Global Cement News

US: A team from the Massachusetts Institute of Technology (MIT) has developed a new method to sequester CO₂ in concrete before curing it. The method is based on the addition of bicarbonate of soda, which reacts with cement to produce a calcium carbonate-calcium silicone hydrate composite. The Journal of Engineering has reported that the method adds the benefits of CO₂ mineralisation during production and casting, doubling the mechanical performance of early-stage concrete. It also eliminates the effects of carbonation reactions in cured concrete, which weaken the concrete by lowering its alkalinity, which accelerates the corrosion of rebar. The method has the potential to sequester 15% of CO₂ emissions from cement production.

The team said “The pre-curing capacity of concrete to sequester CO₂ has been largely underestimated and underutilised. Our new discovery could further be combined with other recent innovations in the development of lower carbon footprint concrete admixtures to provide much greener, and even carbon-negative, construction materials.”

China: China Resources Cement has forecast a loss of US$4.46 – 5.73m during the first quarter of 2023, which ended on 31 March 2023. Dow Jones Institutional News has reported that the group attributed the anticipated scale of the loss to a year-on-year decline in its cement prices.

India: UltraTech Cement says that it has made a second deployment of GreenLine liquefied natural gas (LNG)-powered cement trucks in its cement operations. Indo-Asian News Service has reported that the new trucks will operate from UltraTech Cement’s Pune cement terminal in Maharashtra. GreenLine says that its LNG trucks have 28% lower CO₂ emissions than ordinary cement trucks, equating to reductions of 24t/yr per truck for UltraTech Cement.

The cement producer’s associate vice president Tanmay Pradhan said “We are dedicated to creating a sustainable future, and we are fully committed to collaborating with our partners and stakeholders to achieve our goal of a cleaner environment. Our association with GreenLine is a step forward in our ongoing efforts to decrease emissions, enhance energy efficiency, and promote sustainability."

India: The government has published plans for a new broad-gauge double railway line in Rajasthan. The planned line will connect Jaipur and Sawai Madhopur, and will facilitate the transport of coal to businesses including cement plants. Maritime Gateway News has reported that the new line will increase carrying capacity in the local railway maintenance block by 80%. It is scheduled for commissioning in the 2027 financial year.

New Zealand: Cement producer and construction firm Fletcher Building has reported a 20% year-on-year drop in domestic housing demand during the first quarter of 2023. The Australian newspaper has reported that the company attributed the decline to ‘soaring’ interest rates in the country. It now expects to sell 800 residential units in 2023, 20% below its previous expectation of 1000 units. Fletcher Building said that building materials costs rose by 5 – 10% between 2020 and 2022, due to ‘higher input and commodity costs’ in production.

CEO Ross Taylor said that Fletcher Building faces labour shortages in its civil construction business, but maintained a strong order pipeline. Taylor said “It won’t drive an uptick in volumes but it will underpin the volumes in the next three to four years.”