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Iranian Journal of Chemistry and Chemical Engineering، جلد ۴۳، شماره ۱۰، صفحات ۳۷۳۷-۳۷۴۷
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عنوان انگلیسی Compatibility studies of N-A-S-H and C-A-S-H Gels in Alkali-Activated Geopolymer Mortar
چکیده انگلیسی مقاله The primary reaction products in the alkali-activated green tuff alumino-silicate geopolymer mortar are Natrium (sodium) Aluminum-Silicate Hydrate (N-A-S-H) and Calcium Aluminum-Silicate Hydrate (C-A-S-H) gels. The alkaline activation was achieved using NaOH with a molarity of 4 mol/dm3 and sodium silicate with a ratio of 2.3–2.4. Alkaline activators represent a possible solution for a sustainable environment and reducing CO2 emissions. The presence of sodium hydroxide with higher alkalinity indicates the decomposition of sodium at an older age, as seen in SEM-EDS, XRD, XRF, and FT-IR analyses, and eventually cracking. The main phase present in the alkali-activated green tuff mortar with the optimal sodium hydroxide with a molarity of 4 mol/dm3 are calcium silicate hydroxide hydrate (Ca4.5Si6O15 (OH)3 2H2O), sodium calcium aluminum silicate hydrate (Na3Ca3.36Al9.68Si26.56O72 (H2O)24.48), zeolite (Si8Al4Ca2O24 (H2O)12), sodium silicate hydrate (Na4.12Si36O72 (H2O)23.12) and sodium aluminum silicate hydrate (Na4.12Si36O72 (H2O)23.12). At the initial stages, calcium in slag from the forging furnace stabilizes (N, C)-A-S-H gels, causing C-A-S-H gels to predominate over N-A-S-H. Over time, the trend reverses, with N-A-S-H becoming dominant. Ternary compositional diagrams show the range of chemical elements and the assemblage of resulting phases (minerals) at 180 days of age.
کلیدواژه‌های انگلیسی مقاله Green Tuff,Alkali-Activated Mortars (AAMs),Mortar,Geopolymer,N-A-S-H
نویسندگان مقاله Parand Razeghi Tehrani |
Department of Civil Engineering, Roudehen Branch, Islamic Azad University, Roudehen, I.R. IRAN

Mohammad Ali Arjomand |
Department of Civil Engineering, Shahid Rajaee Teacher Training University, Tehran, I.R. IRAN

Azita Behbahaninia |
Department of Civil Engineering, Roudehen Branch, Islamic Azad University, Roudehen, I.R. IRAN

Nargess Kargari |
Department of Environment, Takestan Branch, Islamic Azad University, Takestan, I.R. IRAN

نشانی اینترنتی https://ijcce.ac.ir/article_717124_3cd48a8c18622332e04162fef3148d23.pdf
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