Effects of Naphthalene-Based Super Plasticizer on the Performances of Whole Tailings Backfill Materials

Abstract

According to existing backfill process of the Jiaojia Gold Mine, this research uses the whole tailings as fill aggregate to replacement grade tailings. The solid concentration of backfill slurry was increased from 68% to 72% and the naphthalene-based superplasticizer was used to achieve gravity well-distributed transport. The effects of naphthalene-based superplasticizer on the sedimentation rate, bleeding rates, fluidity and compressive strength of the whole tailings backfill materials were investigated with different content. The results show that naphthalene-based superplasticizer can slow the sedimentation rate, improve the fluidity of whole tailings backfill slurry and increase the compressive strength. The fluidity of the whole tailings backfill slurry with 0.3% naphthalene superplasticizer is largest and the compressive strength is highest in all of the specimens.