Fibers for Permeability Nanuet 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- Yonkers
914-378-0901
200 Saw Mill River Rd Yonkers, NY, 10701
Yonkers, NY
Sloatsburg Hardware
845-753-2725
88 Orange Turnpike
Sloatsburg, NY
The Home Depot
(914)528-1539
3131 E Main St
Mohegan Lake, NY
Empire Tools, LLC
914-937-1773
21 Abendroth Avenue Port Chester, NY, 10573
Port Chester, NY
Willowbrook Mall
(973) 890-2000
50 Route 46
Wayne, NJ
Palmer Ace Hardware
(201) 262-0900
940 Kinderkamack Rd, Charlie Browns Restaurant in Oradell
River Edge, NJ
Ramsey Hardware & Paint
201-327-0433
14 East Main
Ramsey, NJ
Lowe's
(973) 341-8102
265 Mclean Boulevard
Paterson, NJ
A W MEYER CO INC
(201) 945-5500
509 BROAD AVENUE RIDGEFIELD, NJ, 07657
Ridgefield, NJ
Midland Park - Sears Hardware Stores
(201) 447-1995
80 Godwin Ave
Midland Park, NJ

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.

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