Carbonation of Portland Bast Furnace Slag Cement Concrete With Fly Ash


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Title: Carbonation of Portland Bast Furnace Slag Cement Concrete With Fly Ash

Author(s): Jan Bijen, Gert Van Der Wegen, and Rico Vam Selst

Publication: Special Publication

Volume: 114


Appears on pages(s): 645-668

Keywords: blast furnace slag; carbonation; compressive strength; concretes; exposure; fly ash; portland cements; portland-slag cements; Materials Research

Date: 5/1/1989

An extensive research program was performed on the rate of carbonation of concrete produced with ordinary portland cement, portland blast furnace slag cement, and portland fly ash cement, both with replacement of cement by fly ash and without. After various periods of wet curing, concrete samples were exposed to various exposure conditions. The wet curing ranged from 1 to 90 days, the exposure concerns outdoor sheltered from rain and at 20 C, 65 percent relative humidity in the laboratory. For the various exposure conditions, a relation has been found with respect to the carbonation rate as a function of the compressive strength at 7 days or at 28 days per type of cement and for all types of cement when the lime content is involved. Results of measurements over a period up to 2 years are presented.