Dr Barreto’s expertise is the use of advanced laboratory techniques and the numerical modelling of soil behaviour using the Discrete Element Method (DEM). Recent work includes experimental research on (i) the behaviour of sand-rubber mixtures to improve the seismic behaviour of foundations and structures; (ii) dissolving soils which might induce settlement and/or collapse (i.e. sinkholes) as well as the numerical DEM simulation of (iii) cyclic/dynamic soil behaviour adjacent to offshore foundations; (iv) cemented soils (i.e. shales, oil sands); (v) instabilities of sands (i.e. due to flash flooding and/or earthquakes), amongst other geotechnical problems.