CONCRETE REINFORCING ADDITIVE BASED ON MODIFIED TECHNICAL PHOSPHOLIPIDS

This article presents the results of an experimental study on the effect of an organic additive based on modified technical phospholipids of lecithin on the physical and mechanical properties of cement stone produced using CEM I 42.5 cement. The investigation included compressive strength testing, strength gain dynamics, water absorption, and phase composition analysis using X-ray diffraction (XRD). It was found that at a dosage of 0.1%, the modified lecithin significantly increased compressive strength by 35% compared to the control sample. Strength development analysis showed that the modified samples reached values comparable to the control by day 7, with compressive strength exceeding 59 MPa by day 28. XRD results revealed increased intensity of peaks corresponding to hydrated phases such as ettringite and portlandite, indicating enhanced cement hydration. The study also emphasizes the environmental significance of the work: utilizing lecithin extraction by-products not only addresses waste management challenges in the oil and fat processing industry but also contributes to improving the performance of construction materials. The obtained results confirm the potential of using modified organic waste-based additives in the production of cementitious composites with enhanced performance characteristics.