APPLICATION OF AIR ENTRAINED CONCRETE IN TOLLWAYS CONSTRUCTIONS IN LIAONING PROVINCE OF CHINA

Author: Wencui Yang, Xiaoping Cai, Yong Ge and Jie Yuan
Paper category: Proceedings
Book title: Proceedings of the International RILEM Conference on Materials, Systems and Structures in Civil Engineering Conference Segment on Frost Action in Concrete
Editor(s): Marianne Tange Hasholt, Katja Fridh and R. Doug Hooton
ISBN:978-2-35158-182-7
e-ISBN:978-2-35158-183-4
Publisher:RILEM Publications SARL
Publication year:2016
Pages:222-231
Total Pages:10
Language:English

Abstract: Liaoning Province is located in northeast China, from 38°43' to 43°26' north latitude. The analysis of 30 years weather data showed that there were many annual freeze-thaw cycles in this area, which caused severe frost deterioration of concrete. The survey of tollways and roads in Liaoning Province found that scaling damage on affiliated concrete constructions and bridges concrete was common and severe. In a rebuilding project of tollways from Shenyang City to Siping City, we recommended to use air entraining agent, fly ash and slag to improve the frost resistance of concrete. Specimens were selected from the construction sites randomly and the air voids structure and the frost resistance were tested, and the results showed that the durability of most air entrained concrete was improved. However, two concrete mixtures with the air content of 4% failed in the frost test, which could attribute to their unsatisfactory air voids structure and greater spacing factor. In addition, some suggestions for air entrained concrete construction and quality control are described.

Online publication:2016
Publication type:full_text
Public price (Euros):0.00