کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4912781 | 1428754 | 2017 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Definition of optimal parameters for supercritical carbonation treatment of vegetable fiber-cement composites at a very early age
ترجمه فارسی عنوان
تعریف پارامترهای بهینه برای درمان کربناته فوق بحرانی کامپوزیت های فیبر سیمان گیاهی در یک سنین بسیار زیاد
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کلمات کلیدی
ماتریس سیمانی فرایند خرد کردن، پالپ خالص نشده پالم سفید رفتار مکانیکی، ریز ساختار،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی عمران و سازه
چکیده انگلیسی
This paper presents a study of cellulose pulp fiber-cement composites subjected to supercritical carbonation at a very early age. The raw materials used for the creation of cementitious composite mixes include: Portland cement, limestone filler, and cellulose pulp. Composites were produced by a slurry vacuum dewatering process and subjected to curing conditions which studied the effect of supercritical carbonation concentration (0% and close to 100% of CO2), the effect of cellulosic pulp (unbleached or bleached), and durability. All samples were subjected to mechanical, physical, and microstructural tests. The initial period of thermal curing (varying from 24Â h to 48Â h) and exposure time to carbonation (from 1Â h to 2Â h), did not have a statistically significant effect on the mechanical performance of the composites. However, the flexural test results of carbonated composites reinforced with bleached pulp showed a statistically significant improvement when compared to unbleached pulp reinforcement (24% increased average modulus of rupture). Thus, for cementitious composites cured with supercritical carbonation, the use of bleached cellulosic pulp, 24Â h of thermal hydration and 1Â h in an environmental chamber provided the optimal curing conditions and the most desirable properties in this study.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 152, 15 October 2017, Pages 424-433
Journal: Construction and Building Materials - Volume 152, 15 October 2017, Pages 424-433
نویسندگان
Gloria Esther Urrea-Ceferino, Nolan Rempe, Valdemir dos Santos, Holmer Savastano Junior,