Abstract
Through the experiment, this paper carries on the appraisal to the cracking risk of cross-sea bridge concrete. Analyzed the influence of active admixture, sand ratio, cement content and water-cement ratio to the cracked degree of concrete. And proposed control measure of the plastic shrinkage cracking of concrete. Finally, through research to the concrete used in pile cap of the Shanghai Yangtze River Bridge, it obtains that all can be allowed to reduce the cracking risk of concrete by reducing active admixture, increasing to fly ash amount, reducing sand ratio, the slag powder has little effect the cracking risk of concrete, the silica fume can increase the cracking risk of concrete.
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