INTEC   05402
INSTITUTO DE DESARROLLO TECNOLOGICO PARA LA INDUSTRIA QUIMICA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Mechanical properties of organic-ceramic composites hierarchically structured
Autor/es:
IGNACIO RINTOUL; ANALIA QUIROGA
Lugar:
Santa Fe
Reunión:
Congreso; 14° SAM-CONAMET XIII IBEROMAT XIII Simposio MATERIA; 2014
Institución organizadora:
Asociación Argentina de Materiales (SAM) y la Universidad Nacional del Litoral
Resumen:
P { margin-bottom: 0.21cm; } Climatic and tectonic catastrophes such as the Katrina hurricane in 2005, the tsunamis in Southeast Asia in 2004 and 2006 and more recently the earthquakes in Haiti and Chile in 2010, have pushed the improvement and development of building materials for cheap, rapid and safe construction. Wool wood cement composites (WWCC) are widely used materials constituted of wool wood (WW) and Portland cement (PC). The material presents excellent mechanical, chemical and biological properties. However, the understanding of its mechanical behavior is rather limited. Such knowledge could contribute to improve and design their properties. In general, the prediction of the properties of a composite knowing the properties of their constituents is a real challenge. The situation is particularly complex in cases such as composites which present different structural levels. Here, we propose the WWCC to be a hierarchically structured as 3D sponge, 2D laminated and particulated+fibrous in the cm, mm and micron scales, respectively. We present a deduction and experimental validation of a set of expressions describing the stress-strain plot of such type materials. Elastic modulus of the WW and PC and their relative mass ratios, the apparent density of the material and geometry of the WW are the necessary input data. Mechanistically, the model predicts failure by buckling at the mesoscale combined with bending + interphase detaching at the microscale. Porosity and orientation degree are also considered in the model.