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

RIDGEFIELD SUPPLY CO
(203) 438-2626
29 PROSPECT STREET RIDGEFIELD, CT, 06877
Ridgefield, CT
Keoughs Paint & Hardware
203-322-1641
907 High Ridge Rd
Stamford, CT
B. Rose Hardware
845-446-2061
313 Main Street
Highland Falls, NY
Pomona Do it Best Hardware
845-364-5678
1581 Route 202
Pomona, NY
White Plains - A
(914) 644-1400
100 Main St
White Plains, NY
Williams Lumber Inc
(845) 221-2751
908 Route 82
Hopewell Junction, NY
Chubby's Hardware
(914) 764-5125
68 Westchester Ave
Pound Ridge, NY
Kelloggs & Lawrence
914-232-3351
26-30 The Parkway
Katonah, NY
Herb Lack Paints & Hardware
845-358-0293
124 Main Street
Nyack, NY
The Home Depot
(914)593-7110
1 Saw Mill River Road
Hawthorne, 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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