Fibers for Permeability Yorktown Heights 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

Fastenal- Fishkill
845-897-4721
115 Old Route 9 Fishkill, NY, 12524
Fishkill, NY
RIDGEFIELD SUPPLY CO
(203) 438-2626
29 PROSPECT STREET RIDGEFIELD, CT, 06877
Ridgefield, CT
B. Rose Hardware
845-446-2061
313 Main Street
Highland Falls, NY
Lowe's
(203) 546-6962
67 Eagle Road
Danbury, CT
Kmart 9416 / Cross Merch
(914) 684-1184
399 Tarrytown Rd
White Plains, NY
Williams Lumber Inc
(845) 221-2751
908 Route 82
Hopewell Junction, NY
Lowe's of Danbury
203-546-6962
2 International Drive Danbury, CT, 06810
Danbury, CT
Keough's Paint & Hardware
203-544-8379
1 Ethan Allen Highway
Ridgefield, CT
The Home Depot
(845)279-9669
80 Independence Way SE
Brewster, NY
White Plains - A
(914) 644-1400
100 Main St
White Plains, 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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