Fibers for Permeability Watertown 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.
O D Greene Ace Home Center
10799 U S Route 11
522 Bradley Street Watertown, NY, 13601
Farney's Inc Hme/Bldg Ctr
11099 NYS Rte 26, .25 mile south of McDonalds/Rite Aid on NYS RT 26
Ny Route 411
La Fargeville, NY
Salmon Run Mall
I-81 & Arsenal Rt 3
Noble Ace Hardware
531 State St
Reinman's Dept Store Inc
435 Riverside Dr
LOWE'S OF WATERTOWN, N.Y.
20828 NEW YORK STATE, RTE 3 WATERTOWN, NY, 13601
Knapps True Value Hdw.
13263 Us Rt 11 - Main St
Adams Center, NY
The Home Depot
391 College Heights
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.
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