Evaluating the early age performance of portland cement under differing hydration conditions

Author(s): C. Ishee and A. Boyd
Paper category: conference
Book title: Microstructural-related Durability of Cementitious Composites
Editor(s): Guang Ye, K. van Breugel, Wei Sun and Changwen Miao
Print ISBN: 978-2-35158-129-2
e-ISBN: 978-2-35158-123-0
Publisher: RILEM Publications SARL
Publication year: 2009
Pages: 161 – 168
Total Pages: 8
Language: English

Abstract: The objective of this work was to examine the hydration performance of Portland cement with variations in Tricalcium Silicate and Tricalcium Aluminate proportions. The performance and durability of Portland cement is affected by its particle size, chemistry, morphology, water availability, thermodynamic reaction rates, and age at which the materials are tested. Portland cement has many phases that all react simultaneously depending on many different factors. How the different phases react while part of the entire system, including how the reactions affect those of other components in the system, was investigated in order to determine how true cement can be expected to behave during hydration. Laboratory research focused on the establishment of early age hydration and formation of the microstructure; techniques for characterizing the hydration and formation of microstructure; effects of time dependent phenomena and aging on microstructure as it relates to durability; and the microstructure based durability index as it relates to strength, shrinkage, and heat production. The goal of this research was to provide the basis for a predictive model capable of predicting the phase composition of a hydrated Portland cement under specified conditions.
Keywords: Portland cement, particle size, activation energy, length change, morphology

Online publication: 2012-05-16
Publication Type: full_text
Public price (Euros): 0.00