Standard No.:	GB 46028-2025
English Name:	Safety technical requirements for building decorative stone
Chinese Name:	建筑装饰石材安全技术要求
Chinese Classification:	Q21    Masonry product
Professional Classification:	GB    National Standard
ICS Classification:	91.100.15 91.100.15    Mineral materials and products 91.100.15
Source Content Issued by:	SAMR; SAC
Issued on:	2025-08-01
Implemented on:	2026-8-1
Status:	to be valid
Target Language:	English
File Format:	PDF
Word Count:	7000 words
Translation Price(USD):	210.0
Delivery:	via email in 1~3 business day

GB 46028-2025 Safety technical requirements for building decorative stone English, Anglais, Englisch, Inglés, えいご This is a draft translation for reference among interesting stakeholders. The finalized translation (passing thorugh draft translation, self-check, revision and varification) will be delivered upon being ordered. ‌ ICS 91.100.15 CCS Q21‌ ‌People's Republic of China National Standard‌ ‌GB 46028-2025‌ ‌Safety Technical Requirements for Building Decorative Stone‌ ‌Issued on August 1, 2025‌ ‌Implemented on August 1, 2026‌ ‌Issued by‌ State Administration for Market Regulation Standardization Administration of China Contents‌ ‌Foreword‌ 1 Scope 2 Normative References 3 Terms and Definitions 4 Safety Technical Requirements 5 Test Methods 6 Inspection Rules 7 Additional Requirements 1 Scope‌ This document specifies the safety technical requirements, test methods, inspection rules, and other requirements for building decorative stones. It applies to natural stone, synthetic stone, adhesives, and protective agents used in building decoration. 2 Normative References‌ The following documents contain provisions which, through reference in this text, constitute essential requirements. For dated references, only the cited version applies; for undated references, the latest version (including amendments) applies. GB/T 1725: Paints, varnishes, and plastics - Determination of non-volatile matter content GB 6566: Limits of radioactive nuclides in building materials GB/T 6750: Paints and varnishes - Determination of density - Pycnometer method GB/T 9966.2: Test methods for natural stone - Part 2: Flexural strength after drying, water saturation, and freeze-thaw cycles GB/T 13890: Classification and terminology for natural stone GB/T 23985-2009: Paints and varnishes - Determination of volatile organic compound (VOC) content - Differential method GB/T 23986.2-2023: Paints and varnishes - Determination of volatile organic compounds (VOC) and/or semi-volatile organic compounds (SVOC) - Part 2: Gas chromatography GB/T 23990-2009: Determination of benzene, toluene, ethylbenzene, and xylene in coatings - Gas chromatography GB/T 23993: Determination of formaldehyde content in water-based coatings - Acetone spectrophotometry GB/T 24264: Adhesives for facing stone GB 30982: Limit of harmful substances in construction adhesives GB 33372-2020: Limits of volatile organic compounds in adhesives GB/T 34682-2017: Determination of volatile organic compound (VOC) content in coatings containing active diluents GB/T 35160.2: Test methods for synthetic stone - Part 2: Determination of flexural strength GB/T 35165: Classification and terminology for synthetic stone GB/T 41953: Paints and varnishes - Determination of water content - Gas chromatography JC/T 887: Epoxy adhesives for dry-hanging stone curtain walls 3 Terms and Definitions‌ Terms defined in GB 6566, GB/T 13890, and GB/T 35165, as well as the following, apply: 3.1 Building Decorative Stone‌ Stone products used for architectural, municipal, and decorative purposes. Note: Includes natural and synthetic stone. 4 Safety Technical Requirements‌ 4.1 Building Decorative Stone‌ 4.1.1 Radioactive Nuclide Limits‌ Natural granite shall comply with the radioactive nuclide limits in Table 1. Table 1 Radioactive Nuclide Limits for Natural Granite‌ Category Interior Surfaces of Class I Civil Buildings^a Interior Surfaces of Class II Civil Buildings^b and Industrial Buildings ^a Class I: Residential buildings, hospitals, schools. ^b Class II: Offices, shopping malls. 4.1.2 Panel Thickness‌ Dry-mounted natural stone and synthetic stone (mirror-finished and fine-finished panels) shall comply with Table 2. Table 2 Thickness Requirements for Dry-Mounted Panels‌ (Unit: mm) Material Type Thickness (Minimum) Natural Granite 15 Natural Marble 20 Natural Limestone/Sandstone 25 Resin-Based Synthetic 12 Inorganic-Based Synthetic 15 4.1.3 Flexural Strength‌ Dry-mounted natural and synthetic stone shall comply with Table 3. Table 3 Flexural Strength Requirements‌ Material Type Flexural Strength (MPa) Natural Granite ≥ 8.0 Natural Marble ≥ 7.0 Natural Limestone ≥ 4.0 Natural Sandstone ≥ 6.9 Resin-Based Synthetic ≥ 12.0 Inorganic-Based Synthetic ≥ 10.0 4.1.4 Freeze-Thaw Resistance‌ Outdoor dr-mounted natural stone and inorganic-based synthetic stone shall have a frost resistance coefficient of ≥ 80%.