کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
274627 505359 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Physico-chemical characteristics of blended cement pastes containing electric arc furnace slag with and without silica fume
ترجمه فارسی عنوان
ویژگی های فیزیکی شیمیایی مخلوط سیمان حاوی سرباره کوره قوس الکتریکی با و بدون سیلیکا
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی

Filled-pozzolanic cement pastes were made by different replacements of OPC by electric arc furnace slag (EAFS) with silica fume (SF) at water/cement ratio of 0.27. The pastes were hydrated up to 90 days. At each time interval, the physico-chemical characteristics of the hardened cement pastes were studied and related to the structure of the hardened pastes and the role of EAFS replacement as a filler in the hardened OPC-EAFS pastes. It was found that the optimum replacement of OPC by EAFS for the improvement in hydraulic properties of filled cement pastes is 6%. High replacement of OPC by EAFS (10% or 15%) causes a notable deterioration in the compressive strength at all ages of hydration. The replacement of EAFS in Mix (90% OPC + 10% EAFS) by 4% SF causes a marked improvement in the mechanical properties for the hardened pastes of Mix (90% OPC + 6% EAFS + 4% SF). The DSC thermograms for all pastes indicated the formation of nearly amorphous calcium silicate hydrates, calcium sulphoaluminate hydrates, calcium aluminate hydrates and portlandite. The SEM micrographs showed that the partial substitution of OPC by EAFS and/or SF leads to more dense structures as compared to the neat OPC paste.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: HBRC Journal - Volume 11, Issue 3, December 2015, Pages 321–327
نویسندگان
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