Publications de Lei Xu | EPFL Graph Search

Publications associées (6)

New insights into the reaction mechanisms of calcium-based activators modified sodium carbonated activated slag: Precursor dissolution and carboaluminate generation

This study investigated the regulatory mechanism of calcium-based activators on the reaction kinetics of sodium carbonate-activated slag (SAS), with the aim of revisiting the conventional interpretation based on liquid-phase alkalinity enhancement. By inco ...

2025

Synergistic effect of waste concrete powder and traditional SCMs in preparing clinker-free cement: Hydration and microstructure evolution

Lei Xu

This study systematically examines the hydration behavior, microstructure, and mechanical performance of waste concrete powder (WCP) paste modified with ground granulated blast-furnace slag (GGBS) and fly ash (FA). Isothermal calorimetry, mercury intrusion ...

2025

Machine Learning-assisted Sustainable Mix Design of Waste Glass Powder Concrete with Strength-cost-co2 Emissions Trade-offs

Lei Xu

Glass powder, a non-degradable waste material, offers significant potential to reduce cement consumption and carbon emissions in concrete production. However, existing mix design methods for glass powder concrete (GPC) fail to systematically balance econom ...

MDPI2025

Investigating the ball-milled calcined coal gangue on the hydration of limestone blended cement

Lei Xu

Calcined coal gangue (CCG) exhibits promising application potential in limestone-cement binary binders. However, the activity of CCG would possibly be weakened due to the particle agglomeration after calcination. In the present research, we tried to overco ...

2025

Microscopic Mechanical Properties and Physicochemical Changes of Cement Paste Exposed to Elevated Temperatures and Subsequent Rehydration

Lei Xu

The effect of elevated temperatures and subsequent rehydration on the microscopic mechanical properties and physicochemical changes of cement pastes was investigated. Cement pastes with different grades (CEM I 42.5, CEM I 52.5) and different water-to-cemen ...

MDPI AG2025

Intelligent prediction framework for axial compressive capacity of FRP-RACFST columns

Lei Xu

Fiber reinforced polymer confined-recycled aggregate concrete filled steel tube (FRP-RACFST) not only proposes excellent load-bearing capacity and corrosion resistance, but is also an environmentally friendly structure due to the incorporation of recycled ...

ELSEVIER2024