This study set out to derive the optimal conditions for ensuring the monolithicity of ultra-high-performance concrete (UHPC). Direct shear tests were performed to examine the influence on the bonding shear performance. The experimental variables included tamping and delay, which were set to 0, 15, 30, and 60 min. SEM and XRD analyses of the microstructure and composition were performed. The dir...

For optimum production of ultra-high performance concrete (UHPC), the material and microstructural properties of UHPC cured under various heat treatment (HT) conditions are studied. The effects of HT temperature and duration on the hydration reaction, microstructure, and mechanical properties of UHPC are investigated. Increasing HT temperature accelerates both cement hydration and pozzolanic re...

This paper addresses the development of an eco-friendly Ultra-High Performance Concrete (UHPC) with efficient cement and mineral admixtures uses are investigated. The modified Andreasen & Andersen particle packing model is utilized to achieve a densely compacted cementitious matrix. Fly ash (FA), ground granulated blast-furnace slag (GGBS) and limestone powder (LP) are used to replace cement, a...

The history of the development Ultra-High Performance Concrete (UHPC) shear walls and current status today’s research as well future prospects are comprehensively collated. analysis process conclusive results present-day domestic international on UHPC highlighted. load displacement curves, hysteresis curves skeleton lines ultra-high performance concrete under different experimental loads collat...

In this study, the setting and tensile strength development of ultra-high-performance concrete (UHPC) at a very early age was investigated by performing the penetration resistance test (ASTM C403), as well as the direct tensile test using the newly developed test apparatus, and taking ultrasonic pulse velocity (UPV) measurements. In order to determine the optimum surface treatment method for pr...

Ultra-High Performance Concrete (UHPC) improves the bearing capacity as well durability of structural concrete. This study aims to investigate constituents UHPC in both phases: aggregate and cementitious materials. The proper ratio mixture was chosen based on combining an gradation quartz sand crushed stone. In addition, compressive strength hardened cement paste investigated achieve optimal si...

In this study, filler and silica fume were substituted by Liquid crystal display glass powder (LCDGP) nanosilica, respectively, to improve the performance of ultra-high- fiber-reinforced concrete. addition, surface steel fiber was modified with ethylenediaminetetraacetic acid (EDTA) solution interfacial friction between Ultra-high-performanceconcrete (UHPC) matrix. Both LCDGP nanosilica reacted...

Abstract In many countries, the bridge infrastructure suffers from damaged bridges that need to be rehabilitated or replaced. This means state institutions responsible for this must make extensive investments. Are there other ways address problems caused by damaging effects of de-icing agents, fatigue due high vehicle loads and frequencies on load side lack strength of, example, orthotropic dec...