| فنی،مدیریتی،حقوقی| اعتبار،چابکی،پاسخگویی|
نوع مقاله : مقاله پژوهشی
نویسندگان
گروه عمران، دانشگاه آزاد اسلامی، واحد شبستر، شبستر
کلیدواژهها
عنوان مقاله English
نویسندگان English
Many of the key behaviors of concrete at the nanoscale are influenced by its internal microstructure. Adopting a nanotechnology-based approach can thus play a crucial role in identifying, analyzing, and improving the microstructural performance of concrete as a nanomaterial. In this research, the effect of metal oxide nanoparticles on the compressive strength and permeability of ordinary concrete was investigated. A total of 36 cubic specimens were prepared to evaluate compressive strength, and 4 cylindrical specimens were produced to measure permeability. The cubic specimens had dimensions of 5 × 5 × 5 cm, and the cylindrical specimens were 15 × 15 cm. Tests were conducted at curing ages of 7 and 28 days. Compressive strength tests were performed with three cement contents—350, 400, and 450 kg/m³—at varying percentages of titanium dioxide (TiO₂) nanoparticles (0%, 1%, 3%, and 5%). The permeability test was conducted only on samples with 400 kg/m³ cement content, using the same nanoparticle replacement ratios (0%, 1%, 3%, and 5%). The results showed that for concretes with cement contents of 350 and 400 kg/m³, the highest compressive strength was achieved with 5% nanoparticle content at both ages. In contrast, for the 450 kg/m³ mix, the optimum nanoparticle dosage was 3%.
Furthermore, the permeability test results indicated that the addition of nanoparticles reduced concrete permeability, reaching the minimum permeability at the 3% nanoparticle content.
کلیدواژهها English
