Properties of Innovative Hybrid Epoxy–Cement Binder Composite with Carbon Quantum Dots for Prestressed Ultra‐High‐Strength Concrete Shear Wall Structures

Résumé fourni par la source

This chapter delves into hybrid epoxy–cement binders that integrate carbon quantum dots (CQDs), which are essential for comprehending the shear wall feature of the prestressed ultra-high-strength composites and its appropriate applications. Nevertheless, the methodology lacks sufficient detail when it comes to epoxy–cement composites. This chapter investigates the relevant mechanisms and clarifies the phenomena observed. The proposed mechanisms related to the physical, mechanical, and durability performance of the hybrid epoxy–cement binder with CQD are based on experimental outcomes, supported by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) analyses. The conclusions drawn are as follows: the SEM analysis indicated that the addition of CQD significantly reduced the apparent porosity and water absorption of the innovative hybrid epoxy–cement binder composite compared to the traditional composite, the incorporation of CQD in various proportions within the innovative hybrid epoxy–cement binder composite substantially improved its physical and mechanical properties, and the increase in CQD content notably elevated the strength performance of the innovative hybrid epoxy–cement binder composite during mechanical testing, with an optimal CQD concentration determined to be 2.5%. Therefore, the CQD has the ability to develop the physical and mechanical properties of the shear wall of the prestressed ultra-high-strength composite, which was made of hybrid epoxy–cement binder.