Innovative precast concrete components for energy-efficient building

Thermal activation inside and outside –

PTW TU Darmstadt)

→ 1 View of the model factory currently being planned and scheduled for erection in 2014. The opaque surfaces of the hybrid precast concrete elements are manufactured wet-on-wet with mineral foam for insulation and UHPC curtain panels on the roof and wall areas. The interior surface of the hybrid concrete component is, in addition, provided with capillary tube matting for thermal activation, as in the UHPC panels

PTW TU Darmstadt)

Garrecht, Hauser, Blatt)

→ 2 View of the component surface exposed to natural weathering with three different experimental set-ups:One light and one dark UHPC shell in slightly inclined position provided with capillary tube matting to analyze the effect of thermal activation (left); elevated UHPC shells for testing the tightness of the joints between two adjacent shells by means of linear TDR moisture sensors (center); hybrid concrete component with UHPC curtain shell to analyze the heat and moisture behavior of the wall construction (right)

Garrecht, Hauser, Blatt)

→ 3 Sprinkler test for analyzing environmentally-friendly heat release by means of evaporation enthalpy (left)

Temperature dissipation in UHPC elements resulting from the various color shades of the upper panel surface and cooling effect of sprinkling (right)

Ensuring a reliable, economical, and environmentally compatible energy supply is one of the greatest challenges of the 21^st century. Apart from more intensive use of regenerative energy, more efficient use of energy is likewise essential – since it results in reduction of consumption of fossil energy resources as well as of emissions of climate-damaging carbon-dioxide. Resolutions of the German Federal Government of 28 September 2010 call for a 20 % reduction until 2020 in the levels of building heat requirements as they prevailed in Germany in 2008. A further objective is lowering primary...