Fibers for Permeability Clifton Park 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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Fastenal- Schenectady
518-377-2112
801 Crane Street Schenectady, NY, 12303
Schenectady, NY
HOLBROOK LUMBER CO
(518) 489-4708
70 FULLER ROAD ALBANY, NY, 12205
Albany, NY
Lowe's of Glenville
518-952-8789
93 Freemans Bridge Rd Glenville, NY, 12302
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The Home Depot
(518)438-1586
979 Central Avenue
Albany, NY
Lowe's
(518) 952-8789
93 Freemans Bridge Road
Glenville, NY
Lowe's
(518) 583-3777
10 Lowe'S Drive
Saratoga Springs, NY
Harvey Industries
(518) 862-1490
4253 Albany Street Albany, NY, 12205
Albany, NY
LOWE'S OF GLENMONT, NY
518 436-6020
271 ROUTE 9 WEST GLENMONT, NY, 12077
Glenmont, NY
Amsterdam Riverfront True Value Hardware
(518) 684-6100
1000 River Front Center
Amsterdam, NY
Lowe's
(518) 436-6020
271 Route 9 West
Glenmont, 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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