Study of the Mechanical Behavior of High-Strength Lightweight Concrete and Its Application to Bridge Pavements

High-strength lightweight concrete (HSLC) is increasingly in demand for reducing the self-weight of concrete structures, achieved in this study using shale ceramsite aggregate. Despite its potential, HSLC has been underutilized in field projects due to concerns about its strength and long-term stabi...

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Bibliographic Details
Published in:Buildings (Basel) 2024-09, Vol.14 (9), p.2783
Main Authors: Song, Qi, Qin, Yue, Hou, Chuantan, Gao, Hongwu, Li, Mengzhao
Format: Article
Language:English
Subjects:
Aggregates
Bragg gratings
Bridge failure
Bridges
Cement hydration
Composite materials
Compressive strength
Concrete
Concrete structures
damage mechanism
Deformation
Engineering
Equipment and supplies
Failure mechanisms
fiber optical sensors
Fiber optics
High rise buildings
High strength
high-strength lightweight concrete
Highway construction
Lightweight concretes
Load
Mechanical properties
Pavements
Sensors
Shale
shale ceramsite content
Shales
Temperature
Trends
Weight reduction
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Summary:High-strength lightweight concrete (HSLC) is increasingly in demand for reducing the self-weight of concrete structures, achieved in this study using shale ceramsite aggregate. Despite its potential, HSLC has been underutilized in field projects due to concerns about its strength and long-term stability. This study investigates the impact of shale ceramsite content on the mechanical properties of HSLC through uniaxial compression, flexural, and bending tests. The results reveal that ceramsite content significantly influences the concrete’s mechanical properties and failure mechanisms. An optimal design of HSLC was proposed in this study and further used in a real field highway project, demonstrating its applicability to bridge pavements. Newly developed fiber Bragg grating sensors were installed in the material to monitor the performance of the HSLC. Concrete performance monitoring was conducted using a new type of fiber Bragg grating sensor independently developed by the research team. The results showed that the higher the ceramsite content, the greater the shrinkage deformation. And similarly, the higher the strength, the greater the shrinkage deformation. The outcome of this study would provide an alternative approach for the application of HSLC in civil infrastructures.
ISSN:2075-5309
2075-5309
DOI:10.3390/buildings14092783