...Suhang Yang; Gonglue Gao Purpose This study aims to systematically investigate the post-fire mechanical behavior of 630 MPa thermomechanically rolled reinforcing bars subjected to elevated temperatures and different cooling regimes. By combining tensile testing, microstructural analysis...

.../methodology/approach This study examines the influence of various NMs, including nFA, nGS and nBT, on the impact resistance of alkali-activated nano concrete (AANC) when subjected to elevated temperatures ranging from 200 °C to 800 °C. The results reveal notable changes in impact energy, weight loss, crack...

... to the combination of FA and GBFS at elevated temperatures due to more peaks of CSH and insignificant micro-cracks. Originality/value This article demonstrates the strength and potential of concrete incorporating GBFS and FA for application in adverse environmental conditions with higher thermal gradients...

...-use rights only Concrete Elevated temperature Micro-silica Polypropylene fibers Residual strength Table 10 Cement weight and micro-silica and polypropylene percentages and the obtained slump Design Control 1 2 3 4 5 6 7 8 9 10 11 Cement (kg...

..., which is case-specific. There is a need to develop design equations from first principles to design/find the residual strength of the column at elevated temperatures. The present study aims to develop equations from stress block parameters to find the residual strength of reinforced concrete (RC...

...Pramod Kumar; Bheem Pratap; Anasuya Sahu Purpose This study explored the effects of incorporating RA into geopolymer concrete, particularly examining its performance under ambient and elevated temperatures ranging from ambient temperature to 700°C. Design/methodology/approach The current study...

... the use of heat during manufacturing. Consequently, it becomes essential to gain a comprehensive understanding in the behavior of CFS sections when exposed to fire or elevated temperatures. Design/methodology/approach In this study, sections of 1.5 m length and 2 mm thickness were taken and analyzed...

... methodologies and structural design accuracy, ultimately bolstering fire safety protocols. This section offers a review of previous literature focused on evaluating the performance of RC beams exposed to elevated temperatures, initially addressing studies WOP followed by those incorporating pre-loading...

... of the CFS sections. The axial resistance and yield deformation were noted for both section types at elevated temperatures. The CFS column sections were modelled to simulate the section's behaviour under various temperature exposures using the general-purpose finite element (FE) program ABAQUS. The results...

... temperature, regardless of the exposure conditions, and there was no weight loss noticed. For 200 and 300 °C, the strengths were decreased compared to normal temperature and an elevated temperature of 100 °C, as weight loss of concrete specimens are observed to be decreased at these temperatures. So...

... 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...

... the present conditions in the steel-framed assembly. The assembly simulates the realistic forces subjected to joints of the beam at elevated temperatures (Fischer and Varma, 2017 ; Eslami et al., 2018 ; Rezaeian and Eghbali, 2021). Due to the symmetry of geometry, boundary and loading conditions...

... loading system exposed to different sustained elevated temperatures are being investigated. Design/methodology/approach RCA is substituted for Natural Coarse Aggregates (NCA) at 0, 50 and 100 percentages. The study involves testing of 150 mm cubes and beams of size (700 × 150 × 150) mm, i.e...

... of Ground Granulated Blast Furnace Slag (GGBS) and fly ash–blended laterized mortars at elevated temperatures. Design/methodology/approach This test program includes the replacement of natural river sand with lateritic fine aggregates (lateritic FA) in terms of 0, 50 and 100%. Also, the ordinary...

...Naveen Revanna; Charles K.S. Moy Purpose A study on the mechanical characteristics of cementitious mortar reinforced with basalt fibres at ambient and elevated temperatures was carried out. To investigate their effect, chopped basalt fibres with varying percentages were added to the cement mortar...

...G. Jaya Kumar; Tattukolla Kiran; N. Anand; Khalifa Al-Jabri Purpose Most of the industrial buildings which are designed to moderate loads are constructed using light gauge cold-formed steel (CFS) sections. Residual mechanical properties of CFS sections exposed to elevated temperature need...

.../approach Several concrete specimens (cubes, cylinders and prisms), which were casted using AA binders, were further tested for mechanical properties after exposure to elevated temperatures of 200 °C, 400 °C, 600 °C and 800 °C. Additionally, to understand the structural behavior in uniaxial compressive...

... and cylinders with 300 mm length and 150 mm diameter with hybrid fibres (0.15% polypropylene fibres + 0.35% steel fibres) along with fly ash. The specimens were exposed to elevated temperatures between 400 to 700°C with 100°C intervals for 2 h of duration and the post-fire exposed samples were further subjected...

...Bishwajeet Choubey; Virendra Kumar; Sekhar Chandra Dutta; Saurav Kumar Saikia Purpose The purpose of the paper is to mathematically model and predict the characteristics of thermo-mechanically treated (TMT) rebar when subjected to elevated temperatures. Design/methodology/approach Data were...

...Hala Mohamed Elkady; Ola Bakr Shalaby; Mohamed Kohail; Elsayed Abdel Raouf Nasr Purpose This paper presents the second part of the investigation on resistance to elevated temperatures of a proposed hybrid composite concrete (NCSF-Crete) mix. The composite including nano metakaolin (NC) and steel...