Fibers for Permeability Middletown NY
Permeability is defined as the property that governs the rate of fluid flow through a porous solid (Ref. 1). The porosity of cement paste determines the permeability of concrete (Ref. 2). The water-cement ratio is one of the largest contributors to porosity development, but, on the whole, porosity is determined through chemical interaction.
3924 Summerville Way
504 9th Street Matamoras, PA, 18336
16 Old Rudetown Road
Otisville True Value Hardware
Po Box 866 10 Wallace Street
Kmart 9462 / Cross Merch
374 Windsor Hwy Rte 32
Vails Gate, NY
Seekamp Lumber Co
2551 Route 302
LOWE'S OF NEWBURGH, NY
1239 ROUTE 300 NEWBURGH, NY, 12550
Ace Hdwe of Ellenville
140 S Main St, Next to D'lites Ice Cream Stand
Wadeson Home Center Inc.
60 Forester Avenue
The Home Depot
254 Larkin Drive
Source: THE CONCRETE PRODUCER/CONCRETE JOURNAL MAGAZINE
Publication date: March 1, 2001
Question: A customer has asked us to include fibers in the mix design for a water retention tank. The idea is that the fibers will reduce the permeability of the concrete. Is that true?
Answer: There are really two responses here. The first defines permeability, and the second determines how fibers affect permeability.
Permeability is defined as the property that governs the rate of fluid flow through a porous solid (Ref. 1). The porosity of cement paste determines the permeability of concrete (Ref. 2). The water-cement ratio is one of the largest contributors to porosity development, but, on the whole, porosity is determined through chemical interaction. Since the fibers themselves are chemically inert and have no interaction with cementitious reactions, it is not possible for the fibers to decrease the permeability of concrete.
However, this is not to say that fluid will not flow through the concrete at a different rate when fibers are present. In a simple sense, fibers are small, flexible aggregates. As such, they create a small matrix of aggregates within the larger concrete matrix. If moisture flows through concrete via the cement paste, then the fibers create a more tortuous path. The more tortuous the path, the longer it takes the water takes to traverse it.
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