Fibers for Permeability Auburn 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
(315) 350-2220
5377 West Genesee Street
Camillus, NY
Ag Trac Llc
315-497-1650
1044 State Route 34
Genoa, NY
Secor Lumber Company Inc
315-365-2838
13140 W Church St
Savannah, NY
Valu Home Centers
315-471-1280
4671 Onandaga Blvd
Syracuse, NY
Westvale Plz
(315) 488-1180
2214 W Genesse St
Syracuse, NY
Lowe's
(315) 253-3410
299 Grant Avenue
Auburn, NY
Elbridge Ace Hardware
(315) 689-3218
237 E Main St, Big M Plaza
Elbridge, NY
Alpine Building Supply
315-497-1221
Route 38
Moravia, NY
Ferrara & Sons Bldg. Supp.,inc
315-568-9431
30 West Bayard Street
Seneca Falls, NY
Moravia True Value Hardware
(315) 497-1966
102 Main St
Moravia, 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.

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