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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Artificial Carbonation of Concrete
Author(s): Henry T. Toennies
Publication: Journal Proceedings
Appears on pages(s): 737-756
Abstract:Research to develop a process of artifical carbonation of concrete masonry units is described. A process cf hastening carbonation (preshrinking) of masonry units would eliminate subsequent atmospheric carbonation and attendant shrinkage after the units were in a wall. Research was prompted by the feasibility of artifically carbonating concrete masonry units, using as a source of carbon dioxide the flue gases from combustion in steam boilers adjunct to steam curing. Flue gas carbonation effected reductions in early-age drying shrinkage of masonry units. Reductions varied with carbonation time, temperature, and precarbonation moisture condition of units. Greatest reductions accompanied treatment at elevated temperatures immediately after com-pletion of steam curing. Early-age shrinkage benefits due to carbonation were reflected in total shrinkage with time during 10 months of atmospheric exposure. The effect of carbonation on other measured properties of concrete mason ry appeared minor. Physical
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