The purpose of the work reported in this paper is to assess performance recycled ultra-high durability concrete (R-UHDC), produced using different fractions aggregate obtained from crushed (UHDC), as a substitute for natural aggregate. Four (R-UHDC) mixes were designed and manufactured with reference mix based on three replaced UHDC according two percentage replacement values (50 100%). effect ...

Abstract The present study investigates the shear behavior of Ultra High Performance Concrete girder strengthened by steel bars and stirrups simulation approach. Utilizing Damage Plasticity model that involves strength reduction nonlinear material, 3D models are established analyzed commercial software Abaqus. numerical is verified comparing test data to ensure reliability. Numerical were then ...

Considering the ambitious greenhouse gas emission reduction and efficient use of resource targets set by Sustainable Development Goals importance concrete structures to achieve these goals, there is an increasing need study environmental performance different production alternatives. Cement one main building materials that contribute significantly global warming; therefore, studying innovative ...

Size effect of heterogeneous granular materials under tensile loading is a well known phenomenon and the subsequent size laws are widely available in scientific literature. On contrary, compression scarcely studied, which, especially for concrete, more significant its brittle failure mode practical applications. This paper investigates deterministic concretes including normal strength concrete ...

In order to improve flexural and impact performance, thin panels of steel fiber-reinforced ultra-high performance concrete (UHPC) were further reinforced with external layers continuous thermoplastic (CFRTP) composites. CFRTP sheets bonded 305 × 12 mm UHPC using two different techniques. First, unidirectional E-glass tapes polyethylene terephthalate glycol-modified (PETG) arranged in fused the ...

Abstract Several studies show that thermal and hydrothermal treatment can further improve the excellent properties of UHPC in terms mechanical strength durability. While for increase is attributed to an intensified pozzolanic hydraulic reaction, previous accredited it mostly formation tobermorite. In presented study samples was systematically varied phase analysed related development a referenc...

This paper proposed a new method of exposing fibers using expandable polyethylene (EPE) foam to improve the interface performance. The flexural tensile behavior between precast steam-cured and cast-in-place non-steam-cured ultra-high performance concrete (UHPC) members was examined under four-point bending. improvement effects four non-destructive treatments—e.g., coating with epoxy glue cement...

The need for concrete with ‘super’ strength and ductility greater sustainability has been answered by the existence of ultra-high-performance (UHPC) fiber-reinforced (UHPFRC). Over last decades, UHPFRC implemented in actual structures, as well used to retrofit structural elements, including columns. However, use UHPC confinement strengthen normal columns is still limited. Therefore, this resear...

In this paper, a bending test of precast ultra-high-performance concrete (UHPC) diaphragm slab was carried out. The revealed that the flexural failure process specimens under action positive moment can be divided into three stages: elastic, crack-propagation, and yield stages. first stiffness reduction structure caused by cracks at bottom slab, while second drop resulted from yielding longitudi...