The Rheological Properties and Strength Characteristics of Cemented Paste Backfill with Air-Entraining Agent

Clogging pipelines is one of the most common and urgent problems in paste backfill mining. The aim present study was to solve problem pipe blockage In this paper, mixed with coal gangue, fly ash, cement, additives used investigate influence three air-entraining agents (AEAs) (including sodium dodecyl sulfate (SDS), triterpene saponin (SJ), abietate (SA)) on flow characteristics strength paste. A series relevant tests conducted paste, such as air content experiments, slump expansion viscosity yield stress tests, uniaxial compressive (UCS) test. results show that increases increasing AEA content, but increase limited reaches a maximum at 0.9 AEA. increased by up 10–13 mm, 66–130 mm compared without decreased 0.13–0.20 Pa·s, 81.47%–93.7% original. also reduced, after 28 days curing, reduced 1–1.2 MPa. Taking into account requirement 3 MPa for from Linxi mine, it considered dosage B good choice, could better change flowability reduce pipeline transportation resistance energy consumption. At same time, acceptable. paper can provide reference performance studies pastes materials.