Displaying items by tag: pozzolan

UK: Aggregate Industries and Coomtech have partnered to develop low-energy kinetic drying technology for pulverised fuel ash (PFA) from power plant. The partnership will see Aggregate Industries use Coomtech’s kinetic dryers in its PFA processing, as part of its effort towards increasing the volume of waste materials incorporated in its products to 3Mt/yr from 1.5Mt/yr by 2025. The project has attracted funding from the UK government Department of Business, Energy and Industrial Strategy (BEIS).

Chief commercial officer Chris Every said “We’re delighted to have the support of Aggregate Industries in this grant project. Coomtech is especially pleased to have the business’ ongoing technical and commercial input to the project operation and analysis of performance. In addition, the opportunity to work together with a brand that is leading the way in creating new materials that will prove fundamental to the future of the construction sector and meet net zero objectives.” Every continued “The added benefit of our new drying technology is its flexibility - providing the potential to dry a wide range of materials being considered to aid the greening of the cement industry, including limestone, ground blast furnace slag (GBFS), natural pozzolans and other crushed and milled minerals that can offer an activated character to combine in cement and concrete mixes.”

US: Eco Material Technologies, a producer of sustainable cementitious materials, has opened its Kirkland Pozzolan Mine in Yavapai County, Arizona. The 40-hectare site is one of the largest natural pozzolan mines in the US.
"We are excited for the opening of the Kirkland Pozzolan Mine, which will benefit not only Yavapai County but all of Arizona as well as the surrounding region," said Grant Quasha, CEO of Eco Material Technologies. "Without the support of elected officials, including Governor Doug Ducey, Senator Mark Kelly, State Senator Karen Fann and State Representative Quang Nguyen, we would not be celebrating this milestone achievement."

The event also recognised the hard work and dedication of the plant's employees, as well as Eco Material's contributions to the area including bringing wireless internet service to the surrounding community, planting new trees and generating significant tax revenue for the state.

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.”

Chile: Peru-based Unacem has bought CBB’s Cemento San Antonio grinding plant in Valparaíso region for US$30.8m. The deal also covers the nearby Popeta pozzolano deposit.

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.