immo!nvest – Die Plattform für Standorte und Immobilien

Tag: Beton

  • Matériaux Sabag prints concrete elements

    Matériaux Sabag prints concrete elements

    Matériaux Sabag is expanding its offer with a 3D printing solution for concrete elements. The company, based in Delémont, has been using a robot since the end of September that enables 3D printing using the concrete spraying process. The concrete elements can thus be tailor-made in the prefabrication. The solution allows the use of raw materials from local production, writes the company in a press release . In addition, CO2 emissions can be reduced by 30 percent. “In this way we will be able to accept urgent orders and react flexibly to customer requests so that we can meet the requirements of the construction sites,” Cédric Theubet, Operations Manager at Matériaux Sabag, is quoted in the press release.

    The Jura specialist for building materials is the first company in Switzerland to use this Mobbot solution. The start-up from Freiburg i.Ue. develops robot platforms for 3D concrete printing. His 3D printing of concrete parts means that cladding can be dispensed with and less manual work is required. Mobbot was founded in 2018 by Agnès Petit and today has eleven employees.

  • Holcim supplies sustainable concrete for HSG Learning Center

    Holcim supplies sustainable concrete for HSG Learning Center

    The HSG Foundation is currently building the new HSG Learning Center on the premises of the University of St.Gallen ( HSG ). The general contractor HRS Real Estate AG has commissioned the Swiss Holcim AG with the delivery of the concretes. A new, more sustainable Holcim product, EvopactPLUS, is used in around half of the total of 6,000 cubic meters of concrete used.

    "With EvopactPLUS we close the building material cycle, conserve natural resources and save CO2," said Roger Dällenbach, Regional Manager for German-speaking Switzerland and Ticino, in a press release from Holcim. The new type of concrete replaces natural gravel with a reclaimed aggregate from the region. It also includes Susteno, which, according to the company, is the "first and only resource-saving cement in Europe that uses mixed granulate from demolitions as an additive". This fine material is not used in conventional concrete production and must therefore be dumped.

    "Compared to an already optimized mass cement, the use of Susteno saves 10 percent CO2," the press release said. Regionality also plays a role: the building material is delivered from the Holcim concrete plant in St.Gallen, just three kilometers from the construction site. "It was an experiment for us because we were working with the product for the first time," Holcim foreman Marcel Kunz is quoted as saying. He is very satisfied with it, "it's a wonderful concrete."

    In the future, the modern building should focus less on technical learning than on learning the necessary skills such as critical thinking and self-reflection, according to the client, the HSG Foundation . It finances this project largely from donations from HSG alumni .

  • ETH spin-off binds CO2 in broken concrete

    ETH spin-off binds CO2 in broken concrete

    If the concrete industry were a country, it would be the third largest emitter in the world. It produces around four times as much CO2 as all global air traffic. The start-up Neustark , a spin-off from the Swiss Federal Institute of Technology in Zurich ( ETH ), is countering this with its concept: the mineralization of carbon dioxide from the air to obtain limestone.

    Neustark binds CO2 in the pores and on the surface of concrete granulate. This upgraded granulate can then be mixed in fresh concrete as a substitute for sand and gravel. Thanks to these granules, less cement is required while the properties remain the same. This emerges from a communication from the ETH.

    “What appealed to me was that the solution would not be available for five or ten years, but already now,” says business economist Valentin Gutknecht, who is responsible for the operational aspects of the business in the ever-growing Neustark team. Together with Johannes Tiefenthaler, he wants to turn this climate-positive business idea into reality. Tiefenthaler is doing his doctorate at the Department of Mechanical and Process Engineering ( MAVT ) on the next generation of technology for the mineralization of carbon dioxide.

    There is a lot of research going on in the construction sector, but so far the industry has only achieved small reductions in emissions, so Tiefenthaler. The advantage of the concrete granulate is that it is highly reactive and the broken concrete forms a very stable chemical compound even without climate-damaging pre-treatment with carbon dioxide.

    Your pilot plant for recycling concrete is funded by the Federal Office for the Environment ( FOEN ) and the Swiss Climate Foundation. The project is now intended to demonstrate the added value along the entire value chain. Neustark's goal: negative emissions for which there are only "very few technical approaches". The start-up wants to show "that negative emissions can not only bring costs but even economic benefits".