Predicting One-Day, Three-Day, and Seven-Day Heat of Hydration of Portland Cement

Abstract

This paper aims to develop empirical equations predicting one-day, three-day, and seven-day heat of hydration of portland cement at 23°C and water to cement ratio of 0.5. Isothermal conduction calorimetry was implemented to measure the heat of hydration of portland cements for up to seven days. X-ray diffraction was used to study the mineralogy and also for quantification of phase composition of portland cements. Particle size distribution of cements was measured using a laser scattering particle size analyzer. Blaine fineness of cements was measured using a Blaine permeability apparatus in accordance with the standard test methods for the fineness of hydraulic cement by air-permeability apparatus procedure. The results indicate that the one-day, three-day, and seven-day heat of hydration of a specific portland cement ground to different finenesses is changing linearly with the cement mean particle size. This research shows that the mean particle size is a suitable measure of cement fineness to correlate with major phases of portland cement (