Fibers for Permeability Mastic 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.
Costello's Ace Hardware
246 Smithtown Blvd, CVS
ABC Supply Co.,Inc/Bohemia
2950 Veterans Memorial Hwy Bohemia, NY, 11716
6281 Rte 25 A
Wading River, NY
The Home Depot
346 Middle Country Rd
Shirley - Sears Hardware Stores
1019 Montauk Hwy
Oakdale Paint & Hardware
1460 Montauk Hwy
91 W Montauk Hwy
Hampton Bays, NY
DYNAMITE TOOL CO
1551 SMITHTOWN AVENUE BOHEMIA, NY, 11716
Ferreteria Berrios Inc
Av Comerio #25 Sierra Bayamon
Kmart 3862 / Cross Merch
5151 Sunrise Hwy
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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