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 tiles are a type of green and environmentally friendly new building material. They are primarily made from environmentally friendly raw materials such as cement, sand, slag, and fly ash, formed under high pressure rather than high-temperature firing. The entire tile is formed in a single compression process, without layered pressing, resulting in a homogeneous brick with consistent properties throughout (top and bottom). The surface is free from cracking and delamination. These tiles exhibit good wear resistance, with no surface shedding after compression, making them suitable for higher load-bearing environments. They also feature excellent water permeability, strong anti-slip functionality, natural and long-lasting colors, long service life, smooth surfaces, sharp edges, neat lines, high freeze-thaw resistance, and high resistance to salt-alkali conditions. They are not prone to breakage, with compressive and flexural strengths higher than similar products, ensuring driving safety. Maintenance costs are low, replacement is easy, and they facilitate the installation of underground pipelines. Available in various colors and shapes, they complement the surrounding environment, offering natural beauty.
The company has established the largest building ceramic testing center in Northwest China, covering an area of 3,000 m². It holds comprehensive qualifications for GB/T 4100-2015, ISO 13006, EN 14411, and other standards, issuing over 4,000 ceramic tile test reports annually. The National Center for Quality Inspection and Testing of Building and Sanitary Ceramics provides enterprises with customized testing services, one-stop inspection, certification, and technical guidance.
Permeable Paving Tiles
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 Tiles (Permeable concrete paving bricks, permeable concrete paving slabs): GB/T 25993
Designated CCC certification testing institution by the Certification and Accreditation Administration of China (CNCA).
The company has a 3,000 m² specialized ceramic tile laboratory with full qualifications for GB/T 4100-2015 and export testing capabilities for CE and SASO.
Provides “testing + certification” packaged services for Carbon Footprint, Environmental Product Declaration (EPD), and three-star Green Building Materials certification.
A comprehensive third-party testing service institution offering product testing, turnkey laboratory construction, conference services, technical services, and sales of reference materials and consumables.
Leveraging CTC Group’s over 700 national/industry standards and more than 1,800 patents, the company can customize internal enterprise standards and process improvement plans for clients.
All reports are synchronously verifiable on the “Official WeChat Public Platform”; clients can scan a QR code with their mobile phone to check report authenticity.
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