Detalle del registro

Long-term influence of chitin concentration on the resistance of cement pastes determined by atomic force microscopy

Universidad Autónoma de Nuevo León

 
Relación http://eprints.uanl.mx/11513/
http://doi.org/10.1002/pssa.201600105
10.1002/pssa.201600105
 
Título Long-term influence of chitin concentration on the resistance of cement pastes determined by atomic force microscopy
 
Autor Ortega, Eduardo
Rodríguez Martínez, Oliver
Figueroa Labastida, Miguel
Villa Pulido, Andrés Alberto
Sánchez Fernández, Antonio
Cué Sampedro, Rodrigo
Gracia Pinilla, Miguel Ángel
Menchaca, Jorge Luis
 
Tema QC Física
QD Química
TP Tecnología Química
 
Descripción The presence of sulfates potentialize damage on cementbased materials, leading to structural failures. Therefore, structures must be designed to compensate for this effect. The mechanical properties of cement–chitin mixtures are investigated with different percentages of chitin (0.5, 1.3, and 2.1 wt.%) and aging of composite in a joint nanoscopic- and macroscopic-scale by experimental study. The objective is to increase the durability of concrete elements at coastal aquifers where concrete structures are in constant exposure to sulfate ions, chloride ions among others. Tapping mode AFM was used to characterize the surface structure and roughness of the cement pastes. To verify the chitin addition and the formation of sulfate-based aggregates Raman and IR spectra were recorded and are presented in this work. Then, force spectroscopy was used to obtain the nanomechanical properties at three different
exposure times (1 day, 6 months, and 1 year) into water or a SO4 2 environment. Macroscopic parameters (e.g., compression strength of cylindrical probes) were assessed for comparison following standard guidelines. The results show a decrease of its mechanical properties as a function of the polymer concentration but more importantly, they correlate the elasticity and adhesion at the nanoscale with the behavior of the bulk material.
 
Publicador Wiley-VCH
 
Fecha 2016-07-26
 
Tipo Artículo
PeerReviewed
 
Formato text
 
Idioma en
 
Derechos cc_by_nc_nd
 
Enlace http://eprints.uanl.mx/11513/1/Ortega_et_al-2016-physica_status_solidi_%28a%29.pdf
Ortega, Eduardo y Rodríguez Martínez, Oliver y Figueroa Labastida, Miguel y Villa Pulido, Andrés Alberto y Sánchez Fernández, Antonio y Cué Sampedro, Rodrigo y Gracia Pinilla, Miguel Ángel y Menchaca, Jorge Luis (2016) Long-term influence of chitin concentration on the resistance of cement pastes determined by atomic force microscopy. Physica status solidi. (A). pp. 1-7. ISSN 1862-6300