Impact of Tufa Stone Powder as a Partial Replacement of Aggregate on the Mechanical Performance and Durability of Repair Mortar

The rehabilitation and reconstruction works are usually performed with a view to conserving these landmarks maintaining them culturally, architecturally structurally. From this perspective, the mortars utilized in repairs must be suitable, physiochemically mechanically, ancient materials used buildings. Accordingly, it was proposed evaluate tufa stone powder, waste product of one most widely found stones Loire Valley France, as an ingredient repair-work mortar mixtures (M1, M2) through partially replacing fine aggregate contains different amounts powder (37%, 42%) by weight mix. Additionally, third manufacturing (M3) both prepared for comparison stone. mechanical properties (including flexural, compressive shear strengths, ultrasonic pulse velocity) durability (total porosity, thermal dilation conductivity, capillary absorption, water gas permeability) three were examined addition those results revealed that mortar, M2, (having lower binder content higher amount substitution powder) has lowest performance other mortars, indicating is more supple loose than authentic masonry. comparable existent monuments. Consequently, (M2) appropriate utilization repairing old France.