The performance of Fly ash and Metakaolin concrete at elevated temperatures

Nadeem, Abid; Memon, Shazim Ali; Lo, Tommy Y.

doi:10.1016/j.conbuildmat.2014.02.073

Cited by 163 publications

(69 citation statements)

References 24 publications

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“…The residual compressive strength observed for reference and ceramic sand specimens increases up to 200°C and then decreases with further rise in temperature. The gain in compressive strength is due to loss of calcium hydroxide . Calcium hydroxide is normally consumed in thermal reactions, and the drop in CH content at elevated temperature is beneficial for the microstructure.…”

Section: Resultsmentioning

confidence: 99%

“…Calcium hydroxide is normally consumed in thermal reactions, and the drop in CH content at elevated temperature is beneficial for the microstructure. According to the available literature, microcracking, which was reported to initiate around CH crystals and then around unhydrated cement particles, was found to be a major cause of deterioration when concretes were exposed to high temperatures . In case of water cooling for 800°C, the performance of C50 mix is slightly better than rest of the mixes, the reduction in compressive strength was 30%, while C0 and C100 varied between 40% and 38%.…”

Section: Resultsmentioning

confidence: 99%

“…They reported that along with 10% aeration the mechanical performance of annealed (1250°C) calcium aluminate concrete was better than that of ordinary Portland cement concrete. Nadeem et al evaluated the performance of fly ash and metakaolin concrete on exposure to elevated temperature. They concluded that metakaolin concrete samples should be carefully used in structures where temperature higher than 400°C are expected.…”

Section: Introductionmentioning

confidence: 99%

“…The elevated temperatures selected are commonly considered in various studies. [11][12][13][14][15][16][17][18] Two different cooling regimes namely air cooling and water cooling were selected. The water cooling regime simulated the water-based fire fighting system commonly used in many countries.…”

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Influence of fine ceramic aggregates on the residual properties of concrete subjected to elevated temperature

et al. 2018

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Summary The residual properties of concrete subjected to elevated temperature are of importance to assess the stability of the structure. This paper investigates the performance of concrete containing white ware ceramic sand exposed to elevated temperature. Concrete mixes containing 0%, 50%, and 100% ceramic sand were prepared. The specimen were exposed to elevated temperatures of 200°C, 500°C, and 800°C for a duration of 60 minutes. Their residual mechanical properties (compressive strength, split tensile strength), ultra sonic pulse velocity, and mass change for different cooling regimes were investigated and compared among specimen. The results showed that incorporation of ceramic sand in concrete mixes improved the resistance against elevated temperature of hardened concrete.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Influence of fine ceramic aggregates on the residual properties of concrete subjected to elevated temperature

et al. 2018

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“…The thermal resistance of the concrete depends on the type of material used. Many studies have shown extensive damage or even catastrophic failure at high temperatures, particularly to high strength concretes [35,36]. Concrete deteriorates, changes in the morphology of thermally treated concrete, microcracks, voids, increasing the porosity of concrete, deformed Ca(OH) 2 crystals, disrupted C-S-H phase boundaries, breakdown of the cement gel structure and loss in compressive strength, when exposed to fire [37].…”

Section: Introductionmentioning

confidence: 99%

Microstructure of composite cements containing blast-furnace slag and silica nano-particles subjected to elevated thermally treatment temperature

Heikal

Al-Duaij

Ibrahim

2015

Construction and Building Materials

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Influence of cooling methods on high‐temperature residual mechanical characterization of strain‐hardening cementitious composites

Kumar,

Soliman,

Ranade

2023

Fire and Materials

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Residual strength tests are commonly used to characterize the high‐temperature mechanical properties of concrete materials. In these tests, the specimens are heated to a target temperature in a furnace and then cooled down to room temperature, followed by mechanical testing at room temperature. This research investigates the influence of the cooling method on the residual strength of Strain Hardening Cementitious Composites (SHCC) after exposure to 400°C and 600°C. Two types of cooling methods — furnace‐cooling (within a closed furnace) and water‐cooling (immersed in a water tank) — were adopted. Four different SHCC previously investigated by the authors for high‐temperature residual mechanical and bond behavior with steel were studied. Two different specimen sizes were tested under uniaxial compression and flexure to characterize the residual compressive strength and modulus of rupture. The effect of the cooling method was prominent for the normalized residual modulus of rupture at 400°C, but not at 600°C. The cooling method had no effect on the normalized residual compressive strength of any material at either of the two temperatures, except one of the SHCC (PVA‐SC) at 400°C. Specimen size also had no effect on the normalized residual compressive strength and modulus of rupture irrespective of the cooling method.

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The performance of Fly ash and Metakaolin concrete at elevated temperatures

Cited by 163 publications

References 24 publications

Influence of fine ceramic aggregates on the residual properties of concrete subjected to elevated temperature

Influence of fine ceramic aggregates on the residual properties of concrete subjected to elevated temperature

Microstructure of composite cements containing blast-furnace slag and silica nano-particles subjected to elevated thermally treatment temperature

Influence of cooling methods on high‐temperature residual mechanical characterization of strain‐hardening cementitious composites

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