Fibers for Permeability Clifton Park 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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LOWE'S OF GLENMONT, NY
518 436-6020
271 ROUTE 9 WEST GLENMONT, NY, 12077
Glenmont, NY
LOWE'S OF SARATOGA SPRINGS, NY
518 583-3777
10 LOWE'S DRIVE SARATOGA SPRINGS, NY, 12866
Saratoga Springs, NY
The Home Depot
(518)782-9867
579 Troy-Schenectady Rd
Latham, NY
Lowe's
(518) 952-8789
93 Freemans Bridge Road
Glenville, NY
Kmart 4383 / Cross Merch
(518) 456-7701
1860 Central Ave
Albany, NY
Lowe's of Amsterdam
518-954-2400
4825 State Highway 30 Amsterdam, NY, 12010
Amsterdam, NY
Lowe's of Glenville
518-952-8789
93 Freemans Bridge Rd Glenville, NY, 12302
Glenville, NY
Phillips Hardware
518-346-4383
1729 Union St
Schenectady, NY
The Home Depot
(518)283-1819
600 N Greenbush Rd
Rensselaer, NY
Lowe's
(518) 348-2940
476 Route 146
Halfmoon, 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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