Thermal Conductivity Of Concrete Floor Slab

Thermal mass effect thermal mass is a property that enables precast concrete floors to absorb store and later release significant amounts of heat.

Thermal conductivity of concrete floor slab.

The thermal analysis of concrete members according to en 1992 1 2 shows errors. It is a readymixed concrete solution offering improved thermal conductivity performance actual range λ 0 45 to 0 54 w m k with assured structural performance 30 n mm2. A nonlinear optimization method is applied to improve the thermal conductivity. Thermal mass effect thermal mass is a property that enables precast concrete floors to absorb store and later release significant amounts of heat.

Generally speaking lower density concrete provides better insulation than higher density concrete. A reasonable r value for a normal concrete slab can be estimated using an r value the thermal resistance per inch of thickness between 0 1 and 0 2 and multiplying it times the slab thickness. From this the thermal transmittance u value w m 2 k of a building element is calculated as the inverse of the sum of the r values of the component parts and adjacent air layers. Low conductivity and structural concrete low thermally conductive concrete is proven to improve energy performance in buildings.

The thermal resistance or r value m 2 k w is calculated by dividing the thickness of the material in metres by the k value. Thermal conductivity of building materials thermal conductivity of building materials acoustic plasterboard aerated concrete slab 500kg m3 aluminium asphalt 1700kg m3 bitumen impregnated fibreboard brickwork outer leaf 1700kg m3 brickwork inner leaf 1700kg m3 dense aggregate concrete block 1800 kg m3 exposed. Improvements of the involved physical parameters are indicated. A sensitivity analysis is performed to identify the governing parameters.

The picture above shows a concrete floor we re about to pour with radiant heating tubes installed. The thermal performance of standard o reilly hol lowcore floor slabs is 25 better in average com paring to the same slabs with open voids. Thermal conductivity of a concrete slab indicates the rate of heat transfer through the solid mass by conduction usually in regard to heat transfer to or from the ground. The coefficient of thermal conductivity k is proportional to density of the concrete among other factors.

Initial test results have shown that. The thermal performance of standard o reilly hollowcore floor slabs is 25 better in average com paring to the same slabs with open voids. Core slabs reduces their thermal performance.