Construction regulations for early-strength admixtures and early-strength water-reducing admixtures in concrete projects

1. The inspection items for early-strength agent and early-strength water-reducing agent entering the construction site (or concrete mixing station) should include density (or fineness), 1d, 3d compressive strength and corrosion effect on steel bars. For early-strength water-reducing agents, the water-reducing rate should be measured. If the concrete has finishing requirements, it should also be observed whether salt precipitation occurs on the surface of the concrete after…