The effect of sample size and ground granulated Blast-Furnace Slag on Hydration Temperature in Hot Climates

الموضوعات

علوم تطبيقية وتكنولوجية

الملخص

Heat of hydration of Portland cement mixes is of great importance to civil engineers. While there is great deal of work being carried out on the hydration temperature of OPC-slag mixes, there is a lack in the literature of research work on the effect of such materials in real hot climates. The current research examines the influence of ground granulated blast-furnace slag (ggbs) as a partial cement replacement on temperature evolution during hydration in winter and summer in AI-Ain (interior region of the United Arab Emirates). Evolution of temperature inside the concrete was recorded by the aid of a Labview Program. A testing setup was developed to provide a continuous recording of temperature inside cement mixes by means of a computer, digital voltmeter and thermocouples. Concrete was prepared to study the effect of sample size and ggbs inclusion on the hydration temperature of cement mixes. Three concrete mixes of a similar cement content (450 kg/m 3 ) were tested. A plain ordinary Portland cement (OPC), a 50% OPC with 50 % ggbs; 25% OPC with 75% ggbs mixes were prepared. Also, 8% microsilica was added to all of these three mixes. The water-cement ratio was kept constant for all pastes. Cement type was determined to have a significant effect on the rate of rise in hydration temperature. Ground granulated blast-furnace slag (ggbs) reduced the temperature rise rate in all mixes and in all environments. Ggbs significantly increased the time needed to reach the peak temperature and it also reduced such peaks. Ggbs clearly reduced the differential change in temperature (difference between initial mix temperature and peak temperature) compared with plain OPC mixtures. Moreover, results indicated that the higher the ambient temperature, the faster the hydration rates and the shorter the time needed to reach these peaks. Also, the peak temperature within cubic samples was higher as sample size was increased.

روابط وملفات

التعريف والنوع

رقم الوثيقة

ef8460dc-f89a-4f21-9fc4-0114ff85c29d

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

8013_1.pdf

بيانات النشر

ترجمة العنوان

تأثير حجم العينة وخبث الحديد الناعم على حرارة تميؤ الخرسانة في الاجواء الحارة

ألقاب المؤلفين

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اللغة

English

المصدر والدورية

اسم المصدر

The effect of sample size and ground granulated Blast-Furnace Slag on Hydration Temperature in Hot Climates

المحتوى والصفحات

عدد الصفحات

0

إشراف وإعداد

الإشراف

يوسف حايك

الإعداد

مريم عيسى سعيد الحراصي

الاقتباسات الببليوغرافية