China Testing & Certification International Group Co., Ltd. (CTC, Stock Code 603060) originated from the testing and certification business of China Building Materials Academy in the 1950s. After 70 years of unremitting efforts and persistent pursuit, the company has formed five business categories: detection and testing, certification and evaluation, testing instruments and intelligent manufacturing, measurement and calibration, scientific research and technical services, committed to providing customers with technical services and comprehensive solutions of detection and testing, certification and evaluation, appraisal, consultation, training, and instruments and equipment in fields of quality, environmental protection, green, safety, health, and energy conservation.

Concrete Roofing Tiles
Appearance quality
Dimensional tolerance (dimensional deviation)
Water absorption
Load-bearing capacity (breaking load / transverse breaking strength)
Freeze-thaw resistance
Impermeability (water penetration resistance)
Radionuclide limits
Heat resistance (thermal performance / resistance to elevated temperature)
Mass deviation (weight deviation)
Concrete Roofing Tiles: JC/T 746, GB 6566
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