کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6750070 | 1430633 | 2018 | 46 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Use of a plant based polymeric material as a low cost chemical admixture in cement mortar and concrete preparations
ترجمه فارسی عنوان
استفاده از مواد پلیمری مبتنی بر بوته به عنوان یک افزودنی شیمیایی کم هزینه در ملات سیمان و آماده سازی بتن
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
افزودنی های بیولوژیک، بتنی با کارآیی بالا، ظرفیت افزایش ویسکوزیته، ظرفیت نگهداری آب، هیدراتاسیون سیمان، طول عمر
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی عمران و سازه
چکیده انگلیسی
Aqueous extract of okra called here as bio-admixture was characterized and tested for using as a sustainable chemical admixture in the production of cement mortar and concrete. Several fresh and hardened states properties of cement mortars and concrete with and without the presence of bio-admixture were evaluated. Interactions of bio-admixture with cement particles during hydrations were also investigated by using conductometric and FTIR spectroscopic methods. Moreover, an improved method was developed to determine water retention capacity of cement pastes. Results indicate that the investigated bio-admixture exhibits viscosity enhancing property. In comparison to the reference cement paste, bio-admixture containing cement pastes have shorter setting times due to increasing hydration rate of cement particles. Solution chemistry and FTIR spectroscopic investigation indicate that the addition of bio-admixture enhances cement hydration rate. Increase hydration rate can be related with the interactions of pectin type heteropolysaccharides present in bio-admixture with Ca2+ ions of cement paste. Compressive strengths of bio-admixture containing mortar and concrete are higher than that of the reference specimens at the investigated curing period. Deterioration of strength of bio-admixture based mortars cured in MgSO4-NaCl solution is distinctly less in comparison to reference, depicting higher durability under such conditions. Most of the properties of cement mortar and concrete are also dependent on the concentrations of bio-admixture in aqueous solution. Therefore, investigated bio-admixture can be considered as a low-cost, environmentally benign viscosity enhancing admixture for producing sustainable cement composites having improved mechanical and durability properties.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Building Engineering - Volume 15, January 2018, Pages 194-202
Journal: Journal of Building Engineering - Volume 15, January 2018, Pages 194-202
نویسندگان
Amrita Hazarika, Indranuj Hazarika, Mumee Gogoi, Shilpi Shaya Bora, Rashmi Rekha Borah, Prasanta Jyoti Goutam, Nabajyoti Saikia,