CONCRETE

[:ru]Рио O.[:en]Rio, O.[:] [:ru]CISDEM, UPM-CSIC, Мадрид, Испания[:en]CISDEM, UPM-CSIC, Madrid, Spain[:]

[:ru]Родригес A.[:en]Rodríguez, A.[:] [:ru]AITEMIN, Мадрид, Испания[:en]AITEMIN, Madrid, Spain[:]

Alitinform №2 (24) 2012 г. 50-61 p.

Abstract

Several important innovations were introduced in the construction of transport infrastructures (e.g. bridges, tunnels or road and railway networks) in recent decades, mainly through mechanized equipment and concrete composition improvements. Some of these innovations lie at the foundations of the on-going success of concrete’s long-term sustainable performance. Especially need to be mentioned the improvement of the early-age performance of concrete due to the application of nanotechnology, the inherent flexibility of methods such as shotcreting as part of mechanized tunneling processes (EPBs) or the needs of new applications in long highway bridges or tunnels requiring cast-in-place HPC slabs or linings. However, all these activities genera-ted growing demands that often represent critical technical challenges to engineers. The research work presented here is aimed at better understanding the fundamentals behind the pumping process performance and helping engineers to better deal with some of the associated challenges on site.

Key words:

concrete pumping; transport infrastructure; tests to assess concrete pumpability