GB/T 27690-2023 Silica Fume for Mortar and Concrete is a national standard in China that specifies the requirements and test methods for silica fume used in the production of mortar and concrete.
Silica fume, also known as microsilica, is a by-product of the production of silicon metal and ferrosilicon alloys. It is a highly reactive and pozzolanic material that enhances the properties of mortar and concrete, such as strength, durability, and resistance to chemical attacks.
This standard covers the classification, requirements, test methods, inspection rules, marking, packaging, transportation, and storage of silica fume. It provides guidance on the physical and chemical properties, as well as the performance requirements, of silica fume for use in mortar and concrete.
The standard specifies the testing methods for determining the particle size distribution, specific surface area, loss on ignition, bulk density, air content, and other important properties of silica fume. It also includes requirements for the packaging and labeling of silica fume to ensure its quality and traceability.
By complying with GB/T 27690-2023, manufacturers and users of silica fume can ensure that the material meets the necessary quality standards for producing high-performance mortar and concrete. This standard contributes to the improvement of construction materials and the overall quality of construction projects.