Permeability of microcracked fiber-reinforced containment barriers
- Brookhaven National Lab., Upton, NY (United States). Energy Efficiency and Conservation Division
Cement-based containment barriers for waste landfills are at risk of cracking, thereby reducing effectiveness. Improved resistance to formation of permeable cracks will enhance the performance of cementitous hydraulic barriers exposed to excessive drying or to wet-dry cycles. Addition of fiber reinforcement was investigated as a potential means of improving crack resistance. Grout and soil cements with and without polypropylene fibers were subjected to different curing and exposure conditions and tested for initial and final permeability. Permeabilities under saturated flow conditions were compared to determine whether fibers could control permeable microcracking of subsurface containment barriers. Fibrillated polypropylene fibers reduced the relative change in permeability for grout and soil cement cured in water and subjected to wet-dry cycles, but did not show significant benefit for materials cured in soil and allowed to dry. Addition of monofilament fibers to barrier materials caused an increase in post-cracking permeability compared with unreinforced materials. This was attributed to increased flow paths created at failed fiber/matrix interfaces.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 118654
- Journal Information:
- Waste Management, Vol. 15, Issue 2; Other Information: PBD: 1995
- Country of Publication:
- United States
- Language:
- English
Similar Records
Permeability and microstructure of plain and polypropylene fiber reinforced grouts
Properties of cement-fly ash grout admixed with bentonite, silica fume, or organic fiber