Title:
Cementitious Paste Setting Using Rheological and Pressure Measurements
Author(s):
Sofiane Amziane and Chiara F. Ferraris
Publication:
Materials Journal
Volume:
104
Issue:
2
Appears on pages(s):
137-145
Keywords:
cement paste; rheology; setting time; stress; yield
DOI:
10.14359/18576
Date:
3/1/2007
Abstract:
The measurement of the evolution of mechanical characteristics of concrete during the setting period is needed to control the schedule of construction (for example, placement and formwork removal). The standard Vicat test for measuring the setting time of cement paste and mortar does not provide sufficient information (initial and final set time), for example, to determine the time during which concrete can be pumped or extruded. This study monitored the cement paste setting period through the variation of intrinsic material parameters (yield stress and plastic viscosity) and the hydraulic pressure on the forms. The setting was monitored by rheological (stress growth and shear rate sweep) and hydraulic pressure measurements. The results of these experiments are discussed and compared with the Vicat test for cement paste. It is shown that the proposed tests are more sensitive to the setting evolution of cement paste than the Vicat test and provide useful early age information.