Analysis of Reasons of Concrete Crack in Cast-in-Situ Pier Base of Hangzhou Bay Sea-Crossing Bridge and A Study on Measures for Cracking Prevention

Concrete of the cast-in-situ pier base in the Hangzhou Bay Sea-Crossing Bridge is prone to crack because of the aggressive environment,special structure and construction technology.The cracking reasons of concrete in the cast-in-situ pier base are discussed by temperature stress calculation.A new hydration heat-reducing admixture is developed which could reduce temperature rise and restrain cracking in the concrete at early age effectively.