Investigating the state of dynamic toughness of UHPCC type concrete based on mechanical properties: a review study

Concrete stands as a cornerstone in civil engineering infrastructure, offering resilience against dynamic loads. However, due to its inherent mechanical and behavioral traits, concrete often suffers post-construction and operational damages in the form of cracks. In areas marred by cracks, the traditional criteria of strength and allowable stress falter in interpreting stress concentrations near the crack tips. This predicament spurred the evolution of failure mechanics theory. In fracture mechanics, the conventional stress-strength comparison cedes ground to the assessment of stress intensity factor vis-à-vis toughness. Toughness, distinct from other mechanical attributes, is not merely an intrinsic quality but hinges on numerous geometric and physical variables. Its evaluation necessitates laboratorial analysis of samples. Amid these considerations, the compressive strength of concrete assumes significance-it is a universal trait known across all concrete structures and conveniently ascertainable post-construction via core tests. Of notable importance are ultra-high performance cement composites (UHPCC), an exceptional variant of concrete representing advanced materials. UHPCC has emerged as a beacon of promise for structural integrity within civil and military spheres. Its enduring popularity stems from heightened durability and strength relative to conventional concrete when subjected to dynamic loads. As such, a profound grasp of existing blast- and shock-resistant structures founded upon this material and their dynamic responses under such forces assumes critical importance. This article thoroughly explores the dynamic toughness intrinsic to UHPCC concrete. It delves into the mechanical properties, encompassing diverse fiber compositions and a spectrum of impact test methodologies. By conducting an exhaustive survey of previous scholarship in this domain, the paper highlights the available insights and contemplates the associated challenges.