm and a sample loading capacity of no more than 135mL to measure the penetration, or to obtain the penetration measured under a load of 50g multiplied by the square root of 2.
GB/T 4509-1998 history
2011GB/T 4509-2010 Standard test method for penetration of bitumen
1998GB/T 4509-1998 Bitumen--Determination of penetration
1984GB/T 4509-1984 Test method for needle penetration of petroleum bitumens