Experimental study of strength and durability properties of fly ash-lime-quarry dust (FALGQ) bricks

The paper deals with the results of an experimental investigation related to the properties of fly ashlime-gypsum-quarry dust (FALGQ) bricks and their masonry. The strength, absorbing capacity, and efflorescence of FALGQ were examined. In addition, concrete's strength, the cement mortar and fly ash brickwork's stressstrain properties, and the flexure's resistance to cracking were also studied. The results show that: (1) FALGQ can be produced with a greater density using a fly ash-sand combination than with fly ash alone; (2) it is feasible to achieve 12 to 14 MPa strength development in a wet condition, a relatively low value of absorption of water, strong dimensional stability and strength properties for FALGQ using 35% lime, 10% quarry dust, and 30% gypsum; and (3) high rupture elasticity and deformation significantly impact in fly ash brick masonry. This study also contrasts the durability of bricks with that of burned clay bricks, specifically examining weight reduction and the decrease in strength qualities resulting from an acid test.