Behavior Analysis of One-Component Waterproofing Mortars by Mechanical and NMR Investigations

Waterproofing mortars are used for many applications in the field of construction. The behavior of waterproofing mortars, after application on surface, is different due to the use of aggregates and polymers from different sources, even if it satisfies the waterproofing needs of the substrate and meets quality standards. Measurements performed at 3,7 and 28 days by mechanical tests combined with Nuclear Magnetic Resonance (NMR) relaxometry highlight the physical and mechanical properties of the mortar in relation to the presence of hydration water and water in small, medium and large pores. During the 28 days of hydration, the size and homogeneity of the pores change radically so that the mortar becomes more resistant to compression and flexural tensile.