Displaying items by tag: alternative raw materials

Colombia: Cemex has announced the launch of the Tunjuelo Circularity Centre at its former Tunjuelo quarry near Bogotá. Having rebuilt parts of the 50m-deep quarry with demolition waste, Cemex will now work on its ecological restoration, while continuing to receive excavation waste for reconstruction of the ground. It will meanwhile divert demolition waste deliveries for recycling in aggregate production. In Bogotá, Cemex has launched an initiative for urban construction partnerships in collaboration with local authorities. It will also collect municipal solid waste (MSW) there for use in its cement production and collect its used plastic cement bags for recycling in building materials production.

Cemex’s Colombia and Peru president Alejandro Ramírez said "This is a pioneering model for Cemex in the construction materials industry globally, which we aim to position as a benchmark for circularity within the sustainable development of large cities in Colombia and the world. A piece of land that supplied materials for Bogotá's development for decades has received construction and demolition waste for its redevelopment and was transformed into a green area to the south of the city, an epicenter of the circular economy and an opportunity for urban development for the capital city of Colombia."

China: A team at Southeast University has developed an alternative concrete that contains 8% cement. It uses coral reef limestone fragments and biodebris with an upper particle size of 53mm as fine aggregate. The researchers concluded that the material proved suitable for use in precast concrete paving slab production.

India: Finland-based Betolar has launched its first concrete products manufactured using Geoprime on the Indian market. Geoprime is an additive designed for use in cement-free concrete production with ash and ground granulated blast furnace slag (GGBFS). The new concrete product range consists of precast blocks, paving slabs and tiles, and is currently on display at World of Concrete India in Mumbai, Maharashtra.

Betolar's India managing director Abhishek Bhattacharya said "We are happy to introduce our first products to our customers for the Indian markets. We have now moved from laboratory tests into the production phase, and can show concretely how well this solution works. It is great to hear the feedback from the concrete industry in the region to our sustainable solution. Decarbonisation of the concrete industry is a very current and important topic."

Argentina: ECOPact reduced-CO₂ concrete accounted for 50% of Holcim Argentina’s cement deliveries at the end of the first half of 2022, a higher share than in any other country apart from the UK. Holcim launched ECOPact concrete across its markets in June 2021. Holcim Argentina plans to execute new investments to further increase its distribution of the product.

The company’s head of concrete José Villacreses said “We have set ourselves even more challenging goals. We will be the undisputed ally for sustainable projects throughout Argentina. Whoever wants to measure their carbon footprint to offer sustainable construction will find in Holcim the necessary solution to be able to achieve the certifications that society demands today.”

Spain: CRH’s Catalonian ready-mix concrete subsidiary Beton Catalan has partnered with Grapheno Smart Materials in order to implement the latter’s graphene technology in its high-performance concrete products.

Beton Catalan’s quality director Alberto Arenillas said that the company’s high-performance concrete products require ‘a significant amount of CEM I cement,’ He said “By introducing the graphene additive, the nominal amounts of this cement can be reduced or changed to cement with a lower carbon footprint, improving its performance.” The company will sell the graphene-enriched concrete under its BeGreen reduced-CO₂ products label.

Germany: The Ministry for Economy and Climate Protection has presented HeidelbergCement with its German Climate and Environment Innovation Prize (IKU) for its ReConcrete-360° concrete recycling process. The process retrieves hardened cement paste from waste demolition concrete for use in place of limestone in clinker and cement production. The recycled material can also bind CO₂ to act as a carbon sink.

Global research and development Wolfgang Dienemann said “With ReConcrete-360°, we have succeeded in developing a limestone substitute from demolished concrete that also allows us to use the carbon-containing exhaust gases from cement production. A small revolution with a big impact: In Germany alone, the CO₂ savings potential of this process is 10Mt/yr. The IKU award underlines that we can be proud of our pioneering innovation.”

Mexico: Cemex aims for more than 50% of its sales cement and concrete to consist of Vertua reduced-CO₂ products by 2025. In the first quarter of 2022, Vertua concrete accounted for 31% of Cemex’s concrete sales, while Vertua cements accounted for 34% of its cement sales.

CEO Fernando Gonzalez said “The ultimate objective of our Future in Action programme is to provide our customers with net-zero carbon products and solutions. Our Vertua products are an important step in this direction, designed to meet society’s demand for resilient and long-lasting buildings and infrastructure built with a lower carbon footprint.”

Poland: The Building Research Institute has issued environmental product declarations (EPDs) for Cemex Poland’s Vertua Classic and Vertua Plus concrete products.

Materials director Michał Grys said “For us, product certification is another important step towards sustainable construction and a sustainable future. EPD declarations provide our clients with additional confirmation of the properties of products offered by Cemex Poland. They also improve their chances of obtaining LEED or BREEAM certificates for their investments.”