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/Bethel
(203) 797-1212
9 Taylor Ave Bethel, CT, 06801
Bethel, CT
Weed & Duryea Do it Best Lbr
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21 Grove Street
New Canaan, CT
Kelloggs & Lawrence
914-232-3351
26-30 The Parkway
Katonah, NY
Lowe's
(203) 546-6962
67 Eagle Road
Danbury, CT
Jefferson Valley Mall
(914) 248-2500
600 Lee Blvd
Yorktown Hts, NY
Fastenal- Danbury
203-792-2898
10 Federal Rd Danbury, CT, 06810
Danbury, CT
Bethel Handyman Supply
(203) 792-4043
34 Stony Hill Rd, between Target and Big Y
Bethel, CT
Keough's Paint & Hardware
203-544-8379
1 Ethan Allen Highway
Ridgefield, CT
The Home Depot
(845)279-9669
80 Independence Way SE
Brewster, NY
Sears Home Appliance Showroom
(914) 241-2291
360 N Bedford Rd
Mt Kisco, NY

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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