Explanation Given: Density of concrete is ρ c = 2300 kg / m 3 Thermal conductivity of concrete is k c = 1.4 W / m ⋅ K Specific heat of concrete ( C p ) c = 880 J / kg ⋅ K Density of air ρ a = 1.614 kg / m 3 Thermal conductivity of air k a = 26.3 × 10 − 3 W / m ⋅ K Specific heat of air ( C p ) a = 1.007 J / kg ⋅ K Formula Used: The expression of density of mixture is given by, ρ = ρ c V c V + ρ a V a V The expression of specific heat of mixture is given by, C p = ( C p ) a × ( C p ) c ( C p ) a + ( C p ) c The expression of thermal conductivity of mixture is given by, K eff = [ k a + 2 K c − 2 ε ( k c − k a ) k a + 2 K c + ε ( k c − k a ) ] × k c Calculation: The density of mixture is calculated as, ρ = ρ c V c V + ρ a V a V = ( 2300 kg / m 3 ) 0.65 + ( 1.614 kg / m 3 ) 0.35 = 1495.4 kg / m 3 The specific heat of mixture is given by, C p = ( C p ) a × ( C p ) c ( C p ) a + ( C p ) c = ( 1

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ISBN: 9780470501962

Author: Frank P. Incropera, David P. DeWitt, Theodore L. Bergman, Adrienne S. Lavine

Publisher: Wiley, John & Sons, Incorporated

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Processing of Polymer Matrix Composites

The polymer matrix composite is described as a composite material that contains some polymer in the form of either fibers or powder. Polymer matrix composites are also known in short as PMC's.

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Chapter 3, Problem 3.37P

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The density, specific heat and thermal conductivity of the mixture.

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