Abstract: A construction block suitable for the preparation of an assemblage such as lawn edging, patio perimeters (patio containment system) and the like, wherein a plurality of the blocks are rigidly assembled into the desired configuration without the use of mortar. Each construction block is formed as a pre-cast module, preferably of concrete, within which there is a conduit said conduit being formed from an optional elongated imperforate pipe length with at least one double ended female pipe coupling, and if said pipe is present, double ended female couplings are present at the opposite ends thereof. The conduit may extend in one or more directions through the block and terminates flush with the outer walls thereof.Connection of adjacent blocks one to another to form an assemblage is carried out by connector means comprising the interposition and adhesion of male nipples within adjacent female couplings. A concrete caulk sealant may be applied between any two spaced blocks to retard growth of grass and weeds.