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Author: Jeffrey Bullard
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1. Electrical Resistivity Measurements in Cementitious Systems:
Observations of Factors that Influence the Measurements
Robert Spragg, Chiara Villani, Kenneth Alan Snyder, Dale P Bentz, Jeffrey W Bullard, Jason Weiss
The electrical resistivity of concrete is increasingly measured as an indicator of its fluid transport properties, for use in quality control or for service life prediction. While electrical tests have the advantage of being easy and rapid to perfo ...
2. Using a Saturation Function to Interpret the Electrical Properties of Partially Saturated Concrete
William Jason Weiss, Kenneth Alan Snyder, Jeffrey W Bullard, Dale P Bentz
Electrical properties are frequently measured in the concrete construction industry as a part of mixture qualification and quality control testing. While there are several factors that influence the electrical response of concrete, one of the most i ...
3. Paving the Way for a More Sustainable Concrete Infrastructure: A Vision for Developing a
Comprehensive Description of Cement
Special Publication (NIST SP)
Joseph J Biernacki, Jeffrey W Bullard, Constantiner Constantiner, Richard Meininger, Maria Juenger, Josephine H Cheung, William Hansen, R. Douglas Hooton, Andreas Luttge, Jeffrey J. Thomas
Hydration of portland cement is the cornerstone of the process responsible for microstructure
development in concrete and
ultimately controls the kinetics of all materials properties that make concrete such a useful
product for society (propert ...
4. Measurement Science Needs for the Expanded Use of Green Concrete: Workshop Summary Report
Technical Note (NIST TN)
Kenneth Alan Snyder, Dale P Bentz, Jeffrey W Bullard, Chiara F Ferraris, Nicos Martys, Paul E Stutzman
In July 2012, NIST conducted the Green Concrete Workshop to bring together stakeholders from the
concrete construction industry and identify critical needs for the expanded use of industrial by-
product materials, such as fly ash and slag, in conc ...
5. An Argument for Virtual Testing in the Cement Plant
Pichet Sahachaiyunta, Kittisak Pongpaisanseree, Jeffrey W Bullard, Paul E Stutzman, Edward Joseph Garboczi, Wilasa Vichit-Vadakan
The cement industry is moving toward customized commodity products, requiring plants that were built to consistently produce
thousands of tons of one product each day to now be versatile enough to fine-tune multiple products that meet both industry ...
6. Mechanisms of Cement Hydration
Jeffrey W Bullard, Hamlin M Jennings, Richard A Livingston, Andre Nonat, George W Scherer, Jeffrey S Schweitzer, Karen L Scrivener, Jeffrey J. Thomas
Several detailed reviews have been written about the kinetics of cement hydration . In this review, focus is placed on a number of
recent advances in understanding the principal mechanisms that govern the rate of hydration and microstructure develo ...
7. Modeling and Simulation of Cement Hydration Kinetics and Microstructure Development
Jeffrey Thomas, Joseph J Biernacki, Jeffrey W Bullard, Shashank Bishnoi, Jorge S Dolado, George W Scherer, Andreas Luttge
This review endeavors to summarize the past 40 years or so of progress towards the development of mathematical models for
understanding and predicting cement hydration behavior. A complete and accurate model of hydration would enable materials
8. Why Alite Stops Hydrating Below 80% Relative Humidity
Robert J Flatt, George W Scherer, Jeffrey W Bullard
Cement hydration continues to have an intriguing character, surrounded as it is by a number of intensively debated questions.
Among the unresolved issues is the reason why hydration stops at a relative humidity of about 80%, even though the system ...
9. From Electrons to Infrastructure: Engineering Concrete From The Bottom Up
Hamlin M. Jennings, Jeffrey W Bullard
We argue that only an approach rooted in fundamental, mechanistic models of concrete materials offers a viable path for handling
the enormous number of new variables that are being introduced as new materials are added to the design space, and as n ...
10. Coupling Thermodynamics and Digital Image Models to Simulate Hydration and Microstructure Development of Portland Cement
Jeffrey W Bullard, Barbara Lothenbach, Paul E Stutzman, Kenneth Alan Snyder
Equilibrium thermodynamic calculations, coupled to a kinetic model for the dissolution rates of clinker phases, have been used in
recent years to predict the time-dependent phase assemblage in hydrating cement pastes. We couple this approach to a ...