Effects of High-Lime Fly Ash Content on Water Demand, Time of Set, and Compressive Strength of Concrete

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Title: Effects of High-Lime Fly Ash Content on Water Demand, Time of Set, and Compressive Strength of Concrete

Author(s): Tarun R. Naik and Bruce W. Ramme

Publication: Materials Journal

Volume: 87

Issue: 6

Appears on pages(s): 619-626

Keywords: compressive strength; concretes; fly ash; fresh concretes; tests; lime fly ash; mix proportioning; setting (hardening); water-cement ratio; workability; Materials Research

Date: 11/1/1990

Abstract:
Presents research performed to report the effects of high-lime (Class C) fly ash on water demand, workability, time of set, and compressive strength of concrete. Tests were carried out on nominal 3000, 4000, and 5000 psi structural grade concrete, utilizing fly ash produced at a Wisconsin power plant. Fly ash replacement improved workability, decreased water demand, and increased strength. The initial and final set times were not significantly different when fly ash replacement was increased to levels of 55 percent.