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本文从外加剂入手,研究了不同外加剂以及不同粉煤灰掺量对混凝土不同龄期的力学性能及抗冻性能的影响。结果表明:混凝土受冻强度随粉煤灰掺量的增加而降低,故在高寒地区或冬季施工时,应该控制粉煤灰掺量;适应性好的外加剂复掺(也即防冻引气早强成分的外加剂复掺),不管对混凝土早期强度还是后期强度来说,都比只掺一种外加剂时的强度高,且28d强度提高10MPa左右,适宜用于高寒地区的实际施工。
In this paper, starting from the additive to study the different admixtures and different fly ash content of different age concrete mechanical properties and frost resistance. The results show that the freezing strength of concrete decreases with the increase of the content of fly ash, so the dosage of fly ash should be controlled in the alpine region or in the winter construction. The admixture with good adaptability Strong admixture), no matter the early strength or the late strength of concrete, the strength is higher than the one with only one admixture, and the strength of 28d is increased by about 10MPa, which is suitable for the actual construction in the alpine region.