Study of application of lightweight aggregate concrete to construct post-tensioned long-span slabs

Abstract

In Poland, in the last few years, there have been attempts to construct post-tensioned concrete slabs with above average spans and slenderness. Some very thin slabs with spans of up to 17.6mhave been designed and made. At work, an example of the construction of such slabs accompanied by the results of monitoring of the deflections of one of them for one year has been presented. Also, the results of the calculation analysis of concrete stress and deflections of the slab in an implemented version and with lightweight concrete with a density of 1710kg /m3 have been presented. The opportunities and benefits of the use of such concrete for the construction of post-tensioned large-span slabs have been discussed.