Fly ash and pozzolanas
Pumice rock
A pozzolana is a material which, when mixed with a hydraulic cement, will react with the lime from the cement and water to produce cementitious hydration products of its own. The most familiar types of pozzolanic materials in common use are low-limed fly ash and silica fume, which are the residues from other industrial processes. Other artificial materials that are utilised for their pozzolanic properties include rice husk ash, burnt shales and burnt or calcined clays.
Some of the earliest-used pozzolanas were natural materials found in the region around Mount Vesuvius, a volcano in southern Italy with a notoriety for destruction. Volcanic rocks still provide a source of reactive materials that can replace Portland cement clinker with beneficial effects on concrete quality, in terms of durability and also by minimising the CO
Canadaâs low-carbon transition
Published 14 January 2021
While the coronavirus pandemic has impacted cement demand in Canada, the country’s cement industry continues to work towards a low-carbon cement sector. ICR speaks with Adam Auer, environment and sustainability vice president of the Cement Association of Canada, about the industry’s drive towards decarbonisation.
Adam Auer, Cement Association of Canada, highlights the steps taken
by the industry towards a low-carbon cement sector
Canada’s cement market started 2020 with strong demand. However, by March COVID-19-related restrictions and economic impacts began to drive down cement consumption. Demand recovered throughout the summer, pointing to a YoY decline in 2020 when compared with 2019.
Tripling the lifetime of lining
Published 11 January 2021
A Vietnamese cement plant has more than tripled the lifetime of the refractory lining in its cooler bull nose by using a precast modular lining from HASLE Refractories. Abrasion and alkali attacks have been reduced significantly, while the solution is also extremely resistant to coating. By HASLE Refractories A/S, Denmark.
Figure 1: completed installation of HASLE precast Modular Lining in the cooler bull nose at a cement plant in Vietnam
A 5000tpd cement plant in Vietnam, running on 70 per cent coal and 30 per cent AFR, was having problems with short refractory life in its cooler bull nose. With a lifetime of no more than 8-12 months, the cement plant had to reline its cooler bull nose after each campaign. Relining the area not only required many manhours and materials but also took up valuable production time. To minimise downtime, the cement factory was looking for a longer-lasting refractory solution for its cooler bul
DG Khanâs continuous drive
Published 22 December 2020
DG Khan Cement Co Ltd is one of Pakistan’s largest producers with a total capacity of 6.72Mta. Having launched a new integrated line in 2018, the company continues investing in its domestic manufacturing base to improve energy efficiency and reduce power consumption and production costs. By Shahid Ghazanfar (Hub Plant) and Muhammad Shafiq (DGK 1 Plant), DG Khan Cement Co Ltd, Pakistan.
DG Khan’s 9000tpd Hub cement plant is the most recent addition to the company’s domestic production base
D G Khan Cement Co Ltd (DGKCC) is a public limited company listed on the Pakistan Stock Exchange. Its main shareholder is the multinational conglomerate, Nishat Group.
Shchurovsky Cement celebrates 150 years
Published 15 December 2020
Part of LafargeHolcim Russia, this year Shchurovsky Cement’s plant in Kolomna is celebrating 150 years of cement production. Over its long history the integrated works has invested in continuous improvements to enhance efficiency, capacity and environmental peformance, and to help build modern Russia. By LafargeHolcim Russia, Russia.
Shchurovsky Cement has come a long way
since its early production of around 1424tpa
of cement and today has a capacity of over 2Mta
In 1870 German entrepreneur Emile Liphart founded one of Russia’s first Portland cement plants in the village of Shchurovo, near Kolomna. Mr Liphart chose this particular site as it was rich in limestone, sand and gravel deposits, as well as being strategically located close to the Moscow-Ryazan railway.