Accelerated Corrosion Test in Mortars of Plastic Consistency with Replacement of Rice Husk Ash and Nano-SiO2

作者：Pellegrini Cervantes M J; Barrios Durstewitz C P; Nunez Jaquez R E; Almeraya Calderon F; Rodriguez M Rodriguez; Fajardo San Miguel G; Martinez Villafane A

来源：International Journal of Electrochemical Science, 2015, 10(10): 8630-8643.

• superficial absorption
• nanometric mortar
• accelerated corrosion
• nanoparticles

Cement replacement by ash in mortars has ecological and microstructural advantages. Meanwhile, nanoparticles (NP) replacements improve the performance of properties at nanometer scale. Researchers have incorporated in mortars nano Silica Oxide (nSO) and rice husk ash (RHA) through studies of physical and mechanical properties. However, the study of the synergy of their simultaneous use is scarse mainly regarding the resistance to corrosion. This paper evaluated the performance of properties of plastic consistency mortars with replacement of ordinary Portland Cement (OPC) by 20% RHA and 1.0% nSO, by assaying porosity, compressive strength and resistance to corrosion by impressed voltage. The simultaneous replacement of RHA+nSO resulted in higher performance, with decreases in superficial absorption up to 60.0%, decreases in porosity up to 3.9% and increased compressive strength and corrosion of 7.1% and 37.6%, respectively. Simultaneous use of RHA+nSO of plastic consistency mortars presents advantages in the improvement of electrochemical, physical and mechanical properties, due to the synergistic effect of the combination of ash and nanoparticles.

• 出版日期2015-10