Fibers for Permeability Mahopac 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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Fastenal- Buchanan
914-736-0156
12B White St Buchanan, NY, 10511
Buchanan, NY
RIDGEFIELD SUPPLY CO
(203) 438-2626
29 PROSPECT STREET RIDGEFIELD, CT, 06877
Ridgefield, CT
Buchanan Home Center, Inc
914-737-1912
3119 Albany Post Rd
Buchanan, NY
The Home Depot
(845)298-9200
1570 Route 9
Wappingers Falls, NY
Kmart 9414 / Cross Merch
(914) 243-3685
Rte 118 355 Downing
Yorktown Hts, NY
Williams Lumber Inc
(845) 221-2751
908 Route 82
Hopewell Junction, NY
LOWE'S OF NEWBURGH, NY
845 567-2860
1239 ROUTE 300 NEWBURGH, NY, 12550
Newburgh, NY
Keough's Paint & Hardware
203-544-8379
1 Ethan Allen Highway
Ridgefield, CT
Rim Supply
845-565-5220
2 Johnes Street
Newburgh, NY
Jefferson Valley Mall
(914) 248-2500
600 Lee Blvd
Yorktown Hts, 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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