Study On Application Of Concrete With High Content Fly-ash In Construction

Fly ash concrete generally refer to concrete added fly ash. Fly ash is now recognized as the 5th or 6th components of concrete. Fly ash concrete not only can realize the resourceful of fly ash, it but also can solve environment pollution problem, improve concrete quality, add concrete variety, reduce hydrating heat and lower the cost. Fly ash concrete can bring preferable society benefit, economy benefit and environment benefit.Technology development of fly ash concrete root in America in 1930's, later the technology has been used and developed widely all around the world. Its applying field extended continually and its applying level improved too. China begins to apply fly ash concrete from 1958 in important project. After several decades development, the technology is now applied in all kinds of structure such as Three Gorges project and Jinmao Great Building, which has .bring great benefits.Fly ash added to concrete led to low earlier strength .which restricts the mix amount and its application. Recent years engineers take great effort to increase the mix amount of fly ash. Great progress has been made. In this article, research achievements about are summarized .This article also introduces working propriety, mechanics property and durability of large amount fly ash concrete. According to the engineer practice of Super Guanting Lake Bridge, the paper proves that large amount fly ash concrete can applied in large volume concrete as well as civil engineering and bridge structure. It has a wide prospect.We haven't find report on large amount fly ash concrete using as frame of pile and pier. The paper makes new exploration on aggregate ratio planning and accumulate some experience in construction and quality management.