Fibers for Permeability Brewster 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.

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Ring's End Lumber/New Milford
(860) 355-5566
Rte 7 140 Danbury Road New Milford, CT, 06776
New Milford, CT
Ace Hardware
(203) 268-0342
246 Main St, Located in the old Frank's Nursery, Rt.25
Monroe, CT
Weed & Duryea Do it Best Lbr
203-966-2673
21 Grove Street
New Canaan, CT
The Home Depot
(203)730-9600
114 Federal Road
Danbury, CT
The Home Depot
(845)279-9669
80 Independence Way SE
Brewster, NY
Fastenal- Fishkill
845-897-4721
115 Old Route 9 Fishkill, NY, 12524
Fishkill, NY
TOOL NUT
(914) 621-0200
247 MAHOPAC AVENUE YORKTOWN HEIGHTS, NY, 10598
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Ace Hardware of Newtown
(203) 270-3800
5 Queen St, Carluzzi's Super Market
Newtown, CT
Kelloggs & Lawrence
914-232-3351
26-30 The Parkway
Katonah, NY
The Home Depot
(860)350-0304
104 Danbury Road
New Milford, CT

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.

Click here to read full article from The Concrete Producer

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