Mortar-less interlocking building block system

In a mortarless building wall assembly of interlocking wall block members, the combination comprising, a first plurality of standard building blocks, each of which has body portion in the shape of an elongated rectangular prism, each standard building block being integrally formed with a protrusion extending longitudinally and centrally along one side thereof and being formed with slot extending longitudinally and centrally within and along the opposite side thereof, said protrusion and said slot being of complemental interfitting cross-sectional shape to provide for face-to face interlocking disposition of a first course of said standard blocks with respect to a second course thereof in a wall structure, a second plurality of tie beam blocks, each tie beam block of which has a body portion in the shape of an elongated rectangular prism, each tie beam block being formed with a first concrete forming slot extending longitudinally and centrally along one side thereof and a second slot extending longitudinally and centrally within and along the opposite side thereof, said second slot and said protrusion of said standard building block being of complemental interfitting cross-sectional shape to provide for face-to-face interlocking disposition of a course of said tie beam blocks with respect to the top course of said standard blocks in a wall structure, and a third plurality of column blocks, each of which column blocks has a body portion in the shape of an elongated rectangular prism, each column block being formed with a protrusion extending longitudinally and centrally along one side thereof to a distance of about one-half of said column block length, and being formed with a slot extending longitudinally and centrally within and along the opposite side thereof and substantially coextensive with respect to said column block protrusion, said column block protrusion and slot being of complemental interfitting cross-sectional shape to provide for face-to-face interlocking disposition of a vertical column of said column blocks interspaced with end portions of alternate courses of said standard building blocks and the other one-half of said column block including a through opening extending between said one side and said opposite side thereof and further including a plurality of cube blocks fitted between outwardly projecting end portions of a plurality of vertical column block interspaced with end portions of alternate courses of said standard building blocks, said cube blocks being formed with side-to-side through openings in registry with said through openings of said column blocks when so interspaced therewith to provide a continuous, internal, vertical void for the reception of concrete for strengthening purposes.