This week's news that Boral's operations have been disrupted by the Construction, Forestry, Mining and Energy Union (CFMEU) in the Australian state of Victoria highlights an increasingly difficult situation for the company and the Australian cement industry in general.

Boral's worksite at Footscray, near Melbourne, was allegedly blockaded by the CFMEU last week over the union's separate and long-running dispute with site contractor Grocon. The CFMEU wants Boral to stop supplying Grocon sites. Boral says that it has been forced to address the issue at Footscray and two other sites by issuing injunctions against the union. After its first half results announcement last week, which showed a loss of US$192m for the year ending 30 June 2013, this is clearly the last thing that Boral needs to be dealing with.

So far, 2013 has seen mainly trouble for Boral. In January it announced that it would shed 1000 jobs across its global operations, including 885 in its native Australia. In February it announced that the company made a US$25m loss in the half year to 31 December 2012. In March, it restructured by merging production divisions to save additional cash. It also had to suspend production at its Waurn Ponds plant. However, revenues have been rising. Boral is not Titan.

Elsewhere in Australia, Adelaide Brighton announced that its first half 2013 profit fell by 9% year-on-year. It expects no improvement over 2012 in the rest of the year.

With the onset of the carbon tax, cement manufacturing is increasingly expensive in Australia, a fact that is especially difficult when combined with lower demand. China, Indonesia and Vietnam all produce similar quality cement 'nearby' at considerably lower cost, making the long-term future of cement manufacturing in Australia look fragile. Indeed, this is a trend that Australia shares with its antipodean neighbour. In New Zealand, after years of indecision, Holcim recently decided to not build a new cement plant at Weston. A new import terminal is its new preferred strategy. Could Australia, a country with such vast reserves of fuels and minerals, also be gradually heading towards cement import dependency?