کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
256487 503553 2016 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Durability of concrete made by partial replacement of fine aggregate by colemanite and barite and cement by ashes of corn stalk, wheat straw and sunflower stalk ashes
ترجمه فارسی عنوان
استحکام بتن ساخته شده با جایگزینی جزئی دانه های خرد شده توسط کلمنیت و باریت و سیمان توسط خاکستر ساقه ذرت، کاه گندم و خاکسترهای ساقه ی آفتابگردان
کلمات کلیدی
خاکستر ساقه ذرت، خاکستر کاه گندم، خاکستر ساقه ی آفتابگردان، کلمنیت، باریت
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی


• Durability of concretes made of corn stalk, wheat straw and sunflower stalk ash with barite, colemanite are investigated.
• This ashes can improved many durability properties of concrete.
• Colemanite and barite and these ashes can be used with concrete production.
• Wheat straw, corn stalk and sunflower stalk ash with barite can be used for radiation attack.
• Mineral admixtures generally made a positive contribution against freeze–thaw.

In this study, the durability properties of concretes involving corn stalk, wheat straw and sunflower stalk ash along with barite and colemanite are investigated. Corn stalk, wheat straw and sunflower stalk ash are substituted in place of cement, while barite and colemanite are substituted in place of fine aggregate with different percentages. Concrete specimens were tested for compressive strength at 7, 28 and 180 days. Furthermore, abrasion and freeze–thaw tests were performed to investigate the physical and mechanical properties. 180 day sulfate resistance tests were applied in 5% sodium sulfate solution (Na2SO4) for investigating the chemical effect on concrete. Moreover, 12 × 12 × 2 cm mortar samples were produced to apply radiation shielding test. Am-241 gamma ray source was used for the radiation shielding test. The present study showed that the use of the abovementioned ashes improves many engineering properties of concrete. By filling the voids, the ashes produce a stronger concrete, which is further enhanced by colemanite and barite. Additionally, the described additives improve the radiation shielding property of concrete.

The images of the wheat stalk and its ash, corn stalk and its ash, sunflower stalk and its ash.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 106, 1 March 2016, Pages 253–263
نویسندگان
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