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.
DOI:
10.14359/7541
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.