Improvements in concrete roads
421,293. Expansion joints for roads and floors. LANGLEY, F. A., 161, Borough High Street, London. July 31, 1933, No. 21622. [Classes 20 (iv) and 87 (i)] The edges of the sections 1 of a concrete road or floor are reinforced at the expansion joints by embedding, or otherwise securing into the concrete, on either side of the joint, strips 3 of highly compressed concrete. In the construction shown, the strips are faced with a top layer 4 of steel, and the lower faces 5 thereof are grooved to key the strips to the sections 1. In modifications, the keying effect is obtained by forming grooves in one or both side faces of the strips, these grooves being provided instead of, or in addition to, those in the lower faces 5. In another modification the strips are composed of a material known by the Registered Trade Mark " Stelcon," such material consisting of highly compressed concrete faced with a layer of mixed highly compressed concrete and steel chips.