Permeability of concrete containing large amounts of fly ash

Journal Article · Sat Jan 01 04:00:00 EST 1994 · Cement and Concrete Research; (United States)

DOI:https://doi.org/10.1016/0008-8846(94)90011-6· OSTI ID:7078706

Naik, T R; Singh, S S; Hossain, M M ^[1]

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1. Univ. of Wisconsin, Milwaukee, WI (United States). Dept. of Civil Engineering and Mechanics

This study was carried out to evaluate the influence of addition of a Class C fly ash on concrete permeability. An air entrained reference concrete mixture without fly ash was proportioned to have a 28-day strength of 41 MPa. Concrete mixtures were also proportioned to have cement replacement with fly ash in the range of 0--70% by weight. For each concrete mixture, compressive strength, chloride permeability, air permeability, and water permeability were determined. Air and water permeability were evaluated by using the Figg method. Chloride permeability of the concrete was measured in accordance with the ASTM C 1202. At ages up to 28-day, no-fly ash concrete attained lower air permeability compared to high-volume fly ash concretes. At 91 days, the mixture having 50% cement replacement exhibited the lowest air permeability. The same was true for water permeability also. In general, addition of fly ash caused a decrease in chloride permeability of concrete up to 50% cement replacement.

• OSTI ID: 7078706
• Journal Information: Cement and Concrete Research; (United States), Journal Name: Cement and Concrete Research; (United States) Vol. 24:5; ISSN 0008-8846; ISSN CCNRAI
• Country of Publication: United States
• Language: English

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AEROSOL WASTES
AIR
ASHES
BUILDING MATERIALS
CHLORIDES
CHLORINE COMPOUNDS
COMBUSTION PRODUCTS
COMPRESSION STRENGTH
CONCENTRATION RATIO
CONCRETES
DIFFUSION
FLUIDS
FLY ASH
GASES
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
MATERIALS
MECHANICAL PROPERTIES
OXYGEN COMPOUNDS
PERMEABILITY
RESIDUES
WASTE PRODUCT UTILIZATION
WASTES
WATER