Ashton, L.A., 1953. PRESTRESSED CONCRETE AND HIGH TEMPERATURES. Fire Research Notes 72
In Great Britain the study of prestressed concrete at high temperatures has been concerned solely with its behaviour in fires. This aspect is being covered by means of standard laboratory tests which measure the fire-resistance of elements of construction. The work started in 1949 with a number of tests on light types of pretensioned floor unit, which did not form part of a planned programme. A systematic investigation of post-tensioned beams followed, which was designed to show the effect on fire-resistance of the most important variables. Research of a more fundamental nature now in hand, dealing with some of the properties of concrete and cold-drawn steel wire at high temperatures. The question of residual strength and repairability of prestressed concrete after fires of much shorter duration than would lead to failure is also receiving attention.