2019GB/T 50081-2019 Standards for test methods of physical and mechanical properties of concrete
2003GB 50081-2002 Test methods for mechanical properties of ordinary concrete
1990GBJ 81-1990 Test methods for mechanical properties of ordinary concrete
GBJ 81-1990 Test methods for mechanical properties of ordinary concrete was changed to GB 50081-2002 Test methods for mechanical properties of ordinary concrete.