Influence of mineral admixtures and aggregates on properties of different concretes under high temperature conditions I: Experimental study

Reddy, D. Harinadha; Ramaswamy, Ananth

doi:10.1016/j.jobe.2017.09.013

Cited by 14 publications

(5 citation statements)

References 5 publications

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“…Furthermore, the influence of addition of fly ash in concrete significantly mitigates deterioration of mechanical properties and improves its resistance to spalling occurrence and cracks formation caused predominantly by the development of tensile stress under elevated temperature [88]. Khan and Abbass [50] studied the variation in tensile strength of concrete with and without fly ash at elevated temperature, they observed an increase tensile strength of range 33 -43 % for concrete with fly ash 40 -60% content respectively as initial temperature rises to 300 °C before declining at higher temperature level.…”

Section: Residual Tensile Strengthmentioning

confidence: 99%

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A review of residual strength properties of normal and high strength concrete exposed to elevated temperatures: Impact of materials modification on behaviour of concrete composite

Babalola

Awoyera

et al. 2021

Construction and Building Materials

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Section: Residual Tensile Strengthmentioning

confidence: 99%

“…16. Behaviour of natural and recycled aggregate concrete residual compressive strength after elevated temperature (data from: [9,21,23,27,33,36,37,31,51,54,55,49,40,41,42,46,48,88,57]. compressive strength compared to natural river sand aggregate and 100% fine recycled aggregate.…”

Section: Residual Compressive Strengthmentioning

confidence: 99%

A review of residual strength properties of normal and high strength concrete exposed to elevated temperatures: Impact of materials modification on behaviour of concrete composite

Babalola

Awoyera

et al. 2021

Construction and Building Materials

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“…They found disintegration of the fractural energy and ultimate strength characteristics with respect to temperature. Reddy & Ramaswamy [25] evaluated the high-temperature effect on various concretes under the influence of different admixtures and aggregates. The observations from the studies demonstrated that the residual strength of concrete varied under high-temperature conditions.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Postfire Structural Performances of Concrete under Elevated Temperatures

Murugan,

Bahrami,

Srivastava

et al. 2023

Civ Eng J

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This article investigates the mechanical and postfire structural performances of concrete under elevated temperatures (200°C, 400°C, 600°C, and 800°C) after 7 and 28 days of concrete curing. The main objective of this study is to evaluate the post-fire behavior of concrete structures and how their modulus of elasticity values influence their structural parameters. Mechanical studies, namely, the compressive strength, splitting tensile strength, and flexural strength, were performed on cubes, cylinders, and prism beams under normal and elevated temperatures. Non-destructive tests, like rebound hammer and ultrasonic pulse velocity, were also conducted on concrete cubes to obtain the strength of concrete before and after heating the specimens. Microstructural studies, in particular, scanning electron microscope and energy dispersive x-ray spectroscopy, were done to analyze the changes in the chemical composition of concrete under the effect of the temperatures. The weight loss of the concrete specimens was assessed under the elevated temperatures. The results indicated that the geometric shapes of the specimens influenced the loss in the moisture content of concrete under an elevated temperature scenario. Microstructural studies revealed the changes in the chemical composition under the elevated temperatures. The results of this research can be further integrated for industrial applications. Doi: 10.28991/CEJ-2023-09-08-04 Full Text: PDF

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“…The exposure of recycled aggregate concrete structures to high temperatures during fire scenarios degrades their mechanical properties [5][6]. A key fire safety design requirement according to European standard, EN 1992-1-2 [7] is that the load bearing capacity of concrete exposed to high temperature due to fire can be assumed.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Post Fire Mechanical Performance of Recycled Aggregate Concrete Containing Ground Granulated Blast Furnace Slag

Tung,

Babalola,

2023

E3S Web Conf.

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Structures made from recycled aggregate concrete are exposed to high temperatures during fire scenarios which degrade their mechanical properties. Hence, this study investigated the residual mechanical properties of recycled aggregate concrete (RAC) containing ground granulated blast furnace slag (GGBS) after exposure to elevated temperatures. 21 experimental runs for design mix of RAC considering recycled coarse aggregate (RCA) replacement of natural coarse aggregate at 50, 75, and 100%, GGBS replacement of cement at 0, 20, 40, and 60% and water to binder ratio at 0.4 and 0.5 levels were used. The residual mechanical properties of RAC including compressive strength, splitting tensile strength, and elastic modulus were determined through laboratory experimental tests at room temperature (about 25°C) and after exposure to elevated temperatures of 200, 400, 600, and 800°C. Experimental results showed that residual mechanical properties of RAC decreased with increasing temperatures but their resistance to degradation was significantly enhanced with the addition of GGBS at 40% GGBS content. The novel model developed for the prediction of residual compressive strength of RAC has high prediction accuracy based on the performance metrics used to evaluate the model performance. The model has p-values less than 0.0001, a high R² value of 0.9781, a low root mean square error (RMSE) of 1.456 and mean absolute percentage error (MAPE) of 0.2287. Overall, the study contributed immensely to the knowledge of RAC as a sustainable alternative to normal concrete in areas prone to exposure to high temperatures which will significantly aid the effective fire safety design of structural members produced with recycled aggregate concrete.

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Influence of mineral admixtures and aggregates on properties of different concretes under high temperature conditions I: Experimental study

Cited by 14 publications

References 5 publications

A review of residual strength properties of normal and high strength concrete exposed to elevated temperatures: Impact of materials modification on behaviour of concrete composite

A review of residual strength properties of normal and high strength concrete exposed to elevated temperatures: Impact of materials modification on behaviour of concrete composite

Mechanical and Postfire Structural Performances of Concrete under Elevated Temperatures

Investigation of Post Fire Mechanical Performance of Recycled Aggregate Concrete Containing Ground Granulated Blast Furnace Slag

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