Volume Changes on Setting and Curing of Cement Paste and Concrete From Zero to Seven Days

ABOUT THE 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.

International Concrete Abstracts Portal

  


Title: Volume Changes on Setting and Curing of Cement Paste and Concrete From Zero to Seven Days

Author(s): Floyd O. Slate and Ramon E. Matheus

Publication: Journal Proceedings

Volume: 64

Issue: 1

Appears on pages(s): 34-39

Keywords: age; cement pastes; concretes; cracking (fracturing); curing; expanding cements; expansion; set; shrinkage; volume changes.

Date: 1/1/1967

Abstract:
Unrestrained bulk volume changes were measured by displacement of liquids in which the specimens were submerged. Cement paste and concrete stored under water from the time of molding always showed volume increases of from 0.1 to 1.5 percent, with almost the entire change occurring during the first day. Cement paste and concrete immersed in mineral oil, to prevent gain or loss of water, always showed by 7 days volume decreases of from 0.6 to 1.7 percent, with a decreasing rate of change throughout the 7 day period (cement pastes, but not concretes, showed expansion up to 6 hr or even up to 1 day, followed by contraction). When a calcium sulfoaluminate expansive compound was added, expansion was increased for both cement paste and concrete under water, no change occured for concrete under mineral oil, and greater initial expansion followed by greater contraction occurred for cement paste under oil.