Light Polymer Cement Mortar Pavement for Orthotropic Steel Bridge Decks

Abstract

The mechanical behavior of pavement on orthotropic steel bridge deck with rib stiffener, longitudinal clapboard and diaphragm was analyzed at first by finite element method. It shows that the larger the elastic modulus of the intermediate layer, the less stress in the critical fatigue parts of the surfacing and the more favorable to the whole deck pavement. So it is necessary to exploit a stiffer cement-based transition layer to improve the mechanical condition between bridge deck and pavement. Then, in terms of the advantage and great achievements of light concrete and polymer modified cement concrete in civil engineering, reasonable materials were selected and their mixing ratios were designed to prepare light polymer cement mortar (LPCM) with both advantages suitable for transition layer for the steel bridge deck pavement. And compressive strength, flexural strength, fatigue performance, characteristics of stress-strain curves and modification mechanism were analysed. The results turn out that (1) the density of the developed mortar is about