Properties of Cement Mortar with Phosphogpysum under Steam Curing Condition

الملخص EN

The purpose of this study is to utilize waste PG as an admixture for concrete products cured by steam.

For the study, waste PG was classified into 4 forms (dehydrate, β-hemihydrate, III-anhydrite, and II-anhydrite), which were calcined at various temperatures.

Also, various admixtures were prepared with PG, fly-ash (FA), and granulated blast-furnace slag (BFS).

The basic properties of cement mortars containing these admixtures were analyzed and examined through X-ray diffraction, scanning electron microscopy, compressive strength, and acid corrosion resistance.

According to the results, cement mortars made with III-anhydrite of waste PG and BFS exhibited strength similar to that of cement mortars made with II-anhydrite.

Therefore, III-anhydrite PG calcined at lower temperature can be used as a steam curing admixture for concrete second production.