How many freeze and thaw cycles per year?
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Freeze-thaw cycles per year vary depending on the location and context. In the conterminous United States, the annual frequency of freeze-thaw cycles ranges from about 250 days per year in mountainous regions of the West . In Alaskan permafrost landscapes, two sites were studied: Healy, which experiences over 40 freeze-thaw cycles annually, and Toolik, which experiences less than 15 freeze-thaw cycles annually . The specific number of freeze-thaw cycles per year in these locations was not mentioned in the abstracts provided.
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Open access 01 Jan 2000 2 Citations | The paper does not mention the number of freeze and thaw cycles per year. The paper is about the responses and performance of a test pavement to two freeze-thaw cycles. |
2 Citations | The paper mentions that the Healy site experiences more than 40 freeze-thaw cycles annually, while the Toolik site experiences less than 15 freeze-thaw cycles annually. |
44 Citations | The paper states that the annual frequency of freeze-thaw cycles in the conterminous United States is about 250 days per year in the mountainous regions of the West. |
| The paper mentions that the Healy site experiences more than 40 freeze-thaw cycles annually, while the Toolik site experiences less than 15 freeze-thaw cycles annually. |
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How does dosing air-entraining agents in concrete influence freeze thaw cycles?3 answersDosing air-entraining agents in concrete has a significant influence on freeze-thaw cycles. Increasing the amount of air-entraining agent (AEA) leads to an increase in porosity, number of air voids, and their size. However, this increase occurs up to a limit that coincides with the maximum recommended by the manufacturer. Concrete with a lower AEA content exhibits better freeze-thaw resistance, as it has a more impermeable matrix. The addition of air-entrainment agent (AEA) has the best effect on improving the salt freeze-thaw resistance of concrete. The use of recycled concrete aggregate (RCA) also increases the freeze-thaw resistance of concrete, as it provides extra voids and decreases capillary permeability. In conclusion, dosing air-entraining agents in concrete influences freeze-thaw cycles by affecting the porosity and permeability of the concrete, with lower AEA content and the use of RCA improving freeze-thaw resistance.
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