Fibers for Permeability Ballston Spa 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.

Local Companies

Lowe's
(518) 786-3350
790 Loudon Road
Latham, NY
Mechanicville Co Living Center
518-664-7661
133 N Central Avenue
Mechanicville, NY
Tanner Lumber Inc.
(518) 883-3012
4 N Second Ave
Broadalbin, NY
The Home Depot
(518)782-9867
579 Troy-Schenectady Rd
Latham, NY
Wilton Mall
(518) 583-8500
3065 Route 50
Saratoga Spgs, NY
Shaker Hardware
(518) 785-9052
607 Watervliet Shaker Rd
Latham, NY
Lowe's of Amsterdam
518-954-2400
4825 State Highway 30 Amsterdam, NY, 12010
Amsterdam, NY
Phillips Hardware
518-459-2300
42 Saratoga Ave
Waterford, NY
The Home Depot
(518)348-0158
4 Halfmoon Crossing Blvd
Halfmoon, NY
The Home Depot
(518)388-9121
2500 Cambridge Rd
Schenectady, 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

Related Articles