Ultra-high-performance concrete (UHPC) is a kind of high-tech cementitious material with superb mechanical and durability properties compared to other types concrete. However, due the high content cement silica fume used, cost environmental impact UHPC considerably higher than conventional For this reason, several efforts around world have been made develop greener less expensive local pozzolan...

Ultra-high performance concrete (UHPC) has a high self-healing capacity and is prone to bursting after exposure temperatures due its characteristics. This work evaluates the damage improvement of UHPC with coarse aggregates through mechanical properties (compressive strength ultrasonic pulse velocity), transport (water absorption chloride diffusion test), micro-properties such as X-ray diffract...

This paper presents an experimental investigation on the flexural behavior of ultra-high-performance concrete (UHPC) beams prestressed with external carbon fiber-reinforced polymer (CFRP) tendons. A total eight T-shaped beam specimens were fabricated and tested, effects effective prestressing stress, partial ratio, deviated angle, loading condition analyzed. The results indicate that fully expe...

Concrete T-beams are commonly used in building slab systems and bridge decks. They may require strengthening shear when they deteriorated or loading requirements increased. This research project studied the behaviour of concrete using cast-in-place Ultra High-Performance (UHPC) layers as a lateral method avoiding beam depth modification. Three UHPC strengthened beams together with one reference...

This study studies the torsional capacity of rectangular ultra-high-performance-concrete (UHPC) beams. Nine UHPC beams were tested under pure torsion load. The failure modes presented and influences parameters, including reinforcement ratio, stirrup ratio steel fiber content discussed. experimental results showed that longitudinal had little effect on crack width plastic stiffness in serviceabi...

Concrete structures in marine environments are prone to deterioration and damage due chloride ion penetration, freezing thawing, chemical erosion. Ultra-high-performance concrete (UHPC) mixed with steel fibers has been proposed as a solution enhance the durability mechanical properties of environments. Although several studies have conducted this regard, they yet focus on addressing errors that...

Recycled brick powder (RBP) is a kind of solid waste material with pozzolanic activity, which can partially replace cement as cementitious to prepare concrete. In this paper, ultra-high-performance concrete (UHPC) was prepared by RBP. The effects different RBP contents mineral admixture on the mechanical properties and microstructure UHPC were studied experiments. results show that has certain ...

This paper aims to study the influence of key design parameters (e.g., reinforcement ratio, cover thickness, stud spacing, and thickness ultra-high-performance concrete (UHPC) layer) on longitudinal transverse bending performance, as well cracking load ultimate bearing capacity calculation theory steel–UHPC lightweight composite deck (LWCD) structure. Four tests four plates beams were conducted...

Abstract Calcined diatomaceous earth (CDE) with a maximum grain size of 143 ?m was used to partially replace 5 and 10% cement in ultra-high-performance concrete (UHPC) mixtures. The other materials producing the include Ordinary Portland Cement, iron ore powder, river sand sizes 112.5, 231, 766.2 ?m, respectively. Moreover, UHPC specimens designed water–cement ratio 0.2 superplasticizer 1.5% fr...

This study assesses the ballistic impact strength of thin plates made ultra-high-performance concrete (UHPC) with low cement content (250 kg/m3) and volumes 80% steel 20% polypropylene (PP) hybrid fibers. The were prepared thicknesses 30, 50, 70 mm fiber volume ratios 1.5% 3.0%. Compressive strength, flexural tensile residual determined using experimental methods. Test results showed that regar...