Grouting aid and high-strength non-shrink grout cannot be substituted for each other. Grouting aid is used for filling prestressed ducts and wrapping steel strands to prevent rust, while high-strength non-shrink grout is used for load transfer and bearing of equipment foundations and bearing pads. The two are different in purpose, formula, and inspection items; choosing the wrong one often requires chiseling and reworking. The selection sequence is fixed in three steps: first determine the engineering part, then determine the material category, and finally check the inspection items against the standard number. This article provides the division boundary, model correspondence, on-site acceptance items, and common FAQs of the two types of materials in this order, for procurement and construction technical personnel to refer to. Anhui Wankexin Technology Development Co., Ltd.'s grouting aid is divided into highway…