Low Temperature Calorimetry Studies of Hydrating Portland Cement Pastes.
Low Temperature Calorimetry Studies of Hydrating
Portland Cement Pastes.
Bentz, D. P.
NISTIR 7267; 124 p. October 2005.
cement pastes; low temperature; cements; calorimetry;
building technology; curing agents; freexing; hydration;
This report presents nearly 200 low temperature
calorimetry (LTC) scans performed on hydrating portland
cement pastes between 2002 and 2005. Because the LTC
scans provide valuable information on the percolation of
various size pore networks within the hydrating cement
pastes as well as the quantity of freezable water as a
function of temperature, it was decided to present a
compilation of the plots of all of the LTC results
obtained over the course of several research projects.
Variables include water-cement mass ratio (w/c), curing
time, curing temperature, saturation, and limestone and
alkali additions. Each plot is characterized by the
portland cement used, the mixing solution used, the w/c,
the curing temperature, the measured degree of hydration
(when available), the curing conditions with respect to
saturation, the specimen age when tested, the specimen
mass, the filename of the raw LTC data, and the testing
date of the LTC run. The experimental procedures used to
prepare and evaluate the samples are briefly presented,
along with a set of observations obtained from
interpretation of the numerous individual data sets.