Fibers for Permeability New Hartford 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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McQUADE & BANNIGAN INC
(315) 724-7119
1300 STARK STREET UTICA, NY, 13502
Utica, NY
Ace Hardware of Rome
(315) 336-7800
115 Black River Blvd
Rome, NY
Kime True Value Hdwe
(315) 363-8302
21 Seneca Ave
Oneida Castle, NY
The Home Depot
(315)797-5300
545 French Road
New Hartford, NY
Herkimer - Auth Hometown
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325 E Albany St
Herkimer, NY
Fastenal- Utica
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2150 Oriskany Street West Utica, NY, 13502
Utica, NY
NORTHERN SAFETY
232 INDUSTRIAL PARK DRIVE FRANKFORT, NY, 13340
Frankfort, NY
Ilion True Value Hdw.
(315) 894-5274
39 W Clark St
Ilion, NY
Rome General Lbr Co Inc
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529 Erie Blvd W
Rome, NY
Kmart 4362 / Cross Merch
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4645 Commercial Dr
New Hartford, 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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