Department Events

Events

  • May
    16

    SEGIM Seminar: Claire White

    McCormick - Civil and Environmental Engineering

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    Uncovering and Optimizing the Chemical Mechanisms in Alkali-activated Materials and Related Engineering Systems

    Abstract
    With the world facing a climate crisis due to increasing CO2 emissions, there is pressing need to develop and implement sustainable construction/engineering materials across the globe. Alkali-activated materials (AAMs) are one such sustainable alternative to conventional ordinary Portland cement (OPC) concrete; however, questions remain regarding the long-term performance of AAMs which is hampering implementation of this sustainable solution in the construction industry. Furthermore, for OPC-based concrete, the use of extensive clinker substitution to reduce CO2 emissions has led to changes to the underlying chemistry of the main binder gel, where it is uncertain how these novel supplementary cementitious materials augment the long-term properties (e.g., gel stability and pore structure) of the cement paste.

    Here, I will outline how fundamental materials research is addressing the long-term performance unknowns of AAMs and certain OPC-based systems, where we are linking key experimental techniques with atomistic and larger length scale simulations. To assess gel/binder stability in Ca-rich AAMs, we have used density functional theory (DFT) and synchrotron-based X-ray pair distribution function (PDF) analysis to investigate the influence of alkali substitution on the structure and thermodynamics of calcium-alumino-silicate-hydrate (C-A-S-H) gel. The results provide important new information on the impact of alkali substitution in this gel system and insight on the structural arrangements present in sodium-substituted C-A-S-H gels (C-(N)-A-S-H). Moreover, we have (i) uncovered a mechanism that mitigates microcracking in alkali-activated slags (i.e., a C-(N)-A-S-H gel system) using nanoparticles and (ii) determined how ZnO slows down the hydration reaction in AAMs and OPC-based systems.

    The pore structure of concrete strongly impacts long-term durability, where the pore network and permeability of the gel phase(s) are known to control the rate of degradation. However, the mechanisms controlling the development of the gel/capillary pore network during formation of the binder gel, especially in AAMs, are largely unknown. Here, I will outline our recent progress in the development and implementation of a mesoscale modeling methodology to simulate the formation of the binder gels and pore network in AAMs, along with key experimental data (e.g., small-angle neutron scattering and quasi-elastic neutron scattering) capable of tracking the evolution of the pore network and associated water dynamics immediately after mixing. Given that AAMs can be synthesized using various precursors and activator chemistries, this research, based on a novel computational approach, will enable the prediction of long-term degradation of new cement chemistries in the future.

    Bio
    Claire White is an Assistant Professor at Princeton University in the Department of Civil and Environmental Engineering and the Andlinger Center for Energy and the Environment with associated faculty status in the Department of Chemical and Biological Engineering, the Department of Mechanical and Aerospace Engineering, the Princeton Institute for the Science and Technology of Materials, and the Princeton Institute for Computational Science and Engineering. Professor White completed her graduate studies in 2010 at the University of Melbourne supported by an Australian Postgraduate Award from the Australian government. After receiving her PhD, she worked as a postdoc at Los Alamos National Laboratory and was awarded a Director’s Postdoctoral Fellowship to research the atomic structure of low-CO2 alkali-activated materials. Her research focuses on understanding and optimizing engineering and environmental materials, with an emphasis on controlling the chemical mechanisms responsible for formation and long-term degradation of low-CO2 cements. This research spans multiple length and time scales, utilizing advanced synchrotron and neutron-based experimental techniques, and simulation methodologies. Professor White is the recipient of a number of awards including an NSF CAREER Award and the Howard B. Wentz Jr. Junior Faculty Award (Princeton University), and has been listed several times on the Princeton Engineering Commendation List for Outstanding Teaching.

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    TIME Wednesday, May 16, 2018 at 11:00 AM - 12:00 PM

    LOCATION A230, Technological Institute    map it

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    CONTACT Tierney Acott    tierney-acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Oct
    17

    SPREE Seminar: Arne Johnson & John Lawler

    McCormick - Civil and Environmental Engineering

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Wednesday, October 17, 2018 at 11:00 AM - 12:00 PM

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    CONTACT Tierney Acott    tierney-acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Oct
    19

    EES Seminar: Francis Albarede

    McCormick - Civil and Environmental Engineering

    1:30 PM A230, Technological Institute

    EVENT DETAILS

    TIME Friday, October 19, 2018 at 1:30 PM - 2:30 PM

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    CONTACT Tierney Acott    tierney-acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Oct
    20

    Fall 2018 Career Fair

    McCormick - Civil and Environmental Engineering

    10:00 AM 122, Parkes Hall

    EVENT DETAILS

    TIME Saturday, October 20, 2018 at 10:00 AM - 1:00 PM

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    CONTACT Tierney Acott    tierney-acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Oct
    22

    MPM Seminar: Graham Garfield

    McCormick - Civil and Environmental Engineering

    3:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Monday, October 22, 2018 at 3:00 PM - 4:00 PM

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    CONTACT Tierney Acott    tierney-acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Oct
    24

    SPREE Seminar: Arif Masud

    McCormick - Civil and Environmental Engineering

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Wednesday, October 24, 2018 at 11:00 AM - 12:00 PM

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    CONTACT Tierney Acott    tierney-acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Oct
    26

    EES Seminar: Lynn Schriml

    McCormick - Civil and Environmental Engineering

    2:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Friday, October 26, 2018 at 2:00 PM - 3:00 PM

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    CONTACT Tierney Acott    tierney-acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Oct
    31

    SPREE Seminar: Claire White

    McCormick - Civil and Environmental Engineering

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Wednesday, October 31, 2018 at 11:00 AM - 12:00 PM

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    CONTACT Tierney Acott    tierney-acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Nov
    5

    MPM Seminar: Hernan Levy

    McCormick - Civil and Environmental Engineering

    3:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Monday, November 5, 2018 at 3:00 PM - 4:00 PM

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    CONTACT Tierney Acott    tierney-acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Nov
    9

    EES Seminar: Ed Bouwer

    McCormick - Civil and Environmental Engineering

    2:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Friday, November 9, 2018 at 2:00 PM - 3:00 PM

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    CONTACT Tierney Acott    tierney-acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Nov
    12

    Registration for Winter 2019 begins

    University Academic Calendar

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    EVENT DETAILS

    TIME Monday, November 12, 2018

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    CONTACT Office of the Registrar    nu-registrar@northwestern.edu EMAIL

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  • Nov
    12

    MPM Seminar: Robert Kostelny

    McCormick - Civil and Environmental Engineering

    3:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Monday, November 12, 2018 at 3:00 PM - 4:00 PM

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    CONTACT Tierney Acott    tierney-acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Nov
    14

    SPREE Seminar: Nina Stark

    McCormick - Civil and Environmental Engineering

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Wednesday, November 14, 2018 at 11:00 AM - 12:00 PM

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    CONTACT Tierney Acott    tierney-acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Nov
    19

    MPM Seminar: Karen Layng

    McCormick - Civil and Environmental Engineering

    3:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Monday, November 19, 2018 at 3:00 PM - 4:00 PM

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    CONTACT Tierney Acott    tierney-acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Nov
    21

    Thanksgiving vacation begins 6 p.m.

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    EVENT DETAILS

    TIME Wednesday, November 21, 2018

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  • Nov
    22

    Thanksgiving day

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    EVENT DETAILS

    TIME Thursday, November 22, 2018

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  • Nov
    26

    Fall Classes resume 8 a.m.

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    EVENT DETAILS

    TIME Monday, November 26, 2018

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  • Nov
    26

    MPM Seminar:

    McCormick - Civil and Environmental Engineering

    3:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Monday, November 26, 2018 at 3:00 PM - 4:00 PM

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    CONTACT Tierney Acott    tierney-acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Nov
    30

    EES Seminar: Francis L. de los Reyes III

    McCormick - Civil and Environmental Engineering

    2:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Friday, November 30, 2018 at 2:00 PM - 3:00 PM

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    CONTACT Tierney Acott    tierney-acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Dec
    3

    MPM Seminar: Paul James

    McCormick - Civil and Environmental Engineering

    3:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Monday, December 3, 2018 at 3:00 PM - 4:00 PM

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    CONTACT Tierney Acott    tierney-acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Dec
    5

    SPREE Seminar: Robert Fleischman

    McCormick - Civil and Environmental Engineering

    11:00 AM A230, Technological Institute

    EVENT DETAILS

    TIME Wednesday, December 5, 2018 at 11:00 AM - 12:00 PM

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    CONTACT Tierney Acott    tierney-acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Dec
    7

    EES Seminar: Konrad Koch

    McCormick - Civil and Environmental Engineering

    2:00 PM A230, Technological Institute

    EVENT DETAILS

    TIME Friday, December 7, 2018 at 2:00 PM - 3:00 PM

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    CONTACT Tierney Acott    tierney-acott@northwestern.edu EMAIL

    CALENDAR McCormick - Civil and Environmental Engineering

  • Dec
    8

    Fall classes end

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    EVENT DETAILS

    TIME Saturday, December 8, 2018

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  • Dec
    10

    Fall examinations begin

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    EVENT DETAILS

    TIME Monday, December 10, 2018

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  • Dec
    15

    Fall examinations end

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    EVENT DETAILS

    TIME Saturday, December 15, 2018

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  • Dec
    15

    Winter Break Begins

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    EVENT DETAILS

    TIME Saturday, December 15, 2018

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