GB/T 25993-2023 (English Version)

Standard No.: GB/T 25993-2023
Language: Chinese, English version preview
Release Date: 2023
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 25993-2023
Replace: GB/T 25993-2010

Scope: This document specifies the product categories, grades, markings, general requirements, technical requirements, test methods, inspection rules, product certificates, stacking and transportation of permeable pavement bricks and permeable road panels. This document is applicable to the design, production, testing and application of permeable pavement products paved in municipal sidewalks, garden landscape paths, non-heavy-loaded pavement squares and other places.

Introduction

1. Standard Overview

GB/T 25993-2023 "Permeable Pavement Bricks and Permeable Road Slabs" national standard will be officially implemented on June 1, 2024, replacing the 2010 version of the standard. This standard specifies the product categories, grades, markings, general requirements, technical requirements, test methods, inspection rules, and stacking and transportation of permeable pavement bricks and permeable road slabs, and is applicable to the paving of municipal sidewalks, non-heavy-loaded squares, tree-lined paths and other places.

2. Comparison of standard frameworks

Dimensions	2010 Edition	2023 Edition
Terms and definitions	Covering multiple terms such as permeability and permeable blocks	Added a new definition of anti-slip and adjusted the expressions of core terms
Classification method	Classification by shape and specification	Added the distinction between interlocking type and ordinary type
Technical indicators	Including requirements such as permeability coefficient and flexural strength	Added new requirements for the thickness of the finishing layer and optimized mechanical performance indicators

3. Core technical requirements

3.1 Materials and processes

The materials used to make permeable pavement bricks and panels include cement, aggregates, pigments, etc., which must comply with relevant standards such as GB 175 and GB/T 2015. The production process can adopt sinter-free or sintering processes, focusing on environmental protection and sustainability.

3.2 Dimensions and appearance quality

Strict dimensional deviation requirements, the allowable deviation in the thickness direction shall not exceed ±2.0mm, and the appearance quality shall be free of obvious cracks and defects. The dimensional deviation of non-rectangular products can be agreed upon by both the supply and demand parties.

3.3 Mechanical properties

Flexural strength and splitting tensile strength are key indicators. The 2023 version of the standard adds special requirements for interlocking products to ensure their stability in complex road conditions.

4. Implementation suggestions

Manufacturers:Strengthen raw material testing and production process control to ensure that products meet standard requirements.
Engineering applications:Select appropriate product types and grades according to different usage scenarios, and give priority to materials with high water permeability and antifreeze properties.
Regulatory authorities:Increase market supervision, and regularly conduct product quality spot checks and standard promotion and training.

GB/T 25993-2023 Referenced Document

GB 175 General Purpose Portland Cement
GB 50176 Code for thermal design of civil building
GB 6566 Limits of radionuclides in building materials
GB 8076 Concrete admixtures
GB/T 12988 Test method for abrasion resistance of inorganic paving materials
GB/T 14684 Sand for construction
GB/T 14685 Pebble and crushed stone for construction
GB/T 1596 Fly ash used for cement and concrete
GB/T 17431.1 Lightweight aggregates and its test methods.Part 1:Lightweight aggregates
GB/T 18046 Ground granulated blast furnace slag used for cement，mortar and concrete
GB/T 2015 White portland cement
GB/T 20472 Sulphoaluminate cement
GB/T 32987 Test method for performance of concrete paving units
GB/T 4111 Test methods for the concrete block and brick
JC/T 474 Mortar, concrete waterproofing agent
JC/T 539 Pigments intended to be used in concrete and mortar and their test method
JC/T 870 Coloured portland cement
JC/T 933 Fast hardening high iron sulfoaluminate cement
JGJ 63 Standard of water for concrete
YB/T 4178 Galets of steel heavy blast-furnace slag for concrete

GB/T 25993-2023 history

2023 GB/T 25993-2023 Permeable paving bricks and permeable paving flags
2011 GB/T 25993-2010 Permeable paving bricks & permeable paving flags