  We consider a five-dimensional Einstein-Chern-Simons action which is composed
of a gravitational sector and a sector of matter, where the gravitational
sector is given by a Chern-Simons gravity action instead of the
Einstein-Hilbert action, and where the matter sector is given by a perfect
fluid. The gravitational lagrangian is obtained gauging some Lie-algebras,
which in turn, were obtained by S-expansion procedure of Anti-de Sitter and de
Sitter algebras. On the cosmological plane, we discuss the field equations
resulting from the Anti-de Sitter and de Sitter frameworks and we show
analogies with four-dimensional cosmological schemes.
