This standard specifies the terms and definitions, classification and marking, general requirements, technical requirements, test methods, inspection rules, signs, packaging, storage and transportation of cement-based permeable crystalline waterproofing materials (CCCW for short). This standard applies to powdery cement-based permeable crystalline waterproof materials made of Portland cement as the main component and mixed with a certain amount of active chemical substances, which are used in cement concrete structure waterproofing projects.