Cement News tagged under: concrete
Strength predictions03 October 2018, Published under Cement NewsA prediction of strength in concrete can be made through a range of methods and with numerous variables. To facilitate this, Arthur Harrisson examines the key factors that control strength development in concrete. Figure 1: cement 28-day strengths Various methods have been developed to predict the strength that a concrete may reach with a particular combination of cement, supplementary cementitious materials (SCMs), aggregate, admixture and even water. The variables are numerous... |
Graphene may have commercial use as concrete additive14 September 2018, Published under Cement NewsZenyatta Centures Ltd's research with the University of Toronto into cement strength when using small quantities of graphene from Albany Graphite has led to some startling results. Using just 0.02 per cent of the graphene product when combined with cement saw compressive strength of cured cement paste increase by 39 per cent, reports Junior Mining Network. Professor Deman Panesar, University of Toronto Department of Civil & Mineral Engineering, said, "This encouraging preliminary result ... |
Self-healing concrete10 September 2018, Published under Cement NewsThe formation of cracks in concrete is a common occurrence and in many cases is not regarded as a major issue. However, in some circumstances they may pose a threat to a concrete structure if its purpose is to prevent the movement of water or if there is a risk of the ingress of deleterious materials. Research is underway in a number of locations to investigate ways of encouraging healing of the cracks without major intervention. Figure 1: microcracks in concrete (cracks are up to 0.0... |
The future of concrete10 October 2017, Published under Cement NewsIn the second report from the international symposium “The Future of Cement’, which took place in Paris in June, we look at recent developments in the world of concrete in terms of production methods, emissions, standards, sustainability and 3D printing. The symposium examined the use of concrete in modern-day cities In June this year, ICR partnered an international symposium looking at the research underway in the field of concrete production. The event, held at the UNESCO head... |
Lafarge Africa and COREN develop Nigeria's first concrete manual11 August 2017, Published under Cement NewsLafarge Africa Plc is set to partner Council for the Regulation of Engineering in Nigeria (COREN) in the research and development of Nigeria’s first concrete mix design manual. The concrete mix design manual provides step-by-step guidance on the selection and proportioning of concrete ingredients such as cement, sand and aggregates, and then the mixing and placing of concrete. The manual came after exhaustive research and testing with concrete materials in different parts of the country.... |
Cemex delivers concrete for Riga's Bulk Terminal18 May 2017, Published under Cement NewsCemex has supplied more than 3500m 3 of concrete to the Riga Bulk Terminal, a state-of-the-art marine terminal being built for the Freeport of Riga, Latvia’s port authority. Located in Kundzinsala, in Riga’s northern district, the terminal is a key part of a global and regional cargo supply chain and passenger traffic network in the Baltic Sea region. Cemex in Latvia supplied the concrete for the construction of the base plate, walls, and coverings for the new loading point of the Riga Bul... |
A case for low-lime cement22 February 2017, Published under Cement NewsThe cement and concrete industry is re-inventing itself through new and efficient processes to not only reverse its environmental impact, but to make improvements to the whole supply chain of the building materials industry. This sustainability drive has seen the emergence of low-clinker cements, including cements that have a reduced lime content. By Dr Vahit Atakan, Dr Sada Sahu and Dr Nick DeCristofaro, Solidia Technologies, USA. Pavers ready for curing: Solidia Concrete ® cures wi... |
CSI launches responsible sourced concrete certification18 January 2017, Published under Cement NewsInitiated by the Cement Sustainability Initiative (CSI), a project of the World Business Council for Sustainable Development (WBCSD), international partners from the concrete sector began a responsible sourcing certification system to make the concrete and cement sector more sustainable and to improve transparency. Having been available online since 1 January 2017, the CSC certification system is designed to help concrete, cement and aggregate companies obtain insight in the level to whi... |
LafargeHolcim supplied 30 concrete types to Elbphilharmonie11 January 2017, Published under Cement NewsLafargeHolcim will see the completion of new Elbphilharmonie concert facilities in Hamburg, Germany, today. The cement producer delivered some 30 different types of concrete to meet the architects’ aesthetic and technical expectations in building a concert hall with outstanding acoustics and innovative design. A total of 63,000m3 of concrete were delivered by a consortium led by the company’s German subsidiary, Holcim Deutschland. Designed by Swiss architects Herzog & de Meuron, the plans... |
Semen Indonesia27 September 2016, Published under Cement NewsAs the country tackles tight competition and oversupply, Semen Indonesia is planning to partner with precast concrete firms to boost demand. With precast concrete producers using cement as a raw material, they provide a vital additional revenue stream for Indonesia’s cement manufacturers, many of whom saw revenues decline in the first half of the year as the economy struggled to recover. An unexpected boost in sales in August by almost nine per cent will come as a welcome sign to the coun... |