Author
Maria C.G. Juenger
Other affiliations: Northwestern University, Lawrence Berkeley National Laboratory, University of Texas System
Bio: Maria C.G. Juenger is an academic researcher from University of Texas at Austin. The author has contributed to research in topics: Cementitious & Fly ash. The author has an hindex of 36, co-authored 101 publications receiving 4686 citations. Previous affiliations of Maria C.G. Juenger include Northwestern University & Lawrence Berkeley National Laboratory.
Topics: Cementitious, Fly ash, Portland cement, Cement, Pozzolan
Papers published on a yearly basis
Papers
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TL;DR: In this paper, four promising alternative binders available as alternatives to Portland cement are discussed, namely calcium aluminate cement, calcium sulfoaluminate cements, alkali-activated binders, and supersulfated cements.
1,237 citations
TL;DR: A review of the advances in knowledge provided by research in these areas can be found in this paper, emphasizing the impact of the research on the field and emphasizing the benefits of these advances.
614 citations
TL;DR: In this paper, a review of emerging supplementary cementitious materials (SCM) sources is presented, along with new developments in characterizing and qualifying SCMs for use and improved knowledge of SCM on long-term concrete performance and durability.
386 citations
TL;DR: An up-to-date review of AM as it relates to the construction industry, identifies the trend of AM processes and materials being used, and discusses related methods of implementing AM and potential advancements in applications of AM.
251 citations
TL;DR: In this paper, the authors used the activation energy (E subscript a) calculation methods used to accurately predict the thermal gradients in concrete, with a particular emphasis on models characterizing the temperature sensitivity of hydration in cementitious materials.
Abstract: This paper examines activation energy (E subscript a) calculation methods used to accurately predict the thermal gradients in concrete. A particular emphasis is placed on models characterizing the temperature sensitivity of hydration in cementitious materials. The Arrhenius equation, which requires selecting a specific E subscript a, is the most commonly used method to define the temperature sensitivity of the reaction. The authors use Arrhenius with three different computational methods to determine the E subscript a of different cementitious pastes. These methods include: 1) a single linear approximation, that calculates the reaction rate based on a first-order differential rate equation, 2) an incremental method that calculates the rate incrementally over a specific time period, and 3) an ASTM C 1074-based modified method that uses isothermal calorimetry data instead of compressive strength. The research takes a detailed look at the advantages and disadvantages of the computational methods, as each is applied to a different cementitious paste. From the results, the authors are able to develop a systematic computational method for characterizing E subscript a that accounts for how temperature affects the overall hydration rate in cementitious materials.
214 citations
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31 Oct 2001
TL;DR: The American Society for Testing and Materials (ASTM) as mentioned in this paper is an independent organization devoted to the development of standards for testing and materials, and is a member of IEEE 802.11.
Abstract: The American Society for Testing and Materials (ASTM) is an independent organization devoted to the development of standards.
3,792 citations
TL;DR: In this article, a new analysis tool was developed to quantify the experimentally observed changes in morphology of portlandite, allowing the calculation of the relative surface energies of the crystal facets.
2,498 citations
TL;DR: The current state of knowledge of cement hydration mechanisms is reviewed, including the origin of the period of slow reaction in alite and cement, the nature of the acceleration period, the role of calcium sulfate in modifying the reaction rate of tricalcium aluminate, the interactions of silicates and aluminates, and the kinetics of the deceleration period as mentioned in this paper.
1,437 citations
TL;DR: In this paper, the synthesis of alkali-activated binders from blast furnace slag, calcined clay (metakaolin), and fly ash is discussed, including analysis of the chemical reaction mechanisms and binder phase assemblages that control the early-age and hardened properties of these materials.
Abstract: The development of new, sustainable, low-CO2 construction materials is essential if the global construction industry is to reduce the environmental footprint of its activities, which is incurred particularly through the production of Portland cement. One type of non-Portland cement that is attracting particular attention is based on alkali-aluminosilicate chemistry, including the class of binders that have become known as geopolymers. These materials offer technical properties comparable to those of Portland cement, but with a much lower CO2 footprint and with the potential for performance advantages over traditional cements in certain niche applications. This review discusses the synthesis of alkali-activated binders from blast furnace slag, calcined clay (metakaolin), and fly ash, including analysis of the chemical reaction mechanisms and binder phase assemblages that control the early-age and hardened properties of these materials, in particular initial setting and long-term durability. Perspectives fo...
862 citations