Formulation of a repair mortar based on dune sand and natural microfibers

摘要

This paper presents an experimental study on the development of a repair mortar based on dune sand and natural microfibers. This study permits the formulation of a simple mortar constituted of cement and dune sand and also to investigate the effect of natural microfibers added to mortars on their properties such as density, mechanical strength, shrinkage, modulus of elasticity and bonding strength. The Alfa natural microfibers (Stipa tenacissima L) used with different volume ratios were 3 to 5 mm long. The results obtained showed an enhancement in the mechanical and physical properties of mortars with natural microfibers compared to those of mortars based on the dune sand (without Alfa natural microfibers) tested in the same conditions, particularly, compressive strength, shrinkage and bonding strength.