Investigating Fracture (I/II) Characteristics in RAP-inclusive GGBS based Geopolymer Concrete through Laboratory Testing and Statistical Analysis

The widespread use of cement concrete, characterized by energy-intensive processes and substantial carbondioxide emissions, necessitates a transition towards sustainable construction materials. In response to theenvironmental challenges posed by traditional cement concrete, this study explores the potential ofgeopolymer concrete as an eco-friendly alternative. The research investigates the fracture characteristics ofGGBS-based geopolymer concrete incorporating Reclaimed Asphalt Pavement (RAP) throughcomprehensive laboratory testing and statistical analysis. The study focuses on the impact of varying RAPcontent (0%, 15%, and 30%) on fracture properties in both Mode I and Mode II, utilizing semi-circularbend (SCB) specimens for fracture tests. Statistical analyses, including Analysis of Variance (ANOVA),Scheffe statistical test, and Weibull fracture failure probability modelling, are employed to interpret theresults obtained from 108 SCB test specimens. The findings consistently demonstrate a reduction in meanfracture toughness with increasing RAP content. While Mode I ANOVA results exhibit a statisticallysignificant difference, Mode II Scheffe statistical test results indicate no significant disparity. Weibullanalysis underscores an escalation in the probability of failure with higher RAP percentages, highlightingthe substantial influence of RAP content on the fracture behaviour of geopolymer concrete. These insightscontribute significantly to the comprehension of sustainable construction materials and offer valuableguidance for potential applications in real-world scenarios, particularly in the design of pavements andstructures.

Investigating Fracture (I/II) Characteristics in RAP-inclusive GGBS based Geopolymer Concrete through Laboratory Testing and Statistical Analysis Keywords:

Fracture , GGBS , Geopolymer , Concrete , RAP