Journal of Materials in Civil Engineering, Journal Year: 2023, Volume and Issue: 35(10)

Published: July 28, 2023

Utilizing seawater and sea-sand for producing ultra-high performance concrete (UHPC) can substantially reduce raw materials costs alleviate the current freshwater river sand resources shortage in coastal marine areas. However, corrosion risk to reinforcing fibers inside UHPC caused by chlorides cannot be ignored. In this study, a new type of sustainable composed desalinated (UHPSSC) reinforced with stainless profile, super-fine wire (SSW) was developed. Its mechanical properties chloride content were studied. The research results show that SSWs do not rust after immersion seawater. flexural compressive strengths UHPSSC incorporating 1.5% are 13.8 MPa 138.6 MPa, respectively, toughness is increased 428.9%, reaching basic requirements UHPC. high specific surface area SSW enrichment silica fume on its enhance interfacial bond between fiber matrix, further promoting full play SSWs' mechanisms as proved decrease Ca/Si ratio at surface. C-S-H gels within ITZ well Friedel's salt conducive immobilize chlorides, blocking migration through matrix mitigating long-term SSWs. Overall, utilizing combination produce improved strength toughness, making it suitable choice applications where durability required.

Language: Английский