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Investigating the effect of nanosilica on the compressive strength of hard concrete by considering Atomic Force Microscopy (AFM) examinations | ||
ADMT Journal | ||
مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 12 شهریور 1402 | ||
نوع مقاله: Original Article | ||
شناسه دیجیتال (DOI): 10.30486/admt.2023.1968434.1380 | ||
نویسندگان | ||
seyed mohammad mahdi shafiei1؛ mahboobeh pirizadeh2؛ Ebrahim Zolgharnein* 3 | ||
1Assistant Professor, Department of Mechanical Engineering, West Tehran Branch, Islamic Azad University, Tehran,, Iran | ||
2Assistant Professor, Department of Civil Engineering, West Tehran Branch, Islamic Azad University, Tehran,, Iran | ||
3Assistant Professor, Department of Civil Engineering, North Tehran Branch, Islamic Azad University, Tehran, Iran | ||
چکیده | ||
This study investigated the compressive strength of hardened concrete and the formation of Calcium Silicate Hydrate (C-S-H) with the addition of nanosilica (SiO2). Compressive strength testing was performed using ASTM C496 to determine stress-strain curves and compressive strength of the materials. The hydration process and formation of C-S-H and Calcium Hydroxide (CH) was examined using Atomic Force Microscopy (AFM) and Fourier Transform Infrared Spectroscopy (FTIR). Results indicate an increase in compressive strength using 1, 3 and 5% of nanosilica to concrete replacement by volume in comparison to the control mix (without nanosilica). The optimum concrete replacement to yield maximum strength was of the 5% nanosilica content. Comparing the 56 day results for the 3 and 5% of nanosilica replacement samples, notice the same percentage of C-S-H formation of 83 and 85%, respectively | ||
کلیدواژهها | ||
NanoSilica؛ Compressive Strength؛ Concrete؛ FTIR؛ AFM | ||
آمار تعداد مشاهده مقاله: 60 |