Fibers for Permeability Bayside 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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S & E Building Matls Co
(718) 436-4923
744 Mcdonald Ave, between Ditmas Ave and Cortelyou Rd.
Brooklyn, NY
Herman's Has Everything
800-273-4376
1070 Linwood Street Brooklyn, NY, 11208
Brooklyn, NY
Andre's Hardware
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Bronxville, NY
Canarsie Lumber, Inc
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Kmart 9416 / Cross Merch
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Monster Woodshop
888-506-6678
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Fastenal- Hicksville
516-942-2640
73 Bloomingdale Rd Hicksville, NY, 11801
Hicksville, NY
Ludewig's Hardware
201-836-4991
321 Queen Anne Road
Teaneck, NJ
Modern Paint & Hardware Corp
914-632-8060
316 Huguenot St
New Rochelle, NY
The Home Depot
(718)358-9600
131-35 Avery Avenue
Flushing, 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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