کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6713933 1428733 2018 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The application of a new oxidation mortar bar test to mixtures containing different cementing systems
ترجمه فارسی عنوان
استفاده از یک تست نوار جدید اکسیداسیون برای مخلوط های حاوی سیستم های مختلف سیمان سازی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی
The effects of different cementing systems on the expansion of mortars containing iron sulphide-bearing aggregate was studied. Using a recently developed oxidation mortar bar test, the results showed that cementing systems containing low-calcium fly ash, metakaolin, slag, high-sulphate resisting Portland cement, or low heat of hydration Portland cement could reduce the expansion by 50-85%. The main suggested mechanisms behind the reduced expansion is the more refined pore structure of samples with SCMs, and the reduced C3A of low heat of hydration Portland cement. The refined pore structure reduces the permeation of the oxidizing solution into the samples. The similarity of this to penetration of oxygen into concrete under field exposure needs to be determined. Soaking the samples for >3 h in the oxidizing agent can produce excessive expansion - not related to oxidation of iron sulphide phases - in samples with cementing blends containing reactive alumina such as metakaolin.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 173, 10 June 2018, Pages 775-785
نویسندگان
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