INTERACTION OF DETERIORATING PROCESSES IN CEMENT-BASED MATERIALS
If service life of reinforced concrete structures is to be predicted, usually one dominantdeteriorating mechanism is taken into consideration. In reality, however, concrete structuresare exposed to a number of simultaneously or consecutively acting deteriorating processes. Inpractice a multitude of environmental loads will superimpose mechanical loads in most cases.In this contribution the influence of frost damage on rate of carbonation and on chloridepenetration will be outlined. This is meant to be an example for the influence of damageinduced to the microstructure of concrete on rate of carbonation and on chloride penetration.It will be demonstrated by appropriate experimental results that both the rate of carbonationand the penetration depth of chlorides increase considerably after modest frost damage.Characteristic damage of the micro-structure is caused by frost damage. These results indicateclearly that it is mandatory to take synergetic damage of the microstructure into considerationfor a realistic service life prediction.
F.H.Wittmann Peng Zhang Tiejun Zhao
Aedificat Institute Freiburg,Germany;Qingdao Technological University,Qingdao 266033,P.R.China Qingdao Technological University,Qingdao 266033,P.R.China
国际会议
南京
英文
299-311
2008-10-13（万方平台首次上网日期，不代表论文的发表时间）