Fibers for Permeability Shirley 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.
91 W Montauk Hwy
Hampton Bays, NY
Comercial Berrios Inc
Ferreteria Maderas 3-c Inc.
Calle Segarra Final Sector Bechara
San Juan, NY
The Home Depot
346 Middle Country Rd
4 Smith Haven Mall
Lake Grove, NY
Costello's Ace Hardware
246 Smithtown Blvd, CVS
Centereach True Value Hardware
1408 Middle Country Rd
Ferreteria Berrios Inc
Av Comerio #25 Sierra Bayamon
Agnew & Taylor True Value
501 Hawkins Ave
Lake Ronkonkoma, NY
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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