National standard for fly ash chelating agent

Fly ash chelating agent is a chemical substance added to cement concrete, which can combine with free calcium ions in cement to prevent the deterioration and damage of cement concrete caused by the influence of hard water or water containing iron and copper plasma. At present, the national standard for fly ash chelating agents in China is GB/T 23858-2009 "Fly ash chelating agents for concrete".

This standard specifies the classification, requirements, test methods, inspection rules, marking, packaging, transportation, and storage of fly ash chelating agents. Specifically, this standard divides fly ash chelating agents into three categories, namely A, B, and C, which are applicable to cement concrete of different strength grades and environmental conditions.

In addition, this standard also specifies the requirements and testing methods for the chemical composition, appearance, particle size, specific surface area, water absorption, pH value, chelation rate, compressive strength and other indicators of fly ash chelating agents hedp, and provides detailed instructions on the storage, packaging, and transportation of fly ash chelating agents.

It should be noted that the above is only a brief introduction to the GB/T 23858-2009 standard. Please refer to the original text of the standard for specific content and application, and comply with relevant laws and regulations.