Comparative Analysis of Cement-Sand and Cement-Sand-Khaka (Stone Dust) Mortar Shear Wall Brick Masonry Materials

Author:

A.H. ALSUWWI (1), M. HASSAN (1), J. AWWAD (1) and N. AHMAD (2)*

A.H. ALSUWWI (1), M. HASSAN (1), J. AWWAD (1) and N. AHMAD (2)*

(1) Senior UG Students, Department of Civil Engineering, UET Peshawar, Peshawar, 25120 KP, Pakistan

(2) Professor (Asst.), Earthquake Engineering Center, UET Peshawar, Peshawar, 25120 KP, Pakistan

*E-Mail: naveed.ahmad@uetpeshawar.edu.pk

Abstract:

This research study experimentally evaluates the performance of two typologies of shear wall brick masonry materials that use either 1:6 cement-sand (CS) mortar or 1:4:4 cement-sand-khaka (CSK) mortar. Khaka (stone dust) is produced in the stone crushing process in KP, Pakistan and Harbin, China and is included in this investigation to enable the comparison of the basic mechanical properties of the materials and in-plane shear strength-deformation of walls. The basic mechanical properties of CSK when compared to CS mortar masonry showed an increase in the compressive strength of mortar (Pak-Khaka +72%, China-Khaka +40%); a reduction in compressive strength of masonry (Pak-Khaka -36%, China-Khaka -40%); an increase in masonry bond tension strength (Pak-Khaka +142%); and an increase/minor-decrease in masonry bond shear strength (China-Khaka +268%, Pak-Khaka -8.50%). The in-plane shear strength-deformation of CSK with respect to CS mortar masonry showed an increase in lateral in-plane shear strength (China-Khaka +103.30%); and a minor-decrease in maximum lateral deformation (China?Khaka -8.70%). The research showed that overall the addition of Khaka in mortar improves the resistance of brick masonry walls against in-plane lateral loads.
Key words: masonry characterization, masonry shear walls, masonry in diagonal tension, in-plane shear, Khaka