کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
259704 | 503641 | 2011 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Deicer salt-scaling resistance of non-air-entrained roller-compacted concrete pavements Deicer salt-scaling resistance of non-air-entrained roller-compacted concrete pavements](/preview/png/259704.png)
This paper investigates the effects of various pozzolans on the fresh and hardened performance of non-air-entraining, roller-compacted concrete pavement. Deicer salt-scaling resistance of the specimens was evaluated for freeze–thaw cycle conditions with either a long or a short freezing period. Water–cement ratios were 0.36 and 0.43. Natural pozzolan, fly ash and silica fume were used as partial replacements for the cement, by 8%, 20%, and 20%, respectively. The results showed that the pozzolans generally improved the consistency of the mixtures compared with reference samples. Introducing silica fume improved compressive strength and, particularly, salt-scaling resistance of the specimens. Salt scaling decreased as the duration of the freeze period in the freeze–thaw cycle decreased.
Research highlights
► Fly ash improved consistency of the RCCP mixtures more effectively than other pozzolans.
► Silica fume increased both compressive strength and salt-scaling resistance of the mixtures.
► As the freezing period increased to 18 h, the scaling rate increased considerably.
Journal: Construction and Building Materials - Volume 25, Issue 4, April 2011, Pages 1671–1676