Effect of Geometric Parameters (β and τ) on Behaviour of Cold Formed Stainless Steel Tubular X-Joints

Mussa, Mohamed H.; Mutalib, Azrul A.

doi:10.1007/s13296-018-0031-0

Cited by 8 publications

(2 citation statements)

References 18 publications

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“…The water was vapoured out from visible cracks distributed along the width of the unexposed concrete slab surface as well as along the installation holes of the thermocouples and reinforcement within the time range between 20 to 100 min. Similar phenomena were observed by previous scholars [56,[60][61][62]. Zeiml et al [63] indicated that the cracks occurred because of the tensile thermal stress and non-uniform temperature distribution.…”

Section: Moisture Contentsupporting

confidence: 84%

Fire Resistance of High-Volume Fly Ash RC Slab Inclusion with Nano-Silica

et al. 2021

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The study aims to investigate the fire performance of reinforced concrete (RC) slab fabricated from high volume fly ash inclusion with nano-silica (HVFANS) under ISO 834 load curve. The HVFANS concrete slab with dimensions of 1850 mm × 1700 mm × 200 mm was tested via an electrical furnace under an exposing temperature of 1100 °C for 120 min. The slab behaviour was evaluated in terms of residual compressive strength, temperature distribution along its thickness, spalling, and cracks. The results revealed that the slab was capable of maintaining 62.19% of its original compressive strength at room temperature after exposure to the above temperature. Moreover, the distribution of temperature revealed that the temperature of concrete cover and bottom reinforcement was less than 300 °C with a maximum spalling depth of 11 mm within the temperature range of 680 to 840 °C. Furthermore, the thermal conductivity index (K) of the HVFANS concrete was determined, and results indicated that thermal conductivity equalled 0.35 W/mK which is considered low, as compared with other concretes tested in current and previous studies.

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Section: Moisture Contentsupporting

confidence: 84%

Fire Resistance of High-Volume Fly Ash RC Slab Inclusion with Nano-Silica

et al. 2021

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“…It leads to the fact that the concrete material is in danger of fire exposure and dynamic loads simultaneously. The previous studies mainly focused on determining the response of normal strength concrete (NSC) under the combined effect of temperature and strain rate at a curing age of 28 days using the SHPB machine [20][21][22][23][24][25]. These studies concluded that the concrete strength reduced with temperature particularly above 400 • C and the dynamic increase factor (DIF) showed a linear relationship with strain rate.…”

Section: Introductionmentioning

confidence: 99%

Late Age Dynamic Strength of High-Volume Fly Ash Concrete with Nano-Silica and Polypropylene Fibres

Mussa

Abdulhadi

Abbood³

et al. 2020

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The dynamic behaviour of high-volume fly ash concrete with nano-silica (HVFANS) and polypropylene fibres at curing ages of 7 to 90 days was determined by using a split Hopkinson pressure bar (SHPB) machine. At each curing age, the concrete samples were laboratory tested at different temperatures conditions under strain rates reached up to 101.42 s−1. At room temperature, the results indicated that the dynamic compressive strength of plain concrete (PC) was slightly higher than HVFANS concrete at early curing ages of 7 and 28 days, however, a considerable improvement in the strength of HVFANS concrete was noted at a curing age of 90 days and recorded greater values than PC owing to the increase of fly ash reactivity. At elevated temperatures, the HVFANS concrete revealed a superior behaviour than PC even at early ages in terms of dynamic compressive strength, critical strain, damage and toughness due to increase of nano-silica (NS) activity during the heating process. Furthermore, equations were suggested to estimate the dynamic increase factor (DIF) of both concretes under the investigated factors.

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