Fibers for Permeability Mastic 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

Costello's Ace Hardware
(631) 724-8300
246 Smithtown Blvd, CVS
Nesconset, NY
ABC Supply Co.,Inc/Bohemia
631-285-7710
2950 Veterans Memorial Hwy Bohemia, NY, 11716
Bohemia, NY
Ace Hardware
(631) 929-5095
6281 Rte 25 A
Wading River, NY
The Home Depot
(631)451-0685
346 Middle Country Rd
Coram, NY
Shirley - Sears Hardware Stores
(631) 281-7686
1019 Montauk Hwy
Shirley, NY
Oakdale Paint & Hardware
(631) 567-9705
1460 Montauk Hwy
Oakdale, NY
Shinnecock Hardware
(631) 728-4602
91 W Montauk Hwy
Hampton Bays, NY
DYNAMITE TOOL CO
(631) 563-8181
1551 SMITHTOWN AVENUE BOHEMIA, NY, 11716
Bohemia, NY
Ferreteria Berrios Inc
(787) 786-2095
Av Comerio #25 Sierra Bayamon
Bayamon, NY
Kmart 3862 / Cross Merch
(631) 567-3060
5151 Sunrise Hwy
Bohemia, 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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