کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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258529 | 503620 | 2012 | 10 صفحه PDF | دانلود رایگان |
This study investigated the alkali–silica reaction of accelerating admixtures for shotcrete. Tests were performed with two types of cement (low- and high-alkali) and three types of accelerating admixture (alkali-free, cement-based mineral and aluminate). An expansion test was performed to determine the alkali–silica reactivity according to ASTM C 1260. The results showed that the expansion increased with the total equivalent alkali content of the specimens. To examine this finding statistically, analyses were conducted at the 95% confidence level. When the low-alkali cement was used, no difference appeared to exist in the expansion after a reasonable period of time regardless of the accelerating admixture. In contrast, when the high-alkali cement was applied, the expansion of the specimens varied with time, although no difference was observed between the expansions of the plain sample and the specimen using the alkali-free accelerating admixture.
► The alkali–silica reaction of accelerating admixtures for shotcrete was investigated.
► A significant difference in expansion was observed according to the accelerating admixture.
► To examine this finding statistically, analyses were conducted at the 95% confidence level.
Journal: Construction and Building Materials - Volume 30, May 2012, Pages 330–339