build building cement concrete grey industrial machine mixer stir technology tool car cutout isolated transport truck cement-mixer-truck concrete-pad concrete-pour concrete-work concreting construction fill filling flat flatten flattening form forming foundation foundational gray level leveled leveling levelled levelling mix mixed pour poured pouring preparation prepared preparing rough smooth smoothing solid solidify spread spreading strength strong sunlight surface surfaces textures tools wet work working concrete mixer drive engine farm icon pictogram sign symbol vehicle wheel builder worker brick-work bright bucket cement-mixer cement-work cementing driven driving electrical electricity empty energy engines equipment machinery maintenance mechanical mortar motor movement power powered turning yellow beware danger Ready Mix truck road safety security street traffic travel warning