Displaying items by tag: concrete

Japan: Researchers from the University of Tokyo have developed a new method for producing cement-free concrete from sand. The method reacts sand with alcohol in the presence of a catalyst, according to ChemEurope. When dehydrated, this produces tetraalkoxysilate. The research team then reintroduced water, and thus allowed the reactants to move back and forth between tetraalkoxysilate and sand. In this way, the sand particles progressively bonded together. The resulting concrete is reportedly more resilient to chemical, temperature and humidity changes than concrete produced from Ordinary Portland Cement (OPC).

In the report of the findings, researcher Ahmad Farahani wrote that various sources of sand tested suitable for use, including silica sand, glass beads and simulated moon sand. This gives the method the advantage that it is non-specific to raw materials or locations, and can be integrated into waste management.

US/Canada: XPrize has named CarbonBuilt and CarbonCure Technologies as the winners of carbon capture and storage (CCS) design prizes worth US$20.0m. The competition ran at two power plants in Wyoming, US and Alberta, Canada. CarbonBuilt won the contest at the Wyoming plant with a concrete-curing based system. The concrete produced has a lower carbon footprint than conventionally produced concrete, according to XPrize. CarbonCure Technologies won the Alberta contest with a design based on carbonating the water used in washing cement trucks. This reportedly formed a concrete-strengthening slurry.

XPrize has partnered with Elon Musk and the Musk Foundation to launch a second round of CCS design prizes worth a total US$100m.

Qatar: Switzerland-based Sika has expanded concrete admixture production capacity at it Doha admixture plant. The company has also announced the start of epoxy resin production in the country. It says that its present investments target growth to serve the expanding regional construction market. Numerous major projects and the expansion of energy and utilities infrastructure have driven a growing demand. Qatar’s state sourcing policy further increases consumption of building materials produced in the country.

Europe, Middle East and Africa regional manager Ivo Schädler said "Our latest investment in Qatar positions us for continued growth and strengthens our competitiveness in the country. In expanding our production, we are anticipating a substantial increase in demand and volumes for our high-value adhesives and flooring solutions. Our building sector customers will benefit from an expanded and locally produced portfolio of Sika solutions which, in addition, eliminates long-distance transportation."

Germany: Italy-based Buzzi Unicem subsidiary Dyckerhoff has received Concrete Sustainability Council (CSC) Gold certification for all seven of its German cement plants. All 10 of its concrete plants also received Gold certification. The company’s seven cement plants previously received Silver certification from the CSC in 2018. It said that it was especially pleased with its latest achievement giving the more rigorous checks under the certification body’s updated 2.1 version.

Philippines: Holcim Philippines, part of Switzerland-based LafargeHolcim, has announced the launch of its new Holcim Aqua X concrete. The product contains ‘active water-repellent boosters’ giving it increased resistance to water damage.

The BusinessWorld newspaper has reported that president and chief executive officer Horia-Ciprian Adrian said that Aqua X ‘highlights our great advantage in developing exciting products.’ He added that the product outperforms other concretes on environmental indicators due to its low clinker factor.

Switzerland: The Solar Impulse Foundation has certified 10 LafargeHolcim products with its ‘Efficient Solutions’ label. The label designates products which protect the environment in a profitable way. The following LafargeHolcim products now bear the label: 14Trees 3D concrete printing technology; Aggneo recycled aggregate; Airium insulating foam; Bio-Active Concrete for coastal ecosystem rehabilitation; Ductal ultra-lightweight concrete; Durabric earth-based block; ECOPact green concrete; TerraFlow low-carbon cement; Kawach water-repellent cement; and the ORIS digital road design platform.

Chief executive officer Jan Jenisch said “I’m very proud of our strong contribution to the Solar Impulse Foundation’s goal of finding 1000 environmentally positive solutions. With more than half of our research and development efforts focused on sustainable building solutions, we are committed to enabling a net-zero future that works for people and the planet. Today’s endorsement of our clean technologies is a great encouragement for our teams to keep on pushing the boundaries of innovation for sustainable building.”

China: Huaxin Cement has forecast consolidated net profit growth of 104% - 111% year-on-year to US$55.7m – US$59.6m in the first quarter of 2021 from US$53.7m in the same period in 2020. The group said that cement volumes rose by 60% and concrete and aggregate volumes grew by over 200%. The cement producer has attributed the growth to the impact of coronavirus upon its business at the start of 2020.

US: Cemex USA, part of Mexico-based Cemex, has won a contract to supply 90,700t of cement and 153,000m³ of concrete for the latest phase of construction of the Houston Grand Parkway. The cement and concrete will help build the road’s I-1 and I-2 sections. The ring road around Houston is the longest of its kind in the US. Cemex USA will provide a portable central mix plant for the project.

Texas regional president Scott Ducoff said “Cemex USA is proud to be part of an iconic infrastructure project in our headquarters city of Houston, and one that will help ease traffic and improve local travel for commuters.” He added “Completing the Grand Parkway is a significant endeavour and opportunity for us to continue to innovate how we efficiently and effectively deliver our best-in-class materials to meet the demands of inspiring projects such as this one.”

China: CNBM’s revenue rose by 0.5% year-on-year to US$38.9bn in 2020 from US$38.7bn in 2019. Its profit for the year grew by 17% to US$3.30bn from US$2.81bn. However, its cement sales revenue fell by 3% to US$19.5bn from US$20.0bn and its concrete sales fell slightly to US$7.80bn. Cement-based earnings before interest, taxation, depreciation and amortisation (EBITDA) fell slightly to US$5.73bn and concrete-based EBITDA rose by 53% to US$794m. Both cement and concrete sales volumes grew slightly to 340Mt and 112Mm³ respectively. Overall group revenue rose due to sales by the group’s new materials and engineering divisions. The share of its overseas revenue fell to 2% in 2020 from 13% in 2019 due to declines in most regions with the exception of the Americas and Oceania.

“2020 was an extraordinary year, faced with severe and complicated domestic and international environment, especially the serious impact from Covid-19,” said Cao Jianglin, chairman of CNBM. He added, “The foundation of economic recovery in China is not yet solid, and the task of industry transformation and upgrading is arduous.” The company plans to continue implementing supply side structural supply reforms and work towards government CO₂ emission peak targets and carbon neutrality plans.

Egypt: Developer Mountain View has awarded a 300,000m³ concrete supply contract to Lafarge Egypt, part of Switzerland-based LafargeHolcim. Mountain View will use the concrete to build its Mountain View iCity in East Cairo. The investment in the project totals US$12.7m.

The producer has also signed a memorandum of understanding with the Egyptian National Research Centre to undertake initiatives aimed at enhancing construction.