Experimental Study on Frost Resistance Durability and Service Life Prediction of Normal Cement Concrete

Abstract

The existing concrete structures, especially hydraulic dams, in the cold areas of northern China have suffered from freeze-thaw damages to varying degrees in the small part or the vast areas of the projects. This paper will work out the performance deterioration index with the relative dynamic elastic modulus and the mass loss rate of the concrete. The test shows that there is a linear relationship between the concrete's relative dynamic elastic modulus and the increasing number of freezing-thawing cycles; the mass loss rate, however, varies with the water-cement ratio and displays different tendency of changes in the initial phase of the cycle, but the mass is decreased in the later phase. Besides, combining with the application, the writer will simulate the concrete's freezing-thawing process under actual operation conditions with the standard test data, in order to offer the presumption model of freezing-thawing durability and predict the residual freezing-thawing life of the concrete, thus providing theoretical basis for the structure's maintenance, repair, and dismantlement.