Address book

Contacts

Staff Structures

MARIA CHIARA DALCONI

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Position

Professoressa Associata

Structure

Dipartimento di Geoscienze

Address

VIA G. GRADENIGO, 6 - PADOVA

Telephone

0498279163

E-mail

mariachiara.dalconi@unipd.it

Notices

Office hours

  • at Diaprtiemto di Geoscienze, secondo piano, stanza 02-052
    Disponibile tutti i giorni lavorativi previo accordo via e-mail

Teachings

Publications

RECENT ARTICLES PUBLISHED IN INTERNATIONAL JOURNALS

1. Bellotto, M., Artioli, G., Dalconi, M.C., Corso, R., (2018). On the preparation of concentrated gypsum slurry to reuse sulfate-process TiO2 byproduct stream. Journal of Cleaner Production Vol. 195, p. 1468-1475
2. Valentini, L., Contessi, S., Dalconi, M.C., Zorzi, F., Garbin, E., (2018). Alkali-activated calcined smectite clay blended with waste calcium carbonate as a low-carbon binder. Journal of Cleaner Production, vol. 184, p. 41-49.
3. Ferrari G., Valentini L., Russo V., Dalconi M.C., Favero M., Artioli G., (2017). Improving the performance of PCE superplasticizers in early stiffening Portland cement. CONSTRUCTION AND BUILDING MATERIALS, vol. 130, p. 83-91, doi: 10.1016/j.conbuildmat.2016.11.015
4.Piccoli I., Chiarini F., Corlett P., Furlan L., Lazzaro B., Nardi S., Berti A., Sartori L., Dalconi M. C., Morari F (2016). Disentangling the effects of conservation agriculture practices on the vertical distribution of soil organic carbon. Evidence of poor carbon sequestration in North- Eastern Italy. AGRICULTURE ECOSYSTEMS & ENVIRONMENT, vol. 230, p. 68-78, doi: 10.1016/j.agee.2016.05.035
5. Valentini L., Favero M., Dalconi M.C., Russo V., Ferrari G., Artioli G., (2016) Kinetic Model of Calcium-Silicate Hydrate Nucleation and Growth in the Presence of PCE Superplasticizers. CRYSTAL GROWTH & DESIGN, vol. 16, p. 646-654, doi: 10.1021/acs.cgd.5b01127
6. Gilberto Artioli, Luca Valentini, Marco Voltolini, Maria C. Dalconi, Giorgio Ferrari, Vincenzo Russo (2015). Direct Imaging of Nucleation Mechanisms by Synchrotron Diffraction Micro-Tomography: Superplasticizer-Induced Change of C–S–H Nucleation in Cement. CRYSTAL GROWTH & DESIGN, vol. 15, p. 20-23, ISSN: 1528-7483, doi: 10.1021/cg501466z
7. Luca Valentini, Maria Chiara Dalconi, Marco Favero, Gilberto Artioli, Giorgio Ferrari (2015). In-SituXRD Measurement and Quantitative Analysis of Hydrating Cement: Implications for Sulfate Incorporation in C-S-H. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, vol. 98, p. 1259-1264, ISSN: 0002-7820, doi: 10.1111/jace.13401
8. Gilberto Artioli, Luca Valentini, Maria Chiara Dalconi, Matteo Parisatto, Marco Voltolini, Vincenzo Russo, Giorgio Ferrari (2014). Imaging of nano-seeded nucleation in cement pastes by X-ray diffraction tomography. INTERNATIONAL JOURNAL OF MATERIALS RESEARCH, vol. 105, p. 628-631, ISSN: 1862-5282, doi: 10.3139/146.111049
9. Luca Valentini, Matteo Parisatto, Vincenzo Russo, Giorgio Ferrari, Jeffrey W. Bullard, Ross J. Angel, Maria C. Dalconi, Gilberto Artioli (2014). Simulation of the hydration kinetics and elastic moduli of cement mortars by microstructural modelling. CEMENT & CONCRETE COMPOSITES, vol. 52, p. 54-63, ISSN: 0958-9465, doi: 10.1016/j.cemconcomp.2014.05.005
10. Marco Voltolini, Maria Chiara Dalconi, Gilberto Artioli, Matteo Parisatto, Luca Valentini, Vincenzo Russo, Anne Bonnin, Remi Tucoulou (2013). Understanding cement hydration at the microscale: new opportunities from `pencil-beam' synchrotron X-ray diffraction tomography. JOURNAL OF APPLIED CRYSTALLOGRAPHY, vol. 46, p. 142-152, ISSN: 0021-8898, doi: 10.1107/S0021889812046985
11. Piovesan R., Dalconi M.C., Maritan L., Mazzoli C. (2013). X-ray powder diffraction diagram clustering and quantitative phase analysis on historic mortars. EUROPEAN JOURNAL OF MINERALOGY, vol. 25, p. 165-175, ISSN: 0935-1221, doi: 10.1127/0935-1221/2013/0025-2263

Research Area

The research activity is in the field of X-ray crystallography mainly by means of X-ray powder diffraction XRPD (with conventional and synchrotron radiation sources).
The starting activity began with the structural characterization of transition metal ion – exchanged zeolites using time-resolved XRPD and X-ray absorption (EXAFS) techniques. Other research topics covered the crystal chemistry of garnets, focusing on the local geometry, oxidation state and short-range ordering of minor and trace elements in natural garnets. Synchrotron X-ray micro-diffraction technique was applied to study the structural evolution of bioapatite in ossification regions of human bones.
Recent research activities has been focused on cementitious materials, in particular the kinetics of phase hydration in cement pastes. X-ray diffraction coupled with Rietveld analysis is the main technique used to quantify the development of crystalline and amorphous products. Complementary techniques (e. g. SEM, TG, isothermal calorimetry) are also used to obtain accurate phase quantification of complex system such as cement pastes. X-ray micro-tomography (X-μCT) combined with diffraction-tomography (XRD-CT) have also been employed to map non–destructively the spatial distribution of selected crystalline or amorphous phases in hydrating cement pastes.
Current research interest encompasses:
calcined clays as precursor for alkali activated low-carbon binders;
steel slags as secondary cementitious materials and its usability criteria.