  For noetherian schemes of finite dimension over a field of characteristic
exponent $p$, we study the triangulated categories of $\mathbf{Z}[1/p]$-linear
mixed motives obtained from cdh-sheaves with transfers. We prove that these
have many of the expected properties. In particular, the formalism of the six
operations holds in this context. When we restrict ourselves to regular
schemes, we also prove that these categories of motives are equivalent to the
more classical triangulated categories of mixed motives constructed in terms of
Nisnevich sheaves with transfers. Such a program is achieved by comparing these
various triangulated categories of motives with modules over motivic
Eilenberg-MacLane spectra.
