2026

Journal of Building Engineering

Journal year: 2026 | Journal volume: vol. 119

scientific article

english

EN A vapor- and gas-permeable functionalized organosilicon compound exhibiting amphiphilic properties was used as a modifier for the cement composite. The following testing methods were used to characterize the admixture: magnetic nuclear resonance (1H NMR, 13C NMR, and 29Si NMR), Fourier transform infrared spectroscopy FT-IR, thermogravimetric analysis (TGA) with differential scanning calorimetry (DSC). In turn, the following tests were performed for cement composites: heat of hydration, setting time (initial and final), plasticity, compressive strength, resistance to cyclic freezing and thawing, resistance to algae, and porosity. The microstructure of the cement composites was determined using scanning electron microscopy (SEM) and terahertz radiation (T-ray). An experiment demonstrated that adding compound L43 to the mixture inhibited photosynthetic cell activity. This inhibition was found to depend strictly on the w/c ratio and the compound's concentration. Compound L43's high effectiveness was demonstrated at a lower w/c ratio and a concentration of 0.2 %. The maximum chlorophyll concentration (ChlFI) decreased by 77.5 % compared to the control group, and the average value decreased by 81.7 %. Additionally, the change in pore structure, characterized by an increased number of pores below 300 μm, enhanced the mortars' resistance to cyclic freezing and thawing. This change had no significant impact on the composite's physical and mechanical properties. The new T-ray technique used to evaluate the microstructure of the cement composite confirmed the relationships obtained between the L43 content, the water-to-cement ratio, pore distribution, and the biocidal properties of the designed cement composite.

24.12.2025

115066-1 - 115066-19

10.1016/j.jobe.2025.115066

https://www.sciencedirect.com/science/article/pii/S2352710225033030?via%3Dihub

Article Number: 115066

140