Air-void parameters measurement of fresh concrete and hardened concrete
Air-void parameters measurement of fresh concrete and hardened concrete
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新拌混凝土和硬化混凝土的气孔参数测量
DOI:
10.1007/s11771-013-1590-z
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发表时间:
2013-04
影响因子:
--
通讯作者:
李化建
中科院分区:
文献类型:
--
作者:
李化建
Air content, spacing factor and specific surface of fresh concrete and hardened concrete with different air contents, slumps and mineral admixtures (fly ash, slag, fly ash + slag, fly ash + slag + silica fume composite) were studied by the air-void analyzer (AVA) method and the microscopical method. The correlations between the test results obtained from different methods were analyzed. The results show that, there is a close correlation of air content and spacing factor between the fresh concrete and the hardened concrete, but the specific surface correlation is weak. The air content of concrete measured by the AVA method is smaller than that of the pressure method and the microscopical method, because AVA device captures only the air voids with the size smaller than 3 mm. Spacing factor of the fresh concrete measured by the AVA method is greater than that of the hardened concrete measured by the microscopical method, while the specific surface is smaller. When the criterion of 4%–7% air content measured by the pressure method and microscopical method is acceptable for concrete freezing-thawing (F-T) durability in cold weather, the air content measured by the AVA method should be 2.4%–4.6%. For the concrete F-T durability, when the criterion of the spacing factor measured by the microscopical method is 300 μm, the spacing factor measured by the AVA method should be 360 μm.
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DOI:
10.21236/ada583906
发表时间:
2013-07
期刊:
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影响因子:
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发表时间:
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影响因子:
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通讯作者:
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DOI:
10.1520/jai12547
发表时间:
2006-02
期刊:
Journal of Astm International
影响因子:
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