Use of bench-top NMR to measure the density, composition and desorption isotherm of C-S-H in cement paste
Muller, ACA, Scrivener, KL, Gajewicz, AM and McDonald, PJ (2013) Use of bench-top NMR to measure the density, composition and desorption isotherm of C-S-H in cement paste Microporous and Mesoporous Materials.
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H nuclear magnetic resonance (NMR), supported by a measurement of the degree of hydration using X-ray diffraction, has been used to fully characterise the nano-scale porosity and composition of calcium-silicate-hydrate (C-S-H), the active component of cement. The resultant "solid" density and composition are ρ = 2.68 g/cm; (Ca). (Si,Al)O. (HO) for an underwater cured, never-dried cement paste with an initial mix water-to-cement ratio of 0.4 after 28 days of hydration. In addition, the first pore-type resolved desorption isotherm of cement that shows the location of water as a function of relative humidity has been measured. Critical to our results is verification of the assignment of the different NMR spin-spin relaxation time components. These have been corroborated with conventional analyses. The new methodology is key to enabling design of cement pastes with lower environmental impact. © 2013.
|Divisions :||Faculty of Engineering and Physical Sciences > Physics|
|Identification Number :||10.1016/j.micromeso.2013.01.032|
|Additional Information :||NOTICE: this is the author’s version of a work that was accepted for publication in Microporous and Mesoporous Materials. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published online in Microporous and Mesoporous Materials, February 2013, DOI 10.1016/j.micromeso.2013.01.032.|
|Depositing User :||Symplectic Elements|
|Date Deposited :||05 Apr 2013 17:10|
|Last Modified :||23 Sep 2013 20:04|
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