The STUDIA UNIVERSITATIS BABEŞ-BOLYAI issue article summary

The summary of the selected article appears at the bottom of the page. In order to get back to the contents of the issue this article belongs to you have to access the link from the title. In order to see all the articles of the archive which have as author/co-author one of the authors mentioned below, you have to access the link from the author's name.

  
       
         
    STUDIA CHEMIA - Issue no. 1 / 2009  
         
  Article:   MINERALOGY OF DEGRADATION PROCESSES AFFECTING THE MORTAR FROM BURU DAM (ARIEŞULUI VALLEY, CLUJ COUNTY).

Authors:  NICOLAE HAR, MARIA GOREA, MARCEL BENEA. 		 
       
         
  Abstract:   The objective under study is represented by the dam construction work across Arieş River on the area of Buru locality (Cluj County). The mortar used in dam construction is affected by carbonation, sulphates attack and alkali-silica reactions. Carbonation is materialized by calcite precipitation in matrix mortar, visible as efflorescences on surface and along the fissures within the mortar. Sulphate attack results in ettringite II genesis, located in the pores of the mortar. The alkali-silica reactions lead to the formation of silica gels deposited on the internal walls of the pores where they progressively crystallize and turn into cryptocrystalline silica. There are various causes for alteration processes, from atmospheric factors to the microenvironment resulted from the high polluants concentration into the Arieş River water.

Keywords: mortar, carbonation, sulphate attack, alkali – silica reactions 		 
         
     
         
         
      Back to previous page