کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1455091 | 989019 | 2012 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Micro-structural development of gap-graded blended cement pastes containing a high amount of supplementary cementitious materials Micro-structural development of gap-graded blended cement pastes containing a high amount of supplementary cementitious materials](/preview/png/1455091.png)
To clarify the strength improvement mechanism of gap-graded blended cements with a high amount of supplementary cementitious materials, phase composition of hardened gap-graded blended cement pastes was quantified, and compared with those of Portland cement paste and reference blended cement (prepared by co-grinding) paste. The results show that the gap-graded blended cement pastes containing only 25% cement clinker by mass have comparable amount of gel products and porosity with Portland cement paste at all tested ages. For gap-graded blended cement pastes, about 40% of the total gel products can be attributed to the hydration of fine blast furnace slag, and the main un-hydrated component is coarse fly ash, corresponding to un-hydrated cement clinker in Portland cement paste. Further, pore size refinement is much more pronounced in gap-graded blended cement pastes, attributing to high initial packing density of cement paste (grain size refinement) and significant hydration of BFS.
Journal: Cement and Concrete Composites - Volume 34, Issue 9, October 2012, Pages 1024–1032