کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
257557 503593 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Engineering properties of cementless concrete produced from GGBFS and recycled desulfurization slag
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Engineering properties of cementless concrete produced from GGBFS and recycled desulfurization slag
چکیده انگلیسی


• GGBFS and DS were utilized for the preparation of cementless concrete.
• GGBFS/DS cementless concrete, the compressive strength can be reached 14 MPa.
• A series of performances of cementless concrete with GGBFS/DS are satisfactory.
• Addition of SP, the performances of GGBFS/DS cementless concrete are improved.
• A delay of the initial setting time was observed with the addition of SP.

This study used the byproducts of steel manufacturing, ground granulated blast furnace slag (GGBFS) and desulfurization slag (DS), to produce cementless concrete. Superplasticizers (SP) were added to improve the higher water absorption of DS and enhance the compressive strength of cementless concrete. The feasibility of manufacture was evaluated by the engineering properties of slump, setting time, compressive strength, length change, sulfate attack resistance and scanning electron microscopy (SEM) analysis. The results showed that 14 MPa could be obtained with the addition of 550  kg/m3 of GGBFS. The compressive strength and sulfate attack resistance of the cementless concrete were enhanced as the amount of added SP was increased, and the length change did not exceed 0.05% within 90 days, indicating good volume stability. SEM showed that the main hydration products were ettringite, calcium hydroxide, and tobermorite gel during the early stage of hydration, which gave the cementless concrete its early strength.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 63, 30 July 2014, Pages 189–196
نویسندگان
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