Fibers for Permeability Niagara Falls 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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RC Tonewoods
716-873-6043
1109 Military Road
Buffalo, NY
Lowe's
(716) 831-5990
1659 Niagara Falls Boulevard
Amherst, NY
Hectors Hardware
716-689-8333
5355 Transit Road
Williamsville, NY
Drews True Value Hardware
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Buffalo, NY
Kmart 3415 / Cross Merch
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Advantage Trim & Lumber Co
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Rockler Woodworking and Hardware #11
(716) 631-8922
5085 Transit Rd
Buffalo, NY
Newfane Lumber & Mfg Co Inc
716-434-5577
554 Ohio Street
Lockport, NY
Island True Value Hdwe.
(716) 773-9060
1889 Whitehaven Rd
Grand Island, NY
The Home Depot
(716)639-9600
2065 Niagara Falls Blvd
Amherst, NY
Data Provided by:
  

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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