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.

Permeable Paving Bricks
Permeable Paving Slabs
Dimensional tolerance (dimensional deviation)
Appearance quality
Surface layer quality (finish layer / decorative layer)
Splitting tensile strength
Flexural strength (modulus of rupture)
Water permeability coefficient
Freeze-thaw resistance
Abrasion resistance (wear resistance)
Slip resistance (anti-slip performance)
Permeable Paving Bricks and Permeable Paving Slabs: GB/T 25993, GB/T 4111, GB/T 12988, GB/T 32987
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