Fibers for Permeability Queens Village 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.
ACE TOOL REPAIR INC
2201 WANTAGH AVE WANTAGH, NY, 11793
200 Saw Mill River Rd Yonkers, NY, 10701
Cross Bay Hardware
158-18 Cross Bay Blvd
Howard Beach, NY
The Home Depot
11220 Rockaway Blvd
South Ozone Park, NY
Hicksville - A
195 N Broadway
607 18th Street
104 Mott St Oceanside, NY, 11572
MORGAN TOOL RENTALS INC
500 MORGAN AVENUE BROOKLYN, NY, 11222
Kings Material Company Inc.
3707 15th Avenue
Kmart 9419 / Cross Merch
66-26 Metropolitan Ave
Middle Vlg, NY
Data Provided by:
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