Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 29, 2024

Industrial solid waste (mine tailings) management has emerged as the key universal ecological challenge a result of unceasing creation rising by-products. Employing tailings makes mine fill production economical and assists resolve disposal problems. Foamed cement-based backfill (FCTB) is consisting tailings, cement, water foaming agent. It provides certain advantages such lightweight, good fluidity, thermal insulation, yet relatively weak in strength. Additionally, FCTB’s strength properties can be intensely improved by adding fibers. A total 3 diverse fibers: polypropylene (PP), glass (G), basalt (B) well dodecyltrimethylammonium bromide (DTAB) agent were used to prepare fiber-reinforced foamed cementitious (FR-FCTB). The mechanical properties, energy evolution, ductility microstructure FR-FCTB elaborately investigated uniaxial compression tests (UCS) SEM. Laboratory findings demonstrates that reinforcing effect three fibers on FCTB specimens: > basalt. showed best features fiber content 0.3% was adopted FCTB. At this time, UCS performance reinforced FCTBs 0.85 MPa increased 18.1%. addition increase fill’s storage limit, slow down discharge elastic strain within backfill, enhance toughness. factor evaluates degree deterioration filling terms post-peak drop, with all values being greater than CTB. FR-FCTB’s chief hydration product C-S-H gel. Fiber’s bridging significantly rallies crack extension thus features. Lastly, study’s main results are instructive for industrial application metallic mines.

Language: Английский