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الرئيسية > The Hydration Mechanism and Hy...>الوصف

The Hydration Mechanism and Hydrothermally Hardened Specimens Made of Autoclaved OPC– GGBFS – GS Blends

المصدر: المجلة العلمية لكلية التربية
الناشر: جامعة مصراتة - كلية التربية
المؤلف الرئيسي: Mohemed, Salima Moftah (Author)
المجلد/العدد: س3, ع11
محكمة: نعم
الدولة: ليبيا
التاريخ الميلادي: 2018
الشهر: سبتمبر
الصفحات: 57 - 75
رقم MD: 1007636
نوع المحتوى: بحوث ومقالات
اللغة: الإنجليزية
قواعد المعلومات: EduSearch
مواضيع:
المعالجة الحرارية | الرمل الأرضي | الكيمياء
كلمات المؤلف المفتاحية:
Ordinary Portland Cement (OPC) | Ground Sand (GS) | Ground Granulated Blast-Furnace Slag (GGBFS)
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المستخلص: Different autoclaved specimens were prepared using ordinary Portland cement (OPC) and ordinary Portland cement– ground granulated blast-furnace slag (OPC-GGBFS) with the presence and absence of sand. All autoclaved specimens were prepared by the hydrothermal curing at a pressure of 8 atm. of saturated steam for different autoclaving ages of 0.5, 2, 6, 12 and 24 hours. The Kinetics of hydration process were studied via determination of chemically combined water and free lime contents at the different autoclaved ages up to 24 hours. The specimens made of OPC and OPC-GGBFS-GS blends were found to have higher strength values at almost all autoclaving ages. This attributed to the formation calcium of silicate hydrates (CSH) and calcium hydroxide (CH) hydrates, as the main hydration products, which possess a stronger hydraulic character with higher compressive strength. The hydrothermally hardened OPC-GGBFS pastes were found to have weaker strength, which could be due to the formation of calcium aluminosilicate hydrates (C3ASH4).

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