Abstract Direct tension tests were conducted to investigate the effects of substrate moisture conditions and texture on ultra-high performance concrete (UHPC) overlay bond strengths. Improper surface preparation can result in inadequate strengths and, severe cases, lack bond. To demonstrate importance preparation, pull-off performed overlaid slabs that had two extreme (saturated dried) prior ap...

Particle packing optimization is a philosophy that has evolved over the years. Its use in concrete proportioning helped creating denser and stronger mixes. Numerous theories models have course of time to optimize concrete. Out which Modified Andreassen curve found its practical application optimizing high-performance The main objective study was different particle their effects on mortar mixes ...

The failure surface of elements can numerically represent by a concrete damage plasticity (CDP) model in Abaqus software which depends on five parameters. parameters are eccentricity, shape, biaxial to uniaxial compressive strength ratio, dilation angle, and viscosity. This paper studies the effect changing values bearing capacity, deflection, overall structural behavior ultra-high performance ...

Flexural testing on two prestressed segmental ultra–high–performance concrete channels and reinforced conventional deck composite girders (PSUC–RCCD) was carried out. One made up of four segments with dry joints, the other formed one channel beam without a joint. Both them poured slab site. The mechanical behaviors girders, including whole loading process, crack pattern, failure mode were inves...

Ultra-High-Performance Concrete (UHPC) is characterized by having an ultra-compact matrix resulting in ultra-high mechanical properties, low permeability to water and gases, improved ductility provided the addition of fibers. The production structures with this type concrete advantageous some situations, especially aggressive environments since it significantly increases durability. However, hi...

In ultra-high performance concrete (UHPC) embedded micro steel fibres increase the ductility and improve post cracking load-bearing behaviour under tensile loading. For an efficent economical dimensioning of components, especially for fatigue susceptible structures, it is necessary to characterise crack-bridging effect associated processes taking place in intersection between both material comp...