Fibers for Permeability Gloversville 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.
25 Broadway St PO Box 544 Fonda, NY, 12068
54 Dutchtown Plaza, Intersection of NYS Rts. 5 & 10
Palatine Bridge, NY
Tanner Lumber Inc.
4 N Second Ave
Gloversville True Value Hardware
86-88 E Fulton St
The Home Depot
135 Hanaford Plaza
4825 State Highway 30
Lowe's of Amsterdam
4825 State Highway 30 Amsterdam, NY, 12010
Amsterdam Riverfront True Value Hardware
1000 River Front Center
L. J. Hand Farm Center
1431 State Hwy 161
Fort Plain True Value Hardware
12 Willett St
Fort Plain, 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.
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