کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5469098 | 1519052 | 2017 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Aggregate size effect on the development of cementitious compounds in a lime-treated soil during curing
ترجمه فارسی عنوان
تأثیر اندازه کامل در توسعه ترکیبات سیمان در خاک های تحت پوشش آهک در طی درمان
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کلمات کلیدی
خاک تحت پوشش آهک، اندازه کامل، زمان بهبودی، ترکیب مواد معدنی، ریز ساختار،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
ژئوشیمی و پترولوژی
چکیده انگلیسی
This work aims to investigate the aggregate size effect on changes in mineralogical composition and microstructure of lime-treated compacted soils. Three soil powders with different maximum aggregate sizes (Dmax = 5, 1 and 0.4 mm) were prepared prior to the treatment with 2% of lime. X-ray diffraction (XRD), environmental scanning electron microscope (Env. SEM) coupled with chemical analysis using energy dispersive X-ray spectrometry (EDX) and mercury intrusion porosimetry (MIP) were used to analyse untreated and treated samples at various curing times. Crystallized C-S-H on tobermorite form was identified in the lime-treated soil prepared with large aggregates after one year curing, and an evident increase in nanopores < 0.1 μm C-S-H was also observed due to C-S-H creation. By contrast, in the case of smaller aggregates, no obvious C-S-H peaks were observed by XRD technique after the same curing time, even though some evidence of such phases are provided by Env. SEM coupled to EDX analysis. But a large amount of undetectable nanopores < 6 nm (considering the MIP technical limitation) was supposed to be formed and could be attributed to the creation of nanocrystallized C-S-H or poorly-crystallized C-S-H (that may fill the pores larger than 2 μm). Such type of C-S-H phases occurred when lime was coated in thin layer on the large surface associated to lime-treated soil prepared with small aggregates.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Clay Science - Volume 136, February 2017, Pages 58-66
Journal: Applied Clay Science - Volume 136, February 2017, Pages 58-66
نویسندگان
Yejiao Wang, Myriam Duc, Yu-Jun Cui, Anh Minh Tang, Nadia Benahmed, Wen Jing Sun, Wei Min Ye,