Phosphogypsum composition having improved expansion properties

摘要

Stabilized phosphogypsum-containing compositions with low expansion and high compressive strength characteristics are prepared by admixing phosphogypsum with a cementitious binder having a calculated zero percent tricalcium aluminate content The compositions may contain phosphogypsum and cementitious binder only or they may also include sand or other filler material. The phosphogypsum composition is wetted with water, compacted and allowed to cure. The amount of water added preferably produces a maximum density of the compacted composition.