Tests of Compressive Strength and Durability of Concrete Added with High Lime Fly Ash

The ompressive strength,and the resistances to carbonation and to choride ion penetration of concrete with different eantents ofⅡclass orⅢclass high lime fly ash are experimentally studied.Compared to the reference concrete,with increase of blending ofⅡclass high lime fly ash,the 28 day's compressive strength of concrete is slow, while 60 or 90 day's compressive strength are reaching or exceeding the reference one.The 28 day's compressive strength of the concrete with II class high lime fly ash is higher than the concrete withⅢclass high lime fly ash,and the increases of strength is insignificant after 28 days. Carbonization degree of the concrete withⅡclass high lime fly ash is all lower than the reference,while with III class high lime fly ash is higher.And the re- sistance to chloride penetration of concrete with two kinds of high lime fly ash is better than the reference concrete.