Preparation of Self-leveling Mortar Based on Anhydrite-II Phosphogypsum

Abstract The construction material from anhydrite-II phosphogypsum is dense in structure and has good water resistance. But its disadvantages are low hydration activity long setting time. In this work, modified by adding a composite activator, which made of sulfuric acid steel slag, β-hemihydrate gypsum calcium aluminate cement. With this, the rate clearly increased time shortened. performance self leveling mortar prepared as per JC/T 1023-2021, with softening coefficient 0.8.