Fibers for Permeability Lockport 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.
Rockler Woodworking and Hardware #11
5085 Transit Rd
1659 Niagara Falls Boulevard
Valu Home Center #31
396 Kenmore Ave
Stevenson True Value Hardware
2535 Youngstown Lockport Rd
The Home Depot
300 Thruway Plaza Dr
1109 Military Road
8150 Transit Road
Fastenal- Niagara Falls
6000 Packard Rd Suite #200 Niagara Falls, NY, 14304
Niagara Falls, NY
Valu Home Center
3275 Sheridan Dr
Ed Youngs True Value Hdw.
5641 Main St
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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