کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7884498 | 1509713 | 2018 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The origin, composition and early age hydration mechanisms of Austrian natural Portland cement
ترجمه فارسی عنوان
منشاء، ترکیب و مکانیزم هیدراتاسیون سنین اولیه سیمان پرتلند طبیعی اتریش
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی صنعتی و تولید
چکیده انگلیسی
The chemical and mineralogical properties of cement residues and hydration products have been assessed in historical Portland cement mortars. Results indicate a long time of burning and residence and a slow cooling rate. C2AS, CS and under burned raw material residues suggest inhomogeneous heat distribution typical for shaft kilns. Additionally, minor amounts of $-C2S, C5S2$, C4A3$ and CaS refer to the burning of a pyrite-bearing marlstone and a brown coal used as a solid fuel. Monosulfoaluminate intermixed with monocarboaluminate predominantly concentrate in the inner hydration products confirming the absence of interground calcium sulfate as a retarding agent. The distribution of AFm phases suggests the dissolution of sulfur from the sulfur-bearing cement residues and subsequent carbonation in the later stage of hydration. The coarse grain size of the cement and the presumable application of a historical deactivation method resulted in the formation of high microporosity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cement and Concrete Research - Volume 110, August 2018, Pages 1-12
Journal: Cement and Concrete Research - Volume 110, August 2018, Pages 1-12
نویسندگان
Farkas Pintér, Christophe Gosselin,