One of the summer news stories in the UK has been the drama surrounding the near-failure of dam near Whaley Bridge in Derbyshire. Concrete slabs on an overflow spillway fell away after a period of heavy rain leading to fears that the dam could fail inundating the area. Around 1500 local residents were evacuated for about a week as a precaution until the reservoir’s water level could be pumped down low enough for inspection.
No one was hurt in the incident but it has raised questions about the maintenance and renewal of infrastructure and how this fits with changing weather patterns caused by anthropogenic climate change. A sadder example of this is the collapse of the Morandi Bridge in Genoa, Italy in August 2018 that killed 43 people. This was later blamed on decaying steel rods in the structure. There have been similar debates in the US with President Donald Trump’s on-going attempts to push through a US$2tn infrastructure bill to repair the country’s structures. Although, predictably, it is floundering on the question of who is actually going to pay for it all.
In the UK, for example, cement production hit a high of over 15Mt in the late 1980s before declining to a low of 7.6Mt in 2009 and eventually climbing to above 9Mt/yr since 2015. A big cause of that decline was the 2008 financial crash and the subsequent government austerity policies. Yet, even with this taken into account, production was at around 11Mt/yr in the 2000s. How much, if any, of this production capacity gap of at least 4Mt between the late 1980s and the 2000s might be needed to maintain the country’s infrastructure? Southern Mediterranean countries like Spain and Italy offer even starker examples. Italy’s cement production fell to 19.3Mt in 2017 from nearly 40Mt in 2001. Spain’s production hit a high of around 50Mt/yr in 2007 with apparent production (local consumption and exports) falling to around 20Mt in 2018. Much of these declines are due to loss of export markets but the same basic questions remain about how much capacity will be required in the future to maintain and repair existing structures in developed nations. This could be imported but the usual constraints about moving heavy building materials around inland mean than at least some of this cement will need to manufactured locally.
The International Energy Agency (IEA) estimated in 2010 that the world would need 50Bnt of cement between 2015 and 2030. The global cement industry was already producing around 3.5Bnt/yr in 2015 according to the Global Cement Directory 2015 giving it overcapacity even then towards the estimated target. Global production capacity is just under 4Bnt/yr today. Estimates for the cost of global infrastructure requirements in this period range from US$1Tnr/yr to US$6Tnr/yr. The majority of this will go towards new infrastructure in developing countries but a minority portion will be required for maintenance. One study by the Brookings Institution and the Global Commission on the Economy and Climate estimated that developed countries would need around US$2Tn/yr for their infrastructure bills.
A study by management consultants McKinsey & Company in late 2017 reckoned that there was a worldwide US$55Tn spending gap between then and 2035 for infrastructure spending. It estimated that countries like the UK, Germany and the US needed to increase their annual spending on infrastructure as a percentage of gross domestic product (GDP) by 0.5%. Although Italy only needed to improve by 0.2%. Looking at the change in infrastructure investment rates suggests that the European Union (EU) actually started to improve its investment from 2013 to 2015 by 0.2% but that the US did not.
All of this goes to show that the show is definitely not over for building materials producers in developed countries. These industries may be mature but they should not be complacent. Roads need patching up, bridges need replacing and all sorts of other infrastructure projects are required even in places that have them already.
