Fibers for Permeability Rochester 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.
300 Owens Road
LOWE'S OF HENRIETTA, N. Y.
2350 MARKETPLACE DRIVE ROCHESTER, NY, 14623
Crown Electric Supply Co Inc
75 Route 104
Union Hill, NY
2155 Penfield Road
Kmart 3295 / Cross Merch
3049 W Ridge Rd
Woodcraft - Rochester
LOWE'S OF GREECE, NY
3150 WEST RIDGE ROAD ROCHESTER, NY, 14626
LOWE'S OF WEBSTER, NY
900 FIVE MILE LINE ROAD WEBSTER, NY, 14580
Avon True Value & Auto
275 E Main Street
The Home Depot
1111 E Ridge Rd
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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