Bulk Density and Thermal Conductivity From a comparison of the results of the bulk densities and thermal conductivity coefficients of fiber-cement mortars after 28 days of hardening composites ( Figure 7 , Figure 8 , Figure 9 and Figure 10 ), it is clear that as the content of cellulose fibers in the mixture increased (C/WPF ratio decreased), the bulk density and conductivity of the mortars had a decreasing trend.
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