Displaying items by tag: pozzolan
Ghanaian pozzolan cement plant lobbies for funding to reopen
29 September 2021Ghana: 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.
Progressive Planet and ZS2 sign letter of intent for green cement technologies collaboration
16 July 2021Canada: 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."
Siguaney Cement plant’s production exceeds 90,000t in 2020
13 January 2021Cuba: 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.”
Mbeya Cement launches new pozzolana cement product
11 November 2020Tanzania: 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.
Hazemag supplies pozzolan crushers to Northern Cement
18 September 2020Philippines: 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.
OYAK to invest in pozzolan extraction in Cape Verde
12 February 2020Cape Verde: Turkey’s OYAK is planning to invest in pozzolan extraction following a meeting between OYAK's Cement Concrete Paper Group chairman Suat Çalbiyik and prime minister Ulisses Correia e Silva. Mining activity has remained muted since Cabocem, an Italian company, closed in 2013, according to Sapo. OYAK has operations in the country via Portugal’s Cimpor, which it acquired in 2019.
Uganda: The Uganda government’s Committee on Natural Resources suspended pozzolano extraction at quarries in eastern Uganda on 14 November 2019. The Daily Monitor reported the cause of the suspension as pollution of water sources. Speaking at Tororo Cement’s Chemangal quarry, committee chair Kefa Kivanuka said that “The regulatory authorities were negligent,” and that activity at quarries was suspended until the completion of a damage assessment involving committee meetings with cement producers for the review of their pozzolano extraction licences. Besides Tororo Cement, Hima Cement, Kampala Cement and Kenya-based National Cement subsidiary Simba Cement all supply plants with pozzolano extracted in the region.