Fibers for Permeability Rye 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.
Woodcraft - Norwalk, CT
215 Westport Ave
LOWE'S OF ORANGEBURG, NY
206 ROUTE 303 ORANGEBURG, NY, 10962
Morales Home Center Express
2800 Third Ave
The Home Depot
839 New York Avenue
Kmart 9420 / Cross Merch
1998 Bruckner Blvd
EXOTIC WOODS USA
698 Fort Salonga Rd
Palmer Ace Hardware
940 Kinderkamack Rd, Charlie Browns Restaurant in Oradell
River Edge, NJ
224 Selleck Street Stamford, CT, 06902
Queens Lumber Company, Inc
34-41 College Point Blvd
The Home Depot
601 South Sprain 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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