... electron microscopy (SEM). Findings Based on the results, the mechanical properties of all mortars improved at 250 °C, due to internal autoclaving and pore pressure effects. At 800 °C, the major phases observed in OPC and PLC mortars were calcium silicate and quartz. Large wollastonite and gehlenite...

...Suhang Yang; Gonglue Gao Purpose China has developed new fire-resistant steel grades, particularly Q420FR and Q460FR. Evaluating the residual mechanical properties of these steels after fire exposure is essential for post-fire damage assessment and potential structural reuse. This study aims...

... concrete grades at room and elevated temperatures. Design/methodology/approach The optimum mix is initially determined by varying zeolite replacement from 10% to 30%, silica fume at 7.5%, and Class C fly ash, which constitutes 10% by weight of cement. The mechanical properties of concrete, including...

... and mechanical properties of SCC. Findings The findings indicate that the inclusion of supplementary cementitious materials enhances the workability, strength and fire resistance of SCC to a greater extent compared to the addition of steel and polypropylene fibers. Practical implications The practical...

... decline in the parameters governing the mechanical properties of steel reinforcement due to the combined damage due to corrosion and fire. Corroded reinforcement still showed ductile failure after exposure to fire. Moreover, the combined loss of load-bearing characteristics due to corrosion and fire has...

... and 10 molarities (M). At elevated temperatures, concrete experiences deterioration of its mechanical properties which is in some cases associated with spalling, leading to the building collapse. Design/methodology/approach In this study, six geopolymer-based mix proportions are prepared with crimped...

.... 2001 ; Yaragal et al., 2015). Elevated temperature Post-fire curing Mechanical properties Recycled aggregate concrete Hybrid fibres Due to its simplicity of manufacturing and adaptability in moulding into various forms and sizes, concrete has become the largely...

...Izabela Hager; Stanisław Kańka; Mariusz Maślak Purpose The study presents test results concerning the impact of high temperature and different cooling conditions on the mechanical properties of quenched and self-tempered reinforcing steel. The purpose of this paper is to clarify the extent...

...Praveen Kamath; Umesh Sharma; Pradeep Bhargava; N. Bhandari; Asif Usmani Evaluation of mechanical properties of undamaged and damaged steel rebars at elevated temperature finds its applications in development of steel material models likely to be used in designing reinforced concrete structural...