Strength and Bond Data for Greek High-Lime Fly Ash Concrete


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Title: Strength and Bond Data for Greek High-Lime Fly Ash Concrete

Author(s): J. Papayianni

Publication: Special Publication

Volume: 91


Appears on pages(s): 367-386

Keywords: bond (concrete to reinforcement); compressive strength; concretes; flexural strength; fly ash; lignite; modulus of elasticity; reinforced concrete.

Date: 2/1/1986

Lignite Fly Ash (LFA) was used in concrete replacing Portland cement at 0, 30, 40, 50, 60, 70, 80, 9 0 and 100%. Properties investigated in concrete prepared with different percentages of LFA were: 1. Compressive and flexural strengths (7, 28 days 3, 6 months 1, 2, 3, 4 and 8 years). Water to cement plus LFA ratios (W/C+F) 0.55, 0.65, 0.75,0.85, 0.95. Concrete slump 40-50mm, 60-70mm, 80-100mm, lOO-150mm, 150-200mm. A total of 10,000 specimens were tested for compressive strength at various ages during 5 years. 2. Modulus of elasticity according to ASTM C469-65. 3. Bond between steel-concrete according to ASTM C234-71. The test data showed that LFA can replace Portland cement when used as a separate batch material up to 40% in reinforced concrete and up to 70% in plain concrete.