@article{A. Naser Al-Timimi_N. Al-Shroofy_A. Jan_B. Al-Zubaidi_2022, title={SELF-HEALING OF MORTAR CRACKS: THE ROLE OF HUMAN PATHOLOGICAL BACTERIA}, volume={22}, url={https://iqjfmme.com/index.php/jmme/article/view/583}, DOI={10.32852/iqjfmme.v22i1.583}, abstractNote={<p>The characteristics of self-healing related to N-type cement mortars, the addition of human <br>pathological bacteria to enhance mortar durability, and compressive strength thus reducing <br>maintenance cost and manpower after crack initiation. Bacteria have been examined by using <br>two types of biological agents: Proteus mirabilis and E. Coli bacteria. Mortars are formed <br>from a combination of Portland cement and ordinary sand, treated by Proteus mirabilis and E. <br>Coli bacteria with different concentrations. The mechanical properties of the treated mortars <br>are measured and the mortars were characterized by means of Fourier-transform infrared <br>spectroscopy (FTIR), scanning electron microscopy (SEM), and electron energy dispersive <br>spectroscopy (EDX). This study shows that Proteus mirabilis and E. Coli assist the formation <br>of calcium carbonate inside the mortar micro-pores leading to enhancement of the <br>compressive strength and hardness of the mortar specimen. This emphasizes the possibility of <br>activating the self-healing characteristic of the cement mortar and its utilization for cracks <br>treatment and repair</p>}, number={1}, journal={THE IRAQI JOURNAL FOR MECHANICAL AND MATERIALS ENGINEERING}, author={A. Naser Al-Timimi, Lina and N. Al-Shroofy, Mohanad and A. Jan, Aynoor and B. Al-Zubaidi, Aseel}, year={2022}, month={Apr.}, pages={29–41} }