Displaying items by tag: pozzolan

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.