| Nano concrete |
| Paper ID : 1085-ISCH |
| Authors |
|
Kareem Sherif Yehia * Applied Chemistry Student at the faculty of science helwan university |
| Abstract |
| This investigation presents the influence of various types of nanoparticles on the performance of ultra-high-performance concrete (UHPC).Researchers have concluded that the incorporation of nano waste materials can enhance the compressive strength and durability of concrete.The concrete industry faces sustainability challenges due to the limited availability of natural resources, Continued consumption at current levels may render concrete an unsustainable material. Incorporating waste materials into concrete can improve resource efficiency, reduce production costs, and promote eco friendly practices, thereby supporting the development of green concrete. We specifically targeted nano waste glass due to its high reactive silica content,exceeding 70% ,which makes it particularly effective for concrete applications. Nano waste glass was prepared through a two-stage process: first crushing, followed by milling until the material reached the nanoscale (50nm). Several UHPC mixes incorporating different dosages of nanoparticles, up to 3% were prepared and tested. The mechanical properties,durability and microstructure of the UHPC mixes were evaluated to study the influence of nanoparticles on the hardened characteristics of UHPC. The experimental results indicated that early strength increased with the incorporation of nanomaterials compared to the reference UHPC mix. Specifically,replacing 1% of cement with nano waste glass achieved optimal compressive strength, increasing to 134 MPa at 28 days and 140 MPa at 90 days.Characterization of the waste glass using Scanning Electron Microscopy (SEM),X-Ray Diffraction (XRD) and X-Ray Fluorescence (XRF) confirmed the role of nanomaterials in densifying the microstructure, reducing calcium hydroxide content, and producing more C-S-H, which collectively improve strength and reduce water absorption in UHPC. |
| Keywords |
| ultra-high-performance concrete; sustainability of concrete nano waste glass ; preparation of nano waste glass; nano waste glass characterization; mechanical properties of UHPC; sustainability of concrete. |
| Status: Abstract Accepted (Poster Presentation) |