Displaying items by tag: pozzolan

Saudi Arabia: Al Kifah Ready-Mix & Blocks (KRB) has announced the upcoming launch of its ConGreen reduced-CO₂ concrete products range at the Big 5 Saudi construction summit on 28 – 31 March 2022. ConGreen concretes replace clinker with lower-carbon materials such as pozzolan and use Canada-based Carbon Cure Technologies’ embedded recycled CO₂ technology to reduce its carbon footprint by up to 30% compared to conventional ordinary Portland cement (OPC) concretes. In addition to this, KRB says that ConGreen concretes also provide improved workability and pumpability properties, as well as being highly durable, with high passing and finishability. They have very low rapid chloride permeability (RCP), water absorption and water permeability properties and low heat of hydration.

General Manager Nigel Harries said “We are committed to driving energy efficiency and addressing the global emission challenges. We aim to help build a better community and environment-friendly facilities by producing high-quality concrete, such as ConGreen, that has a reduced environmental impact and is characterised by its high performance, durability and sustainability, with a low carbon footprint as compared with standard concrete.”

Ghana: Daniel Asenso-Gyembibi, the director of the Building and Road Research Institute of the Council for Scientific and Industrial Research (CSIR-BRRI), has told parliamentarians that the institute’s Pozzolana cement plant needs US$4m to reopen. The unit at Gomoa Mprumem in the Central Region was forced to close due to a lack of private investment, according to the Ghanaian Times newspaper. Asenso-Gyembibi said that CSIR-BRRI had spent around US$250,000m on the project.

Commercial production started at the plant in 2011 with a capacity of around 5000bags/day. However, the unit stopped operation later in the same year due to poor sales and a lack of investment.

US: Pozzolan cement producer Green Cement has appointed Grant Quasha as its chief executive officer (CEO). He succeeds John T Preston, who will remain as chairman of the board. Quasha will be based in Texas, where the company has its headquarters and existing production facilities. He will also be joining the company's board of directors.

Quasha previously worked as the regional chief investment officer of GFG Alliance. Before this he was the CEO and managing director of Paringa Resources, a mining company, and the chief commercial officer of Wolverine Fuels, a producer of bituminous coal. He also worked as the North American Manager of Corporate and Structured Finance at Trafigura AG, as an investment banker in JPMorgan's New York mining and metals division and has worked on the board of directors of the National Mining Association. Quasha holds a Bachelor of Arts degree from Harvard College and a Master of Business Administration (MBA) from Harvard Business School.

Green Cement produces cements made using pozzolonic materials including its PozzoSlag product. It sold over 2Mt of cement in 2020.

Canada: Progressive Planet and sustainable construction company ZS2 have signed a letter of intent to collaborate on green cement technologies development. The pozzolan-based cement producer will supply ZS2 with 10,000t/yr of natural pozzolan, beginning in late 2021. It will also purchase US$300,000-worth of shares in ZS2. The companies will also explore sequestering CO₂ in magnesium-based cements.

ZS2 chief executive officer Scott Jenkins said "The technical collaboration between PLAN and ZS2 continues to grow. The potential to reduce the carbon footprint of innovative cement products is significant with the combination of our mutual research and commercialisation to date. ZS2's growing portfolio of high performance, fire-resistant and sustainable building technologies will be greatly enhanced by our expanding partnership, and we are extremely excited about our shared future potential."

Cuba: Corporacion Cementos Cubanos’ Siguaney plant produced over 90,000t in 2020. Centrovision News has reported that the plant produced 87,000t of grey cement and 3000t of white. It had planned to produce 10,000t of white cement, but still exceeded its cement target overall. Cost per tonne of cement was also lower than planned.

The company said that grinding operations were disrupted when the Cienfuegos cement plant delivered less clinker than expected. As a result, the Siguaney plant’s kiln produced 18,000t of additional clinker. It achieved this through the use of refractory bricks from another kiln. Disruptions to imports also caused the company to hire Cuban Lubicrants Company (Cubalub) to provide lubricants for the plant’s compressors.

The producer said that it foresees no increase in cement production in 2021. It will launch two new pozzolanic cements, PP-35 and PZ-25.

General manager Gonzalo Reina said "PP-35 and PZ-25 have similar benefits to other cements, but their constitution saves clinker, a raw material that generates the greatest cost and constitutes the greatest difficulty in maintaining stable production.”

Tanzania: Mbeya Cement, part of LafargeHolcim Tanzania, has launched Lafarge Tembo Pozzi, a pozzolana-based cement product. It is intended to replace imports of fly ash, according to the Daily News newspaper. At present the country imports 40,000t/yr of fly ash for the construction industry.

Philippines: Germany-based Hazemag says that it has supplied two HRC 1230 roller crushers to Northern Cement’s 2.0Mt/yr Bulacan, Quezon cement plant. The supplier says that each crusher has a capacity of 800t/hr and will grind pozzolan, shale and silica in the plant’s additive crushing and handling line.

US: Solidia Technologies has filed a patent for a new hydraulic cement consisting of Ordinary Portland Cement (OPC) and other supplementary cementitious materials (SCM) including lime, alkali hydroxides, clay minerals and over 10% synthetic pozzolan.

Solidia Technologies said, “In order to reduce global CO₂ emissions it is necessary to adopt new approaches to create a new generation of hydraulic cements. The most efficient cement kiln can produce OPC clinker with an associated emission of 816 kg of CO₂/t. Blending the ground cement clinker with SCM, which have low or zero associated production CO2 emissions, reduces the total embodied CO₂ of the final product. Using a cement with the lowest possible clinker factor for a given application is the most common industry approach to reducing the CO₂ footprint of concrete.”

Canada: Progressive Planet, a company developing pozzolan-based cementitious products, has appointed Doug Brown as a Scientific Advisor with immediate effect. Brown is a materials scientist who holds a PhD in chemistry from the University of Calgary. He has worked with the team that founded Carbon Engineering, a Canadian company that is developing industrial-scale technology to remove CO₂ directly from the atmosphere. He has also worked in the private sector in the field of green building technologies and he is a board member of the Alberta Chapter of the Canadian Green Building Council.