Fibers for Permeability Delmar 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) 382-8371
422 Balltown Road
Schenectady, NY
Crescent Ace Hardware
(518) 371-7100
135 Lapp Rd
Clifton Park, NY
A. Phillips Hardware
518-459-2300
1157 Central Avenue
Albany, NY
Lowe's
(518) 436-6020
271 Route 9 West
Glenmont, NY
Rotterdame Sq Mall
(518) 386-5200
93 W Campbell Rd
Rotterdam, NY
Shaker Hardware
(518) 785-9052
607 Watervliet Shaker Rd
Latham, NY
LOWE'S OF COLONIE, NY
518 786-3350
800 LOUDON ROAD LATHAM, NY, 12110
Latham, NY
A. Phillips Hardware
518-765-2377
18 South Main St
Voorheesville, NY
The Home Depot
(518)283-1819
600 N Greenbush Rd
Rensselaer, NY
Lowe's
(518) 348-2940
476 Route 146
Halfmoon, 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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