Abstract
The post-tensioning effect in the concrete slabs described in this paper is achieved by an internally restrained expansion mechanism, which is the result of using an expansive additive in combination with steel fibre reinforcement. Due to this effect, the tensile stresses in the slab due to restrained contraction as well as flexure are compensated and significantly reduced by up to 50% while the curling at the edges of the slab is eliminated. In this paper, the modelling and design process are outlined based on the experience of several million square meters of successfully completed slabs in the last decade. Multiple full-scale loading tests have been analysed by back-calculation and compared to laboratory test results of the constituent materials. The benefits of the presented slab system are an extended service life, significantly reduced maintenance requirements, direct cost savings at the installation and a reduced carbon footprint due to the reduction of concrete and cement consumption. The innovative slab system has been developed and patented by Primekss in Latvia. It has now been in use since 2008 and is considered by owners and tenants as the new generation of concrete flooring technologies.
| Original language | English |
|---|---|
| Title of host publication | Fib 2018 - Proceedings for the 2018 Fib Congress: Better, Smarter, Stronger |
| Publisher | Federation Internationale du Beton |
| Publication date | 2019 |
| Pages | 3410-3420 |
| Publication status | Published - 2019 |
| Event | The International Federation for Structural Concrete 5th International fib Congress - Melbourne, Australia Duration: 7 Oct 2018 → 11 Oct 2018 Conference number: 5 |
Conference
| Conference | The International Federation for Structural Concrete 5th International fib Congress |
|---|---|
| Number | 5 |
| Country/Territory | Australia |
| City | Melbourne |
| Period | 07/10/2018 → 11/10/2018 |