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Cement-Based Transition Layer for Orthotropic Steel Bridge Decks
The mechanical behavior of wearing surface on orthotropic steel bridge deck with rib stiffener, longitudinal clapboard and diaphragm was analyzed by Finite Element Method (FEM), it shows that the higher elastic modulus of the intermediate layer, the less stress in the critical fatigue parts of the surfacing and the more favorable to the whole wearing surface. So it is necessary to exploit a stiffer cement-based transition layer for the steel bridge deck pavement, to improve the mechanical conditions between bridge deck and pavement. Given the advantage and great achievements of light concrete and polymer modified cement concrete in civil engineering, reasonable materials were selected and designed to prepare light polymer cement mortar (LPCM), with both advantages. And flexural strength, compressive strength, fatigue, characteristics of stress-strain curves and chloride ion penetration test were carried out. The results turn out that the density of mortar was about 1800 kg/m3, light mortar. Acrylic acid can decrease water-cement ratio, improve paste working property, increase flexibility and crack resistance of the mortar, and there is a best dosage. Action mechanism shows that high-tensile strength of the polymer membrane is significantly improved LPCM mechanical properties. It means that light polymer mortar is an excellent flexible cement material. And it can be used at some place where thickness, weight and flexibility have special required, such as bridge deck pavement, etc.
Cement-Based Transition Layer for Orthotropic Steel Bridge Decks
The mechanical behavior of wearing surface on orthotropic steel bridge deck with rib stiffener, longitudinal clapboard and diaphragm was analyzed by Finite Element Method (FEM), it shows that the higher elastic modulus of the intermediate layer, the less stress in the critical fatigue parts of the surfacing and the more favorable to the whole wearing surface. So it is necessary to exploit a stiffer cement-based transition layer for the steel bridge deck pavement, to improve the mechanical conditions between bridge deck and pavement. Given the advantage and great achievements of light concrete and polymer modified cement concrete in civil engineering, reasonable materials were selected and designed to prepare light polymer cement mortar (LPCM), with both advantages. And flexural strength, compressive strength, fatigue, characteristics of stress-strain curves and chloride ion penetration test were carried out. The results turn out that the density of mortar was about 1800 kg/m3, light mortar. Acrylic acid can decrease water-cement ratio, improve paste working property, increase flexibility and crack resistance of the mortar, and there is a best dosage. Action mechanism shows that high-tensile strength of the polymer membrane is significantly improved LPCM mechanical properties. It means that light polymer mortar is an excellent flexible cement material. And it can be used at some place where thickness, weight and flexibility have special required, such as bridge deck pavement, etc.
Cement-Based Transition Layer for Orthotropic Steel Bridge Decks
Li, Xue-lian (author) / Chen, Yu-liang (author) / Zhou, Zhi-gang (author)
GeoHunan International Conference 2011 ; 2011 ; Hunan, China
Pavements and Materials ; 225-232
2011-05-16
Conference paper
Electronic Resource
English
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