کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1457175 989244 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High porosity (> 90%) cementitious foams
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
پیش نمایش صفحه اول مقاله
High porosity (> 90%) cementitious foams
چکیده انگلیسی

High porosity foams based on Portland limestone cement or gypsum plaster were prepared by a simple method of stirring and drying using low levels of the food additives: methyl cellulose and iota carageenan gum. Thermal conductivity of 0.11 W m− 1 K− 1 at 92% porosity was achieved but compressive strength was also very low. Foams were almost closed cell. Attempts to improve strength by incorporation of short staple glass fibre were only partially successful because of a change in the failure mode from progressive collapse to uniform fibre-cement debonding facilitated by the ability of the fibre network to transmit stress throughout the assembly. This approach to fire resistant insulation materials does not yet match the high strength/conductivity ratios of calcium silicate products but deserves exploring because of the simplicity of preparation and the compositional freedom for using mixtures of hydraulic cement and other powders.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cement and Concrete Research - Volume 40, Issue 2, February 2010, Pages 352–358
نویسندگان
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