Fibers for Permeability New Paltz 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- Kingston
845-340-1602
101 Smith Avenue Kingston, NY, 12401
Kingston, NY
Scotts Corners Hardware
845-457-5005
1037 State Route 17K
Montgomery, NY
The Home Depot
(845)896-0824
450 State Route 9
Fishkill, NY
Hudson Valley Mall
(845) 382-7255
1300 Ulster Ave Ste 360
Kingston, NY
Williams Lumber Co.
(845) 876-7011
6760 Rte 9
Rhinebeck, NY
Lowe's
(845) 834-5000
650 Route 299
Highland, NY
Fastenal- Newburgh
845-564-1552
13 Jeanne Drive Newburgh, NY, 12550
Newburgh, NY
Webers Hardware & Paint
845-895-2781
22 Wallkill Ave
Wallkill, NY
Kmart 3372 / Cross Merch
(845) 297-1246
1895 South Road
Poughkeepsie, 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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