T/WHWX 010-2024 Active

Main Technical Content: (1) Necessity. Antifreeze agents are an important concrete additive, indispensable for construction in cold regions or during cold seasons, and play a crucial role in enhancing concrete strength and durability. With continuous technological advancements, the technical updates of antifreeze products have been remarkable, and their performance has been steadily improving. However, there is an urgent need for higher, more advanced, and more unified requirements to regulate and guide the technical indicators and coverage scope specified in current product standards. The market also demands greener, more environmentally friendly, and safer products. The current standard JC 475—2004 *Concrete Antifreeze Agents* fails to address these concerns. Therefore, it is essential to develop a more advanced product standard to meet current market needs, as detailed below: A) Improving certain technical indicators. According to research by the Wanrong County Additive Agents Association and feedback from member companies, some key technical indicators of antifreeze products on the market currently exceed the requirements for qualified products in JC 475. With technological progress, product performance has significantly improved, while JC 475—2004 has not been revised for a long time. The standard’s regulatory and guidance role has become outdated compared to actual practices. For example, the method for determining steel corrosion in JC 475 has been replaced by chloride ion testing in practical applications. In engineering applications, indicators such as water reduction rate, water separation ratio, and coagulation time deviation in antifreeze-treated concrete exceed the requirements for qualified products in JC 475, with the minimum standard set at first-grade product requirements or even higher. Therefore, a standard with more advanced technical indicators is needed to meet current demands. B) Expanding technical indicator coverage. Engineering appl