One of the loftiest goals of this research is environmental preservation. Scientists are looking at ways to use recycled rubber tires and woven polyethylene terephthalate fiber (PET-F) from used water bottles as partial replacements for natural aggregates and macro-polypropylene fiber (Pp-F) in concrete production. In this research, rubber bits are used as 40% of coarse aggregate. So, both fibers were added to the tested mixtures at ratios of 0.5%, 1%, and 1.5% of the concrete volume. Adding 0.5% aluminum powder (Al-P) to 1.5% fiber-reinforced mixes was also studied. In this study, the initial and final setting times, fresh and dry densities, mechanical properties, thermal conductivity and diffusivity, microstructure, and the loss of density and compressive strength due to exposure to electrochemically lightened concrete made with magnesium chloride are all evaluated. Mechanical tests of compressive (f_c), indirect tension (f_t), flexural strength (f_f), toughness (T), and ductility index (DI) were carried out on the tested samples. PET-F outperformed Pp-F at all studied percentages and can be successfully incorporated into rubber concrete up to 1.5%. PET-F has significant and exciting potential due to its thermal-insulating properties. 1.5% PET-F addition reduced thermal conductivity (K) and diffusivity (α) by 21.2% and 47.3%, respectively. 1.5% PET-F addition reduced the dry density from 1800 to 1705 kg/m³ and improved the control mix's mechanical properties and electrochemical resistance (M_O). Its addition improved f_c by 46% and 53% for at 28-, and 56-days age. Adding 0.5% Al-P to 1.5% PET-F mix reduced the density to 1620 kg/m³ and the thermal properties k and α to 28.5% and 55.5%, respectively. But its addition had a bad effect on the other tested properties.