Research on the performance of modified shell ash mortar used for strengthening of historical masonry buildings

Abstract

On the basis of previous research on the preparation of modified shell ash mortar, which can be used in the strengthening of historical masonry buildings, this paper carried out a further experimental study on the performance of this mortar. Workability, mechanical performances, volume stability and water resistance are the main aspects of the research focus. The test results show that compared with pure shell ash mortar, the compressive strength, flexural strength, tensile bond strength, volume stability and water resistance of the modified shell ash mortar are significantly improved. The pozzolanic activity effect and microaggregate filling effect of the two added modified materials act synergistically in the hydration and structural formation of shell ash mortar, which is the main reason for its improved performance following modification. The research results provide a basis for the application of modified shell ash mortar in the strengthening of historical masonry buildings.

Keywords

• Modified shell ash mortar
• Workability
• Mechanical performances
• Volume stability
• Water resistance
• Historical masonry buildings