Study on the Effect of Different Admixtures on the Early Autogenous Shrinkage of High Performance Concrete of Bridge Deck Pavement

Abstract:

This paper analyzed the mechanism of early autogenous shrinkage of concrete, and studied the influence of early autogenous shrinkage of high performance concrete-(HPC) admixed with different kinds of materials of bridge deck pavement. Four different concrete mixes were used: fiber, fiber plus expansive agent, fiber plus fly ash and fiber plus shrinkage-reducing agent. The result shows that the four different mixes can inhibit the autogenous shrinkage of HPC to a certain extent, the inhibitory effect of different mixes in the order of strong to weak is: fiber plus shrinkage-reducing agent, fiber plus fly ash, fiber plus expansive agent, and fiber itself. Furthermore, the inhibition mechanism of each mix was analyzed and a conclusion of mixture of fiber plus fly ash to be the best choice considered of economic and working performance is drawn as well.

• Periodical: Advanced Materials Research (Volume 857)
• Pages: 56-63
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.857.56
• Online since: December 2013
• Authors: Xiang Qian Li*, Bo Tian, Wei Liu, She Su
• Keywords: Admixture, Bridge Deck Pavement, Early Autogenous Shrinkage, High-Performance Concrete (HPC), Inhibition Mechanism

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