An actual typical low-income house of 42 m 2 was monitored. In this study, the potential use of modified mortars by coconut fibres as a facade coating layer to enhance thermal comfort in low-income housing structures was evaluated for the city of Cartagena de Indias, Colombia. The coconut mesocarp fibre (coir) has shown enormous potential for improving some properties of modified concretes or mortars, such as low-weight and high-acoustic isolation. CopyrightĮnhancing the thermal comfort of low-income housing in developing countries located in tropical areas is one of the main challenges for engineers and architects worldwide. A close fit between computed and experimental values derived from literature is found. A value of 2.8% absorbed water on the mass of gypsum is found, and this water plays an important role in the thermal conductivity of plasterboard at ambient temperature.įinally, the thermal conductivity of board at elevated temperature is computed. Regression analysis points out that the moisture content depends only on the gypsum content. This has an influence, especially since the composition is also related to its moisture content.
Furthermore, the influence of the composition of the boards on the thermal conductivity is investigated.
1972 44(23):1303–1308) with shape-factor C of 5 gave good agreement with experimental data of the different boards. The equation proposed by Zehner and Schlunder (Chem. The differences between different theoretical equations for both dry and moistured plasterboards are presented. Plasterboard consists of a solid phase and a water/air mix in the voids. a porous medium) can be assumed to be a three-phase system. It is shown that the thermal conductivity of gypsum plasterboard (i.e. This paper will focus on the calculation of the thermal conductivity at ambient and elevated temperatures. The thermal conductivity is more difficult to derive since it is a directional property. The first two can be calculated based on the mass composition of the board.
This property depends on the density, specific heat and thermal conductivity. The most important property governing the heat transfer is the thermal diffusion. Plasterboard often protects steel structures of buildings because it conducts heat slowly and absorbs the heat of the fire by its volumetric enthalpy.
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