ANOVA-guided assessment of waste glass and limestone powder influence on ultra-high-performance concrete properties

A Comprehensive Overview of Recycled Glass as Mineral Admixture for Circular UHPC Solutions

“…Further examination reveals the most notable discrepancy between the control dosage and optimized dosages at 7 days of age, with diminishing disparities as curing time progresses. This suggests a gradual convergence in performance as the curing duration extends [58,82]. In accordance with the Brithishstandard [143], concrete exhibiting absorption rates under 0.25 mL/m 2 s for ISAT-10 and 0.17 mL/m 2 s for ISAT-30 is defined as low-absorption concrete.…”

“…The data reveal consistently low absorption levels across all samples, with a gradual decline as curing progresses. Notably, there is a marked reduction in absorption values over time for the Control dosage, suggesting potential densification of the structure, likely attributed to pore filling [58,82]. The findings from density, absorption…”

“…Further examination reveals the most notable discrepancy between the control dosage and optimized dosages at 7 days of age, with diminishing disparities as curing time progresses. This suggests a gradual convergence in performance as the curing duration extends [58,82].…”

“…For its part, Table 4 presents some physical properties of recycled glass particles utilized in UHPC mixtures [24,42,59,64,75]. Moreover, Figure 3 puts forward the SEM (Scanning Electron Microscopy) analysis of the particles of recycled waste glass utilized in several UHPC formulations [29,47,82,83]. As can be observed in Figure 3, these particles are characterized by their irregular shapes and angular edges, resulting from the mechanical grinding action applied during production.…”

“…Therefore, substituting typical UHPC-making ingredients, such as QP, SF, cement and even quartz sand, with ground waste glass has the potential to substantially reduce the expenses associated with traditional UHPC formulations [76,77]. In addition, due to the chemical features depicted in Table 3, the low water absorption (see Table 4) and the lack of porosity of milled waste glass particles, the utilization of GP and GS allows for reducing the necessary amount of HRWR [47,59,82], which has a significant positive impact on the final cost of UHPC [12]. Moreover, the utilization of locally available WG for UHPC manufacturing has the added advantage of reducing material transportation expenses [41].…”