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.

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Harvey Industries
(518) 862-1490
4253 Albany Street Albany, NY, 12205
Albany, NY
LOWE'S OF NISKAYUNA, NY
518 382-8371
422 BALLTOWN ROAD SCHENECTADY, NY, 12304
Schenectady, NY
Pfeil Hardware
518-687-0014
63 Third St
Troy, NY
Kmart 4383 / Cross Merch
(518) 456-7701
1860 Central Ave
Albany, NY
Kmart 3600 / Cross Merch
(518) 372-1273
93 W Campbell Rd
Schenectady, NY
Lowe's
(518) 786-3350
790 Loudon Road
Latham, NY
HOLBROOK LUMBER CO
(518) 489-4708
70 FULLER ROAD ALBANY, NY, 12205
Albany, NY
A. Phillips Hardware
518-439-9943
235 Delaware Ave
Delmar, NY
Lowe's
(518) 348-2940
476 Route 146
Halfmoon, NY
Clifton Park - D
(518) 383-6910
15 Park Ave
Clifton Park, 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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