Curable compositions of resin-linear organosiloxane block copolymers that exhibit stress relaxation behavior are disclosed. The torsional springs can include perpendicular-beam springs or double folded beams which allow axial movement of the spring when heated. , a concrete wall, bridge, pillars, using a smart aggregate is disclosed. 50 to 200 h\u22121, and an aromatic compoundolefin molar ratio of between 1:1 and 50:1. The insulating annual block includes an annular groove located at the shoulder.