Using Microsilica and Nano copper oxide to improve mechanical properties and permeability in concrete channels and pressurized water and sewage pipes

Movahedkhah, Salman; Dashti Naserabadi, Heydar; Jamshidi, Morteza

doi:10.22034/ijcoe.2026.571106.1215

Using Microsilica and Nano copper oxide to improve mechanical properties and permeability in concrete channels and pressurized water and sewage pipes

Articles in Press

Document Type : Original Research Article

Authors

Salman Movahedkhah

Heydar Dashti Naserabadi

Morteza Jamshidi

Department of Civil Engineering, Cha. C. Islamic Azad University, Chalus, Iran.

10.22034/ijcoe.2026.571106.1215

Abstract

Since corrosion of longitudinal and transverse rebars in concrete sewage pipes is a major. In this research, experiments were conducted by changing different percentages of nano copper oxide and microsilica in the original concrete plan. Therefore, in 14 different plans, compressive strength, and permeability were performed on 15 x 15 cm cubic samples at ages 7, 28, and 42, and then compressive strength tests were performed using the BS method. In the case of nano copper oxide up to 3%, we see an improvement in strength, but after that the strength results of the samples decrease. It was also found that the strength of samples containing 7% microsilica at the age of 42 days with a grade of 300 kg/m^3 has better strength than other grades tested, and increasing cement and increasing the age of concrete significantly improves the permeability of concrete. According to the results, increasing the cement content of concrete caused an acceptable level of permeability, so 7% microsilica with a cement content of 350 kg/〖cm〗^3 had the best performance. According to the results of nano copper oxide and microsilica, microsilica was able to perform better than nano copper oxide in improving the permeability characteristics at a cement content of 350 kg/〖cm〗^3, at an amount of 7% of the weight of cement at the age of 42 days. Nano copper oxide and microsilica can reduce cement consumption in concrete while maintaining the required strength and permeability characteristics.

Keywords

Nanotechnology

Microsilica

nano copper oxide

compressive strength

permeability

Subjects