کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7969189 | 1514347 | 2018 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Nanoscale attraction between calcium-aluminosilicate-hydrate and Mg-Al layered double hydroxides in alkali-activated slag
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Nanoscale attraction between calcium-aluminosilicate-hydrate and Mg-Al layered double hydroxides in alkali-activated slag Nanoscale attraction between calcium-aluminosilicate-hydrate and Mg-Al layered double hydroxides in alkali-activated slag](/preview/png/7969189.png)
چکیده انگلیسی
Calcium-aluminosilicate-hydrates (C-A-S-H) and Mg-Al layered double hydroxides (LDHs) are widely identified as the two main hydrated phases formed in alkali-activated slag (AAS), regardless of reactant composition. In addition to the precipitates of microscale crystals, Mg-Al LDHs can be intermixed particularly with the C-A-S-H in the inner product of AAS. This study aims at revealing the intermixing behaviors of C-A-S-H and Mg-Al LDH down to the nanometer scale using multiple advanced characterization techniques. The results show that the nanocrystalline C-A-S-H and Mg-Al LDH grains are thoroughly distributed in the background of an amorphous matrix. It is observed that Mg-Al LDH nanocrystalline grains with a size of about 15 to tens of nanometer strongly attach to the C-A-S-H nanocrystalline grains. The findings support the hypothesis that the positively-charged LDH layers are strongly attracted to the negatively-charged C-A-S-H layers during alkali-activation. This study contributes to a better understanding of the alkali-activated process as well as phase formation and distribution in this system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Characterization - Volume 140, June 2018, Pages 95-102
Journal: Materials Characterization - Volume 140, June 2018, Pages 95-102
نویسندگان
Hailong Ye,