Influence of binary antifreeze admixtures on strength performance of concrete under cold weather conditions

Khan, Jeeshan; Kumar, G. Santha

doi:10.1016/j.jobe.2020.102055

Cited by 13 publications

(5 citation statements)

References 14 publications

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“…Karagol et al [11] proved these statements by having their cementitious samples prepared with an antifreeze admixture; as a result, samples cured at -10 °C could achieve a compressive strength of 25 MPa compared to 1.3 MPa for the control without an antifreeze admixture. Similarly, findings by Khan and Kumar [12] in Figure 6 depict that the compressive strength and the development of strength of samples cured at below freezing curing conditions were significantly smaller and slower than those of samples cured at the standard condition because of the decrease in cement reaction rates.…”

Section: Below-freezing Curing Temperaturessupporting

confidence: 62%

Effects of curing temperature on cement-stabilized soils

Tran,

Ju,

Nguyen

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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Curing temperature is widely known for its effects on the strength of various cementitious-based civil engineering materials, including in stabilized soils. Curing materials at different temperatures can cause negative or positive impacts on the mechanical properties of these materials due to the effect of temperature on hydration behavior, hydration rate, and ion exchange. This paper aims to better understand these factors in geoengineering applications. In particular, the discussion focuses on the effects of curing temperatures ranging from below freezing to 50 °C on the hydration process of cement paste (i.e., hydration rate, mineral dissolution, compressive strength) and the hydration process and strengthening mechanism of cement-stabilized soils. Finally, an informative table listing the advantages and disadvantages of the influences of each temperature level on these materials is provided as a summary of the findings from the literature.

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Section: Below-freezing Curing Temperaturessupporting

confidence: 62%

Effects of curing temperature on cement-stabilized soils

Tran,

Ju,

Nguyen

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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“…The freezing point of the solution decreased with increasing ion concentration according to Raoultʼs law 14) . Sub-zero curing temperatures can damage the microstructure of cementitious systems during the exposure of hardened concrete to cold weather conditions；the water inside the concrete pores generally tends to become ice, causing an increase the volume around 9％ 15) . However, our experiments have shown that there was no freezable water after 14 days when W/C ratio is below than 0.39.…”

Section: Resultsmentioning

confidence: 99%

Influence of Pre-Curing Period at Sub-Zero Temperature （-20℃） on the Compressive Strength of Concrete

NARANTOGTOKH

Nishiwaki

Pushpalal

et al. 2023

Cement Science and Concrete Technology

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：Average temperatures over most of Mongolia are below freezing from November through March. The lowest temperatures in January are as low as −36℃ to −40℃. However, in the extremely cold climate of Mongolia, it is often executed the concrete works even outside temperature is below −20℃. Therefore, in this experimental work, we investigated the required time span of pre-curing in order to achieve the potential strength at 28 days before being exposed to extremely low temperature (−20℃) , simulating Mongolian weather conditions. Moreover, internal temperature changes and microstructure analyses have been executed. We have found that concrete freezing temperature decreases remarkably from 0℃ to −15.6℃ with increasing pre-curing time, however, depending on the watercement (W/C) ratio. Our experiments have shown that there was no freezable water after 14 days when the W/C ratio is below 0.39. Our research concluded that concrete should at least be cured at 20℃ for 14 days before being exposed to sub-zero temperatures, in order to reach in fair to middling potential strength at 28 days.

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“…Bu etkiler dışarıya doğru baskı uygulayarak çevrede yüksek hidrolik basınç oluşturur. Bu nedenle beton, yeterli priz ve sertleşme sağlanana kadar taze ve sertleşmiş hallerde donmaya karşı korunmalıdır [10].…”

Section: Soğuk Hava Koşullarinda Betonunclassified

Sıcak ve Soğuk Havalarda Dökülen Betonun Dayanım Özellikleri ve Alınması Gereken Tedbirler

2023

Proceeding Book of 2nd International Conference on Frontiers in Academic Research ICFAR 2023

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Influence of binary antifreeze admixtures on strength performance of concrete under cold weather conditions

Cited by 13 publications

References 14 publications

Effects of curing temperature on cement-stabilized soils

Effects of curing temperature on cement-stabilized soils

Influence of Pre-Curing Period at Sub-Zero Temperature （-20℃） on the Compressive Strength of Concrete

Sıcak ve Soğuk Havalarda Dökülen Betonun Dayanım Özellikleri ve Alınması Gereken Tedbirler

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