Title: Measuring Non-Drying Bulk Shrinkage of Cement Paste and Mortar Using Archimedes' Principle
Author(s): K. S. Douglas and K. C. Hover
Publication: Symposium Paper
Appears on pages(s): 39-56
Keywords: Archimedes' principle; autogenous shrinkage; buoyancy; shrinkage; volumetric measurement
This paper evaluates a test method for measuring bulk, autogenous volume changes in cement paste and mortar. In this test method, paste and mortar were sealed in latex membranes and submerged in water. The weight of the specimens was recorded periodically, both in air and submerged in water, and their volume change was calculated using Archimedes' principle. Several sources of error in the test method were identified, and measures were taken to account for some of this error. It was concluded that the experimental error for this test may be quite substantial as the test duration increases, and therefore this test method is most suited for measuring the early age volume changes of cement paste and mortar.