Research On Proportional Optimization And Gelation Mechanism Of Yellow Phosphorus Slag Filling

The dissertation has studied yellow phosphorus slag roundly and systemically aiming at its potential cementing performance and it can be developed a broader coming and cheaper filling cementing material.(1)Compositive using basic theories knowledge,such as sonochemistry,phase analysis,the paper has studied the filling material hydrating reaction mechanism on yellow phosphorus slag and the probability used as cementing agent in mine cementing filling from yellow phosphorus slag's physical performance,chemical component,activating mechanism and the forming process of filling materials frame.(2) According to the physical, chemical and thermodynamic characteristics of yellow phosphorus slagfill as well as its activity principle,based on a large number of indoor tests and the compressive strength of fill in different period, this paper analyzed the influences of types of alkali activator,dosage of alkali on compressive strength of cementicious materials filled with yellow phosphorus slag and its hydration reaction mechanism. The results show that proper alkali activators are the critical material for strength. NaOH and CaO are the good choices, the best dosage of that two alkalis are 5% and 8%. The hydration product of yellow phosphorus slag includes C-S-H, in addition, the sulfate of the phosphogypsum also played a certain role in stimulating.(3)getting the uniaxial compressive strength of yellow phosphorus slag-phosphogypsum cementing filling by indoor tests and revealing the influence law of the thickness of filling slurry,dosage of yellow phosphorus slag on the strength of backfill.