Fibers for Permeability Woodside 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.
Hudson Supply of Newark LLC
135 Lafayette St, Penn Station and Devils Arena
Herman's Has Everything
1070 Linwood Street Brooklyn, NY, 11208
Prince Lumber Company
404 West 15th St
New York, NY
Bergenfield - Sears Hardware Stores
450 S Washington Ave
Lake Success S/C
1400 Union Tpke
New Hyde Park, NY
607 18th Street
Closure Systems, Inc.- Hackensack
277 Lodi Street Hackensack, NJ, 07601
KASS INDUSTRIAL SUPPLY/Bronx
1715 Washington Ave Bronx, NY, 10457
Five Star Lumber & Home Ctrs
210 E Merrick Rd
Valley Stream, NY
Cross County S/C
Rte 87(Ny St) & Cross Ct Pkwy
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.
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