recent tendencies in concrete technology have been towards to high- performance concrete with a low water-cement ratio. however, high performance concretes have some problems. one of the problems is early-age cracking due to autogenous shrinkage. this study presents the results of an experimental investigation carried out to evaluate the autogenous shrinkage of high-strength concrete. accordin...

High autogenous shrinkage property is one of the disadvantages ultra-high-performance concrete (UHPC), which may induce early age cracking and threaten safety structure. In present study, different dosages calcium sulfoaluminate (CSA) cement were added in UHPC as an effective expansive binder. Hydration mechanism, property, compressive strength carried out to investigate effect CSA addition on ...

Abstract Purpose This paper aims to compare the environmental and social impacts of three types rafts for mussel farming in Spain. These structures, traditionally made wood, have a short lifespan and, because their service conditions, require frequent maintenance order be fully operational. An innovative solution with ultra-high performance concrete (UHPC) was developed 2016 by RDC, being at ba...

Abstract The addition of nano-silica to ultra-high-performance concrete (UHPC) increase its toughness has been proposed obtain nano-concrete (UHPNC). This work mainly studies the reinforcement effect UHPNC on filled steel tube (CFST) columns under long-term load. Ten CFST strengthened with were selected and reinforced UHPNC. influences different thicknesses layer contents axial compression prop...

Using ultra-high performance concrete (UHPC) as the pavement layer on orthotropic steel deck (OSD) can greatly enhance rigidity to solve fatigue cracking of and resulting damage layer. However, thin UHPC limits extensive use short stud connector. In this study, three types interfaces were designed by introducing different additives into epoxy matrix, shear properties each interface connector co...

Abstract In this paper, S95 grade ultrafine mineral admixture (UMA) was prepared by water quenched manganese slag and fly ash 1:1 compound mechanical ball milling to a specific surface area of 714 m2/kg. Its activity index 86.8% at 7d 96.3% 28d. The UMA has the characteristics small particle size, high activity. Mixing with powders different sizes, such as cement silica fume (SF), is helpful im...

Ultra-high-performance fibre-reinforced concrete (UHPFRC) manufacturing typically requires heat curing. UHPFRC production at a ready-mixed (RMC) plant is often difficult because specific equipment required for Concerns associated with ultra-high-performance (UHPC) construction include the energy costs and environmental impacts of curing transportation from factory to site. Few studies have been...

The application of ultra-high-performance concrete (UHPC) on top normal-strength (NSC) is a practical rehabilitation approach to maintaining degraded and damaged members. However, successful repair operation consequent adequate performance are very much dependent the ability interface between UHPC NSC present superior bonding under various surface conditions. Consequently, predicting strength b...

Accelerated bridge construction (ABC) utilizes advanced planning, new techniques and innovative detailing to expedite of bridges or rehabilitation replacement old deteriorated bridges. ABC has been widely used in low seismic regions mostly implemented the superstructure elements but much less considered for substructure such as column-base connections, especially moderate high regions. While ro...

Abstract In the construction industry, incorporation of steel fibers in ultra-high-performance concrete (UHPC) is vital for improving its mechanical characteristics. order to identify essential factors UHPC, literature on effect UHPC reviewed using scientometric methods this work. The review contains complex processes like knowledge mapping, co-occurrence, and co-citation. analyze bibliographic...