Fibers for Permeability Albany 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.

Local Companies

Lowe's
(518) 956-9407
1482 Central Avenue
Colonie, NY
Harvey Industries
(518) 862-1490
4253 Albany Street Albany, NY, 12205
Albany, NY
Burnt Hills Hardware & Supply Co
(518) 399-8141
217 Kingsley Rd
Burnt Hills, NY
Pfeil Hardware
518-687-0014
63 Third St
Troy, NY
Kmart 4383 / Cross Merch
(518) 456-7701
1860 Central Ave
Albany, NY
Shaker Hardware
(518) 785-9052
607 Watervliet Shaker Rd
Latham, NY
Fastenal- Albany
518-465-4234
1074 Broadway Albany, NY, 12204
Albany, NY
Lowe's of Albany
518-956-9407
1482 Central Ave Colonie, NY, 12205
Colonie, NY
Crescent Ace Hardware
(518) 371-7100
135 Lapp Rd
Clifton Park, NY
Phillips Hardware
518-346-4383
1729 Union St
Schenectady, 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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