The Role of Nanoparticles on the Durability of Lime-Pozzolan Binding System

Abstract

The present research study is an effort to evaluate the effect of different nanoparticles in lime-pozzolan system, in time. nanosilica, nanoalumina and nanocalcium oxide were used in different combinations in this traditional binding system. The paper aims to record the durability of the traditional binding system in time, up to 365 days. For that purpose, the samples were subjected to ageing tests, such as wetting-drying cycles, sea water cycles and salt cycles. Up to 90 days, nanosilica benefits the most of the physic-mechanical properties, as well as the microstructure. Though, by studying the systems in time, the behavior of the other nanoparticles seems to favor certain properties more than nanosilica, especially at later ages. The addition of nanocalcium oxide combined with nanoalumina aids the improvement of the microstructure and the system presented great compressive after 40 cycles in ageing tests.