Fibers for Permeability East Syracuse 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.
4101 New Court Ave Syracuse, NY, 13206
T&K Lumber Co, Inc.
170 Route 5 West Elbridge, NY, 13060
5912 N Burdick St
East Syracuse, NY
Valu Home Center #51
3803 North Brewerton Rd
North Syracuse, NY
Kmart 3115 / Cross Merch
3469 Erie Blvd E
De Witt, NY
5701 East Circle Drive
3856 State Route 31 Liverpool, NY, 13090
Tully Building Supply
315 696 8984
24 Onondaga St Tully, NY, 13159
Valu Home Center #52
123 Shop City Plaza
Great Northern Mall
4155 Rt 31
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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