Damaging Formula of the Frost Resistant Concrete with Poor Quality of Coarse Limestone Aggregate  

作　　者：Eneli Liisma Lembi-Merike Raado 

机构地区：[1]Department of BuiMing Production, Tallinn University of Technology, Tallinn 19086, Estonia

出　　处：《Journal of Civil Engineering and Architecture》2015年第5期598-603,共6页土木工程与建筑（英文版）

摘　　要：In this paper, concrete with limestone coarse aggregate was studied due to frost action in saline and nonsaline environments. The main focus is to explain the damaging formula of concrete with poor quality of limestone aggregate in frost actions. All investigated concretes fulfill the recommendations of the European standard EN 206, Concrete--Specification, Performance, Production and Conformity limiting values for composition and properties of concrete （maximum W/C （water/cement） ratio, minimal class of compressive strength, minimal mass of cement and minimal percentage of entrained air）. The damaging formula of the frost resistant concrete is studied through scaling test of concrete during freeze/thaw process, frost resistant test of coarse limestone aggregate and chemical analysis of limestone. Experiments results showed that there is a correlation between CaO/MgO ratio and Al2O3 of limestone and frost resistance of concrete, using chemical composition for determining potential ACR （alkali-carbonate reactivity） will indicate higher risk of damaging effect of concrete.

关 键 词：CONCRETE LIMESTONE freeze/thaw CaO/MgO ratio Al2O3 ACR. 

分 类 号：TQ172.41[化学工程—水泥工业] TV431[化学工程—硅酸盐工业]