INSTITUTO DE TECNOLOGIA EN POLIMEROS Y NANOTECNOLOGIA
Unidad Ejecutora - UE
Self-healing in mortars: rules of selection of healing agents
MARIANO ESCOBAR; SEBASTIAN VAGO; ANALIA VAZQUEZ
COMPOSITES PART B-ENGINEERING
ELSEVIER SCI LTD
Lugar: Amsterdam; Año: 2013 vol. 55 p. 203 - 213
In the present work key parameters of different epoxy systems (such as viscosity and gel time) were eval- uated to be used as healing agents when were included in a cement matrix. Epoxy systems were encap- sulated in hollow glass tubes and were introduced in a mortar matrix. Samples were preloaded under three point bending in order to create a crack and release the healing system. After that, they were loaded to measure the residual strength and estimate the healing efﬁciency. The inﬂuence of temperature and the volume of the glass tubes were examined. Regarding the healing efﬁciency, a higher temperature led to an improvement of autogenous healing of the mortar matrix and a higher degree of crosslinking of the healing agent. For the studied systems, the use of glass tubes with smaller diameter containing the healing system seemed to be better in order to maintain the mechanical properties of the mortar- based composite.