کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5437095 | 1509725 | 2017 | 19 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Transport properties of concrete after drying-wetting regimes to elucidate the effects of moisture content, hysteresis and microcracking
ترجمه فارسی عنوان
ویژگی های حمل و نقل بتن پس از رژیم های خشک کردن-مرطوب برای توضیح اثرات رطوبت، هیسترزیز و میکروکراکینگ
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی صنعتی و تولید
چکیده انگلیسی
Drying and wetting induce a number of microstructural changes that could impact transport properties and durability of concrete structures, but their significance is not well-established. This research examines pastes, mortars and concretes with different w/b ratios, binders, aggregate sizes, curing and conditioning regimes. 50 mm thick samples were dried to equilibrium at either 105 °C, 50 °C/7% RH, 21 °C/33% RH or gentle stepwise at 21 °C/93% RH â 3% RH, and then rewetted stepwise by humidification at 21 °C/33% RH â 86% RH and full saturation to produce varying degrees of damage and moisture content. Oxygen diffusivity and permeability, electrical conductivity, microcracking, accessible and total porosity were measured at different conditioning stages over 3-year period to better understand the effects of shrinkage, hysteresis and drying-induced damage on transport properties. The effect of supplementary cementitious materials (GGBS, SF) and implications of drying-wetting on concrete durability are discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cement and Concrete Research - Volume 98, August 2017, Pages 136-154
Journal: Cement and Concrete Research - Volume 98, August 2017, Pages 136-154
نویسندگان
Z. Wu, H.S. Wong, N.R. Buenfeld,