登入選單

返回Google圖書搜尋

Evaluation of Potential Concrete Deterioration Related to Magnesium Chloride (MgCl2) Deicing Salts

Ronald L. KozikowskiPeter Clement TaylorWioleta A. Pyć

出版	Portland Cement Association, 2007
URL	http://books.google.com.hk/books?id=oHhbYgEACAAJ&hl=&source=gbs_api

註釋

The use of magnesium chloride (MgCl2) as a deicing chemical has gained popularity due in part to its ability to significantly reduce the freezing temperature of precipitation. However, reports of concrete deterioration possibly linked to the use of MgCl2 salts have recently increased. A few laboratory studies have been conducted to determine the effects that MgCl2 has on concrete. Some studies report that the deterioration witnessed in the field is possibly the result of chemical attack on the concrete that weakens the paste structure. The findings from other studies vary greatly, as do some field reports that suggest DOT's have used the salt solution for as many as 10 years with no subsequent concrete damage. The purpose of this study was to provide further documentation on the effects that MgCl2 may have on concrete. Laboratory tests indicated the possible deterioration mechanism is not related to physical effects that are commonly associated with deicers and concrete distress such as freeze-thaw scaling and salt crystallization. Although little to no visual deterioration was observed in concrete test specimens, microscopic evaluation indicated minor chemical attack similar to other studies.