Fibers for Permeability Shirley 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.

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Lowe's
(631) 207-4541
2796 Route 112
Medford, NY
Lowe's of Stony Brook, NY
631-406-2015
2150 Nesconset Highway Stony Brook, NY, 11790
Stony Brook, NY
Ferreteria Valois Pagan
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Kmart 3862 / Cross Merch
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Lake Ronkonkoma-Sears Hardware Stores
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585 Portion Rd
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Costello's Ace Hardware
(631) 724-8300
246 Smithtown Blvd, CVS
Nesconset, NY
Lowe's
(631) 406-2015
2150 Nesconset Highway
Stony Brook, NY
East Islip True Value Lumber
(631) 581-1869
33 Wall St
East Islip, NY
The Home Depot
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401 Independence Plaza
Selden, NY
5137 Nesconset Hwy
(631) 476-0438
Rr 347
Pt Jefferson, NY

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.

Click here to read full article from The Concrete Producer

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