Fibers for Permeability Larchmont 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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BRUCKNER LUMBER & BUILDING SUPPLY
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259 Bruckner Blvd Bronx, NY, 10454
Bronx, NY
Botto Brothers Hardware
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231 Broadway
Hicksville, NY
Shields Hardware
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267-271 Main St
Port Washington, NY
Queens Lumber Company, Inc
718-539-0400
34-41 College Point Blvd
Flushing, NY
The Home Depot
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1806 E Gunhill Rd
Bronx, NY
Palmer Ace Hardware
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940 Kinderkamack Rd, Charlie Browns Restaurant in Oradell
River Edge, NJ
Fastenal- Bronx
718-409-9411
1600 Stillwell Bronx, NY, 10461
Bronx, NY
Hometown Hardware
201-768-0330
259 Closter Dock Rd
Closter, NJ
Oriental Lumber Do it Best
718-386-8200
1154 Flushing Ave
Brooklyn, NY
Brite Hardware Auto Parts, Inc
718-849-8121
112-15 Jamaica Avenue
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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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