Global Cement News

US: A team at the University of Princeton has developed a new alternative cement using oyster shells. The team says that the oyster shells provide calcium carbonate in the form of aragonite, along with biopolymers. Together, these raise the resulting cement’s crack resistance by 19% and its ductility by 17% compared with ordinary Portland cement (OPC).

Team leader Reza Moini said “Our bio-inspired approach is not to simply mimic nature’s microstructure, but to learn from the underlying principles and use that to inform the engineering of human-made materials. One of the key mechanisms that makes a nacreous shell tough is the sliding of the tablet at the nanometer level. Here, we focus on the mechanism of tablet sliding by engineering the built-in tabulated structure of cement paste in balance with the properties of the polymer and the interface between them. In other words, we intentionally engineer defects in the brittle materials as a way to make them stronger by design.“

India: JK Cement has inaugurated its 2Mt/yr Prayagraj grinding plant in Uttar Pradesh. The Economic Times newspaper has reported that the plant raises JK Cement’s cement production capacity by 9% to 24Mt/yr.

India: Ambuja Cements and Ravi Sanghi plan to launch an offer for sale of a stake in Sanghi Industries. The Times of India newspaper has reported that Ambuja Cements will offer 2.4% of shares and Ravi Sanghi will offer 1.2%, giving a total offer of 3.6%. Following the completion of the intended sale, the companies’ combined stake in Sanghi Industries will drop to 75%, in line with shareholding rules for promoters.

US: Heidelberg Materials has successfully converted its cement plant in Speed, Indiana, into a slag grinding facility. The facility ceased Portland cement production in 2023 following the opening of a new plant in Mitchell, Indiana, and now produces slag cement using domestically sourced slag granules. The Speed site has a grinding capacity of over 400,000t/yr and also functions as a distribution hub for the Mitchell plant's cement and other products.

Italy/UK: UK-based carbon capture technology provider Nuada has launched carbon capture trials with Buzzi at its cement facility in Monselice, aiming to accelerate the decarbonisation of the cement industry. The MOF-based VPSA carbon capture plant is now fully operational, capturing 1t/day of CO₂ directly from the facility's stack.

Nuada posted on LinkedIn “Nuada's carbon capture solution is the most energy-efficient developed to date, redefining the decarbonisation landscape for hard-to-abate sectors like cement. Together with Buzzi, we are showcasing the future of carbon capture in the cement industry.”