Fibers for Permeability Horseheads 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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LOWE'S OF BIG FLATS, N.Y.
607 739-6106
913 COUNTY RD, RT 64 ELMIRA, NY, 14903
Elmira, NY
Horseheads Do it center
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Horseheads, NY
Tom's Hardware & Feed Inc.
607-565-2736
615-617 Cayuta Avenue
Waverly, NY
The Home Depot
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Horseheads - D
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Fastenal- Elmira
607-737-9062
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Elmira, NY
Wades Building Supply Inc.
607-359-2466
2 Wall Street
Addison, NY
Valu Home Centers
607-936-9900
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Painted Post, NY
Draper True Value Hdw
(570) 537-6566
5277 Main St
Millerton, PA
Arnot Mall
(607) 739-6000
3300 Chambers Rd
Horseheads, 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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