Betonwerk und Fertigteil-Technik/Concrete Plant and Precast Technology | Year: 2014
Researchers at the HeidelbergCement Technology Center recently discovered that ternesite actually is a reactive clinker phase. This discovery lays the basis of a novel innovative low-carbon clinker technology. The early age strength contribution of calcium-sulfo-aluminate (CSA) cements is combined with the durability of belite cements to result in this belite-calciumsulfoaluminate-ternesite (BCf) technology. BCT cements from first semi-industrial trials showed high initial heat of hydration, good workability and volume stability of mortars, the possibility to further increase the (final) strength level and improve durability. The further optimization of B performance should lead to the potential of a widespread use in structural applications enabling the replacement of OPC based solutions.
Photocatalysis in concrete terms: Modeling and measuring for the Hohenheimer Strasse model project in Stuttgart, Germany [Photokatalyse konkret: Modeliierung und Messung im ModelLprojekt "Hohenheimer Straße" der Stadt Stuttgart]
Flassak T.,Ingenieurburo Lohmeyer |
Betonwerk und Fertigteil-Technik/Concrete Plant and Precast Technology | Year: 2013
A software tool for quantitative assessment of the effectiveness of photo-catalytically active surfaces was developed in collaboration with HeidelbergCement AG. The photocatalytic process of degradation is modeled in analogy to deposition processes. The resistance model used is based on guideline VDI 3782/5. A comparison with measured NOx data at the monitoring station was conducted to establish whether the model chosen would realistically record the concentration level in the street canyon. Simulation took place of an additional calculation to take account of the TiO2 surfaces on the roads, the parking lots, and the sidewalks. Based on calculated results presented at the Hohenheimer Strasse monitoring station, a reduction of the NOx annual average value by approximately 4% can be achieved under the assumed conditions. Annual average reductions of up to 6% are possible for the entire street canyon. Greatest reductions can be achieved near the buildings.
Tabbe M.,HeidelbergCement |
Limpinsel W.,Renaturingstation for Raptors and Owls
ZKG International | Year: 2014
Bubo bubo L. is not the name of an exotic pop group, but of one of the world's largest owls. The quarry directly adjacent to the Paderborn plant is 30 hectares in size. On two working levels, limestone-marl rock is excavated down to a depth of around 50 m. This rock was quarried as early as the Middle Ages to build churches such as the Paderborn Cathedral. Today, the rock is used as raw material for the nearby cement plant, whose product range comprises the classical Portland cements, as well as blast furnace slag cements of a wide range of strength classes. The bare rock and 'poor' soil of quarries are home to the last remnant stands of rare plants that cannot exist on the heavily fertilized agricultural terrain. In the case of the young Eagle Owl from Paderborn, an illness was initially suspected, but then it was found that a spine was sticking in its crop. Wilfried Limpinsel was able to heal the wound and rear the owl until it was fully fledged.
« Torotrak introduces new technologies to enhance V-Charge variable supercharger | Main | Study quantifies impact of fuel composition on PM emissions from gasoline direct injection engines » Joule, a pioneer in the production of liquid fuels from recycled CO , and HeidelbergCement, a German multinational building material company, are partnering to explore application of Joule’s technology to mitigate carbon emissions in cement manufacturing. Cement manufacturing is highly energy and emissions intensive, currently contributing about 6% of global CO (Zhang et al. 2014). As part of the agreement, emissions (or offtake gas) from various HeidelbergCement factories could provide Joule with the waste CO required to feed its advanced Helioculture platform that effectively recycles CO back into fuel. This initial relationship fits well with Joule’s strategy of turning waste CO into liquid fuel. A successful partnership between Joule and HeidelbergCement could over time result in the co-location of Joule’s Helioculture Technology at one or more HeidelbergCement sites around the world. Joule’s Helioculture platform applies engineered catalysts to convert waste CO directly into renewable fuels such as ethanol or hydrocarbons for diesel, jet fuel, and gasoline. The platform is flexible to utilize a variety of feedstocks, geographies, and climates. In 2014, Audi testing in a pressure chamber and optical research engine of synthetic ethanol and synthetic diesel produced in partnership with Joule showed that the fuels often performed better than their conventional counterparts. (Earlier post.) Cement. Producing one tonne of Portland cement releases approximately one tonne of CO to the atmosphere, according to the UN Environment Programme (UNEP). To produce cement, limestone and other materials are heated in a kiln at 1400°C and then ground to form clinker; clinker is then combined with gypsum to form cement. The heating of limestone releases CO directly, while the burning of fossil fuels to heat the kiln indirectly results in CO emissions. The direct emissions of cement occur through calcination—the process that occurs when limestone (calcium carbonate), is heated and breaks down into calcium oxide and CO . This process accounts for ~50% of all emissions from cement production. Indirect emissions are produced by burning fossil fuels to heat the kiln, representing about 40% of cement emissions. HeidelbergCement has been working since 1990 to decrease its carbon emissions, initiating various programs across the organization that have reduced emissions by 23% to about 600 kg CO per tonne of cement. Heidelberg has achieved this by: In May 2013, it launched the global cement industry’s first small-scale pilot project to capture CO from combustion exhaust gases at its Brevik plant in Norway. This project is mainly funded by the Norwegian government and is carried out in cooperation with the European Cement Research Academy.
News Article | January 14, 2016
HeidelbergCement and Joule Unlimited work on converting the carbon exhaust from cement manufacturing from a curse to a blessing, or from GHGs to commercial jet fuel.