Abstract
The use of construction waste in creating concrete and mortar is an important process that not only offers economic benefits but also helps protect the environment by reducing waste in rural and urban areas. This experimental study aims to investigate the effect of adding crushed ceramic waste (CCW) and crushed brick waste (CBW) on bulk density, workability, compressive and flexural strength, water absorption, and microstructure properties. To determine changes in porosity, the study uses mercury intrusion porosimetry (MIP) technique to measure porosity and pore size distribution. SEM and EDX analyses are conducted to examine the microstructure and size of the void using an electron microscope, and photos of voids in the mortar matrix are taken. By replacing 15% of the sand with CCW and CBW, the compactness and mechanical strength of the dune sand mortar are enhanced, increasing the dynamic modulus of elasticity by around 29% and 26%, respectively. This is due to the pozzolanic activity of these residues, which mainly occur in the form of medium and small capillaries in all the mortars studied, reducing the diameter of the pores.
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