Fibers for Permeability Hopewell Junction 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

Williams Lumber Inc
(845) 221-2751
908 Route 82
Hopewell Junction, NY
Fastenal- Newburgh
845-564-1552
13 Jeanne Drive Newburgh, NY, 12550
Newburgh, NY
The Home Depot
(845)561-6540
1220 Route 300
Newburgh, NY
The Home Depot
(845)298-9200
1570 Route 9
Wappingers Falls, NY
Poughkeepsie - D
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635 Dutchess Turnpike
Poughkeepsie, NY
Williams Lumber Inc
(845) 698-1004
4246 Albany Post Rd
Hyde Park, NY
ABC Supply Co.,Inc/Newburgh
845-561-5565
150 S. Water Street Newburgh, NY, 12550
Newburgh, NY
Ring's End Lumber/New Milford
(860) 355-5566
Rte 7 140 Danbury Road New Milford, CT, 06776
New Milford, CT
The Home Depot
(845)279-9669
80 Independence Way SE
Brewster, NY
Newburgh Mall
(845) 566-2300
1401 Route 300
Newburgh, 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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