Fibers for Permeability Long Island City 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.
Tsigonia Paint & Hardware
464 Communipaw Ave
Jersey City, NJ
1600 Stillwell Bronx, NY, 10461
Central Ave Ace Home Center
352 Central Ave
East Orange, NJ
The Home Depot
2970 Cropsey Avenue
Kmart 9420 / Cross Merch
1998 Bruckner Blvd
607 18th Street
15 East Union Avenue East Rutherford, NJ, 07073
East Rutherford, NJ
104 Mott St Oceanside, NY, 11572
Modern Paint & Hardware Corp
316 Huguenot St
New Rochelle, NY
Kmart 4248 / Cross Merch
2875 Richmond Ave
New Sprngvle, 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.
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