Understanding Proton Dynamics in Cement Pastes – Niels Bohr Institute - University of Copenhagen

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Niels Bohr Institute > Calendar > Activities 2013 > Understanding Proton D...

Understanding Proton Dynamics in Cement Pastes

Cement can be used for construction to build skyscrapers and bridges to dental applications to fill cavities in caries infected teeth. These materials start as dried powders that are mixed to a liquid forming a paste that solidifies and hardens producing a strong binding material. The key factor in the setting process is the formation of hydrogen bonds, which are the source of the long-term strength of cement materials. However, as the resulting material is porous liquid is also trapped in the pores and understanding how it moves into the structure is fundamental to comprehend durability.

The high scattering cross section of hydrogen compared to the other elements present in the cement, Al, Si, Ca, O, …, makes neutron scattering ideal for studying liquid mobility.

In this talk I will present results on blended construction cement pastes and dental glass ionomer cements obtained using Quasi-Elastic Neutron Scattering at different length and time-scales.

Master's thesis by Johan Jacobsen