Fibers for Permeability Mahopac 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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ABC Supply Co.,Inc/Newburgh
845-561-5565
150 S. Water Street Newburgh, NY, 12550
Newburgh, NY
LOWE'S OF NEWBURGH, NY
845 567-2860
1239 ROUTE 300 NEWBURGH, NY, 12550
Newburgh, NY
Kelloggs & Lawrence
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Sears Home Appliance Showroom
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360 N Bedford Rd
Mt Kisco, NY
Kmart 9414 / Cross Merch
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Rte 118 355 Downing
Yorktown Hts, NY
Lowe's
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1239 Route 300
Newburgh, NY
Fastenal- Fishkill
845-897-4721
115 Old Route 9 Fishkill, NY, 12524
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Ring's End Lumber/South Salem
(914) 533-2517
Rte. 123 Smithfield Rd South Salem, NY, 10590
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B. Rose Hardware
845-446-2061
313 Main Street
Highland Falls, NY
Kmart 9415 / Cross Merch
(845) 628-6247
987 Route 6
Mahopac, 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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