Implementing silica aerogel particles in textile reinforced cement (TRC) composites: effect of using 2D vs. 3D textile reinforcement

In this study, the incorporation of super-insulating silica aerogel particles in textile reinforced cement (TRC) composites is investigated, to obtain a lightweight material that combines adequate mechanical properties and significant thermal conductivity. The inclusion of hydrophobic aerogel particles into a cementitious matrix – further referred to as ‘aerocement’ – inevitably leads to a drop in the mechanical performance, considering the lower density of the composite and the lack of bonding between cement and aerogel particles as major factors. This effect was quantified by three-point bending and compression tests on mortar prisms. The current study then focuses on the mechanical properties of aerocement reinforced with two- or three-dimensional basalt or glass textile. Each series was characterized by four-point bending tests in terms of mechanical properties and composite behavior. While the fiber type (basalt, glass) did not significantly affect the composites response, the transversal connections in the 3D textiles did improve the strength and crack formation more, compared to the 2D-reinforced aerocement composites.