Materialchef This week we look at a strong and solid material, concrete. Looking at the foundations of this this scientific delicacy we will explain what concrete is, how it works and what properties the material has that make it so ubiquitous in our buildings and transport infrastructure. Guest: Dave Costen, Milbank Concrete Products Music: Dan-O, at http://danosongs.com. Filming: Alex Parkyn-Smith. Copyright the Naked Scientists. Image: Aali R. Alizadeh